link to page 9 AD7997/AD7998ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. Table 4. Stresses above those listed under Absolute Maximum Ratings Parameter Rating may cause permanent damage to the device. This is a stress VDD to GND −0.3 V to 7 V rating only; functional operation of the device at these or any Analog Input Voltage to GND −0.3 V to VDD + 0.3 V other conditions above those listed in the operational sections Reference Input Voltage to GND −0.3 V to VDD + 0.3 V of this specification is not implied. Exposure to absolute Digital Input Voltage to GND −0.3 V to +7 V maximum rating conditions for extended periods may affect Digital Output Voltage to GND −0.3 V to VDD + 0.3 V device reliability. Input Current to Any Pin Except Supplies1 ±10 mA Operating Temperature Range Commercial (B Version) −40°C to +85°C Storage Temperature Range −65°C to +150° Junction Temperature 150°C 20-Lead TSSOP θJA Thermal Impedance 143°C/W θJC Thermal Impedance 45°C/W Pb/SN Temperature, Soldering Reflow (10 s to 30 s) 240 (+0/-5)°C Pb-free Temperature, Soldering Reflow 260 (+0)°C ESD 1.5 kV 1 Transient currents of up to 100 mA do not cause SCR latch-up. ESD 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 this product 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. 0 | Page 9 of 32 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS AD7997 SPECIFICATIONS AD7998 SPECIFICATIONS I2C TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND PIN FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION TYPICAL CONNECTION DIAGRAM ANALOG INPUT INTERNAL REGISTER STRUCTURE ADDRESS POINTER REGISTER CONFIGURATION REGISTER CONVERSION RESULT REGISTER LIMIT REGISTERS DATAHIGH Register CH1/CH2/CH3/CH4 DATALOW Register CH1/CH2/CH3/CH4 Hysteresis Register (CH1/CH2/CH3/CH4) Using the Limit Registers to Store Min/Max Conversion Result ALERT STATUS REGISTER (CH1 TO CH4) CYCLE TIMER REGISTER SAMPLE DELAY AND BIT TRIAL DELAY SERIAL INTERFACE SERIAL BUS ADDRESS WRITING TO THE AD7997/AD7998 WRITING TO THE ADDRESS POINTER REGISTER FOR A SUBSEQUENT REA WRITING A SINGLE BYTE OF DATA TO THE ALERT STATUS REGISTER O WRITING TWO BYTES OF DATA TO A LIMIT, HYSTERESIS, OR CONFIGU READING DATA FROM THE AD7997/AD7998 ALERT/BUSY PIN SMBus ALERT BUSY PLACING THE AD7997-1/AD7998-1 INTOHIGH SPEED MODE THE ADDRESS SELECT (AS) PIN MODES OF OPERATION MODE 1—USING THE PIN MODE 2 – COMMAND MODE MODE 3—AUTOMATIC CYCLE INTERVAL MODE OUTLINE DIMENSIONS ORDERING GUIDE RELATED PARTS IN I2C-COMPATIBLE ADC PRODUCT FAMILY
