AMIS-52000 Datasheet, PDF (10/15 Pages) AMI SEMICONDUCTOR – Single-Chip Radio Transceiver

AMIS-52000 Single-Chip Radio Transceiver
Data Sheet
Table 15: RFIN Characteristics
Specification
Input Resistance
Input Capacitance
Input Resistance
Input Capacitance
Input Sensitivity
Input Noise Figure
Freq Range
RF Input
IP3
IP2
Settings
RX trim 0x00
RX trim 0x00
RX trim 0xff
RX trim 0xff
Conditions
Trim set minimum
Trim set minimum
Trim set maximum
Trim set maximum
Max RF signal input
Min Typ Max Units
2K
Ω
3
pF
2K
Ω
6
pF
-103
dBm
3
3
6
dB
260 433 700 MHz
-10 dBm
+8
dBm
+66
dBm
RFOUT, RF Output Impedance
The RF transmitter output pin is RFOUT. This is an open
drain output. It requires a DC signal path to RFPWR, which is
the output of the internal power supply to the transmitter.
The transmitter output requires a tuned resonant circuit
externally to form the desired waveform. This resonant
circuit should be resonant at the desired output frequency.
The transmitter output also requires filtering to reduce the
harmonics to acceptable levels. The following circuit is a
suggestion for matching the output to 50Ω at 433.92MHz.
The circuit includes a tuned parallel LC tank at the
433.92MHz (including internal capacitance) and an LC notch
filter at the third harmonic.
Figure 6 – 433.92MHz Typical Match to 50Ω
Table 16: RFOUT Characteristics
Specification
Output Resistance
Output Capacitance
Output Resistance
Output Capacitance
Harmonics
Freq Range
Freq Range
Modulation
On/Off Ratio
Output Power
Output Power
Settings
Conditions
Min Typ
Max Units
TX PC 0x00
22
Ω
TX PC 0x00
3
pF
TX PC 0xff
TBD
Ω
TX PC 0xff
TBD
pF
TX PC 0xff With typical match circuit
-35
dBc
Transmit
260 433.92
700 MHz
Transmit
Fast start crystal circuit
350 433.92
480 MHz
ASK/OOK
60
dB
TX PC 0x00 With typical match circuit
-24
dBm
TX PC 0xff With typical match circuit
6
dBm
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