WM2331IDT/V Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

Número de pieza

componentes Descripción

Fabricante

WM2331IDT/V

10-bit 30MSPS ADC with PGA and Clamp

Wolfson Microelectronics plc 

WM2331

10-bit 30MSPS ADC with PGA and Clamp

Production Data, April 2001, Rev 1.4

DESCRIPTION

The WM2331 is a high speed, 10-bit pipeline analogue-to-

digital converter (ADC) with on-chip programmable gain

amplifier (PGA) and clamp circuit, and internal voltage

references. Conversion is controlled by a single clock input.

The device has a high bandwidth differential sample and

hold input, which gives excellent common-mode noise

immunity and low distortion. Alternatively, it can be driven

in single ended fashion with an optional voltage clamp for

DC restoration that can take its reference from an on-chip

10-bit DAC or an external source.

The WM2331 provides internal reference voltages for

setting the ADC full-scale range without the requirement for

external circuitry. However, it can also accept external

references for applications where common or high-precision

references are required.

A bidirectional 10-bit parallel interface is used both to

control the device and to read ADC conversion data. ADC

data can be output in unsigned binary or two’s complement

format. An out-of-range output pin indicates when the input

signal is outside the converter’s range.

The WM2331 operates with independent analogue and

digital supplies of 3V to 5.5V and is supplied in a 28-pin

TSSOP package.

FEATURES

• 10-bit resolution ADC

• 30MSPS conversion rate

• Programmable Gain Amplifier (PGA)

• Built in clamp function (DC restore) with 10-bit DAC

• Adjustable internal voltage references

• Wide Input Bandwidth - 150MHz

• Unsigned Binary or Two’s complement output format

• Programmable via parallel interface

• Independent analogue and digital supplies, 3V to 5.5V

• Low power - 92mW typical at 3.0V supplies

• Powerdown mode to 3mW typical

• 28-pin TSSOP package

APPLICATIONS

• Composite Video Digitisation

• Digital Copiers

• Digital Video Cameras

• Set Top Box (STB)

• IF and Baseband Digitisation

• Medical Imaging

• High Speed Data Acquisition

BLOCK DIAGRAM

CLAMP

CLAMPIN

CLAMP

AMPLIFIER

M

U

X

CLAMP

LEVEL

DAC

CONTROL

REGISTERS

WR

AIN

REFTS

REFBS

REFSENSE

VREF

MODE

S/H

PGA

ADC

Core

INPUT/

OUTPUT

BUFFERS

ON-CHIP

REFERENCE

GENERATOR

TIMING

CONTROL

AVDD AGND

REFBF REFTF

WM2331

DIO[9:0]

OVR

OEB

CLK

DVDD

DGND

WOLFSON MICROELECTRONICS LTD

Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK

Tel: +44 (0) 131 667 9386

Fax: +44 (0) 131 667 5176

Email: sales@wolfson.co.uk

www.wolfsonmicro.com

Production Data datasheets contain final

specifications current on publication date.

Supply of products conforms to Wolfson

Microelectronics’ Terms and Conditions.

 2001 Wolfson Microelectronics Ltd.

Share Link: