Low Power Tia Switch Configuration For Channel 0 Register - Analog Devices ADuCM355 Hardware Reference Manual

UG-1262
Bits Bit Name Settings
10101
10110
10111
11000
11001
11010
[4:3] IBOOST
2 HALFPWR
1 PAPDEN
0 TIAPDEN

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
[31:16] Reserved
15 RECAL
14 VZEROSHARE
13 TIABIASSEL
12 PABIASSEL
11 SW11
10 SW10
Description
120 kΩ. R gain = 120 kΩ − (R
TIA
128 kΩ. R gain = 128 kΩ − (R
TIA
160 kΩ. R gain = 160 kΩ − (R
TIA
196 kΩ. R gain = 196 kΩ − (R
TIA
256 kΩ. R gain = 256 kΩ − (R
TIA
512 kΩ. R gain = 512 kΩ − (R
TIA
Current Boost Control.
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.
Half Power Mode Select. Control bit to reduce active power consumption of TIA and
potentiostat amplifiers for Sensor Channel 0.
0 Normal mode. Default value.
1 Reduce potentiostat amplifier and TIA current by half. Degrades performance.
Potentiostat Amplifier Power Down. Low power Potentiostat Amplifier 0 power-down
control bit.
0 Power up.
1 Power down.
TIA Power Down. Low power TIA0 power-down control bit.
0 Power up.
1 Power down.
Description
Reserved.
TIA SW15 Control. Active high.
0 Disconnect potentiostat amplifier for Channel 0 output from the RE0 pin.
1 Connect Potentiostat Amplifier 0 output to the RE0 pin.
TIA SW14 Control. Active high.
0 Turn off switch. Default.
1 Short TIA0 input to TIA1 input and share the VZEROx pin.
TIA SW13 Control. Active high.
0 Disconnect TIA bias voltage from the VZERO0 pin.
1 Connect TIA bias voltage to the VZERO0 pin.
TIA SW12 Control. Active high.
0 Disconnect potentiostat amplifier bias voltage from the VBIAS0 pin.
1 Connect potentiostat amplifier bias voltage to the VBIAS0 pin.
SW11 Switch Control Active High.
0 Open switch.
1 Close switch.
SW10 Switch Control Active High.
0 Open switch.
1 Close switch.
ADuCM355
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
Rev. B | Page 94 of 312
Hardware Reference Manual
Reset Access
0x0 R/W
0x0 R/W
0x1 R/W
0x1 R/W
Reset Access
0x0 R
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W