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 (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 is offered in the space-saving 10-bump chip-scale pack- age (UCSP™), providing 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 (32Ω) Audio Hands-Free Car Phones (Kits) Laptop/Notebook Computers/TFT Panels Sound P
The MAX4230‑MAX4234 family comprises single, dual and quad CMOS operational amplifiers with 30 mA peak output drive, rail‑to‑rail input and output, and a 10 MHz gain‑bandwidth product. They operate from a single 2.7 V to 5.5 V supply and feature a shutdown mode that reduces supply current to less than 1 pA.
These devices are intended for RF PA biasing in handheld wireless applications, portable audio, headphone drivers, and other battery‑powered circuits. Package options include 5‑pin SC70, 6‑pin UDFN, and 10‑bump UCSP for space‑constrained designs.
| Output Drive Capability | 30 mA |
|---|---|
| Rail‑to‑Rail Input/Output | Yes |
| Supply Current per Amplifier | 1.1 mA |
| Gain‑Bandwidth Product | 10 MHz |
| Slew Rate | 10 V/µs |
| Power‑Supply Rejection Ratio | 85 dB |
They can source or sink up to 30 mA of peak output current.
The gain‑bandwidth product is 10 MHz.