General Description

The MAX186/MAX188 are 12-bit data-acquisition systems that combine an 8-channel multiplexer, high-band-width track/hold, and serial interface together with high conversion speed and ultra-low power consumption. The devices operate with a single +5V supply or dual ±5V supplies. The analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.

The 4-wire serial interface directly connects to SPI™, QSPI™ and Microwire™ devices without external logic. A serial strobe output allows direct connection to TMS320 family digital signal processors. The MAX186/MAX188 use either the internal clock or an external serial-interface clock to perform successive-approximation A/D conversions. The serial interface can operate beyond 4MHz when the internal clock is used.

Features

♦ 8-Channel Single-Ended or 4-Channel

Differential Inputs

♦ Single +5V or ±5V Operation

♦ Low Power: 1.5mA (operating mode)

2µA (power-down mode)

♦ Internal Track/Hold, 133kHz Sampling Rate

♦ Internal 4.096V Reference (MAX186)

♦ SPI-, QSPI-, Microwire-, TMS320-Compatible

4-Wire Serial Interface

♦ Software-Configurable Unipolar or Bipolar Inputs

♦ 20-Pin DIP, SO, SSOP Packages

♦ Evaluation Kit Available

Applications

Portable Data Logging

Data-Acquisition

High-Accuracy Process Control

Automatic Testing

Robotics

Battery-Powered Instruments

Medical Instruments