MICRO-LINEAR ML6426CS-4

September 1999
PRELIMINARY
ML6426
High Bandwidth Triple Video Filters with Buffered
Outputs for RGB or YUV
GENERAL DESCRIPTION
FEATURES
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.
■
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
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.
■
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
All outputs must be AC coupled into their loads. Each
output can drive 2VP-P into a 150W load. All channels
have a gain of 2 (6dB) at 1VP-P input levels.
■
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
2
5
6
7
8
9
12
4
VCCO
VCC
RINA/YINA
RINB/YINB
MUX
TRANSCONDUCTANCE
ERROR AMP
GINA/UINA
GIN/UINB
–
TRANSCONDUCTANCE
ERROR AMP
+
–
A/B MUX
+
–
4th-ORDER
FILTER B
×2
4th-ORDER
FILTER C
×2
ROUT/YOUT
GOUT/UOUT
13
11
0.5V
MUX
TRANSCONDUCTANCE
ERROR AMP
×2
0.5V
MUX
BINA/VINA
BINB/VINB
+
4th-ORDER
FILTER A
BOUT/VOUT
10
0.5V
1
SYNCIN
16
Filter A
Filter B
Filter C
ML6426-1
6.7MHz
6.7MHz
6.7MHz
DISABLE
GNDO
GND
15
14
3
ML6426-2
12MHz
12MHz
12MHz
ML6426-3
24MHz
24MHz
24MHz
ML6426-4
30MHz
30MHz
30MHz
ML6426-5
36MHz
36MHz
36MHz
ML6426-6
48MHz
48MHz
48MHz
1
ML6426
PIN CONFIGURATION
ML6426
16-Pin Narrow SOIC (S16N)
A/B MUX
1
16
SYNC IN
RINA/YINA
2
15
DISABLE
GND
3
14
GNDO
VCC
4
13
ROUT/YOUT
RINB/YINB
5
12
VCCO
GINA/UINA
6
11
GOUT/UOUT
GINB/UINB
7
10
BOUT/VOUT
BINA/VINA
8
9
BINB/VINB
TOP VIEW
PIN DESCRIPTION
PIN
NAME
FUNCTION
1
A/B MUX
Logic input pin to select between
Bank <A> and Bank <B> video inputs.
This pin is internally pulled high.
8
BINA/VINA Unfiltered analog B- or V-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
2
RINA/YINA
Unfiltered analog R- or Y-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
9
BINB/VINB
Unfiltered analog B- or V-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
3
GND
Analog ground
10
BOUT
Analog B or V-channel output
4
VCC
Analog 5V supply
11
GOUT
Analog G or U-channel output
5
RINB/YINB
Unfiltered analog R- or Y-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
12
VCCO
5V power supply for output buffers
13
ROUT
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.
6
7
2
PIN
GINA/UINA Unfiltered analog G- or U-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
GINB/UINB Unfiltered analog G- or U-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
November, 1999
NAME
FUNCTION
ML6426
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional
device operation is not implied.
Storage Temperature Range ..................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ..................... 260°C
Thermal Resistance (qJA) .................................... 100°C/W
VCC ................................................................................ –0.3V to 7V
Junction Temperature .............................................. 150°C
ESD ..................................................................... >2000V
Analog and Digital I/O ........... GND –0.3V to VCC + 0.3V
Temperature Range ....................................... 0°C to 70°C
VCC Range ................................................... 4.5V to 5.5V
OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VCC = 5V±10%, TA = Operating Temperature Range (Note 1)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
52
80
mA
GENERAL
ICC
Supply Current
No Load (VCC=5.5V)
AV
Low Frequency Gain (R, G, B)
VIN= 100mVP-P at 100KHz
5.34
6.0
6.65
dB
Output Level during Sync (R, G, B,)
DURING SYNC
0.7
0.9
1.1
V
Output Capability
RL = 150W, [email protected]
Clamp Response Time
Settled to Within 10mV, CIN = 0.1µF
10
ms
VI
Input Signal Dynamic Range (R, G, B,)
AC Coupled
1.4
VP-P
OS
Peak Overshoot (R, G, B,)
2VP-P Output Pulse
4.3
%
CL
Output Load Capacitance (R, G, B,)
All Outputs
Output Load Drive Capability, per Pin
(YUV or RGB Outputs)
One Load is 150W
2
loads
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
Output Distortion (R, G, B,)
VOUT = 2VP-P at 1 MHz
0.8
%
PSRR
PSRR (R, G, B,)
0.5VP-P (100kHz) at VCC
35
dB
ISC
Output Short Circuit Current (R, G, B,)
Note 2
120
mA
V IH
Input Voltage Logic High
DISABLE, SYNC IN
VIL
Input Voltage Logic Low
DISABLE, SYNC IN
Input Mux
Data Valid
Time
A/B Mux
Pin Valid
High or Low
V OUT
t CLAMP
T MUX
2
VP-P
35
2.5
pF
V
1.0
V
2
µs
MHz
6.7MHz FILTER: ML6426-1
f1dB
–1dB Bandwidth Flatness (R, G, B,)
25ºC
4.0
4.8
fc
–3dB Bandwidth Flatness (R, G, B,)
25ºC
6.0
6.7
f0.8fc
0.8 x fC Attenuation
7.3
MHz
1.5
dB
–42
dB
StopBand Rejection (All Channels ³ 4 fC)
fIN ³ 4 fC, Note 3
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mVRMS
XTALK
Crosstalk
Input of 0.5VP-P at 1 MHz
Between any two Channels
–55
dB
XTALK
A/B MUX Crosstalk
Input of 0.5VP-P at 3.58/4.43MHz
–54
dB
fSB
November, 1999
–38
3
ML6426
ELECTRICAL CHARACTERISTICS
SYMBOL
(Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
6.7MHZ FILTER: ML6426-1 (continued)
T PD
DT PD
Group Delay (R, G, B,)
100kHz
70
ns
Group Delay Deviation from Flatness
to 3.58MHz
4.0
ns
(R, G, B,)
to 4.43MHz
8.0
ns
9
ns
MHz
to 10MHz
2MHz FILTER: ML6426-2
f 1dB
–1dB Bandwidth Flatness (R, G, B,)
25ºC
7.8
9.2
fc
–3dB Bandwidth Flatness (R, G, B,)
25ºC
10.8
12
f0.8fc
0.8 x fC Attenuation
13.2
MHz
1.2
dB
–40
dB
1
mVRMS
StopBand Rejection (All Channels ³ 4 fC)
fIN ³ 4 fC, Note 3
NOISE
Output Noise (R, G, B,)
Fullband
XTALK
Crosstalk
Input of 0.5VP-P at 1 MHz
Between any two Channels
–55
dB
XTALK
A/B MUX Crosstalk
Input of 0.5VP-P at 3.58/4.43MHz
–54
dB
T PD
Group Delay (R, G, B,)
100kHz
40
ns
DT PD
Group Delay Deviation from Flatness
to 3.58MHz
1
ns
(R, G, B,)
to 4.43MHz
1
ns
to 10MHz
7
ns
MHz
fSB
24MHz FILTER: ML6426-3
f 1dB
–1dB Bandwidth Flatness (R, G, B,)
25ºC
13.6
16
fc
–3dB Bandwidth Flatness (R, G, B,)
25ºC
21.6
24
f0.8fc
0.8 x fC Attenuation
26.4
MHz
1.7
dB
StopBand Rejection (All Channels ³ 4 fC)
fIN ³ 4 fC, Note 3
–40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mVRMS
XTALK
Crosstalk
Input of 0.5VP-P at 1 MHz
Between any two Channels
–55
dB
XTALK
A/B MUX Crosstalk
Input of 0.5VP-P at 3.58/4.43MHz
-54
dB
T PD
Group Delay (R, G, B,)
100kHz
22
ns
DT PD
Group Delay Deviation from Flatness
to 3.58MHz
1
ns
(R, G, B,)
to 4.43MHz
1
ns
to 10MHz
2
ns
MHz
fSB
30MHz FILTER: ML6426-4
f 1dB
–1dB Bandwidth Flatness (R, G, B,)
25ºC
15.3
18
fc
–3dB Bandwidth Flatness (R, G, B,)
25ºC
27
30
f0.8fc
fSB
NOISE
4
0.8 x fC Attenuation
33
MHz
1.7
dB
StopBand Rejection (All Channels ³ 4 fC)
fIN ³ 4 fC, Note 3
–40
dB
Output Noise (R, G, B,)
Fullband
1.0
mVRMS
November, 1999
ML6426
ELECTRICAL CHARACTERISTICS
SYMBOL
(Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
30MHz FILTER: ML6426-4 (Continued)
XTALK
Crosstalk
Input of 0.5VP-P at 1 MHz
Between any two Channels
–55
dB
XTALK
A/B MUX Crosstalk
Input of 0.5VP-P at 3.58/4.43MHz
-54
dB
T PD
Group Delay (R, G, B,)
100kHz
18
ns
DT PD
Group Delay Deviation from Flatness
to 10MHz
0.5
ns
(R, G, B,)
to 27MHz
2
ns
MHz
36MHz FILTER: ML6426-5
f1dB
–1dB Bandwidth Flatness (R, G, B,)
25ºC
17
20
fc
–3dB Bandwidth Flatness (R, G, B,)
25ºC
32.4
36
f0.8fc
0.8 x fC Attenuation
39.6
MHz
2
dB
StopBand Rejection (All Channels ³ 4 fC)
fIN ³ 4 fC, Note 3
–40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mVRMS
XTALK
Crosstalk
Input of 0.5VP-P at 1 MHz
Between any two Channels
–55
dB
XTALK
A/B MUX Crosstalk
Input of 0.5VP-P at 3.58/4.43MHz
–54
dB
T PD
Group Delay (R, G, B,)
100kHz
17
ns
DT PD
Group Delay Deviation from Flatness
to 10MHz
0.5
ns
(R, G, B,)
to 30MHz
4
ns
MHz
fSB
48MHz FILTER: ML6426-6
f1dB
–1dB Bandwidth Flatness (R, G, B,)
25ºC
25.5
30
fc
–3dB Bandwidth Flatness (R, G, B,)
25ºC
43.2
48
f0.8fc
0.8 x fC Attenuation
52.8
MHz
1.2
dB
StopBand Rejection (All Channels ³ 4 fC)
fIN ³ 4 fC, Note 3
–40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mVRMS
XTALK
Crosstalk
Input of 0.5VP-P at 1 MHz
Between any two Channels
–55
dB
XTALK
A/B MUX Crosstalk
Input of 0.5VP-P at 3.58/4.43MHz
–54
dB
T PD
Group Delay (R, G, B,)
100kHz
16
ns
DT PD
Group Delay Deviation from Flatness
to 10MHz
0.5
ns
(R, G, B,)
to 40MHz
2
ns
fSB
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.
November, 1999
5
ML6426
FUNCTIONAL DESCRIPTION
An external CMOS compatible HSYNC pulse is required
which is Active High on the SYNC IN Pin. See Figure 2.
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.
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.
The filters approximate a 4th-order Butterworth
characteristic with an optimization toward low overshoot
and flat group delay. All outputs are capable of driving
2VP-P into AC coupled 150W video loads, with up to 35pF
of load capacitance. All outputs are capable of driving a
75W load at 1VP-P.
Each channel is essentially tilt-free. Each input is
clamped by a feedback amp which responds to the output
during sync.
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.
The ML6426 is robust and stable under all stated load and
input conditions. Bypassing both VCC pins directly to
ground ensures this performance.
5V
0.1µF
RIN
2
5
0.1µF
GIN
6
7
0.1µF
BIN
8
9
5V
12
4
VCCO
VCC
RINA/YINA
RINB/YINB
MUX
TRANSCONDUCTANCE
ERROR AMP
GINA/UINA
GINB/UINB
–
TRANSCONDUCTANCE
ERROR AMP
+
–
A/B MUX
+
–
4th-ORDER
FILTER B
×2
4th-ORDER
FILTER C
×2
ROUT/YOUT
GOUT/UOUT
BOUT/VOUT
0.5V
1
SYNCIN
SYNC IN
16
ACTIVE HIGH
DISABLE
GNDO
GND
15
14
3
Figure 1. Typical Application Schematic
VIH = 2.5V
VIL = 1.0V
50% x VSYNC IN
PWMIN = 2µS
Figure 2. SYNC IN Pulse Width
6
November, 1999
220µF 75Ω
R
220µF 75Ω
G
220µF 75Ω
B
13
11
0.5V
MUX
TRANSCONDUCTANCE
ERROR AMP
×2
0.5V
MUX
BINA/VINA
BINB/VINB
+
4th-ORDER
FILTER A
10
ML6426
TYPICAL APPLICATIONS
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
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.
PIXELS
VERTICAL LINES
ASPECT RATIO
1920
1280
704
640
1080
720
480
480
16:9
16:9
16:9 and 4:3
4:3
PICTURE TRANSMISSION RATE
60I, 30P, 24P
60P, 30P, 24P
60P, 60I, 30P,24P
60P, 60I, 30P,24P
P=progressive scan, I=interlaced scan
APPROXIMATE
HORIZONTAL
RATE
APPROXIMATE
SAMPLE
CLOCK
APPROXIMATE
RECONSTRUCTION
FILTER CUTOFF
MICRO LINEAR
FILTER TO USE
(Note 3)
1920
1080
60I
60Hz
35.3KHz
81MHz
40.5MHz
ML6426-6
1920
1080
30P, 24P
60Hz
70.6KHz
162MHz
81MHz
N/A
1280
720
60Hz
47.1KHz
60MHz
30MHz
704
704
480 (Note 1)
480
60Hz
60Hz
15.7KHz
31KHz
13.5MHz
27MHz
6.75MHz
13.5MHz
640
640
480 (Note 1)
480
60P, 30P,
24P
60I
60P, 30P,
24P
60I
60P, 30P,
24P
60Hz
60Hz
15.7KHz
31KHz
24.5MHz
12.27MHz
12MHz
6MHz
ML6426-5
ML6426-4
ML6426-1
ML6426-2
ML6426-4
ML6426-2
ML6426-1
DISPLAY
REFRESH
RATE (Note 2)
PICTURE
TRANSMISSION
RATE (Note 2)
SMPTE
VERTICAL
LINES
SMPTE
274M
PIXELS
STANDARD
Table 1: HDTV / Advanced TV Applications: (From Table 10.3 from ATSC document A54)
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
November, 1999
7
ML6426
(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.
1024
768
1280
1024
1600
1200
XGA
XGA
XGA
SXGA
SXGA
UXGA
RECONSTRUCTION
FILTER CUTOFF
600
SAMPLE CLOCK
800
VGA
VGA
VGA
SVGA
SVGA
SVGA
SVGA
XGA
HORIZONTAL RATE
480
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.
REFRESH RATE
(prog except noted)
VERTICAL LINES
640
NAME
PIXELS
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
60Hz
72Hz
75Hz
56Hz
60Hz
72Hz
75Hz
43Hz
Interlaced
60Hz
70Hz
75Hz
75Hz
60Hz
60Hz
31.5kHz
37.9kHz
37.5kHz
35.1kHz
37.9kHz
48.1kHz
46.9kHz
35.5kHz
25.175MHz
31.5MHz
31.5MHz
36MHz
40MHz
50MHz
49.5MHz
44.9MHz
12.5MHz
15.5MHz
15.5MHz
18MHz
20MHz
25MHz
25MHz
23MHz
ML6426-2
ML6426-3
ML6426-3
ML6426-3
ML6426-3
ML6426-3
ML6426-3
ML6426-3
37.9kHz
56.5kHz
60kHz
80kHz
65MHz
75MHz
78.75MHz
135MHz
113MHz
166MHz
33MHz
37.5MHz
39.4MHz
68MHz
57MHz
83MHz
ML6426-5
ML6426-5
ML6426-6
na
na
na
MICRO LINEAR
FILTER TO USE
TYPICAL APPLICATIONS
N/A = not available
Table 3: Choosing the Correct Reconstruction Filter and Video Amplifier for TV Applications, ML6426 options
8
November, 1999
ML6426
GENERAL
PURPOSE I/O
SELECT
LOGIC
DISABLE/ENABLE LINES
5V
12
0.1µF
YIN/RIN
0.1µF
UIN/GIN
15
2
5
6
7
8
9
16
1
4
220µF
13
ML6426-1
6.7MHz
220µF
220µF
3
12
4
R/Y
11
10
14
75Ω
75Ω
75Ω
G/U
B/V
0.1µF
VIN/BIN
SYNC IN
15
2
5
6
7
8
9
16
1
15
2
5
6
7
8
9
16
1
13
ML6426-2
12MHz
11
10
14
3
12
4
13
ML6426-5
36MHz
11
10
14
3
Figure 3. ATSC Digital Television Application
November, 1999
9
ML6426
GRAPHIC
PROCESSOR
FROM SAT
OR CABLE
MPEG2
TRANSPORT
AND DECODER
Y
HDTV
DECODER
AND DISPLAY
PROCESSOR
D/A
U
ML6426
DIGITAL TV
V
Figure 4. Digital TV Receiver or HDTV Decoder Box
FROM
CAMERA
VCR
CV
S-VIDEO
ANALOG
Y
VIDEO
DECODER
AND DISPLAY
PROCESSOR
RGB
D/A
ML6426
U
V
VIDEO
ENCODER
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
Figure 6. PC MRI, XRAY, Ultrasound, CT Scan
10
November, 1999
RGB
MONITOR
ML6426
5V
FB1
FB2
GND
0.1µF
C2
C1
1µF
1µF
C 18
0.1µF 2 RINA
0.1µF 5 RINB
C 19
0.1µF 6 GINA
C 20
0.1µF 7 GINB
C 21
0.1µF 8 BINA
C 22
0.1µF 9 BINB
C 17
RINB/YINB
VCCO
12
R5
75Ω
C9
0.1µF
4
C10
RINA/YINA
U1
ML6426-1
VCC
GND
ROUT 13
4TH ORDER
FILTER
C 41
220µF
R11
75Ω
ROUT/YOUT
C 42
220µF
R12
75Ω
GOUT/UOUT
C 43
220µF
R13
75Ω
BOUT/VOUT
R6
75Ω
15 DISABLE
16 SYNC IN
3 GND
A/B
1 MUX
R7
75Ω
BOUT 10
4TH ORDER
FILTER
14 GNDO
GINA/UINA
GOUT 11
4TH ORDER
FILTER
R1 47kΩ
GINB/UINB
R8
75Ω
C3
1µF
1µF
C 26
C 27
C 28
BINB/VINB
R10
75Ω
ROUT
U2
ML6426-3
GOUT
3 GND
C 25
0.1µF 2
RINA
0.1µF 5
RINB
0.1µF 6
GNA
0.1µF 7
GNB
0.1µF 8
BINA
0.1µF 9
BINB
1
A/B MUX
16
SYNC IN
0.1µF
14 GNDO
C 24
15 DISABLE
C 23
VCCO
R9
75Ω
12
BINA/VINA
C11
4
C4
VCC
C12
0.1µF
BOUT
13
JP1
11
10
2
1
4
3
6
5
8
7
4
R2 47kΩ
3
2
SWI
1
1µF
1µF
12
SW2
C 32
C 33
C 34
0.1µF
ROUT
U3
ML6426-4
GOUT
3 GND
C 31
0.1µF 2
RINA
0.1µF 5
RINB
0.1µF 6
GNA
0.1µF 7
GNB
0.1µF 8
BINA
0.1µF 9
BINB
1
A/B MUX
16
SYNC IN
15 DISABLE
C 30
VCCO
C 29
0
C13
14 GNDO
0.1µF
C5
4
HYSYNC IN
C6
VCC
C14
BOUT
13
11
10
R3 47kΩ
1µF
C 39
C 40
ROUT
UX
ML6426-X
GOUT
3 GND
C 38
14 GNDO
C 37
0.1µF 2
RINA
0.1µF 5
RINB
0.1µF 6
GNA
0.1µF 7
GNB
0.1µF 8
BINA
0.1µF 9
BINB
1
A/B MUX
16
SYNC IN
0.1µF
VCC
C 36
VCCO
C 35
C15
4
C7
1µF
12
C8
15 DISABLE
C16
0.1µF
BOUT
13
11
10
R4 47kΩ
Figure 7. Typical Applications Schematic
November, 1999
11
ML6426
10
10
0
0
–10
–10
AMPLITUDE (dB)
AMPLITUDE (dB)
PERFORMANCE DATA
–20
–30
–40
–20
–30
–40
–50
–50
–60
–60
–70
0.01
0.1
10
1
–70
100k
100
1M
10
0
0
–10
–10
AMPLITUDE (dB)
AMPLITUDE (dB)
Figure 9. Passband Flatness all Outputs
(Normalized) 12MHz, ML6426CS-2
10
–20
–30
–40
–20
–30
–40
–50
–50
–60
–60
10M
–70
1M
100M
10M
FREQUENCY (MHz)
0
0
–10
–10
AMPLITUDE (dB)
AMPLITUDE (dB)
10
–20
–30
–40
–20
–30
–40
–50
–50
–60
–60
10M
100M
1G
–70
10k
100k
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 12. Passband Flatness all Outputs
(Normalized) 36MHz, ML6426CS-5
12
Figure 11. Passband Flatness all Outputs
(Normalized) 30 MHz, ML6426CS-4
10
1M
100M
FREQUENCY (MHz)
Figure 10. Passband Flatness all Outputs
(Normalized) 24 MHz, ML6426CS-3
–70
100k
100M
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 8. Passband Flatness all Outputs
(Normalized) 6.7 MHz, ML6426CS-1
–70
1M
10M
November, 1999
Figure 13. Passband Flatness all Outputs
(Normalized) 48MHz, ML6426CS-6
ML6426
(Continuied)
0
0
–10
–10
–20
–20
–30
–30
AMPLITUDE (dB)
AMPLITUDE (dB)
PERFORMANCE DATA
–40
–50
–60
–40
–50
–60
–70
–70
–80
–80
–90
–90
–100
0
10
20
30
40
50
60
70
80
–100
90 100
0
10
20
FREQUENCY (MHz)
10
8
8
6
GROUP DELAY DEVIATION (ns)
GROUP DELAY DEVIATION (ns)
10
6
4
2
0
–2
–4
–6
60
70
80
90 100
4
2
0
–2
–4
–6
–8
0
–10
0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0
0
1
2
FREQUENCY (MHz)
3
4
5
6
7
8
9
10
FREQUENCY (MHz)
Figure 15. Group Delay Deviation of Passband,
All Outputs ML6426CS-1
Figure 18. Group Delay Deviation of Passband,
All Outputs ML6426CS-2
12
14
10
GROUP DELAY DEVIATION (ns)
12
GROUP DELAY DEVIATION (ns)
50
Figure 17. Frequency Response All Outputs
ML6426CS-2
12
10
8
6
4
2
0
–2
8
6
4
2
0
–2
–4
–6
–4
–6
40
FREQUENCY (MHz)
Figure 14. Frequency Response All Outputs
ML6426-CS-1
–8
30
–8
0
10
20
30
40
50
60
70
80
90 100
0
10
20
30
40
50
60
70
80
90 100
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 16. Group Delay Deviation All band,
All Outputs ML6426CS-1
November, 1999
Figure 19. Group Delay Deviation All Band,
All Outputs ML6426CS-2
13
ML6426
(Continuied)
0
0
–10
–10
–20
–20
–30
–30
AMPLITUDE (dB)
AMPLITUDE (dB)
PERFORMANCE DATA
–40
–50
–60
–40
–50
–60
–70
–70
–80
–80
–90
–90
–100
0
10
20
30
40
50
60
70
80
–100
90 100
0
10
20
FREQUENCY (MHz)
8
8
6
6
GROUP DELAY DEVIATION (ns)
GROUP DELAY DEVIATION (ns)
10
4
2
0
–2
–4
–6
–8
0
2.5
5
7.5
70
80
90 100
4
2
0
–2
–4
–6
–10
10 12.5 15 17.5 20 22.5 25
Figure 21. Group Delay Deviation of Passband,
All Outputs ML6426CS-3
6
10
4
8
2
4
2
0
–2
–4
–6
4
8
12
16
20
24
28
32
36
40
Figure 24. Group Delay Deviation of Passband,
All Outputs ML6426CS-4
12
6
0
FREQUENCY (MHz)
GROUP DELAY DEVIATION (ns)
GROUP DELAY DEVIATION (ns)
60
–8
FREQUENCY (MHz)
0
–2
–4
–6
–8
–10
–12
0
10
20
30
40
50
60
70
80
90 100
FREQUENCY (MHz)
–14
0
10
20
30
40
50
60
70
80
90 100
FREQUENCY (MHz)
Figure 22. Group Delay Dviation All Band,
All Outputs ML6426CS-3
14
50
Figure 23. Frequency Response All Outputs
ML6426CS-4
10
–8
40
FREQUENCY (MHz)
Figure 20. Frequency Response All Outputs
ML6426CS-3
–10
30
November, 1999
Figure 25. Group Delay Deviation All Band,
All Outputs ML6426CS-4
ML6426
(Continuied)
0
0
–10
–10
–20
–20
–30
–30
AMPLITUDE (dB)
AMPLITUDE (dB)
PERFORMANCE DATA
–40
–50
–60
–40
–50
–60
–70
–70
–80
–80
–90
–90
–100
0
10
20
30
40
50
60
70
80
–100
90 100
0
12
24
FREQUENCY (MHz)
10
8
8
6
GROUP DELAY DEVIATION (ns)
GROUP DELAY DEVIATION (ns)
10
6
4
2
0
–2
–4
–6
72
84
96 108 120
4
2
0
–2
–4
–6
–8
0
5
10
15
20
25
30
35
40
45
–10
50
FREQUENCY (MHz)
Figure 27. Group Delay Deviation of Passand,
All Outputs ML6426CS-5
10
10
8
8
6
4
2
0
–2
–4
–6
5
10
15
20
25
30
35
40
45
50
Figure 30. Group Delay Deviation of Passand,
All Outputs ML6426CS-6
12
6
0
FREQUENCY (MHz)
GROUP DELAY DEVIATION (ns)
GROUP DELAY DEVIATION (ns)
60
Figure 29. Frequency Response All Outputs
ML6426CS-6
12
–8
48
FREQUENCY (MHz)
Figure 26. Frequency Response All Outputs
ML6426-CS-5
–8
36
4
2
0
–2
–4
–6
–8
0
10
20
30
40
50
60
70
80
90 100
FREQUENCY (MHz)
–10
0
10
20
30
40
50
60
70
80
90 100
FREQUENCY (MHz)
Figure 28. Group Delay Deviation All band,
All Outputs ML6426CS-5
November, 1999
Figure 31. Group Delay Deviation All Band,
All Outputs ML6426CS-6
15
ML6426
PHYSICAL DIMENSIONS
Package: S16N
16-Pin Narrow SOIC
0.386 - 0.396
(9.80 - 10.06)
16
0.148 - 0.158 0.228 - 0.244
(3.76 - 4.01) (5.79 - 6.20)
PIN 1 ID
1
0.017 - 0.027
(0.43 - 0.69)
(4 PLACES)
0.050 BSC
(1.27 BSC)
0.059 - 0.069
(1.49 - 1.75)
0º - 8º
0.055 - 0.061
(1.40 - 1.55)
16
0.012 - 0.020
(0.30 - 0.51)
SEATING PLANE
November, 1999
0.004 - 0.010
(0.10 - 0.26)
0.015 - 0.035
(0.38 - 0.89)
0.006 - 0.010
(0.15 - 0.26)
ML6426
ORDERING INFORMATION
PART NUMBER
CUT-OFF FREQUENCY
TEMPERATURE RANGE
PACKAGE
ML6426CS-1
ML6426CS-2
ML6426CS-3
ML6426CS-4
ML6426CS-5
ML6426CS-6
ML6426CS-15
6.7MHz
12MHz
24MHz
30MHz
36MHz
48MHz
15MHz
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
16-Pin Narrow SOIC (S16N)
16-Pin Narrow SOIC (S16N)
16-Pin Narrow SOIC (S16N)
16-Pin Narrow SOIC (S16N)
16-Pin Narrow SOIC (S16N)
16-Pin Narrow SOIC (S16N)
16-Pin Narrow SOIC (S16N)
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.
DS6426-01
November, 1999
17