MIC1700
Micrel
MIC1700
HDTV/SDTV 6
th
Order Video Filter for Component
Video plus Composite Video
General Description
The MIC1700 is a complete reconstruction filter solution for
high definition set-top boxes.
The device has two independent component inputs (YP
R
P
B
or RGB) selectable via a 2-to-1 multiplexer, and a separate S-
video input (Y/C). Component channel filters have a select-
able cutoff frequency (8MHz or 36MHz) to support both
standard (SD) and high definition (HD) applications. S-video
filters have fixed cutoff (8MHz) to support legacy composite
applications. In addition, S-video channels are summed to
provide a filtered CV output for an RF modulator or VCR. All
inputs are DC-coupled with a 0V to 1V peak-to-peak range.
All outputs are designed to drive 2V peak-to-peak into
AC-coupled 150Ω loads. This supports 1V peak-to-peak into
a 75Ω load with a 75Ω series source terminator.
Filters have 6
th
order near Butterworth characteristics with
cutoffs of 8MHz (SD and CV) and 36MHz (HD). These
characteristics are chosen to provide good passband flat-
ness with sufficient stop band attenuation and minimal group
delay distortion.
The device operates from a 5VDC supply.
Data sheets and support documentation are available at
Micrel’s web site, www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
S-video (Y/C) input, S-video and summed (CV) output
2 YP
R
P
B
or RGB inputs, YP
R
P
B
or RGB output
YP
R
P
B
/RGB 2-1 input multiplexer
DC coupled inputs – AC-coupled output drive
6db output gain for 75Ω source termination
Component filters selectable for SD or HD cutoffs
6
th
order Butterworth characteristic
Flat passband (HD 0.5dB @ 30MHz typ)
Low group delay distortion (HD: 12ns @ 30MHz typ)
Single 5V supply
28-pin wide body SOIC package (with exposed pad for
improved thermal performance)
HDTV
HDTV set-top boxes
Video games
HDTV systems
DVD players
Digital satellite set-top boxes
HDTV monitors
Applications
•
•
•
•
•
•
•
Ordering Information
Part Number
MIC1700BWME
Junction Temp. Range
0°C to +70°C
Package
SOIC-28
Typical Application
MIC1700x-x
HSEL
Y1A
Y1B
PR1
PR2
1
2
3
4
5
6
HSEL
Y1A
Y1B
PR1
VCC
VCC
Y1OUT
PROUT
28
27
26
V
CC
4.7µF
220µF
220µF
220µF
0.1µF
75Ω
75Ω
75Ω
75Ω
75Ω
75Ω
220µF
220µF
220µF
75Ω
YOUT
75Ω
75Ω
COUT
75Ω
75Ω
75Ω
V
CC
CVOUT
Y1OUT
PROUT
PBOUT
25
PR2
GND
PB1
PB2
YIN
CIN
GND
MUX
CVOUT
GND
VCC
GND
20
19
18
17
PBOUT
GND
YOUT
COUT
24
23
22
PB1
PB2
Composite
Inputs
YIN
CIN
7
8
9
10
11
21
MUX
12
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
October 2003
1
MIC1700
MIC1700
Micrel
Pin Configuration
HSEL
1
Y1A
2
Y1B
3
PR1
4
PR2
5
GND
6
PB1
7
PB2
8
YIN
9
CIN
10
GND
11
MUX
12
NC
13
NC
14
28
VCC
27
VCC
26
Y1OUT
25
PROUT
24
PBOUT
23
GND
22
YOUT
21
COUT
20
CVOUT
19
GND
18
VCC
17
GND
16
NC
15
NC
28-Pin Wide Body SOIC (WM)
Pin Description
Pin Number
1
2
3
4
5
6, 11, 17, 19, 23
7
8
9
10
12
13, 14, 15, 16
18, 27, 28
20
21
22
24
25
26
Pin Name
HSEL
Y1A
Y1B
PR1
PR2
GND
PB1
PB2
YIN
CIN
MUX
NC
VCC
CVOUT
COUT
YOUT
PBOUT
PROUT
Y1OUT
Pin Function
Digital (Input): selects for the HD or SD filtering. A high selects HD filters.
Y (Input): component channel 1, selected when the MUX is high. 0V to 1V
range.
Y (Input): component channel 2, selected when the MUX is low. 0V to 1V
range.
P
R
(Input): component channel 1, selected when the MUX is high. 0V to 1V
range.
P
R
(Input): component channel 2, selected when the MUX is low. 0V to 1V
range.
Ground.
P
B
(Input): component channel 1, selected when the MUX is high. 0V to 1V
range.
P
B
(Input): component channel 2, selected when the MUX is low. 0V to 1V
range.
Legacy (S-video): luminance input, 0V to 1V.
Legacy (S-video): chroma input, 0V to 1V.
Digital MUX control to select input 1 or 2 of the component channel. A high
selects input 1.
No connect.
Do not
connect these pins.
Positive side of the 5V power supply.
Legacy composite video output, typically 1V to 3V.
Legacy chroma output, typically 1V to 3V.
Legacy luminance video output, typically 1V to 3V.
PB color component output, either SD or HD, typically 1V to 3V.
PR color component output, either SD or HD, typically 1V to 3V.
Luminance component output, either SD or HD, typically 1V to 3V.
MIC1700
2
October 2003
MIC1700
Micrel
Truth Table
MUX Select Pin
H
H
HSEL
L
HDTV Mode
Y1A, PB1, PR1 Inputs
SD Mode
Y1A, PB1, PR1 Inputs
L
HDTV Mode
Y1B, PB2, PR2 Inputs
SD Mode
Y1B, PB2, PR2 Inputs
October 2003
3
MIC1700
MIC1700
Micrel
Absolute Maximum Ratings
(Note 1)
Maximum Input Voltage ................................................ V
CC
Supply Voltage ................................................................ 6V
Lead Temperature (soldering, 5 sec) ........................ 260°C
ESD Rating, .............................................................
Note 3
Operating Ratings
(Note 2)
Analog Input Voltage Range .............................. 0V to 1.1V
Digital Input Voltage Range ................................... 0 to V
CC
Supply Voltage (V
CC
) ...............................................5V±5%
Ambient Temperature Range ....................... –0°C to +70°C
Package Thermal Resistance
SOIC
(θ
JA
),
Note 4, 6 ..........................................
35°C/W
Electrical Characteristics
(Note 5)
V
CC
= 4.75V to 5.25V, T
A
= 25°C. Values in
bold
apply over entire operating temperature range. T
A
from 0°C to +70°C. Values apply to all channels unless noted.
Symbol
P
D
V
O
Z
IN
I
IN
Parameter
Power Dissipation
Linear Output Range
Input Impedance,
Note 7
Input Bias Current,
Note 7
Crosstalk,
Note 7
Crosstalk,
Note 7
Crosstalk,
Note 7
PSSR
Power Supply Rejection Ratio
Conditions
No load
R
L
= 150Ω, AC-Coupled
V
IN
= 0V to 1V
V
IN
= 0V to 1V
channel-to-channel, f = 3MHz, NTSC Mode
channel-to-channel, f = 20MHz, HDTV Mode
between MUX inputs, f = 3MHz
at 400kHz
Min
Typ
725
2.0
1
40
–70
–64
–60
40
Max
900
2.2
Units
mW
V
MΩ
µA
dB
dB
dB
dB
Filter Specifications, HD Operating Mode
f
–3dB
f
–1dB
A
74MHz
Av
Av
P
K
T
D
T
GD
SNR
DG
DP
–3dB Bandwidth
–1dB Bandwidth
74MHz Attenuation
Low Frequency Gain
Gain Matching
Peaking,
Note 7
Baseband Delay
Group Delay distortion
Signal to Noise,
Note 7
Differential Gain,
Note 7
Differential Phase,
Note 7
f = 100kHz
f = 3.6MHz
f = 6.0MHz
Note 2
40IRE modulated ramp
@ both 3.58MHz and 4.43MHz
V
AC
= 0.5V
p-p
, V
DC
= 0.5V
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V at 400kHz
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V
channel-to-channel
25
5.5
33
30
36
30
30
6
1
1
65
5
20
77
2
2
6.3
MHz
MHz
dB
dB
%
dB
ns
ns
ns
dB
%
°
Filter Specifications, NTSC/PAL Operating Mode
f
–1dB
f
–3dB
A
27MHz
Av
Av
G
D
SNR
Digital I/O
V
IH
V
IL
Input High
Input Low
HSTL and MUX pin
HSTL and MUX pin
2.0
0.5
V
V
–1dB Bandwidth
–3dB Bandwidth
27MHz Attenuation
Low Frequency Gain
Gain Matching
Group Delay,
Note 7
Signal to Noise,
Note 7
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V
V
AC
= 0.5V
pk-pk
, V
DC
= 0.5V at 400kHz
channel-to-channel
f = 3.6MHz
Note 8
7.6
36
5.5
7.9
8.7
44
6
1
70
68
6.3
MHz
MHz
dB
dB
%
ns
dB
MIC1700
4
October 2003
MIC1700
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Note 8.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
With SOIC attached by leads only.
Specification for packaged product only.
When thermally enhanced SOIC heatsink pad is soldered to a copper pad on a single layer PCB.
Guaranteed by design and characterization.
Low pass filter enabled. V
IN
= 1V
pk-pk
. Wideband noise floor over 20MHz.
Micrel
October 2003
5
MIC1700
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
