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TDA1549T 데이터시트(Datasheet) 2 Page - NXP Semiconductors

부품명 TDA1549T
상세내용  Stereo 4fs data input up-sampling filter with bitstream continuous calibration DAC BCC-DAC1
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제조사  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
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 2 page
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August 1994
2
Philips Semiconductors
Objective specification
Stereo 4fs data input up-sampling filter with
bitstream continuous calibration DAC (BCC-DAC1)
TDA1549T
FEATURES
• Easy application
• Finite-duration impulse-response (FIR) filtering and
noise shaping incorporated
• 2nd-order noise shaper
• Wide dynamic range (true 18-bit resolution)
• Low total harmonic distortion
• No zero-crossing distortion
• Superior signal-to-noise ratio
• Bitstream continuous calibration conversion concept
• Inherently monotonic
• Voltage output (1.5 V RMS) at line drive level
• Single supply rail (3.8 to 5.5 V)
• Optimum output voltage level over the entire supply
range
• Small outline packaging (SO16)
• Wide operating temperature range (−30 to +85 °C)
• Standard Japanese input format
• No analog post-filtering required
• Low power consumption
• Integrated operational amplifiers.
GENERAL DESCRIPTION
The TDA1549T (BCC-DAC1) is the first of a new
generation of digital-to-analog converters featuring a
unique combination of bitstream and continuous
calibration concepts.
A system of digital filtering, high oversampling, 2nd order
noise shaping and continuous calibration digital-to-analog
conversion ensures that only simple 1st order analog
filtering is required. The circuit accepts 18-bit four times
oversampled input data (4fs) in standard Japanese format.
Internal FIR filters remove the main spectral components
and increase the sampling rate to 96 times (96fs). A 2nd
order noise shaper converts this oversampled data to a
5-bit data stream. For low signal levels the converter
operates in the 1-bit bitstream mode with attendant high
differential linearity. Higher level signals are reproduced
using the dynamic continuous calibration technique,
thereby guaranteeing high linearity independent of
process variations, temperature effects and product
ageing.
High-precision, low-noise amplifiers convert the
digital-to-analog current to an output voltage capable of
driving a line output. Externally connected capacitors
perform the required 1st order filtering so that no further
post-filtering is required.
Internal reference circuitry ensures that the output voltage
is proportional to the supply voltage, thereby making
optimum use of the supply voltage over a wide range
(3.8 to 5.5 V). This unique configuration of bitstream and
continuous calibration techniques, together with a high
degree of analog and digital integration, results in a
digital-to-analog conversion system with true 18-bit
dynamic range, high linearity and simple low-cost
application.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA1549T
SO16
plastic small outline package; 16 leads; body width 7.5 mm
SOT162
−1




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