描述 Description

The AK2401A is a direct conversion transceiver that provides high performance narrow-band radio communication. The receiver block of the AK2401A integrates a LNA, I/Q demodulator, PGA and 24-bit delta-sigma ADC, and realizes both performances of high sensitivity and high tolerance to adjacent channel interference, intermodulation and blocking. Digital filter that is able to support channel selection for multiple radio systems, enabling simple system designing for a radio platform. The AK2401A also integrates a delta-sigma Fractional-N synthesizer that composes a high performance PLL with an external VCO. The transmission block has a DAC and a driver amplifier. The AK2401A is housed in a small QFN package (7mm x 7mm), realizing to downsize wire-less applications.

特性 Features

● No requirement for DSP programming for the DC offset in direct conversion systemThe DC offset is normally removed by the DSP in direct conversion.The AK2410A does not need external DSP programming for the DC offset since the integrated RDOC automatically eliminates the DC offset in real time.This is more effective in severe radio environments, improving the signal quality, (Bit Error Rate).● Support channel selection for multiple radio systemsThe programmable FIR filter is integrated in addition to ten kinds of standard channel filters with passband ranging from 2kHz to 60kHz.This variable bandwidth digital filter enables multi-platform system designs.● Improved characteristics compared to conventional productsLow Power Consumption:Reduced RX current consumption by 10% (typ. 52mA) *1High Blocking Performance:3dB higher blocking performance (typ. 96dB)*2Main Specifications·AK2401A：
·Operating Frequency：from 29MHz to 1200MHz；
·LNA：Gain 15dB, NF 1.2dB, IIP3 +7dBm；
·Direct Conversion I/Q Demodulator：Gain 42dB, NF 16dB, IIP3 +19dBm；
·24-bit ΔΣ A/D Converter：Up to 150kHz Output Sampling Frequency(TCXO=19.2MHz)；
·Band Changeable Digital Filter：Bandwidth can be set arbitrarily；
·Function：·Automatic Gain Control (AGC) function for LNA and PGA·Real-time DC Offset Canceller (RDOC)·RSSI: Data read by SPI communication；
·12-bit DAC：200kHz Max. Sampling Frequency, S/N 72dB：
·Transmission Driver Amplifier：?6 to +6 dBm Output；
·Local Signal Dividing Circuit：Divide by 2, 4, 8；
·TCXO Frequency：18.432MHz / 19.2MHz are recommended；
·Package：52-pin QFN (7×7×0.85mm 0.4 mm pitch)；
·Sales Status：Sampling；

應(yīng)用 Application

Narrow Band Radio Communication: 6.25kHz/7.5kHz/12.5kHz/15kHz/20kHz/25kHz/ 50kHz/100kHz/150kHz / etc. Modulation Method: FM/2FSK/4FSK/QPSK/?/4 DQPSK /16QAM/64QAM (Modulation / demodulation needs to be done externally. Modem function is not installed.) Analog/Digital Dual Mode Transceiver Digital Radio System for Industrial Use Public safety and Community/Emergency Radio System Convenience Transceiver Marine/Mobile Communication System Low power / Telemeter Transmitter Amateur Radio System