XR18910 datasheet(6/19 Pages) EXAR | 8:1 Sensor Interface Analog Front End

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XR18910 датащи(PDF) 6 Page - Exar Corporation

номер детали	XR18910

подробное описание детали	8:1 Sensor Interface Analog Front End

PDF	19 Pages

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производитель	EXAR [Exar Corporation]

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REV1A

Electrical Characteristics (Continued)

Table 1. Register List

Reg No.

Name

Function

R/

W/

C

Byte of

Parameter

Parameter

Default

Code

Power-up

Condition

Remark

Hex

Dec

0x00

0

NOP

No operation

C

0

N/A

Does not execute a function. NOP is used to

test successful I2C communication

Reset

0x01

1

SW_RESET

Software reset

C

0

N/A

Resets all registers to default values

Read ID

0x02

2

DEVICE_ID

Read Device ID

R

2

[15:0]: report “8910” in

BCD

0x8910

Instructs the XR18910 to report its device ID

8910 in binary form (1000 1001 0001 0000)

0x03

3

VERSION_ID

Read HW & SW

version numbers

R

2

[15:12]: reserved

[11:8]: Hardware version #

[7:0]: Software version #

N/A

Initial H/W version number is ‘0’;

Initial S/W version number is ‘01’.

Sleep in/out

0x04

4

SLEEP_OUT_

REG

Normal operating

mode, system active

C

0

N/A

Active

Puts the XR18910 into active mode. (wake up)

0x05

5

SLEEP_IN_

REG

Sleep Mode

C

0

N/A

Active

Puts the analog portion of the XR18910 into

sleep mode.

During sleep mode, the only I2C command

that can be received/processed is the

SLEEP_OUT command (0x04). All other

register addresses will be ignored.

Basic Config

0x06

6

Gain

Gain select

R/W

1

[2:0]: Gain select

0x00

Gain = 2

Eight gain settings are selectable (from 2V/V

to 760V/V), refer to the Gain Register Table

for more information.

0x07

7

LDO

LDO Settings

R/W

1

[0]:LDO 3V, 2.65V

[1]:LDO disable

0x00

LDO = 3V

Bit 0 controls the LDO voltage (0:3V;1:2.65V).

Bit 1 (Sleep Mode only). Bit 1 controls whether

the LDO shuts down or stays on during Sleep

Mode. (0: Enable; 1: Disable). When the

XR18910 is active, the LDO is always on.

0x08

8

LDO Current

Sense Select

LDO Current Sense

C

0

N/A

Off

When on, the LDO current is sensed and a

proportional voltage is present at the output of

the XR18910.

Current Sense Mode remains active until an input

select command is received by the XR18910.

Channel Switch (Input MUX Select)

0x10

16

Select_Input_1

Select Channel 1

C

0

N/A

Channel 1

is selected

Select +IN1, -IN1; Channel 1

0x12

18

Select_Input_2

Select Channel 2

C

0

Select +IN2, -IN2; Channel 2

0x14

20

Select_Input_3

Select Channel 3

C

0

Select +IN3, -IN3; Channel 3

0x15

21

Select_Input_4

Select Channel 4

C

0

Select +IN4, -IN4; Channel 4

0x18

24

Select_Input_5

Select Channel 5

C

0

Select +IN5, -IN5; Channel 5

0x1A

26

Select_Input_6

Select Channel 6

C

0

Select +IN6, -IN6; Channel 6

0x1C

28

Select_Input_7

Select Channel 7

C

0

Select +IN7, -IN7; Channel 7

0x1E

30

Select_Input_8

Select Channel 8

C

0

Select +IN8, -IN8; Channel 8

Offset DAC Config

0x20

32

DAC1

Configures DAC offset

applied to Channel 1

R/W

2

[10]: DAC Sign

[9:0]: DAC Range

0x00

0mV

offset

Bit 10 controls the sign of the DAC offset

voltage. Bits 9 thru 0 control the value of

the DAC offset voltage.

[10]: DAC Sign 0 = positive; 1 = negative

0x22

34

DAC2

Configures DAC offset

applied to Channel 2

R/W

2

0x24

36

DAC3

Configures DAC offset

applied to Channel 3

R/W

2

0x25

37

DAC4

Configures DAC offset

applied to Channel 4

R/W

2

0x28

40

DAC5

Configures DAC offset

applied to Channel 5

R/W

2

0x2A

42

DAC6

Configures DAC offset

applied to Channel 6

R/W

2

0x2C

44

DAC7

Configures DAC offset

applied to Channel 7

R/W

2

0x2E

46

DAC8

Configures DAC offset

applied to Channel 8

R/W

2

NOTE:

Register numbers not listed above have no function.

XR

18910

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