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WM2616ID

Description
12-bit Serial Input Voltage Output DAC
File Size111KB,9 Pages
ManufacturerWolfson Microelectronics plc (Cirrus Logic)
Websitehttp://www.wolfson.co.uk
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WM2616ID Overview

12-bit Serial Input Voltage Output DAC

WM2616
12-bit Serial Input Voltage Output DAC
Production Data June 1999, Rev1.0
FEATURES
12-bit voltage output DAC
Single supply from 2.7V to 5.5V
DNL
±
0.5 LSB, INL
±
1.9 LSB
Very low power consumption (3V supply):
- 900µ W, slow mode
µ
- 2.1mW, fast mode
TMS320, (Q)SPI™ , and Microwire™ compatible serial
interface
Programmable settling time of 4µ s or 12µ s typical
µ
µ
High impedance reference input buffer
DESCRIPTION
The WM2616 is a 12-bit voltage output, resistor string digital-to-
analogue converter that can be powered down under software
control. Power down reduces current consumption to 10nA.
The device has been designed to interface efficiently to industry
standard microprocessors and DSPs, including the TMS320
family. The WM2616 is programmed with a 16-bit serial word
comprising 4 control bits and 12 data bits.
Excellent performance is delivered with a typical DNL of 0.5LSBs.
The settling time of the DAC is programmable to allow the designer
to optimize speed versus power dissipation. The output stage is
buffered by a x2 gain rail-to-rail amplifier, which features a Class
AB output stage.
The device is available in an 8-pin SOIC package. Commercial
temperature (0° to 70°C) and Industrial temperature (-40° to 85°C)
variants are supported.
APPLICATIONS
Battery powered test instruments
Digital offset and gain adjustment
Battery operated/remote industrial controls
Machine and motion control devices
Wireless telephone and communication systems
Speech synthesis
Arbitrary waveform generation
ORDERING INFORMATION
DEVICE
WM2616CD
WM2616ID
TEMP. RANGE
0° to 70°C
-40° to 85°C
PACKAGE
8-pin SOIC
8-pin SOIC
BLOCK DIAGRAM
VDD
(8)
TYPICAL PERFORMANCE
REFERENCE
INPUT BUFFER
REFIN(6)
X1
DAC
OUTPUT
BUFFER
X2
(7) OUT
1
AVDD = DVDD = 5V, V
REF
= 2.048V, Speed = Fast mode, Load = 10k/100pF
0.8
0.6
DIN (1)
data
16-BIT
SHIFT
REGISTER
AND
CONTROL
LOGIC
12-BIT
DAC
LATCH
0.4
SCLK (2)
NCS (3)
FS (4)
0.2
DNL - LSB
0
-0.2
-0.4
-0.6
POWER-ON
RESET
2-BIT
CONTROL
LATCH
POWERDOWN/
SPEED
CONTROL
-0.8
WM2616
-1
0
512
1024
1536
2048
DIGITAL CODE
2559
3071
3583
4095
(5)
AGND
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
http://www.wolfson.co.uk
Production Data
Datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and conditions.
2616 master.doc June 17, 1999 14:13
©1999
Wolfson Microelectronics Ltd
.

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