AD7783 Просмотр технического описания (PDF) - Analog Devices

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AD7783

Read-Only, Pin Configured 24-Bit Σ-Δ ADC with Excitation Current Sources

Analog Devices 

AD7783

CS (I)

DOUT/RDY (O)

t2

t3

MSB

LSB

MSB

SLAVE MODE

SCLK (I)

MASTER MODE

SCLK (O)

t4

t9

t4

t10

t6

t5

t6

t5

I = INPUT TO AD7783, AND O = OUTPUT FROM AD7783.

SLAVE MODE IS SELECTED BY TYING THE MODE PIN +,*+, WHILE MASTER MODE IS SELECTED BY TYING THE MODE PIN /2:.

t8

t7

LSB

Figure 2. Slave/Master Mode Timing Diagram

ABSOLUTE MAXIMUM RATINGS*

TSSOP Package

(TA = 25∞C, unless otherwise noted.)

VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

␪JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . 97.9∞C/W

␪JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 14∞C/W

Analog Input Voltage to GND . . . . . . . –0.3 V to VDD + 0.3 V

Reference Input Voltage to GND . . . . –0.3 V to VDD + 0.3 V

Total AIN/REFIN Current (Indefinite) . . . . . . . . . . . . . 30 mA

Lead Temperature, Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215∞C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220∞C

Digital Input Voltage to GND . . . . . . . –0.3 V to VDD + 0.3 V *Stresses above those listed under Absolute Maximum Ratings may cause per-

Digital Output Voltage to GND . . . . . –0.3 V to VDD + 0.3 V

Operating Temperature Range . . . . . . . . . . . –40∞C to +85∞C

Storage Temperature Range . . . . . . . . . . . . –65∞C to +150∞C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150∞C

manent 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

conditions for extended periods may affect device reliability.

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

AD7783 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.

REV. C

–5–

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