AS7000 datasheet(12/92 Pages) AMSCO

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ams Datasheet

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[v1-12] 2018-Feb-26

AS7000 − Detailed Description

LED-Driver

The four LED-driver outputs can be controlled manually or by

the built in sequencer. See Optical Front End Operating Modes

Figure 10:

LED Drivers

Note(s):

1. Dual Green LED Configuration.

Figure 11:

Operating Characteristics of Each LED Current Sink, VDD=3V, TAMB=25°C (unless otherwise noted)

Note(s):

1. Not production tested. Only guaranteed by lab characterization.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

ILED1/2/3/4

LED output current range

imax1/2/3/4 = 00

imax1/2/3/4 = 01

imax1/2/3/4 = 10

100

Tolerance

25mA range

imax1/2/3/4 = 00

-5

50mA range

imax1/2/3/4 = 01

-10

100mA range (1)

imax1/2/3/4 = 10

-10

V_Dmin

Output voltage

compliance

Voltage compliance of current

sinks D1,D2,D3,D4

0.28

V_Dmax

Output voltage maximum

Pins VD1, VD2, VD3 and VD4

5.5

Sequencer

VD1

VD2

max.

compliance

SET

CLR

write ‘1’ to register

ledX_supply_low

ledX_supply

_low

imaxX (set currX range)

currX

ledX_en

man_mode

man_sw_ledX

ledX_mode

VD3

VD4

X=1

X=2

X=3

X=4

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