High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70

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 single 2.7V to 5.5V supply. These amplifiers exhibit high slew rate of 10V/µs and a gain-bandwidth product (GBWP) of 10MHz. The MAX4230–MAX4234 can drive typical headset 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 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 circuitry, biasing RF PAs in wireless headsets. The MAX4231/MAX4233 offer a active-low 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

* Audio Hands-Free Car Phones (Kits) * Digital-to-Analog Converter Buffers * Motor Drivers * Portable Headphone Speaker Drivers (32Ω) * Portable/Battery-Powered Audio Applications * RF PA Biasing Controls in Handset Applications * Tablet/Notebook Computers * Transformer/Line Drivers

* Optimized for Headsets and High-Current Outputs

* 200mA Output Drive Capability

* 100dB Voltage Gain (RL = 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 Amplifier

* Low-Power Shutdown Mode Reduces Supply Current to < 1µA

* Small Package Options

* Tiny, 2.1mm x 2.0mm Space-Saving SC70 Package

* AEC-Q100 Qualified, Refer to Ordering Information for the List of /V Parts