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AS1531 Fiches technique(PDF) 3 Page - ams AG

No de pièce AS1531
Description  12-Bit, Single-Supply, Low-Power, 400/300ksps, 8-Channel A/D Converters
PDF  29 Pages
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Fabricant  AMSCO [ams AG]
Site Internet  http://www.ams.com
Logo AMSCO - ams AG

AS1531 Fiches technique(HTML) 3 Page - ams AG

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Revision 1.02
3 - 29
AS1530/AS1531
Data Sheet - Pi nout
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
Pin Descriptions
Table 1. 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
VDD3
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
external reference mode, disable the internal buffer by pulling pin REFADJ to VDD1.
12
REFADJ
Reference-Buffer Amplifier Input. To disable the reference-buffer amplifier, tie this
pin to VDD1.
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
VDD2
Positive Supply Voltage
20
VDD1
Positive Supply Voltage
AS1530/
AS1531
1
CH0
2
CH1
3
CH2
4
CH3
5
CH4
6
CH5
7
CH6
8
CH7
9
COM
10
VDD3
20 VDD1
19 VDD2
18 SCLK
17 CSN
16 DIN
15 SSTRB
14 DOUT
13 GND
12 REFADJ
11 REF



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