AS8579-ASST datasheet(32/44 Pages) OSRAM

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AS8579

Datasheet

• PUBLIC

DS000707

• v4-01 • 2022-Jun-08

│ 31

Figure 33:

MUX Register Mode Selection (MODE)

MODE

SENx Connected To

Open

Sensor Driver

Common Mode through 5 k

Ω resistor

No Operation

7.2.10

VAR_SEN Gain Selection (Address 0x24/0x34)

The VAR_SEN Driver Attenuator is used to scale down the VAR_SEN amplitude. The VAR_SEN

amplitude is always related to the Sensor driver amplitude

Figure 34:

VAR_SEN Gain Selection

Current Buffer Gain

Program Parameter

Min

Typ

Max

Unit

SDG=0

V/V

SDG=1

0.931

0.95

0.969

V/V

SDG=2

0.882

0.9

0.918

V/V

SDG=3

0.833

0.85

0.867

V/V

7.2.11

Current Buffer Gain Selection (Address 0x25/0x35)

For the conversion from current to voltage, a trans-impedance amplifier is implemented. The upper

range will be extended by programmable scaling factors.

Figure 35:

Current Buffer Gain Settings

Current Buffer Gain

Program Parameter

Min

Typ

Max

Unit

CBG=0

16.2

19.8

kOhm

CBG=1

8.1

9.9

kOhm

CBG=2

4.05

4.5

4.95

kOhm

AS8579-ASST Datasheet(PDF) 32 Page - OSRAM GmbH

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