A7139: Wireless transceiver chip A7139 original spot. Company advantage inventory.

1. Typical application

?ISM band data communication

wireless remote

?RKE (Remote Keyless Entry)

?Building Automation

? Home Security

?wireless sensor network

?Energy control and management

?AMR (Automatic Meter Reading)

2. Overview

The A7139 is a monolithic low-IF architecture CMOS FSK/GFSK TRX for wireless applications in 315/433/470/868/

915MHz ISM band. This device is especially suitable for battery powered applications and applications from 470MHz to 510MHz

Wireless AMR (automatic meter reading) in China and 868.3MHz wireless M-bus in Europe.

The A7139 is one of the miniature power consumption series in AMICCOM's sub-1GHz ISM band product line. A7139 is optimized

Very low power consumption (ie 434MHz band, 3.8mA @ RX mode). Also, A7139 can provide a good link

High-efficiency class-E power amplifier with up to 20dBm and low phase noise receiver (-107dBm RX

Sensitivity @ 100Kbps/FSK/433.92MHz). Therefore, the A7139 is ideal for battery powered applications

LOS (Line of Sight) wireless range.

The A7139 integrates a baseband modem with a programmable data rate divider from 2K to 250Kbps. for battery

Supported systems, A7139 supports fast PLL settling time, Xtal settling time and on-chip regulator settling time to reduce

Average power consumption. RF synthesizer consists of a VCO and a low noise fractional-N PLL with output

The channel frequency resolution is 366 Hz. The VCO frequency operates at the desired RF frequency to cover all RF

bring. Since the A7139 is with programmable IFBW (IF filter bandwidth,

50KHz/100KHz/150KHz/250KHz), RXLO must be configured to offset an intermediate frequency (IF) to TXRF

About IFBW settings.

The control registers of the A7139 are accessible via a 3-wire or 4-wire SPI interface, including TX/RF FIFO, VCO frequency,

Chip calibration procedure. The other, also via SPI, is the only Strobe command that can control the A7139 with:

Power saving modes (deep sleep, sleep, idle, standby), PLL mode, TX mode and RX mode. Except SPI, digital

The connection between the A7139 and the MCU is GIO1 and GIO2 (multi-function GPIO) to indicate the status of the A7139 so that the MCU can

Radio control can be done using polling or interrupts.

For packet processing, the A7139 supports direct mode and FIFO mode. In direct mode, the MCU or encoder should provide

Defined packet (preamble + sync word + payload) to GIO1 or GIO2/TXD pins. Then, in RX mode, the MCU or decoder can

The incoming packet (preamble + sync word + payload) is received in bit order from the GIO1 or GIO2/RXD pins.

In FIFO mode, the preamble is automatically generated by the A7139. The user only needs to assign the sync word to the device via ID R/W

For payload via SPI commands, a built-in split 64-byte TX/RX FIFO is used for this purpose to allow user to read and write

desired payload. User can also enable other packet features such as CRC for error detection, FEC (Hamming 7 by 4)

1-bit data correction for each codeword, Manchester encoding, and data whitening for data encryption/decryption.

Additional device features such as on-chip voltage regulator, RSSI for clear channel evaluation, thermal sensor, low battery

Detector, Carrier Detect, Preamble Detect, Frame Synchronization in FIFO Mode, Auto Ack and Auto Retransmission, AIF (Auto IF Function),

AFC (Auto Frequency Compensation), Auto Calibration (VCO, IF Filter), PLL/CLK Generator, On-Chip Compensation

Xtal load capacitance and WOR (RX wakeup) support periodic wakeup from sleep mode to RX

mode and listening for incoming packets without MCU interaction can be used to simplify system development and reduce costs.

Overall, the highly integrated features and low current consumption of the A7139 reduce BOM cost, enabling high cost

Performance ISM Band Products. All functions are integrated in a small QFN 4X4 24-pin package.

3. Features

Small size (QFN 4X4, 24 pins).

? Frequency band: 315/433/470/510/868/915MHz.

?FSK and GFSK modulation.

? Programmable data rate from 2Kbps to 250Kbps.

? Programmable TX power levels from -34dBm to 20dBm.

? On-chip voltage regulator, support input voltage 1.9 ~ 3.6V.

? Deep sleep current (0.3uA).

? Sleep current (1.5uA).

?Ultra low current consumption

RX current consumption (AGC off) 434MHz: 3.8mA.

A7108

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A71X25AQFI/Q

A7139