WM2619 Datasheet, PDF (1/9 Pages) Wolfson Microelectronics plc – 12-bit Parallel Input Voltage Output DAC

WM2619
12-bit Parallel Input Voltage Output DAC
Production Data, June 1999, Rev 1.0
FEATURES
• 12-bit voltage output DAC
• Single supply 2.7V to 5.5V operation
• DNL ±0.4 LSB, INL ±1.5 LSB
• Settling time 1µs typical
• Low power consumption
- 8mW typical in slow mode - 5V supply
- 4.3mW typical in fast mode - 3V supply
• Power down mode
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
DESCRIPTION
The WM2619 is a 12-bit voltage output, resistor string, digital-to-
analogue converter. A hardware controlled power down mode is
provided that reduces power consumption to 50nW. In normal
operation the device dissipates 8mW at 5V or 4.3mW at 3V.
The device has been designed to interface efficiently to industry
standard microprocessors and DSPs.
Excellent performance is delivered with a typical DNL of 0.4 LSBs
and a settling time of 1µs. The output stage is buffered by a x2
gain near rail-to-rail amplifier, which features a Class A output
stage. The 12 data bits are double-buffered enabling the output to
be asynchronously updated under hardware control.
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.
ORDERING INFORMATION
DEVICE
WM2619CDT
WM2619IDT
TEMP. RANGE
0° to 70°C
-40° to 85°C
PACKAGE
20-pin TSSOP
20-pin TSSOP
BLOCK DIAGRAM
REFIN(12)
D[0-11]
(19,20, 1-10)
NWE (17)
NCS (18)
12-BIT
INPUT
REGISTER
data
REFERENCE
INPUT BUFFER
X1
12-BIT
DAC
LATCH
VDD
(11)
DAC
OUTPUT
BUFFER
X2
(13) OUT
POWER-ON
RESET
(14)
GND
(16)
NLDAC
POWERDOWN
CONTROL
(15)
NPD
WM2619
TYPICAL PERFORMANCE
1
VDD = 5V, VREF = 2.048V, Load = 10k/100pF
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0
512
1024
1536
2048
2559
DIGITAL CODE
3071
3583
4095
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.
Masterrev1.0a.doc June 17, 1999 10:52
©1999 Wolfson Microelectronics Ltd.