NXP Semiconductors TEA1098A
The TEA1098A is an analog bipolar circuit dedicated for telephony applications. It includes a line 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 strong supply for a microcontroller and a 2.0 V filtered voltage supply for an electret microphone.| Part No. | TEA1098A |
|---|---|
| Datasheet | TEA1098A Download |
| Manufacturer |  NXP Semiconductors |
| Description | Speech/handsfree |
| Buy | Stock & Price |
FEATURES
Line interface● Low DC line voltage
● Voltage regulator with adjustable DC voltage
● Symmetrical high impedance inputs (70 kΩ) for dynamic, magnetic or electret microphones
● DTMF input with confidence tone on earphone and/or loudspeaker
● Earphone amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain)
● Digital volume control on earphone amplifier (4 steps)
● Automatic Gain Control (AGC) for true line loss compensation
● Microphone mute
● Key tone mode. Supplies
● Provides a strong 3.35 V regulated supply for microcontroller or dialler
● 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
● Digital volume...
