Datasheet AD8235 (Analog Devices) - 6

AD8235 Data Sheet Parameter Test Conditions Min Typ Max Unit
GAIN Gain Range G = 5 + 420 kΩ/RG 5 2001 V/V Gain Error VS = ±0.9 V, VREF = 0 V, VOUT = −0.6 V to +0.6 V G = 5 0.005 0.05 % G = 10 0.03 0.2 % G = 100 0.06 0.2 % G = 200 0.15 0.3 % Nonlinearity RL = 10 kΩ or 100 kΩ G = 5 1 10 ppm G = 10 1 10 ppm G = 100 0.5 10 ppm G = 200 0.4 10 ppm Gain vs. Temperature −40°C to +125°C G = 5 0.35 1.5 ppm/°C G > 10 −50 ppm/°C INPUT Differential Impedance 440||1.6 GΩ||pF Common-Mode Impedance 110||6.2 GΩ||pF Input Voltage Range −40°C to +125°C 0 +VS V OUTPUT Output Voltage High, VOH RL = 100 kΩ 1.78 1.79 V −40°C to +125°C 1.78 V RL = 10 kΩ 1.65 1.75 V −40°C to +125°C 1.65 V Output Voltage Low, VOL RL = 100 kΩ 2 5 mV −40°C to +125°C 5 mV RL = 10 kΩ 12 25 mV −40°C to +125°C 25 mV Short-Circuit Limit, ISC ±6 mA REFERENCE INPUT RIN −IN, +IN = 0 V 210 kΩ IIN 20 nA Voltage Range −VS +VS V Gain to Output 1 V/V SHUTDOWN OPERATION Shutdown Current 6 500 nA −40°C to +125°C 1.5 µA SDN PIN INPUT VOLTAGE RANGE VOH −40°C to +125°C +VS − 0.5 +VS V VOL −40°C to +125°C −VS −VS + 0.5 V TEMPERATURE RANGE For Specified Performance −40 +125 °C 1 Although the specifications of the AD8235 list only low to midrange gains, gains can be set beyond 200. Rev. A | Page 6 of 20 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION CONNECTION DIAGRAM PIN CONFIGURATION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BASIC OPERATION GAIN SELECTION SHUTDOWN FEATURE LAYOUT RECOMMENDATIONS Pad Opening Pad Type Pad Finish Board Thickness Grounding REFERENCE TERMINAL POWER SUPPLY REGULATION AND BYPASSING INPUT BIAS CURRENT RETURN PATH INPUT PROTECTION RF INTERFERENCE COMMON-MODE INPUT VOLTAGE RANGE APPLICATIONS INFORMATION AC-COUPLED INSTRUMENTATION AMPLIFIER LOW POWER HEART RATE MONITOR OUTLINE DIMENSIONS ORDERING GUIDE