WM2617 Datasheet, PDF (1/10 Pages) Wolfson Microelectronics plc – Dual 10-Bit Serial DAC with Power Down

WM2617
Dual 10-Bit Serial DAC with Power Down
Production Data, Rev 1.1, October 2000
FEATURES
• Two 10-bit DACs
• Single supply from 2.7V to 5.5V supply operation
• DNL ±0.1 LSB, INL ±0.5 LSB
• Low power consumption
• 3mW typical in slow mode
• 8mW typical in fast mode
• TMS320, (Q)SPI, and Microwire compatible serial
interface
• Programmable settling time 4µs or 12µs typical
APPLICATIONS
• Battery powered test instruments
• Digital offset and gain adjustment
• Battery operated/remote industrial controls
• Machine and motion control devices
• Wireless telephone and communication systems
• Speech synthesis
• Arbitrary waveform generation
ORDERING INFORMATION
DESCRIPTION
The WM2617 is a dual 10-bit voltage output, resistor string,
digital-to-analogue converter. A power-on-reset function
ensures repeatable start-up conditions.
The device has been designed to interface efficiently to industry
standard microprocessors and DSPs, including the TMS320
family. The WM2617 is programmed with a 16-bit serial word.
The WM2617 has a simple-to-use single 2.7V to 5.5V supply.
The digital inputs feature Schmitt triggers for high noise
immunity.
The number of clocks from the falling edge of NCS are counted
automatically. The device is then updated and disabled from
accepting further data inputs.
Excellent performance is delivered with a typical DNL of ±0.1
LSBs. The settling time of the DAC is programmable to allow
the designer to optimise speed versus power dissipation.
The device is available in an 8-pin SOIC package ideal for
space-critical applications. Commercial temperature (0° to
70°C) and industrial temperature (-40° to 85°C) variants are
supported.
DEVICE
WM2617CD
WM2617ID
TEMP. RANGE
0° to 70°C
-40° to 85°C
PACKAGE
8-pin SOIC
8-pin SOIC
BLOCK DIAGRAM
REFIN(6)
DIN (1)
SCLK (2)
NCS (3)
16-BIT
SHIFT
REGISTER
AND
CONTROL
LOGIC
data
10-BIT
DAC A
LATCH
10-BIT
DAC B
HOLDING
LATCH
REFERENCE
INPUT BUFFER
X1
REFERENCE
INPUT BUFFER
X1
10-BIT
DAC B
CONTROL
LATCH
POWER-ON
RESET
(5)
AGND
2-BIT
CONTROL
LATCH
POWERDOWN/
SPEED
CONTROL
VDD
(8)
DAC
OUTPUT
BUFFER
X2
(4) OUTA
DAC
OUTPUT
BUFFER
X2
(7) OUTB
WM2617
TYPICAL PERFORMANCE
0.25
0.2
VDD = 5V, VREF = 2.048V, Speed = Fast mode, Load = 10K/100pF
0.15
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.25
0
256
512
767
DIGITAL CODE
1023
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: [phone]
Fax: [phone]
Email: [e-mail]
http://www.wolfson.co.uk
Production Data datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and Conditions.
2000 Wolfson Microelectronics Ltd.