TH7122 Datasheet, PDF (31/44 Pages) Melexis Microelectronic Systems – 27 to 930MHz FSK/FM/ASK Transceiver

TH7122
27 to 930MHz
FSK/FM/ASK Transceiver
7 Application Circuit Examples
7.1 FSK Application Circuit Programmable User Mode (internal AFC option)
CF2 ^CF1
RX_IN
TX_OUT
CB2
LTX0
CTX0
Combining
network
CRX0
C2
L1
C1
CB1
RB1
RPS
CTX4
RF _CB6
C0
L0
Lock
detect
25 _{OUT_PA}
26 IN_LNA
27 VEE_LNA
SDEN
16
RE/SCLK 15
VCC_DIG 14
SDTA
SCLK
CB7
3wire bus
28 OUT_LNA
29 GAIN_LNA
30 IN_MIX
TH7122
ASK/FSK 13
IN_DTA 12
FSK_SW 11
FSK
CX2 ^input
31 VEE_IF
OUT_MIX
32
12
CB5
345
C3
67
C4
RO 10
9
XTAL ^CX1
VEE_RO
8
RSSI
FSK
output
C5
CB0
RP
CB4
VCC
Fig. 14: Test circuit for FSK operation in Programmable User Mode (internal AFC option)
39010 07122
Rev. 008
Page 31 of 44
Data Sheet
June/07