WM5615
Production Data
January 1997 Rev 2
10-Bit Digital-to-Analogue Converter
Description
The WM5615 is a 10-bit voltage output digital-to-
analogue converter (DAC) with a buffered reference input
(high impedance). The DAC produces a maximum output
voltage that is twice the reference voltage and the DAC is
monotonic. The device is simple to use, running from a
single supply of 5V. A power-on reset function is
incorporated to ensure repeatable start-up conditions.
Digital control of the WM5615 is over a 3-wire serial bus
that is CMOS compatible and easily interfaced to industry
standard microprocessor and microcontroller devices. The
device receives a 16-bit data word to produce the
analogue output. The digital inputs feature Schmitt
triggers for high noise immunity. Digital communication
protocols include the SPI
TM
, QSPI
TM
and Microwire
TM
stand-
ards.
The 8-terminal small-outline D package allows digital
control of analogue functions in space-critical applications.
The WM5615C is characterised for operation from 0
o
C to
70
o
C. The WM5615I is for operation from -40
o
C to 85
o
C.
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of
National Semiconductor Corp.
Features
•
•
•
•
•
•
•
•
•
•
•
10-bit CMOS voltage output DAC in an
8-terminal package
5V single supply operation
3-wire serial interface
High-impedance reference input
Maximum voltage output twice reference
input voltage
Internal power-on reset
Low power consumption ... 1.75mW max
877kHz update rate
Setting time to 0.5 LSB ... 12.5µs typical
µ
Monotonic over temperature
Pin compatible with the Maxim MAX515
Applications
•
•
•
•
•
Battery-powered test Instruments
Digital offset and gain adjustment
Battery-operated/remote industrial controls
Machine and motion control devices
Cellular telephones
Block Diagram
+
-
REFIN
5
VOUT
R
R
VDD
+
AGND
POWER-ON
RESET
RESISTOR
STRING
DAC
-
10-BIT DAC REGISTER
CS
SCLK
2
Xs
DIN
CONTROL
LOGIC
(LSB)
(MSB)
4
DUMMY
BITS
DOUT
16-BIT SHIFT REGISTER
Production Data
data sheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson Mi-
croelectronics standard terms and conditions.
Wolfson Microelectronics
Lutton Court, Bernard Terrace, Edinburgh EH8 9NX. UK
© 1996 Wolfson Microelectronics
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
email: admin@wolfson.co.uk
www: http://www.wolfson.co.uk
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
