Arduino Opta® Analog Expansion

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Arduino Opta® Analog Expansion

Modified: 15/11/2024

2.3 Outputs

Characteristics

Details

Number of channels

8x, (2x used simultaneously recommended)

Channels programmable as outputs

I1, I2, I3, I4, O1, I5, I6, O2

Type of outputs supported

Analog voltage and current

DAC resolution

13 bit

Charge pump for zero voltage output

Yes

All eight analog channels can be used as outputs but due to power dissipation limitations, it is recommended to have up to

2 channels set at output at the same time.

At 25°C of ambient temperature, all the 8 channels set as outputs have been tested at the same time while outputting

more than 24 mA at 10 V each (>0.24W per channel).

2.3.1 Voltage Output Mode

This output mode lets you control voltage-driven actuators.

Characteristics

Details

Analog output voltage

0...11 V

Resistive load range

500 Ω...100 kΩ

Maximum capacitive load

2 μF

Short-circuit current per channel

(sourcing)

Min: 25 mA, Typ: 29 mA, Max: 32 mA (lower limit bit = 0 (default)), Min: 5.5 mA,

Typ: 7 mA, Max: 9 mA (lower limit bit = 1)

Short-circuit current per channel

(sinking)

Min: 3.0 mA, Typ: 3.8 mA, Max: 4.5 mA

Accuracy

+/- 1%

Repeatability

+/- 1%

2.3.2 Current Output Mode

This output mode lets you control current-driven actuators.

Characteristics

Details

Analog output current

0...25 mA

Maximum output voltage when sourcing 25 mA

11.9 V ± 20%

Open circuit voltage

16.9 V ± 20%

Output impedance

Min: 1.5 MΩ, Typ: 4 MΩ

Accuracy

1% in 0-10 mA range, 2% in 10-24 mA range

Repeatability

1% in 0-10 mA range, 2% in 10-24 mA range