LT1490A/LT1491A Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION

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1 FEATURES DESCRIPTION n Low Input Offset otage: 5 Max n Output Swings to m Max from n Rai-to-Rai Input and Output n Micropower: 5/Ampifier Max n Over-The-Top Input Common Mode Range Extends Above, Independent of n Specified on 3, 5 and ±5 Suppies n High Output Current: ma n Output Drives,pF with Output Compensation n Reverse Battery Protection to n No Suppy Sequencing Probems n High otage Gain: 5/m n High CMRR: 9dB n No Phase Reversa n Gain Bandwidth Product: khz n Tiny 3mm 3mm.mm DFN Package APPLICATIONS n Battery- or Soar-Powered Systems Portabe Instrumentation Sensor Conditioning n Suppy Current Sensing n Battery Monitoring n Micropower Active Fiters n ma to ma Transmitters LT9A/LT9A Dua/Quad Over-The-Top Micropower Rai-to-Rai Input and Output Op Amps The LT 9A/LT9A are dua and quad op amps with a ow input offset votage of 5 max. The LT9A/LT9A operate on a singe and spit suppies with a tota votage of to, drawing ony of quiescent current per ampifier. These ampifiers are reverse suppy protected; they draw virtuay no current for reverse suppy up to. The input range of the LT9A/LT9A incudes both suppies and the output swings to both suppies. Unike most micropower op amps, the LT9A/LT9A can drive heavy oads; their rai-to-rai outputs drive ma. The LT9A/LT9A are unity-gain stabe and drive a capacitive oads up to,pf when optiona.μf and 5Ω compensation is used. The LT9A/LT9A have a unique input stage that operates and remains high impedance when above the positive suppy. The inputs take both differentia and common mode even when operating on a 3 suppy. Buit-in resistors protect the inputs for fauts beow the negative suppy up to 5. There is no phase reversa of the output for inputs 5 beow or above, independent of. The LT9A dua op amp is avaiabe in the -pin MSOP, PDIP and SO packages. For space imited appications LT9A is avaiabe in a 3mm 3mm.mm, dua fine pitch eadess package (DFN). The quad LT9A is avaiabe in the -pin SO, PDIP and 5mm 3mm.mm DFN packages. L, LT, LTC, LTM, Over-The-Top, Linear Technoogy and the Linear ogo are registered trademarks of Linear Technoogy Corporation. A other trademarks are the property of their respective owners. Protected by U.S. Patents incuding 55. ICAL APPLICATION Battery Monitor CHARGER OLTAGE R S.Ω I BATT RA k R A k / LT9A Q N39 / LT9A LOGIC LOAD R B k R B k BATT = / LT9A Q N39 S R G k k 9.9k LOGIC HIGH (5) = CHARGING LOGIC LOW () = DISCHARGING / LT9A 9A TA OUT OUT I OUT BATT = = AMPS (R S )(R G /R A )(GAIN) GAIN S = OPEN, GAIN = S = CLOSED, GAIN = R A = R B S = 5, 9afd

2 LT9A/LT9A ABSOLUTE MAXIMUM RATINGS Tota Suppy otage ( to )... Differentia Input otage... Input Current (Note 9)... ±ma Output Short-Circuit Duration (Note )... Continuous Operating Temperature Range (Note 3) LT9AC/LT9AC... C to 5 C LT9AI/LT9AI... C to 5 C LT9AH/LT9AH... C to 5 C PIN CONFIGURATION (Note ) Specified Temperature Range (Note ) LT9AC/LT9AI... C to 5 C LT9AC/LT9AI... C to 5 C LT9AH/LT9AH... C to 5 C Junction Temperature... 5 C Junction Temperature (DD/DHC Package)... 5 C Storage Temperature Range C to 5 C Storage Temperature Range DD/DHC Package C to 5 C Lead Temperature (Sodering, sec)... 3 C LT9A LT9A LT9A TOP IEW TOP IEW OUT A IN A IN A 3 TOP IEW A 7 OUT B 6 IN B 5 IN B MS PACKAGE -LEAD PLASTIC MSOP T JMAX = 5 C, θ JA = 5 C/W B OUT A IN A IN A 3 A OUT B IN B IN B N PACKAGE S PACKAGE -LEAD PDIP -LEAD PLASTIC SO T JMAX = 5 C, θ JA = 3 C/W (N) T JMAX = 5 C, θ JA = 9 C/W (S) B OUT A IN A IN A 3 A DD PACKAGE -LEAD (3mm 3mm) PLASTIC DFN T JMAX = 5 C, θ JA = 6 C/W (NOTE ) UNDERSIDE METAL CONNECTED TO B OUT B IN B IN B LT9A OUT A IN A IN A 3 IN B 5 IN B 6 OUT B 7 TOP IEW A B OUT D D 3 IN D IN D C 9 IN C IN C OUT C N PACKAGE S PACKAGE -LEAD PDIP -LEAD PLASTIC SO T JMAX = 5 C, θ JA = C/W (N) T JMAX = 5 C, θ JA = 5 C/W (S) LT9A OUT A IN A IN A IN B IN B OUT B NC TOP IEW A B 6 OUT D 5 IN D IN D 3 IN C IN C OUT C 9 NC DHC6 PACKAGE 6-LEAD (5mm 3mm) PLASTIC DFN T JMAX = 5 C, θ JA = 6 C/W (NOTE ) UNDERSIDE METAL CONNECTED TO D C 9afd

3 LT9A/LT9A ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT9ACMS#PBF LT9ACMS#TRPBF LTNG -Lead Pastic MSOP C to 7 C LT9AIMS#PBF LT9AIMS#TRPBF LTPU -Lead Pastic MSOP C to 5 C LT9AHMS#PBF LT9AHMS#TRPBF LTRK -Lead Pastic MSOP C to 5 C LT9ACS#PBF LT9ACS#TRPBF 9A -Lead Pastic SO C to 7 C LT9AIS#PBF LT9AIS#TRPBF 9AI -Lead Pastic SO C to 5 C LT9AHS#PBF LT9AHS#TRPBF 9AH -Lead Pastic SO C to 5 C LT9ACN#PBF LT9ACN#TRPBF LT9ACN -Lead PDIP C to 7 C LT9AIN#PBF LT9AIN#TRPBF LT9AIN -Lead PDIP C to 5 C LT9ACDD#PBF LT9ACDD#TRPBF LAAH -Lead (3mm 3mm) Pastic DFN C to 7 C LT9AIDD#PBF LT9AIDD#TRPBF LAAH -Lead (3mm 3mm) Pastic DFN C to 5 C LT9ACS#PBF LT9ACS#TRPBF LT9ACS -Lead Pastic SO C to 7 C LT9AIS#PBF LT9AIS#TRPBF LT9AIS -Lead Pastic SO C to 5 C LT9AHS#PBF LT9AHS#TRPBF LT9AHS -Lead Pastic SO C to 5 C LT9ACN#PBF LT9ACN#TRPBF LT9ACN -Lead PDIP C to 7 C LT9AIN#PBF LT9AIN#TRPBF LT9AIN -Lead PDIP C to 5 C LT9ACDHC#PBF LT9ACDHC#TRPBF 9A 6-Lead (5mm 3mm) Pastic DFN C to 7 C LT9AIDHC#PBF LT9AIDHC#TRPBF 9A 6-Lead (5mm 3mm) Pastic DFN C to 5 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: 9afd 3

4 LT9A/LT9A ELECTRICAL CHARACTERISTICS The denotes specifications which appy over the fu operating temperature range of C T A 5 C, otherwise specifications are at T A = 5 C. S = 3, ; S = 5, ; CM = OUT = haf suppy uness otherwise noted. (Note ) LT9AC/LT9AC LT9AI/LT9AI SYMBOL PARAMETER CONDITIONS MIN MAX UNITS OS Input Offset otage (Note 5) LT9A N, S Packages 5 C T A 7 C C T A 5 C 7 LT9A MS Package, LT9A N, S Packages C T A 7 C C T A 5 C LT9A DD, LT9A DHC 5 C T A 7 C C T A 5 C 6 Input Offset otage Drift (Note 9) C T A 5 C LT9A DD, LT9A DHC, C T A 5 C 6 / C / C I OS Input Offset Current.. na CM = (Note 6). I B Input Bias Current na CM = (Note 6) S = 3.3 na Input Bias Current Drift C T A 5 C pa/ C Input Noise otage.hz to Hz P-P e n Input Noise otage Density f = khz 5 n/ Hz i n Input Noise Current Density f = khz.5 pa/ Hz R IN Input Resistance Differentia Common Mode, CM = to C IN Input Capacitance.6 pf Input otage Range CMRR Common Mode Rejection Ratio (Note 6) CM = to CC CM = to 9 9 db db A OL Large-Signa otage Gain S = 3, O = 5m to.5, R L = k C T A 7 C C T A 5 C S = 5, O = 5m to.5, R L = k C T A 7 C C T A 5 C OL Output otage Swing Low S = 3, No Load S = 3, I SINK = 5mA S = 5, No Load S = 5, I SINK = 5mA S = 5, I SINK = ma OH Output otage Swing High S = 3, No Load S = 3, I SOURCE = 5mA S = 5, No Load S = 5, I SOURCE = ma I SC Short-Circuit Current (Note ) S = 3, Short to GND S = 3, Short to CC S = 5, Short to GND 5 S = 5, Short to CC 5 7 MΩ MΩ 5 /m /m /m 5 /m /m /m m m m m m ma ma ma ma 9afd

5 LT9A/LT9A ELECTRICAL CHARACTERISTICS The denotes specifications which appy over the fu operating temperature range of C T A 5 C, otherwise specifications are at T A = 5 C. S = 3, ; S = 5, ; CM = OUT = haf suppy uness otherwise noted. (Note ) LT9AC/LT9AC LT9AI/LT9AI SYMBOL PARAMETER CONDITIONS MIN MAX UNITS PSRR Power Suppy Rejection Ratio S =.5 to.5, CM = O = 9 db Minimum Operating Suppy otage.5 Reverse Suppy otage I S = per Ampifier 7 I S Suppy Current per Ampifier 5 (Note 7) 55 GBW Gain Bandwidth Product (Note 6) SR Sew Rate (Note ) f = khz C T A 7 C C T A 5 C A =, R L = C T A 7 C C T A 5 C The denotes specifications which appy over the fu operating temperature range of C T A 5 C, otherwise specifications are at T A = 5 C. S = ±5, CM =, OUT = uness otherwise noted. (Note ) khz khz khz.6 /μs /μs /μs LT9AC/LT9AC LT9AI/LT9AI SYMBOL PARAMETER CONDITIONS MIN MAX UNITS OS Input Offset otage (Note 5) LT9A N, S Packages 5 7 C T A 7 C C T A 5 C 95 LT9A MS Package, LT9A N, S Packages 5 C T A 7 C C T A 5 C 35 5 LT9A DD, LT9A DHC 5 C T A 7 C C T A 5 C 55 7 Input Offset otage Drift (Note 9) C T A 5 C LT9A DD, LT9A DHC, C T A 5 C 6 7 / C / C I OS Input Offset Current.. na I B Input Bias Current na Input Bias Current Drift C T A 5 C 5 pa/ C Input Noise otage.hz to Hz P-P e n Input Noise otage Density f = khz 5 n/ Hz i n Input Noise Current Density f = khz.5 pa/ Hz R IN Input Resistance Differentia Common Mode, CM = 5 to C IN Input Capacitance.6 pf Input otage Range 5 9 CMRR Common Mode Rejection Ratio CM = 5 to 9 9 db A OL Large-Signa otage Gain O = ±, R L = k C T A 7 C C T A 5 C O Output otage Swing No Load I OUT = ±5mA I OUT = ±ma 75 5 ±.9 ±.5 ±.5 MΩ MΩ 5 /m /m /m ±.97 ±.75 ±.67 9afd 5

6 LT9A/LT9A ELECTRICAL CHARACTERISTICS The denotes specifications which appy over the fu operating temperature range of C T A 5 C, otherwise specifications are at T A = 5 C. S = ±5, CM =, OUT = uness otherwise noted. (Note ) LT9AC/LT9AC LT9AI/LT9AI SYMBOL PARAMETER CONDITIONS MIN MAX UNITS I SC Short-Circuit Current (Note ) Short to GND C T A 7 C C T A 5 C ± ±5 ± ±5 ma ma ma PSRR Power Suppy Rejection Ratio S = ±.5 to ± 9 db I S Suppy Current per Ampifier GBW Gain Bandwidth Product f = khz C T A 7 C C T A 5 C SR Sew Rate A =, RL =, O = ±, Measured at O = ±5 C T A 7 C C T A 5 C The denotes specifications which appy over the fu operating temperature range of C T A 5 C, S = 3, ; S = 5, ; CM = OUT = haf suppy uness otherwise noted. (Note ) khz khz khz.7 /μs LT9AH/LT9AH SYMBOL PARAMETER CONDITIONS MIN MAX UNITS OS Input Offset otage (Note 5) LT9AHS 5 5 LT9AHMS, LT9AHS 3 Input Offset otage Drift (Note 9) 3 6 / C I OS Input Offset Current na CM = (Note 6).5 I B Input Bias Current na CM = (Note 6) 5 Input otage Range.3 CMRR Common Mode Rejection Ratio (Note 6) CM =.3 to CC CM =.3 to 6 7 db db A OL Large-Signa otage Gain S = 3, O = 5m to.5, R L = k S = 5, O = 5m to.5, R L = k OL Output otage Swing Low S = 3, No Load S = 3, I SINK =.5mA S = 5, No Load S = 5, I SINK =.5mA OH Output otage Swing High S = 3, No Load S = 3, I SOURCE = 5mA S = 5, No Load S = 5, I SOURCE = ma /μs /μs 5 /m /m 5 /m /m PSRR Power Suppy Rejection Ratio S =.5 to.5, CM = O = db Minimum Operating Suppy otage.5 Reverse Suppy otage I S = per Ampifier m m m m 6 9afd

7 LT9A/LT9A ELECTRICAL CHARACTERISTICS The denotes specifications which appy over the fu operating temperature range of C T A 5 C. S = ±5, CM =, OUT = uness otherwise noted. (Note ) LT9AH/LT9AH SYMBOL PARAMETER CONDITIONS MIN MAX UNITS I S Suppy Current per Ampifier (Note 7) 5 7 GBW Gain Bandwidth Product (Note 6) f = khz khz 6 khz SR Sew Rate (Note ) A =, R L =.35.6 /μs.5 /μs OS Input Offset otage (Note 5) LT9AHS LT9AHMS, LT9AHS 5 3 Input Offset otage Drift (Note 9) 3 7 / C I OS Input Offset Current na I B Input Bias Current na Input otage Range.7 9 CMRR Common Mode Rejection Ratio CM =.7 to 9 7 db A OL Large-Signa otage Gain O = ±, R L = k 5 /m /m O Output otage Swing No Load I OUT = ±.5mA PSRR Power Suppy Rejection Ratio S = ±.5 to ± db I S Suppy Current per Ampifier GBW Gain Bandwidth Product f = khz 5 khz 75 khz SR Sew Rate A =, R L = /μs. /μs ±. ±.3 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 : A heat sink may be required to keep the junction temperature beow absoute maximum. This depends on the power suppy votage and how many ampifi ers are shorted. The θ JA specifi ed for the DD and DHC package is with minima PCB heat spreading meta. Using expanded meta area on a ayers of a board reduces this vaue. Note 3: The LT9AC/LT9AC and LT9AI/LT9AI are guaranteed functiona over the operating temperature range of C to 5 C. The LT9AH/LT9AH are guaranteed functiona over the operating temperature range of C to 5 C. Note : The LT9AC/LT9AC are guaranteed to meet specifi ed performance from C to 7 C. The LT9AC/LT9AC are designed, characterized and expected to meet specifi ed performance from C to 5 C but are not tested or QA samped at these temperatures. The LT9AI/LT9AI are guaranteed to meet specifi ed performance from C to 5 C. The LT9AH/LT9AH are guaranteed to meet specifi ed performance from C to 5 C. Note 5: ESD (eectrostatic discharge) sensitive device. Extensive use of ESD protection devices are used interna to the LT9A/LT9A. However, high eectrostatic discharge can damage or degrade the device. Use proper ESD handing precautions. Note 6: S = 5 imits are guaranteed by correation to S = 3 and S = ±5 tests. Note 7: S = 3 imits are guaranteed by correation to S = 5 and S = ±5 tests. Note : Guaranteed by correation to sew rate at S = ±5 and GBW at S = 3 and S = ±5 tests. Note 9: This parameter is not % tested. 9afd 7

8 LT9A/LT9A ICAL PERFORMANCE CHARACTERISTICS SUPPLY CURRENT PER AMPLIFIER () Suppy Current vs Suppy otage 7 T A = 5 C 6 T A = 5 C 5 T A = 55 C 3 CHANGE IN INPUT OFFSET OLTAGE () 3 3 Minimum Suppy otage T A = 5 C T A = 55 C T A = 5 C INPUT BIAS CURRENT (na) Input Bias Current vs Common Mode otage S = 5, T A = 55 C T A = 5 C T A = 5 C TOTAL SUPPLY OLTAGE () 3 5 TOTAL SUPPLY OLTAGE () COMMON MODE OLTAGE () 9A G 9A G 9A G3 OUTPUT SATURATION OLTAGE () m m μ Output Saturation otage vs Load Current (Output High) S = 5, T A = 5 C T A = 5 C T A = 55 C μ μ m m m SOURCING LOAD CURRENT (A) OUTPUT SATURATION OLTAGE () m m m.μ Output Saturation otage vs Load Current (Output Low) S = 5, T A = 5 C T A = 5 C T A = 55 C μ μ μ m m SINKING LOAD CURRENT (A) m OUTPUT SATURATION OLTAGE (m) Output Saturation otage vs Input Overdrive S = 5, NO LOAD OUTPUT HIGH OUTPUT LOW 3 5 INPUT OERDRIE (m) 9A G 9A G5 9A G6 NOISE OLTAGE (n/di).hz to Hz Noise otage S = ± TIME (SEC) 9A G7 INPUT NOISE OLTAGE DENSITY (n/ Hz) 6 Noise otage Density vs Frequency k FREQUENCY (Hz) 9A G INPUT NOISE CURRENT DENSITY (pa/ Hz) Input Noise Current vs Frequency k FREQUENCY (Hz) 9A G9 9afd

9 ICAL PERFORMANCE CHARACTERISTICS LT9A/LT9A GAIN (db) GAIN BANDWIDTH PRODUCT (khz) GAIN BANDWIDTH PRODUCT (khz) Gain and Phase Shift vs Frequency GAIN PHASE S = ±.5 FREQUENCY (khz) 9A G 6 6 PHASE SHIFT (DEG) GAIN BANDWIDTH PRODUCT (khz) Gain Bandwidth Product vs Temperature f = khz S = ±.5 S = ± TEMPERATURE ( C) Sew Rate vs Temperature Gain Bandwidth Product and Phase Margin vs Suppy otage CMRR vs Frequency PSRR vs Frequency 6 R L = k f = khz TOTAL SUPPLY OLTAGE () PHASE MARGIN GAIN BANDWIDTH 9A G PHASE MARGIN (DEG) COMMON MODE REJECTION RATIO (db) 6 FREQUENCY (khz) Gain Bandwidth Product and Phase Margin vs Load Resistance Channe Separation vs Frequency Output Impedance vs Frequency PHASE MARGIN S = ±.5 A = R F = R G = k f = khz GAIN BANDWIDTH LOAD RESISTANCE (kω) 9A G PHASE MARGIN (DEG) CHANNEL SEPARATION (db) S = ±.5 S = ±5 FREQUENCY (khz) 9A G 9A G S = ±5 9A G7 SLEW RATE (/μs) POWER SUPPLY REJECTION RATIO (db) OUTPUT IMPEDANCE (Ω) k k.. RISING, S = ±5 RISING, S = ±.5 FALLING, S = ±5 FALLING, S = ± TEMPERATURE ( C) S = ±.5 NEGATIE SUPPLY S = ±.5 A = A = A = POSITIE SUPPLY FREQUENCY (khz) 9A G 9A G5 FREQUENCY (khz) 9A G 9afd 9

10 LT9A/LT9A ICAL PERFORMANCE CHARACTERISTICS OUTPUT SWING ( P-P ) Undistorted Output Swing vs Frequency. S = ±5 S = 5, DISTORTION % FREQUENCY (khz) OUTPUT STEP () 6 6 Setting Time to.% vs Output Step S = ±5 A = A = A = A = 6 6 SETTLING TIME (μs) OERSHOOT (%) Capacitive Load Handing, Overshoot vs Capacitive Load S = 5, I SOURCE = 7 A = A = A = A = 5 CAPACITIE LOAD (pf) 9A G9 9A F 9A G THD NOISE (%).. Tota Harmonic Distortion Noise vs Frequency S = 3, OUT = P-P CM =. R L = 5k A = A =... FREQUENCY (khz) 9A G THD NOISE (%).. Tota Harmonic Distortion Noise vs Load Resistance S = 3 TOTAL A = IN = P-P AT khz S = ±.5 IN = ± S = 3, IN =.5 TO.5 S = 3, IN =. TO... LOAD RESISTANCE TO GROUND (kω) 9A G3 THD NOISE (%).. Tota Harmonic Distortion Noise vs Output otage R L = k CM = HALF SUPPLY f = khz A = S = ±.5 A = S = 3, A = S = ±.5 A = S = 3,. 3 OUTPUT OLTAGE ( P-P ) 9A G Open-Loop Gain Large-Signa Response Sma-Signa Response CHANGE IN INPUT OFFSET OLTAGE (/DI) R L = k R L = 5k R L = k S = ±5 9A G5 S = ±5 OUTPUT OLTAGE (5/DI) A = 9A G6 S = ±5 A = 9A G7 9afd

11 APPLICATIONS INFORMATION Suppy otage The positive suppy pin of the LT9A/LT9A shoud be bypassed with a sma capacitor (about.μf) within an inch of the pin. When driving heavy oads an additiona.7μf eectroytic capacitor shoud be used. When using spit suppies, the same is true for the negative suppy pin. The LT9A/LT9A are protected against reverse battery votages up to. In the event a reverse battery condition occurs, the suppy current is ess than na. The LT9A/LT9A can be shut down by removing. In this condition the input bias current is typicay ess than.5na, even if the inputs are above the negative suppy. When operating the LT9A/LT9A on tota suppies of or more, the suppy must not rise to its fina votage in ess than μs. This is especiay true if ow ESR bypass capacitors are used. A series RLC circuit is formed from the suppy ead inductance and the bypass capacitor. A resistance of 7.5Ω in the suppy or in the bypass capacitor wi dampen the tuned circuit enough to imit the rise time. Inputs The LT9A/LT9A have two input stages, NPN and PNP (see the Simpified Schematic), resuting in three distinct operating regions as shown in the Input Bias Current vs Common Mode typica performance curve. For input votages about. or more beow, the PNP input stage is active and the input bias current is typicay na. When the input votage is about.5 or ess from, the NPN input stage is operating and the input bias current is typicay 5nA. Increases in temperature wi cause the votage at which operation switches from the PNP stage to the NPN stage to move towards. The input offset votage of the NPN stage is untrimmed and is typicay 6. A Schottky diode in the coector of each NPN transistor of the NPN input stage aows the LT9A/LT9A to operate with either or both of their inputs above. At about.3 above the NPN input transistor is fuy saturated and the input bias current is typicay 3 at room temperature. The input offset votage is typicay 7 when operating above. The LT9A/LT9A wi operate with their inputs above regardess of. LT9A/LT9A The inputs are protected against excursions as much as 5 beow by an interna k resistor in series with each input and a diode from the input to the negative suppy. There is no output phase reversa for inputs up to 5 beow. There are no camping diodes between the inputs and the maximum differentia input votage is. Output The output votage swing of the LT9A/LT9A is affected by input overdrive as shown in the typica performance curves. The output of the LT9A/LT9A can be pued up to beyond with ess than na of eakage current, provided that is ess than.5. The normay reverse-biased substrate diode from the output to wi cause unimited currents to fow when the output is forced beow. If the current is transient and imited to ma, no damage wi occur. The LT9A/LT9A are internay compensated to drive at east pf of capacitance under any output oading conditions. A.μF capacitor in series with a 5Ω resistor between the output and ground wi compensate these ampifiers for arger capacitive oads, up to,pf, at a output currents. Distortion There are two main contributors of distortion in op amps: output crossover distortion as the output transitions from sourcing to sinking current and distortion caused by noninear common mode rejection. Of course, if the op amp is operating inverting there is no common mode induced distortion. When the LT9A/LT9A switch between input stages there is significant noninearity in the CMRR. Lower oad resistance increases the output crossover distortion, but has no effect on the input stage transition distortion. For owest distortion the LT9A/ LT9A shoud be operated singe suppy, with the output aways sourcing current and with the input votage swing between ground and (.). See the Typica Performance Characteristics curves. 9afd

12 LT9A/LT9A APPLICATIONS INFORMATION Gain The open-oop gain is amost independent of oad when the output is sourcing current. This optimizes performance in singe suppy appications where the oad is returned to ground. The typica performance photo of Open-Loop Gain for various oads shows the detais. ICAL APPLICATIONS Square Wave Osciator Optiona Output Compensation for Capacitive Loads Greater Than pf 5 k k 59k / LT9A R 5k OUT IN / LT9A.μF C L,pF C.μF 9A TA 5Ω 9A TA f = RC OUT = 5 P-P WITH 5 SUPPLY I S = AT S = 5, R = 5k, C = nf OUTPUT IS 5kHz SLEW LIMITED TRIANGLE WAE SIMPLIFIED SCHEMATIC Q D D Q D3 Q3 Q R 3k Q IN R k Q7 Q9 Q IN R3 k Q7 Q Q Q Q5 Q6 Q OUT Q9 Q Q3 Q Q Q5 ONE AMPLIFIER Q6 D D5 R k R5 k 9A SS 9afd

13 PACKAGE DESCRIPTION Pease refer to for the most recent package drawings. DD Package -Lead Pastic DFN (3mm 3mm) (Reference LTC DWG # Rev C) LT9A/LT9A R = PIN TOP MARK (NOTE 6). REF 3.. ( SIDES) ( SIDES) BOTTOM IEW EXPOSED PAD NOTE:. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M-9 ARIATION OF (WEED-). 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.5mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN LOCATION ON TOP AND BOTTOM OF PACKAGE.5 BSC ( SIDES) PACKAGE OUTLINE (DD) DFN 59 RE C BSC.3.5 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED MS Package -Lead Pastic MSOP (Reference LTC DWG # Rev F) 3.. (..) (NOTE 3) (.5) REF 5.3 (.6) MIN..3 (.65.5).9.7 (.35.5) (.6.36).65 (.56) BSC GAUGE PLANE. (.7).5 (.) DETAIL A DETAIL A (..6) RECOMMENDED SOLDER PAD LAYOUT SEATING PLANE NOTE:. DIMENSIONS IN MILLIMETER/(INCH). DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED.5mm (.6") PER SIDE. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED.5mm (.6") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE.mm (.") MAX.9.5 (.93.6). (.3) MAX..3 (.9.5).65 (.56) BSC (..) (NOTE ).6 (.3) REF.6.5 (..) MSOP (MS) 37 RE F 9afd 3

14 LT9A/LT9A PACKAGE DESCRIPTION Pease refer to for the most recent package drawings. N Package -Lead PDIP (Narrow.3 Inch) (Reference LTC DWG # 5--5 Rev I).3.35 (7.6.55).5.65 (.3.65).3.5 (3.3.7).* (.6) MAX (.3.3) (.65). (.5) BSC NOTE: INCHES. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED. INCH (.5mm). (3.) MIN..3 (.57.76). (.5) MIN.55.5* (6.77.3) 3 N RE I 7 S Package -Lead Pastic Sma Outine (Narrow.5 Inch) (Reference LTC DWG # 5--6).5 BSC (. 5.) NOTE MIN ( ).5.57 (3. 3.9) NOTE RECOMMENDED SOLDER PAD LAYOUT 3.. (.3.5).. 5 (.5.5) (.36.75).. (..5).6.5 (.6.7) NOTE: INCHES. DIMENSIONS IN (MILLIMETERS)..9 (.355.3). DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED.6" (.5mm).5 (.7) BSC SO 33 9afd

15 PACKAGE DESCRIPTION Pease refer to for the most recent package drawings. N Package -Lead PDIP (Narrow.3 Inch) (Reference LTC DWG # 5--5 Rev I) LT9A/LT9A.77* (9.55) MAX ±.5* (6.77 ±.3) (7.6.55).3 ±.5 (3.3 ±.7).5.65 (.3.65)..5 (.3.3) (.5) MIN. (3.) MIN.5 (.7) MIN NOTE: INCHES. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED. INCH (.5mm). (.5) BSC.65 (.65). ±.3 (.57 ±.76) N RE I 7 S Package -Lead Pastic Sma Outine (Narrow.5 Inch) (Reference LTC DWG # 5--6).5 BSC.5 ± (.56.73) NOTE 3 N MIN 3 N/.6 ±.5.. ( ) N N/.5.57 (3. 3.9) NOTE 3.3 ±.5 RECOMMENDED SOLDER PAD LAYOUT (.3.5).. 5 (.5.5) (.36.75).. (..5) (.6.7) (.355.3) NOTE: INCHES. DIMENSIONS IN (MILLIMETERS). DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED.6" (.5mm).5 (.7) BSC S 5 9afd 5

16 LT9A/LT9A PACKAGE DESCRIPTION Pease refer to for the most recent package drawings. DHC Package 6-Lead Pastic DFN (5mm 3mm) (Reference LTC DWG # 5--76) ( SIDES) PACKAGE OUTLINE..5 ( SIDES) BSC RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 5.. ( SIDES) R =. 9 R = PIN TOP MARK (SEE NOTE 6). REF 3.. ( SIDES) ( SIDES)..5 NOTE:. DRAWING PROPOSED TO BE MADE ARIATION OF ERSION (WJED-) IN JEDEC PACKAGE OUTLINE MO-9. 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.5mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN LOCATION ON THE TOP AND BOTTOM OF PACKAGE.. ( SIDES) BSC BOTTOM IEW EXPOSED PAD PIN NOTCH (DHC6) DFN 3 6 9afd

17 LT9A/LT9A REISION HISTORY (Revision history begins at Rev C) RE DATE DESCRIPTION PAGE NUMBER C / Changed units from m to for O in Eectrica Characteristics Updated package drawings D / Revised Order Information 3 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. 9afd 7

18 LT9A/LT9A ICAL APPLICATION Ring-Tone Generator 6 R 7k R6 k R 33k 3 / LT9A C μf R.6M CADENCE OSCILLATOR R3 k C.7μF D N R5 k 5 6 R 6k R6 k / LT9A R7 6k 7 Hz OSCILLATOR R9 3k R k C.6μF R 6k 9 C3.7μF / LT9A SMOOTHING FILTER C5.μF R k R3 3k 3 R k R5 7k Q IRF6 / LT9A R Z 5 k C7 7μF Q3 N39 R7 6Ω R Ω R3.7k R5.7k R6 k Q5 N39 OPTO* *LED OF OPTO ILLUMINATES WHEN THE PHONE IS OFF THE HOOK SEE DESIGN NOTE DN3 FOR A DISCUSSION OF THE CIRCUIT Q IRF96 POWER AMPLIFIER Z 5 R k R9 6Ω Q N396 LOAD R 5Ω C6.33μF 9A TA3 UP TO TEN PHONES RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT366/LT367 Dua/Quad Precision, Rai-to-Rai Input and Output Op Amps 75 OS(MAX), 5/m A OL(MIN), khz GBW LT636 LT63/LT639 LT7 LT73 Singe Over-The-Top Micropower Rai-to-Rai Input and Output Op Amp Dua/Quad.MHz Over-The-Top Micropower, Rai-to-Rai Input and Output Op Amps Micropower, Over-The-Top, SOT-3, Rai-to-Rai Input and Output Op Amp.MHz, Over-The-Top, Micropower, Rai-to-Rai Input and Output Op Amp 55 Suppy Current, CM Extends Above EE, Independent of CC, MSOP Package, Shutdown Function./μs Sew Rate, 3 Suppy Current per Ampifier SOT-3, OS(MAX), I S = 55 (Max), Gain-Bandwidth = khz, Shutdown Pin SOT-3, OS(MAX), I S = 3 (Max), Gain-Bandwidth =.MHz, Shutdown Pin 9afd LT RE D PRINTED IN USA Linear Technoogy Corporation 63 McCarthy Bvd., Mipitas, CA () 3-9 FAX: () LINEAR TECHNOLOGY CORPORATION