Dear Sir,

Thank you very much!

## Top Replies

Please see example below, you can base your own calculations on it.

- 8 DACs,

- Internal Reference (2.5V)

- Gain = …

• No Problem. You are correct, should be -35.52°C.

Regards,

Mike.

Parents
• Hi ,

Please see example below, you can base your own calculations on it.

- 8 DACs,

- Internal Reference (2.5V)

- Gain = 2

- VDD = 5V, VLogic = 1.8

- 1k load on each channel

- Each DAC output = 1V

IDD = 1.6mA (Datasheet spec table)

ILogic = 3.5uA (Datasheet spec table)

Power Consumption (Unloaded) = (1.6mA * 5V) + (3.5uA * 1.8V) = 8mW

Driving 1V with a 1k load would give a current of 1mA out on each channel.

The internal amplifiers in the DAC is supplied with 5V. The output of these amplifiers will be 1V. Therefore, 4V must be dropped in the device at 1mA. Power dissipated per channel = 1mA * 4V = 4mW.

On 8 channels, this is 32mW.

Total Power Dissipated = 40mW.

Increase in temperature = 4.48°C

Tj at ambient -40°C = 35.52°C

Tj at ambient 85°C = 89.48°C

Regards,

Mike.

• Hi ,

Please see example below, you can base your own calculations on it.

- 8 DACs,

- Internal Reference (2.5V)

- Gain = 2

- VDD = 5V, VLogic = 1.8

- 1k load on each channel

- Each DAC output = 1V

IDD = 1.6mA (Datasheet spec table)

ILogic = 3.5uA (Datasheet spec table)

Power Consumption (Unloaded) = (1.6mA * 5V) + (3.5uA * 1.8V) = 8mW

Driving 1V with a 1k load would give a current of 1mA out on each channel.

The internal amplifiers in the DAC is supplied with 5V. The output of these amplifiers will be 1V. Therefore, 4V must be dropped in the device at 1mA. Power dissipated per channel = 1mA * 4V = 4mW.

On 8 channels, this is 32mW.

Total Power Dissipated = 40mW.

Increase in temperature = 4.48°C

Tj at ambient -40°C = 35.52°C

Tj at ambient 85°C = 89.48°C

Regards,

Mike.

Children
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