AMIS-53000 Datasheet, PDF (57/99 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53000 Frequency Agile Transceiver
Data Sheet
Clock Recovery Loop Filter Setting
A program (AMIS-53CALC.exe available from AMIS) has been created to aid in the design of the CDR loop filter settings.
Table 43: Clock Recovery Loop Filter Setting - 0X2C [44]
Bit Name
Comment
7:0 _{CDR_CO [7:0]}
Clock recovery filter setting
6.6 Transmitter
Figure 39: Typical Output Power vs. Power Register Setting*
*Note: Curve is for output matched to 50Ω.
Table 44: Transmit Command
Register
Number (HEX) Name
0X00
Command
Code
0X02
Function
Instruction to place the AMIS-53000 into transmit
(remember that all parameters for transmit must be set before issuing
this command)
The AMIS-53000 uses a switching class E power amplifier as the high power output driver. The high power PA can be bypassed to
allow a high efficiency at a lower output power. The output drivers are turned on and off directly in AM/OOK/ASK data modulation. A
direct modulation PLL is used to form the FM/FSK signal for transmission. The PLL loop runs at half of the desired transmit frequency
to provide excellent on/off ratio for AM, and to lower current consumption in the PLL.
OOK modulation (AM)
FSK modulation (FM)
Burst mode transmit
FM wave shaping
High power and low power range
Setup registers descriptions:
AMI Semiconductor – Aug. 05, Rev. 1.0
57
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