Ultra-Low-Power, 7.5Msps, Dual, 8-Bit ADC

The MAX1191 is an ultra-low-power, dual, 8-bit, 7.5Msps analog-to-digital converter (ADC). The device features two fully differential wideband track-and-hold (T/H) inputs. These inputs have a 440MHz bandwidth and accept fully differential or single-ended signals. The MAX1191 delivers a typical signal-to-noise and distortion (SINAD) of 48.6dB at an input frequency of 1.875MHz and a sampling rate of 7.5Msps while consuming only 12mW. This ADC operates from a 2.7V to 3.6V analog power supply. A separate 1.8V to 3.6V supply powers the digital output driver. In addition to ultra-low operating power, the MAX1191 features three power-down modes to conserve power during idle periods. Excellent dynamic performance, ultra-low power, and small size make the MAX1191 ideal for applications in imaging, instrumentation, and digital communications.

An internal 1.024V precision bandgap reference sets the full-scale range of the ADC to ±0.512V. A flexible reference structure allows the MAX1191 to use its internal reference or accept an externally applied reference for applications requiring increased accuracy.

The MAX1191 features parallel, multiplexed, CMOS-compatible tri-state outputs. The digital output format is offset binary. A separate digital power input accepts a voltage from 1.8V to 3.6V for flexible interfacing to different logic levels. The MAX1191 is available in a 5mm x 5mm, 28-pin thin QFN package, and is specified for the extended industrial (-40°C to +85°C) temperature range.

Applications

* Battery-Powered Portable Instruments

* IQ Baseband Sampling

* Low-Power Video

* Ultrasound and Medical Imaging

* WLAN, Mobile DSL, WLL Receiver

* Ultra-Low Power

* 12mW (Normal Operation: 7.5Msps)

* 0.3µW (Shutdown Mode)

* Excellent Dynamic Performance

* 48.7dB SNR at fIN = 1.875MHz

* 69dBc SFDR at fIN = 1.875MHz

* 2.7V to 3.6V Single Analog Supply

* 1.8V to 3.6V TTL/CMOS-Compatible Digital Outputs

* Fully Differential or Single-Ended Analog Inputs

* Internal/External Reference Option

* Multiplexed CMOS-Compatible Tri-State Outputs

* 28-Pin Thin QFN Package

* Evaluation Kit Available (Order MAX1193EVKIT)