AX5043-QFN28-TU AXSEM, AX5043-QFN28-TU Datasheet - Page 22

• Manufacturer Part Number: AX5043-QFN28-TU
• Description: RF Transceiver Narrow-Band-IC
• Manufacturer: AXSEM

Specifications of AX5043-QFN28-TU

• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 70 MHz to 1050 MHz
• Interface Type: SPI
• Output Power: 18 dBm to 22 dBm
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Maximum Supply Current: 60 mA
• Minimum Operating Temperature: - 40 C
• Modulation: ASK, FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22
Circuit Description
5 .
C i r c u i t D e s c r i p t i o n
The
AX5043
is a true single chip low-power narrow-band CMOS transceiver primarily for use in
SRD bands. The on-chip transceiver consists of a fully integrated RF front-end with modulator, and
demodulator. Base band data processing is implemented in an advanced and flexible
communication controller that enables user-friendly communication via the SPI interface.
AX5043
can be operated from a 1.8 V to 3.6 V power supply over a temperature range of
o
o
-40
C to 85
C, it consumes 7 - 70 mA for transmitting, depending on the output power, and 9 - 11
mA for receiving.
The
AX5043
features make it an ideal interface for integration into various battery powered SRD
solutions such as ticketing or as transceiver for telemetric applications e.g. in sensors. As primary
application, the transceiver is intended for UHF radio equipment in accordance with the European
Telecommunication Standard Institute (ETSI) specification EN 300 220-1 and the US Federal
Communications Commission (FCC) standard Title 47 CFR part 15 as well as Part 90.
AX5043
is
compliant with the respective narrow-band regulations.
AX5043
supports any data rate from 1 kbps to 100 kbps for FSK, GFSK, GMSK , MSK and ASK. To
achieve optimum performance for specific data rates and modulation schemes several register
settings to configure the
AX5043
are necessary. To calculate the optimal settings use the AXSEM
AX5043
configuration software.
The
AX5043
can be operated in two fundamentally different modes.
In frame-mode data is sent and received via the SPI port in frames. Pre- and post-ambles as well
as checksums can be generated automatically. Interrupts control the data flow between a micro-
controller and the AX5043.
In wire-mode the IC behaves as an extension of any wire. The internal communication controller is
disabled and the modem data is directly available on a dedicated pin (DATA). The bit clock is also
output on a dedicated pin (DCLK). In this mode, the user can connect the data pin to any port of a
micro-controller or to a UART, but has to control coding, checksums, pre and post ambles. The user
can choose between synchronous and asynchronous wire-mode, asynchronous wire-mode performs
RS232 start bit recognition and re-synchronization for transmit.
Both modes can be used both for transmit and receive. In both cases, the
AX5043
behaves as a
SPI slave interface. Configuration of the
AX5043
is always done via the SPI interface.
The receiver and the transmitter support multi-channel operation for all data rates and modulation
schemes.
Version 0.2
Preliminary
Datasheet AX5043