AMIS-52150
Low-Power Transceiver with Clock and Data Recovery
Data Sheet
8.11 VDD, Supply Voltage Pin
The VDD pin is the power supply pin for the AMIS-52150. The voltage on this pin is typically 3.0V. Please refer to the section
“Operating and Maximum Specifications” of this document for the VDD operating conditions.
8.12 RFPWR, DC Voltage Output Pin
In the AMIS-52150, a regulated DC voltage is generated and outputted at the RFPWR pin. This voltage should be fed through a DC
connection to the RFOUT pin in order to power the output stage of the RF PA. The voltage level is adjusted based on the value of the
register setting, as shown in Table 19.
Table 19: TX Voltage Control Register
RFPWR Voltage Control Register
Register (HEX)
Name
RFPWR trim
Bits
All
States Comments
0xff is highest power
0x02
8.13 RFOUT, RF Output Signal Pin
In the AMIS-52150, a high efficiency non-linear output driver is used to produce the high power RF signal. This driver must be
connected through a DC connection to the RFPWR pin. External components are required to match the output to a 50Ω load, or to an
external antenna, respectively.
Figure 6 shows a typical matching circuit for the RFOUT pin.
8.14 RFGND, RF Ground Pin
The RFGND pin is the ground connection for the RF circuits in the device.
Figure 6: Typical RFOUT Output Impedance Match to 50Ω (402MHz)
AMI Semiconductor – Apr. 07 – M-20535-006
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