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PDF TEA1097TV Data sheet ( Hoja de datos )
| Número de pieza | TEA1097TV | |
| Descripción | Speech and loudspeaker amplifier IC with auxiliary inputs/outputs and analog multiplexer | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
DATA SHEET
TEA1097
Speech and loudspeaker amplifier
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 loudspeaker amplifier IC with
auxiliary inputs/outputs and analog multiplexer
Product specification
TEA1097
PINNING
SYMBOL
MUTT
MUTR
AUXC
RAUX
TXAUX
AUXO
HFRX
n.c.
DLC
ESI
VBB
GALS
LSAO
GND
SLPE
LN
REG
IR
AGC
VDD
MICS
STAB
VOL
TXOUT
GATX
TXIN
GNDTX
MIC−
MIC+
DTMF
QR
GARX
RECO
HFTX
HFC
PD
PIN
VSO40
QFP44
1
2
3
4
5
6
7
8 to 10,
15 and 26
11
12
13
14
16
17
18
19
20
21
22
23
24
25
27
28
29
30
31
32
33
34
35
36
37
38
39
40
39
40
41
42
43
44
1
2 to 7, 22,
24 and 25
8
9
10
11
12
13
14
15
16
17
18
19
20
21
23
26
27
28
29
30
31
32
33
34
35
36
37
38
DESCRIPTION
logic input (active LOW)
logic input (active LOW)
logic input
auxiliary receive amplifier input
auxiliary transmit amplifier input
auxiliary amplifier output
receive input for loudspeaker amplifier
not connected
dynamic limiter capacitor for the loudspeaker amplifier
external supply input
stabilized supply for internal circuitry
loudspeaker amplifier gain adjustment
loudspeaker amplifier output
ground reference
line current sense
positive line terminal
line voltage regulator decoupling
receive amplifier input
automatic gain control/line loss compensation
3.35 V regulated voltage supply for microcontroller
microphone supply output
reference current adjustment
loudspeaker volume adjustment
base microphone amplifier output
base microphone amplifier gain adjustment
base microphone amplifier input
ground reference for microphone amplifiers
negative handset microphone amplifier input
positive handset microphone amplifier input
dual tone multi-frequency input
earpiece amplifier output
earpiece amplifier gain adjustment
receive amplifier output
transmit input for auxiliary receive amplifier
logic input
power-down input (active LOW)
1999 Apr 08
5
5 Page 
Philips Semiconductors
Speech and loudspeaker amplifier IC with
auxiliary inputs/outputs and analog multiplexer
Product specification
TEA1097
RINGER MODE (PINS ESI, VBB, AUXC AND PD)
The TEA1097 is designed to be activated during the
ringing phase. The loudspeaker amplifier can be used for
the melody signal. The IC must be powered by an external
supply on pin ESI, while applying a HIGH level on the logic
input AUXC and a LOW level on the PD input. Only the
HFRX input and the LSAO output are activated, in order to
limit the current consumption. Some dynamic limiting is
provided to prevent VBB from being discharged below
2.7 V.
Transmit channels (pins MIC+, MIC−, DTMF, TXAUX
and LN)
HANDSET MICROPHONE AMPLIFIER (PINS MIC+, MIC− AND
LN)
The TEA1097 has symmetrical microphone inputs.
The input impedance between MIC+ and MIC− is 70 kΩ
(typ.). The voltage gain between pins MIC+, MIC− and LN
is set to 44.3 dB. Without limitation from the output, the
microphone input stage can accommodate signals up to
18 mV (RMS) at room temperature for 2% of THD.
The microphone inputs are biased at one diode voltage.
Automatic gain control is provided for line loss
compensation.
DTMF AMPLIFIER (PINS DTMF, LN AND RECO)
The TEA1097 has an asymmetrical DTMF input. The input
impedance between pin DTMF and GND is 20 kΩ (typ.).
The voltage gain between pins DTMF and LN is set to
25.35 dB. Without limitation from the output, the input
stage can accommodate signals up to 180 mV (RMS) at
room temperature for 2% of THD.
When the DTMF amplifier is enabled, dialling tones may
be sent on the line. These tones can be heard in the
earpiece or in the loudspeaker at a low level. This is called
the confidence tone. The voltage attenuation between pins
DTMF and RECO is typically equal to −16.5 dB.
The DC biasing of this input is 0 V.
The automatic gain control has no effect on these
channels.
AUXILIARY TRANSMIT AMPLIFIER (PINS TXAUX AND LN)
The TEA1097 has an asymmetrical auxiliary input TXAUX.
The input impedance between pins TXAUX and GND is
20 kΩ (typ.). The voltage gain between pins TXAUX and
LN is set to 12.5 dB. Without limitation from the output, the
input stage can accommodate signals up to 1.2 V (RMS)
at room temperature for 2% of THD. The TXAUX input is
biased at two diodes voltage.
Automatic gain control is provided for line loss
compensation.
MICROPHONE MONITORING ON TXOUT (PINS MIC+, MIC−
AND TXOUT)
The voltage gain between the microphone inputs MIC+,
MIC− and the output TXOUT is set to 49.8 dB. This
channel gives an image of the signal sent on the line while
speaking in the handset microphone. Using external
circuitry, this signal can be used for several purposes such
as sending dynamic limiting or anti-howling in a listening-in
application. The TXOUT output is biased at two diodes
voltage.
The automatic gain control has no effect on these
channels.
Receive channels (pins IR, RAUX, RECO, GARX and
QR)
RX AMPLIFIER (PINS IR AND RECO)
The receive amplifier has one input IR which is referred to
the line. The input impedance between pins IR and LN is
20 kΩ (typ.) and the DC biasing between these pins is
equal to one diode voltage. The gain between pins IR
(referenced to LN) and RECO is typically equal to 29.7 dB.
Without limitation from the output, the input stage can
accommodate signals up to 50 mV (RMS) at room
temperature for 2% of THD.
This receive 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.
Automatic gain control is provided for line loss
compensation.
1999 Apr 08
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TEA1097TV.PDF ] | |
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