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 1ms typical
· 12-bit microprocessor compatible interface
· Power down mode 10nA
Application· 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
Pinout
Specifications
| CONDITION |
MIN |
MAX |
| Supply voltage, VDD to AGND |
|
7V |
| Digital input voltage |
-0.3V |
VDD + 0.3V |
| Reference input voltage |
-0.3V |
VDD + 0.3V |
| Operating temperature range, TA |
WM2639CDT
WM2639IDT |
0°C
-40°C |
70°C
85°C |
| Storage temperature |
-65°C |
150°C |
| Lead temperature 1.6mm (1/16 inch) soldering for 10 seconds |
|
260°C |
DescriptionThe 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 of WM2639 is delivered with a typical DNL of 0.3 LSBs and typical INL of 1.2 LSBs. The output stage of WM2639 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 WM2639 is available in a 20-pin TSSOP package. Commercial temperature (0° to 70°C) and Industrial temperature (-40° to 85°C) variants are supported.
WM2639 Data Sheet
