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

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The MAX1198 is a 3.3V, dual, 8-bit analog-to-digital converter (ADC) featuring fully differential wideband track-and-hold (T/H) inputs, driving two ADCs. The MAX1198 is optimized for low power, small size, and high-dynamic performance for applications in imaging, instrumentation, and digital communications. This ADC operates from a single 2.7V to 3.6V supply, consuming only 264mW, while delivering a typical signal-to-noise and distortion (SINAD) of 48.1dB at an input frequency of 50MHz and a sampling rate of 100Msps. The T/H-driven input stages incorporate 400MHz (-3dB) input amplifiers. The converters may also be operated with single-ended inputs. In addition to low operating power, the MAX1198 features a 3.2mA sleep mode, as well as a 0.15µA power-down mode to conserve power during idle periods.

An internal 2.048V precision bandgap reference sets the full-scale range of the ADC. A flexible reference structure allows the use of this internal or an externally applied reference, if desired, for applications requiring increased accuracy or a different input voltage range.

The MAX1198 features parallel, CMOS-compatible three-state outputs. The digital output format can be set to two's complement or straight offset binary through a single control pin. The device provides for a separate output power supply of 1.7V to 3.6V for flexible interfacing with various logic families. The MAX1198 is available in a 7mm x 7mm, 48-pin TQFP package, and is specified for the extended industrial (-40°C to +85°C) temperature range.

See a parametric table of the complete family of pin-compatible, 8-bit high-speed ADCs.

For a 10-bit, pin-compatible upgrade, refer to the MAX1180 data sheet. With the N.C. pins of the MAX1198 internally pulled down to ground, this ADC becomes a drop-in replacement for the MAX1180.

Key Features

Applications/Uses

Single 2.7V to 3.6V Operation
Excellent Dynamic Performance
- 48.1dB/47.6dB SINAD at f_IN = 50MHz/200MHz
- 66dBc/61.5dBc SFDR at f_IN = 50MHz/200MHz
-72dB Interchannel Crosstalk at f_IN = 50MHz
Low Power
- 264mW (Normal Operation)
- 10.6mW (Sleep Mode)
- 0.5µW (Shutdown Mode)
0.05dB Gain and ±0.1° Phase Matching
Wide ±1V_P-P Differential Analog Input Voltage Range
400MHz -3dB Input Bandwidth
On-Chip 2.048V Precision Bandgap Reference
User-Selectable Output Format—Two's Complement or Offset Binary
Pin-Compatible 8-Bit and 10-Bit Upgrades Available

	Baseband I/Q Sampling
	Battery-Powered Applications
	Instrumentation
	MMDS Modems
	Multichannel IF Sampling
	Set-Top Boxes
	Ultrasound and Medical Imaging
	VSAT Terminals
	WLAN, WWAN, WLL,

Key Specifications: High-Speed ADCs (> 5Msps)

Part Number

Resolution (Bits)

Sample Rate (max) (Msps)

SFDR (dBc)

SINAD (dB)

SNR (dB)

THD (db)

INL (±LSB)

DNL (±LSB)

Full-Power BW (MHz)

Data Bus Interface

Price^**

MAX1198

100

48.1

48.3

-64

0.3

0.2

400

µP/10

$10.49 @ 1k

See All High-Speed ADCs (> 5Msps) (81)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.