MAX2440EAI Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2440EAI Datasheet PDF : 12 Pages
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900MHz Image-Reject Receivers
Pin Description (continued)
PIN
NAME
FUNCTION
26
GND
Ground Connection for VCO and Phase Shifters
27
GND
Ground (substrate)
28
GND
Ground Connection for Master Bias Cell
0.1µF
0.1µF
RECEIVE
RF INPUT 8.2nH
12nH
0.01µF
LNAGAIN
VCC
47pF
47pF
47pF
47pF
VCC
47pF
47pF
1
VCC
28
GND
2 CAP1
5
RXIN
MAX2440
MAX2441
MAX2442
9 GND
6 VCC
7
GND
11
VCC
8 GND
13
GND
14
GND
4
GND
10 LNAGAIN
VCC
PREGND
VCC
GND
GND
RXOUT
GND
TANK
TANK
PREOUT
MOD
DIV1
VCOON
RXON
GND
VCC
22
47pF
20
VCC
23
47pF
26
27
0.01µF
VCO TANK COMPONENTS FOR
915MHz TYPICAL RF
L3
PART (nH)
MAX2440 6.8
MAX2441 3.3
MAX2442 3.3
C26 C2, C3 R6, R7
(pF) (pF) (Ω)
1.8 3.3 10
3.6 4.0 15
3.0 4.0 15
SEE APPLICATIONS INFORMATION SECTION
L3: COILCRAFT 0805HS-060TMBC
3
RECEIVE IF OUTPUT (330Ω)
0.01µF
12
VARACTOR:
ALPHA SMV1299-004
OR EQUIVALENT
25
R7
L3
24 R6
VCC
100nH
C2
C26
1kΩ
47kΩ
VCO
ADJUST
47pF
1000pF
21
19
18
17
16
15
C3
1kΩ
TO PLL
MOD
DIV1
VCOON
RXON
Figure 1. Typical Operating Circuit
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