Features: • Four 8-bit voltage output DACs
• Dual 2.7V to 5.5V supply (separate digital and analogue supplies)
• DNL ±0.03 LSB, INL ±0.3 LSB typical
• Low power consumption:
- 3mW, slow mode - 3V supply
- 9mW, fast mode - 3V supply
• DSP and microprocessor compatible serial interface
• Programmable settling time of 2.5s or 8.5s typical
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
• Arbitrary waveform generation
• Robotics
Pinout
Specifications
| CONDITION |
MIN |
MAX |
| Digital supply voltages, AVDD or DVDD to GND |
|
7V |
| Reference input voltage |
-0.3V |
AVDD + 0.3V |
| Digital input voltage range to GND |
-0.3V |
DVDD + 0.3V |
| Operating temperature range, TA |
WM2627C
WM2627I |
0°C
-40°C |
70°C
85°C |
| Storage temperature |
-65°C |
150°C |
Soldering lead temperature, 1.6mm (1/16 inch) from package body for
10 seconds |
|
260°C |
DescriptionThe WM2627 is a quadruple 8-bit voltage output, resistor string, digital-to-analogue converter. Each DAC can be individually powered down under software control. A hardware controlled mode is provided that powers down all DACs. Power down reduces current consumption to 1 A.
The WM2627 has been designed to interface efficiently to industry standard microprocessors and DSPs. It is programmed with a 16-bit serial word comprising of a DAC address, individual DAC control bits and an 8-bit value.
The WM2627 has provision for two supplies: one supply for the serial interface (DVDD, DGND), and one for the DACs, reference buffers and output buffers (AVDD, AGND). This enables a typical application where the device can be controlled via a microprocessor operating on a 3V supply, with the DACs operating on a 5V supply. Alternatively, the supplies can be tied together in a single supply application.
Excellent performance of WM2627 is delivered with a typical DNL of ±0.03 LSB. The settling time of the DAC 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, which features a Class AB output stage. DACs A and B can have a different reference voltage to DACs C and D.
The WM2627 is available in a 16-pin TSSOP package. Commercial temperature (0° to 70°C) and Industrial temperature (-40° to 85°C) variants are supported.
WM2627 Data Sheet
