Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Multi-purpose uMAX 8

OUTIN-

15V

IN+

SOT23-5/SC70-5

TOP VIEW

- +

MAX4490

General Description

The MAX4490/MAX4491/MAX4492 single/dual/quad,

low-cost CMOS op amps feature Rail-to-Rail

input and

output capability from either a single 2.7V to 5.5V sup-

ply or dual ±1.35V to ±2.75V supplies. These amplifiers

exhibit a high slew rate of 10V/µs and a gain-bandwidth

product of 10MHz. They can drive 2kΩ resistive loads

to within 55mV of either supply rail and remain unity-

gain stable with capacitive loads up to 300pF.

The MAX4490 is offered in the ultra-small, 5-pin SC70

package, which is 50% smaller than the standard 5-pin

SOT23 package. Specifications for all parts are guaran-

teed over the automotive (-40°C to +125°C) tempera-

ture range.

Applications

Battery-Powered Instruments

Portable Equipment

Audio Signal Conditioning

Low-Power/Low-Voltage Applications

Sensor Amplifiers

RF Power Amplifier Control

High-Side/Low-Side Current Sensors

Features

♦ 2.7V to 5.5V Single-Supply Operation

♦ 10V/µs Slew Rate

♦ Rail-to-Rail Input Common-Mode Voltage Range

♦ Rail-to-Rail Output Voltage Swing

♦ 10MHz Gain-Bandwidth Product

♦ Unity-Gain Stable with Capacitive Loads

Up to 300pF

♦ 50pA Input Bias Current

♦ Ultra-Small, 5-Pin SC70 Package (MAX4490)

MAX4490/MAX4491/MAX4492

Low-Cost, High-Slew-Rate,

Rail-to-Rail I/O Op Amps in SC70

________________________________________________________________ Maxim Integrated Products 1

19-1525; Rev 2; 4/01

PART

MAX4490AXK-T

MAX4490AUK-T

MAX4491AKA-T

-40°C to +125°C

TEMP RANGE

PIN-

PACKAGE

5 SC70-5

5 SOT23-5

8 SOT23-5

Capacitive-Load Stability

Ordering Information

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

MAX4492AUD

-40°C to +125°C 14 TSSOP

MAX4492ASD -40°C to +125°C 14 SO

TOP

MARK

AAB

ADKQ

AADB

—

100 100k10k1k

2000

4000

3000

6000

1000

5000

RESISTIVE LOAD (Ω)

CAPACITIVE LOAD (pF)

UNSTABLE

STABLE

Pin Configurations/

Functional Diagrams

Pin Configurations continued at end of data sheet.

MAX4491AUA -40°C to +125°C 8 µMAX —

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.

Summary of content (8 pages)

PAGE 1
9-1525; Rev 2; 4/01 Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC70 Features ♦ 2.7V to 5.
PAGE 2
MAX4490/MAX4491/MAX4492 Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC70 ABSOLUTE MAXIMUM RATINGS Supply Voltage (VDD to VSS) ....................................................6V All Other Pins ...................................(VSS - 0.3V) to (VDD + 0.3V) Output Short-Circuit Duration .................................................10s Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (derate 2.5mW/°C above +70°C) ............ 200mW 5-Pin SOT23 (derate 7.1mW/°C above +70°C)..........
PAGE 3
Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC70 650 VDD = 2.7V 600 700 600 500 400 300 -0.8 -1.0 -1.2 -1.4 200 -1.6 100 -1.8 -2.0 2.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 3.0 3.5 4.0 4.5 5.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 5.5 SUPPLY VOLTAGE (V) TEMPERATURE (°C) OUTPUT SWING HIGH vs. TEMPERATURE OUTPUT SWING LOW vs. TEMPERATURE OP AMP GAIN AND PHASE vs. FREQUENCY 70 VDD = 2.7V RL = 2kΩ 40 30 50 10 0 90 GAIN 40 20 VDD = 5V OR 2.
PAGE 4
Typical Operating Characteristics (continued) (VDD = 5V, VSS = 0, VCM = VDD/2, RL = 100kΩ to VDD/2, TA = +25°C, unless otherwise noted.) 100 AV = 1V/V 2Vp-p SIGNAL 500kHz LOWPASS FILTER 0.035 0.030 THD + NOISE (%) RL = 2kΩ 10 1 MAX4490toc12 AV = 1 MAX4490 toc11 0.040 MAX4490 toc10 1k LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY OUTPUT IMPEDANCE vs. FREQUENCY IN V/div 0.025 0.020 0.015 RL = 10kΩ 0.010 0.1 OUT V/div 0.005 0.
PAGE 5
Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC70 PIN NAME FUNCTION MAX4490 MAX4491 MAX4492 1 — — IN+ Noninverting Input 2 4 11 VSS Negative Supply Input. Connect to ground for single-supply operation.
PAGE 6
pole at frequency (2πR′CIN)-1, where R′ is the parallel combination of the gain-setting resistors for the inverting or noninverting amplifier configuration (Figure 2). If the pole frequency is less than or comparable to the unity-gain bandwidth (10MHz), the phase margin will be reduced, and the amplifier will exhibit degraded AC performance through either ringing in the step response or sustained oscillations. The pole frequency is 10MHz when R′ = 3.2kΩ. To maximize stability, R′ <3kΩ is recommended.
PAGE 7
Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC70 Improve stability for large capacitive loads by adding an isolation resistor (typically 10Ω) in series with the output (Figure 5). Note that the isolation resistor forms a voltage divider with potential for gain error.
PAGE 8
Pin Configurations/ Functional Diagrams (continued) TOP VIEW 14 OUTD OUTA 1 VIN OUTA RS VOUT MAX4490 CLOAD 1 INA- 2 INA+ 3 VSS 4 - + MAX4491 + - SOT23-8/µMAX 8 VDD INA- 2 INA+ 3 7 OUTB 6 INB- VDD 4 5 INB+ INB+ 5 INB- 6 - + + - 13 IND12 IND+ 11 VSS MAX4492 10 INC+ + - + - OUTB 7 9 INC- 8 OUTC TSSOP/SO Figure 5. Isolation Resistor for Large Capacitive Loads Package Information SC70, 5L.