The PCM1780/81/82 is a CMOS, monolithic, integrated circuit, which includes stereo digital-to-analog converters and support circuitry in a small 16-lead SSOP package

PCM1780

Manufacturer Part NumberPCM1780
DescriptionThe PCM1780/81/82 is a CMOS, monolithic, integrated circuit, which includes stereo digital-to-analog converters and support circuitry in a small 16-lead SSOP package
ManufacturerTexas Instruments
PCM1780 datasheet
 


Specifications of PCM1780

# Dacs2# Inputs / # Outputs0 / 2
ArchitectureDelta-SigmaResolution(bits)24
Sampling Rate(max)(khz)192Control InterfaceSPI
Digital Audio InterfaceL,R,I2SThd+n(typ)(%)0.002
Dac Snr(typ)(db)106Power Consumption(typ)(mw)80
Operating Temperature Range(c)-20 to 85Analog Voltage Av/dd(min)(v)4.5
Analog Voltage Av/dd(max)(v)5.5Pin/package16SSOP/QSOP
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Burr Brown Products
from Texas Instruments
24-Bit, 192-kHz Sampling, Enhanced Multilevel, Delta-Sigma,
FEATURES
24-Bit Resolution
Analog Performance (V
= 5 V):
CC
– Dynamic Range: 106 dB
– SNR: 106 dB, Typical
– THD+N: 0.002%, Typical
– Full-Scale Output: 3.9 Vp-p, Typical
4×/8× Oversampling Digital Filter:
– Stop-Band Attenuation: –50 dB
– Pass-Band Ripple: ±0.04 dB
Sampling Frequency: 5 kHz to 200 kHz
System Clock: 128 f
, 192 f
S
512 f
, 768 f
, 1152 f
With Autodetect
S
S
S
Software Control (PCM1780, PCM1782):
– Accepts 16-, 18-, 20-, and 24-Bit Audio Data
– Formats: Right-Justified, I
Left-Justified
– Digital Attenuation: Mode Selectable
0 dB to –63 dB, 0.5 dB/step
0 dB to –100 dB, 1 dB/step
– Digital De-Emphasis
– Digital Filter Rolloff: Sharp or Slow
– Soft Mute
– Zero Flags for Each Output
– Open-Drain Output Zero Flag (PCM1782)
Hardware Control (PCM1781):
2
– I
S and 16-Bit Word, Right-Justified
– Digital De-Emphasis
– Soft Mute
– Zero Flag for L-, R-Channel Common
Output
Power Supply: 5-V Single Supply
Small, 16-Lead SSOP Package (150 mil)
Pin-Compatible with PCM1680
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.
All other trademarks are the property of their respective owners.
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.
Audio Digital-to-Analog Converter
APPLICATIONS
A/V Receivers
DVD Movie Players
DVD Add-On Cards For High-End PCs
DVD Audio Players
HDTV Receivers
Car Audio Systems
Other Applications Requiring 24-Bit Audio
DESCRIPTION
The
PCM1780/81/82
integrated
digital-to-analog converters and support circuitry in a
, 256 f
, 384 f
,
S
S
S
small 16-lead SSOP package. The data converters
use TI’s enhanced multilevel delta-sigma architecture
to achieve excellent dynamic performance and
improved
PCM1780/81/82 accepts industry standard audio
2
S, and
data formats with 16- to 24-bit data, providing easy
interfacing to audio DSP and decoder chips.
Sampling rates up to 200 kHz are supported. The
PCM1780/82
user-programmable functions through a three-wire
serial control port, which supports register write
functions. The PCM1781 provides a subset of
user-programmable functions through four control
pins.
The PCM1780 is pin-compatible with the PCM1680
(8-channel DAC).
PCM1780, PCM1781, PCM1782
SLES132B – MARCH 2005 – REVISED AUGUST 2006
is
a
CMOS,
monolithic,
circuit,
which
includes
tolerance
to
clock
jitter.
provides
a
full
set
Copyright © 2005–2006, Texas Instruments Incorporated
stereo
The
of

PCM1780 Summary of contents

  • Page 1

    ... The PCM1781 provides a subset of user-programmable functions through four control pins. The PCM1780 is pin-compatible with the PCM1680 (8-channel DAC). PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 is ...

  • Page 2

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure ...

  • Page 3

    ... Pass-band ripple Stop-band attenuation (1) Pins SCK, DATA, BCK, LRCK (2) Pins MS, MC, MD (PCM1780/PCM1782). Pins FMT, DEMP0, DEMP1, MUTE (PCM1781) (3) Pins 1, 16: ZEROL, ZEROR (PCM1780). Pin 16: ZEROA (PCM1781) (4) Pins 1, 16: ZEROL, ZEROR (PCM1780/PCM1782). Pin 16: ZEROA (PCM1781) (5) Analog performance specifications are measured using the System Two™ Cascade audio measurement system by Audio Precision™. ...

  • Page 4

    ... SLES132B – MARCH 2005 – REVISED AUGUST 2006 ELECTRICAL CHARACTERISTICS (continued) All specifications 25° PARAMETER Filter Characteristics (Slow Rolloff, PCM1780/PCM1782) Pass band Stop band Pass-band ripple Stop-band attenuation Delay time De-emphasis error ANALOG FILTER PERFORMANCE Frequency response ...

  • Page 5

    ... Zero flag output for L- and R-channels (1) Schmitt-trigger input (2) Pulldown DEVICE INFORMATION (continued) (1) (1) (1) (1) (2) (1) (2) (1) (2) (1) (3) TERMINAL FUNCTIONS—PCM1781 (1) (1) (1) (2) (1) (2) (1) (2) (1) (1) (2) (1) Submit Documentation Feedback PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 (3) (1) (2) 5 ...

  • Page 6

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 BCK Audio LRCK Serial DATA Port (FMT) MS (DEMP0) Serial Control MC (DEMP1) Port MD (MUTE) (TEST) System Clock System SCK Clock Manager (1) Open-drain output for the PCM1782 NOTE: Signal names in parentheses ( ) are for the PCM1781. ...

  • Page 7

    ... S G003 Submit Documentation Feedback PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 , and 24-bit data, unless otherwise noted S PASS-BAND FREQUENCY RESPONSE (SHARP ROLLOFF) 0.1 0.2 0.3 0.4 Frequency [ Figure 2. TRANSITION CHARACTERISTICS (SLOW ROLLOFF) ...

  • Page 8

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 TYPICAL PERFORMANCE CURVES (Continued) All specifications 25° De-Emphasis Filter DE-EMPHASIS 0 −1 −2 −3 −4 −5 −6 −7 −8 −9 − – Frequency – kHz Figure 5. DE-EMPHASIS 0 − ...

  • Page 9

    ... Frequency − kHz Figure 11. Submit Documentation Feedback PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 , and 24-bit data, unless otherwise noted S DE-EMPHASIS ERROR kHz – ...

  • Page 10

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 TYPICAL PERFORMANCE CURVES (Continued) All specifications 25° Analog Dynamic Performance Supply Voltage Characteristics THD+N vs SUPPLY VOLTAGE 0.01 0.001 4.50 4.75 5.00 V − Supply Voltage − Figure 12. SIGNAL-TO-NOISE RATIO vs SUPPLY VOLTAGE ...

  • Page 11

    ... G016 110 108 106 104 102 100 −25 G018 Submit Documentation Feedback PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 , and 24-bit data, unless otherwise noted S DYNAMIC RANGE vs TEMPERATURE − Free-Air Temperature − Figure 17. ...

  • Page 12

    ... SLES132B – MARCH 2005 – REVISED AUGUST 2006 SYSTEM CLOCK AND RESET FUNCTIONS System Clock Input The PCM1780/81/82 requires a system clock for operating the digital interpolation filters and multilevel delta-sigma modulators. The system clock is applied at the SCK input (pin 5). system clock frequencies for common audio sampling rates. ...

  • Page 13

    ... DATA into the serial shift register of the audio interface. Serial data is clocked into the PCM1780/81/82 on the rising edge of BCK. LRCK is the serial audio left/right word clock used to latch serial data into the internal registers of the serial audio interface. ...

  • Page 14

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 (1) Right-Justified Data Format; L-Channel = HIGH, R-Channel = LOW LRCK BCK (= 16-Bit Right-Justified, BCK = DATA MSB 16-Bit Right-Justified, BCK = DATA ...

  • Page 15

    ... DATA hold time (DH) ( the sampling frequency (e.g., 44.1 kHz, 48 kHz, 96 kHz, etc.). S t (BCL) t (BCY) (LH) (DS) t (DH) Figure 23. Audio Interface Timing Submit Documentation Feedback PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 t (LS) T0010-03 MIN UNIT (1) 1/( 1/( 1/( ...

  • Page 16

    ... SLES132B – MARCH 2005 – REVISED AUGUST 2006 OVERSAMPLING RATE CONTROL The PCM1780/81/82 automatically controls the oversampling rate of the delta-sigma D/A converters with the system clock frequency. The oversampling rate is set to 64× oversampling with an 1152-f system clock, to 32× oversampling with a 384-f 128-f system clock ...

  • Page 17

    ... SOFTWARE CONTROL (PCM1780/82) The PCM1780/82 has many programmable functions that can be controlled in the software control mode; the functions are controlled by programming the internal registers using MS, MC, and MD. The serial control interface is a 3-wire serial port which operates asynchronously to the audio serial interface. ...

  • Page 18

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 MS t (MSS) t (MCH pulse cycle time (MCY low-level time (MCL high-level time (MCH high-level time (MHH falling edge to MC rising edge (MSS) ( hold time ...

  • Page 19

    ... MODE CONTROL REGISTERS (PCM1780/82) User-Programmable Mode Controls The PCM1780/82 includes a number of user-programmable functions, which are accessed via control registers. The registers are programmed using the serial control interface, which was previously discussed in the Software Control section of this data sheet. ...

  • Page 20

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 Register Definitions B15 B14 B13 B12 REGISTER 16 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 B15 B14 B13 B12 REGISTER 17 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 ATx[7:0]: Digital Attenuation Level Setting ...

  • Page 21

    ... 384 f and sampling clock frequency 192 f and sampling clock frequency S S Submit Documentation Feedback PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 RSV RSV RSV RSV MUT2 MUT1 2). ...

  • Page 22

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 B15 B14 B13 B12 REGISTER 19 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 NOTE: RSV indicates a reserved bit that should be set to 0. DACx: DAC Operation Control Where corresponding to the DAC output V ...

  • Page 23

    ... The DAMS bit is used to select the digital attenuation mode. B11 B10 RSV RSV B11 B10 RSV RSV Submit Documentation Feedback PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 FLT RSV RSV FMT2 FMT1 RSV ...

  • Page 24

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 B15 B14 B13 B12 REGISTER 22 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 NOTE: RSV indicates a reserved bit that should be set to 0. DREV: Output Phase Select Default value: 0 DREV = 0 Normal output (default) ...

  • Page 25

    ... 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 PCM1780/81/82 delta-sigma D/A converters. The frequency response of this filter is shown as ANALOG FILTER in the Typical Performance Curves section. By itself, this filter is not enough to attenuate the out-of-band noise to an acceptable level for many applications ...

  • Page 26

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 Connection Diagrams A basic connection diagram is shown in components. TI recommends using the component values shown in The use of series resistors (22 series resistor combines with the stray PCB and device input capacitance to form a low-pass filter which reduces high-frequency noise emissions and helps to dampen glitches and ringing present on clock and data lines ...

  • Page 27

    ... The PCM1780/81/82 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 28

    ... PCM1780, PCM1781, PCM1782 SLES132B – MARCH 2005 – REVISED AUGUST 2006 APPLICATION INFORMATION (continued) Digital Power +V DGND D Digital Logic and Audio Processor Digital Section RF Choke or Ferrite Bead V DD Digital Logic and Audio Processor Digital Section 28 Analog Power AGND +5VA V CC PCM1780/81/82 ...

  • Page 29

    ... PACKAGING INFORMATION (1) Orderable Device Status PCM1780DBQ ACTIVE PCM1780DBQG4 ACTIVE PCM1780DBQR ACTIVE PCM1780DBQRG4 ACTIVE PCM1781DBQ ACTIVE PCM1781DBQG4 ACTIVE PCM1781DBQR ACTIVE PCM1781DBQRG4 ACTIVE PCM1782DBQ ACTIVE PCM1782DBQG4 ACTIVE PCM1782DBQR ACTIVE PCM1782DBQRG4 ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. ...

  • Page 30

    In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold Customer on an annual basis. PACKAGE OPTION ADDENDUM Addendum-Page 2 ...

  • Page 31

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing PCM1780DBQR SSOP/ DBQ QSOP PCM1781DBQR SSOP/ DBQ QSOP PCM1782DBQR SSOP/ DBQ QSOP PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 16 2000 330.0 12 ...

  • Page 32

    ... Device Package Type PCM1780DBQR SSOP/QSOP PCM1781DBQR SSOP/QSOP PCM1782DBQR SSOP/QSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DBQ 16 2000 DBQ 16 2000 DBQ 16 2000 Pack Materials-Page 2 11-Mar-2008 Width (mm) Height (mm) 346.0 346.0 29.0 346.0 346.0 29.0 346.0 346.0 29.0 ...

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  • Page 35

    ... 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’ ...