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Revision 0.96

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AS1530, AS1531

Data Sheet

7 Pinout

Pin Assignments

Figure 19. Pin Assignments (Top View)

Pin Descriptions

Table 6. Pin Descriptions

Pin Number

Pin Name

Description

1:8

CH0:CH7

Analog Sampling Inputs.

These eight pins serve as analog sampling inputs.

9COM

Common Analog Inputs

. Tie this pin to ground in single-ended mode.

10

Positive Supply Voltage

11

REF

Reference-Buffer Output/A/DC Reference Input

. This pin serves as the reference

voltage for analog-to-digital conversions. In internal reference mode, the reference

buffer provides a +2.50V nominal output, externally adjustable at pin REFADJ. In

12

REFADJ

Reference-Buffer Amplifier Input

. To disable the reference-buffer amplifier, tie this

13

GND

Analog and Digital Ground

14

DOUT

Serial Data Output

. Data is clocked out at the rising edge of pin SCLK. DOUT is high

impedance when CSN is high.

15

SSTRB

Serial Strobe Output

. SSTRB pulses high for one clock period before the MSB is

clocked out. SSTRB is high impedance when CSN is high.

16

DIN

Serial Data Input

. Data is clocked in at the rising edge of SCLK.

17

CSN

Active-Low Chip Select

. Data will not be clocked into pin DIN unless CSN is low.

When CSN is high, pins DOUT and SSTRB are high impedance.

18

SCLK

Serial Clock Input

. This pin clocks data into and out of the serial interface, and is used

to set the conversion speed.

Note:

The duty cycle must be between 40 and 60%.

19

Positive Supply Voltage

20

Positive Supply Voltage

AS1530/

AS1531

1

CH0

2

CH1

3

CH2

4

CH3

5

CH4

6

CH5

7

CH6

8

CH7

9

COM

10

18 SCLK

17 CSN

16 DIN

15 SSTRB

14 DOUT

13 GND

12 REFADJ

11 REF