
2.3GHz to 2.7GHz Wireless
Broadband RF Transceiver
Block Diagram/Typical Operating Circuit
MODE
Rx BASEBAND
CONTROL
Tx INPUTS
HPF CONTROL
Rx I OUTPUTS
48
47
46
45
44
43
42
41
40
39
38
37
V CCRXLNA
GNDRXLNA
1
2
+
MAX2837
TO
IMUX
36
35
RXBBQ+
RXBBQ-
Rx Q
OUTPUTS
Rx INPUT
Rx/Tx GAIN
CONTROL
B5
3
RSSI
RSSI
MUX
QMUX
34
B6
Rx/Tx GAIN
CONTROL
RXRF+
4
33
B7
Rx GAIN
CONTROL
RXRF-
5
90 °
TEMP SENSOR
RSSI
RSSI
MUX
32
RSSI
Tx
OUTPUT
Rx/Tx GAIN
CONTROL
Rx/Tx GAIN
CONTROL
Rx/Tx GAIN
CONTROL
B4
V CCTXPAD
B3
B2
TXRF+
6
7
8
9
10
IMUX QMUX
AM
DETECTOR
0 °
SERIAL
INTERFACE
SCLK
31
30
29
28
27
DIN
CS
DOUT
V CCVCO
BYPASS
SERIAL
INPUTS
SERIAL
INPUTS
SERIAL
OUTPUT
Rx/Tx GAIN
CONTROL
TXRF-
B1
11
12
SERIAL
INTERFACE
÷
CRYSTAL
OSCILLATOR/
BUFFER
÷
PLL
26
25
GNDVCO
ENABLE
MODE
CONTROL
13
14
15
16
17
18
19
20
21
22
23
24
SERIAL
INPUTS
REFERENCE
CLOCK BUFFER
OUTPUT
PLL LOOP
FILTER
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13