T0781 Datasheet, PDF (13/18 Pages) ATMEL Corporation – 1700 - 2300 MHz High Linearity SiGe Active Receiver Mixer

T0781
Bill of Materials (for 1700 MHz to 2000 MHz Evaluation Board)
Component
Designator
Value
Vendor
Part Number Description
IC1
Atmel
T0781
SiGe receiver mixer
J3, J4, J5
Johnson
Components
142-0701-851 SMA connector, end launch with tab, for 0.062 inch
board
T9, T11
1:1
Panansonic
EHF-FD1619 RF transformer
T2
1:1
Mini-Circuits
TC1-1
IF transformer
Lfil
1 µH
Würth Elektronik
74476401 Inductor, 1210 footprint, minimum 200 mA rating
L1, L2
see Table 1
TOKO
LL1608-FSR10J Inductor, 0603 footprint, high Q series
L3
nc
L4
nc
C1, C3, C20, C21
6.8 pF
Capacitor, 0603 footprint
C6, C10
100 pF
Capacitor, 0603 footprint
C7, C9
120 pF
Capacitor, 0603 footprint
C4, C5
2.2 pF
Capacitor, 0603 footprint
C11, C12
3.3 pF
Capacitor, 0603 footprint
The T0781 utilizes an IF tank circuit to maximize performance across the entire IF band-
width. the off-chip inductors L1 and L2 resonate with an on-chip capacitor (4 pF) to pro-
vide IF tunability. therefore, L1 and L2 must be selected such that the resonance occurs
at the desired IF.
The following table provides the inductor values required on the evaluation board for
some common intermediate frequencies. By default, all evaluation board are shipped
with L1 = L2 = 100 nH, resulting in a 200 MHz resonant IF.
Table 1. IF Tank Circuit
IF (MHz) Typical
70
150
200
300
L1, L2 (nH)
680
150
100
39
TOKO Part Number
LL2012-FHR68J
LL1608-FSR15J
LL1608-FSR10J
LL1608-FS39NJ
13
4534B–SIGE–01/03