參數(shù)資料
型號(hào)： TEA1069AH
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 無(wú)繩電話/電話
英文描述： Versatile speech/dialler/ringer with music-on-hold
中文描述： TELEPHONE MULTIFUNCTION CKT, PQFP44
封裝： PLASTIC, QFP-44
文件頁(yè)數(shù)： 10/44頁(yè)
文件大?。?/td> 301K
代理商： TEA1069AH
1998 Jan 08
10
Philips Semiconductors
Product specification
Versatile speech/dialler/ringer with
music-on-hold
TEA1069; TEA1069A
M
ICROPHONE INPUTS
MIC+
AND
MIC
AND GAIN PINS
GAS1
AND
GAS2
The circuit has symmetrical microphone inputs. Its input impedance is 64 k
(2
×
32 k
) and its voltage gain is typically
52 dB (when R7 = 68 k
). Dynamic, magnetic, piezoelectric or electret (with built-in FET source followers) microphones
can be used. Microphone arrangements are illustrated in Fig.7.
Fig.7 Alternative microphone arrangements.
Pin numbers in parenthesis refer to the TEA1069H and TEA1069AH.
(1) Resistor may be connected to reduce the terminating impedance.
a. Magnetic or dynamic
microphone.
b. Electret microphone.
c. Piezoelectric microphone.
handbook, full pagewidth
MBH198
VEE
VCC
(1)
3 (41)
36 (32)
3 (41)
4 (42)
23 (18)
4 (42)
3 (41)
4 (42)
MIC
+
MIC
MIC
MIC
+
MIC
+
MIC
The gain of the microphone amplifier can be adjusted
between 44 dB and 52 dB to suit the sensitivity of the
transducer in use. The gain is proportional to the value of
R7 which is connected between GAS1 and GAS2. Stability
is ensured by two external capacitors, C6 connected
between GAS1 and SLPE and C17 connected between
GAS1 and V
EE
. The value of C6 is 100 pF but this may be
increased to obtain a first-order low-pass filter. The value
of C17 is 10 times the value of C6. The cut-off frequency
corresponds to the time constant R7
×
C6.
R
ECEIVING AMPLIFIER
IR, QR
AND
GAR
The receiving amplifier has one input (IR) and one output
(QR). Earpiece arrangements are illustrated in Fig.8.
The IR to QR gain is typically 31 dB (when R4 = 100 k
).
It can be adjusted between 20 and 31 dB to match the
sensitivity of the transducer in use.
The gain is set with the value of R4 which is connected
between GAR and QR. The overall receive gain, between
LN and QR, is calculated by subtracting the anti-sidetone
network attenuation (32 dB) from the amplifier gain.
Two external capacitors, C4 and C7, ensure stability. C4 is
normally 100 pF and C7 is 10 times the value of C4.
The value of C4 may be increased to obtain a first-order
low-pass filter. The cut-off frequency will depend on the
time constant R4
×
C4.
The output voltage of the receiving amplifier is specified for
continuous-wave drive. The maximum output voltage will
be higher under speech conditions where the peak to RMS
ratio is higher.
相關(guān)PDF資料
PDF描述
TEA1069H Versatile speech/dialler/ringer with music-on-hold
TEA1069N Versatile speech/dialler/ringer with music-on-hold
TEA1081 Supply circuit with power-down for telephone set peripherals
TEA1081T Supply circuit with power-down for telephone set peripherals
TEA1083 Call progress monitor for line powered telephone sets
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA1069H 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Versatile speech/dialler/ringer with music-on-hold
TEA1069N 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Versatile speech/dialler/ringer with music-on-hold
TEA1081 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Supply circuit with power-down for telephone set peripherals
TEA1081T 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Supply circuit with power-down for telephone set peripherals
TEA1083 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Call progress monitor for line powered telephone sets
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