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參數(shù)資料
| 型號： | TEA1098UH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Speech and handsfree IC |
| 中文描述： | TELEPHONE SPEECH CKT, UUC44 |
| 封裝： | DIE-44 |
| 文件頁數(shù)： | 2/40頁 |
| 文件大小： | 199K |
| 代理商： | TEA1098UH |
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1999 Oct 14
2
Philips Semiconductors
Product specification
Speech and handsfree IC
TEA1098
FEATURES
Line interface
Low DC line voltage
Voltage regulator with adjustable DC voltage
Symmetrical high impedance inputs (70 k
) for
dynamic, magnetic or electret microphones
DTMF input with confidence tone on earphone and/or
loudspeaker
Receive amplifier for dynamic, magnetic or
piezo-electric earpieces (with externally adjustable gain)
Automatic Gain Control (AGC) for true line loss
compensation.
Supplies
Provides a strong 3.35 V regulated supply for
microcontrollers or diallers
Provides filtered power supply, optimized according to
line current
Filtered 2.0 V power supply output for electret
microphone
PD logic input for power-down.
Handsfree
Asymmetrical high input impedance for electret
microphone
Loudspeaker amplifier with single-ended rail-to-rail
output and externally adjustable gain
Dynamic limiter on loudspeaker amplifier to prevent
distortion
Logarithmic volume control on loudspeaker amplifier via
linear potentiometer
Duplex controller consisting of:
– Signal and noise envelope monitors for both
channels (with adjustable sensitivities and timing)
– Decision logic (with adjustable switch-over and Idle
mode timing)
– Voice switch control (with adjustable switching range
and constant sum of gain during switching).
APPLICATIONS
Line powered telephone sets.
GENERAL DESCRIPTION
The TEA1098 is an analog bipolar circuit dedicated to
telephonyapplications. Itincludes aline interface, handset
(HS) microphone and earpiece amplifiers, handsfree (HF)
microphone and loudspeaker amplifiers and a duplex
controller with signal and noise monitors on both channels.
This IC provides a 3.35 V supply for a microcontroller or
dialler and a 2.0 V filtered voltage supply for an electret
microphone.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TEA1098TV
TEA1098H
VSO40
QFP44
plastic very small outline package; 40 leads
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10
×
10
×
1.75 mm
bare die; on foil
SOT158-1
SOT307-2
TEA1098UH
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