AK2404

Part: AK2404

Type: Direct Conversion Transceiver (narrowband RF transceiver)

Description: 45–960 MHz direct conversion transceiver with integrated LNA, quadrature demodulator, PGA, 24-bit ΔΣ ADC, digital filter, 23-bit fractional-N PLL synthesizer, 12-bit DAC and transmit driver amplifier, for high-performance narrowband radio.

Operating Conditions:

• Supply voltage: 2.7–3.45 V (IOVDD: 1.7–1.9 V, or 2.7–3.45 V)
• Operating temperature: -40 to +85 °C
• Operating frequency: 45 MHz to 960 MHz
• Recommended TCXO frequency: 18.432 / 19.2 / 24.576 MHz

Key Specs:

• Operating frequency: 45 MHz to 960 MHz
• Blocking characteristics at Δ10 MHz: over 100 dB (TIA603, EN 300 086-1)
• ADC: 24-bit ΔΣ, up to 192 kHz output sampling rate (TCXO = 24.576 MHz)
• DAC: 12-bit, 96 kHz max sampling rate, S/N 72 dB
• Transmit drive amplifier output: -10 to +2 dBm
• PLL: 23-bit ΔΣ fractional-N synthesizer (external VCO)
• Supported channel spacings: 6.25 / 7.5 / 12.5 / 15 / 20 / 25 kHz etc.

Features:

• LNA, attenuator (ATT) and PDET for interference detection
• Automatic PGA gain control for high dynamic range
• High-linearity direct conversion I/Q demodulator
• Band-changeable digital filter with arbitrarily settable FIR coefficients
• RSSI via SPI read and analog voltage output
• FM detection circuit and noise squelch function
• Zero-IF and Very Low IF support
• Real-time DC offset canceller (RDOC) and HPF
• Modulation data input suitable for 2-point modulation for FM/FSK
• Local signal dividing circuit and poly phase filter
• Clock rate converter

Applications:

• Narrowband radio communications
• Analog/digital dual-mode transceivers
• Digital radio systems for industrial use
• Public safety and community/emergency radio systems
• Convenience transceivers
• Marine/mobile communication systems
• Low-power / telemeter transmitters
• Amateur radio systems

Package:

• 68-pin QFN (8×8 mm, 0.4 mm pitch)

• ◼ Features

• Operating Frequency: 45MHz to 960MH

• Power Supply: 2.7 to 3.45V (IOVDD: 1.7 to 1.9V also used 2.7 to 3.45V)

• Operational Temperature: -40 to +85°C

• LNA, Attenuator (ATT) and PDET for interference detection

• Automatic PGA gain control function for high dynamic range

• High Linearity Direct Conversion I/Q Demodulator

• 24-bit ΔΣ A/D Converter: up to 192kHz Output Sampling Rate (TCXO=24.576MHz)

• Band Changeable Digital Filter (The FIR filter coefficients can be set arbitrarily)

• RSSI Functions: Data read by SPI and Analog voltage output

• FM Detection Circuit and Noise Squelch Function

• Support Zero IF and Very Low IF architecture

• DC Offset Cancelation: Real-time DC Offset Canceller (RDOC) Function and HPF

• 23- bit ΔΣ Fractional -N PLL Synthesizer

• Modulation data input interface suitable for 2-point modulation for FM/FSK applications

• 12-bit D/A Converter: 96kHz Max. Sampling Rate, S/N 72dB

• Transmission Drive Amplifier: -10 to +2dBm Output

• Local Signal Dividing Circuit and Poly Phase Filter

• TCXO Frequency: 18.432MHz / 19.2MHz / 24.576MHz recommended

• Clock Rate Converter

• Package: 68-pin QFN (8×8mm, 0.4 mm pitch)

• ◼ Applications

• Narrow Band Radio Communications: 6.25kHz / 7.5kHz / 12.5kHz / 15kHz / 20kHz / 25kHz etc.

• Modulation Method: FM / 2FSK/ 4FSK / QPSK / /4 DQPSK / 16QAM

(The demodulation needs to be externally executed except the FM modulation.)

• Analog/Digital Dual Mode Transceiver

• Digital Radio System for Industrial Use

• Public Safety and Community/Emergence Radio System

• Convenience Transceiver

• Marine/Mobile Communication System

• Low power / Telemeter Transmitter

• Amateur Radio System

220900015-E-04 2023/04

• ◼ Features

• Operating Frequency: 45MHz to 960MH

• Power Supply: 2.7 to 3.45V (IOVDD: 1.7 to 1.9V also used 2.7 to 3.45V)

• Operational Temperature: -40 to +85°C

• LNA, Attenuator (ATT) and PDET for interference detection

• Automatic PGA gain control function for high dynamic range

• High Linearity Direct Conversion I/Q Demodulator

• 24-bit ΔΣ A/D Converter: up to 192kHz Output Sampling Rate (TCXO=24.576MHz)

• Band Changeable Digital Filter (The FIR filter coefficients can be set arbitrarily)

• RSSI Functions: Data read by SPI and Analog voltage output

• FM Detection Circuit and Noise Squelch Function

• Support Zero IF and Very Low IF architecture

• DC Offset Cancelation: Real-time DC Offset Canceller (RDOC) Function and HPF

• 23- bit ΔΣ Fractional -N PLL Synthesizer

• Modulation data input interface suitable for 2-point modulation for FM/FSK applications

• 12-bit D/A Converter: 96kHz Max. Sampling Rate, S/N 72dB

• Transmission Drive Amplifier: -10 to +2dBm Output

• Local Signal Dividing Circuit and Poly Phase Filter

• TCXO Frequency: 18.432MHz / 19.2MHz / 24.576MHz recommended

• Clock Rate Converter

• Package: 68-pin QFN (8×8mm, 0.4 mm pitch)

• ◼ Applications

• Narrow Band Radio Communications: 6.25kHz / 7.5kHz / 12.5kHz / 15kHz / 20kHz / 25kHz etc.

• Modulation Method: FM / 2FSK/ 4FSK / QPSK / /4 DQPSK / 16QAM

(The demodulation needs to be externally executed except the FM modulation.)

• Analog/Digital Dual Mode Transceiver

• Digital Radio System for Industrial Use

• Public Safety and Community/Emergence Radio System

• Convenience Transceiver

• Marine/Mobile Communication System

• Low power / Telemeter Transmitter

• Amateur Radio System

220900015-E-04 2023/04

Figure 2 Pin Configurations (68-pin QFN0808, Top View)