Datasheet

1
1
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2
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D D
C C
B B
A A
Title
Number RevisionSize
B
Date: 11/3/2009 Sheet of
File: C:\Projects\..\LMH1981.SchDoc Drawn By:
J1
Ref. In
VCC
HSYNC_B
VSYNC_A
1
1
2
2
3
3
4
4
8
8
7
7
6
6
5
5
J2
EXT HVF IN
GND
HSYNC_A
10.0k 1%
R1
BPOUT
13
Video In
4
VFOUT
9
GND
5
VSOUT
8
CSOUT
12
VCC
11
GND
2
VCC
6
VCC
3
Rext
1
HSOUT
7
GND
10
OEOUT
14
U1
LMH1981MT
TP2
VCC
FSYNC_A
VSYNC_B
FSYNC_B
INIT
1
2
JP1
75R TERM
1
2
JP2
LPF ENAB
TP1
VIDEO IN
VC
1
OUT
4
GND
3
EN
2
VCC
6
X1
ASVV-27.000MHZ-N152-T
TP3
Vtune
R20
5K
1
2
JP5
XO DISAB
HSYNC_A
HSYNC_B
HIN
VIN
VSYNC_A
FIN
FSYNC_A
HSYNC_B
VSYNC_B
FSYNC_B
Layout Note: JP Legend is
"Short = LMH1981"
"Open = 27M/EXT HVF"
Layout Note: Place U4 on
bottom side of PCB, and
do not label IC.
Layout Note:
Pot Legend is
"VCXO TUNE"
Note:
Short = Enable
Open = Hi-Z
1
2
JP3
INPUT SEL
1
2
JP4
MUX ENAB
Layout Note:
XO Legend is
"27 MHz VCXO Source"
Layout Note: IC Legend is
"LMH1981 Sync Separator"
OSCin
3V3
3V3
3V3
OPEN
R18
Analog Input and LMH1981 Sync Separator
External HVF+INIT Input Header
27 MHz Clock Source from VCXO or SMA Input
Quad SPDT Input MUX with Output Hi-Z
Layout Note: Pin Legend is
"EXT INIT" (inline w/ pin 8)
"EXT F " (inline w/ pin 7)
"EXT V" (inline w/ pin 6)
"EXT H" (inline w/ pin 5)
"GND" (inline w/ pins 1-4)
75.0
R4
33
R2
33
R5
33
R6
33
R10
33
R13
OPEN
R15
33
R8
33
R19
OPEN
R21
0.1uF
C2
0.1uF
C8
0.1uF
C3
0.1uF
C14
0.1uF
C10
560pF
C9
C0G/NP0: 0.1uF
C18
10uF
C6
10uF
C13
10uF
C17
10.0k
R7
10.0k
R9
IN
1
NC1
2
NO1
3
COM1
4
NC2
5
NO2
6
COM2
7
GND
8
V+
16
EN
15
NC4
14
NO4
13
COM4
12
NC3
11
NO3
10
COM3
9
U2
TS3A5018PW
250mA
220 ohm
L1
250mA
220 ohm
L2
250mA
220 ohm
L3
FIN
VIN
HIN
OPEN
R23
OPEN
R22
3V3
0.1uF
C19
Note: 27 MHz Clock Source can come from
either the on-board VCXO or the SMA Input.
If the SMA Input is used, the VCXO output
should be disabled. The SMA input signal
can be AC or DC coupled, and terminated
and.or biased as needed using the available
resistor options.
Layout Note: Minimize
stub length of the traces
on 27M net.
OPEN
R12
OPEN
R11
OPEN
R14
Layout Note: Minimize stub
length of HSYNC_B
INIT
27M
OPEN
R16
OPEN
R17
Note: If U4 is not populated,
shorts can be installed to
directly connect the HVF
signals to the LMH1983 inputs.
3V3
50-OHM CONTROLLED IMPEDANCE
1uF
C15
1uF
C16
1uF
C12
1uF
C11
1uF
C4
1uF
C5
0
R3
VCC
VCC
Layout Note: Unless otherwise noted, label all
ICs, Test Points, Jumpers and Headers per the
component comment. For jumpers and headers,
label pins according to the pin legend noted. All
labels should be present on top and bottom silk
screen (except for ICs).
TP4
GND
Layout Note: Distribute GND test
points around the PCB.
TP5
GND
TP6
GND
TP7
GND
TP8
GND
TP9
GND
TP10
GND
TP11
GND
1
2 4
3
SW1
FSM2JSMA
1uF
C1
OPEN
C7
1
2 3 4 5
J3
27MHz SMA In
LMH1983 Eval Board - LMH1981
B
Sauerwald
4 5
PIC101PIC102
COC1
PIC201PIC202
COC2
PIC301
PIC302
COC3
PIC401
PIC402
COC4
PIC501
PIC502
COC5
PIC601
PIC602
COC6
PIC701PIC702
COC7
PIC801PIC802
COC8
PIC901
PIC902
COC9
PIC1001
PIC1002
COC10
PIC1101
PIC1102
COC11
PIC1201
PIC1202
COC12
PIC1301
PIC1302
COC13
PIC1401
PIC1402
COC14
PIC1501
PIC1502
COC15
PIC1601
PIC1602
COC16
PIC1701
PIC1702
COC17
PIC1801
PIC1802
COC18
PIC1901PIC1902
COC19
PIJ101
PIJ102PIJ103
COJ1
PIJ201
PIJ202
PIJ203
PIJ204 PIJ205
PIJ206
PIJ207
PIJ208
COJ2
PIJ301
PIJ302 PIJ303 PIJ304 PIJ305
COJ3
PIJP101
PIJP102
COJP1
PIJP201
PIJP202
COJP2
PIJP301
PIJP302
COJP3
PIJP401
PIJP402
COJP4
PIJP501
PIJP502
COJP5
PIL101PIL102
COL1
PIL201PIL202
COL2
PIL301PIL302
COL3
PIR101PIR102
COR1
PIR201PIR202
COR2
PIR301 PIR302
COR3
PIR401
PIR402
COR4
PIR501PIR502
COR5
PIR601PIR602
COR6
PIR701 PIR702
COR7
PIR801PIR802
COR8
PIR901
PIR902
COR9
PIR1001PIR1002
COR10
PIR1101PIR1102
COR11
PIR1201
PIR1202
COR12
PIR1301PIR1302
COR13
PIR1401PIR1402
COR14
PIR1501PIR1502
COR15
PIR1601
PIR1602
COR16
PIR1701
PIR1702
COR17
PIR1801PIR1802
COR18
PIR1901PIR1902
COR19
PIR2001
PIR2002
PIR2003
COR20
PIR2101PIR2102
COR21
PIR2201
PIR2202
COR22
PIR2301
PIR2302
COR23
PISW101
PISW102
PISW103
PISW104
COSW1
PITP101
COTP1
PITP201
COTP2
PITP301
COTP3
PITP401
COTP4
PITP501
COTP5
PITP601
COTP6
PITP701
COTP7
PITP801
COTP8
PITP901
COTP9
PITP1001
COTP10
PITP1101
COTP11
PIU101
PIU102
PIU103
PIU104
PIU105
PIU106
PIU107 PIU108
PIU109
PIU1010
PIU1011
PIU1012
PIU1013
PIU1014
COU1
PIU201
PIU202
PIU203
PIU204
PIU205
PIU206
PIU207
PIU208 PIU209
PIU2010
PIU2011
PIU2012
PIU2013
PIU2014
PIU2015
PIU2016
COU2
PIX101
PIX102
PIX103
PIX104
PIX106
COX1
PIC501 PIC601
PIC1201 PIC1301
PIC1601 PIC1701
PIL101
PIL201
PIL301
PIR2201
PISW103
PISW104
PIC1901
PIR1902
PIR2102
PIR2202
PIR2301
PIX104
NL27M
PIR1701
PIU209
NLFIN
PIR201
PIR1702
PIU2011
NLFSYNC0A
PIR1001
PIU2010
NLFSYNC0B
PIC202
PIC302 PIC402 PIC502 PIC602
PIC802
PIC902
PIC1002 PIC1102 PIC1202 PIC1302
PIC1402 PIC1502 PIC1602 PIC1702
PIC1801
PIJ102PIJ103
PIJ201
PIJ202
PIJ203
PIJ204
PIJ302 PIJ303 PIJ304 PIJ305
PIJP301
PIJP401
PIJP501
PIR102
PIR402
PIR1101
PIR1401
PIR2003
PIR2302
PITP401 PITP501 PITP601 PITP701 PITP801 PITP901 PITP1001 PITP1101
PIU102
PIU105 PIU1010
PIU208
PIX103
PIR1201
PIU204
NLHIN
PIR601
PIR1202
PIU202
NLHSYNC0A
PIR1501
PIR1901
PIU203
NLHSYNC0B
PIR801
PISW101
PISW102
NLINIT
PIU1013
PIU1012
PIU109
PIR1402 PIU2012
PIR1102
PIU2013
PIU2014
PIR602
PIU107 PIR502 PIU108
PIR202 PIU1014 PIR101 PIU101
PIJP502
PIR1802
PIX102
PIJP402
PIR902
PIU2015
PIJP302 PIR702
PIU201
PIJP101
PIR401
PIJ208 PIR802
PIJ207 PIR1002
PIJ206 PIR1302
PIJ205 PIR1502
PIJ101
PIJP102
PIR302
PIC1902 PIJ301
PIC1802
PIR2002
PITP301
PIX101
PIC1401 PIC1501
PIL302
PIR1801
PIR2001
PIX106
PIC1001 PIC1101
PIL202PIR701
PIR901
PIU2016
PIC901
PIJP201
PIC102
PIC702 PIJP202
PIR301
PITP101
PIC101
PIC701
PIU104
PIR2101
NLOSCin
PIC201
PIC301 PIC401
PIC801
PIL102
PITP201
PIU103
PIU106
PIU1011
PIR1601
PIU207
NLVIN
PIR501
PIR1602
PIU205
NLVSYNC0A
PIR1301
PIU206
NLVSYNC0B