Low Power Instrumentation Amplifier Specification Sheet

AD620
REV. E
–5–
Typical Characteristics
(@ +258C, V
S
= 615 V, R
L
= 2 kV, unless otherwise noted)
INPUT OFFSET VOLTAGE – mV
20
30
40
50
–40 0 +40 +80
PERCENTAGE OF UNITS
–80
SAMPLE SIZE = 360
10
0
Figure 3. Typical Distribution of Input Offset Voltage
INPUT BIAS CURRENT – pA
0
10
20
30
40
50
–600 0 +600
PERCENTAGE OF UNITS
–1200 +1200
SAMPLE SIZE = 850
Figure 4. Typical Distribution of Input Bias Current
10
20
30
40
50
–200 0 +200 +400
INPUT OFFSET CURRENT – pA
PERCENTAGE OF UNITS
–400
0
SAMPLE SIZE = 850
Figure 5. Typical Distribution of Input Offset Current
TEMPERATURE – 8C
INPUT BIAS CURRENT – nA
+I
B
–I
B
2.0
–2.0
175
–1.0
–1.5
–75
–0.5
0
0.5
1.0
1.5
1257525–25
Figure 6. Input Bias Current vs. Temperature
CHANGE IN OFFSET VOLTAGE – mV
1.5
0.5
WARM-UP TIME – Minutes
2
0
051
1
432
Figure 7. Change in Input Offset Voltage vs.
Warm-Up Time
FREQUENCY – Hz
1000
1
1 100k
100
10
10k1k100
VOLTAGE NOISE – nV/!Hz
GAIN = 1
GAIN = 10
10
GAIN = 100, 1,000
GAIN = 1000
BW LIMIT
Figure 8. Voltage Noise Spectral Density vs. Frequency,
(G = 1–1000)