TWL1103

语音频带音频处理器

The voice-band audio processor VBAP is designed to perform transmit encoding analog/digital A/D conversion, receive decoding digital/analog D/A conversion, and transmit and receive filtering for voice-band communications systems. The device operates in either the 15-bit linear or 8-bit companded u-law or A-Law mode, which is selectable through the I2C interface. The VBAP generates its own internal clocks from a 2.048-MHz master clock input.

This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These circuits have been qualified to protect this device against electrostatic discharges ESD of up to 2 kV according to MIL-STD-883C, Method 3015; however, it is advised that precautions be taken to avoid application of any voltage higher than maximum-rated voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriated logic voltage level, preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication _Guidelines for Handling Electrostatic-Discharge-Sensitive ESDS Devices and Assemblies_ available from Texas Instruments.

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2.7-V Operation

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Two Differential Microphone Inputs, One Differential Earphone Output, and One Single-Ended Earphone Output

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Programmable Gain Amplifiers for Transmit, Receive, Sidetone, and Volume Control

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Earphone Mute and Microphone Mute

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On-Chip I2C Bus, Which Provides a Simple, Standard, Two-Wire Serial Interface With Digital ICs

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Programmable for 15-Bit Linear Data or 8-Bit Companded u-Law or A-Law Data

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Available in a 32-Pin Thin Quad Flatpack TQFP Package and an 80-Pin GQE MicroStar JuniorTM Ball Grid Array BGA

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Designed for Analog and Digital Wireless Handsets and Telecommunications Applications

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Dual-Tone Multifrequency DTMF and Single Tone Generator

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Pulse Density Modulated PDM Buzzer Output

MicroStar Junior and VBAP are trademarks of Texas Instruments.

All other trademarks are the property of their respective owners.