Single/Dual/Quad, +1.8V/750nA, SC70, Rail-to-Rail Op Amps

Transcription

1 9-; Rev 4; 7/ Single/Dual/Quad, +.8V/75nA, SC7, General Description The MAX4464/MAX447/MAX447/MAX447/MAX4474 family of micropower op amps operate from a single +.8V to +5.5V supply and draw only 75nA of supply current. The MAX447 family feature ground-sensing inputs and rail-to-rail output. The ultra-low supply current, low-operating voltage, and rail-to-rail output capabilities make these operational amplifiers ideal for use in single lithium ion (Li+), or two-cell NiCd or alkaline battery systems. The rail-to-rail output stage of the MAX4464/MAX447/ MAX447/MAX447/MAX4474 amplifiers is capable of driving the output voltage to within 4mV of the rail with a kω load, and can sink and source ma with a +5V supply. These amplifiers are available in both fully compensated and decompensated versions. The single MAX447, dual MAX447, and the quad MAX447 are unity-gain stable. The single MAX4464 and the dual MAX4474 are stable for closed-loop gain configurations of +5V/V. These amplifiers are available in space-saving WLP, SC7, SOT, µmax, and TSSOP packages. Battery-Powered Systems Portable Instrumentation Pagers and Cellphones Micropower Thermostats MAX447 + IN+ V SS A IN- B OUT C A V DD B N.C. C WLP BUMP SIDE DOWN Applications Electrometer Amplifiers Solar-Powered Systems Remote Sensor Active Badges ph Meters Pin Configurations Pin Configurations continued at end of data sheet. µmax is a registered trademark of Maxim Integrated Products, Inc. Features Ultra-Low 75nA Supply Current Per Amplifier Ultra-Low +.8V Supply Voltage Operation Ground-Sensing Input Common-Mode Range Outputs Swing Rail-to-Rail Outputs Source and Sink ma of Load Current No Phase Reversal for Overdriven Inputs High db Open-Loop Voltage Gain Low 5µV Input Offset Voltage 9kHz Gain-Bandwidth Product (MAX447/MAX447/MAX447) 4kHz Gain-Bandwidth Product () 5pF (min) Capacitive Load Capability Available in Tiny, 6-Bump WLP, 5-Pin SC7, and 8-Pin SOT Packages PART PART NO. OF AMPLIFIERS Ordering Information TEMP RANGE GAIN- BANDWIDTH PIN- PACKAGE MINIMUM STABLE GAIN MAX4464 4kHz 5V/V MAX447 9kHz V/V MAX447 9kHz V/V MAX kHz V/V MAX4474 4kHz 5V/V TOP MARK MAX4464EXK+T C to +85 C 5 SC7 +ABT MAX4464EUK+T C to +85 C 5 SOT +ADPI MAX447EXK+T C to +85 C 5 SC7 +ABS MAX447EUK+T C to +85 C 5 SOT +ADPH MAX447EWT+ C to +85 C 6 WLP +BP MAX447EKA+T C to +85 C 8 SOT +AAEK MAX447ESA+ C to +85 C 8 SO MAX447EUD+ C to +85 C 4 TSSOP MAX447ESD+ C to +85 C 4 SO MAX4474EKA+T C to +85 C 8 SOT +AAEL MAX4474EUA+ C to +85 C 8 µmax MAX4474ESA+ C to +85 C 8 SO +Denotes a lead(pb)-free/rohs-compliant package. Selector Guide MAX4464/MAX447/MAX447/MAX447/MAX4474 Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 ABSOLUTE MAXIMUM RATINGS V DD to V SS...-.V to +6V IN_+ or IN_-...(V SS -.V) to (V DD +.V) OUT_ Shorted to V SS or V DD...Continuous Continuous Power Dissipation (T A = +7 C) 5-Pin SC7 (derate.mw/ C above +7 C)...47mW 5-Pin SOT (derate 7.mW/ C above +7 C)...57mW 6-Bump WLP (derate.5mw/ C above +7 C)...84mW 8-Pin SOT (derate 8.9mW/ C above +7 C)...74mW 8-Pin µmax (derate 4.5mW/ C above +7 C)...6mW 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 8-Pin SO (derate 5.88mW/ C above +7 C)...47mW 4-Pin TSSOP (derate 9.mW/ C above +7 C)...77mW 4-Pin SO (derate 8.mW/ C above +7 C)...667mW Operating Temperature Range... C to +85 C Junction Temperature...+5 C Storage Temperature Range...5 C to +5 C Lead Temperature (soldering, s)...+ C Soldering Temperature (reflow)...+6 C (, V SS = V, V CM = V, V OUT = V DD /, R L = to V DD /, T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V DD Guaranteed by PSRR tests V Supply Current (Per Amplifier) V DD = +.8V.6 I DD V DD = +5.V.75. Input Offset Voltage V OS ±.5 ±7. mv Input Bias Current I B ± ±5 pa Input Offset Current I OS ±.5 pa Input Common-Mode Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio V CM Guaranteed by the CMRR test V SS V DD -. CMRR Specified with V SS V CM (V DD -.V) 7 95 db PSRR +.8V V DD +5.5V 7 9 db, V OUT = 5mV to V DD - 5mV 9 Large-Signal Voltage Gain A VOL R L = kω, V OUT = mv to V DD - mv 9 R L = kω, V OUT = mv to V DD - mv Output Voltage Swing Gain-Bandwidth Product V OH V OL GBW Swing high 4 specified as R L = kω 4 V DD - V OH RL = kω 4 Swing low.5 5 specified as R L = kω 5 V OL - V SS RL = kω MAX447/MAX447/MAX MAX447/MAX447/MAX447 9 Phase Margin φ M 8 µa V db mv khz d eg r ees

3 Single/Dual/Quad, +.8V/75nA, SC7, ELECTRICAL CHARACTERISTICS (continued) (, V SS = V, V CM = V, V OUT = V DD /, R L = to V DD /, T A = +5 C, unless otherwise noted.) Slew Rate PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SR V OUT = MAX447/MAX447/MAX447 4V step f = khz 5 Input Voltage Noise e n f = khz Output Short-Circuit Shorted to V SS (sourcing) Current Shorted to V DD (sinking) 6 Power-On Time t ON ms Power-Off Time t OFF µs Capacitive Load C LOAD No sustained oscillations 5 pf ELECTRICAL CHARACTERISTICS (, V SS = V, V CM = V, V OUT = V DD /, R L = to V DD /, T A = T MIN to T MAX, unless otherwise noted.) (Note ) Note : All devices are production tested at T A = +5 C. All temperature limits are guaranteed by design. V/ms nv / Hz PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V DD Guaranteed by PSRR tests V Supply Current (Per Amplifier) I DD V DD = +5.V.5 µa Input Offset Voltage V OS ±5 mv Input Offset Voltage Temperature Coefficient TCV OS 8 µv/ C Input Bias Current I B 4.5 na Input Common-Mode Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio V CM Guaranteed by the CMRR test V SS V DD -. CMRR V SS V CM (V DD -.V) 56 db PSRR +.8V V DD +5.5V, o C T A +85 o C 65 +V V DD +5.5V, o C T A +85 o C 65 V OUT = 5mV to V DD - 5mV, 75 Large-Signal Voltage Gain A VOL V OUT = mv to V DD - mv, R L = kω 75 Output Voltage Swing V OH V OL Swing high specified 5 as V DD - V OH RL = kω 5 Swing low specified as 5 V OL - V SS RL = kω 5 ma V db db mv MAX4464/MAX447/MAX447/MAX447/MAX4474

4 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 Typical Operating Characteristics (, V SS = V, V CM = V, R L = kω to V DD /, T A = +5 C, unless otherwise noted.) SUPPLY CURRENT (µa) OFFSET VOLTAGE (mv) PSRR (db) SUPPLY CURRENT PER AMPLIFIER vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE COMMON-MODE VOLTAGE (V) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY k k MAX toc MAX4474 toc4 MAX toc7 SUPPLY CURRENT (µa) BIAS CURRENT (pa) VOL - VSS (mv) SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE TEMPERATURE ( C) BIAS CURRENT vs. TEMPERATURE TEMPERATURE ( C) VOLTAGE SWING LOW vs. TEMPERATURE R L = kω TEMPERATURE ( C) MAX toc MAX toc5 MAX toc8 OFFSET VOLTAGE (mv) BIAS CURRENT (pa) VDD - VOH (mv) OFFSET VOLTAGE vs. TEMPERATURE TEMPERATURE ( C) BIAS CURRENT vs. COMMON-MODE VOLTAGE COMMON-MODE VOLTAGE (V) VOLTAGE SWING HIGH vs. TEMPERATURE R L = kω TEMPERATURE ( C) MAX toc MAX toc6 MAX toc9 4

5 Single/Dual/Quad, +.8V/75nA, SC7, CMRR (db) THD + N (%) COMMON-MODE REJECTION RATIO vs. TEMPERATURE TEMPERATURE ( C) MAX447/MAX447/MAX447 GAIN AND PHASE vs. FREQUENCY MAX toc C L = pf R 6 L = MΩ 5 A 5 VCL = V/V GAIN PHASE - -9 k k k. Typical Operating Characteristics (continued) (, V SS = V, V CM = V, R L = kω to V DD /, T A = +5 C, unless otherwise noted.).. MAX447/MAX447/MAX447 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY MAX toc MAX toc6 PHASE (deg) MINIMUM SUPPLY VOLTAGE (V) NOISE (nv/ Hz) MINIMUM SUPPLY VOLTAGE vs. TEMPERATURE TEMPERATURE ( C) MAX447/MAX447/MAX447 GAIN AND PHASE vs. FREQUENCY MAX toc PHASE 5 - A VCL = V/V -9 C L = 5pF k k k k k GAIN VOLTAGE NOISE DENSITY vs. FREQUENCY MAX4474 toc MAX toc PHASE (deg) AVOL (db) CROSSTALK (db) CAPACITIVE LOAD (pf) A VOL vs. VOLTAGE SWING R L = kω VOLTAGE (Vp-p) R L = kω CROSSTALK vs. FREQUENCY k k k k k k MAX447/MAX447/MAX447 STABILITY vs. CAPACITIVE AND RESISTIVE LOADS UNSTABLE REGION MAX4474 toc MAX447 toc5 MAX toc8 MAX4464/MAX447/MAX447/MAX447/MAX4474. k k k k k k k M RESISTIVE LOAD (Ω) 5

6 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 Typical Operating Characteristics (continued) (, V SS = V, V CM = V, R L = kω to V DD /, T A = +5 C, unless otherwise noted.) IOUT (ma) 5mV/div 5mV/div PERCENT OVERSHOOT (%) I OUT vs. V OUT I SINK 4 5 V OUT (V) MAX447/MAX447/MAX447 SMALL-SIGNAL STEP RESPONSE 5µs/div MAX447 toc A V = +V/V C L = pf MAX447/MAX447/MAX447 PERCENT OVERSHOOT vs. CAPACITIVE LOAD R L = kω I SOURCE R L = kω C LOAD (pf) MAX toc9 MAX toc5 5mV/div 5mV/div 5mV/div 5mV/div MAX447/MAX447/MAX447 SMALL-SIGNAL STEP RESPONSE MAX447/MAX447/MAX447 LARGE-SIGNAL STEP RESPONSE 5µs/div MAX447 toc A V = +V/V C L = pf MAX447/MAX447/MAX447 SMALL-SIGNAL GAIN vs. FREQUENCY R L = kω V OUT = mv P-P C L = pf 5µs/div A V = MAX447 toc A V = +V/V C L = pf k k MAX toc6 5mV/div 5mV/div 5mV/div 5mV/div MAX447/MAX447/MAX447 SMALL-SIGNAL STEP RESPONSE 5µs/div 5µs/div MAX447 toc A V = +V/V C L = 5pF MAX447/MAX447/MAX447 LARGE-SIGNAL STEP RESPONSE MAX447 toc4 A V = +V/V C L = pf MAX447/MAX447/MAX447 SMALL-SIGNAL GAIN vs. FREQUENCY R L = kω V OUT = mv P-P C L = pf A V = k k k MAX toc7 6

7 Single/Dual/Quad, +.8V/75nA, SC7, THD + N (%) Typical Operating Characteristics (continued) (, V SS = V, V CM = V, R L = kω to V DD /, T A = +5 C, unless otherwise noted.) MAX447/MAX447/MAX447 SMALL-SIGNAL GAIN vs. FREQUENCY V OUT = mv P-P C L = pf A V = k k k MAX447/MAX447/MAX447 LARGE-SIGNAL GAIN vs. FREQUENCY V OUT = V P-P C L = pf A V = k k.. TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY MAX447 74toc8 MAX toc MAX4464 toc4 CAPACITIVE LOAD (pf) - - -, MAX447/MAX447/MAX447 LARGE-SIGNAL GAIN vs. FREQUENCY R L = kω V OUT = V P-P C L = pf A V = k k GAIN AND PHASE vs. FREQUENCY MAX4464 toc R L =MΩ 6 C L = 8pF A 5 VCL = V/V 5 4 GAIN 9 45 PHASE k k k, STABILITY vs. CAPACITIVE AND RESISTIVE LOADS UNSTABLE REGION MAX toc9 MAX4464 toc5 PHASE (degrees) MAX447/MAX447/MAX447 LARGE-SIGNAL GAIN vs. FREQUENCY R L = kω V OUT = V P-P C L = pf A V = k k GAIN AND PHASE vs. FREQUENCY MAX4464 toc R L =MΩ 6 C L = 5pF 5 A 5 VCL = V/V 4 GAIN PHASE k k k mv/div 5mV/div SMALL-SIGNAL STEP RESPONSE A V = +5V/V C L = 8pF MAX toc MAX4464 toc6 PHASE (degrees) MAX4464/MAX447/MAX447/MAX447/MAX4474. k k k k M RESISTIVE LOAD (Ω) 5µs/div 7

8 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 Typical Operating Characteristics (continued) (, V SS = V, V CM = V, R L = kω to V DD /, T A = +5 C, unless otherwise noted.) mv/div 5mV/div SMALL-SIGNAL STEP RESPONSE mv/div 5mV/div µs/div A V = +5V/V C L = 5pF MAX4464 toc7 mv/div 5mV/div LARGE-SIGNAL STEP RESPONSE 5µs/div A V = +5V/V C L = pf SMALL-SIGNAL NORMALIZED GAIN vs. FREQUENCY R L = kω V OUT = mv P-P C L = pf k k k A V = +5 MAX4464 toc4 MAX4464 toc4 SMALL-SIGNAL STEP RESPONSE 5µs/div A V = +5V/V C L = pf PERCENT OVERSHOOT (%) MAX4464 toc mv/div 5mV/div LARGE-SIGNAL STEP RESPONSE 5µs/div PERCENT OVERSHOOT vs. CAPACITIVE LOAD R L = kω R L = kω C LOAD (pf) SMALL-SIGNAL NORMALIZED GAIN vs. FREQUENCY R L = kω V OUT = mv P-P C L = pf A V = +5 k k k MAX4464 toc4 MAX4464 toc4 A V = +5V/V C L = 8pF MAX4464 toc9 8

9 Single/Dual/Quad, +.8V/75nA, SC7, Typical Operating Characteristics (continued) (, V SS = V, V CM = V, R L = kω to V DD /, T A = +5 C, unless otherwise noted.) MAX4464/ MAX SMALL-SIGNAL NORMALIZED GAIN vs. FREQUENCY V OUT = mv P-P C L = pf k k k LARGE-SIGNAL NORMALIZED GAIN vs. FREQUENCY R L = kω V OUT = V P-P C L = pf k k k MAX447 (WLP) PIN A V = +5 MAX447/ MAX4474 A V = +5 MAX4464 toc44 MAX4464 toc46 MAX447 NAME LARGE-SIGNAL NORMALIZED GAIN vs. FREQUENCY R L = kω V OUT = V P-P C L = pf k k k LARGE-SIGNAL NORMALIZED GAIN vs. FREQUENCY V OUT = V P-P C L = pf A IN+ Noninverting Amplifier Input A V = +5 k k k FUNCTION INA+ Noninverting Amplifier Input (Channel A) A 4 V SS Negative Power-Supply Voltage B IN- Inverting Amplifier Input 4 C OUT Amplifier Output INA- Inverting Amplifier Input (Channel A) A V = +5 Pin Description MAX4464 toc45 MAX4464 toc47 MAX4464/MAX447/MAX447/MAX447/MAX4474 9

10 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 MAX4464/ MAX447 MAX447 (WLP) PIN MAX447/ MAX4474 MAX447 Applications Information Ground Sensing The common-mode input range of the MAX447 family extends down to ground, and offers excellent commonmode rejection. These devices are guaranteed not to undergo phase reversal when the input is overdriven. Power Supplies and Layout The MAX447 family operates from a single +.8V to +5.5V power supply. Bypass power supplies with a.µf ceramic capacitor placed close to the VDD pin. Ground layout improves performance by decreasing the amount of stray capacitance and noise at the op amp s inputs and outputs. To decrease stray capacitance, minimize PC board lengths and resistor leads, and place external components close to the op amps pins. Bandwidth The MAX447/MAX447/MAX447 are internally compensated for unity-gain stability and have a typical gain-bandwidth of 9kHz. The have a 4kHz typical gain-bandwidth and are stable for a gain of +5V/V or greater. NAME OUTA Amplifier Output (Channel A) Pin Description (continued) Stability The MAX4464/MAX447/MAX447/MAX447/MAX4474 maintain stability in their minimum gain configuration while driving capacitive loads. Although this product family is primarily designed for low-frequency applications, good layout is extremely important because lowpower requirements demand high-impedance circuits. The layout should also minimize stray capacitance at the amplifier inputs. However some stray capacitance may be unavoidable, and it may be necessary to add a pf to pf capacitor across the feedback resistor as shown in Figure. Select the smallest capacitor value that ensures stability. R V IN FUNCTION 6 6 INB- Inverting Amplifier Input (Channel B) 5 5 INB+ Noninverting Amplifier Input (Channel B) 7 7 OUTB Amplifier Output (Channel B) 9 INC- Inverting Amplifier Input (Channel C) INC+ Noninverting Amplifier Input (Channel C) 8 OUTC Amplifier Output (Channel C) IND- Inverting Amplifier Input (Channel D) IND+ Noninverting Amplifier Input (Channel D) 4 OUTD Amplifier Output (Channel D) 5 B 8 4 V DD Positive Power-Supply Voltage C N.C. No Connection. Not internally connected. V CC MAX44 V SS R pf TO pf Figure. Compensation for Feedback Node Capacitance

11 Single/Dual/Quad, +.8V/75nA, SC7, TOP VIEW IN+ V SS INB- IN- PROCESS: BiCMOS + MAX447 5 V DD MAX SC7/SOT OUT OUTA INA+ VSS Chip Information MAX447 OUTA MAX SOT/µMAX/SO Pin Configurations (continued) V DD OUTB INB+ INA+ V DD INB+ INC- OUTB MAX447 SO/TSSOP OUTD IND+ V SS INC+ INB- INA- IND- INA- OUTC MAX4464/MAX447/MAX447/MAX447/MAX4474

12 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 Package Information For the latest package outline information and land patterns (footprints), 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. LAND PATTERN NO. 5 SC7 X SOT U WLP W6B+ Refer to Application Note 89 8 µmax U SOT K SOIC S SOIC S TSSOP U4+ 6 9

13 Single/Dual/Quad, +.8V/75nA, SC7, Package Information (continued) For the latest package outline information and land patterns (footprints), 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. MAX4464/MAX447/MAX447/MAX447/MAX4474

14 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 Package Information (continued) For the latest package outline information and land patterns (footprints), 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. 4

15 Single/Dual/Quad, +.8V/75nA, SC7, Package Information (continued) For the latest package outline information and land patterns (footprints), 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. MAX4464/MAX447/MAX447/MAX447/MAX4474 5

16 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 Package Information (continued) For the latest package outline information and land patterns (footprints), 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. MARKING PACKAGE OUTLINE, SOT-, 8L BODY 8 J 6

17 Single/Dual/Quad, +.8V/75nA, SC7, Package Information (continued) For the latest package outline information and land patterns (footprints), 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. MAX4464/MAX447/MAX447/MAX447/MAX4474 7

18 Single/Dual/Quad, +.8V/75nA, SC7, MAX4464/MAX447/MAX447/MAX447/MAX4474 Package Information (continued) For the latest package outline information and land patterns (footprints), 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. 8

19 Single/Dual/Quad, +.8V/75nA, SC7, REVISION NUMBER REVISION DATE DESCRIPTION Revision History PAGES CHANGED 6/ Added WLP package,, 9,, 4 7/ Updated power-on time specification MAX4464/MAX447/MAX447/MAX447/MAX4474 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. Maxim Integrated Products, San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.