Datasheet
General Description
The MAX4230–MAX4234 single/dual/quad, high-output
drive CMOS op amps feature 200mA of peak output cur-
rent, 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 head-
set levels (32Ω), 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
a 6-pin SC70 package and in 1.5mm x 1.0mm UCSP
and thin μDFN packages. The dual op-amp MAX4233 is
offered in the space-saving 10-bump chip-scale package
(UCSP™), providing the smallest footprint area for a dual
op amp with shutdown.
These op amps are designed to be part of the PA control cir-
cuitry, 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 disabled when needed,
preventing unconverted signals to the RF antenna.
Applications
● RF PA Biasing Controls in Handset Applications
● Portable/Battery-Powered Audio Applications
● Portable Headphone Speaker Drivers (32Ω)
● Audio Hands-Free Car Phones (Kits)
● Tablet/Notebook Computers
● Digital-to-Analog Converter Buffers
● Transformer/Line Drivers
● Motor Drivers
Benets and Features
● Optimized for Headsets and High-Current Outputs
• 200mA Output Drive Capability
• 100dB Voltage Gain (R
L
= 100kΩ)
• 85dB Power-Supply Rejection Ratio
• No Phase Reversal for Overdriven Inputs
• Unity-Gain Stable for Capacitive Loads to 780pF
● Suitable for High-Bandwidth Applications
• 10MHz Gain-Bandwidth Product
• High Slew Rate: 10V/μs
● Extends the Battery Life of Portable Applications
• 1.1mA Supply Current per Amplier
● Low-Power Shutdown Mode Reduces Supply Current
to < 1μA
● Small Package Options
• Tiny, 2.1mm x 2.0mm Space-Saving SC70 Package
Selector Guide appears at end of data sheet.
Pin/Bump Configurations appear at end of data sheet.
Ordering Information continued at end of data sheet.
Visit www.maximintegrated.com/products/patents for product
patent marking information.
UCSP is a trademark of Maxim Integrated Products, Inc.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
MAX4230AXK+T -40°C to +125°C 5 SC70 ACS
MAX4230AXK/V+T -40°C to +125°C 5 SC70 +AUU
MAX4230AUK+T -40°C to +125°C 5 SOT23 ABZZ
MAX4231AXT+T -40°C to +125°C 6 SC70 ABA
MAX4231AUT+T -40°C to +125°C 6 SOT23 ABNF
MAX4231ART+T -40°C to +125°C 6 UCSP AAM
MAX4231AYT+T -40°C to +125°C
6 Thin µDFN
(Ultra-Thin LGA)
+AH
MAX4231
DAC
SHDN
C
R
F
R
ISO
C
LOAD
I
LOAD
= 30mA
ANTENNA
R
PA
2.7V TO 5.5V
MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
19-2164; Rev 19; 1/15
Typical Operating Circuit
Ordering Information