DATA SHEET
Product specification
Supersedes data of 1995 May 18
File under Integrated Circuits, IC03
1996 Feb 09
INTEGRATED CIRCUITS
TEA1093
Hands-free IC
1996 Feb 09
2
Philips Semiconductors
Product specification
Hands-free IC
TEA1093
FEATURES
Line powered supply with:
adjustable stabilized supply voltage
power down function
Microphone channel with:
externally adjustable gain
microphone mute function
Loudspeaker channel with:
externally adjustable gain
dynamic limiter to prevent distortion
rail-to-rail output stages for single-ended or
bridge-tied load drive
logarithmic volume control via linear potentiometer
loudspeaker mute function
Duplex controller consisting of:
signal envelope and noise envelope monitors for both
channels with:
externally adjustable sensitivity
externally adjustable signal envelope time constant
externally adjustable noise envelope time constant
decision logic with:
externally adjustable switch-over timing
externally adjustable idle mode timing
externally adjustable dial tone detector in receive
channel
voice switch control with:
adjustable switching range
constant sum of gain during switching
constant sum of gain at different volume settings.
APPLICATIONS
Line-powered telephone sets with
hands-free/listening-in functions.
GENERAL DESCRIPTION
The TEA1093 is a bipolar circuit intended for use in
line-powered telephone sets. In conjunction with a
member of the TEA1060 family or PCA1070 transmission
circuits, the device offers a hands-free function for line
powered telephone sets. It incorporates a supply, a
microphone channel, a loudspeaker channel and a duplex
controller with signal and noise monitors on both channels.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TEA1093
DIP28
plastic dual in-line package; 28 leads (600 mil)
SOT117-1
TEA1093T
SO28
plastic small outline package; 28 leads; body width 7.5 mm
SOT136-1
1996 Feb 09
3
Philips Semiconductors
Product specification
Hands-free IC
TEA1093
QUICK REFERENCE DATA
V
SREF
= 4.2 V; V
GND
= 0 V; I
SUP
= 15 mA; V
SUP
= 0 V (RMS); f = 1 kHz; T
amb
= 25
C; PD = LOW; MUTET = LOW;
R
L
= 50
; R
VOL
= 0
; measured in test circuit of Fig.15; unless otherwise specified.
Note
1. Corresponds to 100 mW output power.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
I
SUP
operating supply current (pin SUP)
7
-
140
mA
V
BB
stabilized supply voltage
3.35
3.6
3.85
V
I
BB(pd)
current consumption from pin V
BB
in
power-down condition
PD = HIGH; V
BB
= 3.6 V
-
400
550
A
I
SUP(pd)
current consumption from pin SUP in
power-down condition
PD = HIGH; V
sup
= 4.5 V
-
55
75
A
G
vtx
voltage gain from pin MIC to pin MOUT in
transmit mode
V
MIC
= 1 mV (RMS);
R
GAT
= 30.1 k
12.5
15
17.5
dB
G
vtxr
voltage gain adjustment with R
GAT
-
10
-
+10
dB
G
vrx
voltage gain in receive mode
V
RIN
= 20 mV (RMS);
R
GAR
= 66.5 k
;
R
L
= 50
the difference between RIN1 and RIN2
to LSP1 or LSP2 single-ended load
15.5
18
20.5
dB
the difference between RIN1 and RIN2
to the difference between LSP1 and
LSP2 bridge-tied load
21.5
24
26.5
dB
G
vrxr
voltage gain adjustment with R
GAR
-
15
-
+15
dB
V
O(p-p)
bridge-tied load (peak-to-peak value)
V
RIN
= 150 mV (RMS);
R
L
= 33
; note 1
-
5.15
-
V
SWRA
switching range
-
40
-
dB
SWRA
switching range adjustment with R
SWR
referenced to R
SWR
= 365 k
-
40
-
+12
dB
T
amb
operating ambient temperature
-
25
-
+75
C
1996 Feb 09
4
Philips Semiconductors
Product specification
Hands-free IC
TEA1093
BLOCK DIAGRAM
Fig.1 Block diagram.
handbook, full pagewidth
BUFFER
BUFFER
BUFFER
BUFFER
LOG
LOG
LOGIC
VOICE
SWITCH
DYNAMIC
LIMITER
VOLUME
CONTROL
CMIC
RMIC
RTSEN
Vref
RGAT
RIDT
CSWT
RSTAB
RSWR
RVOL
CTSEN
CTENV
CTNOI
CRNOI
CRENV
CRSEN
CLSP1
CDLC
RRSEN
Vdt
RGAR
VBB
19
7
9
MUTET
MICROPHONE CHANNEL
SUPPLY
to TEA106X
DUPLEX CONTROLLER
TEA1093
22
28
27
26
23
24
25
5
6
1
4
MIC
TSEN
TENV
TNOI
RNOI
RENV
RSEN
GAR
2
LSP1
from voltage
stabilizer
LSP2
RIN2
VOL
11
3
12
13
14
16
18
20
21
15
17
10
8
GND
SWR
STAB
SWT
IDT
MICGND
MOUT
GAT
DLC/
MUTER
LOUDSPEAKER CHANNEL
13
mV
13 mV
ATTENUATOR
RIN1
2
from
TEA106X
from
TEA106X
V
I
I
V
-
1
V
I
I
V
MGD216
315 mV
TR1
SUP
to
TEA106X
to
TEA106X
SREF
PD
VA
VBB
CVBB
TR2
to dynamic
limiter
VOLTAGE
STABILIZER
POWER
DOWN
SWITCH
V
V
1996 Feb 09
5
Philips Semiconductors
Product specification
Hands-free IC
TEA1093
PINNING
SYMBOL
PIN
DESCRIPTION
DLC/MUTER
1
dynamic limiter timing adjustment,
receiver channel mute input
RIN1
2
receiver amplifier input 1
RIN2
3
receiver amplifier input 2
LSP2
4
loudspeaker amplifier output 2
GAR
5
receiver gain adjustment
LSP1
6
loudspeaker amplifier output 1
SREF
7
supply reference input
GND
8
ground reference
SUP
9
supply input
V
BB
10
stabilized supply output
VOL
11
receiver volume adjustment
SWR
12
switching range adjustment
STAB
13
reference current adjustment
SWT
14
switch-over timing adjustment
VA
15
V
BB
voltage adjustment
IDT
16
idle mode timing adjustment
PD
17
power-down input
MICGND
18
ground reference for the
microphone amplifier
MUTET
19
transmit channel mute input
MOUT
20
microphone amplifier output
GAT
21
microphone gain adjustment
MIC
22
microphone input
RNOI
23
receive noise envelope timing
adjustment
RENV
24
receive signal envelope timing
adjustment
RSEN
25
receive signal envelope sensitivity
adjustment
TNOI
26
transmit noise envelope timing
adjustment
TENV
27
transmit signal envelope timing
adjustment
TSEN
28
transmit signal envelope
sensitivity adjustment
Fig.2 Pin configuration.
handbook, halfpage
TEA1093
MGD217
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DLC/MUTER
RIN1
RIN2
LSP2
GAR
LSP1
SREF
GND
SUP
VBB
VOL
SWR
STAB
SWT
TSEN
TENV
TNOI
RSEN
RENV
RNOI
MIC
GAT
MOUT
MUTET
MICGND
PD
IDT
VA
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PDF 
ZIP