Datasheet ML6426CS-5, ML6426CS-4, ML6426CS-1, ML6426CS-15, ML6426CS-2 Datasheet (Micro Linear Corporation)
...Page 1
September 1999
PRELIMINARY
ML6426
High Bandwidth Triple Video Filters with Buffered
Outputs for RGB or YUV
GENERAL DESCRIPTION
The ML6426 are a family of triple video filters with
buffered outputs. There are several versions of the
ML6426, each with different passband cut-off frequencies
of 6.7MHz, 12MHz, 24MHz, 30MHz, 36MHz, and
48MHz. Each channel contains a 4th-order Butterworth
lowpass reconstruction video filter. The filter is optimized
for minimum overshoot and flat group delay and
guaranteed differential gain and phase at the outputs of
the integrated cable drivers.
All input signals from DACs are AC coupled into the
ML6426. All channels have DC restore circuitry to clamp
the DC input levels during video H-sync, using an output
feedback clamp. An external H-sync signal is required for
this purpose.
All outputs must be AC coupled into their loads. Each
output can drive 2V
have a gain of 2 (6dB) at 1V
into a 150W load. All channels
P-P
input levels.
P-P
FEATURES
■ 5V ±10% operation
■ RGB/YUV filters for ATSC Digital Television VESA
Standard
■ 2:1 Mux Inputs for multiple RGB/YUV inputs
■ Triple Reconstruction Filter options for 6.7, 12, 24, 30,
36, and 48MHz to handle various line rates
■ Multiple ML6426 outputs can be paralleled to drive
RGB/YUV outputs at different frequencies for various
line rates by means of Disable/Enable pin.
■ 6dB drivers and sync tip clamps for DC restore
■ DC restore with minimal tilt
■ 0.4% differential gain on all channels
0.4º differential phase on all channels
0.8% total harmonic distortion on all channels
■ 2kV ESD protection
BLOCK DIAGRAM
12
V
CCO
RINA/YINA
2
RINB/YINB
5
GINA/UINA
6
GIN/UINB
7
BINA/VINA
8
BINB/VINB
9
A/B MUX
1
SYNCIN
16
MUX
MUX
MUX
TRANSCONDUCTANCE
TRANSCONDUCTANCE
TRANSCONDUCTANCE
ERROR AMP
ERROR AMP
ERROR AMP
DISABLE
15
+
–
+
–
+
–
ML6426-1 ML6426-2 ML6426-3 ML6426-4 ML6426-5 ML6426-6
Filter A 6.7MHz 12MHz 24MHz 30MHz 36MHz 48MHz
Filter B 6.7MHz 12MHz 24MHz 30MHz 36MHz 48MHz
Filter C 6.7MHz 12MHz 24MHz 30MHz 36MHz 48MHz
0.5V
0.5V
0.5V
4
V
CC
4th-ORDER
4th-ORDER
4th-ORDER
FILTER A
FILTER B
FILTER C
GNDO
14
×2
×2
×2
GND
3
R
OUT/YOUT
G
OUT/UOUT
B
OUT/VOUT
13
11
10
1
Page 2
ML6426
PIN CONFIGURATION
PIN DESCRIPTION
ML6426
16-Pin Narrow SOIC (S16N)
A/B MUX
RINA/YINA
GND
V
CC
RINB/YINB
GINA/UINA
GINB/UINB
BINA/VINA
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
SYNC IN
DISABLE
GNDO
R
OUT/YOUT
V
CCO
G
OUT/UOUT
B
OUT/VOUT
BINB/VINB
PIN NAME FUNCTION
1A/B MUX Logic input pin to select between
Bank <A> and Bank <B> video inputs.
This pin is internally pulled high.
2RINA/YINA Unfiltered analog R- or Y-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
3 GND Analog ground
4V
CC
Analog 5V supply
5RINB/YINB Unfiltered analog R- or Y-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
6GINA/UINA Unfiltered analog G- or U-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
7GINB/UINB Unfiltered analog G- or U-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
PIN NAME FUNCTION
8BINA/VINA Unfiltered analog B- or V-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
9BINB/VINB Unfiltered analog B- or V-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
10 B
11 G
12 V
13 R
OUT
OUT
CCO
OUT
Analog B or V-channel output
Analog G or U-channel output
5V power supply for output buffers
Analog R or Y-channel output
14 GNDO Analog ground
15 DISABLE Disable/Enable pin. Turns the chip off
when logic high. Internally pulled low.
16 SYNC IN Input for an external H-sync logic
signal for filter channels. CMOS
level input. Active High.
2
November, 1999
Page 3
ABSOLUTE MAXIMUM RATINGS
ML6426
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional
Storage Temperature Range ..................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ..................... 260°C
Thermal Resistance (qJA).................................... 100°C/W
device operation is not implied.
OPERATING CONDITIONS
V
................................................................................ –0.3V to 7V
CC
Junction Temperature..............................................150°C
ESD ..................................................................... >2000V
Temperature Range ....................................... 0°C to 70°C
VCC Range ................................................... 4.5V to 5.5V
Analog and Digital I/O........... GND –0.3V to VCC + 0.3V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VCC = 5V±10%, TA = Operating Temperature Range (Note 1)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
GENERAL
I
CC
A
V
OUT
t
CLAMP
V
OS Peak Overshoot (R, G, B,) 2V
C
Supply Current No Load (VCC=5.5V) 52 80 mA
Low Frequency Gain (R, G, B) VIN= 100mV
V
at 100KHz 5.34 6.0 6.65 dB
P-P
Output Level during Sync (R, G, B,) DURING SYNC 0.7 0.9 1.1 V
Output Capability RL = 150W, AC-coupled@1MHz 2 VP-P
Clamp Response Time Settled to Within 10mV, CIN = 0.1µF 10 ms
Input Signal Dynamic Range (R, G, B,) AC Coupled 1.4 V
I
Output Pulse 4.3 %
P-P
Output Load Capacitance (R, G, B,) All Outputs 35 pF
L
Output Load Drive Capability, per Pin One Load is 150W 2 loads
(YUV or RGB Outputs)
P-P
dG Differential Gain (R, G, B,) All Outputs at fC/2 0.4 %
df Differential Phase (R, G, B,) All Outputs at fC/2 0.4 º
T
HD
PSRR PSRR (R, G, B,) 0.5V
I
SC
V
V
T
MUX
Output Distortion (R, G, B,) V
= 2V
OUT
(100kHz) at V
P-P
at 1 MHz 0.8 %
P-P
CC
35 dB
Output Short Circuit Current (R, G, B,) Note 2 120 mA
Input Voltage Logic High DISABLE, SYNC IN 2.5 V
IH
Input Voltage Logic Low DISABLE, SYNC IN 1.0 V
IL
Input Mux A/B Mux 2 µs
Data Valid Pin Valid
Time High or Low
6.7MHz FILTER: ML6426-1
f
1dB
f
0.8fc
f
f
–1dB Bandwidth Flatness (R, G, B,) 25ºC 4.0 4.8 MHz
–3dB Bandwidth Flatness (R, G, B,) 25ºC 6.0 6.7 7.3 MHz
c
0.8 x fC Attenuation 1.5 dB
StopBand Rejection (All Channels ³ 4 fC)fIN ³ 4 fC, Note 3 –38 –42 dB
SB
NOISE Output Noise (R, G, B,) Fullband 1.0 mV
X
TALK
Crosstalk Input of 0.5V
at 1 MHz –55 dB
P-P
Between any two Channels
RMS
X
TALK
A/B MUX Crosstalk Input of 0.5V
November, 1999
at 3.58/4.43MHz –54 dB
P-P
3
Page 4
ML6426
ELECTRICAL CHARACTERISTICS (Continued)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
6.7MHZ FILTER: ML6426-1 (continued)
T
PD
DT
Group Delay (R, G, B,) 100kHz 70 ns
Group Delay Deviation from Flatness to 3.58MHz 4.0 ns
PD
(R, G, B,) to 4.43MHz 8.0 ns
to 10MHz 9 ns
2MHz FILTER: ML6426-2
f
1dB
f
0.8fc
f
f
–1dB Bandwidth Flatness (R, G, B,) 25ºC 7.8 9.2 MHz
–3dB Bandwidth Flatness (R, G, B,) 25ºC 10.8 12 13.2 MHz
c
0.8 x fC Attenuation 1.2 dB
StopBand Rejection (All Channels ³ 4 fC)fIN ³ 4 fC, Note 3 –40 dB
SB
NOISE Output Noise (R, G, B,) Fullband 1 mV
X
TALK
Crosstalk Input of 0.5V
at 1 MHz –55 dB
P-P
Between any two Channels
X
T
DT
TALK
A/B MUX Crosstalk Input of 0.5V
Group Delay (R, G, B,) 100kHz 40 ns
PD
Group Delay Deviation from Flatness to 3.58MHz 1 ns
PD
at 3.58/4.43MHz –54 dB
P-P
(R, G, B,) to 4.43MHz 1 ns
to 10MHz 7 ns
24MHz FILTER: ML6426-3
RMS
f
1dB
f
0.8fc
f
f
–1dB Bandwidth Flatness (R, G, B,) 25ºC 13.6 16 MHz
–3dB Bandwidth Flatness (R, G, B,) 25ºC 21.6 24 26.4 MHz
c
0.8 x fC Attenuation 1.7 dB
StopBand Rejection (All Channels ³ 4 fC)fIN ³ 4 fC, Note 3 –40 dB
SB
NOISE Output Noise (R, G, B,) Fullband 1.0 mV
X
TALK
Crosstalk Input of 0.5V
at 1 MHz –55 dB
P-P
Between any two Channels
X
T
DT
TALK
A/B MUX Crosstalk Input of 0.5V
Group Delay (R, G, B,) 100kHz 22 ns
PD
Group Delay Deviation from Flatness to 3.58MHz 1 ns
PD
at 3.58/4.43MHz -54 dB
P-P
(R, G, B,) to 4.43MHz 1 ns
to 10MHz 2 ns
30MHz FILTER: ML6426-4
f
1dB
f
0.8fc
f
f
–1dB Bandwidth Flatness (R, G, B,) 25ºC 15.3 18 MHz
–3dB Bandwidth Flatness (R, G, B,) 25ºC 27 30 33 MHz
c
0.8 x fC Attenuation 1.7 dB
StopBand Rejection (All Channels ³ 4 fC)fIN ³ 4 fC, Note 3 –40 dB
SB
NOISE Output Noise (R, G, B,) Fullband 1.0 mV
RMS
RMS
4
November, 1999
Page 5
ML6426
ELECTRICAL CHARACTERISTICS (Continued)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
30MHz FILTER: ML6426-4 (Continued)
X
TALK
Crosstalk Input of 0.5V
at 1 MHz –55 dB
P-P
Between any two Channels
X
T
DT
TALK
A/B MUX Crosstalk Input of 0.5V
Group Delay (R, G, B,) 100kHz 18 ns
PD
Group Delay Deviation from Flatness to 10MHz 0.5 ns
PD
at 3.58/4.43MHz -54 dB
P-P
(R, G, B,) to 27MHz 2 n s
36MHz FILTER: ML6426-5
f
1dB
f
f
0.8fc
f
–1dB Bandwidth Flatness (R, G, B,) 25ºC 17 20 MHz
–3dB Bandwidth Flatness (R, G, B,) 25ºC 32.4 36 39.6 MHz
c
0.8 x fC Attenuation 2dB
StopBand Rejection (All Channels ³ 4 fC)fIN ³ 4 fC, Note 3 –40 dB
SB
NOISE Output Noise (R, G, B,) Fullband 1.0 mV
X
TALK
Crosstalk Input of 0.5V
at 1 MHz –55 dB
P-P
Between any two Channels
X
T
DT
TALK
A/B MUX Crosstalk Input of 0.5V
Group Delay (R, G, B,) 100kHz 17 ns
PD
Group Delay Deviation from Flatness to 10MHz 0.5 ns
PD
at 3.58/4.43MHz –54 dB
P-P
(R, G, B,) to 30MHz 4 n s
RMS
48MHz FILTER: ML6426-6
f
1dB
f
0.8fc
f
f
–1dB Bandwidth Flatness (R, G, B,) 25ºC 25.5 30 MHz
–3dB Bandwidth Flatness (R, G, B,) 25ºC 43.2 48 52.8 MHz
c
0.8 x fC Attenuation 1.2 dB
StopBand Rejection (All Channels ³ 4 fC)fIN ³ 4 fC, Note 3 –40 dB
SB
NOISE Output Noise (R, G, B,) Fullband 1.0 mV
X
TALK
Crosstalk Input of 0.5V
at 1 MHz –55 dB
P-P
Between any two Channels
X
T
DT
TALK
A/B MUX Crosstalk Input of 0.5V
Group Delay (R, G, B,) 100kHz 16 ns
PD
Group Delay Deviation from Flatness to 10MHz 0.5 ns
PD
at 3.58/4.43MHz –54 dB
P-P
(R, G, B,) to 40MHz 2 n s
Note 1. Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions.
Note 2. Sustained short circuit protection limited to 10 seconds.
Note 3. 38dB is based on tester noise limits.
RMS
November, 1999
5
Page 6
ML6426
FUNCTIONAL DESCRIPTION
The ML6426 is a triple monolithic continuous time video
filter designed for reconstructing video signals from an
YUV/RGB video D/A source. The ML6426 is intended for
use in AC coupled input and output applications.
The filters approximate a 4th-order Butterworth
characteristic with an optimization toward low overshoot
and flat group delay. All outputs are capable of driving
2V
into AC coupled 150W video loads, with up to 35pF
P-P
of load capacitance. All outputs are capable of driving a
75W load at 1V
P-P
.
All channels are clamped during sync to establish the
appropriate output voltage swing range (DC restore). Thus
the input coupling capacitors do not behave according to
the conventional RC time constant. In most applications,
the ML6426's input coupling capacitors are only 0.1µF.
RINA/YINA
2
0.1µF
0.1µF
0.1µF
RINB/YINB
5
GINA/UINA
6
GINB/UINB
7
BINA/VINA
8
BINB/VINB
9
A/B MUX
1
R
IN
G
IN
B
IN
MUX
TRANSCONDUCTANCE
ERROR AMP
MUX
TRANSCONDUCTANCE
ERROR AMP
MUX
TRANSCONDUCTANCE
ERROR AMP
An external CMOS compatible H
pulse is required
SYNC
which is Active High on the SYNC IN Pin. See Figure 2.
During sync, the feedback clamp sources/sinks current to
restore the DC level. The net result is that the average
input current is zero. Any change in the input coupling
capacitors' value will linearly affect the clamp response
times.
Each channel is essentially tilt-free. Each input is
clamped by a feedback amp which responds to the output
during sync.
The ML6426 is robust and stable under all stated load and
input conditions. Bypassing both V
pins directly to
CC
ground ensures this performance.
5V 5V
+
–
+
–
+
–
V
12
CCO
0.5V
0.5V
0.5V
4
V
CC
4th-ORDER
4th-ORDER
4th-ORDER
FILTER A
FILTER B
FILTER C
×2
×2
×2
R
OUT/YOUT
G
OUT/UOUT
B
OUT/VOUT
220µF
13
220µF
11
220µF
10
75Ω
75Ω
75Ω
R
G
B
SYNC IN
6
16
SYNCIN
ACTIVE HIGH
DISABLE
15
Figure 1. Typical Application Schematic
V
= 2.5V
PW
MIN
IH
VIL = 1.0V
= 2µS
50% x V
Figure 2. SYNC IN Pulse Width
November, 1999
GNDO
14
GND
3
SYNC IN
Page 7
TYPICAL APPLICATIONS
ML6426
RECONSTRUCTION FILTER SELECTION FOR HDTV AND
VGA SIGNAL FILTERING
The filtering requirements for HDTV and VGA standards
vary depending on the resolution of the image to be
displayed, and its refresh rate. The actual refresh rate of
the display is not necessarily the same as the transmission
rate of the frames of images. Some formats use a frame
rate of 30Hz, but the display of those formats cannot be
scanned onto the CRT at 30Hz. Excessive large area
PIXELS VERTICAL LINES ASPECT RATIO PICTURE TRANSMISSION RATE
1920 1080 16:9 60I, 30P, 24P
1280 720 16:9 60P, 30P, 24P
704 480 16:9 and 4:3 60P, 60I, 30P,24P
640 480 4:3 60P, 60I, 30P,24P
P=progressive scan, I=interlaced scan
Table 1: HDTV / Advanced TV Applications: (From Table 10.3 from ATSC document A54)
flicker would result. Such kinds of flicker can be seen on
a PAL display with its brightness set high. To avoid this,
the video will need to be stored in a frame buffer. This
buffer already exists in the MPEG decoder of HDTV
systems, so there is no cost penalty. The buffer is read out
at twice the rate as the frame rate for 30Hz systems, thus
getting us a refresh rate of 60Hz. Similar things are done
for the 24Hz frame rate formats to boost them to a 60Hz
refresh rate.
STANDARD
PIXELS
VERTICAL
LINES
PICTURE
TRANSMISSION
RATE (Note 2)
DISPLAY
REFRESH
RATE (Note 2)
APPROXIMATE
HORIZONTAL
RATE
APPROXIMATE
SAMPLE
CLOCK
APPROXIMATE
RECONSTRUCTION
FILTER CUTOFF
SMPTE 1920 1080 60I 60Hz 35.3KHz 81MHz 40.5MHz ML6426-6
274M
1920 1080 30P, 24P 60Hz 70.6KHz 162MHz 81MHz N/A
SMPTE 1280 720 60P, 30P, 60Hz 47.1KHz 60MHz 30MHz ML6426-5
24P ML6426-4
704 480 (Note 1) 60I 60Hz 15.7KHz 13.5MHz 6.75MHz ML6426-1
704 480 60P, 30P, 60Hz 31KHz 27MHz 13.5MHz ML6426-2
24P ML6426-4
640 480 (Note 1) 60I 60Hz 15.7KHz 24.5MHz 12MHz ML6426-2
640 480 60P, 30P, 60Hz 31KHz 12.27MHz 6MHz ML6426-1
24P
P=progressive scan, I=interlaced scan, na = not available
Note 1: NTSC display rates, can be fed directly into NTSC encoder (set top box)
Note 2: 60 Hz also includes 59.94Hz
Note 3: custom frequencies ranging ± 3 to 6MHz can be special cut to order
Table 2: Choosing the Correct Reconstruction Filter and Video Amplifier for TV Applications, ML6426 options
MICRO LINEAR
FILTER TO USE
(Note 3)
November, 1999
7
Page 8
ML6426
TYPICAL APPLICATIONS (Continued)
Pixel clock rates for the output D/A converters can be
roughly determined from the Table 1. Don’t forget that the
deflection system of a CRT display needs retrace time for
the vertical and horizontal.
This retrace time can vary from one design of an HDTV
set to another, as it only involves tradeoffs between the
frame buffer in the MPEG decoder and the CRT deflection
system. Allowing for 10% retrace time for the vertical and
20% for the horizontal, the appropriate Reconstruction
Filter is summarized in Table 2.
For VGA or RGB monitors, the following resolutions can
use the corresponding Reconstruction Filter and Video
Amplifier as shown in Table 3.
Figures 4, 5, and 6 show system diagrams when the
ML6426 provides a good solution. Figure 7 provides a
more detailed description for advanced TV applications
using various resolutions for legacy video, SDTV, and
HDTV.
USING THE ML6426 IN MULTIPLE RESOLUTIONS
Several ML6426 devices can be used in parallel to
construct a selectable filter selection block ranging from
frequencies between 6.7 MHz to 50MHz. Each ML6426
can be individually controlled via the disable pin. In a
parallel configuration, as shown in Figure 3 and 7, several
ML6426 devices can be used and selected via general
purpose I/O or other logic to perform the proper
reconstruction filtering for the resolution of choice. This
configuration allows for a minimum of bill of materials
and reduces cost. Micro Linears ML6426 EVAL Kit
demonstrates multi-resolution designs. Furthermore, since
the ML6426 pin-out is identical for all the options, the
filters can be interchanged. This allows for ease of product
migration to integrate newer resolutions to filter and drive
various DAC outputs at different sampling frequencies.
PIXELS
VERTICAL LINES
NAME
REFRESH RATE
(prog except noted)
HORIZONTAL RATE
SAMPLE CLOCK
RECONSTRUCTION
FILTER CUTOFF
640 480 VGA 60Hz 31.5kHz 25.175MHz 12.5MHz ML6426-2
VGA 72Hz 37.9kHz 31.5MHz 15.5MHz ML6426-3
VGA 75Hz 37.5kHz 31.5MHz 15.5MHz ML6426-3
800 600 SVGA 56Hz 35.1kHz 36MHz 18MHz ML6426-3
SVGA 60Hz 37.9kHz 40MHz 20MHz ML6426-3
SVGA 72Hz 48.1kHz 50MHz 25MHz ML6426-3
SVGA 75Hz 46.9kHz 49.5MHz 25MHz ML6426-3
1024 768 XGA 43Hz 35.5kHz 44.9MHz 23MHz ML6426-3
Interlaced
XGA 60Hz 37.9kHz 65MHz 33MHz ML6426-5
XGA 70Hz 56.5kHz 75MHz 37.5MHz ML6426-5
XGA 75Hz 60kHz 78.75MHz 39.4MHz ML6426-6
1280 1024 SXGA 75Hz 80kHz 135MHz 68MHz na
SXGA 60Hz 113MHz 57MHz na
1600 1200 UXGA 60Hz 166MHz 83MHz na
N/A = not available
Table 3: Choosing the Correct Reconstruction Filter and Video Amplifier for TV Applications, ML6426 options
8
November, 1999
MICRO LINEAR
FILTER TO USE
Page 9
ML6426
GENERAL
PURPOSE I/O
5V
YIN/R
IN
UIN/G
IN
VIN/B
IN
SYNC IN
0.1µF
0.1µF
0.1µF
SELECT
LOGIC
DISABLE/ENABLE LINES
12 4
15
2
5
6
ML6426-1
7
6.7MHz
8
9
16
1
14 3
12 4
15
2
5
6
ML6426-2
7
12MHz
8
9
16
1
220µF
220µF
220µF
75Ω
75Ω
75Ω
R/Y
G/U
B/V
13
11
10
13
11
10
14 3
12 4
15
2
5
6
7
8
9
16
1
ML6426-5
36MHz
14 3
13
11
10
Figure 3. ATSC Digital Television Application
November, 1999
9
Page 10
ML6426
GRAPHIC
PROCESSOR
FROM SAT
OR CABLE
FROM
CAMERA
VCR
MPEG2
TRANSPORT
AND DECODER
Figure 4. Digital TV Receiver or HDTV Decoder Box
CV
S-VIDEO
ANALOG
HDTV
DECODER
AND DISPLAY
PROCESSOR
VIDEO
DECODER
AND DISPLAY
PROCESSOR
D/A
VIDEO
ENCODER
D/A
RGB
ML6426
ML6426
Y
U
V
Y
U
V
DIGITAL TV
RGB
MONITOR
YCrCb
DIGITAL
FROM
DVD-ROM
OR MEMORY
Figure 5. PC Graphics/Frame Grabber Editing Card
MRI, XRAY,
ULTRASOUND, CT SCAN
DSP
DIGITAL YUV
D/A
ANALOG
Y
ML6426
U
V
MEDICAL
IMAGING
10
Figure 6. PC MRI, XRAY, Ultrasound, CT Scan
November, 1999
Page 11
ML6426
5V
GND
RINA/YINA
RINB/YINB
GINA/UINA
GINB/UINB
BINA/VINA
BINB/VINB
HYSYNC IN
SW2
R5
75Ω
R6
75Ω
R7
75Ω
R8
75Ω
R9
75Ω
R10
75Ω
GND
C 17
C 18
C 19
C 20
C 21
C 22
C 23
C 24
C 25
C 26
C 27
C 28
C 29
C 30
C 31
C 32
C 33
C 34
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
2
5
6
7
8
9
1
16
0.1µF
2
5
6
7
8
9
1
16
0.1µF
2
5
6
7
8
9
1
16
C10
RINA
RINB
GINA
GINB
BINA
BINB
A/B
MUX
SYNC IN
C12
RINA
RINB
GNA
GNB
BINA
BINB
A/B MUX
SYNC IN
C14
RINA
RINB
GNA
GNB
BINA
BINB
A/B MUX
SYNC IN
C2
1µF
C4
1µF
C6
1µF
FB1
12
4
CCO
V
4TH ORDER
FILTER
4TH ORDER
FILTER
4TH ORDER
FILTER
12
4
CCO
V
ML6426-3
12
4
CCO
V
ML6426-4
FB2
C1
1µF
CC
V
DISABLE
15
C3
1µF
CC
V
U2
15
C5
1µF
CC
V
U3
15
GNDO
14
R1 47kΩ
DISABLE
DISABLE
C9
0.1µF
ML6426-1
GND
3
C11
0.1µF
GNDO
14
R2 47kΩ
C13
0.1µF
GNDO
14
R3 47kΩ
3
3
U1
GND
GND
R
OUT
13
G
OUT
11
B
OUT
10
13
R
OUT
11
G
OUT
10
B
OUT
13
R
OUT
11
G
OUT
10
B
OUT
C 41 220µF
C 42 220µF
C 43 220µF
R11
75Ω
R12
75Ω
R13
75Ω
2
2
4
6
8
3
1
R
G
B
JP1
1
3
5
7
4
SWI
0
OUT/YOUT
OUT/UOUT
OUT/VOUT
C8
C 35
C 36
C 37
C 38
C 39
C 40
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
2
5
6
7
8
9
1
16
C16
RINA
RINB
GNA
GNB
BINA
BINB
A/B MUX
SYNC IN
1µF
12
4
CCO
V
ML6426-X
V
UX
C7
1µF
CC
DISABLE
15
C15
0.1µF
GNDO
14
R4 47kΩ
3
GND
R
OUT
G
OUT
B
OUT
Figure 7. Typical Applications Schematic
November, 1999
13
11
10
11
Page 12
ML6426
PERFORMANCE DATA
10
0
–10
–20
–30
–40
AMPLITUDE (dB)
–50
–60
–70
0.01 1 100
0.1 10
FREQUENCY (MHz)
Figure 8. Passband Flatness all Outputs
(Normalized) 6.7 MHz, ML6426CS-1
10
0
–10
–20
10
0
–10
–20
–30
–40
AMPLITUDE (dB)
–50
–60
–70
100k 1M 10M 100M
FREQUENCY (MHz)
Figure 9. Passband Flatness all Outputs
(Normalized) 12MHz, ML6426CS-2
10
0
–10
–20
–30
–40
AMPLITUDE (dB)
–50
–60
–70
1M 10M 100M
FREQUENCY (MHz)
Figure 10. Passband Flatness all Outputs
(Normalized) 24 MHz, ML6426CS-3
10
0
–10
–20
–30
–40
AMPLITUDE (dB)
–50
–60
–30
–40
AMPLITUDE (dB)
–50
–60
–70
1M 10M 100M
FREQUENCY (MHz)
Figure 11. Passband Flatness all Outputs
(Normalized) 30 MHz, ML6426CS-4
10
0
–10
–20
–30
–40
AMPLITUDE (dB)
–50
–60
12
–70
100k 1M 10M 100M 1G
FREQUENCY (Hz)
Figure 12. Passband Flatness all Outputs
(Normalized) 36MHz, ML6426CS-5
November, 1999
–70
10k 100k 1M 10M 100M 1G
FREQUENCY (Hz)
Figure 13. Passband Flatness all Outputs
(Normalized) 48MHz, ML6426CS-6
Page 13
PERFORMANCE DATA (Continuied)
ML6426
0
–10
–20
–30
–40
–50
–60
AMPLITUDE (dB)
–70
–80
–90
–100
10 50
04080
20 60
30 70 90
FREQUENCY (MHz)
100
Figure 14. Frequency Response All Outputs
ML6426-CS-1
12
10
8
6
4
2
0
–2
–4
GROUP DELAY DEVIATION (ns)
–6
–8
0.7 3.5
1.4 4.2
0 2.8 5.6
2.1 4.9 6.3
FREQUENCY (MHz)
7.0
0
–10
–20
–30
–40
–50
–60
AMPLITUDE (dB)
–70
–80
–90
–100
10 50
04080
20 60
30 70 90
FREQUENCY (MHz)
100
Figure 17. Frequency Response All Outputs
ML6426CS-2
10
8
6
4
2
0
–2
–4
–6
GROUP DELAY DEVIATION (ns)
–8
–10
15
26
048
379
FREQUENCY (MHz)
10
Figure 15. Group Delay Deviation of Passband,
All Outputs ML6426CS-1
14
12
10
8
6
4
2
0
–2
GROUP DELAY DEVIATION (ns)
–4
–6
10 50
20 60
04080
30 70 90
FREQUENCY (MHz)
100
Figure 16. Group Delay Deviation All band,
All Outputs ML6426CS-1
November, 1999
Figure 18. Group Delay Deviation of Passband,
All Outputs ML6426CS-2
12
10
8
6
4
2
0
–2
–4
GROUP DELAY DEVIATION (ns)
–6
–8
10 50
20 60
04080
30 70 90
FREQUENCY (MHz)
100
Figure 19. Group Delay Deviation All Band,
All Outputs ML6426CS-2
13
Page 14
ML6426
PERFORMANCE DATA (Continuied)
0
–10
–20
–30
–40
–50
–60
AMPLITUDE (dB)
–70
–80
–90
–100
10 50
20 60
04080
30 70 90
FREQUENCY (MHz)
100
Figure 20. Frequency Response All Outputs
ML6426CS-3
10
8
6
4
2
0
–2
–4
–6
GROUP DELAY DEVIATION (ns)
–8
–10
2.5 12.5
515
01020
7.5 17.5 22.5
FREQUENCY (MHz)
25
Figure 21. Group Delay Deviation of Passband,
All Outputs ML6426CS-3
0
–10
–20
–30
–40
–50
–60
AMPLITUDE (dB)
–70
–80
–90
–100
10 50
20 60
04080
30 70 90
FREQUENCY (MHz)
100
Figure 23. Frequency Response All Outputs
ML6426CS-4
10
8
6
4
2
0
–2
–4
–6
GROUP DELAY DEVIATION (ns)
–8
–10
420
824
01632
12 28 36
FREQUENCY (MHz)
40
Figure 24. Group Delay Deviation of Passband,
All Outputs ML6426CS-4
14
12
10
8
6
4
2
0
–2
–4
GROUP DELAY DEVIATION (ns)
–6
–8
10 50
20 60
04080
30 70 90
FREQUENCY (MHz)
100
Figure 22. Group Delay Dviation All Band,
All Outputs ML6426CS-3
November, 1999
6
4
2
0
–2
–4
–6
–8
–10
GROUP DELAY DEVIATION (ns)
–12
–14
10 50
20 60
04080
30 70 90
FREQUENCY (MHz)
100
Figure 25. Group Delay Deviation All Band,
All Outputs ML6426CS-4
Page 15
PERFORMANCE DATA (Continuied)
ML6426
0
–10
–20
–30
–40
–50
–60
AMPLITUDE (dB)
–70
–80
–90
–100
10 50
20 60
04080
30 70 90
FREQUENCY (MHz)
100
Figure 26. Frequency Response All Outputs
ML6426-CS-5
12
10
8
6
4
2
0
–2
–4
GROUP DELAY DEVIATION (ns)
–6
–8
525
10 30
02040
15 35 45
FREQUENCY (MHz)
50
Figure 27. Group Delay Deviation of Passand,
All Outputs ML6426CS-5
0
–10
–20
–30
–40
–50
–60
AMPLITUDE (dB)
–70
–80
–90
–100
12 60
24 72
04896
36 84 108
FREQUENCY (MHz)
120
Figure 29. Frequency Response All Outputs
ML6426CS-6
10
8
6
4
2
0
–2
–4
–6
GROUP DELAY DEVIATION (ns)
–8
–10
525
10 30
02040
15 35 45
FREQUENCY (MHz)
50
Figure 30. Group Delay Deviation of Passand,
All Outputs ML6426CS-6
12
10
8
6
4
2
0
–2
–4
GROUP DELAY DEVIATION (ns)
–6
–8
10 50
04080
20 60
30 70 90
FREQUENCY (MHz)
100
Figure 28. Group Delay Deviation All band,
All Outputs ML6426CS-5
November, 1999
10
8
6
4
2
0
–2
–4
–6
GROUP DELAY DEVIATION (ns)
–8
–10
10 50
04080
20 60
30 70 90
FREQUENCY (MHz)
100
Figure 31. Group Delay Deviation All Band,
All Outputs ML6426CS-6
15
Page 16
ML6426
PHYSICAL DIMENSIONS
16
Package: S16N
16-Pin Narrow SOIC
0.386 - 0.396
(9.80 - 10.06)
0.017 - 0.027
(0.43 - 0.69)
(4 PLACES)
0.055 - 0.061
(1.40 - 1.55)
1
PIN 1 ID
0.050 BSC
(1.27 BSC)
0.012 - 0.020
(0.30 - 0.51)
0.148 - 0.158
(3.76 - 4.01)
0.059 - 0.069
(1.49 - 1.75)
SEATING PLANE
0.228 - 0.244
(5.79 - 6.20)
0.004 - 0.010
(0.10 - 0.26)
0º - 8º
0.015 - 0.035
(0.38 - 0.89)
0.006 - 0.010
(0.15 - 0.26)
16
November, 1999
Page 17
ORDERING INFORMATION
PART NUMBER CUT-OFF FREQUENCY TEMPERATURE RANGE PACKAGE
ML6426CS-1 6.7MHz 0°C to 70°C 16-Pin Narrow SOIC (S16N)
ML6426CS-2 12MHz 0°C to 70°C 16-Pin Narrow SOIC (S16N)
ML6426CS-3 24MHz 0°C to 70°C 16-Pin Narrow SOIC (S16N)
ML6426CS-4 30MHz 0°C to 70°C 16-Pin Narrow SOIC (S16N)
ML6426CS-5 36MHz 0°C to 70°C 16-Pin Narrow SOIC (S16N)
ML6426CS-6 48MHz 0°C to 70°C 16-Pin Narrow SOIC (S16N)
ML6426CS-15 15MHz 0°C to 70°C 16-Pin Narrow SOIC (S16N)
ML6426
Micro Linear Corporation
2092 Concourse Drive
San Jose, CA 95131
Tel: (408) 433-5200
Fax: (408) 432-0295
www.microlinear.com
© Micro Linear 2000. is a registered trademark of Micro Linear Corporation. All other trademarks are the property of their
respective owners.
Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116;
5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; 5,559,470; 5,565,761; 5,592,128; 5,594,376;
5,652,479; 5,661,427; 5,663,874; 5,672,959; 5,689,167; 5,714,897; 5,717,798; 5,742,151; 5,747,977; 5,754,012; 5,757,174;
5,767,653; 5,777,514; 5,793,168; 5,798,635; 5,804,950; 5,808,455; 5,811,999; 5,818,207; 5,818,669; 5,825,165; 5,825,223;
5,838,723; 5.844,378; 5,844,941. Japan: 2,598,946; 2,619,299; 2,704,176; 2,821,714. Other patents are pending.
Micro Linear makes no representations or warranties with respect to the accuracy, utility, or completeness of the contents
of this publication and reserves the right to make changes to specifications and product descriptions at any time without
notice. No license, express or implied, by estoppel or otherwise, to any patents or other intellectual property rights is granted
by this document. The circuits contained in this document are offered as possible applications only. Particular uses or
applications may invalidate some of the specifications and/or product descriptions contained herein. The customer is urged
to perform its own engineering review before deciding on a particular application. Micro Linear assumes no liability
whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Micro Linear products including
liability or warranties relating to merchantability, fitness for a particular purpose, or infringement of any intellectual property
right. Micro Linear products are not designed for use in medical, life saving, or life sustaining applications.
November, 1999
DS6426-01
17
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