CS3302

14

3.

PIN DESCRIPTION

Pin Name

Pin #

I/O

Pin Description

VA+

1

I

Positive analog supply voltage.

VA-

4

I

Negative analog supply voltage.

VD

16

I

Positive digital supply voltage.

DGND

15

I

Digital ground.

INA+, INA-

5, 6

I

Channel A differential analog inputs. Selected via MUX pins.

INB+, INB-

8, 7

I

Channel B differential analog inputs. Selected via MUX pins.

GUARD

13

O

Guard voltage output.

OUTR+, OUTR-

11, 2

O

Rough charge differential analog outputs.

OUTF+, OUTF-

10, 3

O

Fine charge differential analog outputs.

GAIN0, GAIN1,

GAIN2

22, 21,

20

I

Gain range select. See Gain Selection table in Digital Characteristics section.

LPWR

18

I

Low power mode enable. Active high.

PWDN

19

I

Power down mode enable. Active high.

MUX0, MUX1

24, 23

I

Analog input select. See Input Selection table in Digital Characteristics section.

TEST0

12

I

Test mode select, factory use only. Connect to VA- during normal operation.

TEST1, TEST2

17, 14

I

Test mode select, factory use only. Connect to DGND during normal operation.

TESTOUT

9O

Test mode output, factory use only. Connect to VA- during normal operation.

Table 2. Pin Descriptions

1

2

3

4

5

6

7

817

18

19

20

21

22

23

24

9

10

11

12

13

14

15

16

Positive Analog Power Supply

VA+

Negative Analog Rough Output

OUTR-

Negative Analog Fine Output

OUTF-

Negative Analog Power Supply

VA-

Non-Inverting Input A

INA+

Inverting Input A

INA-

Inverting Input B

INB-

Non-Inverting Input B

INB+

Test Mode Output

TESTOUT

Positive Analog Fine Output

OUTF+

Positive Analog Rough Output

OUTR+

Test Mode Select

TEST0

MUX0

Input Mux Select

MUX1

Input Mux Select

GAIN0

Gain Range Select

GAIN1

Gain Range Select

GAIN2

Gain Range Select

PWDN

Power Down Mode Enable

LPWR

Low Power Mode Enable

TEST1

Test Mode Select

VD

Positive Digital Power Supply

DGND

Digital Ground

TEST2

Test Mode Select

GUARD

Guard Voltage Output

Figure 5. CS3302 Pin Assignments