PCM1794A-Q1 Datasheet, PDF (1/34 Pages) Texas Instruments – Audio Stereo Digital-to-Analog Converter

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PCM1794A-Q1
SLES276A – NOVEMBER 2015 – REVISED DECEMBER 2015
PCM1794A-Q1 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo
Digital-to-Analog Converter
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM Classification Level 2
– Device CDM Classification Level C6
• 24-Bit Resolution
• Analog Performance:
– Dynamic Range:
– 132 dB (9 V RMS, Mono)
– 129 dB (4.5 V RMS, Stereo)
– 127 dB (2 V RMS, Stereo)
– THD+N: 0.0004%
• Differential Current Output: 7.8 mA p-p
• 8× Oversampling Digital Filter:
– Stop-Band Attenuation: –130 dB
– Pass-Band Ripple: ±0.00001 dB
• Sampling Frequency: 10 kHz to 200 kHz
• System Clock: 128, 192, 256, 384, 512, or 768 f_S
With Autodetect
• Accepts 16-Bit and 24-Bit Audio Data
• PCM Data Formats: Standard, I²S, and Left-
Justified
• Optional Interface Available to External Digital
Filter or DSP
• Digital De-Emphasis
• Digital Filter Rolloff: Sharp or Slow
• Soft Mute
• Zero Flag
• Dual-Supply Operation: 5-V Analog, 3.3-V Digital
• 5-V Tolerant Digital Inputs
• Small 28-Pin SSOP Package
2 Applications
• A/V Receivers
• Automotive Head Units
• Musical Instruments
• Car Audio Systems
• Other Applications Requiring 24-Bit Audio
3 Description
The PCM1794A-Q1 device is a monolithic, CMOS-
integrated circuit that includes stereo digital-to-analog
converters (DACs) and support circuitry in a small 28-
pin SSOP package. The data converters use TI’s
advanced segment DAC architecture to achieve
excellent dynamic performance and improved
tolerance to clock jitter. The PCM1794A-Q1 device
provides balanced current outputs, allowing the user
to optimize analog performance externally. Sampling
rates up to 200 kHz are supported.
PART NUMBER
PCM1794A-Q1
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
SSOP (28)
10.20 mm × 5.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application Diagram
DSP
1
Data
LRCK
BCK
MCLK
PCM1794A-Q1
I/V Stage
I/V Stage
Differential Output or
Differential to SE
Stage
L Analog Out
R Analog Out
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.