AD7946 Analog Devices, AD7946 Datasheet - Page 2

• Manufacturer Part Number: AD7946
• Manufacturer: Analog Devices

Specifications of AD7946

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

AD7946
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Application Diagram........................................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 6
Pin Configurations and Function Descriptions ........................... 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 11
Theory of Operation ...................................................................... 12
REVISION HISTORY
12/07—Rev. 0 to Rev. A
QFN Package Available......................................................Universal
Changes to Table 1............................................................................ 1
Changes to Table 5............................................................................ 6
Changes to Ordering Guide .......................................................... 24
7/05—Revision 0: Initial Version
Timing Specifications .................................................................. 5
ESD Caution.................................................................................. 6
Circuit Information.................................................................... 12
Converter Operation.................................................................. 12
Typical Connection Diagram ................................................... 13
Analog Input ............................................................................... 13
Driver Amplifier Choice............................................................ 14
Rev. A | Page 2 of 24
Application Guidelines .................................................................. 23
Outline Dimensions ....................................................................... 24
Voltage Reference Input ............................................................ 14
Power Supply............................................................................... 15
Supplying the ADC from the Reference.................................. 15
Single-Supply Application......................................................... 15
Digital Interface.......................................................................... 16
CS MODE 3-Wire, No BUSY Indicator .................................. 17
CS Mode 3-Wire with BUSY Indicator ................................... 18
CS Mode 4-Wire, No BUSY Indicator..................................... 19
CS Mode 4-Wire with BUSY Indicator ................................... 20
Chain Mode, No BUSY Indicator ............................................ 21
Chain Mode with BUSY Indicator........................................... 22
Layout .......................................................................................... 23
Evaluating the AD7946’s Performance.................................... 23
Ordering Guide .......................................................................... 24