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MFG:ADI D/C:09
Part Number: AD7856
MFG: ADI
D/C: 09
Description: The AD7856 is a high speed, low power, 14-bit ADC that oper-ates from a single 5 V power supply. The A...
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AD7856
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DataSheet
General Description
AD7856 General Description
The AD7856 is a high speed, low power, 14-bit ADC that oper-ates from a single 5 V power supply. The ADC powers up with a set of default conditions at which time it can be operated as a read only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time andpower applications.The AD7856 is capable of 285kHzthroughput rate. The inputtrack-and-hold acquires a signal in 500 ns and features a pseudo-differential sampling scheme.
The AD7856 voltage range is 0 toVREF with straight binary output coding. Input signal range is to the supply and the part is capable of converting full power sig- nals to 10 MHz. CMOS construction ensures low power dissipation of typically 60 mW for normal operation and 5.1 mW in power-down mode at 10 kSPS throughput rate. The part is available in 24-lead, 0.3 inch-wide dual in-line package (DIP), 24-lead small outline (SOIC) and 24-lead small shrink outline (SSOP) packages. Please see page 31 for data sheet index.
AD7856 Maximum Ratings
AVDD to AGND . . . . . . . . . . . . . . . . . . ....... . ... . .0.3 V to +7 V
DVDD to DGND . . . . . . . . . . . . . . . . . . . . ......... . .0.3 V to +7 V
AVDD to DVDD␣ . . . . . . . . . . . . . . . . . .... . . . . .0.3 V to +0.3 V
Analog Input Voltage to AGND . . ........ ..0.3 V to AVDD + 0.3 V
Digital Input Voltage to DGND . . . ........0.3 V to DVDD + 0.3 V
Digital Output Voltage to DGND . M. .0.3 V to DVDD + 0.3 VREF
IN/REF OUT to AGND . . . . ... . . .MMMM ..0.3 V to AVDD + 0.3 V
Input Current to Any Pin Except Supplies2 . . . ..... . . .±10 mA
Operating Temperature Range Commercial
A Version . . . . . . . . . . . . . . . . . . . . . . . ...... .40°C to +105°C
K Version . . . . . . . . . . . . . . . . . . . . . . . . ...... . .0°C to +105°C
Storage Temperature Range . . . . . . . . . .. . .65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . .. . . .+150°C
Plastic DIP Package, Power Dissipation . . . . . . ..... . . .450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . .105°C/WJC
Thermal Impedance . . . . . . . . . . . . . . . . . . ........... .34.7°C/W
Lead Temperature, (Soldering, 10 secs) . . . . . ...... . . .+260°C
SOIC, SSOP Package, Power Dissipation . . . . . ..... . . .450 mW
JA Thermal Impedance .75°C/W (SOIC) 115°C/W (SSOP)
JC Thermal Impedance . .25°C/W (SOIC) 35°C/W (SSOP)
Lead Temperature, Soldering
Vapor Phase (60 secs) . . . . . . . . . . . . . . . . . . . .... ... . .+215°C
Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . ..... . .+220°C
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . .>1 kV
DVDD to DGND . . . . . . . . . . . . . . . . . . . . ......... . .0.3 V to +7 V
AVDD to DVDD␣ . . . . . . . . . . . . . . . . . .... . . . . .0.3 V to +0.3 V
Analog Input Voltage to AGND . . ........ ..0.3 V to AVDD + 0.3 V
Digital Input Voltage to DGND . . . ........0.3 V to DVDD + 0.3 V
Digital Output Voltage to DGND . M. .0.3 V to DVDD + 0.3 VREF
IN/REF OUT to AGND . . . . ... . . .MMMM ..0.3 V to AVDD + 0.3 V
Input Current to Any Pin Except Supplies2 . . . ..... . . .±10 mA
Operating Temperature Range Commercial
A Version . . . . . . . . . . . . . . . . . . . . . . . ...... .40°C to +105°C
K Version . . . . . . . . . . . . . . . . . . . . . . . . ...... . .0°C to +105°C
Storage Temperature Range . . . . . . . . . .. . .65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . .. . . .+150°C
Plastic DIP Package, Power Dissipation . . . . . . ..... . . .450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . .105°C/WJC
Thermal Impedance . . . . . . . . . . . . . . . . . . ........... .34.7°C/W
Lead Temperature, (Soldering, 10 secs) . . . . . ...... . . .+260°C
SOIC, SSOP Package, Power Dissipation . . . . . ..... . . .450 mW
JA Thermal Impedance .75°C/W (SOIC) 115°C/W (SSOP)
JC Thermal Impedance . .25°C/W (SOIC) 35°C/W (SSOP)
Lead Temperature, Soldering
Vapor Phase (60 secs) . . . . . . . . . . . . . . . . . . . .... ... . .+215°C
Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . ..... . .+220°C
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . .>1 kV
AD7856 Features
Single 5V Supply
285 kSPS Throughput Rate
Self- and System Calibration with Autocalibration on
Power-Up
Eight Single-Ended or Four Pseudo-Differential Inputs
Low Power: 60 mW Typ
Automatic Power-Down After Conversion (2.5mW Typ)
Flexible Serial Interface: 8051/SPI™/QSPI™/mP Compatible
24-Lead DIP, SOIC and SSOP Packages
285 kSPS Throughput Rate
Self- and System Calibration with Autocalibration on
Power-Up
Eight Single-Ended or Four Pseudo-Differential Inputs
Low Power: 60 mW Typ
Automatic Power-Down After Conversion (2.5mW Typ)
Flexible Serial Interface: 8051/SPI™/QSPI™/mP Compatible
24-Lead DIP, SOIC and SSOP Packages
AD7856 Typical Application
Battery-Powered Systems (Personal Digital Assistants,
Medical Instruments, Mobile Communications)
Pen Computers
Instrumentation and Control Systems
High Speed Modems
Medical Instruments, Mobile Communications)
Pen Computers
Instrumentation and Control Systems
High Speed Modems
AD7856
PDF/DataSheet Download
- Datasheet: AD7856
- File Size: 301333 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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