Register Details: Low Power Tia/Potentiostat And Dac Circuits; Low-Power Tia Control Bits Channel 0 Register - Analog Devices ADuCM356 Reference Manual

Reference Manual

REGISTER DETAILS: LOW POWER TIA/POTENTIOSTAT AND DAC CIRCUITS

LOW-POWER TIA CONTROL BITS CHANNEL 0 REGISTER

Address: 0x400C20EC, Reset: 0x00000003, Name: LPTIACON0
Table 109. Bit Descriptions for LPTIACON0
Bits Bit Name Settings
[31:16] Reserved
[15:13] TIARFILT
[12:10] TIARL
[9:5] TIAGAIN
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Description
Reserved.
Set Low-Pass Filter Resistor. Configures TIA output low-pass filter cutoff frequency.
0 Disconnect TIA output from the AIN4_LPF0 pin. Useful for diagnostics where fast response is required
from the ADC. This bit setting disconnects the low-power TIA output from the low-pass filter capacitor.
1 Bypass resistor. 0 Ω option.
10 20 kΩ.
11 100 kΩ.
100 200 kΩ.
101 400 kΩ.
110 600 kΩ.
111 1 MΩ. Recommended value for optimal DC current measurement performance. Lowest cutoff frequency
setting for low-pass filter.
Set R .
LOAD
0 0 Ω.
1 10 Ω.
10 30 Ω.
11 50 Ω.
100 100 Ω.
101 1.6 kΩ. R gain resistor must be ≥2 kΩ.
TIA
110 3.1 kΩ. R gain resistor must be ≥4 kΩ.
TIA
111 3.6 kΩ. R gain resistor must be ≥4 kΩ.
TIA
Set R .
TIA
0 Disconnect R .
TIA
1 200 Ω. Intended for oxygen sensor. R
R = 10 Ω. Set by the TIARL bit. R
LOAD
200.
10 1 kΩ. If R ≤ 100 Ω, R
LOAD TIA
with a 1 kΩ R .
TIA
11 2 kΩ. R gain = 2 kΩ − (R
TIA LOAD
100 3 kΩ. R gain = 3 kΩ − (R
TIA LOAD
101 4 kΩ. R gain = 4 kΩ − (R
TIA LOAD
110 6 kΩ. R gain = 6 kΩ − (R
TIA LOAD
111 8 kΩ. R gain = 8 kΩ − (R
TIA LOAD
1000 10 kΩ. R gain = 10 kΩ − (R
TIA
1001 12 kΩ. R gain = 12 kΩ − (R
TIA
1010 16 kΩ. R gain = 16 kΩ − (R
TIA
1011 20 kΩ. R gain = 20 kΩ − (R
TIA
1100 24 kΩ. R gain = 24 kΩ − (R
TIA
1101 30 kΩ. If R ≤ 100 Ω, R
LOAD TIA
(R − 100 Ω).
LOAD
1110 32 kΩ. R gain = 32 kΩ − (R
TIA
1111 40 kΩ. R gain = 40 kΩ − (R
TIA
10000 48 kΩ. R gain = 48 kΩ − (R
TIA
10001 64 kΩ. R gain = 64 kΩ − (R
TIA
10010 85 kΩ. R gain = 85 kΩ − (R
TIA
10011 96 kΩ. R gain = 96 kΩ − (R
TIA
is combination of R and a fixed series 110 Ω. Assume
TIA LOAD
gain setting = 100 Ω − R
TIA
gain = (100 Ω − R ) + 1 kΩ. If R
LOAD LOAD
− 100 Ω).
− 100 Ω).
− 100 Ω).
− 100 Ω).
− 100 Ω).
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
gain = (100 Ω − R ) + 30 Ω. If R
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
− 100 Ω).
LOAD
ADuCM356
+ 110 Ω fixed. Overall TIA gain is
LOAD
> 100 Ω, R gain is not supported
TIA
> 100 Ω, R gain = 30 kΩ −
LOAD TIA
Reset Access
0x0 R
0x0 R/W
0x0 R/W
0x0 R/W
Rev. A | 89 of 312