General Description

The MAX186/MAX188 are 12-bit data-acquisition systems that combine an 8-channel multiplexer, high bandwidth 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 PDIP, SO, SSOP Packages
♦ Evaluation Kit Available

Applications

Portable Data Logging
Data-Acquisition
High-Accuracy Process Control
Automatic Testing
Robotics
Battery-Powered Instruments
Medical Instruments