GPIO Electrical Characteristics

Both the opto-isolated input and output have over current protection.

The output is open collector and thus requires a pull-up resistor to operate. The rise time and bias current is determined by the resistor value chosen. If the camera is generating an output signal that approaches the rise time plus the fall time of the circuit, care must be taken to optimize the pull-up resistor chosen to minimize the rise time while still remaining within the current limits of the output circuit.

The opto-isolated specifications listed below are applicable when power to the camera is provided through the interface and not through the GPIO.

Warning! To avoid damage, connect the OPTO_GND pin first before applying voltage to the GPIO line.
Warning! Prolonged use of the camera outside of the Operating Range described below may lead to unexpected behavior and should be avoided.

Operating Range

Description Minimum Maximum
Opto-isolated Input Voltage 0 V 30 V
Opto-isolated Output Voltage 0 V 24 V
Opto-isolated Output Current   25 mA
3.3 V Output Current   120 mA

 

Opto-isolated External Voltage Resistor Combinations

External
Voltage
External
Resistor
OPTO_OUT
Low Voltage
OPTO_OUT 
High Voltage
Output
Current
Output
Current Low
Output
Current High
No Load Load No Load Load No Load Load Load
3.3 V 200 Ω 1.47 V 1.44 V 3.25 V 2.64 V 8.4 mA 2.52 mA 8.52 mA
5 V 1.0 kΩ 0.92 V 0.86 V 5 V 2.29 V 3.9 mA 2.68 mA 4.04 mA
12 V 2.4 kΩ 1.08 V 1.02 V 12.08 V 3.78 V 4.54 mA 3.44 mA 4.56 mA
24 V 4.7 kΩ 1.3 V 1.08 V 24 V 6.36 V 4.78 mA 3.7 mA 4.82 mA
30 V 4.7 kΩ 1.4 V 1.32 V 30 V 11.08 V 5.96 mA 3.02 mA 5.08 mA
Values are for reference only

Opto-isolated input circuit—Cased

Opto-isolated output circuit—Cased

Non-isolated External Voltage Resistor Combinations

External
Voltage
External
Resistor
Current
3.3 V 1.0 kΩ 3.1 mA
5 V 1.0 kΩ 4.8 mA
12 V 2.0 kΩ 6 mA
12 V 2.4 kΩ 5 mA
24 V 4.7 kΩ 5.2 mA
30 V 4.7 kΩ 6.5 mA
Values are for reference only

Non-isolated input and output circuit—Cased