Specify
Ceramic Filter LTU Series
455kHz or 450kHz
Ceramic Filters
8
7
2 1
8.2
3
2.7
4
To take the best advantage of the safety feature of ceramic filters, connect output to anIF amplifier through a DC cut capacitor.
Avoid directly applying DC to output end of ceramic filters (Between 5 & 2,3,4)
Pin Connections
4.3
1 = Input
2 = Ground
3 = Output
FEATURES
High Selectivity
Low Cost
Wide Range of bandwidths Available
Industry Standard Outline & Pinout
SPECIFICATION
APPLICATIONS
Communications Equipment
Insertion
Pass Band
6 dB
40 dB
Part
Centre
Loss
Ripple
Bandwidth
Bandwidth
Numb er
Freq (M Hz)
(dB Max)
(dB Max)
(kHz Min)
(kHz Min)
LTU455B2
455 +/ -2.0
4
2
+ / - 15 .0
+/ -30.0
LTU455C2
455 +/ -2.0
4
2
+ / - 12 .5
+/ -24.0
LTU455D2
455 +/ -1.5
4
2
+ / - 10 .0
+/ -20.0
LTU455E2
E Q
455 +/ -1.5
Y C H A
6
A C T E R I S T I C
+ / - 7 .5
2
+ / - 15 .0
F R
U E N C
R
S
LTU455F2
455 +/ -1.5
6
2
+ / - 6 .0
+ / - 12 .5
LTU455G2
455 +/ -1.5
6
2
+ / - 4 .5
+ / - 10 .0
LTU455H2
455 +/ -1.0
6
2
+ / - 3 .0
+ / - 9 .0
LTU455I2
455 +/ -1.0
6
2
+ / - 2 .0
+ / - 7 .5
LTU455HT
455 +/ -1.0
6
2
+ / - 3 .0
+ / - 9 .0
Frequency Characteristics
Test Circuit
0
Stopband
Att. + / -100kHz
(dB M in )
27
27
27
27
27
25
25
25
35
Input/Output
Impedence ( )
1500
1500
1500
1500
2000
2000
2000
2000
2000
1
R1
LTU
3
Attenuation (dB)
10
20
LTU 455B2
LTU 455E2
LTU 455H2
2
30
Rg
R2
C
40
RF
V.M
S.S.G
50
60
400
410
420
430
440
450
460
470
480
490
500
Freq (kHz)
Rg+R1+R2=input/Output Impedence
C=10pF (Including strays and input/output
capacitance of RF Voltmeter
www.aelcrystals.co.uk
q u a r t z
b a s e d
f r e q u e n c y
c o n t r o l
c o m p o n e n t s
Order Hotline +44 1293 524245
44
www.aelcrystals.co.uk
sales@aelcrystals.co.uk
Specify
Ceramic Filter LTW33 Series
450 kHz & 455kHz
Ceramic Filters
7
11.3
2.9 2.9 2.6
Pin Connections
4
5
3
2
1
4.3
33-455D
2.0
1 = Input
2 = Ground
3 = Ground
4 = Ground
5 = Output
To take the best advantage of the safety feature of ceramic filters, connect output to anIF amplifier through a DC cut capacitor.
Avoid directly applying DC to output end of ceramic filters (Between 5 & 2,3,4)
FEATURES
High Selectivity
Low Cost
Wide Range of bandwidths Available
Industry Standard Outline
SPECIFICATION
Insertion
Pass Band
Part
Centre
Loss
Ripple
Numb er
Freq (M Hz)
(dB Max)
(dB Max)
LTW33-455B
455 +/ -2.0
4
2
LTW33-455C
455 +/ -2.0
4
2
LTW33-455D
455 +/ -1.5
4
2
LTW33-455E
Q U
455 +/ -1.5
C H A R
6
C T E R I S T I C
2
F R E
E N C Y
A
LTW33-455F
455 +/ -1.5
6
2
LTW33-455G
455 +/ -1.5
6
2
LTW33-455H
455 +/ -1.0
6
2
LTW33-455I
455 +/ -1.0
6
2
LTW33-455HT
455 +/ -1.0
6
2
Frequency Characteristics
6 dB
Bandwidth
(kHz Min)
+/-15.0
+/-12.5
+/-10.0
+/- 7.5
S
+/- 6.0
+/- 4.5
+/- 3.0
+/- 2.0
+/- 3.0
APPLICATIONS
Communications Equipment
40 dB
Bandwidth
(kHz Min)
+/ -30.0
+/ -24.0
+/ -20.0
+/-15.0
+/-12.5
+/-10.0
+/- 9.0
+/- 7.5
+/- 9.0
Stopband
Att. +/ -100kHz
(dB M in )
35
35
35
35
35
35
35
35
60
Input/Output
Impedence ( )
1500
1500
1500
1500
2000
2000
2000
2000
2000
Test Circuit
1
5
R1
0
LTW
2
3
Attenuation (dB)
10
LTW33-455B
LTW33-455D
LTW33-455H
4
20
30
Rg
R2
C
40
50
RF
V.M
S.S.G
60
400
410
420
430
440
450
460
470
480
490
500
Freq (kHz)
Rg+R1+R2=input/Output Impedence
C=10pF (Including strays and input/output
capacitance of RF Voltmeter
www.aelcrystals.co.uk
q u a r t z
b a s e d
f r e q u e n c y
c o n t r o l
c o m p o n e n t s
Order Hotline +44 1293 524245
45
www.aelcrystals.co.uk
sales@aelcrystals.co.uk
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