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AD8032ANZ 데이터 시트보기 (PDF) - Analog Devices

부품명AD8032ANZ ADI
Analog Devices ADI
상세내역2.7 V, 800 μA, 80 MHz Rail-to-Rail I/O Amplifiers
AD8032ANZ Datasheet PDF : 20 Pages
First Prev 11 12 13 14 15 16 17 18 19 20
Figure 50 and Figure 51 show the output signal swing and
frequency spectrum at 500 kHz. At this frequency, the output
signal (at VOUT), which has a peak-to-peak swing of 1.95 V
(50 mV to 2 V), has a THD of −68 dB (SFDR = −77 dB).
100
90
2V
10
0%
50mV
0.5V
1µs
Figure 50. Output Signal Swing of Low Distortion Line Driver at 500 kHz
+9dBm
AD8031/AD8032
This circuit could also be used to drive the analog input of a
single-supply, high speed ADC whose input voltage range is
referenced to ground (for example, 0 V to 2 V or 0 V to 4 V). In
this case, a back termination resistor is not necessary (assuming
a short physical distance from transistor to ADC); therefore, the
emitter of the external transistor would be connected directly to
the ADC input. The available output voltage swing of the circuit
would therefore be doubled.
1.5V
100
90
10
0%
50mV
0.2V
200ns
Figure 52. Output Signal Swing of Low Distortion Line Driver at 2 MHz
+7dBm
START 0Hz
STOP 5MHz
Figure 51. THD of Low Distortion Line Driver at 500 kHz
Figure 52 and Figure 53 show the output signal swing and
frequency spectrum at 2 MHz. As expected, there is some
degradation in signal quality at the higher frequency. When the
output signal has a peak-to-peak swing of 1.45 V (swinging
from 50 mV to 1.5 V), the THD is −55 dB (SFDR = −60 dB).
START 0Hz
STOP 20MHz
Figure 53. THD of Low Distortion Line Driver at 2 MHz
Rev. C | Page 17 of 20
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