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WM2148IFT/V Datasheet

  • WM2148IFT/V

  • 14-bit 8MSPS Analogue-To-Digital Converter

  • 14頁(yè)

  • WOLFSON

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WM2148
14-bit 8MSPS Analogue-To-Digital Converter
Production Data, February 2001, Rev 1.1
DESCRIPTION
The WM2148 is a 14-bit, 8 MSPS analogue to digital
converter with an on-chip voltage reference, high bandwidth
sample and hold amplifier and programmable gain. The
analogue input is differential, giving excellent common-
mode noise immunity and low distortion.
The WM2148 is designed for use in highly integrated, low-
power 3.3V systems. A high speed, microprocessor
compatible parallel interface allows control of the ADC input
gain, digital DC offset, internal / external reference and
output data format. Both binary and two鈥檚 complement
formats are supported. The device also features an out of
range indicator pin to show when the input signal exceeds
the converter鈥檚 full-scale range.
In Power Down mode, all analogue circuitry is internally
disconnected from the power supply, reducing total supply
current to 20碌A(chǔ).
The WM2148 is available in a 1mm thin 48-pin TQFP
package in standard commercial and industrial temperature
ranges.
FEATURES
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14-bit resolution ADC
8 MSPS conversion rate
Differential input
3.3V single supply
Very low current power down mode - 20碌A(chǔ) typical
Microprocessor compatible parallel interface
Internal or external voltage reference
High bandwidth sample and hold amplifier
-
140MHz full-power bandwidth
Programmable Gain Amplifier (PGA)
Programmable DC offset
Binary or two鈥檚 complement output format
Out of range indicator
48-pin TQFP package, body thickness 1mm
APPLICATIONS
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Communications
xDSL Front ends
Industrial control
Instrumentation
BLOCK DIAGRAM
VBG
PRECISION
REFERENCE
REF+
REF-
IN+
IN-
+
PGA
-
D[13:0]
ADC
OUTPUT
BUFFERS
OVI
PARALLEL INTERFACE AND
CONTROL LOGIC
WM2148
A[1:0]
CSB
WEB
OEB
CLK
WOLFSON MICROELECTRONICS LTD
Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
http://www.wolfson.co.uk
Production Data
datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics鈥?Terms and Conditions.
餂?001
Wolfson Microelectronics Ltd
.

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