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 MAX4230AXK 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.
Feature
- 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
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
