MAXIM MAX1195 Dual, 8-Bit, 40Msps, 3V, Low-Power ADC with Internal Reference and Parallel Outputs

19-2410; Rev 0; 4/02

Dual, 8-Bit, 40Msps, 3V, Low-Power ADC with Internal Reference and Parallel Outputs General Description Features The MAX1195 is a 3V, dual, 8-bit analog-to-digital con- Single 2.7V to 3.6V Operation verter (ADC) featuring fully differential wideband track-

Excellent Dynamic Performance

and-hold (T/H) inputs, driving two ADCs. The MAX1195

48.5d B/46.7d B SINAD at f IN = 20MHz/200MHz

is optimized for low-power, small size, and high-dynamic

performance for applications in imaging, instrumentation 68.7d Bc/55.7d Bc SFDR at f IN = 20MHz/200MHz

and digital communications. This ADC operates from a -72d B Interchannel Crosstalk at f IN = 20MHz single 2.7V to 3.6V supply, consuming only 87m W while

Low Power

delivering a typical signal-to-noise and distortion (SINAD)

87m W (Normal Operation)

of 48.5d B at an input frequency of 20MHz and a sam-

9m W (Sleep Mode)

pling rate of 40Msps. The T/H-driven input stages incor-

0.3µW (Shutdown Mode)

porate 400MHz (-3d B) input amplifiers. The converters

may also be operated with single-ended inputs. In addi- 0.05d B Gain and ±0.05° Phase Matching

tion to low operating power, the MAX1195 features a

Wide ±1VP-P Differential Analog Input Voltage

3m A sleep mode as well as a 0.1µA power-down mode

Range

to conserve power during idle periods.

400MHz -3d B Input Bandwidth

An internal 2.048V precision bandgap reference sets

the full-scale range of the ADC. A flexible reference On-Chip 2.048V Precision Bandgap Reference

structure allows the use of this internal or an externally

User-Selectable Output Format—Two’s

applied reference, if desired, for applications requiring

Complement or Offset Binary

increased accuracy or a different input voltage range.

Pin-Compatible 8-Bit and 10-Bit Upgrades

The MAX1195 features parallel, CMOS-compatible three- GN RE FN

Available

state outputs. The digital output format can be set to two’s RE FP

complement or straight offset binary through a single con- RE FI

Ordering Information

trol pin. The device provides for a separate output power GN RE FO UT T/ D7

supply of 1.7V to 3.6V for flexible interfacing with various PART TEMP RANGE PIN-PACKAGE

SL EE D6

logic families. The MAX1195 is available in a 7mm x 7mm, MAX1195ECM -40°C to +85°C 48 TQFP-EP*

PD D5

48-pin TQFP package, and is specified for the extended

OE D4 *EP = Exposed paddle

industrial (-40°C to +85°C) temperature range.

D7 D3 Functional Diagram and Pin Compatible Upgrades table

Pin-compatible higher speed versions of the MAX1195 D6 D2

appear at end of data sheet.

are also available. Refer to the MAX1197 data sheet for D5 D1

D4 D0 Pin Configuration

60Msps and the MAX1198 data sheet for 100Msps. In addition to these speed grades, this family will include a multiplexed output version (MAX1196, 40Msps), for which digital data is presented time interleaved and on a single, parallel 8-bit output port. For a 10-bit, pin-compatible upgrade, refer to the

COM N.C.

MAX1183 data sheet. With the N.C. pins of the MAX1195 VDD N.C. internally pulled down to ground, this ADC becomes a GND OGND

drop-in replacement for the MAX1183. INA+ OVDD

INA- OVDD Applications VDD OGND

MAX1195

GND N.C.

Baseband I/Q Sampling WLAN, WWAN, WLL,

INB- N.C.

MMDS Modems INB+ D0B

Multichannel IF Sampling

GND D1B

Set-Top Boxes

Ultrasound and Medical

VDD D2B

Imaging VSAT Terminals

CLK D3B

Battery-Powered Instrumentation

TQFP-EP

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.