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AS1538

austriamicrosystems AG
Part Number AS1538
Manufacturer austriamicrosystems AG
Description 12-Bit I2C Analog-to-Digital Converter
Published Mar 14, 2010
Detailed Description www.DataSheet4U.com AS1538/AS1540 8 / 4 - C h a n n e l , 1 2 - B i t I ² C A n a l o g - t o - D i g i ta l C o n v e ...
Datasheet PDF File AS1538 PDF File

AS1538
AS1538

Overview
www.
DataSheet4U.
com AS1538/AS1540 8 / 4 - C h a n n e l , 1 2 - B i t I ² C A n a l o g - t o - D i g i ta l C o n v e r t e r D a ta S he e t 1 General Description The AS1538/AS1540 are single-supply, low-power, 12bit data acquisition devices featuring a serial I²C interface and an 8-channel (AS1538) or 4-channel (AS1540) multiplexer.
The analog-to-digital (A/D) converters features a sample-and-hold amplifier an internal asynchronous clock and an internal reference.
The combination of an I C serial, 2-wire interface and micropower consumption makes the AS1538 and AS1540 ideal for applications requiring the A/D converter 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 16pin package.
2 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 I C Interface at 3.
4MHz <1.
5µA Full Shutdown Current TSSOP-16 or TQFN 4x4 16-pin Package 2 3 Applications The device is ideal for voltage-supply monitoring, isolated data acquisition, transducer interfaces, batteryoperated systems, remote data acquisition or any other analog-to-digital conversion application.
Figure 1.
Block Diagram CH0 CH1 CH2 CH3 CH4 CH5 AS1538 only CH6 CH7 COM 8-Channel MUX Sample/ Hold Amp Successive Approximation Register Serial Interface SDA SCL A0 A1 AS1538/AS1540 CDAC Comparator REFIN/OUT Buffer Internal 2.
5V Reference GND www.
austriamicrosystems.
com Revision 1.
03 1 - 20 AS1538/AS1540 Data Sheet - P i n o u t www.
DataSheet4U.
com 4 Pinout Pin Assignments Figure 2.
Pin Assignments (Top View) +VDD SDA CH0 N/C CH0 1 CH1 2 CH2 3 CH3 4 CH4 5 CH5 6 CH6 7 CH7 8 16 +VDD 15 SDA 14 SCL CH1 CH2 CH3 N/C 1 2 16 15 14 13 12 SCL 11 A1 AS1538 13 A1 12 A0 11 COM 10 REFIN/OUT 9 GND AS1540 3 4 5 N/C 6 GND 7 REFIN/OUT 8 COM 10 A0 9 N/C Pin Descriptions Tab...


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