MAXIM MAX1198 Dual 8-bit 100Msps 3.3V Low-Power ADC with Internal Reference and Parallel Outputs

19-2412; Rev 0; 4/02

Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC with Internal Reference and Parallel Outputs General Description Features The MAX1198 is a 3.3V, 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 MAX1198

48.1d B/47.6d B SINAD at f IN = 50MHz/200MHz

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

performance for applications in imaging, instrumenta- 66d Bc/61.5d Bc SFDR at f IN = 50MHz/200MHz

tion, and digital communications. This ADC operates -72d B Interchannel Crosstalk at f IN = 50MHz from a single 2.7V to 3.6V supply, consuming only

Low Power

264m W, while delivering a typical signal-to-noise and

264m W (Normal Operation)

distortion (SINAD) of 48.1d B at an input frequency of

10.6m W (Sleep Mode)

50MHz and a sampling rate of 100Msps. The T/H-driven

0.5µW (Shutdown Mode)

input stages incorporate 400MHz (-3d B) input ampli-

fiers. The converters may also be operated with single- 0.05d B Gain and ±0.1° Phase Matching

ended inputs. In addition to low operating power, the

Wide ±1VP-P Differential Analog Input Voltage

MAX1198 features a 3.2m A sleep mode, as well as a

Range

0.15µA power-down mode to conserve power during

400MHz -3d B Input Bandwidth

idle periods.

An internal 2.048V precision bandgap reference sets On-Chip 2.048V Precision Bandgap Reference

the full-scale range of the ADC. A flexible reference

User-Selectable Output Format—Two’s

structure allows the use of this internal or an externally

Complement or Offset Binary

applied reference, if desired, for applications requiring

Pin-Compatible 8-Bit and 10-Bit Upgrades

increased accuracy or a different input voltage range.

GN RE FN

Available

The MAX1198 features parallel, CMOS-compatible three- RE FP state outputs. The digital output format can be set to two’s RE FI

Ordering Information

GN RE FO UT

complement or straight offset binary through a single con-

trol pin. The device provides for a separate output power PART TEMP RANGE PIN-PACKAGE

SL EE D6

supply of 1.7V to 3.6V for flexible interfacing with various MAX1198ECM -40°C to +85°C 48 TQFP-EP*

PD D5

logic families. The MAX1198 is available in a 7mm x 7mm,

OE D4 *EP = Exposed paddle

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

Functional Diagram and Pin Compatible Upgrades table

industrial (-40°C to +85°C) temperature range. D6 D2

appear at end of data sheet.

Pin-compatible lower speed versions of the MAX1198 D5 D1 D4 D0 Pin Configuration

are also available. Refer to the MAX1195 data sheet for 40Msps and the MAX1197 data sheet for 60Msps. In addition to these speed grades, this family includes a multiplexed output version (MAX1196, 40Msps), for which digital data is presented time interleaved and on a single, parallel 8-bit output port.

COM N.C.

For a 10-bit, pin-compatible upgrade, refer to the

VDD N.C.

MAX1180 data sheet. With the N.C. pins of the GND OGND MAX1198 internally pulled down to ground, this ADC INA+ OVDD

becomes a drop-in replacement for the MAX1180. INA- OVDD VDD OGND

Applications MAX1198

GND N.C. INB- N.C.

Baseband I/Q Sampling WLAN, WWAN, WLL,

INB+ D0B

MMDS Modems GND D1B

Multichannel IF Sampling

VDD D2B

Ultrasound and Medical Set-Top Boxes

CLK D3B

Imaging

VSAT Terminals

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.