SAW Components
Description
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SAW Components
Data Sheet B3872
SAW Components Vestigial Sideband Filter Preliminary Data Sheet
B3872 38,90 MHz
Ceramic package DCC18
Standard
q B/G
Features
q Vestigial sideband filter with sound q Constant group delay q Hermetically sealed ceramic package
Terminals
q Gold plated
Dimensions in mm, approx.
weight 0,8 g Pin configuration 1 10 6 5 2, 4, 7, 9 3, 8 Input Input – ground Output Output – ground Case – ground Must be grounded
Type B3872
Ordering code B39390-B3872-U210
Marking and Package according to C61157-A7-A054
Packing according to F61074-V8166-Z000
Electrostatic Sensitive Device (ESD)
Maximum ratings Operable temperature range Storage temperature range DC voltage Source power
T Tstg VDC Ps
– 20/+ 85 – 40/+ 85 0 15
˚C ˚C V dBm
source impedance 50 Ω
2
Nov 12, 2002
SAW Components Vestigial Sideband Filter Preliminary Data Sheet
Characteristics Operating temperature: Terminating source impedance: Terminating load impedance: Group delay aperture
B3872 38,90 MHz
T = ZS = ZL =
25 50 50 80
˚C Ω Ω kHz min.
typ.
38,90 34,5 max.
— 36,4 MHz dB
Nominal frequency Insertion attenuation at fN Relative attenuation (relative to αN) 31,90 33,15 33,40 39,65 40,15 40,40 44,40 25,00 … 31,90 40,40 … 45,00 Reflected wave signal suppression 1,50 µs … 6,00 µs after main pulse 1,60 µs … 1,50 µs before main pulse Group delay at fN
fN
αN αrel MHz MHz MHz MHz MHz MHz MHz MHz MHz
— 33,4
34,0 -0,9 -0,8 2,3 22,0 34,0 38,0 32,0 30,0
48,0 0,1 0,0 3,3 25,0 40,0 55,0 40,0 37,0
— 1,1 1,2 4,3 — — — — —
dB dB dB dB dB dB dB dB dB
37,0 50,0 τN —
45,0 65,0 1,6
— — —
dB dB µs
Group delay ripple (p-p) ∆τ 33,40 … 39,65 MHz Temperature coefficient of frequency
— —
90 – 87
150 —
ns ppm/K
TCf
3
Nov 12, 2002
SAW Components Vestigial Sideband Filter Preliminary Data Sheet
Frequency response
B3872 38,90 MHz
4
Nov 12, 2002
SAW Components Vestigial Sideband Filter Preliminary Data Sheet
B3872 38,90 MHz
Published by EPCOS AG Surface Aco...
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