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WM2639

Wolfson Microelectronics plc
Part Number WM2639
Manufacturer Wolfson Microelectronics plc
Description 12-Bit Parallel Input Voltage Output DAC with Internal Reference
Published Apr 17, 2005
Detailed Description WM2639 12-Bit Parallel Input Voltage Output DAC with Internal Reference Production Data, July 1999, Rev 1.0 FEATURES • ...
Datasheet PDF File WM2639 PDF File

WM2639
WM2639


Overview
WM2639 12-Bit Parallel Input Voltage Output DAC with Internal Reference Production Data, July 1999, Rev 1.
0 FEATURES • • • • • • • 12-bit voltage output DAC Single supply 2.
7V to 5.
5V operation DNL ± 0.
3 LSBs, INL ± 1.
2 LSBs Internal programmable voltage reference Settling time 1µ s typical 12-bit microprocessor compatible interface Power down mode 10nA DESCRIPTION The WM2639 is a 12-bit voltage output, resistor string, digital-toanalogue converter.
A hardware controlled power down mode is provided that reduces current consumption to 10nA.
The device has been designed to interface efficiently to industry standard microprocessors and DSPs.
The WM2639 features an internal programmable voltage reference simplifying overall system design.
The reference voltage can also be supplied externally.
Excellent performance is delivered with a typical DNL of 0.
3 LSBs and typical INL of 1.
2 LSBs.
The output stage is buffered by a x2 gain near rail-to-rail amplifier, which features a Class A output stage (slow mode, Class AB).
The 12 data bits are double buffered enabling the output to be asynchronously updated under hardware control.
The settling time of the DAC is software programmable to allow the designer to optimise speed versus power dissipation.
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.
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 Mass storage devices ORDERING INFORMATION DEVICE WM2639CDT WM2639IDT TEMP.
RANGE 0° to 70°C -40° to 85°C PACKAGE 20-pin TSSOP 20-pin TSSOP BLOCK DIAGRAM VDD (11) REFERENCE OUTPUT BUFFER WITH OUPUT ENABLE REF(12) X1 TYPICAL PERFORMANCE 1 5V = VDD, VREF 1.
024V/2.
048V SELECTABLE REFERENCE 0.
8 2-BIT REFERENCE SELECT...


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