AS1524/AS1525
Datasheet - P i n o u t
4 Pinout
Pin Assignment
Figure 2. Pin Assignments (Top View)
V
DD
1
8 SCLK
AIN1/AIN+ 2
AIN2/AIN- 3
AS1524/
AS1525
7 DOUT
6 CNVST
GND 4
5 REF
Pin Description
Table 2. Pin Description
Pin Number
1
2
3
4
5
Pin Name
VDD
AIN1/AIN+
AIN2/AIN-
GND
REF
Description
Positive Supply Voltage.
+2.7V to +5.25V.
Note:
Bypass with a 0.1µF capacitor to GND.
Analog Input Channel 1 (AS1525) or Positive Analog Input (AS1524)
Analog Input Channel 2 (AS1525) or Negative Analog Input (AS1524)
Ground
External Reference Voltage Input.
Sets the analog voltage range.
Note:
Bypass with a 4.7µF capacitor to GND.
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).
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.
Serial Clock Input.
Clocks out data at DOUT with the MSB first.
6
CNVST
7
DOUT
8
SCLK
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