Rainbow Electronics MAX2701 - Manual (Page 20)

MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
20 ______________________________________________________________________________________
V
CC
5.6nH
5pF
DUPLEXER
FROM
TRANSMITTER
BPF
LPF_1
I-CHANNEL
LOAD
Q-CHANNEL
LOAD
LPF_2
LPF_Q2
LPF_Q1
IOUT2 QOUT2
V CC
QIN2+
GND
LNAIN
V CC
V
CC
GND
CEXT-
MIX_I
GAIN_SET
CEXT+
MIX_Q
IIN1+
IOUT1
LO
GND
QIN1+
DCQ1+
QOUT1
IIN2- DCI2- DCQ2+ QIN2-
V
CC
100pF
V
CC
RFIN+
GND
GND
X 2
O/I
O
1 2 3 5 8 6 7 10 9 4 11 12
13
14
16
15
18
19
20
21
22
23
24
25 26 27 28 29 30 31 32 33 34 35 36
48
37
38
39
40
41
42
43
44
45
46
47
I/Q
SHDN
GND AGC
LNAOUT
QIN1-
DCQ1-
DCQ2- RFIN- GND DCI2+
IIN2+
DCI1+
IIN1-
V CC
GND
LO
INPUT
68pF
RX ENABLE
DOUBLER
ENABLE/DISABLE
LNA GAIN
SELECT
AGC
DCI1-
CEXT
RF
INPUT
22pF
1pF
22pF
T-LINE BALUN
50
Ω
4.7nH 4.7nH
50
Ω
Q2
0.1
µ F
0.056
µ F
0.1
µ F
0.1
µ
F
0.056
µ F
0.056
µ
F
0.01
µ
F
100pF
22pF
6pF
68pF
4.7nH
100pF
1000pF
0.01
µ
F
V
CC
1000pF 68pF
TO ALL
V
CC
PINS
0.1
µ
F
68pF
680
Ω
2.2k
1k
1k
0.1
µ F
0.1
µ F
10
µ F
0.56
µ
F
2.2k
680
Ω
0.56
µ F
0.1
µ F
0.056
µ F
1k
0.1
µ F
0.1
µ F
2.2k
680
Ω
0.1
µ F
0.1
µ F
0.1
µ
F
680
Ω
2.2k
1k
X2_EN
68pF
MAX2700
CTRL 1
CTRL 2
DETECT
17
1
1.5nH
68pF
MIXTNK
Figure 1. MAX2700 Typical Operating Circuit (1960MHz)