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PDF ML6420 Data sheet ( Hoja de datos )
| Número de pieza | ML6420 | |
| Descripción | Triple/Dual Phase-Equalized / Low-Pass Video Filter | |
| Fabricantes | Micro Linear | |
| Logotipo |  |
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September 1999
PRELIMINARY
ML6420*
Triple/Dual Phase-Equalized, Low-Pass Video Filter
GENERAL DESCRIPTION
The ML6420 monolithic BiCMOS 6th-order filters provide
fixed frequency low pass filtering for video applications.
These triple output phase-equalized filters are designed for
input anti-aliasing filtering.
Cut-off frequencies are either 3.0, 5.5, 8.0, or 9.3MHz.
Each channel incorporates a 6th-order low-pass filter, a
first order all-pass filter, and a 75W coax cable driver. A
control pin (Range) is provided to allow the inputs to
swing to ground by providing a 0.5V offset to
the input.
The filters are powered from a single 5V supply, and can
drive 1VP-P over 75W (0.5V to 1.5V), or 2VP-P over 150W
(0.5V to 2.5V).
ML 6420 BLOCK DIAGRAM
VCCB
8
VINA 15
3k
1k
BUF
IBIAS
VCCC
6
LOW PASS
A
FEATURES
s 3.0, 5.5, 8.0, or 9.3 MHz bandwidth
s 1X or 2X gain
s 6th-order filter with equalizer
s >40dB stopband rejection
s No external components or clocks
s ±10% maximum frequency accuracy over supply
and temperature
s <2% differential gain, <2° differential phase
s <25ns group delay variation
W Ws Drives 1VP-P into 75 , or 2VP-P into 150
s 5V ±10% operation
s ML6420 available with 6dB gain
* Some Packages Are End Of Life
VCC
5
ALL PASS
A
VCCA
11
1X/2X
BUF
10 VOUTA
3.33K
VINB 16
3k
1k
VINC 2
3k
RANGE 14 1k
BUF
IBIAS
BUF
IBIAS
12
GND
LOW PASS
B
LOW PASS
C
13
GNDA
ALL PASS
B
ALL PASS
C
4
GNDC
1X/2X
BUF
9 VOUTB
3.33K
1X/2X
BUF
7 VOUTC
3.33K
1
GNDB
3
GND
FILTER A
FILTER B
FILTER C
ML6420-1
5.5MHZ
5.5MHZ
5.5MHZ
1X GAIN
ML6420-3
8.0MHZ
8.0MHZ
8.0MHZ
ML6420-4
8.0MHZ
3.0MHZ
3.0MHZ
2X GAIN
ML6420-5 ML6420-7
5.5MHZ
2.5MHZ
2.5MHZ
9.3MHZ
9.3MHZ
9.3MHZ
Triple Input/Anti-aliasing Video Filter
1
1 page  
ELECTRICAL CHARACTERISTICS (Continued)
ML6420
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
5.50MHZ FILTER – ML6420-5
Bandwidth (monotonic passband)
–3dB (Note 5)
4.95 5.50 6.05 MHz
Attenuation
Output Noise
Group Delay
fIN = 10MHz
fIN = 50MHz
BW = 30MHz
20 25
45 55
170
dB
dB
1 mVRMS
ns
Small Signal Gain
VIN = 100mVP-P at 100kHz,
Filter A or C
5.5 6 6.5 dB
CV Composite Small Signal Gain
9.3MHZ FILTER – ML6420-7
VINA, C = 100mVP-P at 100kHz
11 12 13 dB
Bandwidth (monotonic passband)
–3dB (Note 5)
8.4 9.3 10.2 MHz
Attenuation
Output Noise
Group Delay
fIN = 17MHz
fIN = 85MHz
BW = 30MHz
20 25
45 55
100
dB
dB
1 mVRMS
ns
DIGITAL AND DC
VIL Logic Input Low
VIH Logic Input High
IIL Logic Input Low
IIL Logic Input High
ICC Supply Current RL = 75W
RANGE
RANGE
VIN = GND
VIN = VCC
VIN = 0.5V (Note 4)
VIN = 1.5V
VCC – 0.8
–1
110
150
0.8 V
V
µA
1 µA
135 mA
175 mA
Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions.
WNote 2: Maximum resistance on the outputs is 500 in order to improve step response.
Note 3: Connect all ground pins to the ground plane via the shortest path.
´Note 4: Power dissipation PD = (ICC VCC) – [3 (VOUT2/RL)]
Note 5: The bandwidth is the –3dB frequency of the unboosted filter. This represents the attenuation that results from boosting the gain from -3dB point at the
specified frequency.
5
5 Page 
10
0
–10
–20
–30
–30
–40
–50
–60
–70
–80
–90
100k
1M
10M
100M
FREQUENCY (Hz)
Figure 1A. Stop-Band Amplitude vs Frequency
(fC = 5.5MHz). ML6420
Note: Figure 1, 2 and 3 data was measured using the test circuit in Figure 6.
+1
+0.25
0
–0.5
–1.25
–2.0
–2.75
–3.5
–4.25
–5.0
–5.75
–6.5
100k 1M 10M
FREQUENCY (Hz)
Figure 2A. Pass-Band Amplitude vs Frequency
(fC = 5.5MHz). ML6420
ML6420-1
ML6420
ML6420-5
2M 7M
FREQUENCY (Hz)
Figure 3A. Group Delay vs Frequency (fC = 5.5MHz).
ML6420
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ML6420.PDF ] | |
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