Datasheet AD8421 (Analog Devices) - 4

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AD8421 Data Sheet AR Grade BR Grade Test Conditions/ Parameter Comments Min Typ Max Min Typ Max Unit
DYNAMIC RESPONSE Small Signal Bandwidth −3 dB G = 1 10 10 MHz G = 10 10 10 MHz G = 100 2 2 MHz G = 1000 0.2 0.2 MHz Settling Time to 0.01% 10 V step G = 1 0.7 0.7 μs G = 10 0.4 0.4 μs G = 100 0.6 0.6 μs G = 1000 5 5 μs Settling Time to 0.001% 10 V step G = 1 1 1 μs G = 10 0.6 0.6 μs G = 100 0.8 0.8 μs G = 1000 6 6 μs Slew Rate G = 1 to 100 35 35 V/μs GAIN3 G = 1 + (9.9 kΩ/RG) Gain Range 1 10,000 1 10,000 V/V Gain Error VOUT = ±10 V G = 1 0.02 0.01 % G = 10 to 1000 0.2 0.1 % Gain Nonlinearity VOUT = −10 V to +10 V G = 1 RL ≥ 2 kΩ 1 1 ppm RL = 600 Ω 1 3 1 3 ppm G = 10 to 1000 RL ≥ 600 Ω 30 50 30 50 ppm VOUT = −5 V to +5 V 5 10 5 10 ppm Gain vs. Temperature3 G = 1 5 0.1 1 ppm/°C G > 1 −50 −50 ppm/°C INPUT Input Impedance Differential 30||3 30||3 GΩ||pF Common Mode 30||3 30||3 GΩ||pF Input Operating Voltage Range4 VS = ±2.5 V to ±18 V −VS + 2.3 +VS − 1.8 −VS + 2.3 +VS − 1.8 V Over Temperature TA = −40°C −VS + 2.5 +VS − 2.0 −VS + 2.5 +VS − 2.0 V TA = +85°C −VS + 2.1 +VS − 1.8 −VS + 2.1 +VS − 1.8 V OUTPUT RL = 2 kΩ Output Swing VS = ±2.5 V to ±18 V −VS + 1.2 +Vs − 1.6 −VS + 1.2 +VS − 1.6 V Over Temperature TA = −40°C to +85°C −VS + 1.2 +Vs − 1.6 −VS + 1.2 +VS − 1.6 V Short-Circuit Current 65 65 mA REFERENCE INPUT RIN 20 20 kΩ IIN VIN+, VIN− = 0 V 20 24 20 24 μA Voltage Range −VS +VS −VS +VS V Reference Gain to Output 1 ± 1 ± V/V 0.0001 0.0001 Rev. 0 | Page 4 of 28 Document Outline FEATURES APPLICATIONS PIN CONNECTION DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS AR AND BR GRADES ARM AND BRM GRADES ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ARCHITECTURE GAIN SELECTION RG Power Dissipation REFERENCE TERMINAL INPUT VOLTAGE RANGE LAYOUT Common-Mode Rejection Ratio over Frequency Power Supplies and Grounding Reference Pin INPUT BIAS CURRENT RETURN PATH INPUT VOLTAGES BEYOND THE SUPPLY RAILS Input Voltages Beyond the Maximum Ratings 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 DIFFERENTIAL OUTPUT CONFIGURATION DRIVING AN ADC OUTLINE DIMENSIONS ORDERING GUIDE