AD8497 AD [Analog Devices], AD8497 Datasheet - Page 7

• Manufacturer Part Number: AD8497
• Description: Precision Thermocouple Amplifiers with Cold Junction Compensation
• Manufacturer: AD [Analog Devices]

TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, +V
1000
0.01
100
100
–10
–20
0.1
10
10
50
40
30
20
10
1
1
0
0
100
0.1
1
AD8495/AD8497
AD8494
AD8496
AD8495/AD8497
AD8494
AD8496
S
= 5 V, R
1
AD8494
AD8496
AD8495/AD8497
10
Figure 5. Frequency Response
Figure 3. CMRR vs. Frequency
Figure 4. PSRR vs. Frequency
1k
L
10
= ∞, unless otherwise noted.
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
100
100
10k
1k
1k
100k
10k
10k
100k
100k
1M
Rev. 0 | Page 7 of 16
Figure 8. Input Bias Current and Input Offset Current vs. Temperature
Figure 7. Input Common-Mode Voltage Range vs. Output Voltage,
40
35
30
25
20
15
10
5
0
–0.5
–1.0
–40
1200
1000
–200
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
800
600
400
200
–0.5
0
0
−IN Connected to Ground Through a 1 MΩ Resistor
Figure 6. Output Response to Open Thermocouple,
+0.05, +3.45
AD8494/AD8495/AD8496/AD8497
–20
+0.05, –0.39
THERMOCOUPLE
+0.05, +3.21
+0.05, –0.36
THERMOCOUPLE CONNECTION
AD849x OUTPUT
CONNECTED
0.5
+V
0
S
= 5 V, V
TEMPERATURE (°C)
20
1.5
OUTPUT VOLTAGE (V)
REF
TIME (50µs/DIV)
= 0 V, and V
40
V
V
I
REF
REF
BIAS
I
2.5
OS
= 0V
= 2.5V
60
OPEN THERMOCOUPLE
REF
3.5
80
= 2.5 V
+4.91, –0.37
+4.91, +2.71
+4.91, –0.39
100
+4.91, +2.95
4.5
120
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
5.5