SBAS793A November 2019 – April 2020 DAC60502 , DAC70502 , DAC80502
PRODUCTION DATA.
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
RESERVED | REF-DIV | RESERVED | BUFF-B-GAIN | BUFF-A-GAIN | |||||||||||
R/W-0h | R/W-0h | R/W-0h | R/W-1h | R/W-1h |
Bit | Field | Type | Reset | Description |
---|---|---|---|---|
15-9 | RESERVED | RW | 0h | RESERVED |
8 | REF-DIV | RW | 0h |
The reference voltage to the device (either from the internal or external reference) can be divided by a factor of two by setting the REF-DIV bit to 1. Make sure to configure REF-DIV so that there is sufficient headroom from VDD to the DAC operating reference voltage. Improper configuration of the reference divider triggers a reference alarm condition. In the case of an alarm condition, the reference buffer is shut down, and all the DAC outputs go to 0 V. The DAC data registers are unaffected by the alarm condition, and thus enable the DAC output to return to normal operation after the reference divider is configured correctly. When set to 1 the reference voltage is internally divided by a factor of 2. When cleared to 0 the reference voltage is unaffected. |
7-2 | RESERVED | RW | 0h | RESERVED |
1 | BUFF-B-GAIN | RW | 1h |
When set to 1 the buffer amplifier for corresponding DAC has a gain of 2. When cleared to 0 the buffer amplifier for corresponding DAC has a gain of 1. |
0 | BUFF-A-GAIN | RW | 1h |
When set to 1 the buffer amplifier for corresponding DAC has a gain of 2. When cleared to 0 the buffer amplifier for corresponding DAC has a gain of 1. |