General Description

The MAX4230–MAX4234 single/dual/quad, high-output-

drive CMOS op amps feature 200mA of peak output

current, rail-to-rail input, and output capability from a

single 2.7V to 5.5V supply. These amplifiers exhibit a

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

(GBWP) of 10MHz. The MAX4230–MAX4234 can drive

typical headset levels (32

Ω), as well as bias an RF

power amplifier (PA) in wireless handset applications.

The MAX4230 comes in a tiny 5-pin SC70 package and

the MAX4231, single with shutdown, is offered in the

6-pin SC70 package. The dual op-amp MAX4233 is

offered in the space-saving 10-bump UCSP™, provid-

ing the smallest footprint area for a dual op amp with

shutdown.

These op amps are designed to be part of the PA con-

trol circuitry, biasing RF PAs in wireless headsets. The

MAX4231/MAX4233 offer a SHDN feature that drives

the output low. This ensures that the RF PA is fully dis-

abled when needed, preventing unconverted signals to

the RF antenna.

The MAX4230 family offers low offsets, wide bandwidth,

and high-output drive in a tiny 2.1mm x 2.0mm space-

saving SC70 package. These parts are offered over the

automotive temperature range (-40°C to +125°C).

Applications

RF PA Biasing Controls in Handset Applications

Portable/Battery-Powered Audio Applications

Portable Headphone Speaker Drivers (32

Ω)

Audio Hands-Free Car Phones (Kits)

Laptop/Notebook Computers/TFT Panels

Sound Ports/Cards

Set-Top Boxes

Digital-to-Analog Converter Buffers

Transformer/Line Drivers

Motor Drivers

Features

o 30mA Output Drive Capability

o Rail-to-Rail Input and Output

o 1.1mA Supply Current per Amplifier

o 2.7V to 5.5V Single-Supply Operation

o 10MHz Gain-Bandwidth Product

o High Slew Rate: 10V/µs

o 85dB Power-Supply Rejection Ratio

o No Phase Reversal for Overdriven Inputs

o Unity-Gain Stable for Capacitive Loads to 780pF

o Low-Power Shutdown Mode Reduces Supply

Current to <1µA

o Available in 5-Pin SC70 Package (MAX4230)

o Available in 10-Bump UCSP Package (MAX4233)

High-Output-Drive, 10MHz, 10V/µs,

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

________________________________________________________________ Maxim Integrated Products

1

19-2164; Rev 4; 5/04

Ordering Information continued at end of data sheet.

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.

Selector Guide appears at end of data sheet.

Pin Configurations appear at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX4230AXK-T

-40°C to +125°C

5 SC70-5

ACS

MAX4230AUK-T

-40°C to +125°C

5 SOT23-5

ABZZ

MAX4231AXT-T

-40°C to +125°C

6 SC70-6

ABA

MAX4231AUT-T

-40°C to +125°C

6 SOT23-6

AAUV

Typical Operating Circuit

MAX4231

DAC

PA

2.7V TO 5.5V

ANTENNA

C

SHDN