Features: • Eight 10-bit DACs in one package
• Dual supply 2.7V to 5.5V operation
• DNL ±0.1 LSBs, INL ±0.5 LSBs typical
• Programmable settling time / power (1.0s typical in fast mode)
• Internal programmable voltage reference
• Microcontroller compatible serial interface
• Power down mode ( < 0.1A)
• Monotonic over temperature
• Data output for daisy chaining
Application• Battery powered test instruments
• Digital offset and gain adjustment
• Battery operated / remote industrial controls
• Programmable loop controllers
• CNC machine tools
• Machine and motion control devices
• Wireless telephone and communication systems
• 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 |
WM2631CDT
WM2631IDT |
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 WM2631 is an octal, 10-bit, resistor string digital-toanalogue converter. The eight individual DACs contained in the IC can be switched in pairs between fast and slow (low power) operation modes, or powered down, under software control. Alternatively, the whole device can be powered down, reducing current consumption to less than 0.1A.
The DAC outputs are buffered by a rail-to-rail amplifier with a gain of two, which is configurable as Class A (fast mode) or Class AB (for low-power mode).
The WM2631 has been designed to interface directly to industry standard microprocessors and DSPs, and can operate on two separate analogue and digital power supplies. It is programmed with a 16-bit serial word comprising 4 address bits and up to 12 DAC or control register data bits. All eight DACs can be simultaneously forced to a preset value using a preset input pin.
A daisy-chain data output makes it possible to control several of Wolfson's octal DACs from the same interface, without increasing the number of control lines.
The WM2631 is available in a 20-pin TSSOP package. Commercial temperature (0° to 70°C) and Industrial temperature (-40° to 85°C) variants are supported.
WM2631 Data Sheet
