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WM2152CDT

Description
12-bit, 30MSOS ADC
File Size110KB,7 Pages
ManufacturerWolfson Microelectronics plc (Cirrus Logic)
Websitehttp://www.wolfson.co.uk
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WM2152CDT Overview

12-bit, 30MSOS ADC

WM2152
12-bit, 30MSPS ADC
Product Preview, March 2001, Rev 1.1
DESCRIPTION
The WM2152 is a high speed 12-bit analogue-to-digital
converter operating on a 3.3V supply. This device includes
a high bandwidth sample and hold and internal voltage
references. Conversion is controlled by a single clock input.
The device has a differential sample and hold input which
gives excellent common-mode noise immunity and low
distortion. The maximum differential input voltage can be
set by the user, via two mode selection pins, to be 1V or 2V.
A third PGA mode is designed particularly for single-ended
input signals such as composite video sources. Single-
ended input signals require one side of the differential input
to be tied to an external voltage source.
The device provides internal reference voltages for setting
the ADC full-scale range without the requirement for
external circuitry. The WM2152 can also accept external
reference levels for applications where common or high
precision references are required.
The WM2152 provides an out of range indicator flag to
indicate when the input signal exceeds the converter’s full
scale range. An output enable pin allows several devices to
share a common bus. Power down mode for the device is
under the control of the two mode control pins and takes
power consumption down to less than 36µW.
FEATURES
12-bit resolution ADC
30MSPS conversion rate
Programmable Gain Amplifier (PGA)
Out of range indicator
Low power - 160mW typical at 3.3V supplies
Powerdown mode to 30µW typical
66dB SNR for 3.58MHz input signal
-78db THD for 3.58MHz input signal
28-pin TSSOP package
APPLICATIONS
Direct IF sampling
Baseband digitisation
Video Digitisation
Portable instrumentation
Digital imaging
High speed data acquisition
BLOCK DIAGRAM
AVDD
(8, 27)
AVDD
(1,7)
CON0 (3)
CON1 (2)
CONFIGURATION
CONTROL CIRCUIT
TIMING
CONTROL
(28) CLK
VINP (5)
VINM (6)
+
PGA
-
ADC
OUTPUT
BUFFERS
D[11:0]
(12-18, 21-25)
(11) OVRNG
(26) OEB
EXTREF (4)
PRECISION
REFERENCE
CIRCUITS
(20) DVDD
WM2152
(9)
VRT
(10)
VRB
(19) 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
Product Preview
data sheets contain
specifications for products in the formative
phase of development. These products may
be changed or discontinued without notice.
2001
Wolfson Microelectronics Ltd
.

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Description 12-bit, 30MSOS ADC 12-bit, 30MSOS ADC 12-bit, 30MSOS ADC
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