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WM2331IDT/V Datasheet

  • WM2331IDT/V

  • 10-bit 30MSPS ADC with PGA and Clamp

  • 232.50KB

  • 25頁

  • WOLFSON

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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鈥檚 complement
format. An out-of-range output pin indicates when the input
signal is outside the converter鈥檚 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
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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鈥檚 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
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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
S/H
PGA
ADC
Core
INPUT/
OUTPUT
BUFFERS
DIO[9:0]
REFBS
OVR
OEB
TIMING
CONTROL
REFSENSE
VREF
MODE
ON-CHIP
REFERENCE
GENERATOR
CLK
DVDD
DGND
WM2331
AVDD
AGND
REFBF REFTF
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鈥?Terms and Conditions.
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2001 Wolfson Microelectronics Ltd
.

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