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 the 6-pin SC70 package and a 1.5mm x 1.0mm x 0.5mm
ultra-thin µDFN package. 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.
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).
Key Features
Applications/Uses
30mA Output Drive Capability
Rail-to-Rail Input and Output
1.1mA Supply Current per Amplifier
2.7V to 5.5V Single-Supply Operation
10MHz Gain-Bandwidth Product
High Slew Rate: 10V/µs
100dB Voltage Gain (RL = 100kΩ)
85dB Power-Supply Rejection Ratio
No Phase Reversal for Overdriven Inputs
Unity-Gain Stable for Capacitive Loads to 780pF
Low-Power Shutdown Mode Reduces Supply Current to < 1µA
Available in 5-Pin SC70 Package (MAX4230) and 6-Pin Thin µDFN Package (MAX4231)
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