Register Details: Low Power Tia/Potentiostat And Dac Circuits; Low Power Tia Control Bits Channel 0 Register - Analog Devices ADuCM355 Hardware Reference Manual

ADuCM355 Hardware 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
100
101
110
111
[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
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.
200 kΩ.
400 kΩ.
600 kΩ.
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 Ω.
1.6 kΩ. R gain resistor must be ≥2 kΩ.
TIA
3.1 kΩ. R gain resistor must be ≥4 kΩ.
TIA
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
110 Ω. Assume R = 10 Ω. Set by the TIARL bit. R
LOAD
110 Ω fixed. Overall TIA gain is 200.
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
is combination of R
TIA
TIA
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 Ω. 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
Rev. B | Page 93 of 312
and a fixed series
LOAD
gain setting = 100 Ω − R +
LOAD
> 100 Ω, R gain is not
LOAD TIA
> 100 Ω, R gain =
LOAD TIA
UG-1262
Reset Access
0x0 R
0x0 R/W
0x0 R/W
0x0 R/W