Features: · Quad 12-bit DAC voltage output DAC
· Dual 2.7V to 5.5V supply (separate digital and analoguesupplies)
· DNL ±0.4 LSB, INL ±1.5 LSB
· Low power consumption:- 5.5mW, slow mode - 5V supply- 3.3mW, slow mode - 3V supply
· TMS320, (Q)SPIä, and Microwireä compatible serialinterface
· Programmable settling time of 4ms or 12ms typicalApplication· 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 generationPinout
Specifications
| CONDITION |
MIN |
MAX |
| Supply voltages, DVDD to DGND, AVDD to AGND |
|
7V |
| Supply voltage differences, AVDD to DVDD |
-2.8V |
2.8V |
| Digital input voltage |
-0.3V |
DVDD + 0.3V |
| Reference input voltage |
-0.3V |
AVDD + 0.3V |
| Operating temperature range, TA |
WM2614CDT
WM2614IDT |
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 WM2614 is a quadruple 12-bit voltage output, resistor string,digital-to-analogue converter. Each DAC can be individuallypowered down under software control. A hardware controlled modeis provided that powers down all DACs. Power down reducescurrent consumption to 10nA.
The device has been designed to interface efficiently to industrystandard microprocessors and DSPs, including the TMS320family. The WM2614 is programmed with a 16-bit serial wordcomprising of a DAC address, individual DAC control bits and a12-bit value.
The WM2614 has provision for two supplies: one supply for theserial interface (DVDD, DGND) and one for the DACs, referencebuffers and output buffers (AVDD, AGND). This enables a typicalapplication where the device can be controlled via amicroprocessor operating on a 3V supply, with the DACs operatingon a 5V supply. Alternatively, the supplies can be tied together in asingle supply application.
Excellent performance is delivered with a typical DNL of 0.4 LSBs.The settling time of the DAC is programmable to allow the designerto optimize speed versus power dissipation. The output stage isbuffered by a x2 gain near rail-to-rail amplifier, which features aClass AB output stage. DACs A and B can have a differentreference voltage to DACs C and D.
The WM2614 is available in a 16-pin TSSOP package.Commercial temperature (0° to 70°C) and Industrialtemperature (-40° to 85°C) variants are supported.
WM2614 Data Sheet
