Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOT 23 5

General Description

The single MAX4091, dual MAX4092, and quad

MAX4094 operational amplifiers combine excellent DC

accuracy with Rail-to-Rail

operation at the input and

output. Since the common-mode voltage extends from

to V

, the devices can operate from either a sin-

gle supply (2.7V to 6V) or split supplies (±1.35V to

±3V). Each op amp requires less than 130µA of supply

current. Even with this low current, the op amps are

capable of driving a 1kΩ load, and the input-referred

voltage noise is only 12nV/√Hz. In addition, these op

amps can drive loads in excess of 2000pF.

The precision performance of the MAX4091/MAX4092/

MAX4094 combined with their wide input and output

dynamic range, low-voltage, single-supply operation,

and very low supply current, make them an ideal

choice for battery-operated equipment, industrial, and

data acquisition and control applications. In addition,

the MAX4091 is available in space-saving 5-pin SOT23,

8-pin µMAX, and 8-pin SO packages. The MAX4092 is

available in 8-pin µMAX and SO packages, and the

MAX4094 is available in 14-pin TSSOP and 14-pin SO

packages.

________________________Applications

Portable Equipment

Battery-Powered Instruments

Data Acquisition and Control

Low-Voltage Signal Conditioning

Features

♦ Low-Voltage, Single-Supply Operation (2.7V to 6V)

♦ Beyond-the-Rails™ Inputs

♦ No Phase Reversal for Overdriven Inputs

♦ 30µV Offset Voltage

♦ Rail-to-Rail Output Swing with 1kΩ Load

♦ Unity-Gain Stable with 2000pF Load

♦ 165µA (max) Quiescent Current Per Op Amp

♦ 500kHz Gain-Bandwidth Product

♦ High Voltage Gain (115dB)

♦ High Common-Mode Rejection Ratio (90dB) and

Power-Supply Rejection Ratio (100dB)

♦ Temperature Range (-40°C to +125°C)

MAX4091/MAX4092/MAX4094

Single/Dual/Quad, Micropower, Single-Supply,

Rail-to-Rail Op Amps

________________________________________________________________ Maxim Integrated Products 1

OUT

OUT2

IN2-

IN2+

IN1+

IN1-

OUT1

µMAX/SO

TOP VIEW

N.C.

OUT

N.C.

IN+

IN-

N.C.

µMAX/SO

IN-

IN+

SOT23

OUT4

IN4-

IN4+

IN1+

IN1-

OUT1

IN3+

IN3-

OUT3

OUT2

IN2-

IN2+

TSSOP/SO

MAX4091

MAX4091 MAX4092

MAX4094

Pin Configurations/Functional Diagrams

19-2272; Rev 0; 1/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX4091AUK-T -40°C to +125°C 5 SOT23-5

MAX4091ASA -40°C to +125°C 8 SO

MAX4091AUA -40°C to +125°C 8 µMAX

MAX4092ASA -40°C to +125°C 8 SO

MAX4092AUA -40°C to +125°C 8 µMAX

MAX4094AUD -40°C to +125°C 14 TSSOP

MAX4094ASD -40°C to +125°C 14 SO

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc.

Summary of content (16 pages)

PAGE 1
9-2272; Rev 0; 1/02 Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps Features ♦ Low-Voltage, Single-Supply Operation (2.
PAGE 2
MAX4091/MAX4092/MAX4094 Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE) ....................................................7V Common-Mode Input Voltage..........(VCC + 0.3V) to (VEE - 0.3V) Differential Input Voltage .........................................±(VCC - VEE) Input Current (IN+, IN-) ....................................................±10mA Output Short-Circuit Duration OUT shorted to GND or VCC .............................
PAGE 3
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps (VCC = 2.7V to 6V, VEE = GND, VCM = 0, VOUT = VCC/2, TA = +25°C.) PARAMETER SYMBOL Input-Noise Voltage Density eN Input-Noise Current Density CONDITIONS MIN TYP THD + N Capacitive-Load Stability CLOAD Settling Time tS Power-On Time tON Op-Amp Isolation UNITS f = 10kHz 12 nV/√Hz f = 10kHz 1.5 pA/√Hz 16 µVRMS f = 1kHz, RL = 10kΩ, CL = 15pF, AV = 1, VOUT = 2VP-P 0.003 % AV = 1 2000 pF To 0.
PAGE 4
Typical Operating Characteristics (VCC = 5V, VEE = 0, TA = +25°C, unless otherwise noted.) GAIN AND PHASE vs. FREQUENCY 60 GAIN (dB) 40 20 0 PHASE -60 0 GAIN 60 0 20 PHASE 140 VCC 100 -60 0 VIN = 2.5V 120 MAX4091 toc03 120 40 GAIN (dB) GAIN 180 CL = 470pF AV = 1000 RL = ∞ 60 120 PHASE (DEGREES) 60 MAX4091 toc02 80 180 AV = 1000 NO LOAD PSRR (dB) MAX4091 toc01 80 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY PHASE (DEGREES) GAIN AND PHASE vs.
PAGE 5
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps 100 80 60 40 0 120 0 25 50 75 100 2 3 4 5 6 LARGE-SIGNAL GAIN vs. TEMPERATURE LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE 80 70 115 VCC = 2.7V RL TO VEE 60 110 RL = 1kW, 0.5V < VOUT < (VCC - 0.5V) RL TO VCC 100 VCC = 2.7V 95 VCC = 6V 500 RL = 1kW RL = 10kW 60 RL TO VCC 110 VCC = 6V 105 100 95 RL TO VEE 200 300 400 VOUT (mV) 500 600 400 500 600 180 RL TO VCC VCC = 6V, RL = 1kW 160 140 VCC = 2.
PAGE 6
Typical Operating Characteristics (continued) (VCC = 5V, VEE = 0, TA = +25°C, unless otherwise noted.) MAXIMUM OUTPUT VOLTAGE vs. TEMPERATURE OUTPUT IMPEDANCE vs. FREQUENCY VCC = 2.7V, RL = 1kW 120 100 80 VCC = 6V, RL = 100kW VCC = 2.7V, RL = 100kW 40 100 10 1 20 0 100 INPUT REFERRED 1 0.1 0.01 -60 -40 -20 0 20 40 60 80 100 120 140 10 0.1 1 10 100 1,000 10,000 0.01 10 FREQUENCY (kHz) FREQUENCY (kHz) CURRENT-NOISE DENSITY vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs.
PAGE 7
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps SINK CURRENT vs. OUTPUT VOLTAGE SOURCE CURRENT vs. SUPPLY VOLTAGE VDIFF = 100mV -2 OUTPUT CURRENT (mA) VIN 2V/div VOUT 2V/div -6 -8 -10 -12 -14 VCC = 2.7V -16 VCC = 6V VDIFF = 100mV 25 OUTPUT CURRENT (mA) -4 30 MAX4091 toc30 0 MAX4091 toc28 VCC = 5V, AV = -1, RL = 10kΩ MAX4091 toc29 LARGE-SIGNAL TRANSIENT RESPONSE VCC = 6V 20 15 10 VCC = 2.7V 5 -18 -20 0 0 20µs/div 0.5 1.0 1.5 2.0 2.5 3.0 1.0 2.
PAGE 8
MAX4091/MAX4092/MAX4094 Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps Detailed Description The single MAX4091, dual MAX4092 and quad MAX4094 op amps combine excellent DC accuracy with rail-to-rail operation at both input and output. With their precision performance, wide dynamic range at low supply voltages, and very low supply current, these op amps are ideal for battery-operated equipment, industrial, and data acquisition and control applications.
PAGE 9
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps Because the MAX4091/MAX4092/MAX4094 have excellent stability, no isolation resistor is required, except in the most demanding applications. This is beneficial because an isolation resistor would degrade the lowfrequency performance of the circuit. Power-Up Settling Time The MAX4091/MAX4092/MAX4094 have a typical supply current of 130µA per op amp.
PAGE 10
MAX4091/MAX4092/MAX4094 Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps Test Circuits/Timing Diagrams VCC = 3V VEE = 0 R2 VIN 1V/div R1 VIN VOUT MAX409_ VOUT 1V/div R3 R3 = R2 II R1 200µs/div Figure 1. Rail-to-Rail Input and Output Operation Figure 2a. Reducing Offset Error Due to Bias Current: Inverting Configuration R3 1.7kΩ VIN IN+ TO INTERNAL CIRCUITRY VOUT MAX409_ R2 R3 = R2 II R1 R1 IN– 1.7kΩ Figure 2b.
PAGE 11
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps 10,000 CAPACITIVE LOAD (pF) RL = ∞ UNSTABLE REGION VIN 50mV/div 1000 VOUT 50mV/div VCC = 5V VOUT = VCC/2 RL TO VEE AV = 1 100 1 10 100 10µs/div RESISTIVE LOAD (kΩ) Figure 4. Capacitive-Load Stable Region Sourcing Current Figure 5. MAX4092 Voltage Follower with 1000pF Load RL = 5kΩ RL = 20kΩ VIN 50mV/div VIN 50mV/div VOUT 50mV/div VOUT 50mV/div 10µs/div Figure 6a.
PAGE 12
MAX4091/MAX4092/MAX4094 Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps Test Circuits/Timing Diagrams (continued) RL = ∞ VIN 50mV/div RS VOUT MAX409_ CL VIN VOUT 50mV/div 10µs/div Figure 6c. MAX4092 Voltage Follower with 500pF Load (RL = ∞) VIN 50mV/div VIN 50mV/div VOUT 50mV/div VOUT 50mV/div 10µs/div Figure 8a. Driving a 5000pF Capacitive Load 12 Figure 7. Capacitive-Load Driving Circuit 10µs/div Figure 8b.
PAGE 13
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps 5V VCC VIN 1V/div 2 7 1kΩ 6 MAX409_ 3 VOUT 4 VOUT 500mV/div 1kΩ 5µs/div Figure 10a. Power-Up Settling Time (VCC = +3V) Figure 9. Power-Up Test Configuration VIN 2V/div VOUT 1V/div 5µs/div Figure 10b.
PAGE 14
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps 8LUMAXD.EPS SOT5L.
PAGE 15
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps SOICN.
PAGE 16
Single/Dual/Quad, Micropower, Single-Supply, Rail-to-Rail Op Amps TSSOP,NO PADS.EPS MAX4091/MAX4092/MAX4094 Package Information (continued) 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.