Hello,
Our customer met a question about the bias voltage configuration, he need 300mV bias voltage, and he changed the REFCN register, but it couldn't change it, first he configured 0X90, and tried 0x97,0x96,0x16,0x17 later, it had no effect, so how to configure the bias voltage?
#define LMP91000_I2C_Address (0x90) // Device Address
#define LMP91000_STATUS_REG (0x00) /* Read only status register */
#define LMP91000_LOCK_REG (0x01) /* Protection Register */
#define LMP91000_TIACN_REG (0x10) /* TIA Control Register */
#define LMP91000_REFCN_REG (0x11) /* Reference Control Register*/
#define LMP91000_MODECN_REG (0x12) /* Mode Control Register */
#define LMP91000_WRITE_LOCK (0x01)
#define LMP91000_WRITE_UNLOCK (0x00)
#define LMP91000_READY (0x01)
#define LMP91000_NOT_READY (0x00)
//#define LMP91000_TIACN_REG_VALUE (0x10) /* TIA_GAIN = 14kohm, RLOAD = 10ohm */
#define LMP91000_TIACN_REG_VALUE (0x13) /* TIA_GAIN = 7kohm, RLOAD = 10ohm */
#define LMP91000_REFCN_REG_VALUE (0x90) //90 /* External Ref, INT_Z 67%, 0% bias */
#define LMP91000_MODECN_REG_VALUE (0x03) //03 /* 3lead */
Best regards
Kailyn
