To program the device gain to 46dB in ad624, the device needs to be connected according to the following specifications:
1. Connect Pin 5 (GAIN) to the positive supply voltage (V+) to set the gain to 1000.
2. Connect Pin 6 (REF) to GND to set the reference voltage to the inverting input voltage.
3. Connect Pin 7 (IN+) to the signal source.
4. Connect Pin 8 (IN-) to the input voltage reference.
5. Connect Pin 9 (OUT) to the load resistor or amplifier circuit.
To determine the bandwidth at this setting, we need to use the formula:
Unity-Gain Frequency = (Gain x Bandwidth) / (2 x π x Capacitance)
Rearranging the formula, we get:
Bandwidth = (Unity-Gain Frequency x 2 x π x Capacitance) / Gain
Substituting the given values, we get:
Bandwidth = (25MHz x 2 x π x 20pF) / 1000
Bandwidth = 1.57MHz
Therefore, the bandwidth at the setting of 46dB gain is 1.57MHz.
Describe the connection required to program the device gain to 46dB. Hence determine the bandwidth at this setting given the Unity-Gain Frequency of the device is 25MHz in ad624.
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