MAXIM MAX1191 Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC User Manual Data Sheet

19-2836; Rev 1; 9/03

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC General Description Features

The MAX1191 is an ultra-low-power, dual, 8-bit, Ultra-Low Power 7.5Msps analog-to-digital converter (ADC). The device

12m W (Normal Operation: 7.5Msps)

features two fully differential wideband track-and-hold

0.3µW (Shutdown Mode)

(T/H) inputs. These inputs have a 440MHz bandwidth

Excellent Dynamic Performance

and accept fully differential or single-ended signals.

The MAX1191 delivers a typical signal-to-noise and dis- 48.7d B SNR at f IN = 1.875MHz

tortion (SINAD) of 48.6d B at an input frequency of 69d Bc SFDR at f IN = 1.875MHz 1.875MHz and a sampling rate of 7.5Msps while con-

2.7V to 3.6V Single Analog Supply

suming only 12m W. This ADC operates from a 2.7V to

1.8V to 3.6V TTL/CMOS-Compatible Digital

3.6V analog power supply. A separate 1.8V to 3.6V

supply powers the digital output driver. In addition to Outputs

ultra-low operating power, the MAX1191 features three Fully Differential or Single-Ended Analog Inputs power-down modes to conserve power during idle peri-

Internal/External Reference Option

ods. Excellent dynamic performance, ultra-low power, and small size make the MAX1191 ideal for applica- Multiplexed CMOS-Compatible Tri-State Outputs tions in imaging, instrumentation, and digital communi-

28-Pin Thin QFN Package

cations.

Evaluation Kit Available (Order MAX1193EVKIT)

An internal 1.024V precision bandgap reference sets the full-scale range of the ADC to ±0.512V. A flexible

Ordering Information

reference structure allows the MAX1191 to use its inter- nal reference or accept an externally applied reference

PART TEMP RANGE PIN-PACKAGE

for applications requiring increased accuracy.

28 Thin QFN-EP*

The MAX1191 features parallel, multiplexed, CMOS- MAX1191ETI-T -40°C to +85°C

RE FP (5mm x 5mm)

compatible tri-state outputs. The digital output format is

offset binary. A separate digital power input accepts a RE FN *EP = Exposed paddle.

voltage from 1.8V to 3.6V for flexible interfacing to dif-

OG NDGN CO

ferent logic levels. The MAX1191 is available in a 5mm 5mm, 28-pin thin QFN package, and is specified for

OV DD RE FI

the extended industrial (-40°C to +85°C) temperature Pin Configuration

range. PD

For higher sampling frequency applications, refer to the TOP VIEW

D6D7 PD

MAX1195–MAX1198 dual 8-bit ADCs. Pin-compatible versions of the MAX1191 are also available. Refer to the MAX1192 data sheet for 22Msps, and the MAX1193 data sheet for 45Msps.

INA- D0

Applications

INA+ D1

Ultrasound and Medical Imaging

GND D2

IQ Baseband Sampling

CLK D3

Battery-Powered Portable Instruments MAX1191

GND A/B

Low-Power Video

WLAN, Mobile DSL, WLL Receiver INB+ D4

EXPOSED PADDLE

INB- D5

5mm x 5mm THIN QFN

Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.