Datasheet AD8428 (Analog Devices) - 4

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AD8428 Data Sheet Test Conditions/ A Grade B Grade Parameter Comments Min Typ Max Min Typ Max Unit
FILTER TERMINALS Input Impedance, R 2 IN 6 6 kΩ Voltage Range −VS +VS −VS +VS V POWER SUPPLY Operating Range ±4 ±18 ±4 ±18 V Quiescent Current 6.5 6.8 6.5 6.8 mA Over Temperature TA = −40°C to +85°C 8 8 mA 1 The differential and common-mode input impedances can be calculated from the pin impedance: ZDIFF = 2(ZPIN); ZCM = ZPIN/2. 2 To calculate the actual impedance, see Figure 1. Rev. A | Page 4 of 20 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ARCHITECTURE FILTER TERMINALS REFERENCE TERMINAL INPUT VOLTAGE RANGE LAYOUT Common-Mode Rejection Ratio over Frequency Power Supplies and Grounding Reference Pin INPUT BIAS CURRENT RETURN PATH INPUT PROTECTION IMAX Input Voltages Beyond the Rails Large Differential Input Voltage at High Gain RADIO FREQUENCY INTERFERENCE (RFI) CALCULATING THE NOISE OF THE INPUT STAGE Source Resistance Noise Voltage Noise of the Instrumentation Amplifier Current Noise of the Instrumentation Amplifier Total Noise Density Calculation APPLICATIONS INFORMATION EFFECT OF PASSIVE NETWORK ACROSS THE FILTER TERMINALS CIRCUITS USING THE FILTER TERMINALS Setting the Amplifier to Different Gains Low-Pass Filter Notch Filter Extracting the Common-Mode Voltage of the Input OUTLINE DIMENSIONS ORDERING GUIDE