AD8244Data SheetTYPICAL PERFORMANCE CHARACTERISTICS VS = ±5 V, TA = 25°C, VIN = 0 V, RL = 10 kΩ, unless otherwise noted. 5040403030ITSITSHH2020101000–400–2000200400600 004 –800–600–400–2000200400600800 007 OFFSET VOLTAGE (µV) 1689- 1689- 1 OFFSET VOLTAGE MATCHING (µV) 1 Figure 4. Typical Distribution of Offset Voltage Figure 7. Typical Distribution of Offset Voltage Matching 12VS = ±15VVIN = ±3VTA = –40°C TO +85°C40103583025ITS6HITS H2041510250 005 0–10 –9 –8 –7 –6 –5 –4 –3 –2 –10 123456789 10–300–200–1000100200300 008 1689- OFFSET VOLTAGE DRIFT (µV/°C) 1 SYSTEM ERROR (µV/V) 1689- 1 Figure 5. Typical Distribution of Offset Voltage Drift Figure 8. Typical Distribution of System Error 2550VS = ±3V TO ±18V20401530ITS HITS H10205100–0.60–0.55–0.50–0.45–0.40–0.350 006 –40–20020406080 009 INPUT BIAS CURRENT (pA) 1689- 1 PSRR (µV/V) 1689- 1
Figure 6. Typical Distribution of Input Bias Current Figure 9. Typical Distribution of Power Supply Rejection Ratio (PSRR) Rev. A | Page 8 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