TEA1099H Overview
The TEA1099H is an analog bipolar circuit dedicated for telephone applications. It includes a line interface, handset (HS) microphone and earpiece amplifiers, handsfree (HF) 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 circuit which decodes four logic inputs...
TEA1099H Key Features
- Low DC line voltage
- Voltage regulator with adjustable DC voltage
- Symmetrical high impedance inputs (70 kΩ) for dynamic, magnetic or electret 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)
- AGC: Automatic Gain Control for true line loss pensation. Supplies
- Provides a strong 3.35 V regulated supply for microcontroller or dialler
- Provides filtered power supply, optimized according to line current and patible with external voltage or current sources
- Filtered 2.0 V power supply output for electret microphone
- patible with a ringer mode