Index > Product > Sub 1GHz Short Range Devices > A7159
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General Description
A7159 is a monolithic low-IF architecture CMOS FSK/GFSK TRX for wireless applications in the 315/433/470/510/868/ 915MHz ISM bands. This device provides direct spread spectrum communication whilst minimizing current consumption.
It is suitable for battery-powered application and the 470MHz ~ 510MHz wireless AMR (Auto Meter Reading) in China.

A7159 is one of AMICCOM’s Mini Power Consumption Family in sub 1GHz ISM band product line. A7159 is optimized for very low power consumption (i.e. 433MHz band, 4.2mA @ RX mode). In addition, A7159 can offer a very good link budget with a high efficient class-E power amplifier up to 20 dBm and a low high sensitivity receiver (-118dBm RX sensitivity @ 2Kbps / FSK / 433.92MHz in normal mode and -124dBm in DSSS mode). Therefore, A7159 is very suitable for battery powered application with a nice LOS (line-of-sight) wireless range.

A7159 incorporates a baseband modem with the programmable data rate divider from 2K to 250Kbps. The RF synthesizer contains a VCO and a low noise fractional-N PLL with an output channel frequency resolution of 366 Hz. The VCO frequency operates at to the wanted radio frequency to cover all RF band. Since A7159 is a low-IF architecture TRX with programmable IFBW, the RXLO shall be configured to offset an intermediate frequency (IF) to TXRF regarding to the IFBW setting.

A7159’s control registers are accessed via 3-wire or 4-wire SPI interface including TX/RF FIFO, VCO frequency, to chip calibration procedures. Another one, via SPI as well, is the unique Strobe command, A7159 can be controlled from power saving mode (deep sleep, sleep, idle, standby), PLL mode, TX mode and RX mode. In addition to SPI, the digital connections between A7159 and MCU are GIO1 and GIO2 (multi-function GPIO) to indicate A7159’s status so that MCU could use either polling or interrupt for radio control.

For packet handling, A7159 supports direct mode and FIFO mode. In direct mode, MCU or Encoder shall deliver the defined packet (preamble + sync word + payload) to GIO1 or GIO2/TXD pin. Then, in RX mode, MCU or Decoder can receive the coming packet (preamble + sync word + payload) in bit sequence from GIO1 or GIO2/RXD pin.

In FIFO mode, preamble is self-generated by A7159. User just needs to assign the sync word to this device by ID R/W command via SPI. For payload, the built-in separated 64-bytes TX/RX FIFO are used to be this purpose to let user R/W the wanted payload. User can also enable additional packet features like CRC for error detection, FEC (hamming 7 by 4) for 1-bit data correction per code word, Manchester coding, as well as data whitening for data encryption / decryption.

Additional device features such as on-chip regulator, RSSI for clear channel assessment, a thermal sensor, low battery detector, carrier detect, preamble detect, frame sync in FIFO mode, auto-ack and auto-resend, AIF (Auto IF function), AFC (Auto Frequency compensation), Auto calibration (VCO, IF Filter), PLL/CLK Generator, on-chip compensated capacitors of Xtal loading, and WOR (Wake on RX) to support the ability to periodically wake up from sleep mode to RX mode and listen for incoming packets without MCU interaction, can be used to simplify system development and cost. Overall, A7159’s highly integrated features and low current consumption offer a reduced BOM cost for a high performance ISM bands product. All features are integrated in a small QFN 4X4 24 pins package.
 Small size (QFN 4X4, 24 pins).
 Support DSSS RF Modulation format.
 144dB link budget for chips rate 2kcps, 433MHz
 Frequency band: 315/433/470/510/868/915 MHz.
 FSK and GFSK modulation.
 Programmable data rate from 2Kbps to 250Kbps.
 Programmable TX power level from –25 dBm to 20 dBm.
 On chip regulator, supports input voltage 2.2 ~ 3.6 V.
 Deep sleep current (0.1uA).
 Sleep current (2uA).
 Ultra Low Current Consumption
 RX Current consumption (AGC Off) 433MHz: 4.2mA.
 RX Current consumption (AGC Off) 868MHz: 5mA.
 TX Current consumption 433MHz: 70mA @ 19.5dBm.
 TX Current consumption 868MHz: 72mA @ 18.2dBm.

 Supports low cost crystal (12.8 / 16 / 19.2 MHz).
 AGC (Auto Gain Control) for the wide RSSI dynamic range.
 Programmable IF filter bandwidth (50KHz / 100KHz / 150KHz / 250KHz).
 High RX sensitivity, i.e. 433MHz.
 -118dBm at 2Kbps on-air data rate.
 -114dBm at 10Kbps on-air data rate.
 -110dBm at 50Kbps on-air data rate.
 -108dBm at 100Kbps on-air data rate.
 Easy to use
 Support 3-wire or 4-wire SPI.
 Unique Strobe command via SPI.
 AGC ON with 9-bits RSSI.
 AGC OFF with 8-bits RSSI.
 Auto Calibrations (VCO, IF Filter, RSSI).
 Auto IF function.
 Auto Frequency Compensation.
 Auto CRC Filtering.
 Auto FEC by (7, 4) Hamming code (1 bit error correction / code word).
 Clear channel assessment (CCA).
 Auto-resend (max 15 cycles).
 Auto-acknowledgement.
 Auto CSMA-CA.
 Manchester encoding.
 Programmable carrier sense indicator.
 Data Whitening for payload encryption and decryption.
 Separated 64 bytes RX and TX FIFO.
 Easy FIFO / Segment FIFO / FIFO Extension (16K bytes to infinite).
 Support FIFO mode with frame sync to MCU.
 Support direct mode with recovery clock output to MCU.
 Support DSSS RF Modulation format.

 HW AES128 to support CCM*(Level0, 4, 5, 6) security.
 Support ED (Energy Detect) for CCA.
 On chip 8-bits ADC.
 Low Battery indication.
 On-chip low power RC oscillator for WOT and WOR (Wake on TX/RX) function.
 ISM Band Data Communication
 Wireless Remote Controller
 RKE (Remote Keyless Entry)
 Building Automation
 Home Security
 Wireless Sensor Networking
 Energy Control and Management
 AMR (Auto Metering Reading)
Application Note
Reference circuit design (Module)
Reference code
Evaluation kit (EK)
Development Kit (DK)
Production test tool
*Please contact the agents or sales for more details