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Reference Manual ADuCM356

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HIGH-SPEED R

TIA

CONFIGURATION REGISTER

Address: 0x400C20F0, Reset: 0x0000000F, Name: HSRTIACON

This register controls the high-speed TIA R

TIA

, current protection diode, and feedback capacitor.

Table 122. Bit Descriptions for HSRTIACON

Bits Bit Name Settings Description Reset Access

[31:13] Reserved Reserved. 0x0 R

[12:5] CTIACON Configure Capacitor in Parallel with R

TIA

. This capacitor improves the amplifier loop stability.

When the bit is set, the capacitor is added in parallel with R

TIA

. This capacitor forms a resistor/

capacitive (RC) filter with R

TIA

value selected by the RTIACON bits. Ensure that the cutoff setting

is larger than input signal frequency. For best stability, use as large a capacitor value as possible

(up to 31 pF).

0x0 R/W

00000000 0 pF.

00000001 1 pF.

00000010 2 pF.

00000100 4 pF.

00001000 8 pF.

00010000 16 pF.

00100000 Reserved.

x1xxxxxx Not used.

4 TIASW6CON SW6 Control. Use SW6 to select whether to use diode in parallel with R

TIA

or not. 0x0 R/W

0 SW6 off, diode is not in parallel with R

TIA

1 SW6 on, diode is in parallel with R

TIA

[3:0] RTIACON Configure General R

TIA

Value. To use this R

TIA

, set TSWFULLCON, Bit 8 = 1 and

TSWFULLCON, Bits[10:9] = 00.

0xF R/W

0000 R

TIA

= 200 Ω.

0001 R

TIA

= 1 kΩ.

0010 R

TIA

= 5 kΩ.

0011 R

TIA

= 10 kΩ.

0100 R

TIA

= 20 kΩ.

0101 R

TIA

= 40 kΩ.

0110 R

TIA

= 80 kΩ.

0111 R

TIA

= 160 kΩ.

1000 to 1111 R

TIA

is open.

DE1 HIGH-SPEED TIA RESISTOR CONFIGURATION REGISTER

Address: 0x400C20F4, Reset: 0x000000FF, Name: DE1RESCON

Table 123. Bit Descriptions for DE1RESCON

Bits Bit Name Settings Description Reset Access

[31:8] Reserved Reserved. 0x0 R

[7:0] DE1RCON DE1 R

LOAD05

and R

TIA2_05

Setting. DE1 high-speed TIA resistor settings. To use this R

LOAD

, open

T9 and T10 switches, but close T11 by setting TSWFULLCON, Bits[10:8] = 0b100. To set R

LOAD05

and R

TIA2_05

resistor values, see Table 120.

0xFF R/W

DE0 HIGH-SPEED TIA RESISTOR CONFIGURATION REGISTER

Address: 0x400C20F8, Reset: 0x000000FF, Name: DE0RESCON

Brand	Analog Devices
Model	ADuCM356
Category	Microcontrollers
Language	English

Analog Devices ADuCM356 User Manual

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