- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16959 > ADA4851-4YRU-EBZ (Analog Devices Inc)BOARD EVAL FOR ADA4851-4YRU PDF資料下載
參數(shù)資料
| 型號(hào)： | ADA4851-4YRU-EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR ADA4851-4YRU |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 每 IC 通道數(shù)： | 4 - 四 |
| 放大器類型： | 電壓反饋 |
| 板類型： | 裸（未填充） |
| 已供物品： | 板 |
| 已用 IC / 零件： | 14-TSSOP 封裝 |
ADA4851-1/ADA4851-2/ADA4851-4
Rev. J | Page 19 of 24
SINGLE-SUPPLY VIDEO AMPLIFIER
An example of an 8 MHz, three-pole, Sallen-Key, low-pass,
video reconstruction filter is shown in Figure 46. This circuit
features a gain of 3, has a 0.1 dB bandwidth of 8.2 MHz, and
over 17 dB attenuation at 27 MHz (see Figure 47). The filter has
three poles; two are active with a third passive pole (R6 and C4)
placed at the output. C3 improves the filter roll-off. R6, R7, and
R8 comprise the video load of 150 Ω. Components R6, C4, R7,
R8, and the input termination of the network analyzer form a
12.8 dB attenuator; therefore, the reference level is roughly
3.3 dB, as shown in Figure 47.
The ADA4851 family of amplifiers is well suited for portable
video applications. When operating in low voltage single-supply
applications, the input signal is limited by the input stage
headroom. For additional information, see the Headroom
Considerations section. Table 6 shows the recommended values
for voltage, input signal, various gains, and output signal swing
for the typical video amplifier shown in Figure 45.
75
Ω CABLE
VOUT
75
Ω
75
Ω
VIN
V
′
RG
RF
+VS
PD
U1
C1
2.2
μF
C2
0.01
μF
05143-
059
+
R2
47
IOUT
R3
125
R6
6.8
+3V
R7
68.1
R1
37.4
C1
51pF
C3
6.8pF
C4
1nF
R4
2k
R5
1k
R8
75
VOUT
C2
51pF
VIDEO DAC
05
14
3-
06
1
Figure 45. Video Amplifier
Table 6. Recommended Values
Supply
Voltage
(V)
Input
Range
(V)
RG
(kΩ)
RF
(kΩ)
Gain
(V/V)
V’
(V)
Figure 46. 8 MHz Video Reconstruction Filter Schematic
VOUT
(V)
05
143
-06
2
1: –3.3931dB
8.239626MHz
5dB/REF –15dB
0.03
0.1
1
10
100
1
FREQUENCY (MHz)
3
0 to 0.8
1
2
1.6
0.8
3
0 to 0.8
0.499
1
3
2.4
1.2
5
0 to 2.8
1
2
4.9
2.45
VIDEO RECONSTRUCTION FILTER
At higher frequencies, active filters require wider bandwidths to
work properly. Excessive phase shift introduced by lower frequency
op amps can significantly affect the filter performance.
A common application for active filters is at the output of video
DACs/encoders. The filter, or more appropriately, the video
reconstruction filter, is used at the output of a video DAC/
encoder to eliminate the multiple images that are created during
the sampling process within the DAC. For portable video appli-
cations, the ADA4851 family of amplifiers is an ideal choice due
to its lower power requirements and high performance.
Figure 47. Video Reconstruction Filter Frequency Performance
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VE-JTK-EY | CONVERTER MOD DC/DC 40V 50W |
| ADA4860-1YRJ-EBZ | BOARD EVAL FOR ADA4860-1YRJ |
| RYM08DTBN | CONN EDGECARD 16POS R/A .156 SLD |
| GBM24DRAI | CONN EDGECARD 48POS R/A .156 SLD |
| VE-JT0-EY | CONVERTER MOD DC/DC 5V 50W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4851-4YRUZ | 功能描述:IC OPAMP VF R-R QUAD LP 14TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:- 轉(zhuǎn)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(yīng)商設(shè)備封裝:8-SO 包裝:管件 |
| ADA4851-4YRUZ-R7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost, High Speed, Rail-to-Rail Output Op Amps |
| ADA4851-4YRUZ-RL | 功能描述:IC OPAMP VF R-R QUAD LP 14TSSOP 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):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
| ADA4851-4YRUZ-RL7 | 功能描述:IC OPAMP VF R-R QUAD LP 14TSSOP 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):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
| ADA4853-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power, Rail-to-Rail Output, Video Op Amps with Ultralow Power |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。