Datasheet AD8244 (Analog Devices) - 4

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Data Sheet AD8244 SPECIFICATIONS
+VS = 5 V, –VS = 0 V, TA = 25°C, VIN = 0.2 V, RL = 10 kΩ to ground, unless otherwise noted.
Table 1. AD8244A AD8244B Parameter Test Conditions/Comments Min Typ Max Min Typ Max Unit
DC PERFORMANCE Offset Voltage 100 600 100 350 µV Over Temperature TA = −40°C to +85°C 1.25 0.675 mV Average Temperature Coefficient TA = −40°C to +85°C 10 5 µV/°C Offset Voltage Matching Channel to channel 800 500 µV Input Bias Current 0.5 10 0.5 2 pA Over Temperature TA = 85°C 150 50 pA Input Bias Current Matching Channel to channel 0.05 0.05 0.2 pA Over Temperature TA = 85°C 2 2 pA SYSTEM PERFORMANCE Nominal Gain 1 1 V/V System Error1 VOUT = 0.2 V to 3 V 0.08 0.05 % Average Temperature Coefficient TA = −40°C to +85°C 2 1 ppm/°C Gain Matching Channel to channel 0.10 0.08 % NOISE PERFORMANCE Voltage Noise Spectral Density f = 1 kHz 13 13 nV/√Hz Peak-to-Peak f = 0.1 Hz to 10 Hz 0.4 0.4 2 µV p-p Current Noise Spectral Density f = 1 kHz 0.8 0.8 fA/√Hz Peak-to-Peak f = 0.1 Hz to 10 Hz 8 8 fA p-p DYNAMIC PERFORMANCE Small Signal Bandwidth −3 dB 3 3 MHz Slew Rate 0.8 0.8 V/µs Settling Time to 0.01% VOUT = 0.2 V to 3 V 8 8 µs INPUT CHARACTERISTICS Input Voltage Range2 0 4 0 4 V Over Temperature TA = −40°C to +85°C 0 3.5 0 3.5 V Input Impedance3 10||4 10||4 TΩ||pF OUTPUT CHARACTERISTICS Output Swing RL = 10 kΩ to ground 0.025 4.9 0.025 4.9 V Over Temperature TA = −40°C to +85°C 0.03 4.88 0.03 4.88 V Output Swing RL = no load 0.025 4.97 0.025 4.97 V Over Temperature TA = −40°C to +85°C 0.03 4.95 0.03 4.95 V Short-Circuit Current 8 8 mA Capacitive Load Drive 200 200 pF POWER SUPPLY Operating Range Single supply 3 36 3 36 V Dual supply ±1.5 ±18 ±1.5 ±18 V Power Supply Rejection VIN = 2.5 V, +VS = 4.5 V to 5.5 V 80 80 dB Supply Current per Amplifier IOUT = 0 mA 180 250 180 250 µA Over Temperature TA = −40°C to +85°C 300 300 µA TEMPERATURE RANGE Specified Performance −40 +85 −40 +85 °C 1 Error as a percentage of the measurement. This includes the effects of open-loop gain and common-mode rejection ratio. 2 The inputs of the AD8244 can go up to the positive supply; however, the input range is derated because error increases near the positive supply as the input transistors start to saturate. The inputs also maintain high impedance when driven slightly below ground. 3 For more information on the input impedance, see Figure 24 and Figure 37. Rev. A | Page 3 of 20 Document Outline FEATURES APPLICATIONS PIN CONFIGURATION 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 OVERVIEW GUARDING INPUT PROTECTION LAYOUT CONSIDERATIONS DIFFERENTIAL SIGNAL CHAINS LOW OUTPUT IMPEDANCE vs. FREQUENCY APPLICATIONS INFORMATION ELECTROCARDIOGRAM (ECG) FILTERING Sallen-Key Low-Pass Filter Sallen-Key High-Pass Filter Twin-T Notch Filter PHOTODIODE AMPLIFIER LOW NOISE, JFET INPUT BUFFER OUTLINE DIMENSIONS ORDERING GUIDE