AMC7834 Datasheet, PDF (2/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
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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 kΩ pullup
resistor to the IOV_DD 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: AV_DD alarm threshold to Electrical Characteristics—General Specifications .......................................................... 12
• Changed the I_IOVDD (Power-Mode 10) TYP value From: 1 µA To 1.75 µA in Electrical Characteristics—General
Specifications ....................................................................................................................................................................... 13
• Changed the I_IOVDD (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
AV_SS.".................................................................................................................................................................................... 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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