TH7120 Datasheet, PDF (8/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7120
300 to 930MHz
FSK/FM/ASK Transceiver
Stand-Alone Fixed-Frequency Operation
After power up the transceiver is set to fixed-frequency mode. In this mode, pins FS0/SDEN and FS1/LD
must be connected to V_EE or V_CC to set the desired frequency of operation. The logic levels at pins FS0/SDEN
and FS1/LD must not be changed after power up in order to remain in fixed-frequency mode. The default
settings of the control word bits in stand-alone mode are described in the frequency selection table.
Frequency Selection
Channel frequency
433.92 MHz 868.3 MHz
315 MHz
915 MHz
FS0/SDEN
1
0
1
0
FS1/LD
0
0
1
1
PRELIMINARY ^{Reference oscillator frequency}
R counter ratio in RX mode
PFD frequency in RX mode
N/A counter ratio in RX mode
VCO frequency in RX mode
RX frequency
R counter ratio in TX mode
PFD frequency in TX mode
N/A counter ratio in TX mode
VCO frequency in TX mode
TX frequency
IF frequency in RX mode
16
446.91 kHz
947
423.22 MHz
433.92 MHz
16
446.91 kHz
971
433.92 MHz
433.92 MHz
10.7 MHz
7.1505 MHz
16
18
446.91 kHz 397.25 kHz
1919
766
857.60 MHz 304.30 MHz
868.30 MHz 315.00 MHz
16
18
446.91 kHz 397.25 kHz
1943
793
868.30 MHz 315.00 MHz
868.30 MHz 315.00 MHz
10.7 MHz
10.7 MHz
30
238.35 kHz
3794
904.30 MHz
915.00 MHz
30
238.35 kHz
3839
915.00 MHz
915.00 MHz
10.7 MHz
3901007120
Rev. 005
Page 8 of 28
Data Sheet
Jan. 2002