Tel: +44 1460 256 100
Fax: +44 1460 256 101
www.golledge.com
Golledge Electronics Ltd
Eaglewood Park, Ilminster
Somerset, TA19 9DQ, UK
SAW Filter 70.0MHz Model: TB0185A
Part No: MA07421 REV. NO.: 1
TB0185A v1 1
A. MAXIMUM RATING:
1. Input Power Level: +20 dBm
2. Operating Temperature: 0°C to +70°C
3. Storage Temperature: -40°C to +85°C
B. ELECTRICAL CHARACTERISTICS:
Parameter Unit Min. Typ. Max.
Center frequency, Fc MHz 69.8 70 70.2
Insertion Loss, IL dB -21 23
1 dB Bandwidth MHz 7.0 7.3 -
3 dB Bandwidth MHz 7.3 7.9 -
40 dB Bandwidth MHz -10.2 10.75
Amplitude ripple (within ±2.8MHz) dB -0.8 1
Phase Linearity (within ±2.92MHz) (rms) deg -2.5 6
Group Delay ripple (within ±2.92MHz) nsec -50 100
Absolute Delay µsec -1.02 -
Attenuation (Reference level from 0 dB)
10 ~ 64MHz dB 55 62 -
76~140MHz dB 55 62 -
Substrate Material - - LT-
Temperature Coefficient ppm/ oC- -18 -
Ambient Temperature oC-25 -
Tel: +44 1460 256 100
Fax: +44 1460 256 101
www.golledge.com
Golledge Electronics Ltd
Eaglewood Park, Ilminster
Somerset, TA19 9DQ, UK
SAW Filter 70.0MHz Model: TB0185A
Part No: MA07421 REV. NO.: 1
TB0185A v1 2
C. FREQUENCY CHARACTERISTICS:
(1) S21 Response:
(2) Group Delay and Ripple
Tel: +44 1460 256 100
Fax: +44 1460 256 101
www.golledge.com
Golledge Electronics Ltd
Eaglewood Park, Ilminster
Somerset, TA19 9DQ, UK
SAW Filter 70.0MHz Model: TB0185A
Part No: MA07421 REV. NO.: 1
TB0185A v1 3
D. MEASUREMENT CIRCUIT:
For 50 ohm Unbalanced Input and Output
C1
C2
50Ω
Network analyzer
50Ω
SAW Filter
L1
L2
K
E
A,B,C,D,F,G,H,I,J,L
Input: L1=180 nH, Q>40; C1=47 pF
Output: L2=180 nH, Q>40; C2=27 pF
E. OUTLINE DRAWING:
Pin K: RF Input
Pin E: RF Output
Pin L: Input Ground
Pin F: Output Ground
Pin A, B, C, D, G, H, I, J: To be Ground
1
8
5
