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General Description

The MAX1132/MAX1133 are 200ksps, 16-bit ADCs. These serially interfaced ADCs connect directly to SPI?, QSPI?, and MICROWIRE? devices without external logic. They combine an input scaling network, internal track/hold, clock, a +4.096V reference, and three general-purpose digital output pins (for external multiplexer or PGA control) in a 20-pin SSOP package. The excellent dynamic performance (SINAD ≥ 85dB), high-speed (200ksps), and low power (7.5mA) of these ADCs, make them ideal for applications such as industrial process control, instrumentation, and medical applications. The MAX1132 accepts input signals of 0 to +12V (unipolar) or ±12V (bipolar), while the MAX1133 accepts input signals of 0 to +4.096V (unipolar) or ±4.096V (bipolar). Operating from a single +4.75V to +5.25V analog supply and a +4.75V to +5.25V digital supply, power-down modes reduce current consumption to 1mA at 10ksps and further reduce supply current to less than 20μA at slower data rates. A serial strobe output (SSTRB) allows direct connection to the TMS320 family of digital signal proces sors. The MAX1132/MAX1133 user can select either the internal clock, or an external serial-interface clock for the ADC to perform analog-to-digital conversions.

Features

? 200ksps (Bipolar) and 150ksps (Unipolar) Sampling ADC

? 16-Bits, No Missing Codes

? 1.5LSB INL Guaranteed

? 85dB (min) SINAD

? +5V Single-Supply Operation

? Low-Power Operation, 7.5mA (Unipolar Mode)

? 2.5μA Shutdown Mode

? Software-Configurable Unipolar and Bipolar Input Ranges

0 to +12V and ±12V (MAX1132)

0 to +4.096V and ±4.096V (MAX1133)

Internal or External Reference

? Internal or External Clock

? SPI/QSPI/MICROWIRE-Compatible Serial Interface

? Three User-Programmable Logic Outputs

? Small 20-Pin SSOP Package

Applications

Industrial Process Control

Industrial I/O Modules

Data-Acquisition Systems

Medical Instruments

Portable and Battery-Powered Equipment