參數(shù)資料
型號(hào)： 935263449112
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 無(wú)繩電話(huà)/電話(huà)
英文描述： SPEAKER PHONE CIRCUIT, PDSO40
封裝： PLASTIC, SOT-158, VSOP-40
文件頁(yè)數(shù)： 2/43頁(yè)
文件大?。?/td> 237K
代理商： 935263449112
1999 Oct 14
10
Philips Semiconductors
Product specication
Speech and handsfree IC
TEA1098
handbook, full pagewidth
1.0
IDD
(pA)
1.5
2.5
3.0
VDD (V)
2.0
108
107
106
105
104
103
102
10
FCA050
Fig.6 Current consumption on VDD.
POWER-DOWN MODE (PIN PD)
To reduce consumption during dialling or register recall
(flash), the TEA1098 is provided with a power-down input
(PD). When the voltage on pin PD is LOW, the current
consumption from VBB and VDD is reduced to typically
460
A. Therefore a capacitor of 470 F on VBB is
sufficient to power the TEA1098 during pulse dialling or
flash. The PD input has a pull-up structure. In this mode,
the capacitor CREG is internally disconnected.
Transmit channels (pins MIC+, MIC
, DTMF,
HFTX and LN)
HANDSET MICROPHONE AMPLIFIER (PINS MIC+, MIC
AND
LN)
The TEA1098 has symmetrical microphone inputs.
The input impedance between pins MIC+ and MIC
is
typically 70 k
. The voltage gain between pins MIC+/MIC
and LN is set to 44.3 dB. Without output limitation, the
microphone input stage can accept signals of up to
18 mV (RMS) at 2% THD (room temperature).
The microphone inputs are biased at a voltage of one
diode.
Automatic gain control is provided for line loss
compensation.
DTMF AMPLIFIER (PINS DTMF, LN AND RECO)
The TEA1098 has an asymmetrical DTMF input. The input
impedance between DTMF and GND is typically 20 k
.
The voltage gain between pins DTMF and LN is set to
25.35 dB. Without output limitation, the input stage can
accept signals of up to 180 mV (RMS) at 2% THD (room
temperature).
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
16.5 dB. This input is
DC biased at 0 V.
The automatic gain control has no effect on these
channels.
相關(guān)PDF資料
PDF描述
935263448557 SPEAKER PHONE CIRCUIT, PQFP44
935263448518 SPEAKER PHONE CIRCUIT, PQFP44
08-01-0106 Connector Contact,SKT,CRIMP Terminal
08-03-0101 Crimp Socket Contact; Wire Size (AWG):20-18; Contact Material:Phosphor Bronze; Contact Plating:Tin
08-05-0104 KK 156 Term Crp Edge Card 18 24Awg SGold
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