AD7864 Analog Devices, AD7864 Datasheet - Page 2

• Manufacturer Part Number: AD7864
• Description: High Speed, Low Power, 4-channel Simultaneous Sampling, 12-Bit ADC
• Manufacturer: Analog Devices

Specifications of AD7864

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 520kSPS
• Interface: Par
• Analog Input Type: SE-Bip,SE-Uni
• Ain Range: Bip 10V,Bip 2.5V,Bip 5.0V,Uni 2.5V,Uni 5.0V
• Adc Architecture: SAR
• Pkg Type: QFP

AD7864
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Pin Configuration and Function Descriptions ............................. 7
Terminology ...................................................................................... 9
Theory of Operation ...................................................................... 11
Circuit Description ......................................................................... 13
Selecting a Conversion Sequence ................................................. 15
REVISION HISTORY
2/09—Rev. C to Rev. D
Change to t
2/09—Rev. B to Rev. C
Updated Format .................................................................. Universal
Changes to t
Changes to Figure 15 ...................................................................... 20
Changes to AD7864 to MC68HC000 Interface Section ............ 24
Changes to Figure 25 ...................................................................... 24
Updated Outline Dimensions ....................................................... 29
Changes to Ordering Guide .......................................................... 29
Timing Characteristics ................................................................ 5
ESD Caution .................................................................................. 6
Converter Details ........................................................................ 11
Analog Input ............................................................................... 13
Timing and Control ................................................................... 15
Using an External Clock ............................................................ 17
2
5
Parameter, Table 2 ...................................................... 5
Timing Parameter, Table 2....................................... 5
Rev. D | Page 2 of 28
Offset and Full-Scale Adjustment ................................................ 20
Dynamic Specifications ................................................................. 21
Microprocessor Interfacing ........................................................... 24
Outline Dimensions ....................................................................... 27
3/04—Rev. A to Rev. B.
Changes to Specifications and to Footnote 4 ................................. 2
Changes to Timing Characteristics Footnote 1 ............................. 4
Addition to Absolute Maximum Ratings ....................................... 5
Changes to Ordering Guide ............................................................. 5
Changes to Figure 7 ......................................................................... 11
Changes to Figure 11 ...................................................................... 13
Updated Outline Dimensions ....................................................... 19
Added Revision History ................................................................ 20
Updated Publication Code ............................................................ 20
Standby Mode Operation .......................................................... 18
Accessing the Output Data Registers ....................................... 18
Positive Full-Scale Adjust .......................................................... 20
Negative Full-Scale Adjust ......................................................... 20
Signal-to-Noise Ratio (SNR)..................................................... 21
Effective Number of Bits ........................................................... 21
Intermodulation Distortion ...................................................... 21
AC Linearity Plots ...................................................................... 22
Measuring Aperture Jitter .......................................................... 22
AD7864 to ADSP-2100/ADSP-2101/ADSP-2102 Interface . 24
AD7864 to TMS320C5x Interface ............................................ 24
AD7864 to MC68HC000 Interface .......................................... 24
Vector Motor Control ................................................................ 25
Multiple AD7864s in A System ................................................. 26
Ordering Guide .......................................................................... 27