IN-AMP
AD849x
+INTHERMOCOUPLE
–IN
OUT
SENSE
REF –VS
+VS
08529-001
COLD JUNCTION
COMPENSATION
8
2 3
6
7
15
08529-002
–IN 1
REF 2
–VS3
NC 4
+IN
8
+VS
7
OUT
6
SENSE
5
NC = NO CONNECT
+
–
AD849x
TOP VIEW
(Not to Scale)
08529-004
AD849x
PCB
TRACES
REFERENCE
JUNCTION
MEASUREMENT
JUNCTION
THERMOCOUPLE WIRE
08529-007
GROUNDED
EXPOSED
INSULATED
IN-AMP
G = 123.65
TEMPERATURE
SENSOR
COLD JUNCTION
COMPENSATION
5mV/°C
SENSE
AD849x
+IN
–IN
OUT
REF –VS
+VS
08529-005
+IN
–IN
OUT
REF
08529-003
A1
A2
A3
SENSE
ESD AND
OVERVOLTAGE
PROTECTION
ESD AND
OVERVOLTAGE
PROTECTION
AD8494/AD8496: G = 24.73
AD8495/AD8497: G = 19.34
PRE-AMP
10kΩ
10kΩ
50kΩ
DIFF AMP
G = 5
50kΩ
COLD JUNCTION
COMPENSATION
08529-010
AD849x
PCB
TRACES
KEEP
TRACES
SHORT
KEEP JUNCTION AND
AD849x AT SAME
TEMPERATURE
MEASUREMENT
JUNCTION REFERENCE
JUNCTION
THERMOCOUPLE WIRE
INCORRECT
V
CORRECT
AD849x
AD8613
+
–
V
08529-006
REF
AD849x
REF
08529-009
R
R
C
RAILS HIGH WITH OPEN
THERMOCOUPLE
R
R
C
RAILS LOW WITH OPEN
THERMOCOUPLE
FILTER FREQUENCY =
AD849x AD849x
1
2πRC
IN-AMP
AD849x
+INTHERMOCOUPLE
–IN
OUT
SENSE
REF –VS
+VS
5V
08529-012
COLD JUNCTION
COMPENSATION
8
2 3
6
7
15
IN-AMP
AD849x
+IN
–IN
OUT
SENSE
REF –VS
+VS
5V
08529-013
COLD JUNCTION
COMPENSATION
8
2 3
6
7
15
COMPLIANT TO JEDEC STANDARDS MO-187-AA
091709-A
6°
0°
0.70
0.55
0.40
4
8
1
5
0.65 BSC
0.40
0.25
1.10 MAX
3.20
3.00
2.80
COPLANARITY
0.10
0.23
0.13
3.20
3.00
2.80
5.15
4.90
4.65
PIN 1
IDENTIFIER
15° MAX
0.95
0.85
0.75
0.15
0.05