Datasheet AD7788, AD7789 (Analog Devices) - 5

Data Sheet AD7788/AD7789 AD7788/ AD7789 Table 3. Parameter AD7788A, AD7788B/ AD7789B Unit Test Conditions/Comments
LOGIC INPUTS All Inputs Except SCLK1 VINL, Input Low Voltage 0.8 V max VDD = 5 V 0.4 V max VDD = 3 V VINH, Input High Voltage 2.0 V min VDD = 3 V or 5 V SCLK Only (Schmitt-Triggered Input)1 VT(+) 1.4/2 V min/V max VDD = 5 V VT(−) 0.8/1.4 V min/V max VDD = 5 V VT(+) − VT(−) 0.3/0.85 V min/V max VDD = 5 V VT(+) 0.9/2 V min/V max VDD = 3 V VT(−) 0.4/1.1 V min/V max VDD = 3 V VT(+) − VT(−) 0.3/0.85 V min/V max VDD = 3 V Input Currents ±1 µA max VIN = VDD Input Capacitance 10 pF typ All digital inputs LOGIC OUTPUTS VOH, Output High Voltage1 VDD − 0.6 V min VDD = 3 V, ISOURCE = 100 µA VOL, Output Low Voltage1 0.4 V max VDD = 3 V, ISINK = 100 µA VOH, Output High Voltage1 4 V min VDD = 5 V, ISOURCE = 200 µA VOL, Output Low Voltage1 0.4 V max VDD = 5 V, ISINK = 1.6 mA Floating-State Leakage Current ±1 µA max Floating-State Output Capacitance 10 pF typ Data Output Coding Offset binary POWER REQUIREMENTS2 Power Supply Voltage VDD − GND 2.5/5.25 V min/max AD7789, AD7788 B grade 2.7/5.25 V min/max AD7788 A grade Power Supply Currents IDD Current 75 µA max 65 µA typ, VDD = 3.6 V 80 µA max 73 µA typ, VDD = 5.25 V IDD (Power-Down Mode) 1 µA max 1 Specification is not production tested but is supported by characterization data at initial product release. 2 Digital inputs equal to VDD or GND. Rev. C | Page 5 of 20 Document Outline FEATURES INTERFACE APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS SPECIFICATIONS AD7789 AD7788 AD7788/AD7789 TIMING CHARACTERISTICS TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS ON-CHIP REGISTERS COMMUNICATIONS REGISTER (RS1, RS0 = 0, 0) STATUS REGISTER (RS1, RS0 = 0, 0; Power-On/Reset = 0x88 for AD7788 and 0x8C for AD7789) MODE REGISTER (RS1, RS0 = 0, 1; Power-On/Reset = 0x02) DATA REGISTER (RS1, RS0 = 1, 1; Power-On/Reset = 0x0000 for the AD7788 and 0x000000 for the AD7789) ADC CIRCUIT INFORMATION NOISE PERFORMANCE DIGITAL INTERFACE Single Conversion Mode Continuous Conversion Mode Continuous Read Mode CIRCUIT DESCRIPTION ANALOG INPUT CHANNEL BIPOLAR/UNIPOLAR CONFIGURATION DATA OUTPUT CODING REFERENCE INPUT VDD MONITOR GROUNDING AND LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE NOTES