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參數(shù)資料
| 型號(hào)： | AD841SQ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP 40MHZ 50MA 14CDIP |
| 標(biāo)準(zhǔn)包裝： | 25 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 300 V/µs |
| 增益帶寬積： | 40MHz |
| 電流 - 輸入偏壓： | 3.5µA |
| 電壓 - 輸入偏移： | 500µV |
| 電流 - 電源： | 11mA |
| 電流 - 輸出 / 通道： | 50mA |
| 電壓 - 電源，單路/雙路(±)： | ±5 V ~ 18 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 14-CDIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 14-CERDIP |
| 包裝： | 管件 |
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AD841
Data Sheet
Rev. C | Page 12 of 16
TERMINATED LINE DRIVER
The AD841 functions very well as a high speed line driver of
either terminated or unterminated cables. Figure 33 shows the
AD841 driving a doubly terminated cable in a follower config-
uration. The AD841 maintains a typical slew rate of 300 V/s,
which means it can drive a ±10 V, 4.7 MHz signal or a ±3 V,
15.9 MHz signal.
The termination resistor, RT, (when equal to the characteristic
impedance of the cable) minimizes reflections from the far end
of the cable. A back-termination resistor, RBT, (also equal to the
characteristic impedance of the cable) may be placed between
the AD841 output and the cable to damp any stray signals
caused by a mismatch between RT and the cable’s characteristic
impedance. This results in a cleaner signal, but because half the
output voltage is dropped across RBT, the op amp must supply
double the output signal required if there is no back termina-
tion. Therefore, the full power bandwidth is cut in half.
If termination is not used, cables appear as capacitive loads. If
this capacitive load is large, it should be decoupled from the
AD841 by a resistor in series with the output (see Figure 32).
Figure 33. Line Driver Configuration
OVERDRIVE RECOVERY
Figure 34 shows the overdrive recovery capability of the AD841.
Typical recovery time is 200 ns from negative overdrive and
700 ns from positive overdrive.
Figure 34. Overdrive Recovery
Figure 35. Overdrive Recovery Test Circuit
11
6
4
5
10
–
+
AD841
+VS
–VS
2.2F
0.1F
2.2F
0.1F
TERMINATION
RESISTOR
FOR INPUT
SIGNAL
RB
100
VIN
RBT
(OPTIONAL)
RT
VOUT
50 OR
75 CABLE
RT = RBT = CABLE CHARACTERISTIC IMPEDANCE
1
1340-
033
100
90
10
0%
10V
200ns
1V
OVERDRIVEN
OUTPUT: 10V/DIV
INPUT SQUARE
WAVE: 1V/DIV
1
1340-
034
11
6
4
5
10
–
+
AD841
+VS
–VS
2.2F
0.1F
2.2F
0.1F
OUTPUT
1k
50
HP3314A
PULSE GENERATOR
OR EQUIVALENT
1s ± 1V SQUARE
WAVE INPUT
1
1340-
035
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AD841SQ/883B | 功能描述:高速運(yùn)算放大器 FAST SETTLING H.S. OP AMP RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 產(chǎn)品: |
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| AD8420 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Noise, Low Gain Drift, G = 2000 |
| AD8420_12 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Wide Supply Range, Micropower, |
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