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 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 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 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).
The MAX4230‑MAX4234 family are single, dual, and quad CMOS operational amplifiers offering 200 mA peak output drive, rail‑to‑rail input and output, and a 10 V/µs slew rate. They operate from a single 2.7 V to 5.5 V supply and are available in ultra‑small SC70, UCSP, and thin‑UDFN packages suitable for space‑constrained designs.
These amplifiers are intended for RF PA biasing in handsets, portable audio, headset drivers, car‑phone kits, laptop audio, set‑top boxes, DAC buffers, transformer drivers, and motor drivers. Key features include a 10 MHz gain‑bandwidth product, 85 dB PSRR, low‑power shutdown (< 1 pA), and automotive temperature range (‑40 °C to +125 °C).
| Peak Output Drive | 200 mA |
|---|---|
| Input/Output Range | Rail‑to‑Rail |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Gain‑Bandwidth Product | 10 MHz |
| Power‑Supply Rejection Ratio | 85 dB |
| Shutdown Supply Current | < 1 pA |
The amplifiers can deliver up to 200 mA of peak output current.
They operate from a single supply of 2.7 V to 5.5 V.
In shutdown mode the supply current is reduced to less than 1 pA.
The gain‑bandwidth product is 10 MHz.