Serial Output, 250ksps, 12-Bit ADC with Track/Hold and Reference

The MAX176 is a complete analog-to-digital converter (ADC) that achieves a 250k samples per second (ksps) sampling rate by combining a fast track/hold (0.4µs max acquisition time), a 3.5µs ADC, and a buried-zener volt­age reference. The device also saves space with serial interface and 8-pin DIP or 16-pin surface-mount SO pack­ages.

Supply and reference decoupling capacitors are the only external components needed. The CLOCK input can be driven from an external divided-down microprocessor clock or from the serial-clock output of a microcontroller. The MAX176 works with +5V and -12V to -1 SV supply voltages ( 148mW typ power dissipation).

The MAX176's 3-wire serial interface works with general ­purpose serial-to-parallel converters, such as the 74HC595. as well as with digital-signal processors and microcontrollers. Its 3-wire serial interlace is fully com­patible with SPI, OSPI and Microwire™ interface stan­dards.

APPLICATIONS

* Telecommunications

* Digital-Signal Processing (DSP)

* Sonar/Radar Signal Processing

* Industrial Data Acquisition

* 12-Bit Resolution and Linearity

* 0.4µs Track/Hold Acquisition Time

* 3.5µs Max Conversion Time

* 250ksps Sampling Rate

* SPI-, QSPI- and Microwire'"-Compatible Serial Output