The PCM1681 and PCM1681-Q1 are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter (DAC) and support circuitry in small 28-lead TSSOP PowerPAD packages

PCM1681-Q1

Manufacturer Part NumberPCM1681-Q1
DescriptionThe PCM1681 and PCM1681-Q1 are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter (DAC) and support circuitry in small 28-lead TSSOP PowerPAD packages
ManufacturerTexas Instruments
PCM1681-Q1 datasheet
 


Specifications of PCM1681-Q1

# Dacs8# Inputs / # Outputs0 / 8
ArchitectureCurrent Segment DACResolution(bits)24
Sampling Rate(max)(khz)200Control InterfaceSPI,I2C,H/W
Digital Audio InterfaceL,R,I2S,TDM,DSPThd+n(typ)(%)0.002
Dac Snr(typ)(db)105Power Consumption(typ)(mw)386
Operating Temperature Range(c)-40 to 105Analog Voltage Av/dd(min)(v)4.5
Analog Voltage Av/dd(max)(v)5.5Pin/package28HTSSOP
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Burr-Brown Audio
www.ti.com....................................................................................................................................................
24-Bit, 192-kHz Sampling, Enhanced Multilevel Delta-Sigma,
Eight-Channel Audio Digital-to-Analog Converter
FEATURES
1
24-Bit Resolution
23456
Analog Performance:
– Dynamic Range: 105 dB Typical
– SNR: 105 dB Typical
– THD+N: 0.002% Typical
– Full-Scale Output: 3.75 V
4×/8× Oversampling Interpolation Filter:
– Stop-Band Attenuation: –57 dB
– Pass-Band Ripple: ±0.015 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
Flexible Mode Control:
2
– SPI™/I
C™ Dual Mode for Serial Port
– Parallel Hardware Control with 4 Functions
User-Programmable Functions (in SPI/I
– Flexible Audio Data Formats:
2
– Right-Justified, I
S™, Left-Justified,
TDM, DSP
– 16- 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
– Oversampling Mode
User-Programmable Functions (in H/W):
– Flexible Audio Data Formats:
2
– Right-Justified, I
S, Left-Justified, TDM
– Soft Mute
– Digital De-Emphasis
– Oversampling Mode
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.
PowerPAD is a trademark of Texas Instruments.
2
System Two, Audio Precision are trademarks of Audio Precision, Inc.
3
SPI is a trademark of Motorola.
4
I2C, I2S are trademarks of NXP Semiconductors.
5
All other trademarks are the property of their respective owners.
6
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.
Power Supply Voltage: +5-V Analog, +3.3-V
Digital
Package: 28-Lead TSSOP PowerPAD™
Operation Temperature Range:
– –40°C to +85°C for Consumer Grade
– –40°C to +105°C for Automotive Audio
Typical
PP
Grade
APPLICATIONS
Car Audio External Amplifiers
Car Audio AVN Applications
, 384 f
, 512
Integrated A/V Receivers
S
S
DVD Movie and Audio Players
HDTV Receivers
DVD Add-On Cards for High-End PCs
Digital Audio Workstations
Other Multichannel Audio Systems
DESCRIPTION
2
C):
The
PCM1681
monolithic integrated circuits which feature an
eight-channel 24-bit audio digital-to-analog converter
(DAC) and support circuitry in small 28-lead TSSOP
PowerPAD packages. The DACs utilize Burr-Brown's
enhanced multilevel delta-sigma (ΔΣ) architecture to
achieve excellent signal-to-noise performance and a
high tolerance to clock jitter.
The PCM1681 and PCM1681-Q1 accept TDM
(time-division multiplexed) format in addition to
industry-standard audio data formats with 16- to
24-bit audio data width. Sampling rates up to 200 kHz
are supported. The PCM1681 and PCM1681-Q1
provide a sub-set of user-programmable functions
through a parallel control port, in addition to a full set
of user-programmable functions through a serial
control port, SPI, or I
–40°C to +85°C for consumer grade applications and
the PCM1681-Q1 supports –40°C to +105°C for
automotive audio grade systems.
PCM1681
PCM1681-Q1
SLES211B – FEBRUARY 2008 – REVISED JUNE 2008
and
PCM1681-Q1
are
CMOS
2
C. The PCM1681 supports
Copyright © 2008, Texas Instruments Incorporated

PCM1681-Q1 Summary of contents

  • Page 1

    ... SPI –40°C to +85°C for consumer grade applications and the PCM1681-Q1 supports –40°C to +105°C for automotive audio grade systems. PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 ...

  • Page 2

    ... Analog output load capacitance Digital output load capacitance PCM1681 Operating free-air temperature PCM1681-Q1 2 Submit Documentation Feedback (1) Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com PCM1681 and PCM1681-Q1 –0 6.5 V –0 4.0 V ±0.1 V ±0.1 V –0 0.3 V, < 4 –0 6.5 V –0 0.3 V, < 6 ± ...

  • Page 3

    ... 192 kHz, system clock = 128 0.486 V at BPZ input OUT CC Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 MIN TYP MAX UNIT 24 Bits 2 Right-justified ...

  • Page 4

    ... kHz kHz, system clock = 256 192 kHz, system clock = 128 PCM1681 PCM1681-Q1 28-pin TSSOP PowerPAD™ Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com MIN TYP MAX UNIT 0. 0.486 kΩ ...

  • Page 5

    ... ZR1/ZR1/FMT0 MS/ADR/FMT1 MC/SCL/DEMP MD/SDA/MUTE Copyright © 2008, Texas Instruments Incorporated PIN ASSIGNMENTS PCM1681 and PCM1681-Q1 PWP (TSSOP PowerPAD) PACKAGE (TOP VIEW SCK DATA1 6 23 BCK 7 22 LRCK DGND 10 19 DATA2 11 18 ...

  • Page 6

    ... C, de-emphasis control for H mute control for H format control input 1 for H H/W with narrow mode O/S, H/W with wide mode O/S, SPI select 2 C, format control input 0 for H/W Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com (1) ( (1) (2) (1) (2) (3) (1) (2) (1) (4) (1) (2) . ...

  • Page 7

    ... Digital Filter Multilevel With Delta-Sigma Function Modulator DAC Controller DAC DAC DAC Zero Detect Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 V Output Amp and OUT Low-Pass Filter Output Amp and V OUT Low-Pass Filter V ...

  • Page 8

    ... S G001 0.0 −0.5 −1.0 −1.5 −2.0 −2.5 −3.0 −3.5 −4.0 −4.5 −5 0 G003 Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com , and 24-bit data, unless otherwise 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 0.4 Frequency [ Figure 4. ...

  • Page 9

    ... G007 Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 , and 24-bit data, unless otherwise S DE-EMPHASIS ERROR – Frequency – kHz G006 Figure 6. DE-EMPHASIS ERROR ...

  • Page 10

    ... G009 ANALOG FILTER PERFORMANCE 100 1,000 f − Frequency − kHz Figure 11. Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com , and 24-bit data, unless otherwise S DE-EMPHASIS ERROR – Frequency – kHz Figure 10. 10,000 G011 Copyright © 2008, Texas Instruments Incorporated ...

  • Page 11

    ... G012 108 106 104 102 100 98 5.25 5.50 4.50 G014 Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 , 256 f , 128 S S DYNAMIC RANGE vs SUPPLY VOLTAGE 4.75 5.00 5.25 5.50 V – Supply Voltage – G013 Figure 13. ...

  • Page 12

    ... G016 108 106 104 102 100 110 −40 −15 G018 Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com , 256 f , 128 S S DYNAMIC RANGE vs TEMPERATURE 110 T − Free-Air Temperature − G017 Figure 17. CHANNEL SEPARATION vs ...

  • Page 13

    ... SYSTEM CLOCK INPUT The PCM1681 and PCM1681-Q1 require a system clock for operating the digital interpolation filters and multilevel ΔΣ modulators. The system clock is applied at the SCK input (pin 5). system clock frequencies for 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 14

    ... System Clock AUDIO SERIAL INTERFACE The audio serial interface for the PCM1681 and PCM1681-Q1 is comprised of a 6-wire synchronous serial port. It includes LRCK (pin 8), BCK (pin 7), and DATA1 (pin 6), DATA2 (pin 11), DATA3 (pin 12), and DATA4 (pin 13). BCK is the serial audio bit clock, and it is used to clock the serial data present on DATA1, DATA2, DATA3, and DATA4 into the audio interface serial shift register ...

  • Page 15

    ... Figure 23. Data formats are selected using the format bits, FMT[3:0], located in control register 9 of the PCM1681 and PCM1681-Q1. The default data format is 16- to 24-bit left-justified. All formats require binary 2s complement, MSB-first audio data. interface. DATA1, DATA2, DATA3, and DATA4 each carry two audio channels, designated as the left and right channels in ...

  • Page 16

    ... L-Channel N–2 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): PCM1681 PCM1681-Q1 www.ti.com R-Channel LSB MSB LSB MSB LSB R-Channel N– ...

  • Page 17

    ... CH2/CH6 CH3/CH7 32 BCKs 32 BCKs Figure 23. Audio Data Input Formats Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 LRW t LRW t LRW ...

  • Page 18

    ... S, left-justified, and DSP formats, there 1/ 1/ However, for TDM format, allowable 100 kHz for BCK = 128 f mode. S DE-EMPHASIS FILTER The PCM1681 and PCM1681-Q1 include a digital de-emphasis filter for 32 kHz, 44.1 kHz, and 48 kHz sampling frequencies. 18 Submit Documentation Feedback t t (BCL) (LH) t (DS) ...

  • Page 19

    ... Narrow mode Wide mode ZERO FLAG The PCM1681 and PCM1681-Q1 have two zero-flag pins, ZR1 (pin 1) and ZR2 (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 PCM1681 and PCM1681-Q1. If the input data of the L-channel and/or R-channel of all assigned channels remains at a logic-0 level for 1024 sampling periods (LRCK clock periods), ZR1 and ZR2 are set to logic-1 states, or high level ...

  • Page 20

    ... The MUTE pin controls all 8 channel outputs at the same time. SPI CONTROL INTERFACE The SPI control interface of the PCM1681 and PCM1681- 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 ...

  • Page 21

    ... Figure 25 IDX2 IDX1 IDX0 IDX2 IDX1 IDX0 Figure 26. Write Operation Timing Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 shows the control data word LSB Register Data R0001- ...

  • Page 22

    ... Submit Documentation Feedback , which define the minimum delays between the edges of the MS and MC t (MCL) t (MCY) t (MDS) t (MDH) PARAMETER Figure 27. Interface Timing Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com t (MHH) t (MSH) LSB T0013-03 MIN UNIT 100 (1) ...

  • Page 23

    ... 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 PCM1681s or PCM1681-Q1s can be connected on the same bus at one time. Each PCM1681 or PCM1681-Q1 responds when it receives its own slave address. PACKET PROTOCOL A master device must control packet protocol, which consists of a start condition, slave address, read/write bit, data if writing or acknowledge if reading, and stop condition ...

  • Page 24

    ... St: Start Condition W: Write ACK: Acknowledge Sp: Stop Condition READ OPERATION A master can read any PCM1681 or PCM1681-Q1 register using a single access. The master sends a PCM1681 or PCM1681-Q1 slave address with a read bit after transferring the register address. Then the PCM1681 or PCM1681-Q1 transfers the data in the register specified. ...

  • Page 25

    ... NH MODE CONTROL REGISTERS USER-PROGRAMMABLE MODE CONTROLS The PCM1681 and PCM1681-Q1 include 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 Mode Control section of this data sheet. reset default conditions and associated register index. ...

  • Page 26

    ... IDX3 IDX2 IDX1 IDX0 RSV RSV (2) (2) IDX3 IDX2 IDX1 IDX0 RSV RSV Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com BIT AT1[7:0], AT2[7:0], AT3[7:0], AT4[7:0], AT5[7:0], AT6[7:0], AT7[7:0], AT8[7:0] MUT[8:1], MUT[8:7] DAC[8:1], DAC[8:7] FMT[3:0] FLT DMC DMF[1:0] DREV ZREV SRST REV[8:1] ...

  • Page 27

    ... 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): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 AT15 ...

  • Page 28

    ... Default value: 0 OUT ), equal to V /2. DAC7 and DAC8 of register 8 and register 19 work COM CC B11 B10 IDX2 IDX1 IDX0 RSV RSV Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com MUT6 MUT5 MUT4 MUT3 MUT2 MUT1 RSV RSV RSV ...

  • Page 29

    ... The DREV bit allows the user to select the phase of the analog output signal. Copyright © 2008, Texas Instruments Incorporated B11 B10 ZREV Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 DREV DMF1 ...

  • Page 30

    ... ×32 oversampling, narrow ×16 oversampling, narrow mode (default) mode (default) ×64 oversampling, wide mode ×32 oversampling, wide mode Typical Characteristics Product Folder Link(s): PCM1681 PCM1681-Q1 www.ti.com REV6 REV5 REV4 REV3 REV2 ...

  • Page 31

    ... B10 DAMS AZRO1 AZRO0 B11 B10 ZERO8 ZERO7 ZERO6 2 C Interface Only) Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 RSV RSV RSV RSV ZERO5 ZERO4 ...

  • Page 32

    ... 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 PCM1681 and PCM1681-Q1 ΔΣ DACs. The frequency response of this filter is shown in the out-of-band noise to an acceptable level for most applications. An external low-pass filter is required to provide sufficient out-of-band noise rejection ...

  • Page 33

    ... DATA4 OUT MSEL OUT PCM1681 PCM1681-Q1 3 (2) (3) Figure 33. Basic Connection Diagram Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 Output Low-Pass Filter ...

  • Page 34

    ... The PCM1681 and PCM1681-Q1 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

    ... DGND PCM1681 PCM1681-Q1 AGND Analog Section Return Path for 3.3 V and Digital Signals D Figure 35. Recommended PCB Layout Product Folder Link(s): PCM1681 PCM1681-Q1 PCM1681 PCM1681-Q1 SLES211B – FEBRUARY 2008 – REVISED JUNE 2008 ± Output Circuits Digital Ground Analog Ground Submit Documentation Feedback ...

  • Page 36

    ... SLES211B – FEBRUARY 2008 – REVISED JUNE 2008.................................................................................................................................................... Changes from Revision A (June 2008) to Revision B Added new device grade PCM1681-Q1 Changed device names in Operating Free-Air Temperature row of the Recommended Operating Conditions table Changed device names in Operating Temperature row of Temperature Range section in the Electrical Characteristics table ...

  • Page 37

    ... ACTIVE PCM1681PWPG4 ACTIVE PCM1681PWPR ACTIVE PCM1681PWPRG4 ACTIVE PCM1681TPWPQ1 ACTIVE PCM1681TPWPQ1G4 ACTIVE PCM1681TPWPRQ1 ACTIVE PCM1681TPWPRQ1G4 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. ...

  • Page 38

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing PCM1681PWPR HTSSOP PWP PCM1681TPWPRQ1 HTSSOP PWP PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 28 2000 330.0 16.4 6.9 28 2000 330.0 16.4 6.9 Pack Materials-Page 1 5-Jul-2008 B0 (mm) ...

  • Page 39

    ... Device Package Type PCM1681PWPR HTSSOP PCM1681TPWPRQ1 HTSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) PWP 28 2000 PWP 28 2000 Pack Materials-Page 2 5-Jul-2008 Width (mm) Height (mm) 346.0 346.0 33.0 346.0 346.0 33.0 ...

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    ... 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’ ...