AS3675 datasheet(26/81 Pages) AMSCO

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AS3675

Datasheet - D e ta i l e d D e s c r i p t i o n

8.4.1 High Voltage Current Sinks CURR1, CURR2, CURR6

The high voltage current sinks have a resolution of 8 bits. Additionally an internal protection circuit monitors with a volt-

age divider (max 3µA @ 15V) the voltage on CURR1, CURR2 and CURR6 and increases the current in off state in

case of over voltage.

High Voltage Current Sinks CURR1, CURR2, CURR6 Registers

Table 22. HV Current Sinks Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

IBIT7

Current sink if Bit7 = 1

For V(CURRx) > 0.45V

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

Δm

matching Accuracy

CURR1,CURR2,CURR6

-10

+10

absolute Accuracy

-15

+15

VCURR1,2,6x

Voltage compliance

0.45

Ov_prot_13V

Over voltage

Protection of current

sink CURR1,2,6

At 13V, independent of curr1_prot_on,

curr2_prot_on or curr6_prot_on

3.0

µA

Ov_prot_15V

Over voltage

Protection of current

sink CURR1,2,6

At 15V, step_up_on=1,

curr1_prot_on=1 for CURR1,

curr2_prot_on=1 for CURR2,

curr6_prot_on=1 for CURR6

0.8

4.0

Table 23. Curr1 current

Addr: 09h

Curr1 current

This register controls the High voltage current sink current.

Bit

Bit Name

Default Access

Description

7:0

curr1_current

0R/W

Defines current into current sink curr1

00h

0 mA

01h

0.15 mA

....

FFh

38.25 mA

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