ML6420 Datasheet, PDF (1/20 Pages) Micro Linear Corporation – Triple/Dual Phase-Equalized, Low-Pass Video Filter

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 1V_P-P over 75W (0.5V to 1.5V), or 2V_P-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 W s Drives 1V_P-P into 75 , or 2V_P-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