LTC5542 查看數據表（PDF） - Linear Technology
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LTC5542 Datasheet PDF : 16 Pages
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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
5542 BD
LTC5542
TEST CIRCUIT
VCCIF
3.1V TO 5.3V
100mA
4:1
T1
C10
L1
L2
C9
C8
IFOUT
190MHz
50Ω
C1
RFIN
50Ω
20 19
IFBIAS IF+
1 NC
2 RF
C11
3 CT
18 17
IF– GND
16
IFGND
C4
LO2 15
LO2IN
50Ω
LTC5542
VCC3 14
C7
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
99mA
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
VALUE
SIZE COMMENTS
C1, C6, C7, C8
22pF
0402
AVX
C3, C4
4.7pF
0402
AVX
C5, C9
1μF
0603
AVX
C10
1000pF 0402
AVX
C11
0.7pF
0402
AVX
L1, L2
150nH 0603 Coilcraft 0603CS
T1
TC4-1W-7ALN+
(Alternate) (WBC4-6TLB)
Mini-Circuits
(Coilcraft)
Figure 1. Standard Downmixer Test Circuit Schematic (190MHz IF)
5542f
9
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