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
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44
www.aelcrystals.co.uk
sales@aelcrystals.co.uk