參數(shù)資料
型號: MAX4090ELT+T
廠商: Maxim Integrated Products
文件頁數(shù): 16/17頁
文件大小: 0K
描述: IC VIDEO BUFFER 6DB 6-UDFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
應(yīng)用: 緩沖器
電路數(shù): 1
-3db帶寬: 55MHz
轉(zhuǎn)換速率: 275 V/µs
電流 - 電源: 6.5mA
電流 - 輸出 / 通道: 85mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 6-WDFN
供應(yīng)商設(shè)備封裝: 6-uDFN(2x2)
包裝: 帶卷 (TR)
MAX4090
between 20
Ω to 100Ω is needed to isolate the input
capacitor (C4) to the filter to prevent the oscillation
problem.
Figure 2 shows the frequency response for R1 = R2 =
150
Ω. At 6MHz, the attenuation is about 1.4dB. The
attenuation at 27MHz is about 20dB. Figure 3 shows
the multiburst response for R1 = R2 = 150
Ω.
3rd-Order Butterworth Lowpass Filter Realization
If more flat passband and more stopband attenuation
are needed, a 3rd-order LPF can be used. The design
procedures are similar to the 2nd-order butterworth
LPF.
Table 3 shows the normalized 3rd-order butterworth
lowpass filter with the cutoff frequency at 1 rad/s and
the stopband frequency at 3 rad/s. Table 4 shows the
appropriated L and C values for different source/load
impedance and the bench measurement values for
-3dB BW and attenuation at 27MHz. The attenuation is
over 40dB at 27MHz. At 6MHz, the attenuation is
approximately 0.6dB for R1 = R2 = 150
Ω (Figure 5).
C
fR
L
LR
f
n
CL
nL
C
==
22
ππ
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
8
_______________________________________________________________________________________
0.1
1
10
100
FREQUENCY RESPONSE
FREQUENCY (MHz)
GAIN
(dB)
0
-60
-50
-40
-30
-20
-10
R2
150
Ω
R1
150
Ω
C1
150pF
L1
3.9
μH
C4
0.1
μF
R3
75
Ω
C7
1
μF
IN
OUT
GND
FB
SHDN
VCC
VOUT
VIDEO
CURRENT
DAC
RIS
49.9
Ω
2-POLE RECONSTRUCTION LPF
MAX4090
Figure 1. 2nd-Order Butterworth LPF with MAX4090
Figure 2. Frequency Response
VOUT
500mV/div
10
μs/div
VIN
500mV/div
Figure 3. Multiburst Response
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