AD7298 Analog Devices, AD7298 Datasheet - Page 2

• Manufacturer Part Number: AD7298
• Description: 8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor
• Manufacturer: Analog Devices

Specifications of AD7298

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 1MSPS
• Interface: SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni 1.0V,Uni 1.25,Uni 2.0V,Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: CSP

AD7298
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 Configuration and Function Description .............................. 7
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 12
Circuit Information ........................................................................ 13
REVISION HISTORY
6/11—Rev. A to Rev. B
Changes to Internal Temperature Sensor, Accuracy Parameter
in Table 1............................................................................................ 3
1/11—Rev. 0 to Rev. A
Removed Input Impedance Parameter .......................................... 3
Added Input Capacitance Parameter of 8 pF................................ 3
Changes to Figure 11...................................................................... 10
Changed C1 Value to 8 pF in Analog Input Section.................. 13
Changes to Figure 23...................................................................... 14
Changes to Ordering Guide .......................................................... 24
9/10—Revision 0: Initial Version
Timing Specifications .................................................................. 5
ESD Caution.................................................................................. 6
Thermal Resistance ...................................................................... 6
Converter Operation.................................................................. 13
Analog Input ............................................................................... 13
Temperature Sensor Operation ................................................ 14
Rev. B | Page 2 of 24
Control Register.............................................................................. 16
Modes of Operation ....................................................................... 17
Serial Interface ................................................................................ 21
Layout and Configuration............................................................. 23
Outline Dimensions ....................................................................... 24
Temperature Sensor Averaging ................................................ 14
V
The Internal or External Reference.......................................... 15
Traditional Multichannel Mode of Operation........................ 17
Repeat Operation ....................................................................... 18
Power-Down Modes .................................................................. 19
Powering Up the AD7298 ......................................................... 20
Reset ............................................................................................. 20
Temperature Sensor Read ......................................................... 22
Power Supply Bypassing and Grounding................................ 23
Temperature Monitoring........................................................... 23
Ordering Guide .......................................................................... 24
DRIVE
............................................................................................ 15