Datasheet AD8420 (Analog Devices) - 10

AD8420 Data Sheet 3.0 0.5 15 0.6 VS = +5V VS = ±15V G = 1 G = 100 V VOUT 2.5 –IN = 0V 0.4 V 10 0.4 REF = 0V ) VOUT IIN I ) IN V (V A) A) 2.0 0.3 ( E 5 0.2 G (m GE (m A NT NT LT LTA O 1.5 0.2 RRE O 0 0 V V T T URRE U CU U C P TP UT 1.0 0.1 T UT U –5 –0.2 U O INP O INP 0.5 0 –10 –0.4 0 –0.1
9
–15 –0.6 –5 0 5 10 15 20 25 30 35 40
12 -30
–20 –15 –10 –5 0 5 10 15 20 25
3 45-
INPUT VOLTAGE (V)
945 09
INPUT VOLTAGE (V)
099 Figure 9. Input Overvoltage Performance, G = 1 Figure 12. Input Overvoltage Performance, G = 100, VS = ±15 V
3 0.6 15 VS = ±15V G = 1 VOUT –1.0V, +12.3V 0.0V, +12.8V +1.0V, +12.3V 2 0.4 10 E (V) G ) I ) A IN T 5 (V A 1 0.2 L E m G ( NT E VO 0 LTA E D O 0 0 O MAXIMUM V V -M DIFF = ±1V T N U CURR –5 O TP UT –1 –0.2 U P MM O IN O –10 C T –2 –0.4 PU –1.0V, –14.6V +1.0V, –14.6V IN –15 0.0V, –15.1V –3 –0.6 –20 –20 –15 –10 –5 0 5 10 15 20 25
10 3
–1.2 –1.0 –0.8 –0.6 –0.4 –0.2 0 0.2 0.4 0.6 0.8 1.0 1.2
13 3 45- 45-
INPUT VOLTAGE (V)
099
OUTPUT VOLTAGE (V)
099 Figure 10. Input Overvoltage Performance, G = 1, VS = ±15 V Figure 13. Input Common-Mode Voltage vs. Output Voltage, G = 1, VS = ±15 V
6 0.5 3.0 VOUT ) 5 0.4 V 2.5 ( +4mV, +2.8V E G +1.0V, +2.3V ) IIN A T 2.0 (V A) 4 0.3 L E O G (m A V NT 1.5 LT DE O 3 0.2 O RRE M MAXIMUM VDIFF = ±1V T V N- U CU V 1.0 S = 5V O TP G = 100 UT M 2 0.1 U M O V–IN = 0V INP 0.5 V +1.0V, +0.4V REF = 0V CO UT +4mV, –0.1V 1 0 INP 0 0 –0.1
1
–0.5 –5 0 5 10 15 20 25 30 35 40
14 -31
–0.2 0 0.2 0.4 0.6 0.8 1.0 1.2
3
INPUT VOLTAGE (V)
945 45- 09
OUTPUT VOLTAGE (V)
099 Figure 11. Input Overvoltage Performance, G = 100 Figure 14. Input Common-Mode Voltage vs. Output Voltage, G = 1, VS = 5 V, VREF = 0 V Rev. A | Page 10 of 26 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 ARCHITECTURE SETTING THE GAIN GAIN ACCURACY INPUT VOLTAGE RANGE INPUT PROTECTION Input Voltages Beyond the Rails Large Differential Input Voltage LAYOUT Common-Mode Rejection Ratio over Frequency Power Supplies Reference DRIVING THE REFERENCE PIN INPUT BIAS CURRENT RETURN PATH RADIO FREQUENCY INTERFERENCE (RFI) OUTPUT BUFFERING APPLICATIONS INFORMATION AD8420 IN ELECTROCARDIOGRAPHY (ECG) CLASSIC BRIDGE CIRCUIT 4 mA TO 20 mA SINGLE-SUPPLY RECEIVER OUTLINE DIMENSIONS ORDERING GUIDE