Professional Computer Technology Limited. A710820D 用户手册
PCT-A7108-20D RF module Reference Manual
September., 2013, Version 0.7
Professional Computer Technology
Limited.
2
Overview
PCT 433MHz -15dBm module is designed for low cost 433MHz ISM band wireless applications using
AMICCOM A7108 FSK transceiver. This module features a fully programmable frequency synthesizer by
SPI. The maximum data rate is 250kbps. Maximum output power is -15dBm.
SPI. The maximum data rate is 250kbps. Maximum output power is -15dBm.
A7108 is a monolithic low-IF architecture CMOS FSK/GFSK TRX for wireless applications in the 433MHz ISM bands. In addition,
this device is especially suitable for the 470MHz wireless AMR (Auto Meter Reading) in China.
A7108 is one of AMICCOM’s high performance Sub 1GHz family chips. This device offers a low cost solution with advanced
radio features such as high output power amplifier up to
-15 dBm (433MHz band, excluding LPF and HPF) and low phase noise
receiver (- 114 dBm @ 10Kbps, -110dBm @50Kbps). Therefore, A7108 is very suitable for long LOS (line-of-sight) applications
without the need to add an external LNA or PA.
The on-chip data rate divider supports programmable on-air data rates from 2K to 250Kbps to satisfy different system
requirements. For a battery powered system, A7108 supports fast PLL settling time (35 us), XTAL settling time (500 us) and
on-chip Regulator settling time (450 us) to reduce average power consumption.
For packet handling, A7108 supports direct mode as well as FIFO mode. In the RX direct mode, GIO1 or GIO2 can be serially
output the raw data from the digital demodulator. In the TX direct mode, MCU can serially feed the digital data to GIO1 or GIO2
which is connected to the modulator. In the other hand, a packet in FIFO mode, the preamble is self-generated and the physical
packet ID is programmable up to 8 bytes. The built-in separated 64-bytes TX/RX FIFO is treated as payload for data buffering
including CRC of error detection, FEC of error correction, data whitening for data encryption / decryption, and Manchester
encoding.
Additional device features such as on-chip regulator, low battery detect, carrier detect, preamble detect, frame sync in FIFO
mode, AGC (Auto Gain Control), AFC (Auto Frequency compensation), Auto calibration (VCO and IF Filter), programmable IF
Filter, multi Xtal sources, on-chip Xtal compensated capacitors, and RSSI for the clear channel assistance are used to simplify
system development and cost. Overall, A7108 is a high performance and a highly integrated ISM bands TRX with low BOM cost.
1.Features:
•Small size (19*18mm, 10 pins).
• Frequency band: 433MHz.
• FSK and GFSK modulation.
• Supports 3-wire or 4-wire SPI.
• Deep sleep current (0.2uA).
• Low sleep current (2 uA).
•TX Current consumption 433MHz: 30mA @ 10dBm, 70mA @ 17dBm.
• On chip regulator, supports input voltage 3.3V .