General Description

The MAX1209 is a 3.3V, 12-bit, 80Msps analog-to-digital

converter (ADC) featuring a fully differential wideband

track-and-hold (T/H) input amplifier, driving a low-noise

internal quantizer. The analog input stage accepts sin-

gle-ended or differential signals. The MAX1209 is opti-

mized for low power, small size, and high dynamic

performance. Excellent dynamic performance is main-

tained from baseband to input frequencies of 175MHz

and beyond, making the MAX1209 ideal for intermediate-

frequency (IF) sampling applications.

Powered from a single 3.0V to 3.6V supply, the

MAX1209 consumes only 366mW while delivering a

typical signal-to-noise (SNR) performance of 66.5dB at

an input frequency of 175MHz. In addition to low oper-

ating power, the MAX1209 features a 3µW power-down

mode to conserve power during idle periods.

A flexible reference structure allows the MAX1209 to use

the internal 2.048V bandgap reference or accept an

externally applied reference. The reference structure

allows the full-scale analog input range to be adjusted

from ±0.35V to ±1.15V. The MAX1209 provides a com-

mon-mode reference to simplify design and reduce exter-

nal component count in differential analog input circuits.

The MAX1209 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 (DCE).

ADC conversion results are available through a 12-bit,

parallel, CMOS-compatible output bus. The digital out-

put format is pin selectable to be either two’s comple-

ment or Gray code. A data-valid indicator eliminates

external components that are normally required for reli-

able digital interfacing. A separate digital power input

accepts a wide 1.7V to 3.6V supply, allowing the

MAX1209 to interface with various logic levels.

The MAX1209 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.

See the Pin-Compatible Versions table for a complete

family of 14-bit and 12-bit high-speed ADCs.

Applications

IF Communication Receivers

Cellular, Point-to-Point Microwave, HFC, WLAN

Ultrasound and Medical Imaging

Portable Instrumentation

Low-Power Data Acquisition

Features

♦ Direct IF Sampling Up to 400MHz

♦ Excellent Dynamic Performance

♦ 3.3V Low-Power Operation

366mW (Single-Ended Clock Mode)

393mW (Differential Clock Mode)

3µW (Power-Down Mode)

♦ Differential or Single-Ended Clock

♦ Fully Differential or Single-Ended Analog Input

♦ Adjustable Full-Scale Analog Input Range: ±0.35V

to ±1.15V

♦ Common-Mode Reference

♦ CMOS-Compatible Outputs in Two’s Complement

or Gray Code

♦ Data-Valid Indicator Simplifies Digital Design

♦ Data Out-of-Range Indicator

♦ Miniature, 40-Pin Thin QFN Package with Exposed

Paddle

♦ Evaluation Kit Available (Order MAX1211EVKIT)

12-Bit, 80Msps, 3.3V IF-Sampling ADC

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

19-1001; Rev 0; 8/04

PART

TEMP

RANGE

PIN-PACKAGE

PKG

CODE

MAX1209ETL

-40

°C to

+85

°C

40 Thin QFN

(6mm x 6mm x 0.8mm)

T4066-3

Pin-Compatible Versions

PART

SAMPLING

RATE (Msps)

RESOLUTION

(BITS)

TARGET

APPLICATION

MAX12553

65

14

IF/Baseband

MAX1209

80

12

IF

MAX1211

65

12

IF

MAX1208

80

12

Baseband

MAX1207

65

12

Baseband

MAX1206

40

12

Baseband

Pin Configuration appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.