as1540-btst austriamicrosystems, as1540-btst Datasheet
as1540-btst
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as1540-btst Summary of contents
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... ² 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 ...
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... Internal Reference/External Reference Input IN/OUT Analog Input Channel Common COM Slave Address Bit 0 A0 Slave Address Bit 1 A1 Serial Clock SCL Serial Data SDA Power Supply Input. 2.7 to 5.25V Not Connected NC Revision 1. SCL AS1540 Description ...
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... AS1538/AS1540 Data Sheet - Absolute Maximum Ratings Stresses beyond those listed in Table 2 and functional operation of the device at these or any other conditions beyond those indicated in istics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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... AS1538/AS1540 Data Sheet - Electrical Characteristics Electrical Characteristics +V = +2.7 to +5.25V +2.5V external, SCL = 3.4MHz REF Table 3. Electrical Characteristics Symbol Parameter Analog Input Fullscale Input Span Absolute Input Range Capacitance ...
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... AS1538/AS1540 Data Sheet - Table 3. Electrical Characteristics Symbol Parameter CMOS Digital I/O V Input High Logic Level IH V Input Low Logic Level IL V Output Low Logic Level OL I Input High Leakage Current ...
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... AS1538/AS1540 Data Sheet - Table 4. Timing Characteristics Symbol Parameter 1 SCL Fall Time T FALLSCLK 1 SDA Fall Time T RISESDA 1 SDA Fall Time T FALLSDA STOP Condition Setup Time T SETUPSTOP 1. Guaranteed by design and characterized on sample base. ...
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... AS1538/AS1540 Data Sheet - Typical Operating Characteristics V = 3.6V 2.5V (internal REF SCL Figure 4. DNL vs. Digital Output Code, Int. Reference 1 f SAMPLE 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0 1024 2048 3072 Digital Output Code Figure 6 ...
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... AS1538/AS1540 Data Sheet - Figure 10. Offset Error vs. Supply Voltage 2.7 3.2 3.7 4.2 Supply Voltage (V) Figure 12. Gain Error vs. Temperature -45 -30 - Temperature (°C) Figure 14 ...
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... AS1538/AS1540 Data Sheet - Figure 16. Supply Current vs. Supply Voltage, PD=00 300 250 200 150 100 50 0 2.7 3.2 3.7 4.2 Supply Voltage (V) Figure 18. Supply Current vs. Supply Voltage, PD=11 1000 800 600 400 200 0 2 ...
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... The AS1538/AS1540 successive approximation register (SAR) A/D converter architecture is based on capacitive redistribution which inherently includes a sample-and- hold function. The AS1538/AS1540 core is controlled by an internally generated free-running clock. When the device is not perform- ing conversions or being addressed, the A/D converter-core and internal clock are powered off. ...
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... Data Sheet - Reference Voltage The AS1538/AS1540 can operate with an internal 2.5V reference or an external reference +5V supply is used, an external +5V reference is required in order to provide full dynamic range for reference can be as low as 1V. When using a +2.7V supply, the internal +2.5V reference will provide full dynamic range for ...
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... Following the START condition, the AS1538 monitors the SDA bus, checking the device type identifier being transmit- ted. Upon receiving the 10010 code, the appropriate device select bits, and the R/W bit, the slave device outputs an acknowledge signal on the SDA line. Command Byte The AS1538/AS1540 operation, including powerdown by a command byte (see Figure 26). ...
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... SD: Single-Ended/Differential Inputs 0: Differential Inputs 1: Single-Ended Inputs C2, C1, C0: Channel Selections PD1, PD0: Power-Down Selection X: Unused Powerdown Selection Powerdown modes for the AS1538/AS1540 are selected by setting bits PD0 and PD1 of a command byte mand Byte on page 12). Table 5. Powerdown Mode Bit Settings PD1 PD0 0 0 Powerdown between A/D converter conversions ...
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... Data Sheet - Application Information Initiating a Conversion After the AS1538/AS1540 has been write-addressed by the bus master, the A/D converter circuitry is powered on, and conversions will begin when a command byte bit C0 is valid, the AS1538/AS1540 will return an ACK. ...
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... Data Sheet - Reading with Internal Reference On/Off The internal reference defaults to off when the AS1538/AS1540 power is on. If the reference (internal or external) is continuously turned on and off, a proper amount of settling time must be added before a normal conversion cycle can be started. The exact amount of settling time needed varies depending on the reference capacitor. For example for a reference capacitor of 4.7µ ...
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... In order to achieve 12-bit accuracy conversion when using the internal reference, the internal reference set- tling time must be considered. If bit PD1 has been set to logic 0 while using the AS1538/AS1540, then the settling time must be reconsidered after PD1 is set to logic 1 (i.e., whenever the internal reference is turned on after it has been turned off, the set- tling time must be long enough to get 12-bit accuracy conversion) ...
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... AS1538/AS1540 Data Sheet - Package Drawings and Markings Figure 30. TSSOP-16 Package Notes: 1. All dimensions are in millimeters; angles in degrees. 2. Dimensioning and tolerancing per ASME Y14.5M – 1994. 3. Dimension D does not include mold flash, protrusions, or gate burrs ...
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... AS1538/AS1540 Data Sheet - Figure 31. TQFN 4x4 16-pin Package Symbol Min Typ A 0.70 0.75 A1 0.00 0.02 L 0.45 0.55 L1 0.03 K 0.20 aaa 0.10 bbb 0.10 ccc 0.10 ddd 0.05 Notes: 1. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters, angle is in degrees. ...
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... The device is available as the standard products shown in Table 7. Ordering Information Model Marking AS1538-BTST AS1538 8-Channel, 12-Bit I²C Analog-to-Digital Converter AS1538-BTSU AS1538 8-Channel, 12-Bit I²C Analog-to-Digital Converter AS1540-BTST AS1540 4-Channel, 12-Bit I²C Analog-to-Digital Converter www.austriamicrosystems.com Table 7. Description Delivery Form Tape and Reel Tape and Reel Revision 1 ...
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... AS1538/AS1540 Data Sheet Copyrights Copyright © 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, trans- lated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. ...