- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363776 > OPA3684IDR Operational Amplifier PDF資料下載
參數(shù)資料
| 型號(hào)： | OPA3684IDR |
| 英文描述： | Operational Amplifier |
| 中文描述： | 運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 14/25頁(yè) |
| 文件大?。?/td> | 448K |
| 代理商： | OPA3684IDR |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)當(dāng)前第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)
OPA3684
SBOS241A
14
www.ti.com
LOW-POWER RGB MUX/LINE DRIVER
Using the shutdown feature, two OPA3684
’
s can provide an
easy low-power way to select one of two possible RGB
sources for moderate resolution monitors. Figure 6 shows a
recommended circuit where each of the color outputs are
combined in a way that provides a net gain of 1 to the
matched 75
load with a 75
output impedance. This brings
the two outputs for each color together through a 78.7
resistor with a slightly > 2 gain provided by the amplifiers.
When one channel is shutdown, the feedback network is still
present, slightly attenuating the signal and combining in
parallel with the 78.7
to give a 75
source impedance.
Since the OPA3684 does not disable quickly, this approach
is not suitable for pixel-by-pixel multiplexing
—
however, it
does provide an easy way to switch between two possible
RGB sources. The output swing provided by the active
channel will divide back through the inactive channel feed-
back to appear at the inverting input of the OFF channel. To
retain good pulse fidelity, or low distortion, this divided down
output signal at the inverting inputs of the OFF channels, plus
the OFF channel input signals, should not exceed 0.7Vp-p.
As the signal across the buffers of the inactive channels
exceeds 0.7Vp-p, diodes across the inputs begin to turn on
causing a nonlinear load to the active channel. This will
degrade signal purity under those conditions.
LOW-POWER, FLEXIBLE GAIN, DIFFERENTIAL
RECEIVER
The 3 channels available in the OPA3684 can be applied to
a very flexible differential to single-ended receiver. Since the
bandwidth does not depend on the gain setting, the gain
setting element of Figure 7 (R
G
) can be adjusted over a wide
range with minimal impact on resulting bandwidth. Fre-
quency-response shaping elements may be included in R
G
as well to provide line equalization or filtering in the final
output signal.
1/3
OPA3684
681
806
75
78.7
V
OUT
Red
75
Line
R1
+5V
+5V
–
5V
1/3
OPA3684
681
806
75
78.7
V
OUT
Green
75
Line
G1
1/3
OPA3684
681
806
75
78.7
V
OUT
Blue
75
Line
B1
1/3
OPA3684
681
806
75
78.7
R2
+5V
–
5V
1/3
OPA3684
681
806
75
78.7
G2
1/3
OPA3684
681
806
75
78.7
B2
V
DIS
U1
U2
Power Supply
De-Coupling Not Shown
R
G
High-Speed INA (>120MHz)
806
806
806
806
1/3
OPA3684
1/3
OPA3684
1/3
OPA3684
V
1
(1 + 2(806
)/R
G
) (V
1
–
V
2
)
V
2
+5
–
5
+5
–
5
+5
–
5
402
402
The first two amplifiers provide the differential gain function
with a common-mode gain of 1. The second amplifier per-
forms the differencing function to remove the common-mode
(referencing the output to ground if the 402
resistor is
grounded) and providing a differential gain of 1. The resistors
have been scaled to provide the same output loading on
each first stage amplifier. Typical bandwidths for the circuit of
Figure 7 exceed 120MHz.
FIGURE 6. Wideband 2x1 RGB Multiplexer.
FIGURE 7. Low-Power, Wide Gain Range, Differential Receiver.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPA3690ID | OP-AMP|TRIPLE|BIPOLAR|SOP|16PIN|PLASTIC |
| OPA3690IDBQR | 1MHZ 128K I2C SERIAL EEPROM, -40C to +85C, 8-MSOP, T/R |
| OPA3690IDBQT | OP-AMP|TRIPLE|BIPOLAR|SSOP|16PIN|PLASTIC |
| OPA3690IDR | OP-AMP|TRIPLE|BIPOLAR|SOP|16PIN|PLASTIC |
| OPA3691ID | Current-Feedback Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA3684IDRG4 | 功能描述:高速運(yùn)算放大器 Low-Power Triple Current Feedback 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 |
| OPA369 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.8V, 700nA, Zer?-Crossover RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER |
| OPA369_1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.8V, 700nA, Zer?-Crossover RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER |
| OPA3690 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Dual, Wideband, High Output Current, Operational Amplifier with Current Limit |
| OPA3690ID | 功能描述:高速運(yùn)算放大器 Triple Wideband Voltage-Feedback 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。