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부품번호 TEA1064A 기능
기능 Low voltage versatile telephone transmission circuit with dialler interface and transmit level dynamic limiting
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TEA1064A 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
DATA SHEET
TEA1064A
Low voltage versatile telephone
transmission circuit with dialler
interface and transmit level
dynamic limiting
Product specification
File under Integrated Circuits, IC03A
March 1994




TEA1064A pdf, 반도체, 판매, 대치품
Philips Semiconductors
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
Product specification
TEA1064A
QUICK REFERENCE DATA
PARAMETER
CONDITIONS
Operating ambient temperature
range
Line current operating range:
normal operation
with reduced performance
Internal supply current:
power-down input LOW
power-down input HIGH
Voltage gain range:
VCC1 = 2.8 V
VCC1 = 2.8 V
microphone amplifier
receiving amplifier
Line loss compensation:
gain control range
exchange supply voltage
range
exchange feeding bridge
resistance range
Maximum output voltage swing
on LN (peak-to-peak value)
R15 + R16 = 448
lline = 15 mA
Ip = 2 mA
Ip = 4 mA
Regulated line voltage application
R15 = 0 ;
R16 = 392
Supply for peripherals
DC line voltage
lline = 15 mA
Ip = 1.4 mA
Ip = 2.7 mA;
RREG-SLPE = 20 k
lline = 15 mA
without RREG-SLPE
RREG-SLPE = 20 k
SYMBOL
MIN.
TYP. MAX. UNIT
Tamb
lline
lline
ICC1
ICC1
Gv
Gv
Gv
Vexch
Rexch
25 − + 75 °C
11 140(1) mA
2 11 mA
1.3 1.6 mA
60 82 µA
44 52 dB
20 45 dB
5.7 6.1 6.5 dB
36 60 V
400 1000
VLN(p-p)
VLN(p-p)
3.7
3.95 4.2
V
3.0
3.25 3.5
V
Vp 2.5 − − V
Vp 2.9 − − V
VLN
3.57
V
VLN
4.57
V
March 1994
4

4페이지










TEA1064A 전자부품, 판매, 대치품
Philips Semiconductors
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
Product specification
TEA1064A
handbooIkp, h5alfpage
(mA)
4
MGR059
3
2
1
0
2 3 4 Vp (V)
lline = 15 mA; R16 = 392 ; R15 = 0 ; valid for MUTE = 0 and 1.
Line current has very little influence
Fig.4 Minimum supply current for peripherals (Ip)
as a function of the peripheral supply
voltage (Vp).
The maximum AC output swing on the line at low line
currents is influenced by R16 (limited by current) and the
maximum output swing on the line at high line currents is
influenced by the DC voltage VLN-SLPE (limited by voltage).
In both these situations, the internal dynamic limiter in the
sending channel prevents distortion when the microphone
input is overdriven. The maximum AC output swing on LN
is shown in Fig.5; practical values for R16 are from 200 to
600 and this influences both the maximum output swing
at low line currents and the supply capabilities.
The SLPE pin is the ground reference for peripheral
circuits, therefore inputs MUTE, PD and DTMF are also
referenced to SLPE.
Active microphones can be supplied between VCC1 and
VEE. Low-power circuits that provide only MUTE and/or PD
inputs to the TEA1064A also can be powered from VCC1.
However VCC1 cannot be used for circuits that provide
DTMF signals to the TEA1064A because VCC1 is referred
to ground.
If the line current lline exceeds ICC1 + 0.25 mA, the voltage
converter shunts the excess current to SLPE via LN;
where ICC1 1.3 mA, the value required by the IC for
normal operation.
The DC line voltage on LN is:
VLN = VLN-SLPE + (ISLPE × R9)
VLN = Vref + ([Iline ICC1 0.25 × 103 A] × R9)
in which
Vref = 3.3 V ± 0.25 V is the internal reference voltage
between VCC2 and SLPE; its value can be adjusted by
external resistor RVA
R9 = external resistor between SLPE and VEE (20 in
basic application).
With R9 = 20 , this results in:
VLN = 3.57 ± 0.25 V at lline = 15 mA
VLN = 4.17 ± 0.3 V at lline = 15 mA,
RVA(REG-SLPE) = 33 k
VLN = 4.57 ± 0.35 V at lline = 15 mA,
RVA(REG-SLPE) = 20 k
The preferred value for R9 is 20 . Changing R9
influences microphone gain, DTMF gain, the gain control
characteristics, sidetone, and the DC characteristics
(especially the low voltage characteristics).
In normal conditions, ISLPE >> (ICC1 + 0.25 mA) and the
static behaviour is equivalent to a voltage regulator diode
with an internal resistance of R9. In the audio frequency
range the dynamic impedance is determined mainly by R1.
The equivalent impedance of the circuit in the audio
frequency range is shown in Fig.6.
The internal reference voltage VCC2-SLPE can be increased
by external resistor RVA(REG-SLPE) connected between
REG and SLPE. The supply voltage VCC2-SLPE is shown as
a function of RVA(REG-SLPE) in Fig.7. Changing the
reference voltage influences the output swing of both
sending and receiving amplifiers.
At line currents below 8 mA (typ.), the DC voltage dropped
across the circuit is adjusted to a lower level automatically
(approximately 1.8 V at 2 mA). This gives the possibility of
operating more telephone sets in parallel with DC line
voltages (excluding polarity guard) down to an absolute
minimum of 1.8 V. At line currents below 8 mA (typ.), the
circuit has limited sending and receiving levels.
March 1994
7

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