PCM1794A 24-Bit, 192-kHz Sampling, Advanced ?? 8 Oversampling Digital Filter: converters (DACs) and support circuitry in a small 28-– Stop-Band Attenuation: –130 dB pin SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve

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  • DSP

    Data

    LRCK

    BCK PCM1794A

    L Analog Out

    R Analog OutMCLK

    I/V Stage

    I/V Stage

    Differential Output or Differential to SE

    Stage

    Product

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    Sample &Buy

    Technical

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    PCM1794ASLES117B AUGUST 2004REVISED DECEMBER 2015

    PCM1794A 24-Bit, 192-kHz Sampling, Advanced Segment, Audio StereoDigital-to-Analog Converter

    1 Features 2 Applications1 24-Bit Resolution A/V Receivers Analog Performance: DVD Players

    Musical Instruments Dynamic Range: Car Audio Systems 132 dB (9 V RMS, Mono) Other Applications Requiring 24-Bit Audio 129 dB (4.5 V RMS, Stereo)

    127 dB (2 V RMS, Stereo)3 Description THD+N: 0.0004%The PCM1794A device is a monolithic, CMOS- Differential Current Output: 7.8 mA p-p integrated circuit that includes stereo digital-to-analog

    8 Oversampling Digital Filter: converters (DACs) and support circuitry in a small 28-pin SSOP package. The data converters use TIs Stop-Band Attenuation: 130 dBadvanced segment DAC architecture to achieve Pass-Band Ripple: 0.00001 dB excellent dynamic performance and improved

    Sampling Frequency: 10 kHz to 200 kHz tolerance to clock jitter. The PCM1794A deviceprovides balanced current outputs, allowing the user System Clock: 128, 192, 256, 384, 512, or 768 fSto optimize analog performance externally. SamplingWith Autodetectrates up to 200 kHz are supported. Accepts 16-Bit and 24-Bit Audio Data

    PCM Data Formats: Standard, I2S, and Left- Device Information(1)Justified PART NUMBER PACKAGE BODY SIZE (NOM)

    Optional Interface Available to External Digital PCM1794A SSOP (28) 10.20 mm 5.30 mmFilter or DSP

    (1) For all available packages, see the orderable addendum at Digital De-Emphasis the end of the data sheet. 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

    Simplified Application Diagram

    1

    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.

    http://www.ti.com/product/PCM1794A?dcmp=dsproject&hqs=pfhttp://www.ti.com/product/PCM1794A?dcmp=dsproject&hqs=sandbuysamplebuyhttp://www.ti.com/product/PCM1794A?dcmp=dsproject&hqs=tddoctype2http://www.ti.com/product/PCM1794A?dcmp=dsproject&hqs=swdesKithttp://www.ti.com/product/PCM1794A?dcmp=dsproject&hqs=supportcommunityhttp://www.ti.com/product/pcm1794a?qgpn=pcm1794a

  • PCM1794ASLES117B AUGUST 2004REVISED DECEMBER 2015 www.ti.com

    Table of Contents7.3 Feature Description................................................. 131 Features .................................................................. 17.4 Device Functional Modes........................................ 182 Applications ........................................................... 1

    8 Application and Implementation ........................ 193 Description ............................................................. 18.1 Application Information............................................ 194 Revision History..................................................... 28.2 Typical Application ................................................. 255 Pin Configuration and Functions ......................... 3

    9 Power Supply Recommendations ...................... 266 Specifications......................................................... 410 Layout................................................................... 266.1 Absolute Maximum Ratings ...................................... 4

    10.1 Layout Guidelines ................................................. 266.2 ESD Ratings.............................................................. 410.2 Layout Example .................................................... 276.3 Recommended Operating Conditions....................... 5

    11 Device and Documentation Support ................. 286.4 Thermal Information .................................................. 511.1 Documentation Support ........................................ 286.5 Electrical Characteristics........................................... 511.2 Community Resources.......................................... 286.6 Timing Requirements ................................................ 711.3 Trademarks ........................................................... 286.7 Typical Characteristics .............................................. 911.4 Electrostatic Discharge Caution............................ 287 Detailed Description ............................................ 1211.5 Glossary ................................................................ 287.1 Overview ................................................................. 12

    12 Mechanical, Packaging, and Orderable7.2 Functional Block Diagram ....................................... 12Information ........................................................... 28

    4 Revision HistoryNOTE: Page numbers for previous revisions may differ from page numbers in the current version.

    Changes from Revision A (November 2006) to Revision B Page

    Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementationsection, Power Supply Recommendations section, Layout section, Device and Documentation Support section, andMechanical, Packaging, and Orderable Information section. ................................................................................................ 1

    2 Submit Documentation Feedback Copyright 20042015, Texas Instruments Incorporated

    Product Folder Links: PCM1794A

    http://www.ti.com/product/pcm1794a?qgpn=pcm1794ahttp://www.ti.comhttp://www.go-dsp.com/forms/techdoc/doc_feedback.htm?litnum=SLES117B&partnum=PCM1794Ahttp://www.ti.com/product/pcm1794a?qgpn=pcm1794a

  • 1MONO 28 VCC2L

    2CHSL 27 AGND3L

    3DEM 26 IOUTL

    4LRCK 25 IOUTL+

    5DATA 24 AGND2

    6BCK 23 VCC1

    7SCK 22 VCOML

    8DGND 21 VCOMR

    9VDD 20 IREF

    10MUTE 19 AGND1

    11FMT0 18 IOUTR

    12FMT1 17 IOUTR+

    13ZERO 16 AGND3R

    14RST 15 VCC2R

    PCM1794Awww.ti.com SLES117B AUGUST 2004REVISED DECEMBER 2015

    5 Pin Configuration and Functions

    DB Package28-Pin SSOP

    Top View

    Pin FunctionsPIN

    I/O DESCRIPTIONNO. NAME1 MONO I Monaural mode enable (1)

    2 CHSL I L-channel, R-channel select (1)

    3 DEM I De-emphasis enable (1)

    4 LRCK I Left and right clock (fS) input (1)

    5 DATA I Serial audio data input (1)

    6 BCK I Bit clock input (1)

    7 SCK I System clock input (1)

    8 DGND Digital ground9 VDD Digital power supply, 3.3 V10 MUTE I Mute control (1)

    11 FMT0 I Audio data format select (1)

    12 FMT1 I Audio data format select (1)

    13 ZERO O Zero flag14 RST I Reset (1)

    15 VCC2R Analog power supply (R-channel DAC), 5 V16 AGND3R Analog ground (R-channel DAC)17 IOUTR+ O R-channel analog current output +18 IOUTR O R-channel analog current output 19 AGND1 Analog ground (internal bias)20 IREF Output current reference bias pin21 VCOMR R-channel internal bias decoupling pin22 VCOML L-channel internal bias decoupling pin

    (1) Schmitt-trigger input, 5-V tolerant.

    Copyright 20042015, Texas Instruments Incorporated Submit Documentation Feedback 3

    Product Folder Links: PCM1794A

    http://www.ti.com/product/pcm1794a?qgpn=pcm1794ahttp://www.ti.comhttp://www.go-dsp.com/forms/techdoc/doc_feedback.htm?litnum=SLES117B&partnum=PCM1794Ahttp://www.ti.com/product/pcm1794a?qgpn=pcm1794a

  • PCM1794ASLES117B AUGUST 2004REVISED DECEMBER 2015 www.ti.com

    Pin Functions (continued)PIN

    I/O DESCRIPTIONNO. NAME23 VCC1 Analog power supply, 5 V24 AGND2 Analog ground (internal bias)25 IOUTL+ O L-channel analog current output +26 IOUTL O L-channel analog current output 27 AGND3L Analog ground (L-channel DAC)28 VCC2L Analog power supply (L-channel DAC), 5 V

    6 Specifications

    6.1 Absolute Maximum Ratingsover operating free-air temperature range (unless otherwise noted) (1)

    MIN MAX UNITVCC1, VCC2L, VCC2R 0.3 6.5Supply Voltage VVDD 0.3 4

    Supply voltage differences: VCC1, VCC2L, VCC2R 0.1 VGround voltage differences: AGND1, AGND2, AGND3L, AGND3R, DGND 0.1 V

    LRCK, DATA, BCK, SCK, FMT1,FMT0, MONO, CHSL, DEM, MUTE, 0.3 6.5

    Digital input voltage VRSTZERO 0.3 (VDD + 0.3 V) < 4

    Analog input voltage 0.3 (VCC + 0.3 V) < 6.5 VInput current (any pins except supplies) 10 mAAmbient temperature under bias 40 125 CJunction temperature 150 CLead temperature (soldering, 5 s) 260 CPackage temperature (IR reflow, peak) 250 CStorage temperature, Tstg 55 150 C

    (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratingsonly, which do not imply functional operation of the device at these or any other conditions beyond those indicated under RecommendedOperating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

    6.2 ESD RatingsVALUE UNIT

    Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) 2500V(ESD) Electrostatic discharge VCharged-device model (CDM), per JEDEC specification JESD22- 1500C101 (2)

    (1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

    4 Submit Documentation Feedback Copyright 20042015, Texas Instruments Incorporated

    Product Folder Links: PCM1794A

    http://www.ti.com/product/pcm1794a?qgpn=pcm1794ahttp:

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