Low-Power Tia Switch Configuration For Channel 0 Register - Analog Devices ADuCM356 Reference Manual

Reference Manual
REGISTER DETAILS: LOW POWER TIA/POTENTIOSTAT AND DAC CIRCUITS
Table 109. Bit Descriptions for LPTIACON0 (Continued)
Bits Bit Name Settings
[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
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Description
10100 100 kΩ. R gain = 100 kΩ − (R
TIA
10101 120 kΩ. R gain = 120 kΩ − (R
TIA
10110 128 kΩ. R gain = 128 kΩ − (R
TIA
10111 160 kΩ. R gain = 160 kΩ − (R
TIA
11000 196 kΩ. R gain = 196 kΩ − (R
TIA
11001 256 kΩ. R gain = 256 kΩ − (R
TIA
11010 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.
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
ADuCM356
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
Rev. A | 90 of 312