KA8504 [SAMSUNG]
SPEECH NETWORK WITH DIALER INTERFACE; 与拨号接口的话音网络
| 型号： | KA8504 |
| 厂家： | 
SAMSUNG |
| 描述： | SPEECH NETWORK WITH DIALER INTERFACE |
| 文件： | 总4页 (文件大小：55K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
KA8504
SPEECH NETWORK WITH DIALER INTERFACE
INTRODUCTION
16-DIP-300A
The KA8504 is a telephone speech network which includes TX Amp,
RX Amp and DTMF Amp.
The gain is controlled automatically by sensing the line current. The
circuit internally performs electronic switching between dialing and
speech by mute signal.
FEATURES
· Low line current operation
· Mute function
· DTMF signal interface
· Easy gain control
ORDERING INFORMATION
Device
KA8504
Package
Operating Temperature
16-DIP-300A
- 40°C ~ + 85°C
BLOCK DIAGRAM
ROF
14
13
RXI
RX GAIN
CONTROL
15
RX INPUT
AMP
RX OUTPUT
AMP
RXO
MF
GAIN
CONTROLLER
12
5
GC
10
11
MIC+
MIC-
TX GAIN
CONTROL
1
TX AMP
TX AMP
VL
2
3
6
9
CI
CO
MUTE
TOF
Fig. 1
KA8504
SPEECH NETWORK WITH DIALER INTERFACE
PIN CONFIGURATION
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VL
CI
Vcc
RXO
ROF
RXI
CO
BIAS
MF
GC
MUTE
VR
MIC-
MIC+
TOF
GND
Fig. 2
PIN DESCRIPTION
Pin No
Symbol
Description
1
2
VL
CI
Positive power line and TX Amp Output.
Current input.
Current output.
3
4
5
CO
BIAS
MF
If the line current is large, this pin dissipates excess power (current)
AC signal reference voltage terminal.
DTMF input.
When the mute pin is “H” level, this pin become active.
Mute input.
6
MUTE
When this pin is 'H’ level, speech circuit is muted and the DTMF input is enabled.
The voltage of this part becomes reference voltage of internal Amp.
Negative power line.
7
8
VR
GND
Output of the Mic Amp.
9
TOF
Negative feedback to MIC -.
10
11
12
13
14
15
16
MIC +
MIC -
GC
Non inverting Mic input.
Inverting Mic input.
Gain triggering point regulation.
Receiver input.
RXI
ROF
RXO
VCC
RX out and negative feedback to RX input.
Receiver Amp out.
Internal power supply pin. Power is supplied from VL through resistor.
KA8504
SPEECH NETWORK WITH DIALER INTERFACE
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Value
Unit
Line Voltage
VL
IL
15
150
V
mA
mA
W
Line Current
Surge Line Current (2 sec)
Power Dissipation
Operating Temperature
Storage Temperature
IL (SURGE)
PD
200
1.0
TOPR
TSTG
- 40 ~ 85
- 55 ~ 150
°C
°C
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, f = 1KHz, unless otherwise noted)
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
IL = 20mA
3.1
5.4
3.5
6.0
3.9
6.4
Line Voltage
VL
IL = 50mA
V
IL = 120mA
IL = 20mA
10.5
1.7
11.5
2.0
12.5
2.3
Internal Operating Voltage
TX Gain
VCC
IL = 50mA
3.3
3.7
4.1
V
IL = 120mA
IL = 20mA
7.2
7.6
8.0
35.0
32.0
37.0
34.0
39.0
36.0
dB
GV (TX)
IL = 120mA
IL = 20mA
-
-
2.5
4.0
THD = 4.0%
IL = 120mA
THD = 4.0%
IL = 20mA
VO (TX)
TX Dynamic Output Voltage
RX Gain
Vp-p
dB
-
-
-7.5
-4.5
-1.5
-1.5
-7.5
GV (RX)
IL = 120mA
IL = 20mA
-13.5
-
-
250
300
THD = 10%
IL = 120mA
THD = 10%
IL = 20 ~ 120mA
IL = 20mA
VO (RX)
RX Dynamic Output Voltage
mVp-p
-
-
RX Output Current
DTMF Gain
IO (RX)
4.0
20.5
17.5
24
-
22.5
19.5
-
-
mA
dB
24.5
21.5
-
GV (MF)
IL = 120mA
IL = 50mA
DTMF Input Impedance
Mute Pin High Voltage
ZI (MF)
KW
VIH (MUTE)
IL = 20 ~ 120mA
1.5
-
VCC
V
KA8504
SPEECH NETWORK WITH DIALER INTERFACE
APPLICATION CIRCUIT
Fig.3
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