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AS1123
Datasheet - D e t a i l e d D e s c r i p t i o n
Error Detection Functions
Open-LED Detection
The AS1123 open-LED detection is based on the comparison between V DS and V THL . The open LED status is aquired at the rising edge of
OEN and stored internally. While detecting open-LEDs the output port must be turned on. Open LED detection can be started with 1 clock pulse
during error detection mode while the output port is turned on.
Note: LEDs which are turned off at test time cannot be tested and will be shown as a logic 1 in the detailed error report.
Table 6. Open LED Detection Modes
Output Port State
On
On
Effective Output
Point Conditions
V DS < V THL
V DS > V THL
Detected Open-LED
Error Status Code
0
1
Meaning
Open Circuit
Normal
Shorted-LED
The AS1123 shorted-LED detection is based on the comparison between V DS and V THH . The shortened LED status is acquired at the rising
edge of OEN and stored internally. While detecting shorted-LEDs the output port must be turned on. Shorted-LED detection can be started with
2 clock pulses during error detection mode while the output port is turned on.
For valid results, the voltage at OUTN0:OUTN15 must be lower then V THH under low-current diagnostic mode operating conditions. This can be
achieved by reducing the V LED voltage or by adding additional diodes, resistors or LED’s.
Note: LEDs which are turned off at test time cannot be tested and will be shown as a logic 1 in the detailed error report.
Table 7. Shorted LED Detection Modes
Output Port State
On
On
Effective Output
Point Conditions
V DS > V THH
V DS < V THH
Detected Shorted-LED
Error Status Code
0
1
Meaning
Short Circuit
Normal
Overtemperature
Thermal protection for the AS1123 is provided by continuously monitoring the device’s core temperature. The overtemperature status is acquired
at the rising edge of OEN and stored internally.
Table 8. Overtemperature Modes
Output Port State
Don’t Care
Don’t Care
Effective Output
Point Conditions
Temperature > T OV1
Temperature < T OV1
Detected Overtemperature
Status Code
0
1
Meaning
Overtemperature Condition
Normal
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相关代理商/技术参数
AS1123-XXX-I-A1-D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1123-XXX-I-A1-S 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1123-XXX-I-A2-D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1123-XXX-I-A2-S 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1123-XXX-I-A3-D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1123-XXX-I-A3-S 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1123-XXX-I-L-A1-D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1123-XXX-I-L-A1-S 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter