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WM2619IDT Datasheet

  • WM2619IDT

  • 12-bit Parallel Input Voltage Output DAC

  • 9頁(yè)

  • WOLFSON

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WM2619
12-bit Parallel Input Voltage Output DAC
Production Data, June 1999, Rev 1.0
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
12-bit voltage output DAC
Single supply 2.7V to 5.5V operation
DNL 鹵0.4 LSB, INL 鹵1.5 LSB
Settling time 1碌s typical
Low power consumption
-
8mW typical in slow mode - 5V supply
-
4.3mW typical in fast mode - 3V supply
Power down mode
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 1碌s. 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擄 to 70擄C) and Industrial temperature (-40擄 to 85擄C)
variants are supported.
鈥?/div>
APPLICATIONS
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鈥?/div>
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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
DEVICE
WM2619CDT
WM2619IDT
TEMP. RANGE
0擄 to 70擄C
-40擄 to 85擄C
PACKAGE
20-pin TSSOP
20-pin TSSOP
BLOCK DIAGRAM
VDD
(11)
TYPICAL PERFORMANCE
1
VDD = 5V, V
REF
= 2.048V, Load = 10k/100pF
0.8
X1
DAC
OUTPUT
BUFFER
X2
(13) OUT
REFERENCE
INPUT BUFFER
REFIN(12)
0.6
0.4
0.2
0
-0.2
-0.4
D[0-11]
(19,20, 1-10)
NWE (17)
NCS (18)
12-BIT
INPUT
REGISTER
data
12-BIT
DAC
LATCH
POWER-ON
RESET
POWERDOWN
CONTROL
DNL - LSB
-0.6
WM2619
-0.8
-1
0
512
1024
1536
2048
DIGITAL CODE
2559
3071
3583
4095
(14)
GND
(16)
NLDAC
(15)
NPD
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
http://www.wolfson.co.uk
Production Data
Datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics鈥?Terms and conditions.
Masterrev1.0a.doc June 17, 1999 10:52
漏1999
Wolfson Microelectronics Ltd
.

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