PowerWise® Design University
High Speed ADCs
The PSRR specification found on most data sheets indicates:
The device rejection of noise on the power supply
How a given parameter changes between two different supply voltages
How different noise frequencies will affect the operation of the device
How different noise frequencies will affect the operation of the device
If a transmission line is driven with a device having a source impedance of 50 Ohms and the characteristic impedance is 75 Ohms, what resistor value should be added if an A.C. termination is used?
125 Ohms
30 Ohms
25 Ohms
75 Ohms
Adding dither to an ADC input can improve distortion performance at a slight cost of noise.
True
False
Beyond what line length should the line be properly terminated if an ADC clock signal has a 1.2 ns rise time? (assume PCB is typical FR-4 material)
0.96 in
1.33 in
1.5 in
2.7 in
What is the acquisition time?
Minimum time required to acquire a new input voltage
Average time required to acquire a new input voltage
Maximum time required to acquire a new input voltage
The time during which the signal is being disconnected from the hold capacitor
