SE = 16-Pin Small SO IN V+

Transcription

1 190942; Rev 3; 5/10 General Description The family of monolithic CMOS op amps combine ultralow input current with lowpower operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages. The ultralow bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA Hz and an input impedance of Ω ensure optimum performance with very high source impedances in such applications as ph meters and photodiode amplifiers. BatteryPowered Instruments LowLeakage Amplifiers LongTime Constant Integrators LowFrequency Active Filters Hearing Aids and Microphone Amplifiers Low Droop Rate Sample/Hold Amplifiers Picoammeters Applications Pin Configuration Single/Dual/Triple/Quad Features PinforPin Second Source 1pA Typical Bias Current 4nA (max) at ±1V to ±8V Wide Supply Voltage Range IndustryStandard Pinouts Programmable Quiescent Currents of 10µA, 100µA, and 1000µA Monolithic, LowPower CMOS Design Ordering Information ICL76XX M N OP V OS SELECTION A = 2mV B = 5mV C = 10mV TEMP RANGE C = 0 C to 70 C E = 40 C to 85 C M = 55 C to PKG CODE TV= 8Pin TO 99 PA = 8Pin Plastic Dip SA = 8Pin Small SO TOP VIEW OFFSET SINGLES ICL7611/12/14/16 TO 99 (I OSET)* V D = 15mV E = 20mV JD = 14Pin CERDIP PD = 14Pin Plastic Dip IN 2 IN 3 4 V *PIN 7 CONNECTED TO CASE 5 6 OUTPUT OFFSET SD = 14Pin Small SO JE = 16Pin CERDIP 8PIN DIP PE = 16Pin Plastic Dip OFFSET 1 8 (I OSET)* SE = 16Pin Small SO IN V IN OUT WE 16Pin Wide SO V 4 5 OFFSET *EXTERNAL COMPENSATION (ICL7614) Typical Operating Circuit appears at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 Ordering Information (continued) ICL7611 ICL7612 ICL7614 ICL7616 ICL7621 ICL7622 ICL7631 ICL7632 ICL7641 Compensated X X X X X X X X Externally Compensated Extended CMVR Offset null capability X X X X X X X X Programmable I Q X X X X X Fixed I Q 10µA Fixed I Q 100µA Fixed I Q 1mA X X X X ICL7642 X Ordering Information (Single/Dual) PART TEMP RANGE PINPACKAGE ICL761XACPA 0 C to 8 Plastic Dip ICL761XACSA 0 C to 8 Slim SO ICL761XACTV 0 C to TO99 Metal Can ICL761XAMTV 55 C to TO99 Metal Can ICL761XBCPA 0 C to 8 Plastic Dip ICL761XBCSA 0 C to 8 Slim SO ICL761XBCTV 0 C to TO99 Metal Can ICL761XBESA 40 C to 85 C 8 Slim SO ICL761XBMTV 55 C to TO99 Metal Can ICL761XDCPA 0 C to 8 Plastic Dip ICL761XDCSA 0 C to 8 Slim SO ICL761XDCTV 0 C to TO99 Metal Can ICL761XDESA 40 C to 85 C 8 Slim SO ICL7621ACPA 0 C to 8 Plastic Dip ICL7621ACSA 0 C to 8 Slim SO ICL7621ACTV 0 C to TO99 Metal Can ICL7621AMTV 55 C to TO99 Metal Can ICL7621BCPA 0 C to 8 Plastic Dip Note: X above is replaced by: 1, 2, 4, 8. PART TEMP RANGE PINPACKAGE ICL7621BCSA 0 C to 8 Slim SO ICL7621BCTV 0 C to TO99 Metal Can ICL7621BMTV 55 C to TO99 Metal Can ICL7621DCPA 0 C to 8 Plastic Dip ICL7621DCSA 0 C to 8 Slim SO ICL7621DCTV 0 C to TO99 Metal Can ICL7622ACPD 0 C to 14 Plastic Dip ICL7622ACSD 0 C to 14 Slim SO ICL7622ACJD 0 C to 14 CERDIP ICL7622AMJD 55 C to 14 CERDIP ICL7622BCPD 0 C to 14 Plastic Dip ICL7622BCSA 0 C to 14 Slim SO ICL7622BCJD 0 C to 14 CERDIP ICL7622BMJD 55 C to 14 CERDIP ICL7622DCPD 0 C to 14 Plastic Dip ICL7622DCSD 0 C to 14 Slim SO ICL7622DCJD 0 C to 14 CERDIP 2

3 TOP VIEW OFFSET IN SINGLES ICL7611/12/14/16 TO 99 2 IN 1 3 (I OSET)* 8 4 V 7 5 V *PIN 7 CONNECTED TO CASE 6 OUTPUT OFFSET OUT A IN A 2 IN A DUALS ICL7621/22 TO V 8 4 V 7 5 OUT B 6 IN B IN B Pin Configurations INA 1 14 LEAD INA V 2 A OFFSETA OFFSETA OUTA V 4 11 N.C. 8 LEAD 8 LEAD OFFSET 1 8 (I OSET)* IN V 2 7 OUTA INA 1 2 A 8 7 V OUTB OFFSETB 5 10 INB 6 B 9 OUTB V IN 3 6 OUT INA 3 B 6 INB INB 7 8 OFFSETB V 4 5 OFFSET V 4 5 INB NOTE: PINS 9 & 13 ARE INTERNALLY CONNECTED *EXTERNAL COMPENSATION (ICL7614) 3

4 ABSOLUTE MAXIMUM RATINGS (Single/Dual) Total Supply Voltage (V to V)...18V Input Voltage...(V 0.3V) to (V 0.3V) Differential Input Voltage (Note 1)...±(V 0.3V) to (V 0.3V) Duration of Output Short Circuit (Note 2)...Unlimited Continuous Power Dissipation (T A = 25 C) TO99 Metal Can (derate 2mW/ C above 25 C)...250mW 8Pin Minidip (derate 2mW/ C above 25 C)...250mW 14Pin Plastic (derate 3mW/ C above 25 C)...375mW 14Pin CERDIP (derate 4mW/ C above 25 C)...500mW 16Pin Plastic (derate 3mW/ C above 25 C)...375mW 16Pin CERDIP (derate 4mW/ C above 25 C)...500mW Operating Temperature Ranges: M Series...55 C to E Series...40 C to 85 C C Series...0 C to Storage Temperature Range...55 C to 150 C Lead Temperature (soldering, 10s) C Soldering Temperature (reflow) Lead(Pb)Free Packages C Packages Containing Lead C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note 1: Longterm offset voltage stability will be degraded if large input differential voltages are applied for long periods of time. Note 2: The outputs may be shorted to ground or to either supply for V SUPP 10V. Care must be taken to insure that the dissipation rating is not exceeded. ELECTRICAL CHARACTERISTICS (Single/Dual) (V SUPP = ±1.0V, 10µA, T A = 25 C, unless otherwise noted.) ICL76XXA ICL76XXB MIN TYP MAX MIN TYP MAX T A = 25 C 2 5 Input Offset Voltage V OS T MIN T MAX 3 7 UNITS Temperature ΔV OS /ΔT R S 100kΩ µv/ C Coefficient of V OS T A = 25 C Input Offset Current I OS pa 0 C mv T A = 25 C Input Bias Current I BIAS 0 C pa CommonMode Voltage Range (Except ICL7612/ ICL7616) Extended Common Mode Voltage Range (ICL7612 Only) Extended Common Mode Voltage Range (ICL7616 Only) V CMR V V CMR V V CMR 10µA V R L = 1MΩ, T A = 25 C ±0.98 ±0.98 Output Voltage Swing V OUT RL = 1MΩ, 0 C ±0.96 ±0.96 V 4

5 ELECTRICAL CHARACTERISTICS (Single/Dual) (continued) (V SUPP = ±1.0V, 10µA, T A = 25 C, unless otherwise noted.) LargeSignal Voltage Gain UnityGain Bandwidth A VOL V O = ±0.1V, R L = 1MΩ, T A = 25 C V O = ±0.1V, R L = 1MΩ, 0 C ICL76XXA ICL76XXB MIN TYP MAX MIN TYP MAX UNITS GBW MHz Input Resistance R IN Ω CommonMode Rejection Ratio PowerSupply Rejection Ratio InputReferred Noise Voltage InputReferred Noise Current Supply Current (Per Amplifier) Slew Rate CMRR R S 100kΩ db PSRR R S 100kΩ db e n R S = 100Ω, f = 1kHz nv/ Hz i n R S = 100Ω, f = 1kHz pa/ Hz I SUPP No signal, no load µa SR A VOL = 1, C L = 100pF, V IN = 0.2V PP, R L = 1MΩ Rise Time t r V IN = 50mV, C L = 100pF, R L = 1MΩ Overshoot Factor V IN = 50mV, C L = 100pF, R L = 1MΩ ELECTRICAL CHARACTERISTICS (Single/Dual) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) db V/µs µs 5 5 % Input Offset Voltage V OS T A = 25 C ICL76XXA ICL76XXB ICL76XXD MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS T MIN T MAX Temperature Coefficient of V OS V OS / T R S 100kΩ µv/ C Input Offset Current I OS T A = 25 C C: 0 C E: 40 C 85 C M: 55 C mv pa

6 ELECTRICAL CHARACTERISTICS (Single/Dual) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) Input Bias Current CommonMode Voltage Range (Except ICL7612/ ICL7616) Extended CommonMode Voltage Range (ICL7612 Only) Extended CommonMode Voltage Range (ICL7616 Only) I BIAS V CMR V CMR V CMR ICL76XXA ICL76XXB ICL76XXD MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS T A = 25 C C: 0 C E: 40 C 85 C M: 55 C 10µA (Note 3) 100µA (Note 3) 1mA (Note 3) µA ±5.3 ±5.3 ± µA 1mA 10µA 100µA 1mA pa V V V 6

7 ELECTRICAL CHARACTERISTICS (Single/Dual) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) IQ = 10µA, RL = 1MΩ (Note 3) T A = 25 C C: 0 C T A E: 40 C 85 C M: 55 C ICL76XXA ICL76XXB ICL76XXD MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS ±4.9 ±4.9 ±4.9 ±4.8 ±4.8 ±4.8 ±4.7 ±4.7 ±4.7 ±4.7 ±4.7 ±4.7 T A = 25 C ±4.9 ±4.9 ±4.9 Output Voltage Swing V OUT IQ = 100µA, RL = 100kΩ C: 0 C T A E: 40 C 85 C ±4.8 ±4.8 ±4.8 ±4.5 ±4.5 ±4.5 V M: 55 C ±4.5 ±4.5 ±4.5 T A = 25 C ±4.5 ±4.5 ±4.5 IQ = 1mA, RL = 10kΩ (Note 3) C: 0 C T A E: 40 C 85 C ±4.3 ±4.3 ±4.3 ±4.0 ±4.0 ±4.0 M: 55 C ±4.0 ±4.0 ±4.0 7

8 ELECTRICAL CHARACTERISTICS (Single/Dual) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) V O = ±4.0V RL = 1MΩ, 10µA T A = 25 C C: 0 C T A E: 40 C 85 C M: 55 C ICL76XXA ICL76XXB ICL76XXD MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS T A = 25 C LargeSignal Voltage Gain A VOL VO = ±4.0V, RL = 100kΩ, 100µA C: 0 C T A E: 40 C 85 C db M: 55 C T A = 25 C VO = ±4.0V, RL = 10kΩ, 1mA (Note 3) C: 0 C T A E: 40 C 85 C M: 55 C

9 ELECTRICAL CHARACTERISTICS (Single/Dual) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) UnityGain Bandwidth GBW ICL76XXA ICL76XXB ICL76XXD MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS 10µA (Note 3) µA mA (Note 3) Input Resistance R IN Ω CommonMode Rejection Ratio PowerSupply Rejection Ratio InputReferred Noise Voltage InputReferred Noise Current CMRR PSRR 10µA (Note 3) 100µA 1mA (Note 3) 10µA (Note 3) 100µA 1mA (Note 3) e n R S = 100Ω, f = 1kHz i n R S = 100Ω, f = 1kHz MHz nv/ Hz pa/ Hz db db Supply Current (Per Amplifier) Channel Separation I SUPP No signal, no load 10µA (Note 3) 100µA 1mA (Note 3) V O1 / V O2 A VOL = db ma 9

10 ELECTRICAL CHARACTERISTICS (Single/Dual) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) Slew Rate (Note 4) SR A VOL = 1, C L = 100pF, V IN = 8V PP 10µA (Note 3), R L = 1MΩ 100µA, R L = 100kΩ IQ = 1mA (Note 3), R L = 10kΩ ICL76XXA ICL76XXB ICL76XXD MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS V/µs 10µA (Note 3), R L = 1MΩ Rise Time (Note 4) t r V IN = 50mV, C L = 100pF 100µA, R L = 100kΩ 1mA (Note 3), R L = 10kΩ µs 10µA (Note 3), R L = 1MΩ Overshoot Factor (Note 4) V IN = 50mV, C L = 100pF Note 3: ICL7611, ICL7612, ICL7616 only. Note 4: ICL7814; 39pF from pin 6 to pin µA, R L = 100kΩ 1mA (Note 3), R L = 10kΩ % 10

11 PART TEMP RANGE PINPACKAGE ICL763XBCPE 0 C to 16 Plastic Dip ICL763XBCSE 0 C to 16 Slim SO ICL763XCCPE 0 C to 16 Plastic Dip ICL763XCCSE 0 C to 16 Slim SO ICL763XECPE 0 C to 16 Plastic Dip ICL763XECSE 0 C to 16 Slim SO ICL763XBCJE 0 C to 16 CERDIP ICL763XCCJE 0 C to 16 CERDIP ICL763XECJE 0 C to 16 CERDIP ICL763XBMJE 55 C to 16 CERDIP ICL763XCMJE 55 C to 16 CERDIP Note: X above is replaced by 1, 2. Ordering Information (Triple/Quad) PART TEMP RANGE PINPACKAGE ICL764XBCPD 0 C to 14 Plastic Dip ICL764XBCWE 0 C to 16 Wide SO ICL764XCCPD 0 C to 14 Plastic Dip ICL764XCCWE 0 C to 16 Wide SO ICL764XECPD 0 C to 14 Plastic Dip ICL764XECWE 0 C to 16 Wide SO ICL764XBCJD 0 C to 14 CERDIP ICL764XCCJD 0 C to 14 CERDIP ICL764XECJD 0 C to 14 CERDIP ICL764XBMJD 55 C to 14 CERDIP ICL764XCMJD 55 C to 14 CERDIP Pin Configurations TOP VIEW ICL7631/32 16 LEAD ICL7641/42 16 LEAD WIDE S.O. ICL7641/42 14 LEAD N.C I OC SET OUTA 1 16 OUTD OUTA 1 16 OUTD INA V 2 15 INA 2 A D 15 IND INA 2 A D 15 IND A INA 3 14 OUTA INA 3 14 IND INA 3 14 IND OUTB 4 13 B INB V 4 13 V V 4 13 V V 5 12 INB INB 5 12 INC INB 5 12 INC SET I OC 6 11 INC 7 C 10 I OB SET OUT INB 6 B C OUTB INC OUTC INB 6 11 B C OUTB 7 10 INC OUTC INC 8 9 V N.C. 8 9 N.C. NOTE: PINS 5 & 15 ARE INTERNALLY CONNECTED 11

12 ABSOLUTE MAXIMUM RATINGS (Triple/Quad) Total Supply Voltage (V to V)...18V Input Voltage...(V 0.3V) to (V 0.3V) Differential Input Voltage (Note 5)...± (V 0.3V) (V 0.3V) Duration of Output Short Circuit (Note 6)...Unlimited Continuous Power Dissipation (T A = 25 C) TO99 Metal Can (derate 2mW/ C above 25 C)...250mW 8Pin Minidip (derate 2mW/ C above 25 C)...250mW 14Pin Plastic (derate 3mW/ C above 25 C)...375mW 14Pin CERDIP (derate 4mW/ C above 25 C)...500mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (Triple/Quad) 16Pin Plastic (derate 3mW/ C above 25 C)...375mW 16Pin CERDIP (derate 4mW/ C above 25 C)...500mW Operating Temperature Ranges: M Series...55 C to E Series...40 C to 85 C C Series...0 C to Storage Temperature Range...55 C to 150 C Lead Temperature (soldering, 10s) C Note 5: Longterm offset voltage stability will be degraded if large input differential voltages are applied for long periods of time. Note 6: The outputs may be shorted to ground or to either supply for VSUPP 10V. Care must be taken to insure that the dissipation rating is not exceeded. (V SUPP = ±1.0V, 10µA, T A = 25 C, unless otherwise noted.) (Specifications apply to ICL7631/7632/7642 only.) ICL76XXB ICL76XXC MIN TYP MAX MIN TYP MAX T A = 25 C 5 10 Input Offset Voltage V OS T MIN T MAX 7 12 UNITS Temperature Coefficient of V OS V OS / T R S 100kΩ µv/ C T A = 25 C Input Offset Current I OS 0 C mv pa T A = 25 C Input Bias Current I BIAS 0 C pa CommonMode Voltage Range Output Voltage Swing LargeSignal Voltage Gain UnityGain Bandwidth V CMR V V OUT A VOL R L = 1MΩ, T A = 25 C ±0.98 ±0.98 RL = 1MΩ, 0 C V O = ±0.1V, R L = 1MΩ, T A = 25 C V O = ±0.1V, R L = 1MΩ, 0 C ±0.96 ± GBW MHz Input Resistance R IN Ω CommonMode Rejection Ratio CMRR R S 100kΩ db V db 12

13 ELECTRICAL CHARACTERISTICS (Triple/Quad) (continued) (V SUPP = ±1.0V, 10µA, T A = 25 C, unless otherwise noted.) (Specifications apply to ICL7631/7632/7642 only.) PowerSupply Rejection Ratio InputReferred Noise Voltage InputReferred Noise Current Supply Current (Per Amplifier) ICL76XXB ICL76XXC MIN TYP MAX MIN TYP MAX PSRR db UNITS e n R S = 100Ω, f = 1kHz nv/ Hz i n R S = 100Ω, f = 1kHz pa/ Hz I SUPP No signal, no load µa Channel Separation V O1 / V O2 A VOL = db Slew Rate SR A VOL = 1, C L = 100pF, V IN = 0.2V PP, R L = 1MΩ Rise Time t r V IN = 50mV, C L = 100pF, R L = 1MΩ Overshoot Factor V IN = 50mV, C L = 100pF, R L = 1MΩ V/µs µs 5 5 % ELECTRICAL CHARACTERISTICS (Triple/Quad) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) Input Offset Voltage V OS T A = 25 C ICL76XXB ICL76XXC ICL76XXE MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS T MIN T MAX Temperature Coefficient of V OS V OS / T R S 100kΩ µv/ C Input Offset Current I OS T A = 25 C C: 0 C M: 55 C C: 0 C Input Bias Current I BIAS M: 55 C T A = 25 C mv pa pa

14 ELECTRICAL CHARACTERISTICS (Triple/Quad) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) CommonMode Voltage Range V CMR 10µA (Note 7) 100µA (Note 9) 1mA (Note 8) 10µA, R L = 1MΩ (Note 7) T A = 25 C C: 0 C T A M: 55 C ICL76XXB ICL76XXC ICL76XXE MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS ±4.9 ±4.9 ±4.9 ±4.8 ±4.8 ±4.8 ±4.7 ±4.7 ±4.7 V T A = 25 C ±4.9 ±4.9 ±4.9 Output Voltage Swing V OUT 100µA, R L = 100kΩ (Note 9) C: 0 C T A M: 55 C ±4.8 ±4.8 ±4.8 ±4.5 ±4.5 ±4.5 V T A = 25 C ±4.5 ±4.5 ±4.5 1mA, R L = 10kΩ (Note 8) C: 0 C T A M: 55 C ±4.3 ±4.3 ±4.3 ±4.0 ±4.0 ±4.0 14

15 ELECTRICAL CHARACTERISTICS (Triple/Quad) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) LargeSignal Voltage Gain A VOL V O = ±4.0V, R L = 1MΩ, 10µA (Note 7) V O = ±4.0V, R L = 100kΩ, 100µA T A = 25 C C: 0 C T A M: 55 C T A = 25 C C: 0 C T A M: 55 C ICL76XXB ICL76XXC ICL76XXE MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS db V O = ±4.0V, R L = 10kΩ (Note 8), 1mA (Note 7) T A = 25 C C: 0 C T A M: 55 C

16 ELECTRICAL CHARACTERISTICS (Triple/Quad) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) UnityGain Bandwidth ICL76XXB ICL76XXC ICL76XXE UNITS MIN TYP MAX MIN TYP MAX MIN TYP MAX 10µA (Note 7) G BW 100µA (Note 9) mA (Note 8) Input Resistance R IN Ω CommonMode Rejection Ratio CMRR 10µA (Note 7) 100µA 1mA (Note 8) MHz db 10µA (Note 7) PowerSupply Rejection Ratio PSRR 100µA db 1mA (Note 8) InputReferred Noise Voltage InputReferred Noise Current e n R S = 100Ω, f = 1kHz nv/ Hz i n R S = 100Ω, f = 1kHz pa/ Hz Supply Current (Per Amplifier) I SUPP No signal, no load 10µA (Note 7) 100µA 1mA (Note 8) ma Channel Separation V O1 / V O2 A VOL = db Slew Rate (Note 10) SR A VOL = 1, C L = 100pF, V IN = 8V PP 10µA (Note 7), R L = 1MΩ 100µA, R L = 100kΩ IQ = 1mA (Note 7), R L = 10kΩ V/µs 16

17 ELECTRICAL CHARACTERISTICS (Triple/Quad) (continued) (V SUPP = ±5.0V, T A = 25 C, unless otherwise noted.) Rise Time (Note 10) Overshoot Factor (Note 10) t r V IN = 50mV, C L = 100pF V IN = 50mV, C L = 100pF Note 7: Does not apply to ICL7641. Note 8: Does not apply to ICL7642. Note 9: ICL7631/ICL7632 only. Note 10: Does not apply to ICL µA (Note 7), R L = 1MΩ 100µA, R L = 100kΩ 1mA (Note 8), R L = 10kΩ 10µA (Note 7), R L = 1MΩ 100µA, R L = 100kΩ 1mA (Note 8), R L = 10kΩ ICL76XXB ICL76XXC ICL76XXE MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS µs % (T A = 25 C, unless otherwise noted.) Typical Operating Characteristics 17

18 (T A = 25 C, unless otherwise noted.) Typical Operating Characteristics (continued) 18

19 (T A = 25 C, unless otherwise noted.) Typical Operating Characteristics (continued) 19

20 (T A = 25 C, unless otherwise noted.) Typical Operating Characteristics (continued) 20

21 Detailed Description Quiescent Current Selection The voltage input to the I Q pin of the single and triple amplifiers selects a quiescent current (I Q ) of 10µA, 100µA, or 1000µA. The dual and quad amplifiers have fixed quiescent current (I Q ) settings. Unitygain bandwidth and slewrate increase with increasing quiescent current, as does output sink current capability. The output source current capability is independent of quiescent current. The lowest I Q setting that results in sufficient bandwidth and slew rate should be selected for each specific application. The I Q pin of the single and triple amplifiers controls the quiescent current as follows: 10µA I Q pin to V 100µA I Q pin between V 0.8V and V 0.8V 1mA I Q pin to V and the voltage gain is maximized in this mode. The output stage, however, can also be operated in Class AB, which supplies higher output currents (see the Typical Operating Characteristics). The voltage gain decreases and the output transfer characteristic is nonlinear during the transition from Class A to Class B operation. The output stage, with a gain that is directly proportional to load impedance, approximates a transconductance amplifier. Approximately the same openloop gains are obtained at each of the I Q settings if corresponding loads of 10kΩ, 100kΩ, and 1MΩ are used. The maximum output source current is higher than the maximum sink current, and is independent of I Q. Like most amplifiers, there are output loads for which the amplifier stability is not guaranteed. In particular, avoid capacitive loads greater than 100pF; and while on the 1mA I Q setting, avoid loads less than 5kΩ. Since the output stage is a transconductance output, very large (>10µF) capacitive loads will create a dominant pole and the output will be stable, even with loads that are less than 5kΩ. Input Offset Nulling The input offset can be nulled by connecting a 25kΩ pot between the OFFSET terminals with the wiper connected to V. At quiescent currents of 1mA and 100µA, the nulling range provided is adequate for all V OS selections. However, with higher values of V OS, and an I Q of 10µA, nulling may not be possible. Frequency Compensation All of the ICL7611 and ICL7621 series except the ICL7614 are internally compensated for unitygain operation. The ICL7614 is externally compensated by a capacitor connected between COMP and OUT pins, with 39pF being greater than unity. The compensation capacitor value may be reduced to increase the bandwidth and slew rate. The ICL7132 is not compensated and does not have frequency compensation pins. Use only at gains 20 at I Q of 1mA; at gains > 10 at I Q of 100µA; at gain > 5 at I Q of 10µA. Output Loading Considerations Approximately 70% of the amplifier s quiescent current flows in the output stage. The output swing can approach the supply rails for output loads of 1MΩ, 100kΩ, and 10kΩ, using the output stage in a highly linear Class A mode. Crossover distortion is avoided Extended CommonMode Voltage Range (ICL7612/ICL7616) A commonmode voltage range that includes both V and V is often desirable, especially in singlesupply operation. The ICL7612/ICL7616 extended commonmode range op amps are designed specifically to meet this need. The ICL7612 input commonmode voltage range (CMVR) extends beyond both powersupply rails when operated with at least 3V total supply and an I Q of 10µA or 100µA. The ICL7616 CMVR includes the negative supply voltage (or ground when operated with a single supply) at an I Q or 10µA or 100µA. PC Board Layout Careful PC board layout techniques must be used to take full advantage of the very low bias current of the ICL7611 family. The inputs should be encircled with a lowimpedance trace, or guard, that is at the same potential as the inputs. In an inverting amplifier, this is normally ground; in a unitygain buffer connect the guard to the output. A convenient way of guarding the 8pin TO99 version of the ICL7611 is to use a 10pin circle, with the two extra pads on either side of the input pins to provide space for a guard ring (see Figure 8). Assembled boards should be carefully cleaned, and if a high humidity environment is expected, conformally coated. 21

22 SingleSupply Operation The ICL7611 family will operate from a single 2V to 16V power supply. The commonmode voltage range of the standard amplifier types when operated from a single supply is 1.0V to (V 0.6V) at 10µA I Q. At 100µA I Q, the CMVR is 1.0V to (V 0.8V), and at 1mA I Q, the CMVR is 1.3V to (V 1.3V). If this CMVR range is insufficient, use the ICL7612, whose CMVR includes both ground and V, or the ICL7616, whose CMVR includes ground. A convenient way to generate a psuedoground at V/2 is to use one op amp of a quad to buffer a V/2 voltage from a highimpedance resistive divider. LowVoltage Operation Operation at V SUPP = ±1.0V is only guaranteed at 10µA. Output swings to within a few millivolts of the supply rails are achievable for R L (> or =) 1MΩ. Guaranteed input CMVR is ±0.6V minimum and typically 0.9V to 0.7V at V SUPP = ±1.0V. For applications where greater commonmode range is desirable, see the description of ICL7612 and ICL7616 above. Applications Information Note that in no case is IQ shown. The value of IQ must be chosen by the designer with regard to frequency response and power dissipation. A1 R R3 V IN R1 18V R2 R2 R A3 V OUT V IN ICL7612 R L 10kΩ V OUT 25kΩ R3 A2 GAIN = R3 2R2 ( 1 ) R R1 Figure 1. Instrumentation Amplifier Adjust R3 to improve CMRR. The offset of all three amplifiers is nulled by the offset adjustment of A2. Figure 2. Simple Follower By using the ICL7612 in these applications, the circuits will follow railtorail inputs 22

23 V IN 100kΩ 5 5 1MΩ V OUT TO CMOS OR LPTTL LOGIC Figure 3. Level Detector By using the ICL7612 in these applications, the circuits will follow railtorail inputs. 1 2 ICL7621 1MΩ 1 2 ICL7621 1MΩ V V 880kΩ DUTY CYCLE 1µF ICL7611 IH5040 V OUT Figure 4. Photocurrent Integrator Lowleakage currents allow integration times up to several hours. V IN 0.05µF COMMON 10kΩ 2.2MΩ 1 2 ICL µF 1.8kΩ = 5% SCALE ADJUST 20kΩ 20kΩ 1 2 ICL7621 1MΩ V ON TO SUCCEEDING INPUT STAGE V OL Figure 5. Precise Triangle/Square Wave Generator The frequency and duty cycle are virtually independent of power supply. Figure 6. Averaging AC to DC Converter Recommended for Maxim s ICL7106/ICL7107/ICL7109 A/D Converters. 15V BOTTOM VIEW 15V 100Ω V I O SET 10kΩ 10kΩ V V NOTE 1 I O COMP OUT NOTE 2 OUTPUT NOTES: 1. ICL7611, 7612, 7616, 7631, ICL7611, 7612, 7616, 7621, 7622, 7631, 7641, 7642 V 4 3 GUARD INPUTS Figure 7. BurnIn and Life Test Circuit Figure 8. Input Guard for TO99 23

24 V IN S/H CONTROL INPUT 100kΩ S2 R S1 1 ICL A2 ICL7622 A1 IH5141 C HOLD Figure 9. Low Droop Rate Sample and Hold S2 improves accuracy and acquisition time by including the voltage drop across S1 inside the feedback loop. R1 closes the feedback loop of A1 during the hold phase. The droop rate is [I BIAS(AZ ) I LEAK(S1 ) I LEAK(S2) ]/C HOLD. V OUT V IN R IN Figure 10. LongTime Constant Integrator With R IN = 1011Ω, the time constant of this integrator is 100,000s. Since the input voltage is converted to a current by R IN, the input voltage can far exceed the powersupply range. C INT 1µF V OUT C FB R FB Ω V IN 10MΩ 10MΩ OUTPUT ICL pF CURRENT SOURCE V O = 100mV/pA 5MΩ Figure 11. Pico Ammeter The response time of this curcuit is R FB x C FB, where C FB is the stray capacitance between the output and the inverting terminal of the amplifier. 270pF 270pF Figure Hz Twin T Notch Filter The low 1pA bias current of the ICL7611 allows use of small 540pF and 270pF capacitors, even with a notch frequency of 60Hz. The 60Hz rejection is approximately 40dB. Typical Operating Circuit C INT R IN V IN V OUT LONG TIME CONSTANT INTEGRATOR (Detailed Circuit Diagram Figure 10) 24

25 Chip Topographies Package Information For the latest package outline information and land patterns, go to Note that a, #, or in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. TO99 T PDIP P SO S CDIP J PDIP P CDIP J PDIP P SO S Wide SO W

26 REVISION NUMBER REVISION DATE DESCRIPTION Revision History PAGES CHANGED 2 4/08 Removed all part numbers offered in die form from the Ordering Information 2, /10 Corrected letter grades in EC table headings Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 26 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.