Datasheet

AD8494/AD8495/AD8496/AD8497
Rev. C | Page 7 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, +V
S
= 5 V, R
L
= ∞, unless otherwise noted.
100
10
1
0.1
0.01
0.1 1 10 100 1k 10k 100k
FREQUENCY (Hz)
CMRR (°C/V)
08529-035
AD8495/AD8497
AD8494
AD8496
Figure 3. CMRR vs. Frequency
1000
100
10
1
0
1 10 100 1k 10k 100k
FREQUENCY (Hz)
PSRR (°C/V)
08529-036
AD8495/AD8497
AD8494
AD8496
Figure 4. PSRR vs. Frequency
50
40
30
20
10
0
–10
–20
100 1k 10k 100k 1M
FREQUENCY (Hz)
GAIN (dB)
08529-018
AD8494
AD8496
AD8495/AD8497
Figure 5. Frequency Response
1200
1000
800
600
400
200
0
–200
TIME (50µs/DIV)
TEMPERATURE READING (°C)
08529-019
CONNECTED
THERMOCOUPLE
OPEN THERMOCOUPLE
THERMOCOUPLE CONNECTION
AD849x OUTPUT
Figure 6. Output Response to Open Thermocouple,
−IN Connected to Ground Through a 1 MΩ Resistor
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–0.5 0.5 1.5 2.5 3.5 4.5 5.5
OUTPUT VOLTAGE (V)
INPUT COMMON-MODE VOLTAGE (V)
08529-017
+0.05, +3.45
+0.05, +3.21
+4.91, +2.95
+4.91, +2.71
+0.05, –0.36
+0.05, –0.39
+4.91, –0.37
+4.91, –0.39
V
REF
= 0V
V
REF
= 2.5V
Figure 7. Input Common-Mode Voltage Range vs. Output Voltage,
+V
S
= 5 V, V
REF
= 0 V, and V
REF
= 2.5 V
35
30
25
20
15
10
5
40
0
1.75
1.50
1.25
1.00
0.75
0.50
0.25
2.00
0
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
INPUT BIAS CURRENT (nA)
INPUT OFFSET CURRENT (nA)
08529-042
I
BIAS
I
OS
Figure 8. Input Bias Current and Input Offset Current vs. Temperature