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1 Introduction

The TLC320AD545 single channel data/fax codec is a mixed signal broadband connectivity device. The

TLC320AD545 is comprised of a single channel codec and analog hybrid circuitry with a serial port for communication

with the host processor. The device also contains programmable gain control and one AT41 speaker driver. The

device operates with either a 5-V analog, a 5-V digital, and a 5-V monitor power supply or a 3.3-V analog, a 3.3-V

digital, and a 3.3-V monitor power supply or 5-V analog, 3.3-V digital, and a 5-V monitor power supply. The device

will be packaged in a single 48-pin PT (TQFP) package.

1.1

Features

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Analog, Digital, and Monitor Amp Power Supplies: 5 V or 3.3 V

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Differential and Single-Ended Driving of Analog Output

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Software Power-Down Mode

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Sample Rate Up to 11.025 kHz

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16-Bit Signal Processing in the Codec With 2s-Complement Data Format

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Typical 80-db Dynamic Range

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Total Signal-to-Noise + Distortion of 80 dB for the ADCs

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Total Signal-to-Noise + Distortion of 78 dB for the DACs

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Programmable Gain Amplifier

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600-

Ω Driver

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8-

Ω AT41 Differential Speaker Driver With Programmable Gain Amplifier

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Flash Write Enable Circuit Provide Power for Writing the Flash Memory Device

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Available in 48-Pin PT (TQFP) Package Operating From –40

_C to 85_C

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Transformer Reference ( 2.5 mA Source and Sink at 2.5 V for 5 V-Supply and 1.5 V for 3.3-V Supply) to allow

Single-Ended Driving