AD7870SQ Analog Devices Inc, AD7870SQ Datasheet - Page 2

• Manufacturer Part Number: AD7870SQ
• Description: IC ADC 12BIT SAMPLING 3V 24-CDIP
• Manufacturer: Analog Devices Inc

Specifications of AD7870SQ

• Rohs Status: RoHS non-compliant
• Number Of Bits: 12
• Sampling Rate (per Second): 100k
• Data Interface: Serial, Parallel
• Number Of Converters: 1
• Power Dissipation (max): 95mW
• Voltage Supply Source: Dual ±
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 24-CDIP (0.300", 7.62mm)

AD7870/AD7875/AD7876
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 7
Pin Configurations and Function Descriptions ........................... 8
Load Circuits ................................................................................... 10
Converter Details ............................................................................ 11
REVISION HISTORY
2/09—Rev. B to Rev. C
Updated Format .................................................................. Universal
Reorganized Layout ............................................................ Universal
Deleted S Version ................................................................ Universal
Changes to Internal Clock Parameter, Table 1 and
Added Endnote to Table 1 ............................................................... 4
Changes to Internal Clock Parameter, Table 2 .............................. 5
Changes to Mode 1 Interface Section .......................................... 14
Deleted Data Acquisition Board and Interface Connections
Sections and Figure 26 ................................................................... 15
Deleted Figure 27 and Power Supply Connections, Shorting
Plug Options and Components List Sections ............................. 16
Deleted Figure 28 and Figure 29 ................................................... 17
Deleted Figure 30 and Figure 31 ................................................... 18
Updated Outline Dimensions ....................................................... 23
Changes to Ordering Guide .......................................................... 25
AD7870 Specifications ................................................................. 3
AD7875/AD7876 Specifications ................................................. 4
Timing Characteristics ................................................................ 6
ESD Caution .................................................................................. 7
Internal Reference ...................................................................... 11
Track-and-Hold Amplifier ........................................................ 11
Analog Input ............................................................................... 11
Offset And Full-Scale Adjustment—AD7870 ........................ 12
Rev. C | Page 2 of 28
Timing and Control ....................................................................... 14
Microprocessor Interface ............................................................... 19
Applications Information .............................................................. 22
Outline Dimensions ....................................................................... 23
Offset And Full-Scale Adjustment—AD7876 ........................ 13
Offset And Full-Scale Adjustment—AD7875 ........................ 13
Data Output Formats ................................................................. 14
Mode 1 Interface ......................................................................... 14
Mode 2 Interface ......................................................................... 15
Dynamic Specifications ............................................................. 16
Parallel Read Interfacing ........................................................... 19
Two-Byte Read Interfacing ....................................................... 19
Serial Interfacing ........................................................................ 20
Standalone Operation ................................................................ 21
Layout Hints ................................................................................ 22
Noise ............................................................................................ 22
Ordering Guide .......................................................................... 25