Datasheet.kr   

AK2347B 데이터시트 PDF




AKM에서 제조한 전자 부품 AK2347B은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 AK2347B 자료 제공

부품번호 AK2347B 기능
기능 Two-way Radio Audio & Sub-Audio Processor
제조업체 AKM
로고 AKM 로고


AK2347B 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 30 페이지수

미리보기를 사용할 수 없습니다

AK2347B 데이터시트, 핀배열, 회로
ASAHI KASEI
[AK2347B]
AK2347B
Two-way Radio Audio & Sub-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 (3.388kHz or 3.290kHz)
• Limiter with level adjuster
• Splatter filter for wide and narrow band
• Digital controlled amplifier for microphone, modulator and demodulator sensitivity
• Sub-Audio filter with level adjuster for CTCSS and DCS
• Low power supply operation: 2.7 to 3,3V
• Wide range operating for temperature: -40 to 85 °C
• Oscillator circuit for 3.6864MHz and 3.579545MHz crystal
• Serial control interface operation
• Compact plastic packaging, 24-pin SSOP
2. Description
AK2347B includes audio filter, limiter, splatter filter, compandor, scrambler, 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 and 3.290kHz carrier clock.
Sub-Audio filter with level adjuster is available for pre- or post-filter for CTCSS and DCS.
There are four signal level adjusters for microphone, modulator and demodulator sensitivity by digital
controlled amplifier (volume).
• Pin Assignment (Top view)
MS1419-E-00
AGNDIN
AGND
TXINO
TXIN
EXTIN
EXTINO
L IM LV
MOD
VSS
SDATA
SCLK
CSN
1
2
3
4
5
6
7
8
9
10
11
12
24 RXIN
23 RX INO
22 FI LTERO
21 RX OUT
20 DINO
19 DIN
18 RSAO UT
17 TSAO UT
16 VD D
15 XO UT
14 XIN
13 TEST
-1-
2 012/05
http://www.Datasheet4U.com




AK2347B pdf, 반도체, 판매, 대치품
ASAHI KASEI
[AK2347B]
Block Fun
TXA1
VR1
(HPF)
Compressor
Pre-emphasis
TX/RX_HPF
Scrambler/
Descrambler
TXA2
Adder
Limiter
VR2
Splatter
SMF
RXA1
VR3
RXLPF
De-emphasis
Expander
VR4
5. Block Functions
ction
Operational amplifier for gain adjustment of transmit audio signal and for the filter for
preventing aliasing noise of the SCF circuit in the subsequent stage. Use external
resistors and capacitors to set the gain to 30dB or less and the cut-off frequency to
around 10kHz.
This circuit controls the volume for adjusting the input level of transmit audio signal.
Setting registers: VR12 to VR10, adjustment range: -6.0dB to +4.5dB in 1.5dB steps
This circuit compresses the amplitude of transmit audio signal by 1/2 in dB scale.
Cross-point: -10dBx. This circuit is turned on and off by the TC register.
This circuit emph asizes the high-frequency com ponent of tra nsmit au dio signal to
improve the S/N ratio of the modulation signal.
High-pass filter to eliminate low-frequency components lower than 250Hz which are
included in transmit and receive audio signals. This circuit is turned on and off by the
HPF register.
This circuit in verts the spectrum di stribution of transmit and re ceive audio si gnals with
respect to the carrier frequency.
The carrier frequency is 3.388kHz or 3.290kHz.
The Scrambl er/Descrambler or emp hasis ci rcuit ca n be sele cted using the EM and
PCONT registers. These circuits cannot be used at the same time.
Operational amplifier for gain adju stment of external tone signal. Use external re sistors
and capacitors to set the gain to 0dB or less and the cut-off frequency to around 10kHz.
This circuit adds together the audio signal and external tone in put signal. Thi s circuit is
controlled by the TXSW2 and TXSW1 register.
Amplitude limiting circuit to suppress frequency deviation in the modulation signal.
The limit leve l can be adjusted by a pplying a DC voltage to the LIMLV pin. When the
pin is left open, the level pred etermined within the device is output. This circuit is turned
on and off by the LMT register.
This circuit controls the volume for adj usting the ou tput level on the MOD pin. Setting
registers: VR25 to VR20, adjustme nt ran ge: -3.2dB to +3.0dB in 0.2dB step s. For
coarse adjustment, switching between -6.4dB and 0dB is possible.
Low-pass filt er to eli minate high -frequency components hig her than 3 kHz which a re
included in the limiter output signal. The cut-off frequency can be adjusted with the SPL
register.
Smoothing filter to eliminate the hi gh-frequency and clock components generated in th e
SCF circuit.
Operational amplifier for gain adjustment of the receive demodulation signal and for the
filter for preventing aliasing noise in the SCF circuit in the subsequent stage. Use
external resistors and capacitors to set the gain to 20dB or less and the cut-off frequency
to around 40kHz.
This circuit controls the v olume for adjusting the input level of the re ceive demodulation
signal.
Setting registers: VR33 to VR30, adjustment range: -4.0dB to +3.5dB in 0.5dB steps
Low-pass filt er to eli minate high -frequency components hig her than 3 kHz which a re
included in the receive demodulation signal.
This ci rcuit resto res the origin al state of the signal of which high -frequency compo nent
has been emphasized by the Pre-emphasis.
This circuit e xpands the signal compressed twi ce by the Comp ressor in dB scale to
restore the original signal state.
Cross-point: -10dBx. The Expander is turned on and off with the TC register.
This circuit controls the volume for adjusting the RX output level.
Setting regi sters: VR45 to VR40 Adjustme nt ran ge: -18.0dB, -4.5dB to +4.5dB in
0.25dB steps
MS1419-E-00
-4-
2 012/05

4페이지










AK2347B 전자부품, 판매, 대치품
ASAHI KASEI
[AK2347B]
7. Absolute Maximum Ratings
Parameter Sy
mbol
Power Supply Voltage
VDD
Ground Level
VSS
Input Voltage
Input Current
(Except power supply pin)
VIN
IIN
Storage Temperature
Tstg
Note) All voltages are relative to the VSS pin.
Min.
-0.3
0
-0.3
-10
-55
Max.
4.6
0
VDD+0.3
+10
130
Units
V
V
V
mA
°C
Caution) If the device is used in conditions exceeding these values, the device may be
destroyed. Normal operations are not guaranteed in such extreme conditions.
8. Recommended Operating Conditions
Parameter Symbol
Condition
Operating Temperature Ta
Power Supply Voltage VDD
Analog Reference Voltage AGND
Note) All voltages are relative to the VSS pin.
Min. Typ.
40
2.7 3.0
1/2VDD
Max.
85
3.3
Units
°C
V
V
9. Digital DC Characteristics
Parameter Symbol
High level input voltage
Low level input voltage
VIH1
VIH2
VIL1
VIL2
High level input current
IIH
Low level input current
IIL
High level output voltage VOH
Low level output voltage
VOL
Condition
SDATA
SCLK, CSN
SDATA
SCLK, CSN
VIH=VDD
SDATA, SCLK, CSN
VIL=0V
SDATA, SCLK, CSN
IOH=+0.2mA
SDATA
IOL=0.4mA
SDATA
Min.
0.7VDD
0.8VDD
Typ.
Max.
0.3VDD
0.2VDD
10
Units
V
V
μA
-10 μA
VDD0.4
VDD
V
0.0 0.4
V
MS1419-E-00
-7-
2 012/05

7페이지


구       성 총 30 페이지수
다운로드[ AK2347B.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
AK2347

AUDIO LSI

Asahi Kasei Microsystems
Asahi Kasei Microsystems
AK2347A

Two-way Radio Audio & Sub-Audio Processor

Asahi Kasei Microsystems
Asahi Kasei Microsystems

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵