NXP Semiconductors TEA1097
The TEA1097 is an analog bipolar circuit dedicated for telephone applications. It includes a line interface, handset microphone and earpiece amplifiers, base microphone and loudspeaker amplifiers, some specific auxiliary Inputs/Outputs (I/Os) and an analog multiplexer to enable the right transmit and/or receive channels. The multiplexer is controlled by a logic circuitry decoding four logic inputs provided by a microcontroller.| Part No. | TEA1097 |
|---|---|
| Datasheet | TEA1097 Download |
| Manufacturer |  NXP Semiconductors |
| Description | Speech and loudspeaker amplifier |
| 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 electric microphones
● Dual Tone Multi-Frequency (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 microcontroller or dialler
● Provides filtered power supply, optimized according to line current and compatible with external voltage or current sources
● Filtered 2 V power supply output for electret microphone
● Compatible with a ringer mode
● Power-Down (PD) logic input for power-down. Loudspeaker amplifier
● Single-ended rail-to-rail output
● Externally adjustable gain
● Dynamic limiter to prevent distortion
● Logarithmic volume control via linear potentiometer. Auxiliary interfaces
● Asymmetrical high-impedance input for electret microphone.
