AS7038RB datasheet(42/127 Pages) AMSOSRAM

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AS7038RB

Functional Description

Datasheet

• PUBLIC

DS000726

• v2-00 • 2021-Jun-02

126

│ 41

PD_AMPCFG Register (Address 0x1e)

Figure 35:

PD_AMPCFG Register

Addr: 0x1e

PD_AMPCFG

Bit

Bit Name

Default

Access

Bit Description

pd_amp_en

0: Activates power down mode of photo-amplifier

1: Enables photo-amplifier (direct or automatic

pd_amp_auto mode) also set en_bias_ofe=1

pd_amp_auto

0: Normal TIA mode

1: Enable TIA only when seq_itg is set (i.e.

controlled by sequencer itg setting) also set

en_bias_ofe=1

5:2

pd_ampvo

OpAmp offset Can be used to limit signal in

darkness and to shorten rise times

1:0

pd_ampcomp

OpAmp compensation, depending on gain and

number of used photo diodes Capacitor =

pd_ampcap*0.1 pF

PD_THRESHCFG Register (Address 0x1f)

Figure 36:

PD_THRESHCFG Register

Addr: 0x1f

OFE1_PD_THCF

Bit

Bit Name

Default

Access

Bit Description

7:4

ofe1_pd_clipdetect_h_thresh

If the voltage on the output of the TIA

exceed this threshold the

irq_clipdetect interrupt is asserted. The

threshold is defined as

0: 1824 mV

1: 1748 mV

2: 1672 mV

3: 1596 mV

4: 1520 mV

5:1444 mV

6: 1368 mV

7: 1292 mV

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