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부품번호 | TEA1098A 기능 |
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기능 | Speech and handsfree IC | ||
제조업체 | NXP Semiconductors | ||
로고 | |||
전체 30 페이지수
INTEGRATED CIRCUITS
DATA SHEET
TEA1098A
Speech and handsfree IC
Preliminary specification
File under Integrated Circuits, IC03
2000 Mar 21
Philips Semiconductors
Speech and handsfree IC
Preliminary specification
TEA1098A
BLOCK DIAGRAM
handbook, full pagewidth
LN 19 (15)
STARTER
REG SLPE
20 18
(16) (14)
LINE CURRENT DETECTION
LOW VOLTAGE BEHAVIOUR
AGC 22 (18)
AGC
GND 17 (13)
tail currents for preamps
HFTX 39 (36)
DTMF 35 (32)
MIC+ 34 (31)
MIC− 33 (30)
ATTENUATOR
R1
SWITCH
TEA1098A
TXI 31 (28)
TSEN 9 (4)
TENV 8 (3)
TNOI 7 (2)
RNOI 10 (5)
RENV 12 (7)
RSEN 11 (6)
TX AND RX
ENVELOPE AND NOISE
DETECTORS
BUFFERS
AND
COMPARATORS
DUCO LOGIC
SWT STATUS
GALS 15 (11)
LSAO 16 (12)
DLC 13 (8)
RECO 38 (35)
GARX 37 (34)
EARO 36 (33)
DYNAMIC
LIMITER
(10) 14 VBB
SUPPLY
MANAGEMENT
(19) 23 VDD
(20) 24 MICS
POWER-DOWN
CURRENT SOURCES
(38) 1 PD
LOGIC
INPUTS
DECODING
(37) 40 HFC
(39) 2 MUTE
(40) 3 BPC
VOICE
SWITCH
(27) 30 GATX
(26) 29 TXO
(29) 32 GNDTX
(24) 27 SWT
(25) 28 IDT
(21) 25 STAB
(22) 26 SWR
VOLUME
CONTROL
(41) 4 EVCI
(42) 5 LVCI
(1) 6 HFRX
ATTENUATOR
(17) 21 IR
2000 Mar 21
Fig.1 Block diagram.
4
FCA140
4페이지 Philips Semiconductors
Speech and handsfree IC
Preliminary specification
TEA1098A
handbook, full pagewidth
HFRX 1
TNOI 2
TENV 3
TSEN 4
RNOI 5
RSEN 6
RENV 7
DLC 8
n.c. 9
VBB 10
GALS 11
TEA1098AH
33 EARO
32 DTMF
31 MIC+
30 MIC−
29 GNDTX
28 TXI
27 GATX
26 TXO
25 IDT
24 SWT
23 n.c.
FCA142
Fig.3 Pin configuration (TEA1098AH).
FUNCTIONAL DESCRIPTION
All data given in this chapter are typical values, except
when otherwise specified.
Supplies
LINE INTERFACE AND INTERNAL SUPPLY (PINS LN, SLPE,
REG AND VBB)
The supply for the TEA1098A and its peripherals is
obtained from the line. The IC generates a stabilized
reference voltage (Vref) between pins SLPE and GND.
This reference voltage is equal to 3.7 V for line currents
lower than 18 mA. It than increases linearly with the line
current and reaches the value of 6.1 V for line currents
higher than 45 mA. For line currents below 9 mA, the
internal reference voltage generating Vref is automatically
adjusted to a lower value. This is the so-called low voltage
area and the TEA1098A has limited performances in this
area (see Section “Low voltage behaviour”). This
reference voltage is temperature compensated.
The voltage between pins SLPE and REG is used by the
internal regulator to generate the stabilized reference
voltage and is decoupled by means of a capacitor between
pins LN and REG.
This capacitor converted into an equivalent inductance
realizes the set impedance conversion from its DC value
(RSLPE) to its AC value (done by an external impedance).
The IC regulates the line voltage at pin LN and can be
calculated as follows:
VLN = Vref + RSLPE × ISLPE
ISLPE = Iline – Ix
where:
Iline = line current
Ix = current consumed on pin LN (approximately a few µA)
ISLPE = current flowing through the RSLPE resistor
The preferred value for RSLPE is 20 Ω. Changing this value
will affect more than the DC characteristics; it also
influences the transmit gains to the line, the gain control
characteristic, the sidetone level and the maximum output
swing on the line.
2000 Mar 21
7
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부품번호 | 상세설명 및 기능 | 제조사 |
TEA1098 | Speech and handsfree IC | NXP Semiconductors |
TEA1098A | Speech and handsfree IC | NXP Semiconductors |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |