Thanks Leo, R1 = 399kohm R2 = 18.73kohm Rext = 13.75kohm So I am using the lowest gain setting at the moment. I originally had it set for the 100V setting with the same result. Here is my init procedure: After power up Read from Reg 0x01 => 0x28 Read from Reg 0x02 => 0x40 Write to Reg 0x02 value 0x00 (clear standby) Read from Reg 0x01 => 0x28 Read from Reg 0x02 => 0x00 Write to Reg 0x01 value 0x04 (set to analog input & 25V Gain Setting) Read from Reg 0x01 => 0x04 Read from Reg 0x02 => 0x00 Write to Reg 0x02 value 0x02 (set override) Read from Reg 0x01 => 0x28 Read from Reg 0x02 => 0x40 Does it make sense that I am not reading the ChipID of 5 back once I've written 0x04 to Reg 0x01? (those bits are RO). To add to the mystery, given all the same parameters if I insert the three different DRV2665 boards I have I get varying steady state current draws. One is 2mA, the other 25mA and the third is 55mA. Some fluctuation when I communicate with it. That doesn't line up with what I would expect based on the Iq current in the datasheet. Thanks, Chris
↧
