WM2610
Production Data
DEVICE DESCRIPTION
GENERAL FUNCTION
The WM2610 is an octal 12-bit, voltage output DAC. It contains a serial interface, control logic for
speed and power down, a programmable voltage reference, and eight digital to analogue converters.
Each converter uses a resistor string network buffered with an op amp to convert 12-bit digital data to
analogue voltage levels (see Block Diagram). The output voltage is determined by the reference
input voltage and the input code according to the following relationship:
CODE
Output voltage = V
×
REF
4096
INPUT
OUTPUT
4095
1111
1111
1111
V
V
×
REF
4096
:
:
1000
1000
0000
0001
2049
4096
×
REF
0000
1111
0000
1111
V
2048
4096
REF
V
×
=
REF
2
0111
2047
4096
V
×
REF
:
:
0000
0000
0000
0001
0000
V
REF
4096
0V
0000
Table 1 Binary Code Table
POWER ON RESET
An internal power-on-reset circuit resets the DAC register to all 0s on power-up.
BUFFER AMPLIFIER
The output buffer has a near rail-to-rail output with short circuit protection and can reliably drive a
2kΩ load with a 100pF load capacitance.
WOLFSON MICROELECTRONICS LTD
PD Rev 1.0 February 2001
8
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
