AK2346A Datasheet PDF - AKM
| Part Number | AK2346A | |
| Description | Two-way Radio Audio Processor | |
| Manufacturers | AKM | |
| Logo |  |
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ASAHI KASEI
[AK2346A]
AK2346A
Two-way Radio Audio Processor
1. Features
• Audio processing
• TX and RX amplifier
• Pre/De-emphasis circuit
• Compressor and Expander with no external components
• Scrambler and De-scrambler in frequency inversion type with 16 different carrier clocks
• Limiter with level adjuster
• Splatter filter for wide and narrow band
• Digital controlled amplifier for microphone, modulator and demodulator sensitivity
• 1200/2400bit/s MSK Modem with frame detection
• Wide range operation voltage: 2.6V to 5.5V, temperature: -40 to 85 °C
• Oscillator circuit for 14.7456MHz crystal
• Serial control interface operation
• Compact plastic packaging, 24-pin QFNJ (4.0 x 4.0 x 0.75mm 0.5mm pitch)
2. Description
AK2346A includes audio filter, limiter, splatter filter, Compandor, scrambler, MSK Modem, which is
highly integrated two-way radio baseband functions for FRS and LMR.
Audio high-pass filter shows a high attenuation in magnitude response characteristics less than
250Hz that supports to eliminate a sub-audio tone clearly.
TX limiter for deviation control has a limiting level adjuster controlled by a 4-bit signal level adjuster.
Splatter filter has the magnitude response for narrowband (fc=2.55kHz) and wideband (3.0kHz) to
meet various regulatory agencies in the world wide.
Compandor is no adjustment type because it includes all parametric components inside the chip.
Scrambler circuit is composed of frequency inversion circuit by double balanced mixer that has 16
different carrier clocks.
MSK Modem for data communication can be chosen either 2400bit/s or 1200bit/s. 2400bit/s data rate
provides a high speed data transmission and 1200bit/s supports a low BER (bit error rate)
performance that is suitable for under weak electrical field condition application.
There are four signal level adjusters for microphone, modulator and demodulator sensitivity by digital
controlled amplifier (volume).
MS1289-E-02
-1-
2 012/06
http://www.Datasheet4U.com
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ASAHI KASEI
[AK2346A]
Block Description
MSK BPF
MSK Demodulator
MSK Modulator
The Band-pass filter to eliminate the low and high frequency component for received MSK
signal.
The circuit to reproduce the 1200/2400bit/s receive clock and data from MSK signal at
RXIN pin.
The circuit to generate a MSK signal according to the received digital data from
MSKDATA pin.
AGND
The circuit to generate the reference voltage (1/2VDD) for internal analog signal.
OSC
DIV
Control
Register
The circuit to oscillate the 14.7456MHz reference clock with an external crystal oscillator
and resistor and capacitors.
The circuit to generate 1/2,1/3 or 1/4 frequency-divided output When a signal whose
frequency is twice, three times, or four times higher than 3.6864MHz is input from the
outside, this circuit divides the signal frequency by two, three, or four.
MCKSL[1:0] register is used to set this block.
The control register controls the status of internal switches and digitally controlled
amplifiers of IC by serial data that consists of 4 address bits and 8 data bits.
The data buffer stores 8 bits of the MSK received data to smooth the signal interface with
microprocessor.
At the start up, RSTN-pin is used for system reset. SRST register is used for software
reset. (Refer to the control register map)
6. Pin/Function
Package
Pin No
Name
1 MSKCLK
2 DIO DB
3 SC
4 DIR
LK
5 XO UT
6 XIN
7 D VDD
8 VS S1
9 A VDD
MS1289-E-02
Signal
Type
DO H
DI
DI
Conditions
at power
down
Z
Z
Z
Function
Clock input and output pin for MSK signal.
Serial data input and output pin.
Input for register setting data and output for MSK receive data.
Clock input pin for serial data I/O.
Serial data I/O control pin.
DO
DI
PWR
PWR
PWR
*2) Crystal oscillator connecting input pin.
Crystal oscillator connecting input and output pin.
To connect a 14.7456MHz crystal oscillator between this pin
*2)
and XOUT pin generates the reference clock internally.
In case of externally supplied clock operation, connect to this
pin. For more information, please refer to external application
circuits.
Digital VDD power supply pin.
-
Normally connect to 2.6V to 5.5V power-supply. Also this pin
must be decoupled to VSS pin by 0.1uF capacitor mounted
close to the device pins.
-
VSS power supply pin.
Normally supply 0V to this pin.
Analog VDD power supply pin.
Normally connect to 2.6V to 5.5V power-supply. Also this pin
- must be decoupled to VSS pin by 0.1uF capacitor mounted
close to the device pins.
Applied voltage must be DVDD ≤ AVDD
2 012/06
-5-
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AK2346A electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ AK2346A.PDF Datasheet ] | |
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