Datasheet AD8420 (Analog Devices) - 8

AD8420 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS AD8420 NC 1 8 VOUT +IN 2 + – 7 FB –IN 3 – + 6 REF –V TOP VIEW
-002
S 4 5 +VS (Not to Scale)
9945 0 Figure 2. Pin Configuration
Table 6. Pin Function Descriptions Pin No. Mnemonic Description
1 NC This pin is not connected internally. For best CMRR vs. frequency and leakage performance, connect this pin to negative supply. 2 +IN Positive Input. 3 −IN Negative Input. 4 −VS Negative Supply. 5 +VS Positive Supply. 6 REF Reference Input. 7 FB Feedback Input. 8 VOUT Output. Rev. A | Page 8 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