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AMC7834IRTQT Datasheet(PDF) 2 Page - Texas Instruments |
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AMC7834IRTQT Datasheet(HTML) 2 Page - Texas Instruments |
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2 / 93 page  2 AMC7834 SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016 www.ti.com Product Folder Links: AMC7834 Submit Documentation Feedback Copyright © 2014–2016, Texas Instruments Incorporated Table of Contents 1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 4 6 Specifications......................................................... 7 6.1 Absolute Maximum Ratings ...................................... 7 6.2 ESD Ratings.............................................................. 7 6.3 Recommended Operating Conditions ....................... 8 6.4 Thermal Information .................................................. 8 6.5 Electrical Characteristics—DAC Specifications ........ 9 6.6 Electrical Characteristics—ADC, Current and Temperature Sensor Specifications......................... 11 6.7 Electrical Characteristics—General Specifications . 12 6.8 Serial Interface Timing Requirements..................... 13 6.9 Switching Characteristics—DAC Specifications...... 14 6.10 Switching Characteristics—ADC, Current and Temperature Sensor Specifications......................... 14 6.11 Switching Characteristics—General Specifications ........................................................... 15 6.12 Typical Characteristics .......................................... 16 7 Detailed Description ............................................ 24 7.1 Overview ................................................................. 24 7.2 Functional Block Diagram ....................................... 25 7.3 Feature Description................................................. 26 7.4 Device Functional Modes ....................................... 47 7.5 Programming........................................................... 51 7.6 Register Maps ......................................................... 52 8 Application and Implementation ........................ 77 8.1 Application Information............................................ 77 8.2 Typical Application ................................................. 78 8.3 Initialization Set Up ................................................. 82 9 Power Supply Recommendations ...................... 82 10 Layout................................................................... 82 10.1 Layout Guidelines ................................................. 82 10.2 Layout Example .................................................... 83 11 Device and Documentation Support ................. 85 11.1 Documentation Support ........................................ 85 11.2 Community Resources.......................................... 85 11.3 Trademarks ........................................................... 85 11.4 Electrostatic Discharge Caution ............................ 85 11.5 Glossary ................................................................ 85 12 Mechanical, Packaging, and Orderable Information ........................................................... 85 4 Revision History Changes from Revision A (April 2015) to Revision B Page • deleted text from the Description of pin 1 in the Pin Functions table " If unused the pin requires a 10 k Ω pullup resistor to the IOVDD pin." ....................................................................................................................................................... 5 • Added: Bipolar DACs in AVSS clamp mode To the Clamp Output Mode section of Electrical Characteristics—DAC Specifications ....................................................................................................................................................................... 10 • Deleted text from the Accuracy Test Conditions: "32 Samples Average" in Electrical Characteristics—ADC, Current and Temperature Sensor Specifications ............................................................................................................................. 11 • Added: AVDD alarm threshold to Electrical Characteristics—General Specifications .......................................................... 12 • Changed the IIOVDD (Power-Mode 10) TYP value From: 1 µA To 1.75 µA in Electrical Characteristics—General Specifications ....................................................................................................................................................................... 13 • Changed the IIOVDD (Power-Mode 00) TYP value From: 0.2 µA To 1.75 µA in Electrical Characteristics—General Specifications........................................................................................................................................................................ 13 • Added Figure 29 .................................................................................................................................................................. 19 • Changed Figure 45 ............................................................................................................................................................... 27 • Added text to the itemized list in DAC Clamp Operation: "If the output buffer is inactive the clamp voltage is fixed to AVSS.".................................................................................................................................................................................... 29 • Added text to the end of DAC Clamp Operation: "Additionally, in the unique case..."......................................................... 29 • Changed text in paragraph 1 of ADC Sequencing From: "The AMC7834 supports autonomous ADC conversion" To: The AMC7834 supports autonomous and direct-mode conversions..." ............................................................................... 31 • Change the paragraph: "Once the conversion cycle starts..." in ADC Sequencing ............................................................. 31 • Deleted text from paragraph 3 of ADC Sequencing: "The first conversion sequence is reserved for calibration and the corresponding ADC results should be ignored."............................................................................................................. 31 • Added text to the last paragraph of ADC Sequencing: "In direct-mode conversion the DAV/ADC_RDY pin ... for each channel group. "........................................................................................................................................................... 33 • Added text to paragraph 3 of Drain Switch Control: The PA_ON signal state is also triggered by the AVDD monitoring circuit................................................................................................................................................................... 39 |
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