Analog-devices AD620 Uživatelský manuál stáhnout pdf (Strana 6)

AD620–Typical Characteristics

FREQUENCY – Hz

1000

100

1000

100

CURRENT NOISE – fA/!Hz

Figure 9. Current Noise Spectral Density vs. Frequency

RTI NOISE – 2.0 mV/DIV

TIME – 1 SEC/DIV

Figure 10a. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1)

RTI NOISE – 0.1mV/DIV

TIME – 1 SEC/DIV

Figure 10b. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1000)

Figure 11. 0.1 Hz to 10 Hz Current Noise, 5 pA/Div

100

1000

AD620A

FET INPUT

IN-AMP

SOURCE RESISTANCE – V

TOTAL DRIFT FROM 258C TO 858C, RTI – mV

100,000

1k 10M

10,000

10k 1M100k

Figure 12. Total Drift vs. Source Resistance

FREQUENCY – Hz

CMR – dB

+160

+80

+40

+60

0.1

+140

+100

+120

100k10k1k10010

G = 1000

G = 100

G = 10

G = 1

+20

Figure 13. CMR vs. Frequency, RTI, Zero to 1 k

Ω

Source

Imbalance

REV. E

–6–

1 2 3 4 5 6 7 8 9 10 11 ... 15 16

Low Cost, Low Power 1
Instrumentation Amplifier 1
AD620–SPECIFICATIONS 2
WARNING! 4
Typical Characteristics 5
AD620–Typical Characteristics 6
OUTPUT VOLTAGE – Volts p-p 7
BW LIMIT 7
SETTLING TIME – ms 9
THEORY OF OPERATION 10
Figure 34. Make vs. Buy 11
Pressure Measurement 12
Medical ECG 12
(Operates on 1.8 mA 13
COMMON-MODE REJECTION 14
GROUNDING 14
Transformer Coupled Inputs 15
Thermocouple Inputs 15
OUTLINE DIMENSIONS 16
Plastic DIP (N-8) Package 16
Cerdip (Q-8) Package 16
SOIC (SO-8) Package 16

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Analog-devices AD620 Uživatelský manuál Strana 6

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