Datasheet AD7783 (Analog Devices) - 4

AD7783 Parameter AD7783B Unit Test Conditions
LOGIC INPUTS All Inputs Except SCLK and XTAL12 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)2 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(+) 0.95/2 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 XTAL1 Only2 VINL, Input Low Voltage 0.8 V max VDD = 5 V VINH, Input High Voltage 3.5 V min VDD = 5 V VINL, Input Low Voltage 0.4 V max VDD = 3 V VINH, Input High Voltage 2.5 V min VDD = 3 V Input Currents ±1 mA max VIN = VDD –70 mA max VIN = GND, Typically –40 mA at 5 V and –20 mA at 3 V Input Capacitance 10 pF typ All Digital Inputs LOGIC OUTPUTS (Excluding XTAL2) VOH, Output High Voltage2 VDD – 0.6 V min VDD = 3 V, ISOURCE = 100 mA VOL, Output Low Voltage2 0.4 V max VDD = 3 V, ISINK = 100 mA VOH, Output High Voltage2 4 V min VDD = 5 V, ISOURCE = 200 mA VOL, Output Low Voltage2 0.4 V max VDD = 5 V, ISINK = 1.6 mA Floating-State Leakage Current ±10 mA max Floating-State Output Capacitance ±10 pF typ Data Output Coding Offset Binary START-UP TIME From Power-On 300 ms typ POWER REQUIREMENTS Power Supply Voltage VDD – GND 2.7/3.6 V min/V max VDD = 3 V nom 4.75/5.25 V min/V max VDD = 5 V nom Power Supply Currents IDD Current (Normal Mode)4 1.5 mA max VDD = 3 V, 1.3 mA typ 1.7 mA max VDD = 5 V, 1.5 mA typ IDD (Power-Down Mode, CS = 1) 9 mA max VDD = 3 V, 6 mA typ 24 mA max VDD = 5 V, 20 mA typ NOTES 1Temperature range –40∞C to +85∞C. 2Guaranteed by design and/or characterization data on production release. 3When a 28.8 kHz crystal is used, normal-mode rejection is improved so that the rejection equals 75 dB at 50 Hz ±1 Hz and equals 66 dB at 60 Hz ± 1 Hz. 4Normal mode refers to the case where the ADC is running. Specifications subject to change without notice. REV. C –3– Document Outline FEATURES INTERFACE POWER ON-CHIP FUNCTIONS APPLICATIONS FUNCTIONAL BLOCK DIAGRAM BASIC CONNECTION DIAGRAM GENERAL DESCRIPTION SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS Typical Performance Characteristics ADC CIRCUIT INFORMATION Overview NOISE PERFORMANCE DIGITAL INTERFACE MASTER MODE (MODE = 0) SLAVE MODE (MODE = 1) CIRCUIT DESCRIPTION Analog Input Channel Programmable Gain Amplifier Bipolar Configuration/Output Coding Excitation Currents Crystal Oscillator Reference Input Grounding and Layout OUTLINE DIMENSIONS Revision History