AD7985 Analog Devices, AD7985 Datasheet - Page 2

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AD7985

Manufacturer Part Number
AD7985
Description
16-Bit, 2.5 MSPS PulSAR 11 mW ADC in QFN
Manufacturer
Analog Devices
Datasheet

Specifications of AD7985

Resolution (bits)
16bit
# Chan
1
Sample Rate
2.5MSPS
Interface
Ser,SPI
Analog Input Type
SE-Uni
Ain Range
(Vref) p-p,Uni (Vref)
Adc Architecture
SAR
Pkg Type
CSP
AD7985
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Application Diagram ........................................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 12
Theory of Operation ...................................................................... 13
REVISION HISTORY
8/10—Rev. 0 to Rev. A
Change to Table 4, Conversion Time: CNV Rising Edge
to Data Available ............................................................................... 5
9/09—Revision 0: Initial Version
Timing Specifications .................................................................. 5
ESD Caution .................................................................................. 6
Circuit Information .................................................................... 13
Converter Operation .................................................................. 13
Conversion Modes of Operation .............................................. 13
Typical Connection Diagram.................................................... 14
Rev. A | Page 2 of 28
Digital Interface .............................................................................. 17
Applications Information .............................................................. 25
Outline Dimensions ....................................................................... 27
Analog Inputs.............................................................................. 15
Driver Amplifier Choice ........................................................... 15
Voltage Reference Input ............................................................ 16
Power Supply ............................................................................... 16
Data Reading Options ............................................................... 18
CS Mode, 3-Wire Without Busy Indicator ............................. 19
CS Mode, 3-Wire with Busy Indicator .................................... 20
CS Mode, 4-Wire Without Busy Indicator ............................. 21
CS Mode, 4-Wire with Busy Indicator .................................... 22
Chain Mode Without Busy Indicator ...................................... 23
Chain Mode with Busy Indicator ............................................. 24
Layout .......................................................................................... 25
Evaluating AD7985 Performance ............................................. 25
Ordering Guide .......................................................................... 27

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