The TAS5518C is an 8-channel digital pulse-width modulator (PWM) that provides both advanced performance and a high level of system integration. The TAS5518C is designed to interface seamlessly with most audio digital signal processors. The TAS5518C automatically adjusts control configurations in response to clock and data rate changes and idle conditions. This enables the TAS5518C to provide an easy-to-use control interface with relaxed timing requirements.
The TAS5518C can drive eight channels of H-bridge power stages. Texas Instruments power stage parts TAS5111, TAS5112, or TAS5182 with FETs are designed to work seamlessly with the TAS5518C. The TAS5518C supports either the single-ended or bridge-tied-load configuration. The TAS5518C also provides a high-performance, differential output to drive an external, differential-input, analog headphone amplifier (such as the TPA112).
The TAS5518C uses AD modulation operating at a 384-kHz switching rate for 48-, 96-, and
192-kHz data. The 8× oversampling combined with the fifth-order noise shaper provides a broad, flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.
The TAS5518C is a clocked slave-only device. The TAS5518C receives MCLK, SCLK, and LRCLK from other system components. The TAS5518C accepts master clock rates of 128, 192, 256, 384, 512, and 768 fS. The TAS5518C accepts a 64-fS bit clock.
The TAS5518C allows for extending the dynamic range by providing a power-supply, volume-control (PSVC) output signal.
General Features
Automated Operation With an Easy-to-Use
Control Interface
I2C Serial-Control Slave Interface
Integrated AM Interference-Avoidance Circuitry
Single, 3.3-V Power Supply
64-Pin TQFP Package
5-V Tolerant Inputs
Audio Input/Output
Automatic Master-Clock-Rate and
Data-Sample-Rate Detection
Eight Serial Audio Input Channels
Eight PWM Audio Output Channels Configurable as
Six Channels With Stereo Lineout or Eight Channels
Line Output Is a PWM Output to Drive an External
Differential-Input Operational Amplifier
Headphone PWM Output to Drive an External Differential
Amplifier Like the TPA112
PWM Outputs Support Single-Ended and Bridge-Tied Loads
32-, 38-, 44.1-, 48-, 88.2-, 96-, 176.4-, and
192-kHz Sampling Rates
Data Formats: 16-, 20-, or 24-Bit Left-Justified, I2S,
or Right-Justified Input Data
64-fS Bit-clock rate
128-, 192-, 256-, 384-, 512-, and 768-fS
Master Clock Rates (Up to a Maximum of 50 MHz)
Audio Processing
48-Bit Processing Architecture With 76 Bits of
Precision for Most Audio-Processing Features
Volume Control Range 36 dB to 127 dB
Master Volume Control Range of 18 dB
to 100 dB
Eight Individual Channel Volume Control
Ranges of 18 dB to 127 dB
Programmable Soft Volume and Mute Update Rates
Four Bass and Treble Tone Controls With ≥18-dB Range,
Selectable Corner Frequencies, and Second-Order Slopes
L, R, and C
LS, RS
LR, RR
Sub
Configurable Loudness Compensation
Two Dynamic Range Compressors With Two Thresholds,
Two Offsets, and Three Slopes
Seven Biquads Per Channel
Full 8×8 Input Crossbar Mixer. Each Signal-Processing
Channel Input Can be Any Ratio of the Eight Input channels.
8×2 Output Mixer, Channels 16. Each Output is a Mix
of Any Two Signal-Processed Channels. It is Recommended to
Use the Pass-Through Output Mixer Configuration.
8×3 Output Mixer, Channels 7 and 8. Each Output Is a Mix of
Any Three Signal-Processed Channels. It Is Recommended to Use
the Pass-Through Output Mixer Configuration.
Three Coefficient Sets Stored on the Device Can Be Selected
Manually or Automatically (Based on Specific Data Rates).
DC Blocking Filters
Able to Support a Variety of Bass Management Algorithms
PWM Processing
32-Bit Processing PWM Architecture With 40 Bits of Precision
8× Oversampling With Fifth-Order Noise Shaping at
32 kHz-48 kHz, 4× Oversampling at 88.2 kHz and 96 kHz,
and 2× Oversampling at 176.4 kHz and 192 kHz
>110-dB Dynamic Range
THD+N < 0.1%
20-Hz20-kHz, Flat Noise Floor for 44.1-, 48-, 88.2-, 96-,
176.4-, and 192-kHz Data Rates
Digital De-Emphasis for 32-, 44.1-, and 48-kHz Data Rates
Flexible Automute Logic With Programmable Threshold and Duration
for Noise-Free Operation
Intelligent AM Interference-Avoidance System Provides
Clear AM Reception
Power-Supply Volume Control (PSVC) Support for Enhanced
