LT6233/LT LT6234/LT MHz, Rail-to-Rail Output, 1.9nV/ Hz, 1.2mA Op Amp Family. Applications. Typical Application

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1 Features n Low Noise Votage:.9nV/ Hz n Low Suppy Current:.2mA/Amp Max n Low Offset Votage: 3 Max n Gain-Bandwidth Product: LT6233: 6MHz; A V LT6233-: 37MHz; A V n Wide Suppy Range: 3V to 2.6V n Output Swings Rai-to-Rai n Common Mode Rejection Ratio: db Typ n Output Current: 3mA n Operating Temperature Range: C to 8 C n LT6233 Shutdown to µa Maximum n LT6233/LT6233- in a Low Profie (mm) ThinSOT Package n Dua LT623 in 8-Pin SO and Tiny DFN Packages n LT623 in a 6-Pin SSOP Package Appications n Utrasound Ampifiers n Low Noise, Low Power Signa Processing n Active Fiters n Driving A/D Converters n Rai-to-Rai Buffer Ampifiers Description LT6233/LT6233-6MHz, Rai-to-Rai Output,.9nV/ Hz,.2mA Op Amp Famiy The LT 6233/ are singe/dua/quad ow noise, rai-to-rai output unity-gain stabe op amps that feature.9nv/ Hz noise votage and draw ony.2ma of suppy current per ampifier. These ampifiers combine very ow noise and suppy current with a 6MHz gainbandwidth product, a 7V/µs sew rate and are optimized for ow suppy votage signa conditioning systems. The LT6233- is a singe ampifier optimized for higher gain appications resuting in higher gain bandwidth and sew rate. The LT6233 and LT6233- incude an enabe pin that can be used to reduce the suppy current to ess than µa. The ampifier famiy has an output that swings within of either suppy rai to maximize the signa dynamic range in ow suppy appications and is specified on 3.3V, V and ±V suppies. The e n I SUPPLY product of 2. per ampifier is among the most noise efficient of any op amp. The LT6233/LT6233- are avaiabe in the 6-ead SOT 23 package and the LT623 dua is avaiabe in the 8-pin SO package with standard pinouts. For compact ayouts, the dua is aso avaiabe in a tiny dua fine pitch eadess package (DFN). The LT623 is avaiabe in the 6-pin SSOP package. L, LT, LTC, LTM, Linear Technoogy and the Linear ogo are registered trademarks of Linear Technoogy Corporation. ThinSOT is a trademark of Linear Technoogy Corporation. A other trademarks are the property of their respective owners. Typica Appication Low Noise Low Power Instrumentation Ampifier Noise Votage and Unbaanced Noise Current vs Frequency IN IN V S /2 LT623 R 9.9Ω /2 LT623 V S R2 7Ω R3 7Ω R 99Ω R 99Ω A V = 2 BW = 2.8MHz V S = ±.V to ±V V S LT6233 V S R6 99Ω EN R7 99Ω V OUT 6233 TAa I S = 3mA E N = 8 RMS INPUT REFERRED, MEASUREMENT BW = MHz NOISE VOLTAGE (nv/ Hz) V S = ±2.V V CM = V NOISE VOLTAGE NOISE CURRENT k k k 6233 TAb UNBALANCED NOISE CURRENT (pa/ Hz)

2 LT6233/LT6233- Absoute Maximum Ratings Tota Suppy Votage (V to V )...2.6V Input Current (Note 2)... ±ma Output Short-Circuit Duration (Note 3)... Indefinite Operating Temperature Range (Note )... C to 8 C Specified Temperature Range (Note )... C to 8 C Junction Temperature... C Pin Configuration (Note ) Junction Temperature (DD Package)... 2 C Storage Temperature Range... 6 C to C Storage Temperature Range (DD Package)... 6 C to 2 C Lead Temperature (Sodering, sec)...3 C TOP VIEW OUT V 2 IN 3 TOP VIEW 6 V ENABLE IN OUT A IN A IN A V V OUT B IN B IN B S6 PACKAGE 6-LEAD PLASTIC TSOT-23 T JMAX = C, θ JA = 2 C/W DD PACKAGE 8-LEAD (3mm 3mm) PLASTIC DFN T JMAX = 2 C, θ JA = 6 C/W UNDERSIDE METAL CONNECTED TO V (PCB CONNECTION OPTIONAL) TOP VIEW OUT A IN A 2 IN A 3 V TOP VIEW S8 PACKAGE 8-LEAD PLASTIC SO T JMAX = C, θ JA = 9 C/W V OUT B IN B IN B OUT A IN A 2 IN A 3 V IN B IN B 6 OUT B 7 NC 8 A B D C OUT D IN D IN D V IN C IN C OUT C NC GN PACKAGE 6-LEAD NARROW PLASTIC SSOP T JMAX = C, θ JA = 3 C/W 2

3 LT6233/LT6233- Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT6233CS6#PBF LT6233CS6#TRPBF LTAFL 6-Lead Pastic TST-23 C to 7 C LT6233IS6#PBF LT6233IS6#TRPBF LTAFL 6-Lead Pastic TST-23 C to 8 C LT6233CS6-#PBF LT6233CS6-#TRPBF LTAFM 6-Lead Pastic TST-23 C to 7 C LT6233IS6-#PBF LT6233IS6-#TRPBF LTAFM 6-Lead Pastic TST-23 C to 8 C LT623CS8#PBF LT623CS8#TRPBF Lead Pastic SO C to 7 C LT623IS8#PBF LT623IS8#TRPBF 623I 8-Lead Pastic SO C to 8 C LT623CDD#PBF LT623CDD#TRPBF LAET 8-Lead (3mm 3mm) Pastic DFN C to 7 C LT623IDD#PBF LT623IDD#TRPBF LAET 8-Lead (3mm 3mm) Pastic DFN C to 8 C LT623CGN#PBF LT623CGN#TRPBF Lead Narrow Pastic SSOP C to 7 C LT623IGN#PBF LT623IGN#TRPBF 623I 6-Lead Narrow Pastic SSOP C to 8 C Consut LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a abe on the shipping container. Consut LTC Marketing for information on non-standard ead based finish parts. For more information on ead free part marking, go to: For more information on tape and ree specifications, go to: Eectrica Characteristics, V S = V, V; V S = 3.3V, V; V CM = V OUT = haf suppy, ENABLE = V, uness otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V OS Input Offset Votage LT6233S6, LT6233S6- LT623S8, LT623GN LT623DD Input Offset Votage Match (Channe-to-Channe) (Note 6) I B Input Bias Current. 3 µa I B Match (Channe-to-Channe) (Note 6)..3 µa I OS Input Offset Current..3 µa Input Noise Votage.Hz to Hz 22 nv P-P e n Input Noise Votage Density f = khz, V S = V.9 3 nv/ Hz i n Input Noise Current Density, Baanced Source Input Noise Current Density, Unbaanced Source f = khz, V S = V, R S = k f = khz, V S = V, R S = k.3.78 pa/ Hz pa/ Hz Input Resistance Common Mode Differentia Mode C IN Input Capacitance Common Mode Differentia Mode A VOL Large-Signa Gain V S = V, V O =.V to.v, R L = k to V S /2 V S = V, V O =.V to.v, R L = k to V S /2 V S = 3.3V, V O =.6V to 2.6V, R L = k to V S /2 V S = 3.3V, V O =.6V to 2.6V, R L = k to V S /2 V CM Input Votage Range Guaranteed by CMRR, V S = V, V Guaranteed by CMRR, V S = 3.3V, V CMRR Common Mode Rejection Ratio V S = V, V CM =.V to V V S = 3.3V, V CM =.V to 2.6V MΩ kω pf pf V/ V/ V/ V/ V V db db CMRR Match (Channe-to-Channe) (Note 6) V S = V, V CM =.V to V 8 db 3

4 LT6233/LT6233- Eectrica Characteristics, V S = V, V; V S = 3.3V, V; V CM = V OUT = haf suppy, ENABLE = V, uness otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS PSRR Power Suppy Rejection Ratio V S = 3V to V 9 db PSRR Match (Channe-to-Channe) (Note 6) V S = 3V to V 8 db Minimum Suppy Votage (Note 7) 3 V V OL Output Votage Swing Low (Note 8) No Load I SINK = ma V S = V, I SINK = ma V S = 3.3V, I SINK = ma V OH Output Votage Swing High (Note 8) No Load I SOURCE = ma V S = V, I SOURCE = ma V S = 3.3V, I SOURCE = ma I SC Short-Circuit Current V S = V V S = 3.3V I S Suppy Current per Ampifier Disabed Suppy Current per Ampifier ENABLE = V.3V I ENABLE ENABLE Pin Current ENABLE =.3V 2 7 µa V L ENABLE Pin Input Votage Low.3 V V H ENABLE Pin Input Votage High V.3 V Output Leakage Current ENABLE = V.3V, V O =.V to 3.V.2 µa t ON Turn-On Time ENABLE = V to V, R L = k, V S = V ns t OFF Turn-Off Time ENABLE = V to V, R L = k, V S = V 76 µs GBW Gain-Bandwidth Product Frequency = MHz, V S = V LT6233- SR Sew Rate V S = V, A V =, R L = k, V O =.V to 3.V V/µs LT6233-, V S = V, A V =, R L = k, 8 V/µs V O =.V to 3.V FPBW Fu-Power Bandwidth V S = V, V OUT = 3V P-P (Note 9).6.6 MHz LT6233-, HD2 = HD3 % 2.2 MHz t S Setting Time (LT6233, LT623, LT623).%, V S = V, V STEP = 2V, A V =, R L = k 7 ns ± ± ± ± ma ma ma µa MHz MHz

5 LT6233/LT6233- Eectrica Characteristics The denotes the specifications which appy over the C < T A < 7 C temperature range. V S = V, V; V S = 3.3V, V; V CM = V OUT = haf suppy, ENABLE = V, uness otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT V OS Input Offset Votage LT6233CS6, LT6233CS6- LT623CS8, LT623CGN LT623CDD Input Offset Votage Match (Channe-to-Channe) (Note 6) 6 8 V OS TC Input Offset Votage Drift (Note ) V CM = Haf Suppy. 3. / C I B Input Bias Current 3. µa I B Match (Channe-to-Channe) (Note 6). µa I OS Input Offset Current. µa A VOL Large-Signa Gain V S = V, V O =.V to.v, R L = k to V S /2 V S = V, V O =.V to.v, R L = k to V S /2 V S = 3.3V, V O =.6V to 2.6V, R L = k to V S /2 V S = 3.3V, V O =.6V to 2.6V, R L = k to V S /2 V CM Input Votage Range Guaranteed by CMRR V S = V, V Vs = 3.3V, V CMRR Common Mode Rejection Ratio V S = V, V CM =.V to V V S = 3.3V, V CM =.V to 2.6V CMRR Match (Channe-to-Channe) (Note 6) V S = V, V CM =.V to V 8 db PSRR Power Suppy Rejection Ratio V S = 3V to V 9 db PSRR Match (Channe-to-Channe) (Note 6) V S = 3V to V 8 db Minimum Suppy Votage (Note 7) 3 V V OL Output Votage Swing Low (Note 8) No Load I SINK = ma V S = V, I SINK = ma V S = 3.3V, I SINK = ma V OH Output Votage Swing High (Note 8) No Load I SOURCE = ma V S = V, I SOURCE = ma V S = 3.3V, I SOURCE = ma I SC Short-Circuit Current V S = V V S = 3.3V I S Suppy Current per Ampifier Disabed Suppy Current per Ampifier ENABLE = V.2V ±3 ± V/ V/ V/ V/ V V db db ma ma. ma µa I ENABLE ENABLE Pin Current ENABLE =.3V 8 µa V L ENABLE Pin Input Votage Low.3 V V H ENABLE Pin Input Votage High V.2 V Output Leakage Current ENABLE = V.2V, V O =.V to 3.V µa t ON Turn-On Time ENABLE = V to V, R L = k, V S = V ns t OFF Turn-Off Time ENABLE = V to V, R L = k, V S = V 2 µs SR Sew Rate V S = V, A V =, R L = k, V O =.V to 3.V 9 V/µs LT6233-, A V =, R L = k, V O =.V to 3.V 7 V/µs FPBW Fu-Power Bandwidth (Note 9) V S = V, V OUT = 3V P-P ; LT6233C, LT623C, LT623C 9 khz

6 LT6233/LT6233- Eectrica Characteristics The denotes the specifications which appy over the C < T A < 8 C temperature range. V S = V, V; V S = 3.3V, V; V CM = V OUT = haf suppy, ENABLE = V, uness otherwise noted. (Note ) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V OS Input Offset Votage LT6233IS6, LT6233IS6- LT623IS8, LT623IGN LT623IDD Input Offset Votage Match (Channe-to-Channe) (Note 6) 7 6 V OS TC Input Offset Votage Drift (Note ) V CM = Haf Suppy. 3 / C I B Input Bias Current µa I B Match (Channe-to-Channe) (Note 6). µa I OS Input Offset Current. µa A VOL Large-Signa Gain V S = V, V O =.V to.v, R L = k to V S /2 V S = V, V O =.V to.v, R L = k to V S /2 V S = 3.3V, V O =.6V to 2.6V, R L = k to V S /2 V S = 3.3V, V O =.6V to 2.6V, R L = k to V S /2 V CM Input Votage Range Guaranteed by CMRR V S = V, V V S = 3.3V, V CMRR Common Mode Rejection Ratio V S = V, V CM =.V to V V S = 3.3V, V CM =.V to 2.6V CMRR Match (Channe-to-Channe) (Note 6) V S = V, V CM =.V to V 8 db PSRR Power Suppy Rejection Ratio V S = 3V to V 9 db PSRR Match (Channe-to-Channe) (Note 6) V S = 3V to V 8 db Minimum Suppy Votage (Note 7) 3 V V OL Output Votage Swing Low (Note 8) No Load I SINK = ma V S = V, I SINK = ma V S = 3.3V, I SINK = ma V OH Output Votage Swing High (Note 6) No Load I SOURCE = ma V S = V, I SOURCE = ma V S = 3.3V, I SOURCE = ma I SC Short-Circuit Current V S = V V S = 3.3V I S Suppy Current per Ampifier Disabed Suppy Current per Ampifier ENABLE = V.2V ±3 ± V/ V/ V/ V/ V V db db ma ma. ma µa I ENABLE ENABLE Pin Current ENABLE =.3V µa V L ENABLE Pin Input Votage Low.3 V V H ENABLE Pin Input Votage High V.2 V Output Leakage Current ENABLE = V.2V, V O =.V to 3.V µa t ON Turn-On Time ENABLE = V to V, R L = k, V S = V ns t OFF Turn-Off Time ENABLE = V to V, R L = k, V S = V 3 µs SR Sew Rate V S = V, A V =, R L = k, V O =.V to 3.V 8 V/µs LT6233-, A V =, R L = k, V O =.V to 3.V 7 V/µs FPBW Fu-Power Bandwidth (Note 9) V S = V, V OUT = 3V P-P ; LT6233I, LT623I, LT623I 88 khz 6

7 LT6233/LT6233- Eectrica Characteristics,, V CM = V OUT = V, ENABLE = V, uness otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V OS Input Offset Votage LT6233S6, LT6233S6- LT623S8, LT623GN LT623DD Input Offset Votage Match (Channe-to-Channe) (Note 6) I B Input Bias Current. 3 µa I B Match (Channe-to-Channe) (Note 6)..3 µa I OS Input Offset Current..3 µa Input Noise Votage.Hz to Hz 22 nv P-P e n Input Noise Votage Density f = khz.9 3. nv/ Hz i n Input Noise Current Density, Baanced Source Input Noise Current Density, Unbaanced Source f = khz, R S = k f = khz, R S = k.3.78 pa/ Hz pa/ Hz Input Resistance Common Mode Differentia Mode C IN Input Capacitance Common Mode Differentia Mode A VOL Large-Signa Gain V O = ±.V, R L = k V O = ±.V, R L = k V CM Input Votage Range Guaranteed by CMRR 3 V CMRR Common Mode Rejection Ratio V CM = 3V to V 9 db CMRR Match (Channe-to-Channe) (Note 6) V CM = 3V to V 8 2 db PSRR Power Suppy Rejection Ratio V S = ±.V to ±V 9 db PSRR Match (Channe-to-Channe) (Note 6) V S = ±.V to ±V 8 db V OL Output Votage Swing Low (Note 8) No Load I SINK = ma I SINK = ma V OH Output Votage Swing High (Note 8) No Load I SOURCE = ma I SOURCE = ma I SC Short-Circuit Current ± ± ma I S Suppy Current per Ampifier.. ma Disabed Suppy Current per Ampifier ENABLE =.6V.2 µa I ENABLE ENABLE Pin Current ENABLE =.3V 3 8 µa V L ENABLE Pin Input Votage Low.3 V V H ENABLE Pin Input Votage High.6 V Output Leakage Current ENABLE =.6V, V O = ±V.2 µa t ON Turn-On Time ENABLE = V to V, R L = k 9 ns t OFF Turn-Off Time ENABLE = V to V, R L = k µs GBW Gain-Bandwidth Product Frequency = MHz LT6233- SR Sew Rate A V =, R L = k, V O = 2V to 2V 2 7 V/µs LT6233-, A V =, R L = k, V O = 2V to 2V V/µs FPBW Fu-Power Bandwidth V OUT = 3V P-P (Note 9).27.8 MHz LT6233-, HD2 = HD3 % 2.2 MHz t S Setting Time (LT6233, LT623, LT623).%, V STEP = 2V, A V =, R L = k 7 ns MΩ kω pf pf V/ V/ MHz MHz 7

8 LT6233/LT6233- Eectrica Characteristics The denotes the specifications which appy over the C < T A < 7 C temperature range., V CM = V OUT = V, ENABLE = V, uness otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V OS Input Offset Votage LT6233CS6, LT6233CS6- LT623CS8, LT623CGN LT623CDD Input Offset Votage Match (Channe-to-Channe) (Note 6) 6 8 V OS TC Input Offset Votage Drift (Note ). 3 / C I B Input Bias Current 3. µa I B Match (Channe-to-Channe) (Note 6). µa I OS Input Offset Current. µa A VOL Large-Signa Gain V O = ±.V, R L = k V O = ±.V, R L = k V CM Input Votage Range Guaranteed by CMRR 3 V CMRR Common Mode Rejection Ratio V CM = 3V to V 9 db CMRR Match (Channe-to-Channe) (Note 6) V CM = 3V to V 8 db PSRR Power Suppy Rejection Ratio V S = ±.V to ±V 9 db PSRR Match (Channe-to-Channe) (Note 6) V S = ±.V to ±V 8 db V OL Output Votage Swing Low (Note 8) No Load I SINK = ma I SINK = ma V OH Output Votage Swing High (Note 8) No Load I SOURCE = ma I SOURCE = ma I SC Short-Circuit Current ±3 ma I S Suppy Current per Ampifier.7 ma Disabed Suppy Current per Ampifier ENABLE =.7V µa I ENABLE ENABLE Pin Current ENABLE =.3V 9 µa V L ENABLE Pin Input Votage Low.3 V V H ENABLE Pin Input Votage High.7 V Output Leakage Current ENABLE =.7V, V O = ±V µa t ON Turn-On Time ENABLE = V to V, R L = k 9 ns t OFF Turn-Off Time ENABLE = V to V, R L = k µs SR Sew Rate A V =, R L = k, V O = 2V to 2V V/µs LT6233-, A V =, R L = k, V O = 2V to 2V V/µs FPBW Fu-Power Bandwidth (Note 9) V OUT = 3V P-P ; LT6233C, LT623C, LT623C.6 MHz V/ V/ 8

9 LT6233/LT6233- Eectrica Characteristics The denotes the specifications which appy over the C < T A < 8 C temperature range., V CM = V OUT = V, ENABLE = V, uness otherwise noted. (Note ) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V OS Input Offset Votage LT6233IS6, LT6233IS6- LT623IS8, LT623IGN LT623IDD Input Offset Votage Match (Channe-to-Channe) (Note 6) 7 6 V OS TC Input Offset Votage Drift (Note ). 3 / C I B Input Bias Current µa I B Match (Channe-to-Channe) (Note 6). µa I OS Input Offset Current. µa A VOL Large-Signa Gain V O = ±.V, R L = k V O = ±.V, R L = k V CM Input Votage Range Guaranteed by CMRR 3 V CMRR Common Mode Rejection Ratio V CM = 3V to V 9 db CMRR Match (Channe-to-Channe) (Note 6) V CM = 3V to V 8 db PSRR Power Suppy Rejection Ratio V S = ±.V to ±V 9 db PSRR Match (Channe-to-Channe) (Note 6) V S = ±.V to ±V 8 db V OL Output Votage Swing Low (Note 8) No Load I SINK = ma I SINK = ma V OH Output Votage Swing High (Note 8) No Load I SOURCE = ma I SOURCE = ma I SC Short-Circuit Current ±3 ma I S Suppy Current per Ampifier.7 ma Disabed Suppy Current per Ampifier ENABLE =.8V µa I ENABLE ENABLE Pin Current ENABLE =.3V µa V L ENABLE Pin Input Votage Low.3 V V H ENABLE Pin Input Votage High.8 V Output Leakage Current ENABLE =.8V, V O = ±V µa t ON Turn-On Time ENABLE = V to V, R L = k 9 ns t OFF Turn-Off Time ENABLE = V to V, R L = k 6 µs SR Sew Rate A V =, R L = k, V O = 2V to 2V V/µs LT6233-, A V =, R L = k, V O = 2V to 2V 9 V/µs FPBW Fu-Power Bandwidth (Note 9) V OUT = 3V P-P ; LT6233I, LT623I, LT623I.6 MHz V/ V/ Note : Stresses beyond those isted under Absoute Maximum Ratings may cause permanent damage to the device. Exposure to any Absoute Maximum Rating condition for extended periods may affect device reiabiity and ifetime. Note 2: Inputs are protected by back-to-back diodes. If the differentia input votage exceeds.7v, the input current must be imited to ess than ma. Note 3: A heat sink may be required to keep the junction temperature beow the absoute maximum rating when the output is shorted indefinitey. Note : The LT6233C/LT6233I the LT623C/LT623I, and LT623C/LT623I are guaranteed functiona over the temperature range of C to 8 C. Note : The LT6233C/LT623C/LT623C are guaranteed to meet specified performance from C to 7 C. The LT6233C/LT623C/LT623C are designed, characterized and expected to meet specified performance from C to 8 C, but are not tested or QA samped at these temperatures. The LT6233I/LT623I/LT623I are guaranteed to meet specified performance from C to 8 C. Note 6: Matching parameters are the difference between the two ampifiers A and D and between B and C of the LT623; between the two ampifiers of the LT623. CMRR and PSRR match are defined as foows: CMRR and PSRR are measured in /V on the matched ampifiers. The difference is cacuated between the matching sides in /V. The resut is converted to db. 9

10 LT6233/LT6233- Eectrica Characteristics Note 7: Minimum suppy votage is guaranteed by power suppy rejection ratio test. Note 8: Output votage swings are measured between the output and power suppy rais. Note 9: Fu-power bandwidth is cacuated from the sew rate: FPBW = SR/2πV P Note : This parameter is not % tested. Typica Performance Characteristics (LT6233/) NUMBER OF UNITS V OS Distribution V S = V, V V CM = V /2 S8 2 INPUT OFFSET VOLTAGE () SUPPLY CURRENT (ma) Suppy Current vs Suppy Votage (Per Ampifier) T A = 2 C T A = C TOTAL SUPPLY VOLTAGE (V) OFFSET VOLTAGE () Offset Votage vs Input Common Mode Votage V S = V, V T A = C 3 T A = 2 C INPUT COMMON MODE VOLTAGE (V) 6233 GO 6233 GO GO3 6 Input Bias Current vs Common Mode Votage V S = V, V Input Bias Current vs Temperature 6 V S = V, V Output Saturation Votage vs Load Current (Output Low) V S = V, V INPUT BIAS CURRENT (µa) 3 2 T A = C T A = 2 C INPUT BIAS CURRENT (µa) 3 2 V CM = V V CM =.V OUTPUT SATURATION VOLTAGE (V)... T A = 2 C T A = C COMMON MODE VOLTAGE (V) TEMPERATURE ( C)... LOAD CURRENT (ma) 6233 GO 6233 GO 6233 GO6

11 LT6233/LT6233- Typica Performance Characteristics (LT6233/) OUTPUT SATURATION VOLTAGE (V)... Output Saturation Votage vs Load Current (Output High) V S = V, V T A = 2 C T A = C.. LOAD CURRENT (ma) 6233 G7 OFFSET VOLTAGE () Minimum Suppy Votage. V CM = V S / T A = C..6.8 T A = 2 C TOTAL SUPPLY VOLTAGE (V) 6233 G8 OUTPUT SHORT-CIRCUIT CURRENT (ma) Output Short-Circuit Current vs Power Suppy Votage SINKING SOURCING T A = 2 C T A = C T A = 2 C T A = C POWER SUPPLY VOLTAGE (±V) 6233 GO9 INPUT VOLTAGE () Open-Loop Gain Open-Loop Gain Open-Loop Gain R L = k R L = Ω OUTPUT VOLTAGE (V) V S = 3V, V INPUT VOLTAGE () R L = k R L = Ω V S = V, V OUTPUT VOLTAGE (V) INPUT VOLTAGE () R L = k. R L = Ω OUTPUT VOLTAGE (V) 6233 G 6233 G 6233 G2 OFFSET VOLTAGE () Offset Votage vs Output Current T A = C T A = 2 C OUTPUT CURRENT (ma) CHANGE IN OFFSET VOLTAGE () Warm-Up Drift vs Time V S = ±2.V 2 V S = ±.V 2 3 TIME AFTER POWER-UP (s) TOTAL NOISE (nv/ Hz) Tota Noise vs Tota Source Resistance VS = ±2.V V CM = V f = khz UNBALANCED SOURCE RESISTORS TOTAL NOISE RESISTOR NOISE AMPLIFIER NOISE VOLTAGE. k k k TOTAL SOURCE RESISTANCE (Ω) 6233 G G 6233 G

12 LT6233/LT6233- Typica Performance Characteristics (LT6233/) NOISE VOLTAGE (nv/ Hz) Noise Votage and Unbaanced Noise Current vs Frequency V S = ±2.V V CM = V NOISE VOLTAGE NOISE CURRENT k k k 6233 G UNBALANCED NOISE CURRENT (pa/ Hz) nv/div nv nv.hz to Hz Output Votage Noise V S = ±2.V s/div 6233 G7 GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs Temperature C L = pf R L = k V CM = V S /2 V S = 3V, V V S = 3V, V 2 3 TEMPERATURE ( C) PHASE MARGIN GAIN BANDWIDTH G8 7 6 PHASE MARGIN (DEG) GAIN (db) Open-Loop Gain vs Frequency 8 C L = pf 2 7 R L = k 6 PHASE V CM = V S /2 8 6 V S = 3V, V V S = 3V, V 2 GAIN 6 2 k M M M 8 G 6233 G9 PHASE (DEG) GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs Suppy Votage C L = pf R L = k PHASE MARGIN GAIN BANDWIDTH TOTAL SUPPLY VOLTAGE (V) G PHASE MARGIN (DEG) SLEW RATE (V/µs) Sew Rate vs Temperature A V = R F = R G = k RISING V S = ±2.V RISING FALLING V S = ±2.V FALLING TEMPERATURE ( C) 6233 G2 OUTPUT IMPEDANCE (Ω) Output Impedance vs Frequency k V S = V, V A V = A V = 2 A V =. k M M M 6233 G22 2 COMMON MODE REJECTION RATIO (db) Common Mode Rejection Ratio vs Frequency 2 V S = V, V V CM = V S /2 k k M M M 6233 G23 G CHANNEL SEPARATION (db) k Channe Separation vs Frequency A V = M M M 6233 G2

13 LT6233/LT6233- Typica Performance Characteristics (LT6233/) POWER SUPPLY REJECTION RATIO (db) Power Suppy Rejection Ratio vs Frequency NEGATIVE SUPPLY V S = V, V V CM = V S /2 POSITIVE SUPPLY k k k M M M 6233 G2 OVERSHOOT (%) Series Output Resistance and Overshoot vs Capacitive Load V S = V, V A V = R S = Ω R L = Ω R S = Ω R S = 2Ω CAPACITIVE LOAD (pf) 6233 G26 OVERSHOOT (%) Series Output Resistance and Overshoot vs Capacitive Load V S = V, V A V = 2 R S = Ω R S = 2Ω R S = Ω R L = Ω CAPACITIVE LOAD (pf) 6233 G27 SETTLING TIME (ns) Setting Time vs Output Step (Noninverting) A V = V IN V OUT Ω OUTPUT STEP (V) 6233 G28 SETTLING TIME (ns) Setting Time vs Output Step (Inverting) V IN Ω Ω A V = V OUT OUTPUT STEP (V) 6233 G29 OUTPUT VOLTAGE SWING (V P-P ) Maximum Undistorted Output Signa vs Frequency A V = A V = HD2, HD3 < dbc k k M M 6233 G3 Distortion vs Frequency Distortion vs Frequency Distortion vs Frequency V S = ±2.V A V = V OUT = 2V P-P A V = V OUT = 2V P-P 3 V S = ±2.V A V = 2 V OUT = 2V P-P R L = k, 3RD DISTORTION (dbc) R L = Ω, 2ND R L = Ω, 3RD R L = k, 3RD R L = k, 2ND DISTORTION (dbc) R L = Ω, 2ND R L = Ω, 3RD R L = k, 3RD R L = k, 2ND DISTORTION (dbc) R L = Ω, 2ND R L = Ω, 3RD R L = k, 2ND k k M M k k M M k k M M 6233 G G G33 3

14 LT6233/LT6233- Typica Performance Characteristics (LT6233/) DISTORTION (dbc) k Distortion vs Frequency Large-Signa Response Sma-Signa Response A V = 2 V OUT = 2V P-P R L = Ω, 2ND R L = Ω, 3RD R L = k, 3RD R L = k, 2ND k M M 6233 G3 V/DIV 2V V 2V V S = ±2.V A V = R L = k 2ns/DIV 6233 G3 /DIV V V S = ±2.V A V = R L = k 2ns/DIV 6233 G36 Large-Signa Response Output Overdrive Recovery V 2V/DIV V V IN V/DIV V V V OUT 2V/DIV V A V = R L = k 2ns/DIV 6233 G37 V S = ±2.V A V = 3 2ns/DIV 6233 G38 (LT6233) ENABLE Characteristics SUPPLY CURRENT (ma) Suppy Current vs ENABLE Pin Votage T A = C T A = 2 C ENABLE PIN CURRENT (µa) ENABLE Pin Current vs ENABLE Pin Votage T A = C T A = 2 C V S = ±2.V A V = V OUT ENABLE V V.V V ENABLE Pin Response Time.2 V S = ±2.V PIN VOLTAGE (V) PIN VOLTAGE (V) V S = ±2.V V IN =.V A V = R L = k 2µs/DIV 6233 G 6233 G G

15 LT6233/LT6233- Typica Performance Characteristics (LT6233-) GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs Temperature A V = V S = 3V, V V S = 3V, V GAIN BANDWIDTH PHASE MARGIN TEMPERATURE ( C) 6233 G2 7 6 PHASE MARGIN (DEG) SLEW RATE (V/µs) Sew Rate vs Temperature 2 A V = 8 R F = k 6 R G = Ω FALLING RISING 2 8 V S = ±2.V RISING 6 V S = ±2.V FALLING TEMPERATURE ( C) 6233 G3 OVERSHOOT (%) Series Output Resistor and Overshoot vs Capacitive Load V S = V, V A V = R S = 2Ω R S = Ω R S = Ω CAPACITIVE LOAD (pf) 6233 G GAIN (db) Open-Loop Gain and Phase vs Frequency 8 A V = 2 7 PHASE C L = pf R L = k 6 V 8 CM = V S /2 6 GAIN V S = 3V, V V S = 3V, V k M M M G 6233 G PHASE (DEG) GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs Suppy Votage A V = C L = pf R L = k GAIN BANDWIDTH PHASE MARGIN TOTAL SUPPLY VOLTAGE (V) 6233 G6 PHASE MARGIN (DEG) GAIN BANDWIDTH (MHz) Gain Bandwidth vs Resistor Load AV V S = ±V R F = k R G = Ω TOTAL RESISTOR LOAD (Ω) (INCLUDES FEEDBACK R) 6233 G7 COMMON MODE REJECTION RATIO (db) Common Mode Rejection Ratio vs Frequency k k M M V S = V, V V CM = V S /2 M 6233 G8 G OUTPUT VOLTAGE SWING (V P-P ) Maximum Undistorted Output vs Frequency k A V = HD2, HD3 dbc k M M 6233 G9 DISTORTION (dbc) k 2nd and 3rd Harmonic Distortion vs Frequency V S = ±2.V A V = V OUT = 2V P-P R L = Ω, 3RD R L = k, 3RD R L = Ω, 2ND R L = k, 2ND k M M 6233 G

16 LT6233/LT6233- Typica Performance Characteristics (LT6233-) DISTORTION (dbc) nd and 3rd Harmonic Distortion vs Frequency Large-Signa Response Output-Overoad Recovery A V = V OUT = 2V P-P R L = Ω, 3RD R L = k, 2ND R L = Ω, 2ND R L = k, 3RD V OUT 2V/DIV V V OUT 2V/DIV V IN.V/DIV V V 9 k k M M A V = R F = 9Ω R G = Ω ns/div 6233 G2 V S = V, V A V = R F = 9Ω R G = Ω ns/div 6233 G G Sma-Signa Response Input Referred High Frequency Noise Spectrum V OUT /DIV 2.V nv/ Hz/DIV V S = V, V A V = R F = 9Ω R G = Ω ns/div 6233 G khz 2MHz/DIV 2MHz 6233 G 6

17 LT6233/LT6233- Appications Information Ampifier Characteristics Figure is a simpified schematic of the LT6233/LT623/ LT623, which has a pair of ow noise input transistors Q and Q2. A simpe current mirror Q3/Q converts the differentia signa to a singe-ended output, and these transistors are degenerated to reduce their contribution to the overa noise. Capacitor C reduces the unity-cross frequency and improves the frequency stabiity without degrading the gain bandwidth of the ampifier. Capacitor C M sets the overa ampifier gain bandwidth. The differentia drive generator suppies current to transistors Q and Q6 that swing the output from rai-to-rai. Input Protection There are back-to-back diodes, D and D2 across the and inputs of these ampifiers to imit the differentia input votage to ±.7V. The inputs of the LT6233/ do not have interna resistors in series with the input transistors. This technique is often used to protect the input devices from overvotage that causes excessive current to fow. The addition of these resistors woud significanty degrade the ow noise votage of these ampifiers. For instance, a Ω resistor in series with each input woud generate.8nv/ Hz of noise, and the tota ampifier noise votage woud rise from.9nv/ Hz to 2.6nV/ Hz. Once the input differentia votage exceeds ±.7V, steady-state current conducted through the protection diodes shoud be imited to ±ma. This impies 2Ω of protection resistance is necessary per vot of overdrive beyond ±.7V. These input diodes are rugged enough to hande transient currents due to ampifier sew rate overdrive and cipping without protection resistors. The photo of Figure 2 shows the output response to an input overdrive with the ampifier connected as a votage foower. With the input signa ow, current source I saturates and the differentia drive generator drives Q6 into saturation so the output votage swings a the way to V. The input can swing positive unti transistor Q2 saturates into current mirror Q3/Q. When saturation occurs, the output tries to phase invert, but diode D2 conducts current from the signa source to the output through the feedback connection. The output is camped a diode drop beow the input. In this photo, the input signa generator is imiting at about 2mA. V/DIV 2.V V 2.V µs/div 6233 F2 Figure 2. V S = ±2.V, A V = with Large Overdrive DESD V V DESD2 C V Q3 DIFFERENTIAL DRIVE GENERATOR V IN Q Q2 V D D2 Q6 Q C M Q V V V DESD V OUT DESD6 V IN DESD3 DESD I BIAS ENABLE V V 6233 F V Figure. Simpified Schematic 7

18 LT6233/LT6233- Appications Information With the ampifier connected in a gain of A V 2, the output can invert with very heavy overdrive. To avoid this inversion, imit the input overdrive to.v beyond the power suppy rais. ESD The LT6233/ have reverse-biased ESD protection diodes on a inputs and outputs as shown in Figure. If these pins are forced beyond either suppy, unimited current wi fow through these diodes. If the current is transient and imited to one hundred miiamps or ess, no damage to the device wi occur. Noise The noise votage of the LT6233/ is equivaent to that of a 22Ω resistor, and for the owest possibe noise it is desirabe to keep the source and feedback resistance at or beow this vaue, i.e., R S R G R FB 22Ω. With R S R G R FB = 22Ω the tota noise of the ampifier is: e N = (.9nV) 2 (.9nV) 2 = 2.69nV/ Hz Beow this resistance vaue, the ampifier dominates the noise, but in the region between 22Ω and about 3k, the noise is dominated by the resistor therma noise. As the tota resistance is further increased beyond 3k, the ampifier noise current mutipied by the tota resistance eventuay dominates the noise. The product of e N I SUPPLY is an interesting way to gauge ow noise ampifiers. Most ow noise ampifiers with ow e N have high I SUPPLY current. In appications that require ow noise votage with the owest possibe suppy current, this product can prove to be enightening. The LT6233/ have an e N I SUPPLY product of ony 2. per ampifier, yet it is common to see ampifiers with simiar noise specifications to have e N I SUPPLY as high as 3.. For a compete discussion of ampifier noise, see the LT28 data sheet. Enabe Pin The LT6233 and LT6233- incude an ENABLE pin that shuts down the ampifier to µa maximum suppy current. The ENABLE pin must be driven ow to operate the ampifier with norma suppy current. The ENABLE pin must be driven high to within.3v of V to shut down the suppy current. This can be accompished with simpe gate ogic; however care must be taken if the ogic and the LT6233 operate from different suppies. If this is the case, then open-drain ogic can be used with a pu-up resistor to ensure that the ampifier remains off. See Typica Performance Characteristics. The output eakage current when disabed is very ow; however, current can fow into the input protection diodes D and D2 if the output votage exceeds the input votage by a diode drop. 8

19 Typica Appications Singe Suppy, Low Noise, Low Power, Bandpass Fiter with Gain = LT6233/LT6233- V IN C pf R 732Ω R2 732Ω C3.µF C2 7pF R3 k R k V LT6233 EN.µF V OUT f = = MHz 2πRC C = C,C2 R = R = R2 f = ( 732Ω ) MHz, MAXIMUM f = MHz R f 3dB = f 2. A V = 2dB at f E N = 6 RMS INPUT REFERRED I S =.ma FOR V = V GAIN (db) 23 3 Frequency Response Pot of Bandpass Fiter 6233 F3 7 k M M 6233 F Low Power, Low Noise, Singe Suppy, Instrumentation Ampifier with Gain = V IN C2 22pF C µf R6 Ω R 3.9Ω R3 3.9Ω V U LT6233- V R2 Ω EN R Ω R6 88.7Ω R 88.7Ω R3 2k R2 Ω C8 68pF R Ω C9 68pF V U3 LT6233 EN V OUT V IN2 C3 µf R Ω U2 LT6233- EN R 2k C µf V OUT = (V IN2 V IN ) GAIN = ( R2 ) ( R ) R R INPUT RESISTANCE = R = R6 f 3dB = 3Hz TO 2.MHz E N = RMS INPUT REFERRED I S =.7mA FOR V S = V, V R = R3 R2 = R R = R2 R = R F 9

20 LT6233/LT6233- Package Description S6 Package 6-Lead Pastic TSOT-23 (Reference LTC DWG # ).62 MAX.9 REF 2.9 BSC (NOTE ).22 REF 3.8 MAX 2.62 REF. MIN 2.8 BSC..7 (NOTE ) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR.9 BSC.3. 6 PLCS (NOTE 3) BSC DATUM A. MAX...3. REF BSC (NOTE 3) S6 TSOT NOTE:. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR. MOLD FLASH SHALL NOT EXCEED.2mm 6. JEDEC PACKAGE REFERENCE IS MO-93 2

21 LT6233/LT6233- Package Description DD Package 8-Lead Pastic DFN (3mm 3mm) (Reference LTC DWG # Rev C).7 ±. 3. ±. 2. ±..6 ±. (2 SIDES) PACKAGE OUTLINE.2 ±.. BSC 2.38 ±. RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R =.2 TYP 8. ±. PIN TOP MARK (NOTE 6).2 REF 3. ±. ( SIDES).7 ±....6 ±. (2 SIDES).2 ±.. BSC 2.38 ±. BOTTOM VIEW EXPOSED PAD (DD8) DFN 9 REV C NOTE:. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M-229 VARIATION OF (WEED-) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED.mm ON ANY SIDE. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN LOCATION ON TOP AND BOTTOM OF PACKAGE 2

22 LT6233/LT6233- Package Description S8 Package 8-Lead Pastic Sma Outine (Narrow. Inch) (Reference LTC DWG # -8-6). BSC. ± (.8.) NOTE MIN.6 ± ( )..7 ( ) NOTE 3.3 ±. TYP RECOMMENDED SOLDER PAD LAYOUT (.23.2)..2 (.2.8) 8 TYP.3.69 (.36.72).. (..2) (.6.27) (.3.83) NOTE: INCHES TYP. DIMENSIONS IN (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED.6" (.mm). (.27) BSC SO8 33 GN Package 6-Lead Pastic SSOP (Narrow. Inch) (Reference LTC DWG # -8-6). ± * (.8.978) (.229) REF.2 MIN ( )..7** ( ).6 ±..2 BSC RECOMMENDED SOLDER PAD LAYOUT (.78.29). ±. (.38 ±.) 8 TYP (.3.7)..98 (.2.29) (.6.27) NOTE:. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS) 3. DRAWING NOT TO SCALE * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED.6" (.2mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED." (.2mm) PER SIDE.8.2 (.23.3) TYP.2 (.63) BSC GN6 (SSOP) 2

23 LT6233/LT6233- Revision History (Revision history begins at Rev C) REV DATE DESCRIPTION PAGE NUMBER C / Revised y-axis abe on curve G in Typica Performance Characteristics Updated ENABLE Pin section in Appications Information 8 Information furnished by Linear Technoogy Corporation is beieved to be accurate and reiabe. However, no responsibiity is assumed for its use. Linear Technoogy Corporation makes no representation that the interconnection of its circuits as described herein wi not infringe on existing patent rights. 23

24 LT6233/LT6233- Typica Appications The LT6233 is appied as a transimpedance ampifier with an I-to-V conversion gain of kω set by R. The LT6233 is ideay suited to this appication because of its ow input offset votage and current, and its ow noise. This is because the k resistor has an inherent therma noise of 3nV/ Hz or.3pa/ Hz at room temperature, whie the LT6233 contributes ony 2nV and.8pa/ Hz. So, with respect to both votage and current noises, the LT6233 is actuay quieter than the gain resistor. The circuit uses an avaanche photodiode with the cathode biased to approximatey 2V. When ight is incident on the photodiode, it induces a current I PD which fows into the ampifier circuit. The ampifier output fas negative to maintain baance at its inputs. The transfer function is therefore V OUT = I PD k. C ensures stabiity and good setting characteristics. Output offset was measured at better than, so ow in part because R2 serves to cance the DC effects of bias current. Output noise was measured at beow P-P on a 2MHz measurement bandwidth, with C2 shunting R2 s therma noise. As shown in the scope photo, the rise time is ns, indicating a signa bandwidth of 7.8MHz. Low Power Avaanche Photodiode Transimpedance Ampifier I S =.2mA Photodiode Ampifier Time Domain Response ADVANCED PHOTONIX V BIAS C 2.7pF R k /DIV R2 k LT6233 V V ENABLE ns/div 6233 TA2b C2.µF 6233 TA2a OUTPUT OFFSET = TYPICAL BANDWIDTH = 7.8MHz OUTPUT NOISE = P-P (2MHz MEASUREMENT BW) Reated Parts PART NUMBER DESCRIPTION COMMENTS LT28 Singe, Utraow Noise MHz Op Amp.8nV/ Hz LT677 Singe, Low Noise Rai-to-Rai Ampifier 3V Operation, 2.mA,.nV/ Hz, 6 Max V OS LT86/LT87 Singe/Dua, Low Noise 32MHz Rai-to-Rai Ampifier 2.V Operation, Max V OS, 3.nV/ Hz LT62/LT62 Singe/Dua, Low Noise 6MHz.9nV Hz, Rai-to-Rai Input and Output LT622/LT623/LT62 Singe/Dua/Quad, Low Noise, Rai-to-Rai Ampifier.9nV/ Hz, 3mA Max, MHz Gain Bandwidth 2 LT REV C PRINTED IN USA Linear Technoogy Corporation 63 McCarthy Bvd., Mipitas, CA (8) 32-9 FAX: (8) LINEAR TECHNOLOGY CORPORATION 23