EVAL-AD7856CB 查看數據表（PDF） - Analog Devices

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EVAL-AD7856CB

5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC

Analog Devices 

AD7856

ABSOLUTE MAXIMUM RATINGS1

(TA = +25°C unless otherwise noted)

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 . . . –0.3 V to DVDD + 0.3 V

REFIN/REFOUT to AGND . . . . . . . . . ␣ –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

θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . 105°C/W

θJC Thermal Impedance . . . . . . . . . . . . . . . . . . . . 34.7°C/W

Lead Temperature, (Soldering, 10 secs) . . . . . . . . . +260°C

SOIC, SSOP Package, Power Dissipation . . . . . . . . . 450 mW

θJA Thermal Impedance . 75°C/W (SOIC) 115°C/W (SSOP)

θJC 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

NOTES

1Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those listed in the operational sections

of this specification is not implied. Exposure to absolute maximum rating condi-

tions for extended periods may affect device reliability.

2Transient currents of up to 100 mA will not cause SCR latch-up.

ORDERING GUIDE

Model

AD7856AN

AD7856AR

AD7856KR

AD7856ARS

EVAL-AD7856CB3

EVAL-CONTROL BOARD4

Linearity

Error

(LSB)1

± 2 typ

± 2 typ

±2

± 2 typ

Package

Options2

N-24

R-24

R-24

RS-24

NOTES

1Linearity error here refers to integral linearity error.

2N = Plastic DIP; R = SOIC; RS = SSOP.

3This can be used as a stand-alone evaluation board or in conjunction with the

EVAL-CONTROL BOARD for evaluation/demonstration purposes.

4This board is a complete unit allowing a PC to control and communicate with

all Analog Devices evaluation boards ending in the CB designators.

PIN CONFIGURATIONS

(DIP, SOIC AND SSOP)

CONVST 1

24 SYNC

BUSY 2

23 SCLK

SLEEP 3

22 CLKIN

REFIN/REFOUT 4

AVDD 5

AD7856

21 DIN

20 DOUT

AGND 6 TOP VIEW 19 DGND

CREF1 7 (Not to Scale) 18 DVDD

CREF2 8

17 CAL

AIN1 9

16 AIN8

AIN2 10

15 AIN7

AIN3 11

14 AIN6

AIN4 12

13 AIN5

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD7856 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

–6–

REV. A

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