The AK3701 is suitable for the applications; automotive RKE systems for multi-channel.

The AK3701 achieves low power consumption adopting advanced architecture by direct conversion.  Furthermore, achieves both excellent receiver sensitivity and high ability to reject interference signal operating hopping channel and digital filter.

The AK3713 is suitable for the applications; automotive RKE systems.  The AK3713 is one-chip solution without MPU, no need for programming and high flexibility.  The AK3713 achieves low power consumption and high output efficiency.  Furthermore, achieves small drift of output power without depending on the cell battery voltage and temperature.

● Integrated EEPROM eliminates the need for microcontroller
The user can design a system without an external microcontroller by programming the integrated EEPROM.  Various messages can be transmitted using different combinations of the four switches.

● Low Current Consumption
The AK3713 contributes to longer battery life for battery-driven applications due to low stand-by current of 15nA (typ.) and low operating current of 11mA (typ.).

● Wide Output Power Range
Optimal output power range can be selected from -4dBm to +8dBm, (0.5dB steps), in accordance with the actual use case.  For example, current consumption is reduced when output power decreases and longer communication distance is achieved when output power increases.

● High Security with the AES-128 and Rolling Counter Process
High message transmission security is achieved via AES-128 encryption.  The receiver can identify the corresponding AK3713 via rolling counter values programmed in the EEPROM.

● Adaptable to a Variety of Wireless Systems
The AK3713 meets various system needs since Manchester / Bi-phase encoding and FSK / ASK modulation are available.

The AK1554E is transceiver IC optimized for ETC OBU.

Aside from a power amplifier and a low noise amplifier that are integrated in earlier product AK1553E, intermediate frequency (IF) filter function is added into the AK1554E. 

• The AK1554E is Optimized for ARIB STD-T75 Standard OBU
• Integrated power amplifier, Low noise amplifier and IF filter.
• Depending on insertion loss in RF cable, output power and receiver sensitivity are easily adjusted by registers.
• Integrated ASK Modem 
• Compatibility of AK1554 and AK1554E
• Communicate baseband signals by digital I/O interface
• 7. Single Power Supply: 3.15~3.45V

RF transceiver with integrated power amplifier for Chinese ETC
The proliferation of cars in China has had an increasing impact on traffic congestion and air pollution.
The AK1555 has been optimized for Chinese ETC terminals, and has reduced the need for external components by integrating an amplifier. This integration also allows for a wider variety of potential ETC terminal installations.

● Compatible with Chinese ETC standard GBT 20851-2007
The AK1555’s RF transmit power and receive sensitivity specifications meet the GBT 20851-2007 standard.

● Integrated power amplifier (PA) and low noise amplifier (LNA)
With the integration of over +10dBm transmit power and -75dBm (typ.) receive sensitivity amplifiers, external PAs and LNAs are eliminated.
The transmit output and receive sensitivity can be adjusted via configuration register, so the AK1555 can be used for both built-in antenna ETC and antenna-separated ETC.

● High suppression ratio characteristics to co-channel and adjacent channel waves
In Chinese ETC communication, the suppression ratio characteristics of RF transceiver are an important benchmark because the co-channel and adjacent channel signals act as disturbances to the communication channel.
The AK1555 has excellent characteristics, with a co-channel suppression ratio of 8dB (typ.) and adjacent channel suppression ratio of 8dB (typ).