Other Parts Discussed in Thread: PGA117, OPA2314
Hello Everyone,
In a project related to acoustics, I should select sequencely 10 microphone pre-amplified and be able to change thier gain.
I found the pga116/7 which seems well suited to do this.
But i've some trouble to make it run with the spi interface.
The sequence code i sent are : (see table 3 page 29 of datasheet)
0x E1F1 (225 241) - Shutdown Enable circuit
0x 2A20 (42 32) - Write select Ch0, G=4
0x 2A20 (42 54) - Write select Ch4, G=32
0x E100 (225 0) - Shutdown Diseble circuit
But i don't get what i expected.
Any help gratefully received!
Many thank's in advance
Romano