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MAX1211

65Msps, 12-Bit, IF Sampling ADC

Maxim Integrated 

19-2922; Rev 1; 5/04

EVAALVUAAILTAIOBNLEKIT

65Msps, 12-Bit, IF Sampling ADC

General Description

The MAX1211 is a 3.3V, 12-bit analog-to-digital convert-

er (ADC) featuring a fully differential wideband track-

and-hold (T/H) input, driving the internal quantizer. The

MAX1211 is optimized for low power, small size, and

high dynamic performance in intermediate frequency

(IF) sampling applications. This ADC operates from a

single 3.0V to 3.6V supply, consuming only 340mW

while delivering a typical signal-to-noise ratio (SNR) per-

formance of 66.8dB at a 175MHz input frequency. The

T/H-driven input stage accepts single-ended or differen-

tial inputs. In addition to low operating power, the

MAX1211 features a 0.15mW power-down mode to con-

serve power during idle periods.

A flexible reference structure allows the MAX1211 to

use its internal precision bandgap reference or accept

an externally applied reference. A common-mode refer-

ence is provided to simplify design and reduce external

component count in differential analog input circuits.

The MAX1211 supports both a single-ended and differ-

ential input clock drive. Wide variations in the clock

duty cycle are compensated with the ADC’s internal

duty-cycle equalizer.

The MAX1211 features parallel, CMOS-compatible out-

puts. The digital output format is pin selectable to be

either two’s complement or Gray code. A data-valid indi-

cator eliminates external components that are normally

required for reliable digital interfacing. A separate power

input for the digital outputs accepts a voltage from 1.7V

to 3.6V for flexible interfacing with various logic levels.

The MAX1211 is available in a 6mm x 6mm x 0.8mm, 40-

pin thin QFN package with exposed paddle (EP), and is

specified for the extended industrial (-40°C to +85°C)

temperature range.

Applications

IF and Baseband Communication Receivers

Cellular, LMDS, Point-to-Point Microwave,

MMDS, HFC, WLAN

Ultrasound and Medical Imaging

Portable Instrumentation

Low-Power Data Acquisition

Features

♦ Direct IF Sampling Up to 400MHz

♦ 700MHz Input Bandwidth

♦ Excellent Dynamic Performance

66.8dB SNR at fIN = 175MHz

79.7dBc SFDR at fIN = 175MHz

♦ 3.3V Low-Power Operation

314mW (Single-Ended Clock Mode)

340mW (Differential Clock Mode)

♦ Differential or Single-Ended Clock

♦ Accepts 20% to 80% Clock Duty Cycle

♦ Fully Differential or Single-Ended Analog Input

♦ Adjustable Full-Scale Analog Input Range

♦ Common-Mode Reference

♦ Power-Down Mode

♦ CMOS-Compatible Outputs in Two’s Complement

or Gray Code

♦ Data-Valid Indicator Simplifies Digital Interface

♦ Out-of-Range Indicator

♦ Miniature, 40-Pin Thin QFN Package with Exposed

Paddle

♦ Evaluation Kit Available (Order MAX1211EVKIT)

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX1211ETL -40°C to +85°C 40 Thin QFN (6mm x 6mm)

Pin Configuration

TOP VIEW

REFP 1

REFN 2

COM 3

GND 4

INP 5

INN 6

GND 7

DCE 8

CLKN 9

CLKP 10

MAX1211

EXPOSED PADDLE (GND)

30 D0

29 D1

28 D2

27 D3

26 D4

25 D5

24 D6

23 D7

22 D8

21 D9

THIN QFN

6mm × 6mm × 0.8mm

________________________________________________________________ Maxim Integrated Products 1

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.

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