+VS 7 COLD JUNCTION COMPENSATION +IN 8 6 IN-AMP –IN OUT 5 1 AD849x 2 REF 3 –VS SENSE 08529-001 THERMOCOUPLE AD849x 8 +IN 7 +VS –VS 3 6 OUT NC 4 5 SENSE REF 2 – + TOP VIEW (Not to Scale) NC = NO CONNECT 08529-002 –IN 1 REFERENCE JUNCTION PCB TRACES THERMOCOUPLE WIRE AD849x 08529-004 MEASUREMENT JUNCTION INSULATED EXPOSED 08529-007 GROUNDED +VS TEMPERATURE SENSOR COLD JUNCTION COMPENSATION +IN 5mV/°C IN-AMP G = 123.65 –IN OUT SENSE 08529-005 AD849x –VS REF SENSE ESD AND OVERVOLTAGE PROTECTION 10kΩ 50kΩ A2 COLD JUNCTION COMPENSATION A3 10kΩ +IN ESD AND OVERVOLTAGE PROTECTION OUT DIFF AMP G=5 A1 PRE-AMP AD8494/AD8496: G = 24.73 AD8495/AD8497: G = 19.34 50kΩ REF 08529-003 –IN REFERENCE JUNCTION KEEP JUNCTION AND AD849x AT SAME TEMPERATURE PCB TRACES WHEN USING ISOLATED THERMOCOUPLE TIPS AD849x 08529-010 MEASUREMENT JUNCTION KEEP TRACES SHORT THERMOCOUPLE WIRE RAILS HIGH WITH OPEN THERMOCOUPLE RAILS LOW WITH OPEN THERMOCOUPLE WHEN USING EXPOSED OR GROUNDED THERMOCOUPLE TIPS ELECTRICAL CONNECTION OCCURS AT TIP. VOLTAGE MUST STAY IN INPUT VOLTAGE RANGE OF AD849x. INCORRECT CORRECT WHEN THERMOCOUPLE TIP TYPE IS UNKNOWN REF AD849x REF V 10MΩ V + – 08529-006 AD8613 08529-008 AD849x R R C C AD849x RAILS HIGH WITH OPEN THERMOCOUPLE R AD849x RAILS LOW WITH OPEN THERMOCOUPLE FILTER FREQUENCY = 1 2πRC 08529-009 R 5V +VS 7 5V +VS COLD JUNCTION COMPENSATION 7 COLD JUNCTION COMPENSATION 8 6 IN-AMP –IN OUT +IN 5 1 AD849x 2 REF 3 –VS SENSE 8 6 IN-AMP –IN OUT 5 1 AD849x 2 REF 3 –VS SENSE 08529-013 +IN 08529-012 THERMOCOUPLE 3.20 3.00 2.80 8 3.20 3.00 2.80 1 5 5.15 4.90 4.65 4 PIN 1 IDENTIFIER 0.65 BSC 0.95 0.85 0.75 15° MAX 1.10 MAX 0.40 0.25 6° 0° 0.23 0.13 COMPLIANT TO JEDEC STANDARDS MO-187-AA 0.70 0.55 0.40 091709-A 0.15 0.05 COPLANARITY 0.10