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TEA1069AH 数据表(PDF) 11 Page - NXP Semiconductors

部件名 TEA1069AH
功能描述  Versatile speech/dialler/ringer with music-on-hold
Download  44 Pages
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

TEA1069AH 数据表(HTML) 11 Page - NXP Semiconductors

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1998 Jan 08
11
Philips Semiconductors
Product specification
Versatile speech/dialler/ringer with
music-on-hold
TEA1069; TEA1069A
Fig.8 Alternative receiver arrangements.
Pin numbers in parenthesis refer to the TEA1069H and TEA1069AH.
(1) Resistor may be connected to prevent distortion (inductive load).
(2) Resistor is required to increase the phase margin (capacitive load).
a. Dynamic earpiece.
b. Magnetic earpiece.
c. Piezoelectric earpiece.
k, full pagewidth
(1)
(2)
QR
1 (39)
23 (18)
1 (39)
23 (18)
1 (39)
23 (18)
QR
QR
MBH199
VEE
VEE
VEE
DUAL TONE MULTI-FREQUENCY INPUT DTMF
When the DTMF input is enabled (MUTE is LOW) dialling
tones may be sent on to the line. The voltage gain from
DTMF to LN is typically 25.5 dB (when R7 = 68 k
Ω) and
varies with R7 in the same way as the microphone gain.
The tones can be heard in the earpiece at a low level
(confidence tone).
AUTOMATIC GAIN CONTROL INPUT AGC
Automatic line loss compensation is achieved by
connecting a resistor (R6) between AGC and VEE.
The automatic gain control varies the gain of the
microphone amplifier and the receiving amplifier in
accordance with the DC line current.
The control range is 5.8 dB which corresponds to a line
length of 5 km for a 0.5 mm diameter twisted-pair copper
cable with a DC resistance of 176
Ω/km and average
attenuation of 1.2 dB/km. Resistor R6 should be chosen in
accordance with the exchange supply voltage and its
feeding bridge resistance (see Fig.9 and Table 1).
The ratio of start and stop currents of the AGC curve is
independent of the value of R6. If no automatic line-loss
compensation is required the AGC pin may be left
open-circuit. The amplifiers, in this condition, will give their
maximum specified gain.


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