Features: • 12-bit voltage output DAC
• Single supply from 2.7V to 5.5V
• DNL ±0.5 LSBs, INL ±2.0 LSBs
• Very low power consumption (3V supply):
- 4.2mW, slow mode
- 8.1mW, fast mode
• TMS320, (Q)SPI, and Microwire compatible serial interface
• Programmable settling time of 3.5s or 1s typical
• High impedance reference input buffer
• 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
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 |
WM2636CD
WM2636ID |
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 WM2636 is a 12-bit voltage output, resistor string digital-toanalogue converter that can be powered down under software control. Power down reduces current consumption to 10nA.
An internal precision voltage reference of WM2636 is provided which can source up to 1mA. This can therefore be used as an external system reference.
The WM2636 has been designed to interface efficiently to industry standard microprocessors and DSPs, including the TMS320 family. The WM2636 is programmed with a 16-bit serial word comprising 4 control bits and 12 data bits.
Excellent performance is delivered with a typical DNL of 0.5 LSBs. The settling time of the WM2636 is programmable to allow the designer to optimize speed versus power dissipation. The output stage is buffered by a x2 gain near rail-to-rail amplifier.
The WM2636 is available in an 8-pin SOIC package. Commercial temperature (0° to 70°C) and Industrial temperature (-40° to 85°C) variants are supported.
WM2636 Data Sheet
