Features: • Dual 8-bit voltage output DAC
• Single supply from 2.7V to 5.5V
• Low power consumption:
- 1.7mW typical (3V supply, slow mode)
- 3.7mW typical (3V supply, fast mode)
• DNL ±0.1 LSB, INL ±0.4 LSB (typical)
• Monotonic over temperature
• Microprocessor and DSP compatible serial interface
• Programmable settling time of 0.8s or 2.8s typical
• High impedance reference input buffer
Application• Digital servo control loops
• Industrial process control
• Battery powered instruments and controls
• Machine and motion control devices
• Digital offset and gain adjustment
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 |
WM2626CD
WM2626ID |
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 WM2626 is a dual 8-bit voltage output, resistor string digital-to-analogue converter. It can operate with supply voltages between 2.7V and 5.5V and can be powered down under software control. Power down reduces current consumption to 1A.
The WM2626 has been designed for glueless interface to industry standard microprocessors and DSPs. It is programmed with a 16-bit serial word including 4 control bits and 8 data bits.
Excellent performance of the WM2626 is delivered with a typical DNL of 0.2LSBs. Monotonicity is guaranteed over the operating temperature range. The settling time of the DAC is programmable to allow for optimisation of speed versus power dissipation. The analogue output is buffered by a rail-to-rail amplifier with a gain of two and a Class AB output stage.
The on-chip voltage reference of the WM2626 is available to external circuitry through the REF pin. It is buffered and can supply up to 1mA. Alternatively, an external reference can be used. A high impedance reference input buffer eliminates the need to keep the reference source impedance low.
The WM2626 is available in an 8-pin SOIC package. Commercial (0° to 70°C) and Industrial (-40° to 85°C) temperature range variants are available.
WM2626 Data Sheet
