Datasheet AD8235 (Analog Devices) - 9

Data Sheet AD8235 TYPICAL PERFORMANCE CHARACTERISTICS
G = 5, +VS = 5 V, VREF = 2.5 V, RL = 100 kΩ tied to GND, TA = 25°C, SDN pin connected to +VS, unless otherwise noted
2400 GAIN = 5 2100 1800 S T 1500 UNI F O R 1200 BE 900 NUM 600 300
5 8 10 00 1-
5µV/DIV 1s/DIV
1- 21 21
0
08 08
–40 –30 –20 –10 0 10 20 30 40 CMRR (µV/V)
Figure 5. CMRR Distribution Figure 8. 0.1 Hz to 10 Hz RTI Voltage Noise
400 GAIN = 200 350 300 S T UNI 250 F R O 200 BE M 150 NU 100 50
9 05 0 00 1- 1- 1
5µV/DIV 1s/DIV
2 21
0
08 08
–3000 –2000 –1000 0 1000 2000 3000 VOSI (µV)
Figure 6. Typical Distribution of Input Offset Voltage Figure 9. 0.1 Hz to 10 Hz RTI Voltage Noise
1k 140 120 GAIN = 200 100 GAIN = 100 ) INTERNAL ) CLIPPING /√Hz B 80 V (d (n 100 GAIN = 5 E RR IS 60 GAIN = 200 PS NO BANDWIDTH LIMITED 40 20 GAIN = 10 GAIN = 5 10 0
7 0
1 10 100 1k 10k
00
0.1 1 10 100 1k 10k 100k
-01 1-
FREQUENCY (Hz)
11 21
FREQUNCY (Hz)
82 08 0 Figure 7. Voltage Noise Spectral Density vs. Frequency Figure 10. Positive PSRR vs. Frequency, RTI, VS = ±0.9 V, ±2.5 V, VREF = 0 V Rev. A | Page 9 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