AS1538 반도체 회로 부품 판매점
12-Bit I2C Analog-to-Digital Converter
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 austriamicrosystems AG |
www.DataSheet4U.com
AS1538/AS1540
8/4-Channel, 12-Bit I²C Analog-to-Digital Converter
Data Sheet
1 General Description
The AS1538/AS1540 are single-supply, low-power, 12-
bit data acquisition devices featuring a serial I²C inter-
face and an 8-channel (AS1538) or 4-channel (AS1540)
multiplexer.
The analog-to-digital (A/D) converters features a sam-
ple-and-hold amplifier an internal asynchronous clock
and an internal reference.
The combination of an I2C serial, 2-wire interface and
micropower consumption makes the AS1538 and
AS1540 ideal for applications requiring the A/D con-
verter to be close to the input source in remote locations
and for applications requiring isolation.
The device is available in a TSSOP-16 or TQFN 4x4 16-
pin package.
2 Key Features
! Single Supply: 2.7 to 5.25V
! 8-Channel Multiplexer (AS1538)
! 4-Channel Multiplexer (AS1540)
! Sampling Rate: 50kSPS
! No Missing Codes
! Internal Reference: 2.5V
! High Speed I2C Interface at 3.4MHz
! <1.5µA Full Shutdown Current
! TSSOP-16 or TQFN 4x4 16-pin Package
3 Applications
The device is ideal for voltage-supply monitoring, iso-
lated data acquisition, transducer interfaces, battery-
operated systems, remote data acquisition or any other
analog-to-digital conversion application.
Figure 1. Block Diagram
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
REFIN/OUT
8-Channel
MUX
Sample/
Hold
Amp
Successive Approximation Register
AS1538/AS1540
CDAC
Comparator
Serial
Interface
SDA
SCL
A0
A1
Buffer
Internal
2.5V
Reference
GND
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Revision 1.03
1 - 20
AS1538/AS1540
Data Sheet - Pinout
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
AS1538
16 +VDD
15 SDA
14 SCL
13 A1
12 A0
11 COM
10 REFIN/OUT
9 GND
www.DataSheet4U.com
CH1 1
16 15 14 13
12 SCL
CH2 2
CH3 3
AS1540
11 A1
10 A0
N/C 4
5678
9 N/C
Pin Descriptions
Table 1. Pin Descriptions
AS1538
-
1:8
9
10
11
12
13
14
15
16
-
AS1540
1:3,16
-
6
7
8
10
11
12
13
15
4, 5, 9, 14
Pin Name
CH0:CH3
CH0:CH7
GND
REFIN/OUT
COM
A0
A1
SCL
SDA
+VDD
NC
Description
Analog Input Channels 0 to 3
Analog Input Channels 0 to 7
Analog Ground
Internal Reference/External Reference Input
Analog Input Channel Common
Slave Address Bit 0
Slave Address Bit 1
Serial Clock
Serial Data
Power Supply Input. 2.7 to 5.25V.
Not Connected
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Revision 1.03
2 - 20
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제조업체: austriamicrosystems AG
( am )
AS1538 converter
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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전력반도체 문의 : 010-3582-2743
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