AS3689 datasheet(35/72 Pages) AMSOSRAM

35 / 72 page

AS3689

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (mlg, ptr)

Revision 1.0.2 / 20070115

33 - 70

7.4.4 General Purpose Current Sinks CURR4x, CURR5x

These low voltage current sinks have a resolution of 8 bits and can sink up to 40mA.

Table 15 – CURR4x, CURR5x Sinks Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Note

IBIT7

Current sink if Bit7 = 1

19.2

IBIT6

Current sink if Bit6 = 1

9.6

IBIT5

Current sink if Bit5 = 1

4.8

IBIT4

Current sink if Bit4 = 1

2.4

IBIT3

Current sink if Bit3 = 1

1.2

IBIT2

Current sink if Bit2 = 1

0.6

IBIT1

Current sink if Bit1 = 1

0.3

IBIT0

Current sink if Bit0 = 1

0.15

For V(CURRx) > 0.2V

∆m

matching Accuracy

-10

+10

CURR1,CURR2

∆

absolute Accuracy

-15

+15

Curr1 –

Curr2

Voltage compliance

0.2

VBAT

7.4.4.1 General Purpose Current Sinks CURR4x, CURR5x Registers

Addr: 04h

curr4 control

This register selects the mode of the current sinks CURR41, CURR42, CURR43

Bit

Bit Name

Default

Access

Description

1:0

curr41_mode

R/W

Select the mode of the current sink CURR41

00b = off

01b = on

10b = PWM controlled

11b = LED pattern controlled

3:2

curr42_mode

R/W

Select the mode of the current sink CURR42

00b = off

01b = on

10b = PWM controlled

11b = LED pattern controlled

5:4

curr43_mode

R/W

Select the mode of the current sink CURR43

00b = off

01b = on

10b = PWM controlled

11b = LED pattern controlled

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