AD7265 Analog Devices, AD7265 Datasheet - Page 2

• Manufacturer Part Number: AD7265
• Description: Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7265

• Resolution (bits): 12bit
• # Chan: 12
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7265
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 6
Pin Configurations and Function Descriptions ........................... 7
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 11
Theory of Operation ...................................................................... 13
REVISION HISTORY
11/06—Rev. 0 to Rev. A
Changes to Format .............................................................Universal
Changes to Reference Input/Output Section ................................ 4
Changes to Table 4............................................................................ 7
Changes to Terminology Section.................................................. 11
Changes to Figure 24 and Differential Mode Section................ 15
Changes to Figure 29...................................................................... 16
Changes to AD7265 to ADSP-BF53x Section............................. 24
Updated Outline Dimensions ....................................................... 27
Changes to Ordering Guide .......................................................... 27
Timing Specifications .................................................................. 5
ESD Caution.................................................................................. 6
Circuit Information.................................................................... 13
Converter Operation.................................................................. 13
Analog Input Structure.............................................................. 13
Analog Inputs.............................................................................. 14
Analog Input Selection .............................................................. 17
Output Coding............................................................................ 17
Transfer Functions...................................................................... 18
Rev. A | Page 2 of 28
Modes of Operation ....................................................................... 19
Serial Interface ................................................................................ 22
Microprocessor Interfacing........................................................... 23
Application Hints ........................................................................... 26
Outline Dimensions ....................................................................... 27
4/05—Revision 0: Initial Version
Digital Inputs .............................................................................. 18
V
Normal Mode.............................................................................. 19
Partial Power-Down Mode ....................................................... 19
Full Power-Down Mode ............................................................ 20
Power-Up Times......................................................................... 21
Power vs. Throughput Rate....................................................... 21
AD7265 to ADSP218x ............................................................... 23
AD7265 to ADSP-BF53x ........................................................... 24
AD7265 to TMS320C541 .......................................................... 24
AD7265 to DSP563xx ................................................................ 25
Grounding and Layout .............................................................. 26
PCB Design Guidelines for LFCSP .......................................... 26
Evaluating the AD7265 Performance ...................................... 26
Ordering Guide .......................................................................... 27
DRIVE
............................................................................................ 18