AD7656-1 Analog Devices, AD7656-1 Datasheet - Page 2

• Manufacturer Part Number: AD7656-1
• Description: 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC
• Manufacturer: Analog Devices

Specifications of AD7656-1

• Resolution (bits): 16bit
• # Chan: 6
• Sample Rate: 250kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: SE-Bip
• Ain Range: 10V p-p,20 V p-p,Bip 10V,Bip 5.0V
• Adc Architecture: SAR
• Pkg Type: QFP

AD7656-1/AD7657-1/AD7658-1
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings.......................................................... 10
Pin Configuration and Function Descriptions........................... 11
Typical Performance Characteristics ........................................... 14
Terminology .................................................................................... 18
REVISION HISTORY
11/10—Rev. B to Rev. C
Added Power Supply Configuration Section .............................. 29
Added Figure 39.............................................................................. 29
6/10—Rev. A to Rev. B
Changes to DC Accuracy Parameter, Table 1 ............................... 3
Changes to DC Accuracy Parameter, Table 2 ............................... 5
Change to DC Accuracy Parameter, Table 3................................. 7
Added %FSR to Terminology Section ......................................... 19
3/09—Rev. 0 to Rev. A
Changes to Features.......................................................................... 1
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 5
Changes to Table 3............................................................................ 7
Changes to Table 4............................................................................ 9
AD7656-1 ...................................................................................... 3
AD7657-1 ...................................................................................... 5
AD7658-1 ...................................................................................... 7
Timing Specifications .................................................................. 9
Thermal Resistance .................................................................... 10
ESD Caution................................................................................ 10
Rev. C | Page 2 of 32
Theory of Operation ...................................................................... 20
Application Hints ........................................................................... 29
Outline Dimensions ....................................................................... 30
Changes to Absolute Maximum Ratings Table .......................... 10
Changes to Pin Functions Description Table ............................. 11
Changes to Figure 9........................................................................ 14
Changes to Converter Details Section......................................... 20
Changes to Internal/External Reference Section ....................... 21
Changes to Interface Options Section ......................................... 22
Changes to Parallel Interface Section .......................................... 22
Changes to Serial Interface (SER/ PAR SEL = 1) Section .......... 25
Changes to Daisy-Chain Mode (DCEN = 1, SER/ PAR SEL = 1)...27
Changes to Layout Section............................................................ 30
Updated Outline Dimension ........................................................ 31
Changes to Ordering Guide .......................................................... 31
7/08—Revision 0: Initial Version
Converter Details ....................................................................... 20
ADC Transfer Function............................................................. 21
Internal/External Reference...................................................... 21
Typical Connection Diagram ................................................... 21
Driving the Analog Inputs ........................................................ 22
Interface Options........................................................................ 22
Software Selection of ADCs...................................................... 24
Changing the Analog Input Range ( H /S SEL = 0)................ 25
Changing the Analog Input Range ( H /S SEL = 1)................ 25
Serial Read Operation................................................................ 25
Daisy-Chain Mode (DCEN = 1, SER/ PAR SEL = 1) ............. 27
Layout .......................................................................................... 29
Power Supply Configuration .................................................... 29
Ordering Guide .......................................................................... 30