FEATURES APPLICATIONS TYPICAL APPLICATION LT1466L/LT1467L Micropower Dual/Quad Precision Rail-to-Rail Input and Output Op Amps

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1 Micropower Dual/Quad Precision Rail-to-Rail Input and Output Op Amps FEATRES Rail-to-Rail Input and Output Low Supply Current: 75µA Max 39µV V OS(MAX) for V CM = V to V + High Common Mode Rejection Ratio: 83dB Min High A VOL : 4V/mV Min Wide Supply Range: 2V to ±5V Low Input Bias Current: 6nA Typ 2kHz Gain Bandwidth Product APPLICATIONS Supply Current Sensing Driving A/D Converters Test Equipment Amplifiers DESCRIPTION The LT 466L/LT467L are dual/quad bipolar op amps that combine rail-to-rail input and output operation with precision specifications. sing a patented technique, both input stages of the are trimmed: one at the negative supply and the other at the positive supply. The resulting common mode rejection of 83dB minimum is much better than other rail-to-rail input op amps. A minimum open-loop gain of 4V/mV into a k load virtually eliminates all gain error. Operation is specified for 3V, 5V and ±5V supplies. nlike other rail-to-rail amplifiers, the input offset voltage of 39µV maximum is guaranteed across the entire rail-torail input range, not just at half supply. The graph below contrasts the V OS specifications of the to a competitive part that is specified only at half supply. As can be seen, the s limits are much tighter for inputs near either supply. The LT466L is available in 8-lead PDIP and SO-8 packages with the standard dual pinout. The LT467L features the standard quad pinout and is available in a 6-lead narrow SO package., LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION Variable Current Source Worst-Case V OS vs Input Common Mode Voltage V IN V TO 2.5V + /2 LT466L VN2222 k /2 LT466L R2 k R k V CC R3 5.Ω + ( )( R3 ) ( ) 466L/67L R2 I O = V IN R = V IN 5Ω TP6 I O TA INPT OFFSET VOLTAGE (µv) 2 2 TYPICAL RAIL-TO-RAIL AMPLIFIER (65dB CMRR) LT467L LIMITS INPT COMMON MODE VOLTAGE (V) 466L/67L TA2

2 ABSOLTE MAXIMM RATINGS W W W Supply Voltage... ±8V Input Current... ±5mA Output Short-Circuit Duration (Note )...Continuous Specified Temperature Range... C to 7 C Junction Temperature... 5 C Storage Temperature Range C to 5 C Lead Temperature (Soldering, sec)... 3 C PACKAGE/ORDER INFORMATION OT A IN A 2 +IN A 3 V 4 A N8 PACKAGE 8-LEAD PDIP TOP VIEW 8 V + 7 OT B 6 IN B B 5 +IN B S8 PACKAGE 8-LEAD PLASTIC SO T JMAX = 5 C, θ JA = 3 C/ W (N) T JMAX = 5 C, θ JA = 9 C/ W (S) W ORDER PART NMBER LT466LCN8 LT466LCS8 S8 PART MARKING 466L OT A IN A 2 +IN A 3 V + 4 +IN B 5 IN B 6 OT B 7 NC 8 A B TOP VIEW 6 OT D 5 IN D 4 +IN D 3 V 2 +IN C IN C OT C 9 NC S PACKAGE 6-LEAD PLASTIC SO T JMAX = 5 C, θ JA = 5 C/ W D C ORDER PART NMBER LT467LCS Consult factory for Industrial and Military grade parts. ELECTRICAL CHARACTERISTICS, V S = 5V, V; V S = 3V, V; V CM = V O = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OS Input Offset Voltage V CM = V + 39 µv V CM = V 39 µv V OS Input Offset Voltage Shift V CM = V to V µv Input Offset Voltage Match V CM = V, V + (Notes 3, 4) 5 55 µv (Channel-to-Channel) I B Input Bias Current V CM = V na V CM = V 4 6 na I B Input Bias Current Shift V CM = V to V na I OS Input Offset Current V CM = V na V CM = V na I OS Input Offset Current Shift V CM = V to V na Input Bias Current Match V CM = V + (Note 4).6 5. na (Channel-to-Channel) V CM = V (Note 4).6 5. na e n Input Noise Voltage Density f = khz 45 nv/ Hz i n Input Noise Current Density f = khz.5 pa/ Hz A VOL Large-Signal Voltage Gain V S = 5V, V O =.5V to 4.4V, R L = k 4 5 V/mV V S = 3V, V O =.5V to 2.4V, R L = k 25 V/mV 2

3 ELECTRICAL CHARACTERISTICS, V S = 5V, V; V S = 3V, V; V CM = V O = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS CMRR Common Mode Rejection Ratio V CM = V to V +, V S = 5V db CMRR Match (Channel-to-Channel) V CM = V to V +, V S = 5V (Note 4) 8 93 db PSRR Power Supply Rejection Ratio V S = 2.3V to 2V, V CM = V O =.5V 9 5 db PSRR Match (Channel-to-Channel) V S = 2.3V to 2V, V CM = V O =.5V (Note 4) 84 5 db V OL Output Voltage Swing LOW No Load 32 6 mv I SINK =.5mA mv I SINK = 2.5mA mv V OH Output Voltage Swing HIGH No Load V +.52 V +.26 V I SORCE =.5mA V +.27 V +.35 V I SORCE = 2.5mA V +.57 V V I SC Short-Circuit Current 7 ma I S Supply Current per Amplifier 6 75 µa C T A 7 C, V S = 5V, V; V S = 3V, V; V CM = V O = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OS Input Offset Voltage V CM = V µv V CM = V µv V OS TC Input Offset Voltage Drift (Note 2) 2 7 µv/ C V OS Input Offset Voltage Shift V CM = V to V µv Input Offset Voltage Match V CM = V, V + (Notes 3, 4) µv (Channel-to-Channel) I B Input Bias Current V CM = V na V CM = V 6 8 na I B Input Bias Current Shift V CM = V to V na I OS Input Offset Current V CM = V na V CM = V na I OS Input Offset Current Shift V CM = V to V na Input Bias Current Match V CM = V + (Note 4) na (Channel-to-Channel) V CM = V (Note 4) na A VOL Large-Signal Voltage Gain V S = 5V, V O =.5V to 4.4V, R L = k 5 V/mV V S = 3V, V O =.5V to 2.4V, R L = k 7 4 V/mV CMRR Common Mode Rejection Ratio V CM = V to V +, V S = 5V 8 96 db CMRR Match (Channel-to-Channel) V CM = V to V +, V S = 5V (Note 4) db PSRR Power Supply Rejection Ratio V S = 2.3V to 2V, V CM = V O =.5V 8 5 db PSRR Match (Channel-to-Channel) V S = 2.3V to 2V, V CM = V O =.5V (Note 4) 8 5 db V OL Output Voltage Swing LOW No Load 42 8 mv I SINK =.5mA 5 3 mv I SINK = 2.5mA mv V OH Output Voltage Swing HIGH No Load V +.65 V +.33 V I SORCE =.5mA V +.35 V +.55 V I SORCE = 2.5mA V +.62 V +.3 V I SC Short-Circuit Current 7 6 ma I S Supply Current per Amplifier 7 85 µa 3

4 ELECTRICAL CHARACTERISTICS, V S = ±5V, V CM = V O = V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OS Input Offset Voltage V CM = V µv V CM = V µv V OS Input Offset Voltage Shift V CM = V to V µv Input Offset Voltage Match V CM = V, V + (Notes 3, 4) µv (Channel-to-Channel) I B Input Bias Current V CM = V na V CM = V 4 6 na I B Input Bias Current Shift V CM = V to V na I OS Input Offset Current V CM = V na V CM = V na I OS Input Offset Current Shift V CM = V to V na Input Bias Current Match V CM = V + (Note 4).6 5. na (Channel-to-Channel) V CM = V (Note 4).6 5. na A VOL Large-Signal Voltage Gain V O = ±4.25V, R L = k V/mV Channel Separation V O = ±4.25V, R L = k 2 3 db SR Slew Rate A V =, R L =.8.4 V/µs CMRR Common Mode Rejection Ratio V CM = V to V db CMRR Match (Channel-to-Channel) V CM = V to V + (Note 4) db V OL Output Voltage Swing LOW No Load V +.32 V +.6 V I SINK =.5mA V +.35 V +.27 V I SINK = 2.5mA V V +.47 V V OH Output Voltage Swing HIGH No Load V +.52 V +.26 V I SORCE =.5mA V +.27 V +.35 V I SORCE = 2.5mA V +.57 V V I SC Short-Circuit Current 8 ma I S Supply Current per Amplifier 7 8 µa GBW Gain Bandwidth Product f = khz 2 khz C T A 7 C, V S = ±5V, V CM = V O = V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OS Input Offset Voltage V CM = V µv V CM = V 5 66 µv V OS Input Offset Voltage Shift V CM = V to V µv Input Offset Voltage Match V CM = V, V + (Notes 3, 4) 8 9 µv (Channel-to-Channel) I B Input Bias Current V CM = V na V CM = V 6 8 na I B Input Bias Current Shift V CM = V to V na I OS Input Offset Current V CM = V na V CM = V na I OS Input Offset Current Shift V CM = V to V na Input Bias Current Match V CM = V + (Note 4) na (Channel-to-Channel) V CM = V (Note 4) na A VOL Large-Signal Voltage Gain V O = ±4.25V, R L = k 25 V/mV Channel Separation V O = ±4.25V, R L = k 2 3 db CMRR Common Mode Rejection Ratio V CM = V to V + 86 db CMRR Match (Channel-to-Channel) V CM = V to V + (Note 4) 8 98 db 4

5 ELECTRICAL CHARACTERISTICS C T A 7 C, V S = ±5V, V CM = V O = V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OL Output Voltage Swing LOW No Load V +.42 V +.8 V I SINK =.5mA V +.5 V +.3 V I SINK = 2.5mA V +.27 V +.54 V V OH Output Voltage Swing HIGH No Load V +.65 V +.33 V I SORCE =.5mA V +.35 V +.55 V I SORCE = 2.5mA V +.62 V +.3 V I SC Short-Circuit Current 7 8 ma I S Supply Current per Amplifier 7 9 µa The denotes specifications which apply over the full operating temperature range. Note : A heat sink may be required to keep the junction temperature below the Absolute Maximum Rating when the output is shorted indefinitely. Note 2: This parameter is not % tested. Note 3: Input offset match is the difference in offset voltage between amplifiers measured at both V CM = V and V CM = V +. Note 4: Matching parameters are the difference between amplifiers A and D and between B and C. TYPICAL PERFORMANCE CHARACTERISTICS W 25 2 V OS Distribution, V CM = V V S = 5V, V V CM = V 9 AMPLIFIERS 25 2 V OS Distribution, V CM = 5V V S = 5V, V V CM = 5V 9 AMPLIFIERS 25 2 V OS Shift, V CM = V to 5V V S = 5V, V V CM = V TO 5V 9 AMPLIFIERS PERCENT OF NITS (%) 5 PERCENT OF NITS (%) 5 PERCENT OF NITS (%) INPT OFFSET VOLTAGE (µv) INPT OFFSET VOLTAGE (µv) INPT OFFSET VOLTAGE SHIFT (µv) 466L/67L G 466L/67L G2 466L/67L G3 5

6 TYPICAL PERFORMANCE CHARACTERISTICS W SPPLY CRRENT PER AMPLIFIER (µa) Supply Current vs Temperature 8 7 V S = ±5V 6 V S = 5V, V CHANGE IN OFFSET VOLTAGE (µv) Minimum Supply Voltage T A = 4 C T A = 85 C INPT BIAS CRRENT (na) Input Bias Current vs Common Mode Voltage V S = 5V, V T A = 85 C T A = 4 C T A = 85 C TEMPERATRE ( C) TOTAL SPPLY VOLTAGE (V) COMMON MODE VOLTAGE (V) 466L/67L G4 466L/67L G5 466L/67L G6 Output Saturation Voltage vs Load Current (Output Low) Output Saturation Voltage vs Load Current (Output High).Hz to Hz Output Voltage Noise V CM = V SATRATION VOLTAGE (mv) T A = 85 C T A = 4 C SATRATION VOLTAGE (mv) T A = 85 C T A = 4 C OTPT VOLTAGE (µv/div)... LOAD CRRENT (ma)... LOAD CRRENT (ma) TIME (s/div) 466L/67L G7 466L/67L G8 466L/67L G9 VOLTAGE NOISE (nv/ Hz) Voltage Noise Spectrum 2 VS = 5V, V V CM = 2.5V 6 V CM = 4V 4 2 FREQENCY (Hz) 466L/67L G CRRENT NOISE (pa/ Hz) Current Noise Spectrum Gain and Phase Shift vs Frequency 2. VS = 5V, V V CM = 4V V CM = 2.5V VOLTAGE GAIN (db) PHASE GAIN FREQENCY (Hz) FREQENCY (khz) 466L/67L G 466L/67L G2 PHASE SHIFT (DEG) 6

7 TYPICAL PERFORMANCE CHARACTERISTICS W FREQENCY (khz) Gain Bandwidth and Phase Margin vs Supply Voltage GBW PHASE MARGIN 5 5 SPPLY VOLTAGE (V) 466L/67L G PHASE MARGIN (DEG) COMMON MODE REJECTION RATIO (db) Common Mode Rejection Ratio vs Frequency FREQENCY (khz) 466L/67L G4 POWER SPPLY REJECTION RATIO (db) Power Supply Rejection Ratio vs Frequency NEGATIVE SPPLY POSITIVE SPPLY FREQENCY (khz) 466L/67L G5 OTPT IMPEDANCE (Ω) Closed-Loop Output Impedance vs Frequency Capacitive Load Handling Voltage Gain, V S = ±5V A V = A V = FREQENCY (Hz) 466L/67 G6 OVERSHOOT (%) A V = A V = 5 A V = CAPACITIVE LOAD (pf) 466L/67L G7 CHANGE IN OFFSET VOLTAGE (µv) OTPT VOLTAGE (V) R L = k R L = 2k V S = ±5V 466L/67L G8 CHANGE IN OFFSET VOLTAGE (µv) Voltage Gain, V S = 5V, V R L = k R L = 2k V S = 5V, V OTPT VOLTAGE (V) 6 466L/67L G9 CHANGE IN OFFSET VOLTAGE (µv) Input Offset Drift vs Time V S = ±5V TIME AFTER POWER-P (SEC) 466L/67L G2 OTPT SATRATION VOLTAGE (mv) Output Saturation Voltage vs Input Overdrive NO LOAD OTPT HIGH, OTPT LOW INPT OVERDRIVE (mv) 466L/67/ G2 7

TYPICAL PERFORMANCE CHARACTERISTICS CHANNEL SEPARATION (db) 3 2 9 8 7 6 5 4 3 W Channel Separation vs Frequency V S = ±5V k k k FREQENCY (Hz) 466L/67L G24 Small-Signal Response A V = 466L/67L G22

8 TYPICAL PERFORMANCE CHARACTERISTICS CHANNEL SEPARATION (db) W Channel Separation vs Frequency V S = ±5V k k k FREQENCY (Hz) 466L/67L G24 Small-Signal Response A V = 466L/67L G22 Large-Signal Response V S = ±5V V S = ±5V A V = 466L/67L G23 APPLICATIONS INFORMATION Rail-to-Rail Operation W The differ from conventional op amps in the design of both the input and output stages. Figure shows a simplified schematic. The input stage consists of two differential amplifiers, a PNP stage Q-Q2 and an NPN stage Q3-Q4, that are active over different portions of the input common mode range. Each input stage is trimmed for offset voltage. A complementary output configuration (Q2-Q3) is employed to create an output stage with railto-rail swing. The devices are fabricated on Linear Technology s proprietary complementary bipolar process, which ensures very similar DC and AC characteristics for the output devices Q2 and Q3. First, looking at the input stage, Q5 switches the current from current source I between the two input stages. When the input common mode voltage V CM is near the negative supply, Q5 is reverse biased, so the current from I becomes the tail current for the PNP differential pair Q-Q2. At the other extreme, when V CM is near the positive supply, the PNPs Q-Q2 are biased off. The current from V + I Q5 V BIAS Q Q C C V C Q2 +IN V + OT IN Q3 Q4 Q Q2 Q7 BFFER AND OTPT BIAS Q8 Q9 C2 Q6 Q3 V D 466L/67L F 8 Figure. Simplified Schematic

9 APPLICATIONS INFORMATION W I then flows through Q5 to the current mirror D3-Q6, furnishing the tail current for the NPN differential pair Q3-Q4. The switchover point between stages occurs when V CM is equal to the base voltage of Q5, which is biased approximately.3v below the positive supply. The collector currents of the two input pairs are combined in the second stage, consisting of Q7-Q. Most of the voltage gain in the amplifier is contained in this stage. The output of the second stage is buffered and applied to the output devices Q2 and Q3. Capacitors C and C2 form local feedback loops around the output devices, lowering the output impedance at high frequencies. Capacitor C C sets the amplifier bandwidth. Input Offset Voltage Since the amplifier has two input stages, the input offset voltage changes depending upon which stage is active. When the amplifier switches between stages, the offset voltage may go up, down or remain flat. Both stages of the are trimmed; one at the negative supply and the other at the positive supply. The resulting common mode rejection ratio of 83dB minimum is much better than typical rail-to-rail amplifiers. Overdrive Protection The contain circuits that prevent the output from reversing polarity when the input voltage exceeds either supply. For these circuits to work properly, the input current should be limited to ma when the input is below the negative supply, and.5ma when the input is above the positive supply. If the amplifier is to be severely overdriven, an external resistor should be used to limit the current. Output The output voltage swing and current sinking capability of the are affected by input overdrive as shown in the Typical Performance Characteristics. When monitoring voltages within mv of either rail, gain should be taken to keep the output from clipping. 9

10 PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. N8 Package 8-Lead PDIP (Narrow.3) (LTC DWG # 5-8-5).4* (.6) MAX ±.5* (6.477 ±.38) ( ) (.43.65).3 ±.5 (3.32 ±.27).9.5 ( ) ( ).65 (.65) TYP.5 (.27) MIN. ±. (2.54 ±.254) *THESE DIMENSIONS DO NOT INCLDE MOLD FLASH OR PROTRSIONS. MOLD FLASH OR PROTRSIONS SHALL NOT EXCEED. INCH (.254mm).25 (3.75) MIN.8 ±.3 (.457 ±.76).5 (.38) MIN N8 695 S8 Package 8-Lead Plastic Small Outline (Narrow.5) (LTC DWG # 5-8-6).89.97* ( ) ( ).5.57** ( ) ( )..2 ( ) 45 8 TYP ( ).4. (..254) ( ) *DIMENSION DOES NOT INCLDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED.6" (.52mm) PER SIDE ** DIMENSION DOES NOT INCLDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED." (.254mm) PER SIDE.5 (.27) TYP SO8 996

11 PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. S Package 6-Lead Plastic Small Outline (Narrow.5) (LTC DWG # 5-8-6) * (9.84.8) ( ).5.57** ( )..2 ( ) ( ) 8 TYP ( ) (..254) *DIMENSION DOES NOT INCLDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED.6" (.52mm) PER SIDE ** DIMENSION DOES NOT INCLDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED." (.254mm) PER SIDE.4.9 ( ).5 (.27) TYP S6 695 Information furnished by Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

12 TYPICAL APPLICATIONS N 4-Pole,kHz, 3.3V Single Supply State Variable Filter sing the LT467L V IN 3.3V R* 29.5k C,pF A /4 LT467L + k R2* 8.6k 29.5k* k µf C2,pF A2 /4 LT467L +.8k*,pF A3 /4 LT467L + ω 2 = 2.5k*.8k* (R)(C)(R2)(C2) R = ω Q(C) R2 = Q ω (C2) +,pf A4 /4 LT467L V OT *% RESISTORS 466L/67L TA3 Frequency Response of 4th Order Butterworth Filter GAIN 2 GAIN (db) k FREQENCY (Hz) 466L/67L TA4 k RELATED PARTS PART NMBER DESCRIPTION COMMENTS LTC 52 Rail-to-Rail Input and Output, Zero-Drift Op Amp High DC Accuracy, µv V OS(MAX), nv/ C Drift,.7MHz GBW,.5V/µs Slew Rate, Maximum Supply Current 3mA LT366/LT367 Dual/Quad Precision, Rail-to-Rail Input and Output 475µV V OS(MAX), 4kHz GBW,.3V/µs Slew Rate, Op Amps Maximum Supply Current 52µA per Op Amp LT498 /LT499 Dual/Quad, MHz Rail-to-Rail Input and High Speed, 5V/µs Slew Rate, 475µV V OS(MAX) from V + to V, Output Op Amps Max Supply Current 2.2mA per Op Amp 2 Linear Technology Corporation 63 McCarthy Blvd., Milpitas, CA (48) FAX: (48) TELEX: l7lf LT/TP 697 5K PRINTED IN SA LINEAR TECHNOLOGY CORPORATION 997

DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION. LT1498/LT MHz, 6V/µs, Dual/Quad Rail-to-Rail Input and Output Precision C-Load Op Amps

DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION. LT1498/LT MHz, 6V/µs, Dual/Quad Rail-to-Rail Input and Output Precision C-Load Op Amps MHz, 6V/µs, Dual/Quad Rail-to-Rail Input and Output Precision C-Load Op Amps FEATRES Rail-to-Rail Input and Output 475µV Max V OS from V + to V Gain-Bandwidth Product: MHz Slew Rate: 6V/µs Low Supply Current