TDA1546T データシートの表示（PDF） - Philips Electronics

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TDA1546T

Bitstream Continuous Calibration DAC with digital sound processing (BCC-DAC)

Philips Electronics 

Philips Semiconductors

Bitstream Continuous Calibration DAC with

digital sound processing (BCC-DAC)

Preliminary specification

TDA1546T

1 FEATURES

1.1 Easy application

• Voltage output 1.5 V (RMS)

• Operational amplifiers and cascaded 4-stage digital FIR

filter integrated

• Master and slave mode clock system with selectable

system clock (fsys) 256fs or 384fs

• I2S-bus serial input format or Japanese 16, 18 or 20 bits

serial input mode

• All features are accessible under remote control

• Simple 3-line serial microcontroller command interface

• Power-on reset

• 28 lead small outline package.

1.2 High performance

• Superior signal-to-noise ratio

• Low total harmonic distortion

• Wide dynamic range

• No zero crossing distortion

• Continuous calibration digital-to-analog conversion

combined with noise shaping techniques

• Second-order noise shaper

• 128 times oversampling in normal-speed mode

• 64 times oversampling in double-speed mode.

1.3 Digital sound processing features

1.3.1 VOLUME CONTROL FEATURES

• Smoothed transitions before and after digital mute (soft

mute)

• Fade function: duration-programmable (6 ms to 22.4 s

at 44.1 kHz) digital volume control (attenuation as well

as gain): +6 dB to −90 dB in steps of 0.375 dB with

automatic soft mute

• Digital balance: 0 dB to −22.5 dB in steps of −1.5 dB

(maximum overall attenuation combined with volume

control: −90 dB)

1.3.2 SOUND PROCESSING FEATURES

• Digital de-emphasis filter for three sample rates (32 kHz,

44.1 kHz or 48 kHz)

• Digital treble: −10.5 dB to +12 dB at 20 kHz; 16 steps

spaced at 1.5 dB

• Digital bass: −9 dB to +13.5 dB at 20 Hz; 16 steps

spaced at 1.5 dB

• Distortion-free digital dynamic bass boost: 0 dB to

+37 dB at 10 Hz; 15 steps spaced at 2 dB

• Can be used for loudness or dynamic digital bass boost

• Double-speed mode (e.g. for high-speed dubbing)

• Pseudo double-speed mode (for power saving

application)

• Digital speaker system mode including digital crossover

filter.

1.3.3 SOUND MONITOR FEATURES

• Spectrum analyzer for seven different frequency ranges

• Digital silence detection. Level (−48 dB to ∞ dB, in steps

of 3 dB) and duration (200 ms to 3.2 s, in steps of

200 ms at 44.1 kHz) programmable. Output via versatile

pins.

• Peak level detection and readout to microcontroller

(dB linear, 0 dB to −90 dB in steps of 1.5 dB)

• Digital overload detection. Level-programmable (dB

linear, −1.5 dB to −46.5 dB, in steps of 3 dB). Output via

versatile pins.

• Digital spectrum analyzer by combination of peak

detection and 7-band selective filter

• Optional combination spectrum analyzer and overload

detection for frequency-dependent overload detection.

2 ORDERING INFORMATION

TYPE

NUMBER

TDA1546T

NAME

SO28

PACKAGE

DESCRIPTION

plastic small outline package; 28 leads; body width 7.5 mm

VERSION

SOT136-1

January 1995

4

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