AD548–Typical Characteristics
10
30
1500
INPUT BIAS CURRENT – pA
8
20
6
OPEN LOOP GAIN – V/mV
25
1250
R
L
= 10k
1000
I∆V
OS
I
–
µV
15
750
4
10
2
500
5
250
0
–10
0
–6
–2
2
6
10
COMMON-MODE VOLTAGE – V
0
10
20
30
40
50
60
70
0
–55
–25
5
35
65
95
125
WARM-UP TIME – Seconds
TEMPERATURE –
°C
Figure 7. Input Bias Current vs.
Common-Mode Voltage
100
80
PHASE
100
Figure 8. Change in Offset Voltage
vs. Warm-Up Time
120
Figure 9. Open Loop Gain vs.
Temperature
120
POWER SUPPLY REJECTION – dB
OPEN LOOP VOLTAGE GAIN – dB
80
PHASE IN DEGREES
110
100
80
60
40
20
0
–20
+SUPPLY
OPEN LOOP GAIN – dB
60
40
20
0
–20
–40
1k
10k
100k
FREQUENCY – Hz
1M
GAIN
60
40
20
0
–20
–40
10M
100
90
–SUPPLY
80
70
60
0
2
4
6
8 10 12 14
SUPPLY VOLTAGE –
±V
16
18
100
1k
10k
100k
FREQUENCY – Hz
1M
Figure 10. Open Loop Frequency
Response
90
80
Figure 11. Open Loop Voltage Gain
vs. Supply Voltage
22
20
Figure 12. PSRR vs. Frequency
10
10mV
OUTPUT VOLTAGE – V p-p
18
16
14
12
10
8
6
4
2
OUTPUT VOLTAGE SWING – V
1mV
5
70
CMRR – dB
60
50
40
30
0
–5
1mV
10mV
–10
20
1k
10k
100k
FREQUENCY – Hz
1M
0
10
100
1k
10k
100k
1M
0
2
4
6
8
FREQUENCY – Hz
SETTLING TIME – µs
Figure 13. CMRR vs. Frequency
4
Figure 14. Large Signal Frequency
Response
160
Figure 15. Output Swing and Error
Voltage vs. Output Settling Time
WHENEVER JOHNSON NOISE IS GREATER THAN
AMPLIFIER NOISE, AMPLIFIER NOISE CAN BE
CONSIDERED NEGLIGIBLE FOR APPLICATION
INPUT NOISE VOLTAGE – nV/√Hz
TOTAL HARMONIC DISTORTION – %
INPUT NOISE VOLTAGE – µV p-p
140
120
100
80
60
40
20
0
10
1
10,000
1kHz BANDWIDTH
RESISTOR JOHNSON
NOISE
FOLLOWER
WITH GAIN = 10
0.1
1,000
100
10
0.01
UNITY GAIN
FOLLOWER
0.001
100
1k
10k
FREQUENCY – Hz
100k
10Hz
BANDWIDTH
1
AMPLIFIER GENERATED NOISE
0
100k
1M
10M
100M
1G
10G
100G
100
1k
10k
100k
FREQUENCY – Hz
SOURCE IMPEDANCE –
Ω
Figure 16. Total Harmonic
Distortion vs. Frequency
Figure 17. Input Noise Voltage
Spectral Density
Figure 18. Total Noise vs. Source
Impedance
–4–
REV. C
AD [ ANALOG DEVICES ]
