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參數(shù)資料
| 型號(hào)： | AD8031B |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| 中文描述： | 2.7伏，800微安，80 MHz的軌到軌輸入/輸出放大器 |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 247K |
| 代理商： | AD8031B |
AD8031/AD8032
–15–
REV. B
Figure 44 shows the AD8031 configured as a single supply gain-
of-2 line driver. With the output driving a back terminated 50
line, the overall gain from V
IN
to V
OUT
is unity. In addition to
minimizing reflections, the 50
back termination resistor pro-
tects the transistor from damage if the cable is short circuited.
The emitter follower, which is inside the feedback loop, ensures
that the output voltage from the AD8031 stays about 700 mV
above ground. Using this circuit, very low distortion is attain-
able even when the output signal swings to within 50 mV of
ground. The circuit was tested at 500 kHz and 2 MHz. Figures
45 and 46 show the output signal swing and frequency spectrum
at 500 kHz. At this frequency, the output signal (at V
OUT
),
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).
2V
50mV
10
0%
100
90
1
m
s
0.5V
Figure 45. Output Signal Swing of Low Distortion Line
Driver at 500 kHz
STOP 5MHz
V
START 0Hz
+9dBm
Figure 46. THD of Low Distortion Line Driver at 500 kHz
Figures 47 and 48 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).
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 (e.g., 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), so the emit-
ter of the external transistor would be connected directly to the
ADC input. The available output voltage swing of the circuit
would, therefore be doubled.
50mV
10
0%
100
90
200ns
0.2V
1.5V
Figure 47. Output Signal Swing of Low Distortion Line
Driver at 2 MHz
START 0Hz
STOP 20MHz
V
+7dBm
Figure 48. THD of Low Distortion Line Driver at 2 MHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8031BN | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031BR | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8032A | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8032AN | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8032AR | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8031BN | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O 制造商:Rochester Electronics LLC 功能描述:PDIP SINGLE LOW POWER OP AMP - Bulk |
| AD8031BNZ | 功能描述:IC OPAMP VF R-R LP LDIST 8DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD8031BR | 功能描述:IC OPAMP VF R-R LP LDIST 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
| AD8031BR-REEL | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O ±6V/12V 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:SOIC SINGLE LOW POWER OP AMP - Tape and Reel |
| AD8031BR-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O ±6V/12V 8-Pin SOIC N T/R |
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