WM5628L Datasheet, PDF (1/15 Pages) Wolfson Microelectronics plc – 3 & 5V Octal 8-Bit Voltage Output DAC with Serial Interface

WM5628L, WM5628
Production Data
Sept. 1996 Rev 2
3 & 5V Octal 8-Bit Voltage Output DAC
with Serial Interface
Description
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.
Ideal in space critical applications WM5628/L is available
in wide-bodied and DIP packages for commercial (0^oC to
70^oC) and industrial (-40^oC to 85^oC) temperature ranges.
Pin Configuration
Features
• Eight 8-bit voltage output DAC's
• Three wire serial interface
• Programmable x1 or x 2 output range.
• Power-on-reset sets outputs to zero
• Buffered voltage reference inputs
• Simultaneous DAC output update
Key Specifications
• Single supply operation:
WM5628L : 3 V
WM5628 : 5 V
• 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
• Programmable d.c. voltage sources
• Digitally controlled attenuator/amplifier
• Signal synthesis
• Mobile communications
• Automatic test equipment
• Process control
Ordering Information
Top View
16 pin N and DW packages
DACB 1
DACA 2
GND 3
Data 4
CLK 5
VDD 6
DACE 7
DACF 8
16 DACC
15 DACD
14 Ref1
13 LDAC
12 Load
11 Ref2
10 DACH
9 DAC G
DEVICE
TEMP. RANGE
WM5628CN
0^oC to 70^oC
WM5628CDW
WM5628IN
WM5628IDW
WM5628LCN
WM5628LCDW
WM5628LIN
WM5628LIDW
0^oC to 70^oC
-40^oC to 85^oC
-40^oC to 85^oC
0^oC to 70^oC
0^oC to 70^oC
-40^oC to 85^oC
-40^oC to 85^oC
PACKAGE
16 pin plastic DIP
16 pin wide-bodied plastic SO
16 pin plastic DIP
16 pin wide-bodied plastic SO
16 pin plastic DIP
16 pin wide-bodied plastic SO
16 pin plastic DIP
16 pin wide-bodied plastic SO
Production Data data sheets contain
final specifications current on publication
date. Supply of products conforms to
Wolfson Microelectronics standard terms
and conditions
Wolfson Microelectronics ^{© 1996 Wolfson Microelectronics}
Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK
Tel: [phone] Fax: [phone]
email: [e-mail]
www: http://www.wolfson.co.uk