Reference Manual ADuCM356
REGISTER DETAILS: LOW POWER TIA/POTENTIOSTAT AND DAC CIRCUITS
analog.com Rev. A | 90 of 312
Table 109. Bit Descriptions for LPTIACON0 (Continued)
Bits Bit Name Settings Description Reset Access
10100 100 kΩ. R
TIA
gain = 100 kΩ − (R
LOAD
− 100 Ω).
10101 120 kΩ. R
TIA
gain = 120 kΩ − (R
LOAD
− 100 Ω).
10110 128 kΩ. R
TIA
gain = 128 kΩ − (R
LOAD
− 100 Ω).
10111 160 kΩ. R
TIA
gain = 160 kΩ − (R
LOAD
− 100 Ω).
11000 196 kΩ. R
TIA
gain = 196 kΩ − (R
LOAD
− 100 Ω).
11001 256 kΩ. R
TIA
gain = 256 kΩ − (R
LOAD
− 100 Ω).
11010 512 kΩ. R
TIA
gain = 512 kΩ − (R
LOAD
− 100 Ω).
[4:3] IBOOST Current Boost Control. 0x0 R/W
00 Normal mode.
01 Increase amplifier output stage current to quickly charge external capacitor load. Intended for use with
high current sensors, such as oxygen electrochemical sensor.
10 Double TIA and potentiostat amplifiers overall quiescent current. Increases amplifier bandwidth. Useful
for diagnostic tests.
11 Double TIA and potentiostat amplifiers overall quiescent current and increase output stage current.
Increases amplifier bandwidth and output current capability. Useful for diagnostic tests with high current
sensors like the oxygen electrochemical sensor.
2 HALFPWR Half Power Mode Select. Control bit to reduce active power consumption of TIA and potentiostat
amplifiers for Sensor Channel 0.
0x0 R/W
0 Normal mode. Default value.
1 Reduce potentiostat amplifier and TIA current by half. Degrades performance.
1 PAPDEN Potentiostat Amplifier Power Down. Low-power Potentiostat Amplifier 0 power-down control bit. 0x1 R/W
0 Power up.
1 Power down.
0 TIAPDEN TIA Power Down. Low-power TIA0 power-down control bit. 0x1 R/W
0 Power up.
1 Power down.
LOW-POWER TIA SWITCH CONFIGURATION FOR CHANNEL 0 REGISTER
Address: 0x400C20E4, Reset: 0x00000000, Name: LPTIASW0
See Figure 16 for details on the switches mentioned in this register.
Table 110. Bit Descriptions for LPTIASW0
Bits Bit Name Settings Description Reset Access
[31:16] Reserved Reserved. 0x0 R
15 RECAL TIA SW15 Control. Active high. 0x0 R/W
0 Disconnect potentiostat amplifier for Channel 0 output from the RE0 pin.
1 Connect Potentiostat Amplifier 0 output to the RE0 pin.
14 VZEROSHARE TIA SW14 Control. Active high. 0x0 R/W
0 Turn off switch. Default.
1 Short TIA0 input to TIA1 input and share the VZEROx pin.
13 TIABIASSEL TIA SW13 Control. Active high. 0x0 R/W
0 Disconnect TIA bias voltage from the VZERO0 pin.
1 Connect TIA bias voltage to the VZERO0 pin.
12 PABIASSEL TIA SW12 Control. Active high. 0x0 R/W
0 Disconnect potentiostat amplifier bias voltage from the VBIAS0 pin.
1 Connect potentiostat amplifier bias voltage to the VBIAS0 pin.
11 SW11 SW11 Switch Control Active High. 0x0 R/W
0 Open switch.
To Next Page
Loading...
Need help?
General