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參數(shù)資料
| 型號： | 935262584518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELEPHONE SPEECH CKT, PDSO16 |
| 封裝： | PLASTIC, SOT-109, SO-16 |
| 文件頁數(shù)： | 12/30頁 |
| 文件大小： | 178K |
| 代理商： | 935262584518 |
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2000 Feb 18
2
Philips Semiconductors
Product specication
Speech circuit with dialler interface, regulated
supply and earpiece volume control
TEA1111A
FEATURES
Low DC line voltage; operates down to 1.5 V (excluding
voltage drop across external polarity guard)
Line voltage regulator with adjustable DC voltage
3.25 V regulated strong supply point for peripheral
circuits compatible with:
– Speech mode
– Ringer mode
– Trickle mode.
Transmit stage with:
– Microphone amplifier with symmetrical high
impedance inputs
– DTMF amplifier with confidence tone on earpiece.
Receive stage with:
– Earpiece amplifier with adjustable gain and volume
control.
MUTE input for pulse or DTMF dialling
AGC line loss compensation for microphone and
earpiece
LED control output.
APPLICATIONS
Line powered telephone sets with LCD module
Cordless telephones
Fax machines
Answering machines.
GENERAL DESCRIPTION
The TEA1111A is a bipolar integrated circuit that performs
all speech and line interface functions required in fully
electronic telephone sets. It performs electronic switching
between speech and dialling. The IC operates at a line
voltage down to 1.5 V DC (with reduced performance) to
facilitate the use of telephone sets connected in parallel.
When the line current is high enough, a fixed amount of
current is derived from the LN pin in order to create a
strong supply point at pin VDD. The voltage at pin VDD is
regulated to 3.25 V to supply peripherals such as dialler,
LCD module and microcontroller.
QUICK REFERENCE DATA
Iline = 15 mA; VEE =0V; VVCI =0V; RSLPE =20 ; AGC pin connected to VEE; Zline = 600 ; f = 1 kHz; measured
according to test circuits given in Figs 15, 16 and 17; Tamb =25 °C; Tj =25 °C for TEA1111AUH; unless otherwise
specied.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Iline
line current operating range
normal operation
11
140
mA
with reduced
performance
1
11
mA
VLN
DC line voltage
3.7
4.0
4.3
V
ICC
internal current consumption
VCC = 3.3 V
1.15
1.4
mA
VCC
supply voltage for internal circuitry (unregulated)
IP =0mA
3.3
V
VDD
regulated supply voltage for peripherals
speech mode
IDD = 3 mA
2.95
3.25
3.55
V
ringer mode
IDD = 75 mA
3.0
3.3
3.6
V
IDD
available supply current for peripherals
3mA
Gv(TX)
typical voltage gain for microphone amplier
VMIC = 4 mV (RMS)
43.2
44.2
45.2
dB
Gv(QR)
typical voltage gain for earpiece amplier
VIR = 4 mV (RMS)
26.4
27.4
28.4
dB
G
v(QR)
volume control range for earpiece amplier
0
14.5
dB
G
v(trx)
gain control range for microphone and earpiece
ampliers with respect to Iline =15mA
Iline =85mA
6.0
dB
Gv(trx)(m) gain reduction for microphone and earpiece
ampliers
MUTE = LOW
80
dB
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