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Reference Manual ADuCM356

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LOW-POWER TIA CONTROL BITS CHANNEL 0 REGISTER

Address: 0x400C20EC, Reset: 0x00000003, Name: LPTIACON0

Table 109. Bit Descriptions for LPTIACON0

Bits Bit Name Settings Description Reset Access

[31:16] Reserved Reserved. 0x0 R

[15:13] TIARFILT Set Low-Pass Filter Resistor. Configures TIA output low-pass filter cutoff frequency. 0x0 R/W

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.

[12:10] TIARL Set R

LOAD

. 0x0 R/W

0 0 Ω.

1 10 Ω.

10 30 Ω.

11 50 Ω.

100 100 Ω.

101 1.6 kΩ. R

TIA

gain resistor must be ≥2 kΩ.

110 3.1 kΩ. R

TIA

gain resistor must be ≥4 kΩ.

111 3.6 kΩ. R

TIA

gain resistor must be ≥4 kΩ.

[9:5] TIAGAIN Set R

TIA

. 0x0 R/W

0 Disconnect R

TIA

1 200 Ω. Intended for oxygen sensor. R

TIA

is combination of R

LOAD

and a fixed series 110 Ω. Assume

LOAD

= 10 Ω. Set by the TIARL bit. R

TIA

gain setting = 100 Ω − R

LOAD

+ 110 Ω fixed. Overall TIA gain is

200.

10 1 kΩ. If R

LOAD

≤ 100 Ω, R

TIA

gain = (100 Ω − R

LOAD

) + 1 kΩ. If R

LOAD

> 100 Ω, R

TIA

gain is not supported

with a 1 kΩ R

TIA

11 2 kΩ. R

TIA

gain = 2 kΩ − (R

LOAD

− 100 Ω).

100 3 kΩ. R

TIA

gain = 3 kΩ − (R

LOAD

− 100 Ω).

101 4 kΩ. R

TIA

gain = 4 kΩ − (R

LOAD

− 100 Ω).

110 6 kΩ. R

TIA

gain = 6 kΩ − (R

LOAD

− 100 Ω).

111 8 kΩ. R

TIA

gain = 8 kΩ − (R

LOAD

− 100 Ω).

1000 10 kΩ. R

TIA

gain = 10 kΩ − (R

LOAD

− 100 Ω).

1001 12 kΩ. R

TIA

gain = 12 kΩ − (R

LOAD

− 100 Ω).

1010 16 kΩ. R

TIA

gain = 16 kΩ − (R

LOAD

− 100 Ω).

1011 20 kΩ. R

TIA

gain = 20 kΩ − (R

LOAD

− 100 Ω).

1100 24 kΩ. R

TIA

gain = 24 kΩ − (R

LOAD

− 100 Ω).

1101 30 kΩ. If R

LOAD

≤ 100 Ω, R

TIA

gain = (100 Ω − R

LOAD

) + 30 Ω. If R

LOAD

> 100 Ω, R

TIA

gain = 30 kΩ −

LOAD

− 100 Ω).

1110 32 kΩ. R

TIA

gain = 32 kΩ − (R

LOAD

− 100 Ω).

1111 40 kΩ. R

TIA

gain = 40 kΩ − (R

LOAD

− 100 Ω).

10000 48 kΩ. R

TIA

gain = 48 kΩ − (R

LOAD

− 100 Ω).

10001 64 kΩ. R

TIA

gain = 64 kΩ − (R

LOAD

− 100 Ω).

10010 85 kΩ. R

TIA

gain = 85 kΩ − (R

LOAD

− 100 Ω).

10011 96 kΩ. R

TIA

gain = 96 kΩ − (R

LOAD

− 100 Ω).

Brand	Analog Devices
Model	ADuCM356
Category	Microcontrollers
Language	English

Analog Devices ADuCM356 User Manual

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Analog Devices ADuCM356 Specifications