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AD7856

Features: Single 5V Supply285 kSPS Throughput RateSelf- and System Calibration with Autocalibration onPower-UpEight Single-Ended or Four Pseudo-Differential InputsLow Power: 60 mW TypAutomatic Power-Down After Conversion (2.5mW Typ)Flexible Serial Interface: 8051/SPI™/QSPI™/mP Compatib...

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SeekIC No. : 004271062 Detail

AD7856: Features: Single 5V Supply285 kSPS Throughput RateSelf- and System Calibration with Autocalibration onPower-UpEight Single-Ended or Four Pseudo-Differential InputsLow Power: 60 mW TypAutomatic Power...

AD7856 Data Sheet

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Part Number:
AD7856
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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




Application

Battery-Powered Systems (Personal Digital Assistants,
Medical Instruments, Mobile Communications)
Pen Computers
Instrumentation and Control Systems
High Speed Modems




Pinout

AD7856 Diagram




Specifications

AVDDto AGND . . . . . . . . . . . . . . . . . . ....... . ... . .0.3 V to +7 V
DVDDto DGND . . . . . . . . . . . . . . . . . . . . ......... . .0.3 V to +7 V
AVDDto 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 OUTto 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
JAThermal Impedance . . . . . . . . . . . . . . . . . . . .105°C/WJC
Thermal Impedance . . . . . . . . . . . . . . . . . . ........... .34.7°C/W
Lead Temperature, (Soldering, 10 secs) . . . . . ...... . . .+260°C
SOIC, SSOP Package, Power Dissipation . . . . . ..... . . .450 mW
JAThermal Impedance .75°C/W (SOIC) 115°C/W (SSOP)
JCThermal 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

Resolution (Bits) 14bit
T-Put Rate 285kSPS
# Chan 8
Supply V Single(+5)
Pwr Diss 89.25mW
Interface Ser,SPI
Ain Range (Vref) p-p,Uni (Vref)
SNR (dB) 78dB
Pkg Type DIP,SOIC,SOP





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 toVREFwith 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.






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