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PDF TEA1099 Data sheet ( Hoja de datos )
| Número de pieza | TEA1099 | |
| Descripción | Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
DATA SHEET
TEA1099H
Speech and handsfree IC with
auxiliary inputs/outputs and analog
multiplexer
Product specification
Supersedes data of 1998 Jun 11
File under Integrated Circuits, IC03
1999 Apr 08
1 page  
Philips Semiconductors
Speech and handsfree IC with auxiliary
inputs/outputs and analog multiplexer
Product specification
TEA1099H
PINNING
SYMBOL PIN
DESCRIPTION
HFRX
1 receive input for loudspeaker
amplifier or auxiliary receive
amplifier
TNOI
2 transmit noise envelope timing
adjustment
TENV
3 transmit signal envelope timing
adjustment
TSEN
4 transmit signal envelope sensitivity
adjustment
RNOI
5 receive noise envelope timing
adjustment
RSEN
6 receive signal envelope sensitivity
adjustment
RENV
7 receive signal envelope timing
adjustment
DLC
8 dynamic limiter capacitor for the
loudspeaker amplifier
ESI 9 external supply input
VBB 10 stabilized supply for internal
circuitry
GALS
11 loudspeaker amplifier gain
adjustment
LSAO
12 loudspeaker amplifier output
GND
13 ground reference
SLPE
14 line current sense
LN 15 positive line terminal
REG
16 line voltage regulator decoupling
IR 17 receive amplifier input
AGC
18 automatic gain control/line loss
compensation
VDD 19 3.35 V regulated voltage supply for
the microcontroller
SYMBOL
MICS
STAB
SWR
VOL
SWT
IDT
TXOUT
GATX
TXIN
GNDTX
MIC−
MIC+
DTMF
QR
GARX
RECO
HFTX
HFC
PD
MUTT
MUTR
AUXC
RAUX
TXAUX
AUXO
PIN DESCRIPTION
20 microphone supply output
21 reference current adjustment
22 switching range adjustment
23 loudspeaker volume adjustment
24 switch-over timing adjustment
25 Idle mode timing adjustment
26 HF microphone amplifier output
27 HF microphone amplifier gain
adjustment
28 HF microphone amplifier input
29 ground reference for microphone
amplifiers
30 negative HS microphone amplifier
input
31 positive HS microphone amplifier
input
32 dual tone multi-frequency input
33 earpiece amplifier output
34 earpiece amplifier gain adjustment
35 receive amplifier output
36 transmit input for line amplifier or
auxiliary receive amplifier
37 logic input
38 power-down input (active LOW)
39 logic input (active LOW)
40 logic input (active LOW)
41 logic input
42 auxiliary receive amplifier input
43 auxiliary transmit amplifier input
44 auxiliary amplifier output
1999 Apr 08
5
5 Page 
Philips Semiconductors
Speech and handsfree IC with auxiliary
inputs/outputs and analog multiplexer
Product specification
TEA1099H
EARPIECE AMPLIFIER (PINS GARX AND QR)
The earpiece amplifier is an operational amplifier having
its output (QR) and its inverting input (GARX) available.
Its input signal comes, via a decoupling capacitor, from the
receive RECO output. It is used in combination with two
resistors to get the required gain or attenuation compared
to the receive gain. It can be chosen between
−3 and +15 dB.
Two external capacitors CGAR (connected between GARX
and QR) and CGARS (connected between GARX and
GND) ensure stability. The CGAR capacitor provides a
1st-order low-pass filter. The cut-off frequency
corresponds to the time constant CGAR × Re2.
The relationship CGARS ≥ 10 × CGAR must be fulfilled.
The earpiece amplifier has a rail-to-rail output QR, biased
at two diodes voltage. It is designed for use with low ohmic
(real) loads (150 Ω) or capacitive loads (100 nF in series
with 100 Ω).
AUXILIARY RECEIVE AMPLIFIER (PINS RAUX AND RECO)
The auxiliary receive amplifier has an asymmetrical input
RAUX; it uses the RECO output. Its input impedance
between pins RAUX and GND is typically equal to 20 kΩ.
The voltage gain between pins RAUX and RECO is equal
to −2.4 dB. Without any limitation from the output, the input
stage can accommodate signals up to 0.95 V (RMS) at
room temperature for 2% of THD.
This auxiliary amplifier has a rail-to-rail output RECO,
which is designed for use with high ohmic (real) loads
(larger than 5 kΩ). This output is biased at two diodes
voltage.
The automatic gain control has no effect on this channel.
Auxiliary amplifiers using AUXO (pins MIC+, MIC−,
HFTX, IR and AUXO)
The TEA1099H has an auxiliary output AUXO, biased at
two diodes voltage. This output stage is a rail-to-rail one,
designed for use with high ohmic (real) loads (larger than
5 kΩ). The AUXO output amplifier is used in three different
channels, two transmit channels and one receive channel.
AUXILIARY AMPLIFIERS USING THE MICROPHONE INPUTS
(PINS MIC+, MIC− AND AUXO)
The auxiliary transmit amplifier using the microphone
MIC+ and MIC− inputs has a gain of 25.5 dB referenced to
AUXO. Without limitation from the output, the input stage
can accommodate signals up to 16 mV (RMS) at room
temperature for 2% of THD.
The automatic gain control has no effect on this channel.
AUXILIARY AMPLIFIERS USING HFTX
(PINS HFTX AND AUXO)
The auxiliary transmit amplifier using the HFTX input has
a gain of 15.2 dB referenced to AUXO.
The automatic gain control has no effect on this channel.
RX AMPLIFIER USING IR (PINS IR AND AUXO)
The auxiliary receive amplifier uses pin IR as input.
The input is referred to LN and the DC biasing between
these two pins is one diode voltage. The voltage gain
between the input IR (referenced to LN) and the output
AUXO is typically equal to 32.8 dB, which compensates
typically the attenuation provided by the anti-sidetone
network.
Automatic gain control is provided for line loss
compensation.
AGC (pin AGC)
The TEA1099H performs automatic line loss
compensation, which fits well with the true line attenuation.
The automatic gain control varies the gain of some
transmit and receive amplifiers in accordance with the DC
line current. The control range is 6.45 dB for Gv(MIC-LN),
Gv(IR-RECO) and Gv(IR-AUXO) and 6.8 dB for the other
affected channels, which corresponds approximately to a
line length of 5.5 km for a 0.5 mm twisted-pair copper
cable.
To enable this gain control, the AGC pin must be shorted
to pin LN. The start current for compensation corresponds
to a line current equal to typically 23 mA and the stop
current to 57 mA. The start current can be increased by
connecting an external resistor between pins AGC and LN.
It can be increased up to 40 mA (using a resistor typically
equal to 80 kΩ). The start and stop current will be
maintained in a ratio equal to 2.5. By leaving the AGC pin
open-circuit, the gain control is disabled and no line loss
compensation is performed.
1999 Apr 08
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TEA1099.PDF ] | |
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