Datasheet

SLDU010
TI CONFIDENTIAL – NDA Restrictions
Page 29 of 50
7.2.2.4 Trans-Z
The “Trans-Z” selection boxes control the transimpedance resistance by controlling bits 0 and 1
in ESFR 0xA7.
7.2.3 ZTC and PTAT Offset Control
The ZTC and PTAT Offset circuits are shared whether the user is using the PGA400-Q1 in
resistive or capacitive mode, therefore they are displayed while either AFE tab is selected. An
image and description of the buttons on the offset control region of the GUI are described below.
Figure 22. ZTC and PTAT Offset Control
7.2.3.1 Offset ZTC Compenstation Read/Set
The “Read” and “Set” buttons in the Offset ZTC Compensation region can be used to directly
enter in the desired offset values. The buttons either read to or write from the ZTC offset bits in
ESFRs 0xA3/0xA4 or 0xA5/0xA6 depending on the state of the “Sensor Select” combo-box.
7.2.3.2 Offset ZTC Compenstation Adjust Up/Down
The “Coarse” Up/Down and “Fine” Up/Down buttons are used to adjust the value of the ZTC
offset register up or down in set increments. The buttons write to the ZTC offset bits in ESFRs
0xA3/0xA4 or 0xA5/0xA6 depending on the state of the “Sensor Select” combo-box. The “Fine”
adjustments move the ZTC offset value by one, while the “Coarse” buttons move the ZTC offset
value by 50.
7.2.3.3 Offset PTAT Compenstation Read/Set
The “Read” and “Set” buttons in the Offset PTAT Compensation region can be used to directly
enter in the desired offset values. The buttons either read to or write from the PTAT offset bits in
ESFRs 0xA4 or 0xA6 depending on the state of the “Sensor Select” combo-box.