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AK2346B の電気的特性と機能

AK2346BのメーカーはAKMです、この部品の機能は「Two-way Radio Audio Processor」です。


製品の詳細 ( Datasheet PDF )

部品番号 AK2346B
部品説明 Two-way Radio Audio Processor
メーカ AKM
ロゴ AKM ロゴ 




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AK2346B Datasheet, AK2346B PDF,ピン配置, 機能
ASAHI KASEI
[AK2346B]
AK2346B
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
• Limiter with level adjuster
• Splatter filter for wide and narrow band
• Digital controlled amplifier for microphone, modulator and demodulator sensitivity
• 1200/2400bps MSK MODEM with frame detection
• Wide range operation voltage: 1.9V to 5.5V, temperature: -30 to 75 °C
• Oscillator circuit for 3.6864MHz crystal
• Serial control interface operation
• Compact plastic packaging, 24-pin SSOP
2. Description
AK2346B 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 under 250Hz
that supports to eliminate a subaudio tone clearly.
TX limiter for deviation control has a limiting level adjuster by applying a DC voltage via external
components. 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
3.388kHz carrier clock.
MSK MODEM for data communication can be chosen either 2400bps or 1200bps. 2400bps data rate
provides a high speed data transmission and 1200bps 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).
• Pin Assignment
MS1409-E-00
AGNDIN
AGND
TXIN
TXINO
L IM LV
EXTLIMIN
MOD
VSS
TCLK
T D ATA
DI/O
RDF/FD
1
2
3
4
5
6
7
8
9
10
11
12
-1-
24 TEST
23 RXI N
22 RXI NO
21 RXL PFO
20 RXA F
19 RXA FIN
18 EXPO UT
17 VDD
16 XIN
15 XO UT
14 DI R
13 SCL K
2 012/05
http://www.Datasheet4U.com

1 Page





AK2346B pdf, ピン配列
ASAHI KASEI
[AK2346B]
4. Block Diagram
TXIN
TXINO
RXIN
RXINO
RXLPFO
4
3-
+
VR1
(HPF)
Com-
pressor
TXA1
22 -6~+4.5/1.5dB
23 -
+
RXA1
21
VR3 RXLPF
-4~+3.5/0.5dB
TDATA
TCLK
10
9
DIR
SCLK
DI/O
RDF/FD
TEST
14
13
11 Control
12 Register
24
MSK
BPF
Pre-
Emphasis
MSK
Modulator
MSK
Demodulator
VDD
+
VSS
17
8
TX/RX
HPF
fc=300Hz
Scrambler
/De-
Scrambler
65
Limiter
VR2
Splatter
7
SMF
De-
Emphasis
-9.2~+3.0/0.2dB
fc=2.55kHz/
3.0kHz
Expan-
der
VR4
-18,-4.5~+4.5
/1.5dB
18
19
- 20
+
RXA2
16
OSC 15
MOD
EXPOUT
RXAFIN
RXAF
XIN
Power ON
Power ON Power ON Power ON
at Mode 1,2,3,4 at Mode 2,4 at Mode 3,4 at Mode 2,3,4
2
AGND
1
+
+
XOUT
AGND
AGNDIN
MS1409-E-00
-3-
2 012/05


3Pages


AK2346B 電子部品, 半導体
ASAHI KASEI
[AK2346B]
Package
Signal
Pin No Name Type
13 SCLK
I
14 DIR
I
15 XOUT
I
16 XIN
I/O
17 VD D
18 EXPOUT
19 RX AFIN
PWR
O
I
20 RX AF
O
21 RX LPFO
22 RXINO
23 RX IN
O
O
I
24 TE ST
I
Function
Clock input pin for serial data I/O.
Serial data I/O control pin.
Crystal oscillator connecting input pin.
Crystal oscillator connecting input and output pin.
To connect a 3.6864MHz crystal oscillator between this pin 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.
Positive power supply pin.
Normally connect to 1.9V to 5.5V noiseless power-supply. Also this pin must be
decoupled to VSS pin by 0.1uF capacitor mounted close to the device pins.
Expander and VR4 output pin.
Receive audio signal input pin.
This is the inverting input of RXA2. It composes a smoothing filter by external
resistor and capacitor.
Receive audio signal output pin.
This is the output pin of RXA2. Load impedance more than 10kΩ can be driven.
Receive LPF output pin.
This is a monitor pin for tone signal. 57.6kHz sampling-clock is included, so
please eliminate this signal component by LPF externally.
Load impedance more than 10kΩ can be driven.
RXA1 feedback output pin.
Demodulated audio signal input pin.
This is the inverting input of RXA1. It composes a pre-filter with external resistor
and capacitor.
Test register control input pin.
When this pin set to high level, test register is controllable. Please set to low
level or open for normal operation.
MS1409-E-00
-6-
2 012/05

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
AK2346A

Two-way Radio Audio Processor

AKM
AKM
AK2346B

Two-way Radio Audio Processor

AKM
AKM


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