WM5615
Production Data
January 1997 Rev 2
10-Bit Digital-to-Analogue Converter
Description
Features
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 SPITM, QSPITM and MicrowireTM stand-
ards.
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10-bit CMOS voltage output DAC in an
8-terminal package
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5V single supply operation
3-wire serial interface
High-impedance reference input
Maximum voltage output twice reference
input voltage
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Internal power-on reset
Low power consumption ... 1.75mW max
877kHz update rate
Setting time to 0.5 LSB ... 12.5µs typical
Monotonic over temperature
Pin compatible with the Maxim MAX515
The 8-terminal small-outline D package allows digital
control of analogue functions in space-critical applications.
The WM5615C is characterised for operation from 0oC to
70oC. The WM5615I is for operation from -40oC to 85oC.
Applications
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Battery-powered test Instruments
Digital offset and gain adjustment
Battery-operated/remote industrial controls
Machine and motion control devices
Cellular telephones
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of
National Semiconductor Corp.
Block Diagram
5
+
-
REFIN
VOUT
RESISTOR
STRING
DAC
+
R
R
-
AGND
POWER-ON
RESET
VDD
10-BIT DAC REGISTER
CS
CONTROL
LOGIC
SCLK
(LSB)
(MSB)
4
2
Xs
DUMMY
BITS
DOUT
DIN
16-BIT SHIFT REGISTER
Production Data data sheets contain final
© 1996 Wolfson Microelectronics
Wolfson Microelectronics
specifications current on publication date.
Supply of products conforms to Wolfson Mi-
croelectronics standard terms and conditions.
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