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參數(shù)資料
| 型號(hào)： | MAX4090 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current |
| 中文描述： | 3V/5V、6dB視頻緩沖器，具有同步頭鉗位和150nA關(guān)斷電流 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大小： | 651K |
| 代理商： | MAX4090 |
M
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
_______________________________________________________________________________________
9
R1 = R2
(
)
C1
(p f
L1
(μH)
R
IS
(
)
3dB
BW
(MHz)
A T T EN U A T O N
AT 27MHz
(dB)
75
150
200
300
330
150
120
82
1.8
3.9
4.7
8.2
0
50
50
100
8.7
9.0
9.3
8.7
20
20
22
20
Table 2. Bench Measurement Values
Rn1 = Rn2
(
)
Cn1 (F)
Cn2 (F)
Cn3 (F)
Ln1 (H)
1
0.923
0.923
0.06
1.846
Table 3. 3rd-Order Butterworth Lowpass
Filter Normalized Values
R2
150
R1
150
C1
120pF
C2
120pF
L1
4.7
μ
H
C3
6.8pF
C4
0.1
μ
F
R3
75
C7
1
μ
F
IN
OUT
GND
FB
SHDN
V
CC
V
CC
V
CC
V
OUT
4
2
3
5
6
1
VIDEO
CURRENT
DAC
R
IS
49.9
3-POLE RECONSTRUCTION LPF
MAX4090
Figure 4. 3rd-Order Butterworth LPF with MAX4090
R1 = R2 (
)
C1 (pF)
C2 (pF)
C3 (pF)
L (μH)
R
IS
(
)
3dB BW (MHz)
ATTENUATION AT
27MHz (dB)
75
150
300
220
120
56
220
120
56
15.0
6.8
3.3
2.2
4.7
10.0
0
50
100
9.3
8.9
9.0
43
50
45
Table 4. Bench Measurement Values
Sag Correction
In a 5V application, the MAX4090 can use the sag con-
figuration if an AC-coupled output video signal is
required. Sag correction refers to the low-frequency
compensation for the highpass filter formed by the
150
load and the output capacitor. In video applica-
tions, the cutoff frequency must be low enough to pass
the vertical sync interval to avoid field tilt. This cutoff
frequency should be less than 5Hz, and the coupling
capacitor must be very large in normal configuration,
typically > 220μF. In sag configuration, the MAX4090
eliminates the need for large coupling capacitors, and
instead requires two 22μF capacitors (Figure 6) to
reach the same performance as the large capacitor.
Bench experiments show that increasing the output
coupling capacitor C5 beyond 47μF does not improve
the performance. If the supply voltage is less than 4.5V,
the sag correction is not recommended for the
MAX4090.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4090_05 | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current |
| MAX4090_09 | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:3V/5V, 6dB Video Buffer with Sync-Tip Clamp and 150nA Shutdown Current |
| MAX4090AALT | 制造商:Maxim Integrated Products 功能描述:3V/5V 6DB VIDEO BUFFER WITH SYNC-T - Rail/Tube |
| MAX4090AALT+ | 制造商:Maxim Integrated Products 功能描述:VID BFFR 6PIN UDFN - Rail/Tube |
| MAX4090AALT+T | 功能描述:視頻放大器 3V/5V 6dB Video Buff w/Sync-Tip Clamp RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類(lèi)型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
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