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AD7782

Read Only, Pin Configured 24-Bit Σ-Δ ADC

Analog Devices 

AD7782

CH1/CH2 (I)

t2

CS (I)

DOUT/RDY

t3

t4

MSB

LSB

MSB

t9

t8

LSB

SLAVE MODE

SCLK (I)

MASTER MODE

SCLK (O)

t5

t10

t7

t6

t5

t11

t7

t6

I = INPUT TO AD7782, O = OUTPUT FROM AD7782

MASTER MODE IS SELECTED BY TYING THE MODE PIN LOW, WHEREAS SLAVE MODE IS SELECTED BY TYING THE MODE PIN HIGH.

Figure 2. Slave/Master Mode Timing Diagram

ABSOLUTE MAXIMUM RATINGS*

(TA = 25°C unless otherwise noted)

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

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

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

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

TSSOP Package

θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . .97.9°C/W

θJC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 14°C/W

Lead Temperature, Soldering

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

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

*Stresses above those listed under Absolute Maximum Ratings may cause per-

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 AD7782 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

REV. A

–5–

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