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WM2608 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc

Part No. WM2608
Description  Octal 10-bit, Serial Input, Voltage Output DAC with Power Down
Download  13 Pages
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Maker  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
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WM2608 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc

 
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WM2608
Octal 10-bit, Serial Input, Voltage Output DAC
with Power Down
Production Data, April 2001, Rev 1.0
WOLFSON MICROELECTRONICS LTD
Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
www.wolfsonmicro.com
Production Data datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and Conditions.
2001 Wolfson Microelectronics Ltd
.
FEATURES
• Eight 10-bit DACs in one package
• Dual supply 2.7V to 5.5V operation
• DNL ±0.1 LSBs, INL ±0.5 LSBs typical
• Programmable settling time / power
(1.0
µs typical in fast mode)
• Microcontroller compatible serial interface
• Power down mode ( < 0.1µA)
• Monotonic over temperature
• Data output for daisy chaining
APPLICATIONS
• Battery powered test instruments
• Digital offset and gain adjustment
• Battery operated / remote industrial controls
• Programmable loop controllers
• CNC machine tools
• Machine and motion control devices
• Wireless telephone and communication systems
• Robotics
ORDERING INFORMATION
DEVICE
TEMP. RANGE
PACKAGE
WM2608CDT
0
° to 70°C
20-pin TSSOP
WM2608IDT
-40
° to 85°C
20-pin TSSOP
DESCRIPTION
The WM2608 is an octal, 10-bit, resistor string digital-to-
analogue converter. The eight individual DACs contained in the
IC can be switched in pairs between fast and slow (low power)
operation modes, or powered down, under software control.
Alternatively, the whole device can be powered down, reducing
current consumption to less than 0.1
µA.
The DAC outputs are buffered by a rail-to-rail amplifier with a
gain of two, which is configurable as Class A (fast mode) or
Class AB (for low-power mode).
The WM2608 has been designed to interface directly to industry
standard microprocessors and DSPs, and can operate on two
separate analogue and digital power supplies. It is programmed
with a 16-bit serial word comprising 4 address bits and up to 12
DAC or control register data bits. All eight DACs can be
simultaneously forced to a preset value using a preset input pin.
A daisy-chain data output makes it possible to control several of
Wolfson’s octal DACs from the same interface, without
increasing the number of control lines.
The
device
is
available
in
a
20-pin
TSSOP
package.
Commercial
temperature
(0°
to
70°C)
and
Industrial
temperature (-40° to 85°C) variants are supported.
BLOCK DIAGRAM
TYPICAL PERFORMANCE
LATCH
POWER/SPEED
CONTROL
RESISTOR
STRING
(12) OUT A
DAC A
DIN (2)
SCLK (3)
FS (4)
PREB (5)
DOUT (19)
DACs B, C, D, E, F, G, H
as DAC A
(6-9, 13-15)
OUT B to H
VREF/2
SERIAL
INTERFACE
AND
CONTROL
LOGIC
MODE (17)
AVDD
(11)
DVDD
(20)
AGND
(10)
DGND
(1)
LOADB
(18)
REF
(16)
-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0
128
256
384
512
640
768
896
1024
DIGITAL CODE


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