AK2347B Datasheet, PDF (14/34 Pages) Asahi Kasei Microsystems – Two-way Radio Audio & Sub-Audio Processor

ASAHI KASEI
[AK2347B]
5) Sub-Audio filter Characteristics
Unless otherwise specified, the following apply: MCKSL=1, SA5=1, SA4=1, SA3=0, SA2=0, SA1=0,
SA0=1(fc=260.9Hz), VR5=0dB, 250.3Hz sinusoidal wave.
5.1) Analog characteristics
Parameter
Condition
Min.
Typ.
Max.
Units Remarks
Standard input level @ TSAOUT
-10
dBx
Transmit CTCSS
signal gain
Transmit CTCSS
signal distortion
DINO to TSAOUT
-2
DINO to TSAOUT
250.3Hz,Duty50%,
585mVp-p(@3V)rectangular wave
30kHz Low-pass filtering
0
+2
dB
-37
-32
dB
Standard input level @ RSAOUT
-10
dBx
Receive CTCSS
signal gain
Receive CTCSS
signal distortion
VR5 Attenuation error
RXINO to RSAOUT
RXINO to RSAOUT
RXINO=-10dBx input
30kHz Low-pass filtering
RXINO to RSAOUT
-6.0 to +6.0dB, 0.5dB/step
-2
0
+2
dB
-37
-32
dB
-0.5
+0.5
dB
5.2) Filter characteristics
Parameter
Condition
Min.
Typ.
Max.
Units Remarks
Overall characteristics
@fc=260.9Hz
DINO to TSAOUT
Relative value to
gain at 100Hz
50～240Hz -1.0
250Hz -1.5
300Hz
+1.0
+1.0
dB
-38
20
10
0
-10
-20
-30
-40
-50
-60
1.E+01
1.E+02
FREQUENCY(Hz)
1.E+03
Fig.5 Sub-Audio response characteristics
MS1419-E-00
- 14 -
2012/05