The PCM1789 is a high-performance, single-chip, 24-bit, stereo, audio digital-to-analog converter (DAC) with differential outputs

PCM1789

Manufacturer Part NumberPCM1789
DescriptionThe PCM1789 is a high-performance, single-chip, 24-bit, stereo, audio digital-to-analog converter (DAC) with differential outputs
ManufacturerTexas Instruments
PCM1789 datasheet
 


Specifications of PCM1789

# Dacs2# Inputs / # Outputs0 / 2
ArchitectureCurrent Segment DACResolution(bits)24
Sampling Rate(max)(khz)192Control InterfaceSPI,I2C,H/W
Digital Audio InterfaceL,R,I2S,DSPThd+n(typ)(%)0.002
Dac Snr(typ)(db)113Power Consumption(typ)(mw)154
Additional FeaturesAnalog Analog Mute,SPI Chip AddressOperating Temperature Range(c)-40 to 85
Analog Voltage Av/dd(min)(v)4.5Analog Voltage Av/dd(max)(v)5.5
Io Supply(min)(v)3Io Supply(max)(v)3.6
Pin/package24TSSOP  
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Burr-Brown Audio
www.ti.com..............................................................................................................................................
24-Bit, 192-kHz Sampling, Enhanced Multi-Level ΔΣ,
Stereo, Audio Digital-to-Analog Converter
FEATURES
1
Enhanced Multi-Level Delta-Sigma DAC:
2345
– High Performance: Differential, f
– THD+N: –94 dB
– SNR: 113 dB
– Dynamic Range: 113 dB
– Sampling Rate: 8 kHz to 192 kHz
– System Clock: 128 f
, 192 f
S
512 f
, 768 f
, 1152 f
S
S
S
– Differential Voltage Output: 8 V
– Analog Low-Pass Filter Included
– 4x/8x Oversampling Digital Filter:
– Passband Ripple: ±0.0018 dB
– Stop Band Attenuation: –75 dB
– Zero Flags (16-/20-/24-Bits)
Flexible Audio Interface:
2
– I/F Format: I
S™, Left-/Right-Justified, DSP
– Data Length: 16, 20, 24, 32 Bits
Flexible Mode Control:
2
– 3-Wire SPI™, 2-Wire I
C™-Compatible
Serial Control Interface, or
Hardware Control
– Connect Up To 4 Devices on One SPI Bus
2
Multi Functions via SPI or I
C I/F:
– Audio I/F Format Select: I
Right-Justified, DSP
– Digital Attenuation and Soft Mute
– Digital De-Emphasis: 32 kHz, 44.1 kHz,
48 kHz
– Data Polarity Control
– Power-Save Mode
Multi Functions via Hardware Control:
– Audio I/F Format Select: I
– Digital De-Emphasis Filter: 44.1 kHz
Analog Mute by Clock Halt Detection
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Blu-ray Disc is a trademark of Blu-ray Disc Association.
2
SPI is a trademark of Motorola, Inc.
3
I2S, I2C are trademarks of NXP Semiconductors.
4
All other trademarks are the property of their respective owners.
5
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
External Reset Pin
Power Supplies:
= 48 kHz
– 5 V for Analog and 3.3 V for Digital
S
Package: TSSOP-24
Operating Temperature Range:
– –40°C to +85°C
APPLICATIONS
, 256 f
, 384 f
,
S
S
S
Blu-ray Disc™ Players
DVD Players
PP
AV Receivers
Home Theaters
Car Audio External Amplifiers
Car Audio AVN Applications
DESCRIPTION
The PCM1789 is a high-performance, single-chip,
24-bit, stereo, audio digital-to-analog converter (DAC)
with differential outputs. The two-channel, 24-bit DAC
employs an enhanced multi-level, delta-sigma (ΔΣ)
modulator, and supports 8 kHz to 192 kHz sampling
rates and a 16-/20-/24-/32-bit width digital audio input
word on the audio interface. The audio interface of
PCM1789 supports a 24-bit, DSP format in addition
2
to I
S, left-justified, and right-justified formats.
The PCM1789 can be controlled through a three-wire,
SPI-compatible or two-wire, I
2
S, Left-Justified,
interface in software, which provides access to all
functions including digital attenuation, soft mute,
de-emphasis, and so forth. Also, hardware control
mode provides two user-programmable functions
through two control pins. The PCM1789 is available
in a 24-pin TSSOP package.
2
S, Left-Justified
PCM1789
SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009
2
C-compatible serial
Copyright © 2008–2009, Texas Instruments Incorporated

PCM1789 Summary of contents

  • Page 1

    ... S, Left-Justified, interface in software, which provides access to all functions including digital attenuation, soft mute, de-emphasis, and so forth. Also, hardware control mode provides two user-programmable functions through two control pins. The PCM1789 is available in a 24-pin TSSOP package Left-Justified PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 ...

  • Page 2

    ... Digital input clock frequency System clock frequency, SCKI Analog output voltage Differential To ac-coupled GND Analog output load resistance To dc-coupled GND Analog output load capacitance Digital output load capacitance Operating free-air temperature PCM1789 consumer grade 2 Submit Documentation Feedback 2009.............................................................................................................................................. (1) ORDERING INFORMATION SPECIFIED TEMPERATURE PACKAGE RANGE MARKING – ...

  • Page 3

    ... I = – OUT (5) ( OUT Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 , 24-bit data, and Sampling S PCM1789 MIN TYP MAX UNIT LJ, RJ, DSP 16, 20, 24, 32 Bits MSB first, twos complement 8 48 192 kHz 2 ...

  • Page 4

    ... Audio Precision System II, Average mode with 20-kHz LPF and 400-Hz HPF. (dual 192 kHz : SCKI = 128 Figure 38 Product Folder Link(s): PCM1789 www.ti.com , 24-bit data, and Sampling S PCM1789 MIN TYP MAX UNIT 16 24 Bits ±2.0 ±6 FSR ± ...

  • Page 5

    ... DD S (1) Full power-down kHz 192 kHz S (1) Full power-down PCM1789 consumer grade TSSOP-24 JA Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 , 24-bit data, and Sampling S PCM1789 MIN TYP MAX UNIT 0.328 × f ...

  • Page 6

    ... Clock for SPI, clock for I Chip Select for SPI, address select 0 for I Yes Yes hardware control mode Address select 5 for SPI, address select 1 for I No Yes hardware control mode Product Folder Link(s): PCM1789 www.ti.com - DESCRIPTION (1) with active low (1) ...

  • Page 7

    ... Interpolation Audio Interface Filter Digital Attenuation Digital Mute De-Emphasis Clock Manager Control Interface 2 (SPI/I C/Hardware) Common Voltage Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 VOUTL+ DAC (Left Ch) VOUTL- VOUTR+ DAC (Right Ch) VOUTR- VCOM VCOM VCC1 ...

  • Page 8

    ... FREQUENCY RESPONSE PASSBAND 0.010 Sharp 0.008 Slow 0.006 0.004 0.002 0 0.002 - 0.004 - 0.006 - 0.008 - 0.010 - 1.5 2 Product Folder Link(s): PCM1789 www.ti.com , 24-bit data, and Sampling S (Single Rate) Sharp Slow 0.1 0.2 0.3 0.4 Normalized Frequency ( Figure 2. (Dual Rate) Sharp Slow 0.1 0.2 0.3 0.4 Normalized Frequency ( Figure 4. ...

  • Page 9

    ... Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 , 24-bit data, and Sampling S DE-EMPHASIS CHARACTERISTIC (f = 44.1 kHz Frequency (kHz) Figure 8. ANALOG FILTER CHARACTERISTIC 1M 10k 100k Frequency (Hz) Figure 10 ...

  • Page 10

    ... DYNAMIC RANGE AND SIGNAL-TO-NOISE RATIO 118 116 114 112 110 108 106 5.25 5.50 4.50 Product Folder Link(s): PCM1789 www.ti.com , 24-bit data, and Sampling S vs TEMPERATURE Dynamic Range SNR - Temperature ( C) ° Figure 12. vs SUPPLY VOLTAGE Dynamic Range SNR 4 ...

  • Page 11

    ... OUTPUT SPECTRUM (BPZ 32768 Frequency (kHz) Figure 17. Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 , 24-bit data, and Sampling S OUTPUT SPECTRUM (–60 dB 32768 Frequency (kHz) Figure 16. 20 Submit Documentation Feedback 20 11 ...

  • Page 12

    ... The output amplifiers include an RC continuous-time filter that helps to reduce the out-of-band noise energy present at the DAC outputs as a result of the noise shaping characteristics of the PCM1789 delta-sigma (ΔΣ) DACs. The frequency response of this filter is shown in the Analog Filter Characteristic Characteristics ...

  • Page 13

    ... SYSTEM CLOCK INPUT The PCM1789 requires an external system clock input applied at the SCKI input for DAC operation. The system clock operates at an integer multiple of the sampling frequency include 128 f , 192 f , 256 f , 384 shown in Table 1. Figure 18 and Table 2 Table 1 ...

  • Page 14

    ... SBAS451A – OCTOBER 2008 – REVISED JANUARY SAMPLING MODE The PCM1789 supports three sampling modes (single rate, dual rate, and quad rate) in DAC operation. In single rate mode, the DAC operates at an oversampling frequency of x128 (except when SCKI = 128 f this mode is supported for sampling frequencies less than 50 kHz. In dual rate mode, the DAC operates at an oversampling frequency of x64 ...

  • Page 15

    ... At the same time, VOUT is immediately forced into the AGND1 level. To begin normal operation again, toggle RST high; the same power-up sequence is performed as the power-on reset shown in The PCM1789 does not require particular power-on sequences for VCC and VDD; it allows VDD on and then VCC on, or VCC on and then VDD on. From the viewpoint of the simultaneous power-on is recommended for avoiding unexpected responses on VOUTx ...

  • Page 16

    ... SBAS451A – OCTOBER 2008 – REVISED JANUARY AUDIO SERIAL PORT OPERATION The PCM1789 audio serial port consists of three signals: BCK, LRCK, and DIN. BCK is a bit clock input. LRCK is a left/right word clock or frame synchronization clock input. DIN is the audio data input for VOUTL/R. ...

  • Page 17

    ... LSB MSB 1/f (64 BCKs) S Left Channel Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 Right Channel LSB Right Channel LSB Right Channel ...

  • Page 18

    ... LRS t LRH t t DIS DIH Figure 27 MIN formats) 1/(2 × BCY Product Folder Link(s): PCM1789 www.ti.com 1 LRW 1 and DSP Data Formats TYP MAX UNIT 1/(2 × sec S t sec BCY Copyright © 2008–2009, Texas Instruments Incorporated ...

  • Page 19

    ... VOUTx± Figure 28. DAC Outputs During Loss of Synchronization ZERO FLAG The PCM1789 has two ZERO flag pins (ZERO1 and ZERO2) that can be assigned to the combinations shown in Table 6. Zero flag combinations are selected through the AZRO bit in control register 22 (16h). If the input data of all the assigned channels remain at '0' for 1024 sampling periods (LRCK clock periods), the ZERO1/2 bits are set to a high level, logic '1' state ...

  • Page 20

    ... SBAS451A – OCTOBER 2008 – REVISED JANUARY AMUTE CONTROL The PCM1789 has an AMUTE control input, status output pins, and functionality. AMUTEI is the input control pin of the internal analog mute circuit. An AMUTEI low input causes the DAC output to cut-off from the digital input and forces it to the center level (0 ...

  • Page 21

    ... ADR6 is determined by the status of the MODE pin. ADR5 is determined by the state of the ADR5/ADR1/RSV pin. A maximum of four PCM1789s can be connected on the same bus at any one time. Each PCM1789 responds when receiving its own register address. The eight least significant bits (LSBs), D[7:0] on MD, contain the data to be written to the register address specified by ADR[6:0] ...

  • Page 22

    ... The next two bits of the address byte are selectable bits that can be set by MS/ADR0/RSV and ADR5/ADR1/RSV. A maximum of four PCM1789s can be connected on the same bus at any one time. Each PCM1789 responds when it receives its own slave address. MSB ...

  • Page 23

    ... Figure 34. Framework for Write Operation READ OPERATION A master device can read the registers of the PCM1789. The value of the register address is stored in an indirect index register in advance. The master sends the PCM1789 slave address with a read bit after storing the register address. Then the PCM1789 transfers the data that the index register points to. ...

  • Page 24

    ... Figure 36. Repeated START t D-HD D- SCL-R S-HD t LOW t t S-SU HI Figure 36 STANDARD MODE MIN 4.7 4.7 4.0 4.7 4.0 250 0 4.0 0.2 × VDD 0.1 × VDD N/A Product Folder Link(s): PCM1789 www.ti.com STOP t t SDA-R P-SU t SDA-F FAST MODE MAX MIN MAX UNIT 100 400 kHz 1.3 s 1.3 s 0.6 s 0.6 s 0.6 s 100 ns 3450 0 900 ns 1000 ...

  • Page 25

    ... CONTROL REGISTER DEFINITIONS (SOFTWARE MODE ONLY) The PCM1789 has many user-programmable functions that are accessed via control registers, and are 2 programmed through the SPI or I along with reset default conditions and associated register addresses. Table 13. User-Programmable Mode Control Functions ...

  • Page 26

    ... This bit controls the system reset, which includes the resynchronization between the system clock and sampling clock, and DAC operation restart. The mode control register is not reset and the PCM1789 does not go into a power-down state. Returning the SRST bit to '1' is unnecessary automatically set to '1' after triggering a system reset. ...

  • Page 27

    ... B4 RSV RSV RSV RSV 2 S format format (default mode DSP format Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 , and quad rate for 128 f and 192 FMTDA2 FMTDA1 FMTDA0 Audio Data Interface Formats and Submit Documentation Feedback ...

  • Page 28

    ... Submit Documentation Feedback 2009.............................................................................................................................................. RSV RSV OPEDA RSV sections of this data sheet RSV RSV RSV RSV Product Folder Link(s): PCM1789 www.ti.com RSV RSV FLT RSV REVDA2 REVDA1 Copyright © 2008–2009, Texas Instruments Incorporated ...

  • Page 29

    ... Copyright © 2008–2009, Texas Instruments Incorporated SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 RSV RSV RSV RSV RSV RSV RSV RSV Product Folder Link(s): PCM1789 PCM1789 RSV MUTDA2 MUTDA1 RSV ZERO2 ZERO1 Submit Documentation Feedback 29 ...

  • Page 30

    ... ZREV Zero flag polarity selection 0 High for zero detect (default) 1 Low for zero detect 30 Submit Documentation Feedback 2009.............................................................................................................................................. RSV DEMP1 DEMP0 MZSEL Product Folder Link(s): PCM1789 www.ti.com RSV AZRO ZREV Copyright © 2008–2009, Texas Instruments Incorporated ...

  • Page 31

    ... Mute ... ... 0 Mute Product Folder Link(s): PCM1789 PCM1789 SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 RSV RSV RSV RSV ATDA12 ATDA11 ATDA10 ATDA22 ATDA21 ATDA20 time interval until the programmed S ...

  • Page 32

    ... ZERO2/AMUTEO pin is used as AMUTEO. POWER SUPPLY AND GROUNDING The PCM1789 requires +5 V for the analog supply and +3.3 V for the digital supply. The +5-V supply is used to power the DAC analog and output filter circuitry, and the +3.3-V supply is used to power the digital filter and serial interface circuitry ...

  • Page 33

    ... Because the overall system performance is defined by the quality of the DACs and the associated analog output circuitry, high-quality audio op amps are recommended for the active filters. Texas Instruments’ OPA2134, OPA2353, and NE5532A dual op amps are shown in with the PCM1789. VOUTx VOUTx- ...

  • Page 34

    ... The PCM1789 should be oriented with the digital I/O pins facing the ground plane split/cut to allow for short, direct connections to the digital audio interface and control signals originating from the digital section of the board ...

  • Page 35

    ... NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Original (October 2008) to Revision A Changed Figure 37 ............................................................................................................................................................. 32 Copyright © 2008–2009, Texas Instruments Incorporated SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 Revision History .................................................................................................... Product Folder Link(s): PCM1789 PCM1789 Page Submit Documentation Feedback 35 ...

  • Page 36

    ... TSSOP PCM1789PWG4 ACTIVE TSSOP PCM1789PWR ACTIVE TSSOP PCM1789PWRG4 ACTIVE TSSOP (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. ...

  • Page 37

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing PCM1789PWR TSSOP PW PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 24 2000 330.0 16.4 6.95 Pack Materials-Page 1 20-Jul-2010 Pin1 (mm) (mm) (mm) (mm) Quadrant 8.3 1.6 8.0 16.0 Q1 ...

  • Page 38

    ... Device Package Type PCM1789PWR TSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2000 Pack Materials-Page 2 20-Jul-2010 Width (mm) Height (mm) 346.0 346.0 33.0 ...

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  • Page 41

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...