Analog Devices ADuCM355 Hardware Reference Manual page 96

UG-1262
Bits Bit Name Settings
[12:10] TIARL
100
101
110
111
[9:5] TIAGAIN
100
101
110
111
1000
1001
1010
1011
1100
1101
1110
1111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
[4:3] IBOOST
2 HALFPWR
Description
Set R .
LOAD
0 0 Ω.
1 10 Ω.
10 30 Ω.
11 50 Ω.
100 Ω.
1.6 kΩ. R must be ≥2 kΩ.
TIA
3.1 kΩ. R must be ≥4 kΩ.
TIA
3.6 kΩ. R must be ≥4 kΩ.
TIA
Set R .
TIA
0 Disconnect R .
TIA
1 200 Ω. Intended for oxygen sensor. TIA gain resistor is combination of R
series 110 Ω. Assume R
LOAD
R + 110 Ω fixed. Overall TIA gain is 200.
LOAD
10 1 kΩ. If R ≤ 100 Ω, R
LOAD TIA
supported with a 1 kΩ R
11 2 kΩ. R gain = 2 kΩ − (R
TIA
3 kΩ. R gain = 3 kΩ − (R
TIA
4 kΩ. R gain = 4 kΩ − (R
TIA
6 kΩ. R gain = 6 kΩ − (R
TIA
8 kΩ. R gain = 8 kΩ − (R
TIA
10 kΩ. R gain = 10 kΩ − (R
TIA
12 kΩ. R gain = 12 kΩ − (R
TIA
16 kΩ. R gain = 16 kΩ − (R
TIA
20 kΩ. R gain = 20 kΩ − (R
TIA
24 kΩ. R gain = 24 kΩ − (R
TIA
30 kΩ. If R ≤ 100 Ω, R
LOAD
30 kΩ − (R − 100 Ω).
LOAD
32 kΩ. R gain = 32 kΩ − (R
TIA
40 kΩ. R gain = 40 kΩ − (R
TIA
48 kΩ. R gain = 48 kΩ − (R
TIA
64 kΩ. R gain = 64 kΩ − (R
TIA
85 kΩ. R gain = 85 kΩ − (R
TIA
96 kΩ. R gain = 96 kΩ − (R
TIA
100 kΩ. R gain = 100 kΩ − (R
TIA
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 like 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 1.
0 Normal mode. Default value.
1 Reduce potentiostat amplifier and TIA current by half. Degrades performance.
ADuCM355
= 10 Ω. Set by the TIARL bit. R
gain = (100 Ω − R ) + 1 kΩ. If R
LOAD
.
TIA
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
gain = (100 Ω − R ) + 30 kΩ. If R
TIA LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
Rev. B | Page 96 of 312
Hardware Reference Manual
and fixed
LOAD
gain setting = 100 Ω −
TIA
> 100 Ω, R gain is not
LOAD TIA
> 100 Ω, R gain =
LOAD TIA
Reset Access
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W