AD7940 Analog Devices, AD7940 Datasheet - Page 2

• Manufacturer Part Number: AD7940
• Description: 3 mW, 100 kSPS, 14-Bit ADC in 6-Lead SOT-23
• Manufacturer: Analog Devices

Specifications of AD7940

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 100kSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOP,SOT

TABLE OF CONTENTS
Table of Contents .............................................................................. 2
Specifications ..................................................................................... 3
Timing Specifications ....................................................................... 5
Absolute Maximum Ratings ............................................................ 6
Pin Configurations and Function Descriptions ........................... 7
Terminology ...................................................................................... 8
Typical Performance Characteristics ............................................. 9
Circuit Information ........................................................................ 11
ADC Transfer Function ................................................................. 12
Modes of Operation ....................................................................... 13
REVISION HISTORY
8/11—Rev. 0 to Rev. A
Updated Outline Dimensions ....................................................... 20
Changes to Ordering Guide .......................................................... 20
7/04—Revision 0: Initial Version
ESD Caution .................................................................................. 6
Converter Operation .................................................................. 11
Analog Input ............................................................................... 11
Typical Connection Diagram ................................................... 12
Power vs. Throughput Rate ........................................................... 15
Serial Interface ................................................................................ 16
Microprocessor Interfacing ........................................................... 17
Application Hints ........................................................................... 19
Outline Dimensions ....................................................................... 20
Normal Mode .............................................................................. 13
Power-Down Mode .................................................................... 14
AD7940 to TMS320C541 .......................................................... 17
AD7940 to ADSP-218x .............................................................. 17
AD7940 to DSP563xx ................................................................ 18
Grounding and Layout .............................................................. 19
Evaluating the AD7940 Performance ...................................... 19
Ordering Guide .......................................................................... 20
AD7940