AD74115H datasheet(86/113 Pages) AD

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Data Sheet

AD74115H

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Rev. 0 | 86 of 113

Digital Output with External FET Configuration Register

Address: 0x09, Reset: 0x2E00, Name: DO_EXT_CONFIG

This register configures the settings for the external digital output function. When the digital output functionality is enabled, the recommended

configuration of the CH_FUNC_SETUP register is to set it to high impedance.

Table 48. Bit Descriptions for DO_EXT_CONFIG

Bits

Bit Name

Description

Reset

Access

RESERVED

Reserved.

0x0

DO_DATA_EXT

FET Drive.

0x0

R/W

0: switch off the FET.

1: switch on the FET.

[13:9]

DO_EXT_T2

External Digital Output Short-Circuit 2 Timer. Set these bits to program the T2 short-circuit duration.

If a short-circuit event duration exceeds this time, the DO_EXT_TIMEOUT alert bit is asserted in the

ALERT_STATUS register. Setting this register to 0 results in the minimum timer count and activation of the T2

timer when a short circuit is detected. Take care when setting T2 to infinity because this can cause thermal

damage to the selected external FET.

0x17

R/W

00: T2 100.812 μs.

01: T2 100.812 μs.

02: T2 100.812 μs.

03: T2 100.812 μs.

04: T2 100.812 μs.

05: T2 100.812 μs.

06: T2 100.812 μs.

07: T2 100.812 μs.

08: T2 130.08 μs.

09: T2 180.486 μs.

10: T2 240.648 μs.

11: T2 320.322 μs.

12: T2 420.321 μs.

13: T2 560.157 μs.

14: T2 750.399 μs.

15: T2 1.000803 ms.

16: T2 1.3008 ms.

17: T2 1.800795 ms.

18: T2 2.400789 ms.

19: T2 3.200781 ms.

20: T2 4.200771 ms.

21: T2 5.600757 ms.

22: T2 7.500738 ms.

23: T2 10.000713 ms.

24: T2 13.000683 ms.

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