Datasheet AD8295 (Analog Devices) - 8

AD8295 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS NI NI T S + – V U 2 2 + O A A 6 5 4 3 1 1 1 1 PIN 1 –IN 1 INDICATOR 12 A2 OUT R 2 G 11 A1 +IN AD8295 R 3 G 10 A1 R1 TOP VIEW +IN 4 (Not to Scale) 9 A1 –IN 5 6 7 8 S F T 2 V E U R
17
– R
-0
O 1 A
43
1
73
A
0 Figure 2. Pin Configuration
Table 8. Pin Function Descriptions Pin No. Mnemonic Description
1 −IN In-Amp Negative Input. 2, 3 RG In-Amp Gain-Setting Resistor Terminals. 4 +IN In-Amp Positive Input. 5 −VS Negative Supply. 6 REF In-Amp Reference Terminal. Drive with a low impedance source. Output is referred to this pin. 7 A1 OUT Op Amp A1 Output. 8 A1 R2 Resistor R2 Terminal. Connected internally to Op Amp A1 inverting input. 9 A1 −IN Op Amp A1 Inverting Input. Midpoint of resistor divider. 10 A1 R1 Resistor R1 Terminal. Connected internally to Op Amp A1 inverting input. 11 A1 +IN Op Amp A1 Noninverting Input. 12 A2 OUT Op Amp A2 Output. 13 A2 −IN Op Amp A2 Inverting Input. 14 A2 +IN Op Amp A2 Noninverting Input. 15 OUT In-Amp Output. 16 +VS Positive Supply. Rev. A | Page 8 of 28 Document Outline FEATURES APPLICATIONS CONNECTION DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS INSTRUMENTATION AMPLIFIER SPECIFICATIONS, SINGLE-ENDED AND DIFFERENTIAL OUTPUT CONFIGURATIONS OP AMP SPECIFICATIONS INTERNAL RESISTOR NETWORK POWER AND TEMPERATURE SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL CHARACTERISTICS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS IN-AMP OP AMPS SYSTEM THEORY OF OPERATION UNCOMMITTED OP AMPS INSTRUMENTATION AMPLIFIER Gain Selection Common-Mode Input Voltage Range Reference Terminal LAYOUT Routing and Vias Common-Mode Rejection over Frequency Unused Op Amps Reference Power Supplies INPUT PROTECTION INPUT BIAS CURRENT RETURN PATH RF INTERFERENCE DIFFERENTIAL OUTPUT APPLICATIONS INFORMATION CREATING A REFERENCE VOLTAGE AT MIDSCALE HIGH ACCURACY G = −1 CONFIGURATION WITH LOW-PASS FILTER TWO-POLE SALLEN-KEY FILTER AC-COUPLED INSTRUMENTATION AMPLIFIER DRIVING DIFFERENTIAL ADCs OUTLINE DIMENSIONS ORDERING GUIDE