PCM1794A-Q1 Digital-to-Analog Converter Datasheet

PCM1794A-Q1 Datasheet, PDF, Equivalent


Part Number

PCM1794A-Q1

Description

Audio Stereo Digital-to-Analog Converter

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download PCM1794A-Q1 Datasheet


PCM1794A-Q1
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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 fS
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.

PCM1794A-Q1
PCM1794A-Q1
SLES276A – NOVEMBER 2015 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ................................................ 7
6.7 Typical Characteristics .............................................. 9
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 18
8 Application and Implementation ........................ 19
8.1 Application Information............................................ 19
8.2 Typical Application ................................................. 25
9 Power Supply Recommendations...................... 26
10 Layout................................................................... 26
10.1 Layout Guidelines ................................................. 26
10.2 Layout Example .................................................... 27
11 Device and Documentation Support ................. 28
11.1 Documentation Support ........................................ 28
11.2 Community Resources.......................................... 28
11.3 Trademarks ........................................................... 28
11.4 Electrostatic Discharge Caution ............................ 28
11.5 Glossary ................................................................ 28
12 Mechanical, Packaging, and Orderable
Information ........................................................... 28
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (November 2015) to Revision A
Page
• Changed the device status from Product Preview to Production Data. ................................................................................. 1
2 Submit Documentation Feedback
Product Folder Links: PCM1794A-Q1
Copyright © 2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCM1794A-Q1 SLES276A – NOV EMBER 2015 – REVISED DECEMBER 2015 PC M1794A-Q1 24-Bit, 192-kHz Sampling, Adv anced Segment, Audio Stereo Digital-to- Analog Converter 1 Features •1 Quali fied for Automotive Applications • AE C-Q100 Qualified With the Following Res ults: – Device Temperature Grade 1: 40°C to +125°C Ambient Operating Te mperature Range – Device HBM Classifi cation Level 2 – Device CDM Classific ation 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 RM S, Stereo) – THD+N: 0.0004% • Diffe rential Current Output: 7.8 mA p-p • 8× Oversampling Digital Filter: – St op-Band Attenuation: –130 dB – Pass -Band Ripple: ±0.00001 dB • Sampling Frequency: 10 kHz to 200 kHz • Syste m Clock: 128, 192, 256, 384, 512, or 76 8 fS With Autodetect • Accepts 16-Bit and 24-Bit Audio Data • PCM Data Formats: Standard, I2S, and LeftJustifie.
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