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AS8510

Datasheet - Contents

Contents

1 General Description ..................................................................................................................................................................

1

2 Key Features.............................................................................................................................................................................

1

3 Applications...............................................................................................................................................................................

1

4 Pin Assignments .......................................................................................................................................................................

4

4.1 Pin Descriptions.................................................................................................................................................................................... 4

5 Absolute Maximum Ratings ......................................................................................................................................................

6

6 Electrical Characteristics...........................................................................................................................................................

7

6.1 Operating Conditions............................................................................................................................................................................ 7

6.2 DC/AC Characteristics for Digital Inputs and Outputs .......................................................................................................................... 7

6.3 Detailed System and Block Specifications ........................................................................................................................................... 9

6.3.1 Electrical System Specifications .................................................................................................................................................. 9

6.4 Current Measurement Ranges (across 100µ

Ω shunt resistor)............................................................................................................ 9

6.4.1 Differential Input Amplifier for Current Channel ......................................................................................................................... 10

6.4.2 Differential Input Amplifier for Voltage Channel......................................................................................................................... 11

6.4.3 Sigma Delta Analog to Digital Converter ................................................................................................................................... 12

6.4.4 Bandgap Reference Voltage...................................................................................................................................................... 12

6.4.5 Internal (Programmable) Current Source for External Temperature Measurement .................................................................. 13

6.4.6 CMREF Circuit (VCM) ............................................................................................................................................................... 13

6.4.7 Internal AVDD Power-on Reset ................................................................................................................................................. 13

6.4.8 Internal DVDD Power-on Reset................................................................................................................................................. 14

6.4.9 Low Speed Oscillator................................................................................................................................................................. 14

6.4.10 High Speed Oscillator.............................................................................................................................................................. 14

6.4.11 External Clock.......................................................................................................................................................................... 14

6.4.12 Internal Temperature Sensor................................................................................................................................................... 15

6.5 System Specifications ........................................................................................................................................................................ 15

7 Detailed Description................................................................................................................................................................

16

7.1 Current Measurement Channel .......................................................................................................................................................... 16

7.2 Voltage/Temperature Measurement Channel ..................................................................................................................................... 16

7.3 Digital Implementation of Measurement Path..................................................................................................................................... 17

7.4 Modes of Operation............................................................................................................................................................................ 17

7.4.1 Normal Mode 1 (NOM1) ............................................................................................................................................................ 19

7.4.2 Normal Mode 2 (NOM2) ............................................................................................................................................................ 19

7.4.3 Standby Mode1 (SBM1) ............................................................................................................................................................ 20

7.4.4 Standby Mode2 (SBM2) ............................................................................................................................................................ 21

7.5 Reference-Voltage.............................................................................................................................................................................. 21

7.6 Oscillators........................................................................................................................................................................................... 21

7.7 Power-On Reset................................................................................................................................................................................. 21

7.8 4-Wire Serial Port Interface ................................................................................................................................................................ 22

7.8.1 SPI Frame.................................................................................................................................................................................. 22

7.8.2 Write Command......................................................................................................................................................................... 23

7.8.3 Read Command......................................................................................................................................................................... 24

7.8.4 Timing........................................................................................................................................................................................ 25

7.8.5 SPI Interface Timing .................................................................................................................................................................. 26