SLLSEK1B July 2014 – March 2018 ONET2804T
The TIAs have DC offset cancellation to maintain a 50% crossing point; however, the crossing point can be adjusted using the TRSH pad (pad 41) in pad control mode. No threshold adjustment is applied if the pad is left open. The crossing point is shifted up approximately 12% if the pad is tied to ground, and it is shifted down approximately 12% if the pad is tied to VCC. In 2-wire control mode, the crossing point can be adjusted up or down using register settings TH[0..3] in registers 2, 8, 14 and 20 for channels 1, 2, 3 and 4.