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參數資料
| 型號： | AD8031A |
| 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： | 15/16頁 |
| 文件大小： | 247K |
| 代理商： | AD8031A |
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PDF資料 |
PDF描述 |
|---|---|
| AD8031AN | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031AR | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031AR-REEL7 | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031ART-REEL | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031ART-REEL7 | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8031AN | 制造商:Rochester Electronics LLC 功能描述:PDIP SINGLE LOW POWER OP AMP - Bulk 制造商:Analog Devices 功能描述:IC SM AMP LOW POWER RRI/O |
| AD8031ANZ | 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:- 產品培訓模塊:Differential Circuit Design Techniques for Communication Applications 標準包裝:1 系列:- 放大器類型:RF/IF 差分 電路數:1 輸出類型:差分 轉換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應商設備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
| AD8031ANZ | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD8031AR | 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:- 標準包裝:100 系列:- 放大器類型:通用 電路數:1 輸出類型:- 轉換速率:0.2 V/µs 增益帶寬積:- -3db帶寬:- 電流 - 輸入偏壓:100pA 電壓 - 輸入偏移:30µV 電流 - 電源:380µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):±2 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SO 包裝:管件 |
| AD8031AR-EBZ | 功能描述:BOARD EVAL FOR AD8031AR RoHS:是 類別:編程器，開發系統 >> 評估板 - 運算放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
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