AMIS-52150 Datasheet, PDF (10/21 Pages) AMI SEMICONDUCTOR – Low-Power Transceiver with Clock and Data Recovery

AMIS−52150
Table 15. RECEIVER CONTROL REGISTERS
RX1 or RX2 Receiver Register Control
Register (HEX)
Name
Bits
States
Comments
0x00
ANT1 Trim
All
Inverse Relationship Register Value to Internal Capacitance
0x01
ANT2 Trim
All
Inverse Relationship Register Value to Internal Capacitance
0x05
RX XTAL Tune
All
0x0a
Data Threshold
All
Reference Level for Detecting Data Logic State
0x0c
ANT1 Enable
0
0
Antenna Port is Off
1
Antenna Port is On
ANT2 Enable
1
0
Antenna Port is Off
1
Antenna Port is On
RX Enable
3
0
Receiver is Off
1
Receiver is On
0x0f
Data Filter
4, 5, 6
000
1.1 kHz
001
2.3 kHz
010
5.2 kHz
011
10.4 kHz
100
1.18 kHz
101
2.57 kHz
110
7.0 kHz
111
20.45 kHz
0x1e
TX/RX Invert
5
0
Normal Levels
1
Inverted
Table 16. RF INPUT ELECTRICAL CHARACTERISTICS
Specification
Settings
Conditions
Input Resistance
Input Capacitance
Trim 0x00
Min. Tune
Trim 0xff
Max. Tune
Sensitivity
1 kbps
Frequency
Max. Input
IP3
IP2
Typ
Max
2
−
3
−
6
−
−117
−
403.5
−
−
−10
+8
−
+66
−
Unit
kW
pF
pF
dBm
MHz
dBm
dBm
dBm
Comments
w/CDR
Target Frequency
Transmitter
The RF transmitter is a non-linear open drain device. It
requires a DC signal path to RFPWR, which is the output of
the internal power supply to the transmitter. The transmitter
is switched On and Off with the serial transmit data stream.
To achieve the desired output waveform, a tuned external
resonant circuit is required. This resonant circuit should be
designed to achieve the desired output frequency. This
circuit includes a parallel LC tank (Lp and Cp) tuned to
402 MHz (including internal capacitance), as well as a series
LC (Ls and Cs) to produce a 403 MHz output. The
transmitter output is also to be filtered in order to reduce the
harmonics to acceptable levels. It is further required that the
transmitter output power level is programmed, that the
transmit frequency is tuned and that the data rate is selected,
respectively (Table 17).
Table 18 lists some characteristic parameters for the
transmitter, while a typical transmitter output waveform is
shown in Figure 7.
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