19-0548; Rev 1; 4/07
KIT
ATION
EVALU
E
BL
AVAILA
HDTV Continuously Variable
Anti-Aliasing Filters
General Description
Features
♦
Continuously Variable Anti-Aliasing Filter
5MHz to 34MHz in 256 Steps
♦
Supports All Standard Video and Computer Input
Formats
480i, 480p, 720p, 1080i
QVGA, VGA, SVGA, XGA, SXGA, UXGA
Y P
b
P
r
, G
s
BR, RGBHV, Y/C, CVBS
♦
Accepts Any Input Sync Format
Sync on Y, Sync on G, External Sync (Positive
or Negative)
Sync on All Channels
♦
Buffered Outputs Drive Standard 150Ω Video
Load
0dB (MAX7469)
+6dB (MAX7470)
♦
DC- or AC-Coupled Outputs
♦
Single +5V Analog and +3.3V Digital Supplies
♦
5mW Power-Down Mode
♦
20-Pin TQFN Lead-Free Package
MAX7469/MAX7470
The MAX7469/MAX7470 triple-channel, anti-aliasing fil-
ters and buffers are ideal for high-definition (HD) and
standard-definition (SD) television (TV) applications.
Compatible with 1080i, 720p, 480p, and 480i scanning
system standards and computer format signals, the
MAX7469/MAX7470 support component video (Y P
b
P
r
,
G
s
BR, and RGBHV), as well as composite (CVBS) and
S-video (Y/C).
The MAX7469/MAX7470 limit the input bandwidth for
anti-aliasing and out-of-band noise reduction prior to
digital conversion by an ADC or video decoder. The
MAX7469/MAX7470 frequency response can be contin-
uously varied in 256 linear steps through an I
2
C inter-
face from below SD resolution to beyond HD resolution.
The output buffers of the MAX7469/MAX7470 drive a
2V
P-P
video signal into a standard 150Ω load. The inputs
are AC-coupled, and the outputs can be either DC- or
AC-coupled. The MAX7469 has a gain of 0dB, and the
MAX7470 has a gain of +6dB. Both devices are available
in a 20-pin TQFN package and are fully specified over
the 0°C to +85°C upper-commercial temperature range.
Applications
HDTV (LCD, PDP, DLP, CRT)
Set-Top Boxes
Personal Video Recorders
Home Theaters
Pin Configuration
AV
DD
GND
GND
Ordering Information
PART
MAX7469
UTP+
MAX7470
UTP+**
PIN-PACKAGE
20 TQFN-EP*
20 TQFN-EP*
BUFFER
GAIN (dB)
0
+6
PKG
CODE
T2055-4
T2055-4
TOP VIEW
15
14
13
A1
12
A0
11
IN1 16
GND 17
IN2 18
GND 19
IN3 20
10
9
OUT1
AV
DD
OUT2
AV
DD
OUT3
MAX7469
MAX7470
+
1
DGND
2
EXTSYNC
3
SCL
4
SDA
*EP
8
7
6
Note:
All devices are specified over the 0°C to +85°C operating
temperature range.
+
Indicates lead-free packaging.
*EP
= Exposed pad.
**Future
product—contact factory for availability.
5
DV
DD
TQFN (5mm x 5mm)
*EXPOSED PAD.
SEE PIN DESCRIPTION FOR CONNECTION.
Typical Operating Circuit appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
HDTV Continuously Variable
Anti-Aliasing Filters
MAX7469/MAX7470
ABSOLUTE MAXIMUM RATINGS
AV
DD
to GND............................................................-0.3V to +6V
DV
DD
to DGND.........................................................-0.3V to +4V
IN_, EXTSYNC to GND .................................................................
..................................-0.3V to the lower of (AV
DD
+ 3V) and +6V
OUT_ to GND ...............................................................................
..................................-0.3V to the lower of (AV
DD
+ 3V) and +6V
A_ to GND ....................................................................................
..................................-0.3V to the lower of (AV
DD
+ 3V) and +6V
SCL, SDA to DGND ..................................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
20-Pin TQFN (derate 33.3mW/°C above +70°C) ...2666.7mW
Maximum Current into IN_, A_, GND,
SCL, SDA, and EXTSYNC............................................±50mA
Operating Temperature Range...............................0°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(AV
DD
= +5V ±5%, DV
DD
= 2.7V to 3.6V, R
LOAD
= 150Ω to GND, C
IN
= 0.1µF, T
A
= 0°C to +85°C, unless otherwise noted. Typical
values are at AV
DD
= 5V, DV
DD
= 3.3V, T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
HD: f = 100kHz to 30MHz, relative to
100kHz (Note 1)
Filter Passband Response
A
PB
SD: f = 100kHz to 5.75MHz, relative to
100kHz (Note 2)
HD: f = 74MHz (Note 1)
SD: f = 27MHz (Note 2)
HD: 100kHz to 30MHz, relative to 100kHz
(Note 1)
SD: 100kHz to 5.75MHz, relative to 100kHz
(Note 2)
HD: channel to channel, 100kHz to 2MHz,
(Note 1)
Group Delay Matching
t
G(MATCH)
SD: channel to channel, 100kHz to 500kHz,
(Note 2)
-3dB, bypass mode, independent of filter
setting
dG
dφ
SNR
H
DIST
V
DIST
Five-step modulated staircase (Note 2)
Five-step modulated staircase (Note 2)
Output signal (2V
P-P
) to RMS noise (100kHz
to 30MHz), f = 30MHz
Deviations in a line with an 18µs, 100 IRE
bar; 1 line = 63.5µs (Note 2)
Deviations in 130 lines with 18µs, 100 IRE
bars (Note 2)
40
52
MIN
-3
TYP
-0.6
±0.1
57
63
20
ns
15
5
ns
1.5
100
0.25
0.25
69
0.3
0.3
MHz
%
Degrees
dB
%
%
MAX
+1
dB
±1.0
dB
UNITS
Filter Stopband Attenuation
A
SB
Group Delay Deviation
Δt
G
Bypass Frequency Response
SD Differential Gain
SD Differential Phase
Signal-to-Noise Ratio
SD Line-Time Distortion
SD Field-Time Distortion
2
________________________________________________________________________________________
HDTV Continuously Variable
Anti-Aliasing Filters
MAX7469/MAX7470
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= +5V ±5%, DV
DD
= 2.7V to 3.6V, R
LOAD
= 150Ω to GND, C
IN
= 0.1µF, T
A
= 0°C to +85°C, unless otherwise noted. Typical
values are at AV
DD
= 5V, DV
DD
= 3.3V, T
A
= +25°C.)
PARAMETER
Clamp Settling Time
Minimum Functional Input Sync
Amplitude
Low-Frequency Gain (Note 1)
Low-Frequency Gain Matching
Maximum Output Voltage
Amplitude
Maximum Input Voltage
Amplitude
Channel-to-Channel Isolation
Output Clamping Level Variation
Power-Supply Rejection Ratio
DIGITAL INPUTS (EXTSYNC, A1, A0)
Input Logic-High Voltage
Input Logic-Low Voltage
Input Leakage Current
Input Capacitance
DIGITAL INPUTS (SDA, SCL)
Input Logic-High Voltage
Input Logic-Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUT (SDA)
Output Logic-Low Voltage
Tri-State Leakage Current
Tri-State Output Capacitance
POWER REQUIREMENTS
Analog Supply Voltage Range
Digital Supply Voltage Range
Analog Supply Current
Digital Supply Current
AV
DD
DV
DD
I
AVDD
I
DVDD
Normal operation, no load
Power-down mode, no load
f
SCL
= 400kHz
4.75
2.7
5
3.3
180
1
25
5.25
3.6
200
1.5
V
V
mA
µA
V
OL
I
L
C
OUT
I
SINK
= 3mA
V
IN
= 0 to DV
DD
±0.1
6
0.4
±10
V
µA
pF
V
IH
V
IL
V
HYST
I
IN
C
IN
V
IN
= 0 to DV
DD
0.05 x
DV
DD
±0.1
6
±10
0.7 x
DV
DD
0.3 x
DV
DD
V
V
V
µA
pF
V
IH
V
IL
I
IN
C
IN
V
IN
= 0 to DV
DD
±1
6
2.0
0.8
±10
V
V
µA
pF
PSRR
(Notes 1, 4)
DC
50
MAX7469
MAX7470
100kHz
DC to 30MHz
MAX7469
MAX7470
SYMBOL
CONDITIONS
To 1% with 100 IRE step
(Note 4)
Positive
Negative
125
-0.5
5.5
0
6
0.05
2.4
2.4
1.2
62
±100
+0.5
6.5
MIN
TYP
350
650
MAX
UNITS
H
mV
dB
dB
V
P-P
V
P-P
dB
mV
dB
_______________________________________________________________________________________
3
HDTV Continuously Variable
Anti-Aliasing Filters
MAX7469/MAX7470
TIMING CHARACTERISTICS
(AV
DD
= +5V ±5%, DV
DD
= 2.7V to 3.6V, R
LOAD
= 150Ω to GND, C
IN
= 0.1µF, T
A
= 0°C to +85°C, unless otherwise noted. Typical
values are at AV
DD
= 5V, DV
DD
= 3.3V, T
A
= +25°C.)
PARAMETER
Serial-Clock Frequency
Bus Free Time Between STOP (P)
and START (S) Condition
Hold Time (Repeated) START (Sr)
Condition
SCL Pulse-Width Low
SCL Pulse-Width High
Setup Time for a Repeated
START (Sr) Condition
Data Hold Time
Data Setup Time
Rise Time of Both SDA and SCL
Signals, Receiving
Fall Time of Both SDA and SCL
Signals, Receiving
Fall Time of SDA Signal,
Transmitting
Setup Time for STOP (P)
Condition
Capacitive Load for Each Bus
Line
Pulse Width of Spikes that Are
Suppressed by the Input Filter
SYMBOL
f
SCL
t
BUF
t
HD;STA
t
LOW
t
HIGH
t
SU;STA
t
HD;DAT
t
SU;DAT
t
r
t
f
t
f
t
SU;STO
C
b
t
SP
(Note 7)
0
(Note 6)
(Note 5)
After this period, the first clock pulse is
generated
CONDITIONS
MIN
0
1.3
0.6
1.3
0.6
0.6
0.0
100
0
0
20 +
0.1C
b
0.6
400
50
300
300
250
0.9
TYP
MAX
400
UNITS
kHz
µs
µs
µs
µs
µs
µs
ns
ns
ns
ns
µs
pF
ns
Note 1:
The filter passband edge is set to code 255.
Note 2:
The filter passband edge is set to code 40.
Note 3:
1H is the total line period, depending on the video standard. For NTSC, this is 63.5µs; for HDTV, the line period is 29.64µs.
Note 4:
The clamp level is at the sync tip for signals with sync pulses, and at the blanking level otherwise.
Note 5:
A master device must provide a hold time of at least 300ns for the SDA signal (referred to V
IL
of the SCL signal) to bridge
the undefined region of SCL’s falling edge.
Note 6:
C
b
= total capacitance of one bus line in pF. t
R
and t
F
measured between 0.3V
DD
and 0.7V
DD
.
Note 7:
Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.
4
________________________________________________________________________________________
HDTV Continuously Variable
Anti-Aliasing Filters
MAX7469/MAX7470
SDA
t
f
SCL
t
LOW
t
r
t
SU;DAT
t
f
t
HD;STA
t
SP
t
r
t
SP
t
HD;STA
t
HD;DAT
S
t
HIGH
t
SU;STA
S
r
t
SU;STO
P
S
Figure 1. 2-Wire, Serial-Interface Timing Diagram
Typical Operating Characteristics
(AV
DD
= +5V, DV
DD
= 3.3V, R
LOAD
= 150Ω to GND, C
LOAD
= 0 to 20pF to GND, C
IN
= 0.1µF, T
A
= +25°C, unless otherwise noted.)
FREQUENCY RESPONSE (MAX7469)
0
-10
RESPONSE (dB)
-20
-30
-40
-50
-60
-70
-80
0.1
1
10
100
1000
FREQUENCY (MHz)
CODE 90
CODE 255
CODE 40
CODE 220
RESPONSE (dB)
MAX7469 toc01
PASSBAND FLATNESS (MAX7469)
MAX7469 toc02
FREQUENCY RESPONSE (MAX7470)
0
-10
RESPONSE (dB)
CODE 40
-20
-30
-40
-50
-60
-70
0.1
1
10
100
1000
CODE 90
CODE 220
CODE 255
MAX7469 toc03
10
1.0
0.5
0
-0.5
-1.0
CODE 90
-1.5
-2.0
-2.5
-3.0
0.1
1
10
CODE 220
CODE 255
CODE 40
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
PASSBAND FLATNESS (MAX7470)
MAX7469 toc04
GROUP DELAY
80
70
60
DELAY (ns)
50
40
30
HD
SD
MAX7469 toc05
2T RESPONSE (1 IRE = 7.14mV)
MAX7469 toc06
7.0
6.5
6.0
RESPONSE (dB)
5.5
5.0
4.5
4.0
3.5
3.0
0.1
1
10
CODE 220
CODE 255
CODE 40
CODE 90
90
300mV/div
300mV/div
20
10
0
100
0.1
1
10
100
200ns/div
FREQUENCY (MHz)
FREQUENCY (MHz)
_______________________________________________________________________________________
5
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