PCM1680

Manufacturer Part NumberPCM1680
DescriptionThe PCM1680 is a CMOS, monolithic integrated circuit which features eight 24-bit audio digital-to-analog converters (DACs) and support circuitry in a small SSOP-28
ManufacturerTexas Instruments
PCM1680 datasheet
 


Specifications of PCM1680

# Dacs8# Inputs / # Outputs0 / 8
ArchitectureDelta-SigmaResolution(bits)24
Sampling Rate(max)(khz)192Control InterfaceSPI, I2C
Digital Audio InterfaceL,R,I2SThd+n(typ)(%)0.002
Dac Snr(typ)(db)105Power Consumption(typ)(mw)530
Operating Temperature Range(c)-25 to 70Analog Voltage Av/dd(min)(v)4.75
Analog Voltage Av/dd(max)(v)5.25Pin/package28SSOP/QSOP
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www.ti.com..................................................................................................................................................
24-Bit, 192-kHz Sampling, Enhanced Multilevel, Delta-Sigma, Audio
FEATURES
1
24-Bit Resolution
2345
Analog Performance:
– Dynamic Range: 105 dB Typical
– SNR: 105 dB Typical
– THD+N: 0.002% Typical
– Full-Scale Output: 3.9 V
PP
4x/8x Oversampling Interpolation Filter:
– Stop-Band Attenuation: –50 dB
– Passband Ripple: ±0.04 dB
Sampling Frequency: 5 kHz to 200 kHz
System Clock: 128 f
, 192 f
, 256 f
S
S
f
, 768 f
, or 1152 f
with Autodetect
S
S
S
Zero Flags for Selectable Channel
Combinations
2
Serial Port (SPI™/I
C™) for Mode Control
User-Programmable Functions:
– Flexible Audio Data Formats
2
– Right-Justified, I
S™, and Left-Justified
– 16-, 18-, 20-, and 24-Bit Audio Data
– Digital Attenuation: Mode Selectable
– 0 dB to –63 dB, 0.5-dB/step
– 0 dB to –100 dB, 1-dB/step
– Soft Mute
– Digital De-Emphasis
– Digital Filter Roll-Off: Sharp or Slow
Single Power-Supply Operation: 5-V Analog,
5-V Digital
Package: SSOP-28 (150 mil)
Pin-Compatible with
PCM1780
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.
System Two, Audio Precision are trademarks of Audio Precision, Inc.
2
SPI is a trademark of Motorola.
3
I2C, I2S 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.
Digital-to-Analog Converter
APPLICATIONS
Integrated A/V Receivers
DVD Movie and Audio Players
HDTV Receivers
Car Audio Systems
DVD Add-On Cards for High-End PCs
Digital Audio Workstations
Typical
Other Multichannel Audio Systems
DESCRIPTION
The PCM1680 is a CMOS, monolithic integrated
circuit
digital-to-analog converters (DACs) and support
, 384 f
, 512
S
S
circuitry in a small SSOP-28. The DACs use TI's
enhanced multilevel delta-sigma (ΔΣ) architecture to
achieve excellent signal-to-noise performance and a
high tolerance to clock jitter.
The PCM1680 accepts industry-standard audio data
formats with 16-bit to 24-bit audio data. Sampling
rates up to 200 kHz are supported. The PCM1680
provides a full set of user-programmable functions
through a serial control port, using an SPI or I
interface.
PCM1680
SLES133B – MARCH 2005 – REVISED OCTOBER 2008
which
features
eight
24-bit
Copyright © 2005–2008, Texas Instruments Incorporated
audio
2
C

PCM1680 Summary of contents

  • Page 1

    ... The PCM1680 accepts industry-standard audio data formats with 16-bit to 24-bit audio data. Sampling rates up to 200 kHz are supported. The PCM1680 provides a full set of user-programmable functions through a serial control port, using an SPI or I interface. ...

  • Page 2

    ... V DD –0 ±10 –40 to +110 –55 to +150 +150 +260 +260 = kHz, system clock = 512 TEST CONDITIONS Product Folder Link(s): PCM1680 www.ti.com UNIT 0.3, < 6 0.3, < 6 °C °C °C °C °C MIN NOM ...

  • Page 3

    ... 0.486 V at BPZ input OUT CC Full-scale (–0 dB) AC-coupled load ±0.04 dB Stop band = 0.546 f S Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 , and 24-bit data, unless otherwise noted. S MIN TYP MAX UNIT TTL-compatible 0.8 10 – ...

  • Page 4

    ... DATA1 7 22 BCK 8 21 LRCK DGND 10 19 DATA2 DATA3 12 17 DATA4 13 16 MSEL 14 15 Product Folder Link(s): PCM1680 www.ti.com , and 24-bit data, unless otherwise noted. S MIN TYP MAX UNIT 0.198 f 0.884 f ±0.5 dB –35 dB 20/f S ±0.1 dB –0.02 dB –0.07 4. ...

  • Page 5

    ... SLES133B – MARCH 2005 – REVISED OCTOBER 2008 TERMINAL FUNCTIONS DESCRIPTION (1) (1) 1 and V 2 OUT OUT (1) 3 and V 4 OUT OUT (1) 5 and V 6 OUT OUT (1) 7 and V 8 OUT OUT 2 (1) ( (1) (2) ( (1) (4) C Product Folder Link(s): PCM1680 PCM1680 ( ( Submit Documentation Feedback 5 ...

  • Page 6

    ... Oversampling Enhanced Digital Filter Multilevel With Delta-Sigma Function Modulator DAC Controller DAC DAC DAC Zero Detect Product Folder Link(s): PCM1680 www.ti.com V Output Amp and OUT Low-Pass Filter Output Amp and V OUT Low-Pass Filter V Output Amp and OUT Low-Pass Filter V Output Amp and ...

  • Page 7

    ... S G003 Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 , and 24-bit data, unless otherwise noted. S PASSBAND FREQUENCY RESPONSE (SHARP ROLL-OFF) 0.1 0.2 0.3 0.4 Frequency [ Figure 2. TRANSITION CHARACTERISTICS (SLOW ROLL-OFF) 0.1 0.2 0.3 ...

  • Page 8

    ... S S 0.4 0.3 0.2 0.1 0.0 −0.1 −0.2 −0.3 −0.4 −0 G007 Product Folder Link(s): PCM1680 www.ti.com , and 24-bit data, unless otherwise noted. S DE-EMPHASIS ERROR – Frequency – kHz Figure 6. DE-EMPHASIS ERROR – Frequency – kHz Figure 8. Copyright © ...

  • Page 9

    ... ANALOG FILTER PERFORMANCE 100 1k f − Frequency − kHz Figure 11. Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 DE-EMPHASIS ERROR – Frequency – kHz Figure 10. , and 24-bit data, unless otherwise noted ...

  • Page 10

    ... G012 110 108 106 104 102 100 98 96 5.25 4.75 G014 Product Folder Link(s): PCM1680 www.ti.com , and 24-bit data, unless otherwise noted S DYNAMIC RANGE vs SUPPLY VOLTAGE 5.00 V – Supply Voltage – Figure 13. CHANNEL SEPARATION vs SUPPLY VOLTAGE 5.00 V – Supply Voltage – Figure 15 ...

  • Page 11

    ... G016 110 108 106 104 102 100 −25 G018 Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 DYNAMIC RANGE vs TEMPERATURE − Free-Air Temperature − Figure 17. CHANNEL SEPARATION vs TEMPERATURE 0 25 ...

  • Page 12

    ... PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER SYSTEM CLOCK INPUT The PCM1680 requires a system clock for operating the digital interpolation filters and multilevel ΔΣ modulators. The system clock is applied at the SCK (pin 5) input. common audio sampling rates. Figure 20 shows the timing requirements for the system clock input. For optimal performance important to use a clock source with low phase jitter and noise. Texas Instruments’ ...

  • Page 13

    ... DATA1, DATA2, DATA3, and DATA4 into the audio interface serial shift register. Serial data are clocked into the PCM1680 on the rising edge of BCK. LRCK is the serial audio left/right word clock used to latch serial data into the serial audio interface internal registers. ...

  • Page 14

    ... Figure 22. Data formats are selected using the format bits, FMT[2:0], located in control register 9 of the PCM1680. The default data format is 24-bit left-justified. All formats require binary twos complement, MSB-first audio data. Figure 22 DATA1, DATA2, DATA3, and DATA4 each carry two audio channels, designated as the left and right channels. ...

  • Page 15

    ... N–1 LSB MSB 1/f S L-Channel N–2 N–1 LSB MSB Figure 22. Audio Data Input Formats Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 R-Channel LSB MSB LSB MSB ...

  • Page 16

    ... The PCM1680 has two zero-flag pins, ZERO1 (pin 1) and ZERO2 (pin 28), which are assigned to the combinations A through D as shown in combination bits, AZRO[1:0], located in control register 13 of the PCM1680. If the input data of the L-channel and/or R-channel of all assigned channels remain at a logic-0 level for 1024 sampling periods (LRCK clock periods), ZERO1 and ZERO2 are set to a logic-1 state, or high level ...

  • Page 17

    ... HIGH SPI CONTROL INTERFACE The SPI control interface of the PCM1680 is a 3-wire synchronous serial port that operates asynchronously to the serial audio interface. The SPI control interface is used to program the on-chip mode registers. The control interface includes MD (pin 4), MC (pin 3), and MS (pin 2 the serial data input, used to program the mode registers ...

  • Page 18

    ... The PCM1680 has seven bits for its own slave address. The first six bits (MSBs) of the slave address are factory preset to 1001 10. The next bit of the address byte is the device select bit, which can be user-defined using the ADR terminal. A maximum of two PCM1680s can be connected on the same bus at one time. Each PCM1680 responds when it receives its own slave address ...

  • Page 19

    ... St: Start Condition W: Write ACK: Acknowledge Sp: Stop Condition READ OPERATION A master can read any PCM1680 register using a single access. The master sends a PCM1680 slave address with a read bit after transferring the register address. Then the PCM1680 transfers the data in the register specified. Figure diagram of the read operation. Copyright © ...

  • Page 20

    ... ACK Reg Address ACK Sr Slave Address Figure 29. Read Operation Repeated Start t (D-HD (SCL-R) (RS-HD (HI) (RS- 0.1 C Figure 30. Interface Timing Product Folder Link(s): PCM1680 www.ti.com ACK Read Data NACK t (SDA- (SDA-R) (P-SU) MIN MAX 100 4.7 4.7 4 4.7 ...

  • Page 21

    ... MODE CONTROL REGISTERS USER-PROGRAMMABLE MODE CONTROLS The PCM1680 includes a number of user-programmable functions which are accessed via control registers. The registers are programmed using the serial control interface which is discussed in the data sheet. Table 5 lists the available mode control functions, along with the respective reset default conditions and associated register index ...

  • Page 22

    ... IDX4 IDX3 IDX2 IDX1 IDX0 AT87 (1) IDX4 IDX3 IDX2 IDX1 IDX0 RSV (1) IDX4 IDX3 IDX2 IDX1 IDX0 RSV Product Folder Link(s): PCM1680 www.ti.com AT16 AT15 AT14 AT13 AT12 AT11 AT26 AT25 AT24 AT23 AT22 AT21 AT36 AT35 ...

  • Page 23

    ... Mute 8, has a digital attenuation function. The attenuation level can be set from OUT – 255) DEC = 0 through 128 with DAMS = 0 or for ATx[7:0] DEC Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 AT15 AT14 AT13 ...

  • Page 24

    ... RSV RSV RSV x. Default value: 0 OUT B11 B10 RSV RSV RSV RSV x. Default value: 0 OUT ), equal to V /2. COM CC Product Folder Link(s): PCM1680 www.ti.com MUT6 MUT5 MUT4 MUT3 MUT2 MUT1 RSV RSV RSV RSV MUT8 MUT7 ...

  • Page 25

    ... Copyright © 2005–2008, Texas Instruments Incorporated B11 B10 RSV RSV B11 B10 ZREV Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 FLT RSV RSV FMT2 FMT1 FMT0 Typical ...

  • Page 26

    ... S , 768 1152 f and sampling clock frequency ≤ 24 kHz 384 f and sampling clock frequency ≤ 48 kHz S or 192 f and sampling clock frequency ≤ 96 kHz S Product Folder Link(s): PCM1680 www.ti.com RSV RSV RSV RSV RSV RSV Copyright © 2005–2008, Texas Instruments Incorporated ...

  • Page 27

    ... B11 B10 AZRO1 B11 B10 ZERO8 ZERO7 ZERO6 2 C Interface Only) Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 AZRO0 RSV RSV RSV RSV ZERO5 ZERO4 ZERO3 ZERO2 ...

  • Page 28

    ... V OUT The output amplifiers include an RC continuous-time filter, which helps to reduce the out-of-band noise energy present at the DAC outputs due to the noise-shaping characteristics of the PCM1680 ΔΣ DACs. The frequency response of this filter is shown in Figure to an acceptable level for most applications. An external low-pass filter is required to provide sufficient out-of-band noise rejection ...

  • Page 29

    ... AGND1 11 18 DATA3 DATA4 OUT MSEL OUT Figure 32. Basic Connection Diagram Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 Output Low-Pass Filter ...

  • Page 30

    ... SLES133B – MARCH 2005 – REVISED OCTOBER POWER SUPPLY AND GROUNDING The PCM1680 requires 5 V for the analog supply and digital supply. The 5-V supply is used to power not only the DAC analog and output filter circuitry, but also the digital filter and serial interface circuitry. For best performance, a 5-V supply using a linear regulator is recommended ...

  • Page 31

    ... Figure 34. Recommended PCB Layout Power Supplies +5V AGND + DGND PCM1680 AGND Analog Section Figure 35. Single-Supply PCB Layout Product Folder Link(s): PCM1680 PCM1680 SLES133B – MARCH 2005 – REVISED OCTOBER 2008 – Output Circuits Digital Ground Analog Ground B0031-02 – Output ...

  • Page 32

    ... Changes from Revision A (August 2006) to Revision B Changed 0. 0.486 V in the DC Accuracy section of the Electrical Characteristics table CC CC Corrected footnote 1 in Figure 26 ........................................................................................................................................ 18 32 Submit Documentation Feedback 2008.................................................................................................................................................. Revision History ................................................................................................ Product Folder Link(s): PCM1680 www.ti.com Page .................................... 3 Copyright © 2005–2008, Texas Instruments Incorporated ...

  • Page 33

    ... PCM1680DBQ ACTIVE PCM1680DBQG4 ACTIVE PCM1680DBQR ACTIVE PCM1680DBQRG4 ACTIVE (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 34

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing PCM1680DBQR SSOP/ DBQ QSOP PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 28 2000 330.0 16.4 6.5 Pack Materials-Page 1 20-Oct-2008 B0 (mm) K0 (mm Pin1 (mm) ...

  • Page 35

    ... Device Package Type PCM1680DBQR SSOP/QSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DBQ 28 2000 Pack Materials-Page 2 20-Oct-2008 Width (mm) Height (mm) 346.0 346.0 33.0 ...

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  • Page 38

    ... 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’ ...