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AS7038RB

Functional Description

Datasheet

• PUBLIC

DS000726

• v2-00 • 2021-Jun-02

126

│ 40

pd_ampres

pd1234(1)

pd_ampcap

pd_ampcomp

pd_ampvo

gain

Low Bandwidth Mode

1…4

7 V/µA

Integrating Mode (pd_ampres=0)

1…4

1 V/pQ

1…4

1/2V/pQ

1…4

1/3V/pQ

(1)

pd1234 … number of active photodiodes (for example, pd1=1, pd2=0, pd3=1, pd4=0 -> pd1234=2)

7.1.6

Photodiode TIA Registers

PD_AMPRCCFG Register (Address 0x1d)

Figure 34:

PD_AMPRCCFG Register

Addr: 0x1d

PD_AMPRCCFG

Bit

Bit Name

Default

Access

Bit Description

7:5

pd_ampres

Feedback resistor

Setting

Resistance

No resistor in feedback

of amplifier

–

photocurrent integrator

MΩ

4:0

pd_ampcap

Feedback capacitor =pd_ampcap * 0.1 pF

The PD_AMPCFG register is used to configure the operating mode of the photoamplifier.

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