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WM2638

Wolfson Microelectronics plc
Part Number WM2638
Manufacturer Wolfson Microelectronics plc
Description Dual 12-Bit Serial Input Voltage Output DAC with Internal reference
Published Apr 17, 2005
Detailed Description WM2638 Dual 12-Bit Serial Input Voltage Output DAC with Internal reference Production Data, Rev 1.0, July 1999 FEATURES...
Datasheet PDF File WM2638 PDF File

WM2638
WM2638


Overview
WM2638 Dual 12-Bit Serial Input Voltage Output DAC with Internal reference Production Data, Rev 1.
0, July 1999 FEATURES • • • • Two 12-bit voltage output DACs Single 2.
7V to 5.
5V supply operation DNL ± 0.
4 LSBs, INL ± 2 LSBs Low power consumption • 12mW typical in fast mode • 6mW typical in slow mode TMS320, (Q)SPI™ , and Microwire™ compatible serial interface Programmable settling time 1µ s or 3.
5µ s typical Power down mode 10nA DESCRIPTION The WM2638 is a dual 12-bit voltage output, resistor string, digitalto-analogue converter.
A software controlled power down mode is provided that reduces current consumption to 10nA.
The WM2638 features an internal programmable voltage reference simplifying overall system design.
A reference voltage may also be supplied externally.
The device has been designed to interface efficiently to industry standard microprocessors and DSPs, including the TMS320 family.
The WM2638 is programmed with a 16-bit serial word comprising of a latch address, mode control bits and DAC or control data.
Excellent performance is delivered with a typical DNL of 0.
4LSBs.
The programmable settling time allows the designer to optimise speed versus power consumption.
The output stage is buffered by a x2 gain near rail-to-rail amplifier.
The device is available in an 8-pin SOIC package ideal for spacecritical applications.
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 Cellular telephones Wireless telephones and communication systems Speech synthesis Arbitrary waveform generation ORDERING INFORMATION DEVICE WM2638CD WM2638ID TEMP.
RANGE 0° to 70°C -40° to 85°C PACKAGE 8-pin SOIC 8-pin SOIC BLOCK DIAGRAM VDD (8) TYPICAL PERFORMANCE c 1 5V = VDD, V REF = External, Speed = Fast mode, Load = 10k/100pF 0.
8 REFERENCE OUTPU...


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