User's Manual
Table Of Contents
- RF Exposure Statement:
- Copyright
- Contents
- Table Index
- Figure Index
- Revision History
- 1Introduction
- 2Package Information
- 3Interface Application
- 4RF Specifications
- 5Electrical Specifications
- 6SMT Production Guide
- 7Packaging
- Appendix
A7608SA-H_User Manual_V1.00
2022-08-26
Smart Machine Smart Decision
3.13 Other interface
3.13.1
Sink Current Source
The ISINK pin is VBAT tolerant and intended to drive some passive devices, such as LCD
backlight and white LED, etc. Its output current can be up to 40mA and be set by the AT command
“AT+ CLEDITST”.
Table 19: Sink current electronic characteristic
Symbol
Description
Min.
Typ.
Max.
Unit
V
ISINK
Voltage tolerant
0.5
-
VBAT
V
I
ISINK
Current tolerant
0
-
40
mA
ISINK is a ground-referenced current sink. The following figure shows its reference circuit.
Figure 29: ISINK reference circuit
Note: The sinking current can be adjusted to meet the design requirement through the AT
command “AT+ CLEDITST =<0>, <value>”.The “value” ranges from 0 to 8, on behalf of the
current from 0mA to 40mA by 5mA step.