Question

Choose the temperature dependent parameter

(a) Common mode rejection ratio

(b) Voltage gain

(c) Output voltage swing

(d) Absolute maximum power dissipation

The question was asked in a dream while sleeping

Query is from Interpreting of Data Sheets topic in portion Operational Amplifier Characteristics of Linear Integrated Circuits

Answer 1

The correct answer is:

(b) Voltage gain

Explanation:

Voltage gain is typically temperature-dependent in operational amplifiers. As the temperature changes, the characteristics of the semiconductor materials and components inside the op-amp also change, which can impact the voltage gain. This can lead to a decrease or increase in the op-amp's gain with temperature fluctuations.

• Common mode rejection ratio (CMRR) can also vary with temperature but not as consistently as voltage gain.
• Output voltage swing is usually determined by the supply voltage and the internal design, but it may also be affected by temperature in some designs.
• Absolute maximum power dissipation is generally specified in the datasheet and is a limit, not something that typically varies with temperature, though the actual power dissipation might depend on the operating conditions.

So, voltage gain is the most directly temperature-dependent parameter listed.

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