MAX12557

更新时间： 2024-11-23 21:54:11

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
28页	902K
描述
Dual, 65Msps, 14-Bit, IF/Baseband ADC

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MAX12557 数据手册

19-3544; Rev 0; 2/05

Dual, 65Msps, 14-Bit, IF/Baseband ADC

General Description

Features

The MAX12557 is a dual 3.3V, 14-bit analog-to-digital

converter (ADC) featuring fully differential wideband

track-and-hold (T/H) inputs, driving internal quantizers.

The MAX12557 is optimized for low power, small size,

and high dynamic performance in intermediate frequen-

cy (IF) and baseband sampling applications. This dual

ADC operates from a single 3.3V supply, consuming

only 610mW while delivering a typical 72.5dB signal-to-

noise ratio (SNR) performance at a 175MHz input fre-

quency. The T/H input stages accept single-ended or

differential inputs up to 400MHz. In addition to low oper-

ating power, the MAX12557 features a 166µW power-

down mode to conserve power during idle periods.

♦ Direct IF Sampling Up to 400MHz

♦ Excellent Dynamic Performance

74.1dB/72.5dB SNR at f = 70MHz/175MHz

83.4dBc/79.5dBc SFDR at f = 70MHz/175MHz

♦ 3.3V Low-Power Operation

637mW (Differential Clock Mode)

610mW (Single-Ended Clock Mode)

♦ Fully Differential or Single-Ended Analog Input

♦ Adjustable Differential Analog Input Voltage

♦ 750MHz Input Bandwidth

♦ Adjustable, Internal or External, Shared Reference

♦ Differential or Single-Ended Clock

♦ Accepts 25% to 75% Clock Duty Cycle

♦ User-Selectable DIV2 and DIV4 Clock Modes

♦ Power-Down Mode

A flexible reference structure allows the MAX12557 to

use the internal 2.048V bandgap reference or accept

an externally applied reference and allows the refer-

ence to be shared between the two ADCs. The refer-

ence structure allows the full-scale analog input range

to be adjusted from 0.35V to 1.15V. The MAX12557

provides a common-mode reference to simplify design

and reduce external component count in differential

analog input circuits.

♦ CMOS Outputs in Two’s Complement or Gray

Code

♦ Out-of-Range and Data-Valid Indicators

The MAX12557 supports either a single-ended or differ-

ential input clock. User-selectable divide-by-two (DIV2)

and divide-by-four (DIV4) modes allow for design flexibil-

ity and help eliminate the negative effects of clock jitter.

Wide variations in the clock duty cycle are compensated

with the ADC’s internal duty-cycle equalizer (DCE).

♦ Small, 68-Pin Thin QFN Package

♦ 12-Bit Compatible Version Available (MAX12527)

♦ Evaluation Kit Available (Order MAX12557 EV Kit)

The MAX12557 features two parallel, 14-bit-wide,

CMOS-compatible outputs. The digital output format is

pin-selectable to be either two’s complement or Gray

code. A separate power-supply input for the digital out-

puts accepts a 1.7V to 3.6V voltage for flexible interfac-

ing with various logic levels. The MAX12557 is available

in a 10mm x 10mm x 0.8mm, 68-pin thin QFN package

with exposed paddle (EP), and is specified for the

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

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

68 Thin QFN-EP*

(10mm x 10mm x 0.8mm)

MAX12557ETK -40°C to +85°C

*EP = Exposed paddle.

For a 12-bit, pin-compatible version of this ADC, refer to

the MAX12527 data sheet.

Selector Guide

SAMPLING RATE

RESOLUTION

(Bits)

PART

Applications

(Msps)

IF and Baseband Communication Receivers

Cellular, LMDS, Point-to-Point Microwave,

MMDS, HFC, WLAN

MAX12557

MAX12527

I/Q Receivers

Ultrasound and Medical Imaging

Portable Instrumentation

Digital Set-Top Boxes

Pin Configuration appears at end of data sheet.

Low-Power Data Acquisition

________________________________________________________________ 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.

12 3 4 5 6 7...28

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与MAX12557相关器件

型号	品牌	获取价格	描述	数据表
MAX12557ETK	MAXIM	获取价格	Dual, 65Msps, 14-Bit, IF/Baseband ADC
MAX12557ETK+	MAXIM	获取价格	ADC, Successive Approximation, 14-Bit, 1 Func, 2 Channel, Parallel, Word Access, 10 X 10 M
MAX12557ETK+TD	MAXIM	获取价格	ADC, Successive Approximation, 14-Bit, 2 Func, 1 Channel, Parallel, Word Access, CMOS, 10
MAX12557ETK-TD	MAXIM	获取价格	ADC, Successive Approximation, 14-Bit, 2 Func, 1 Channel, Parallel, Word Access, CMOS, 10
MAX12557EVKIT	MAXIM	获取价格	Low-Voltage and Low-Power Operation
MAX12558	MAXIM	获取价格	Dual, 96Msps, 14-Bit, IF/Baseband ADC
MAX12558ETK	MAXIM	获取价格	ADC, Proprietary Method, 14-Bit, 2 Func, 1 Channel, Parallel, Word Access, CMOS, 10 X 10 M
MAX12558ETK+	MAXIM	获取价格	ADC, Proprietary Method, 14-Bit, 2 Func, 1 Channel, Parallel, Word Access, CMOS, 10 X 10 M
MAX12558ETK+D	MAXIM	获取价格	暂无描述
MAX12558ETK+T	MAXIM	获取价格	A/D Converter, 14-Bit, 2 Func, CMOS, PQCC68

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