AMIS-52100 Datasheet, PDF (13/26 Pages) AMI SEMICONDUCTOR – Transceiver with Clock and Data Recovery

AMIS-52100 Low-Power Transceiver with Clock and Data Recovery
Table 21: RF Input Electrical Characteristics
Specificatio Settings
Conditions
n
Input
Resistance
Input
Trim 0x00 Min. tune
Capacitance Trim 0xff
Max. tune
Sensitivity
1 Kbps
Frequency
Max Input
IP3
IP2
Typ.
2
3
6
-117
403.5
+8
+66
Max. Units
KΩ
pFarads
pFarads
dBm
MHz
-10
dBm
dBm
dBm
Comments
w/CDR
Target frequency
Data Sheet
Figure 7: Received Waveform
9.2 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. The 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 circuit includes a parallel LC tank (Lp and
Cp) tuned to 402MHz (including internal capacitance) and a series LC (Ls and Cs) to produce a 403MHz output while reducing the
harmonics. The transmitter requires that the output power level be programmed, the transmit frequency be tuned and the data rate be
selected as shown in the registers of Table 23 lists some characteristic parameters for the transmitter.
Figure 8 shows what the transmit output waveform could look like.
AMI Semiconductor – Rev 4.0, Mar. 06 – M-20535-004
13
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