LTC5541 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC5541' PDF : 16 Pages View PDF
BLOCK DIAGRAM
20 19 18 16
21
IFBIAS IF+
IF– IFGND EXPOSED
PAD
IF
AMP
RF
2
LO
AMP
LO2
15
VCC3
14
CT
3
SHDN
5
PASSIVE
MIXER
BIAS
LOSEL
9
LO1
11
VCC2 6
VCC1 8
LOBIAS
7
GND PINS ARE
NOT SHOWN
5541 BD
LTC5541
TEST CIRCUIT
VCCIF
3.1V TO 5.3V
100mA
4:1
T1
C10
L1
L2
C9
C8
IFOUT
190MHz
50Ω
20 19
IFBIAS IF+
1 NC
C1
RFIN
50Ω
2 RF
18 17
IF– GND
16
IFGND
C4
LO2 15
LO2IN
50Ω
VCC3 14
C7
3 CT
LTC5541
GND 13
4 GND
GND 12
C3
SHDN
(0V/3.3V)
5 SHDN
VCC2 LOBIAS VCC1
LOSEL
LO1 11
GND
6
7
8
9
10
VCC
3.1V TO 3.5V
92mA
C5
0.015”
0.062”
0.015”
C6
LOSEL
(0V/3.3V)
5541 TC
RF
GND DC1431A
BOARD
BIAS STACK-UP
GND (NELCO N4000-13)
LO1IN
50Ω
L1, L2 vs IF
Frequencies
IF (MHz)
L1, L2 (nH)
140
270
190
150
240
100
300
56
380
33
REF DES
C1
C3, C4, C6,
C7, C8
C5, C9
C10
L1, L2
T1
(Alternate)
VALUE
2.2pF
22pF
1μF
1000pF
150nH
TC4-1W-7ALN+
(WBC4-6TLB)
SIZE COMMENTS
0402
AVX
0402
AVX
0603
AVX
0402
AVX
0603 Coilcraft 0603CS
Mini-Circuits
(Coilcraft)
Figure 1. Standard Downmixer Test Circuit Schematic (190MHz IF)
5541f
9
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