Rainbow Electronics MAX2701 - Manual (Page 21)

MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
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MAX2701
V
CC
MIXTNK
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
V
CC
V
CC
RFIN+
GND
GND
X 2
1 2 3 5 8 6 7 10 9 4 11 12
13
14
16
15
17
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/O
O
I/Q
SHDN
GND AGC
LNAOUT
QIN1-
DCQ1-
DCQ2- RFIN- GND DCI2+
IIN2+
DCI1+
IIN1-
V CC
GND
LO
INPUT
68pF
1000pF
100pF
RX ENABLE
DOUBLER
ENABLE/DISABLE
LNA GAIN
SELECT
AGC
DCI1-
CEXT
RF
INPUT
22pF 22pF
68pF
T-LINE BALUN
50
Ω
I2
50
Ω
2.7nH 2.7nH
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
2.7nH
2pF
1nH
68pF
0.5pF
10pF
V
CC
1000pF 68pF
0.5pF TO ALL
V
CC
PINS
0.1
µ
F
0.01
µ F
68pF
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
CTRL 2
CTRL1
DETECT
1
1000pF
5.6nH
3pF
Figure 2. MAX2701 Typical Operating Circuit (2400MHz)