High-Precision, Low-Voltage, Micropower Op Amp MAX480. General Description. Features. Ordering Information. Applications.

Transcription

1 9-77; Rev a; /98 High-Precision, Low-oltage, General Description The is a precision micropower operational amplifier with flexible power-supply capability. Its guaranteed µ maximum offset voltage (5µ typ) is the lowest of any micropower op amp. Similarly, input bias current, input offset current, and drift specifications are within tight limits. Both the input and output voltage ranges include the negative supply rail, allowing maximum signal range capability in single-supply applications. The operates with either a single supply ranging from +. to + or dual supplies from ±.8 to ±8. The consumes less than µa, allowing operation in excess of, hours from a 5mA-hr lithium coin cell. Even with a minimal quiescent current, the amplifier sinks or sources 5mA from its output. The is available in 8-pin DIP and SO packages in commercial, extended, and military temperature ranges. Precision Micropower Amplifiers Micropower Signal Processing Battery-Powered Analog Circuits Applications Features Single- or Dual-Supply Operation: +. to +, ±.8 to ±8 True Single-Supply Operation: Input and Output oltage Ranges Include Ground.µ/ C Max Offset oltage Drift µa Max Supply Current 5mA Min Output Drive µ Max Input Offset oltage na Max Input Bias Current 5/m Min Open-Loop Gain Standard 7 Pinout with Nulling to - Ordering Information PART TEMP. RANGE PIN-PACKAGE CPA CSA C to +7 C C to +7 C 8 Plastic DIP 8 SO EPA - C to +85 C 8 Plastic DIP ESA - C to +85 C 8 SO MJA -55 C to +5 C 8 CERDIP Typical Operating Circuit Pin Configuration R k + (5) TOP IEW IN R k HP IN9 R k OUT NULL IN- IN N.C. + OUT NULL DIP/SO SINGLE OP AMP FULL-WAE RECTIFIER Maxim Integrated Products For free samples & the latest literature: or phone For small orders, phone ext. 8.

2 ABSOLUTE MAXIMUM RATINGS Supply oltage (+ to -)...±8 Differential Input oltage...(- - ) to (+ + ) Common-Mode Input oltage...(- - ) to (+ + ) Output Short-Circuit Duration...Indefinite Continuous Power Dissipation Plastic DIP (derate 9.9mW/ C above +7 C)...77mW SO (derate 5.88mW/ C above +7 C)...7mW CERDIP (derate 8.mW/ C above +7 C)...mW Operating Temperature Ranges C_A... C to +7 C E_A...- C to +85 C MJA C to +5 C Junction Temperature (T J )...-5 C to +5 C Storage Temperature Range...-5 C to +5 C Lead Temperature (soldering, sec)...+ 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. ELECTRICAL CHARACTERISTICS ( S = ±.5 to ±5, T A = +5 C, unless otherwise noted.) PARAMETER Input Offset oltage Input Offset Current Input Bias Current Large-Signal oltage Gain Input oltage Output oltage Swing Common-Mode Rejection Ratio Power-Supply Rejection Ratio Slew Rate Supply Current Capacitive Load Stability Input Noise oltage Differential-Mode Input Resistance Common-Mode Input Resistance SYMBOL CONDITIONS MIN TYP MAX UNITS OS 5 µ I OS CM =. na I B CM = na R L = kω 5, O = ± R L = kω A O R L = kω 75 5 /m + = 5, - =, R L = kω < O < R L = kω 5 8 IR + = 5, - = / S = ±5k (Note ) -5/.5 O R L = kω ± ±. R L = kω ± ± OH + = 5, - =, R L = kω.. OL + = 5, - =, R L = kω 5 µ CMRR + = 5, - =, < CM < 85, -5 < CM <.5 9 db PSRR. µ/ SR 5 /ms I SY S = ± µa A = +/, no oscillations (Note ) 5 5 pf e np-p f O =.Hz to Hz, µp-p R IN MΩ R INCM GΩ

3 ELECTRICAL CHARACTERISTICS ( S = ±.5 to ±5, T A = T MIN to T MAX, unless otherwise noted.) PARAMETER Input Offset oltage Input Offset oltage Drift Input Offset Current Input Bias Current Large-Signal oltage Gain Input oltage Range Output oltage Swing Common-Mode Rejection Ratio Power-Supply Rejection Ratio Supply Current SYMBOL OS TC OS I OS I B A O IR (Note ) CM = CONDITIONS R L = kω ±.5 ± ±.5 ± ±.5 ±.7 O R L = kω ±.5 ±.8 ±.5 ±.8 ±.5 ±.5 PSRR I SY CM = Note : Guaranteed by CMRR test. Note : Guaranteed by design. C MIN TYP MAX.... R L = kω , = ± R L = kω 5 R L = kω = 5, R L = kω =, < O < R L = kω 5 + = 5, - = /.5 /.5 /.5. E MIN TYP MAX M MIN TYP MAX + = 5, - = OH R L = kω = 5, - = OL µ R L = kω CMRR (Note ) -5/.5-5/.5-5/.5 + = 5, - =, < CM <.5, -5 < CM < S = ± UNITS µ µ/ C na na /m db µ/ µa

4 (T A = +5 C, unless otherwise noted.) INPUT OFFSET OLTAGE (µ) 8 INPUT OFFSET OLTAGE - INPUT OFFSET CURRENT (na) INPUT OFFSET CURRENT Typical Operating Characteristics - INPUT BIAS CURRENT (na) INPUT BIAS CURRENT SUPPLY CURRENT (µa) 8 8 NO LOAD S = ±.5 SUPPLY CURRENT - OPEN-LOOP GAIN (/m) 5 OPEN-LOOP GAIN vs. SINGLE-SUPPLY OLTAGE R L = kω T A = +5 C T A = +85 C T A = +5 C -5 OPEN-LOOP GAIN (db) 8 OPEN-LOOP GAIN AND PHASE SHIFT vs. FREQUENCY GAIN R L = kω PHASE PHASE SHIFT (DEGREES) SINGLE-SUPPLY OLTAGE (). k k k CLOSED-LOOP GAIN (db) - CLOSED-LOOP GAIN vs. FREQUENCY k k k -7 OUTPUT OLTAGE SWING () 5 + = 5 - = OUTPUT OLTAGE SWING vs. LOAD RESISTANCE k k k LOAD RESISTANCE (Ω) -8 OUTPUT OLTAGE SWING () 8 OUTPUT OLTAGE SWING vs. LOAD RESISTANCE POSITIE SUPPLY NEGATIE SUPPLY k k k LOAD RESISTANCE (Ω) -9

5 (T A = +5 C, unless otherwise noted.) POWER-SUPPLY REJECTION (db) 8 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY POSITIE SUPPLY NEGATIE SUPPLY - COMMON-MODE REJECTION (db) Typical Operating Characteristics (continued) 8 COMMON-MODE REJECTION RATIO vs. FREQUENCY S = ± 5 - NOISE OLTAGE DENSITY (n/ Hz) NOISE OLTAGE DENSITY vs. FREQUENCY - k k. k CURRENT NOISE DENSITY (pa/ Hz) CURRENT NOISE DENSITY vs. FREQUENCY - SMALL-SIGNAL TRANSIENT RESPONSE - LARGE-SIGNAL TRANSIENT RESPONSE -5.. k µs/div, A = +, R L = kω, C L = 5pF ms/div, A = +, R L = kω, C L = 5pF 5

6 IN- IN k OUT Figure. Offset Nulling Circuit Figure. Burn-In Circuit Package Information SOICN.EPS 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 Printed USA is a registered trademark of Maxim Integrated Products.