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Revision 1.02

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AS1524/AS1525

Datasheet - P i n o u t

4 Pinout

Pin Assignment

Figure 2. Pin Assignments (Top View)

Pin Description

Table 2. Pin Description

Pin Number

Pin Name

Description

1

VDD

Positive Supply Voltage. +2.7V to +5.25V.

Note: Bypass with a 0.1µF capacitor to GND.

2AIN1/AIN+

Analog Input Channel 1 (AS1525) or Positive Analog Input (AS1524)

3AIN2/AIN-

Analog Input Channel 2 (AS1525) or Negative Analog Input (AS1524)

4GND

Ground

5REF

External Reference Voltage Input. Sets the analog voltage range.

Note: Bypass with a 4.7µF capacitor to GND.

6

CNVST

Conversion Start. A rising edge powers up the device and puts the track/

hold circuitry in track mode. At the falling edge of this pin, the device enters

hold mode and begins a conversion.

Note: This pin also selects the input channel (AS1525) or input polarity

(AS1524).

7DOUT

Serial Data Output. This pin transitions the falling edge of SCLK and goes

low at the start of a conversion and delivers the MSB at the completion of a

conversion.

Note: This pin goes high impedance once data has been fully clocked out.

8SCLK

Serial Clock Input. Clocks out data at DOUT with the MSB first.

AS1524/

AS1525

4

GND

3

AIN2/AIN-

2

AIN1/AIN+

1

5 REF

7DOUT

8 SCLK

6CNVST