I recently purchased LTC1564. I wired it up according to the reference schematic given in the datasheet (Shown below)
Here are the things I tried
1. Single supply configuration
V+ = 5V
V- = GND
G3 = G2 = G1 = G0 = 0 (1V/V passband gain)
F3 = F1 = F0 = 0 , F2 = 1 (40kHz cutoff)
Input voltage: 1V p-p sine wave with frequencies ranging from 100Hz to 100kHz
2. Dual supply configuration
V- = -5V
Input voltage = 1V p-p sine wave with frequencies ranging from 100Hz to 100kHz
In both the configurations all I am getting on the output side is a 50mV p-p noisy signal having the same frequency as the input for the entire frequency range mentioned above.
What could be the reason for this issue? How should I go about fixing it?
If pin 3 and 4 are at a Lo (0V) and pin 13 is at a Hi (VCC) the an LTC1564 will operate single or dual supply as set by the G and F inputs.
Note: For a single supply operation the AC input must be biased…
Note: For a single supply operation the AC input must be biased to VCC/2.