WM5615 Datasheet, PDF (1/12 Pages) Wolfson Microelectronics plc – 10-Bit Digital-to-Analogue Converter

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^oC to
70^oC. The WM5615I is for operation from -40^oC to 85^oC.
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
• 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
AGND
CS
SCLK
DIN
+
-
+
RESISTOR
STRING
DAC
-
R
POWER-ON
RESET
CONTROL
LOGIC
R
10-BIT DAC REGISTER
(LSB)
2
Xs
(MSB) ₄
DUMMY
BITS
16-BIT SHIFT REGISTER
VOUT
VDD
DOUT
5
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
Tel: [phone] Fax: [phone]
email: [e-mail]
www: http://www.wolfson.co.uk
© 1996 Wolfson Microelectronics