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UTCL6726 の電気的特性と機能

UTCL6726のメーカーはUnisonic Technologiesです、この部品の機能は「UNIVERSAL SPEECH CIRCUIT」です。


製品の詳細 ( Datasheet PDF )

部品番号 UTCL6726
部品説明 UNIVERSAL SPEECH CIRCUIT
メーカ Unisonic Technologies
ロゴ Unisonic Technologies ロゴ 




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UTCL6726 Datasheet, UTCL6726 PDF,ピン配置, 機能
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UTCL6726 LINEAR INTEGRATED CIRCUIT
UNIVERSAL SPEECH CIRCUIT
DESCRIPTION
The UTC L6726 is a mask-programmable, monolithic
integrated speech circuits for using in electronic
telephones.
It is designed for using with a low impedance
microphone. Transmitting and receiving gain are
regulated with line length. Different regulation for various
current feeds can be set by external resistors. Typical
current feeds as 48V,2 · 200, 48V,2 · 400,and
36V,2·500, can be handled. Application dependent
parameters such as line balance, side tone level,
amplification and frequency response are set by external
components. Parameters are set independently which
means easy adaptation for various market needs.
The UTC L6726 is developed for using with
CMOS-type dialer ICs. A separate DTMF input is
switched when the circuit is muted, and an adjustable DC
supply is provided for feeding an external CMOS device.
FEATURES
*Minimum number of inexpensive external components,
5 capacitors and 11 resistors.
*Mute function for operation with DTMF-generator.
*Transmit and receive gain regulation for automatic loop
loss compensation.
*Extended current and voltage range 5~130mA,down to
2V.
*Differential microphone input for good balance to
ground.
*Balanced receiver output stage.
*Short start-up time.
*Stabilized DC-supply for low current CMOS dialers
and/or electret microphones.
*DTMF-input controlled by mute.
DIP-18
UTC
UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R108-015,A

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UTCL6726 pdf, ピン配列
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UTCL6726 LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Line voltage, tp=2s
Line current, continuous
VL
IL
Ambient Operating temperature
Ta
Storage temperature
Tstg
RATINGS
0~22
0~130
-40~+70
-55~+125
UNIT
V
mA
°C
°C
ELECTRICAL CHARACTERISTICS (Ta=25unless otherwise specified)
PARAMETER
FIG. TEST CONDITIONS
MIN
Line voltage
Transmitting gain, note 1
1
IL=15mA
IL=100mA
20·10 log(V2/V3), 1kHz
1
RL=0
RL=400
RL=900 ~2.2 k
3.3
11
41
43.5
46
Transmitting range of regulation
Transmitting frequency response
Receiving gain, note 1
1 1kHz, RL=0 ~ 900
1 200Hz ~ 3.4kHz
20·10 log (V4/V1), 1kHz
1
RL=0
RL=400
RL=900 ~2.2 k
3
-1
-18.5
-16
-13.5
Receiving range of regulation
1 1kHz, RL=0 ~ 900
3
Receiving frequency response
1 200Hz ~ 3.4kHz
-1
Microphone input impedance
pin12,13
1 1kHz, note 3
Transmitter input impedance pin 3 1 1kHz
Transmitter dynamic output
1
200Hz~3.4kHz
2% distortion, IL=20~100mA
Transmitter max output
1
200 Hz~3.4kHz
IL=0-100mA,V3=0.1V
Receiver output impedance
1 1kHz, note 3
Receiver dynamic output note 2
1
200Hz~3.4kHz
2% distortion, IL=20~100mA
Receiver max output
2
Measured with line rectifier
200 Hz~3.4kHz, IL=0~100mA, V1=0~50V
Transmitter output noise
Receiver output noise
1 Psof-weighting, Rel1 Vrms, RL=0
1
A-weighting, Rel 1Vrms, with cable
0~5km, φ=0.5mm,0~3km, φ=0.3mm
Mute input voltage at mute
(active low)
1
DC-supply voltage
1
IL=10~100mA, IDC=0mA
IL=10~100mA, IDC=2mA
DC-supply current, pin8
1
2
DC-output pin8 input leakage
current (no supply)
3 VDC=2.35V
DTMF transmitting gain
1 VM=0.3V
Notes:
1.Adjustable to both higher and lower values with external components.
2.The dynamic output can be doubled, see applications information.
24.5
TYP
3.7
13
MAX UNIT
4.1
15
V
43 45 dB
45.5 47.5 dB
48 50 dB
5 7 dB
1 dB
-16.5 -14.5
-14 -12
-11.5 -9.5
57
1
1.7(//2.7)
dB
dB
dB
dB
dB
k
17 k
1.5 Vp
3 Vp
3(+310)
0.5
Vp
0.9 Vp
-75 dBpsof
-85 dBA
0.3 V
2.35
2.2
V
mA
0.1 µA
26.5 28.5 dB
UTC UNISONIC TECHNOLOGIES CO., LTD. 3
QW-R108-015,A


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UTCL6726 電子部品, 半導体
www.DataSheet4U.com
UTCL6726 LINEAR INTEGRATED CIRCUIT
The circuit includes a temperature independent voltage reference used for regulation of the DC line voltage and for
the transmitting and receiving gain regulation. The DC voltage is very fast settled to its final value with a minimum of
overshoot.
The circuit uses a minimum of external components. In a normal practical case only 5 external capacitors of which
only one is an electrolytic/tantalum filter capacitor .The other capacitor are needed as radio interference suppression
capacitor over the line, one capacitor in the side-tone balancing network and one capacitor for low frequency cut-off
in each of the transmitting and receiving amplifiers. The frequency response is except for that, flat for both amplifiers.
The circuit will with external components get a very good return loss behavior both against purely resistive lines as
for instance 600 and against complex networks as 900 in parallel with 30nF.
To get a good CMRR the microphone input is balanced.
It is possible to add a push-button controlled cut-off of the transmitting amplifier to the circuit without any
disturbance of the other circuit functions
A mute input is included in the circuit. It gives:
1.Cut-off the microphone amplifier.
2.Reduced gain in the receiving amplifier.
3.Connection of the DTMF input.
The receiver amplifier is equipped with a high impedance input stage. This gives a less expensive RC-network on
the input.
Only resistive elements are used to set the receiving gain.
A push-pull power stage in the receiving amplifier gives a high output swing.
To get the extended low current and voltage range two resistors have to be connected from microphone input to
ground.
The side-tone balanced can be set by a RC-network without influence on other parameters. An inexpensive
solution requires only one capacitor while more capacitors can give better performance.
In fig.4①②③ and are RC-links with the following functions:
1.For radio interference suppression and to give the correct return loss behavior.
2.To set the gain and frequency response for transmitting.
3.To set the gain and frequency response for receiving.
4.To set the side-tone level
A stabilized DC output, with a pre-set output voltage of 2.35 Volts, is provided to facilitate interfacing to external
COMS dialer ICs. The voltage is adjustable with two resistors, as indicated in figure 5. The output requires some
filtering to avoid distortion on the telephone line. Note that a high current consumption of the external device will
alters the DC characteristics of the speech circuit.
+Line
1
-Line
AM 2
Mute
Transmitting
cut-off
AT
4
Figure 4. Block interconnections
3
AR
UTC
UNISONIC TECHNOLOGIES CO., LTD. 6
QW-R108-015,A

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部品番号部品説明メーカ
UTCL6726

UNIVERSAL SPEECH CIRCUIT

Unisonic Technologies
Unisonic Technologies


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