WM5628L, WM5628
Production Data
Sept. 1996 Rev 2
3 & 5V Octal 8-Bit Voltage Output DAC
with Serial Interface
Description
Features
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Eight 8-bit voltage output DAC's
Three wire serial interface
WM5628L and WM5628 are Octal 8-bit digital to analogue
converters (DAC) controlled via a serial interface. Each
DAC's output voltage range is programmable for either x1
or x 2 its reference input voltage, allowing near rail to rail
operation for the x 2 output range. High impedance
buffered voltage reference inputs are provided for each
group of four DACs. WM5628L operates on a single
supply voltage of 3 V while WM5628 operates on 5 V.
WM5628/L interfaces to all popular microcontrollers and
microprocessors via a three wire serial interface with CMOS
compatible, schmitt trigger, digital inputs. An 12 bit
command word comprises 3 DAC select bits, an output
range selection bit and 8-bits of data.
Individual or all DAC outputs are changed using
WM5628/L's double buffered DAC registers and the
separate LOAD and LDAC inputs. DAC outputs are
updated simultaneously by writing a complete set of new
values and then pulsing the LDAC input.
The DAC outputs are optimised for single supply
operation and driving ground referenced loads.
An internal power-on-reset function sets the DAC's input
codes to zero at power up.
Programmable x1 or x 2 output range.
Power-on-reset sets outputs to zero
Buffered voltage reference inputs
Simultaneous DAC output update
Key Specifications
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Single supply operation:
WM5628L : 3 V
WM5628
: 5 V
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0 to 4 V output (x 2 output range) at 5 V VDD
0 to 2.5 V output (x 2 output range) at 3 V VDD
Guaranteed monotonic output
Applications
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Programmable d.c. voltage sources
Digitally controlled attenuator/amplifier
Signal synthesis
Mobile communications
Automatic test equipment
Process control
Ideal in space critical applications WM5628/L is available
in wide-bodied and DIP packages for commercial (0oC to
70oC) and industrial (-40oC to 85oC) temperature ranges.
Pin Configuration
Ordering Information
Top View
DEVICE
TEMP. RANGE
PACKAGE
16 pin N and DW packages
WM5628CN
WM5628CDW
WM5628IN
0oC to 70oC
0oC to 70oC
-40oC to 85oC 16 pin plastic DIP
-40oC to 85oC 16 pin wide-bodied plastic SO
0oC to 70oC
0oC to 70oC
16 pin plastic DIP
16 pin wide-bodied plastic SO
DACB
DACA
GND
Da ta
1
2
3
4
5
6
7
8
16 DACC
15 DACD
14 Re f1
WM5628IDW
WM5628LCN
WM5628LCDW
WM5628LIN
WM5628LIDW
13 LDAC
12 Lo a d
11 Re f2
16 pin plastic DIP
CLK
16 pin wide-bodied plastic SO
VDD
-40oC to 85oC 16 pin plastic DIP
-40oC to 85oC 16 pin wide-bodied plastic SO
DACE
DACF
10 DACH
9
DAC G
Production Data data sheets contain
final specifications current on publication
date. Supply of products conforms to
Wolfson Microelectronics standard terms
and conditions
© 1996 Wolfson Microelectronics
Wolfson Microelectronics
Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK
Tel: +44 (0) 131 667 9386
email: admin@wolfson.co.uk
www: http://www.wolfson.co.uk
Fax: +44 (0) 131 667 5176