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參數(shù)資料
| 型號(hào)： | OPA2658UB |
| 元件分類(lèi)： | 運(yùn)算放大器 |
| 英文描述： | Dual Wideband, Low Power, Current Feedback OPERATIONAL AMPLIFIER |
| 中文描述： | 雙寬帶，低功耗，電流反饋運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 12/13頁(yè) |
| 文件大小： | 230K |
| 代理商： | OPA2658UB |
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12
OPA2658
DIFFERENTIAL GAIN AND PHASE
Differential Gain (dG) and Differential Phase (dP) are among
the more important specifications for video applications. dG
is defined as the percent change in closed-loop gain over a
specified change in output voltage level. dP is defined as the
change in degrees of the closed-loop phase over the same
output voltage change. Both dG and dP are specified at the
NTSC sub-carrier frequency of 3.58MHz and the PAL sub-
carrier of 4.43MHz. All NTSC measurements were per-
formed using a Tektronix model VM700A Video Measure-
ment Set.
dG/dP of the OPA2658 were measured with the amplifier in
a gain of +2V/V with 75
input impedance and the output
back-terminated in 75
. The input signal selected from the
generator was a 0V to 1.4V modulated ramp with sync pulse.
With these conditions the test circuit shown in Figure 9
delivered a 100IRE modulated ramp to the 75
input of the
video analyzer. The signal averaging feature of the analyzer
was used to establish a reference against which the perfor-
mance of the amplifier was measured. Signal averaging was
also used to measure the dg and dp of the test signal in order
to eliminate the generator’s contribution to measured ampli-
fier performance. Typical performance of the OPA2658 is
0.025% differential gain and 0.02
°
differential phase to both
NTSC and PAL standards.
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
1M
10M
100M
1G
Frequency (MHz)
C
G = +2
FIGURE 8. Channel-to-Channel Crosstalk.
FIGURE 9. Configuration for Testing Differential Gain/Phase.
SPICE MODELS
Computer simulation using SPICE is often useful when
analyzing the performance of analog circuits and systems.
This is particularly true for Video and RF amplifier circuits
where parasitic capacitance and inductance can have a major
effect on circuit performance. SPICE models are available
on a disk from the Burr-Brown Applications Department.
DEMONSTRATION BOARDS
Demonstration boards are available for each OPA2658 pack-
age style. These boards implement a very low parasitic
layout that will produce the excellent frequency and pulse
responses shown in the Typical Performance Curves. For
each package style, the recommended demonstration board
is:
DEMONSTRATION BOARD
PACKAGE
PRODUCT
DEM-OPA265xP
8-Pin DIP
OPA2658P
DEM-OPA265xU
SO-8
OPA2658U
OPA2658UB
DEM-OPA26xxE
MSOP-8
OPA2658E
75
75
402
402
75
75
TEK TSG 130A
TEK VM700A
OPA2658
Contact your local Burr-Brown sales office or distributor to
order demonstration boards.
TYPICAL APPLICATION
FIGURE 10. Low Distortion Video Amplifier.
OPA2658
V
OUT
402
402
Video
Input
75
75
75
Transmission Line
75
1/2
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| OPA2670IRGVR | 功能描述:高速運(yùn)算放大器 Sgl PortHi Out Crnt VDSL2 Line Driver 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 |
| OPA2670IRGVT | 功能描述:高速運(yùn)算放大器 Sgl PortHi Out Crnt VDSL2 Line Driver 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 |
| OPA2670IRGVT | 制造商:Texas Instruments 功能描述:IC OP-AMP 120MHZ 5000V/ VQFN-16 制造商:Texas Instruments 功能描述:IC, OP-AMP, 120MHZ, 5000V/ us, VQFN-16 |
| OPA2673IDGQ | 制造商:Texas Instruments 功能描述:OP AMP DUAL CURRENT FDBK 6.5V 10HTSSOP - Rail/Tube |
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