Analogue, Mixed Signal, LSI


Ultra low-power 8-bit ADC offers dynamic performance

16 July 2003 Analogue, Mixed Signal, LSI

The MAX1191 is an ultra-low-power, dual, 8-bit, 7,5 Msps analog-to-digital converter from Maxim that features two fully differential wideband track-and-hold (T/H) inputs. These inputs have a 440 MHz bandwidth and accept fully differential or single-ended signals. The MAX1191 delivers a typical signal-to-noise and distortion (SINAD) of 48,6 dB at an input frequency of 1,875 MHz and a sampling rate of 7,5 Msps while consuming only 12 mW.

This ADC operates from a 2,7 V to 3,6 V analog power supply. A separate 1,8 V to 3,6 V supply powers the digital output driver for flexible interfacing to different logic levels. In addition to ultra-low operating power, the device features three power-down modes to conserve power during idle periods. An internal 1,024 V precision bandgap reference sets the full-scale range of the ADC to ±0,512 V. A flexible reference structure allows the MAX1191 to use its internal reference or accept an externally applied reference for applications that require increased accuracy.

The MAX1191 features parallel, multiplexed, CMOS-compatible tri-state outputs. The digital output format is offset binary. With superior dynamic performance, ultra-low power, and small size, the MAX1191 is ideal for applications in imaging, instrumentation, and digital communications. It is available in a 28-pin thin QFN package, specified for -40 to +85°C.



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