ZHCSEJ3B June 2015 – April 2020 ADS131E08S
PRODUCTION DATA.
This register configures the test signal generation; see the Input Multiplexer section for more details.
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 1 | 1 | INT_TEST | 0 | TEST_AMP | TEST_FREQ[1:0] | |
R/W-1h | R/W-1h | R/W-1h | R/W-0h | R/W-0h | R/W-0h | R/W-0h |
LEGEND: R/W = Read/Write; -n = value after reset |
Bit | Field | Type | Reset | Description |
---|---|---|---|---|
7-5 | Reserved | R/W | 1h | Reserved.
Must be set to 1. This bit reads high. |
4 | INT_TEST | R/W | 0h | Test signal source.
This bit determines the source for the test signal. 0 = Test signals are driven externally 1 = Test signals are generated internally |
3 | Reserved | R/W | 0h | Reserved.
Must be set to 0. This bit reads low. |
2 | TEST_AMP | R/W | 0h | Test signal amplitude.
These bits determine the calibration signal amplitude. 0 = 1 × –(V(VREFP) – V(VREFN)) / 2400 1 = 2 × –(V(VREFP) – V(VREFN)) / 2400 |
1-0 | TEST_FREQ[1:0] | R/W | 0h | Test signal frequency.
These bits determine the test signal frequency. 00 = Pulsed at fCLK / 221 01 = Pulsed at fCLK / 220 10 = Not used 11 = At dc |