The PCM1770 and PCM1771 devices are CMOS, monolithic, integrated circuits which include stereo digital-to-analog converters, headphone circuitry, and support circuitry in small TSSOP-16 and VQFN-20 packages

PCM1770

Manufacturer Part NumberPCM1770
DescriptionThe PCM1770 and PCM1771 devices are CMOS, monolithic, integrated circuits which include stereo digital-to-analog converters, headphone circuitry, and support circuitry in small TSSOP-16 and VQFN-20 packages
ManufacturerTexas Instruments
PCM1770 datasheet
 


Specifications of PCM1770

# Dacs2# Inputs / # Outputs0 / 2
ArchitectureMultilevel Delta-SigmaResolution(bits)24
Sampling Rate(max)(khz)48Control InterfaceSPI
Digital Audio InterfaceL,R,I2SThd+n(typ)(%)0.04
Dac Snr(typ)(db)98Power Consumption(typ)(mw)6.5
Additional FeaturesHP OutOperating Temperature Range(c)0 to 70
Analog Voltage Av/dd(min)(v)1.6Analog Voltage Av/dd(max)(v)3.6
Pin/package16TSSOP, 20VQFN  
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Page 1/39

Download datasheet (651Kb)Embed
Next
Burr Brown Products
from Texas Instruments
LOW-VOLTAGE AND LOW-POWER STEREO AUDIO DIGITAL-TO-ANALOG CONVERTER
FEATURES
Multilevel DAC Including Headphone Amplifier
Analog Performance (V
, V
CC
– Dynamic Range: 98 dB Typ
– THD+N at 0 dB: 0.1% Typ
– THD+N at –20 dB: 0.04% Typ
– Output Power at R
= 16
L
(Stereo), 26 mW (Monaural)
1.6-V to 3.6-V Single Power Supply
Low Power Dissipation: 6.5 mW at V
2.4 V
System Clock: 128 f
, 192 f
S
S
Sampling Frequency: 5 kHz to 50 kHz
Software Control (PCM1770):
– 16-, 20-, 24-Bit Word Available
– Left-, Right-Justified, and I
– Slave/Master Selectable
– Digital Attenuation: 0 dB to –62 dB, 1
dB/Step
– 44.1-kHz Digital De-Emphasis
– Zero Cross Attenuation
– Digital Soft Mute
– Monaural Analog-In With Mixing
– Monaural Speaker Mode
Hardware Control (PCM1771):
2
– Left-Justified and I
S
– 44.1-kHz Digital De-Emphasis
– Monaural Analog-In With Mixing
Pop-Noise-Free Circuit
3.3-V Tolerant
Packages: TSSOP-16 and VQFN-20
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.
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.
WITH HEADPHONE AMPLIFIER
APPLICATIONS
Portable Audio Player
Cellular Phone
= 2.4 V):
HP
PDA
Other Applications Requiring Low-Voltage
Operation
: 13 mW
DESCRIPTION
The PCM1770 and PCM1771 devices are CMOS,
monolithic, integrated circuits which include stereo
, V
=
digital-to-analog converters, headphone circuitry, and
CC
HP
support circuitry in small TSSOP-16 and VQFN-20
packages.
, 256 f
, 384 f
S
S
The data converters use TI's enhanced multilevel -
architecture, which employs noise shaping and
multilevel amplitude quantization to achieve excellent
dynamic performance and improved tolerance to
2
clock jitter. The PCM1770 and PCM1771 devices
S
accept several industry standard audio data formats
with 16- to 24-bit data, left-justified, I
providing easy interfacing to audio DSP and decoder
devices. Sampling rates up to 50 kHz are supported.
A full set of user-programmable functions is
accessible through a 3-wire serial control port, which
supports register write functions.
PCM1770, PCM1771
SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007
2
S, etc.,
Copyright © 2001–2007, Texas Instruments Incorporated

PCM1770 Summary of contents

  • Page 1

    ... The PCM1770 and PCM1771 devices S accept several industry standard audio data formats with 16- to 24-bit data, left-justified, I providing easy interfacing to audio DSP and decoder devices ...

  • Page 2

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted ...

  • Page 3

    ... Stereo Monaural BPZ OUT CC (peak-to-peak) HP Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 and 24-bit data unless S L PCM1770PW, PCM1771PW, PCM1770RGA, PCM1771RGA MIN TYP MAX 128f , 192 f , 256 f , 384 0 0.3 V ...

  • Page 4

    ... HP S TEST CONDITIONS at 20 kHz BPZ input BPZ input (4) Power down BPZ input (4) Power down PCM1770PW, -71PW: 16-terminal TSSOP PCM1770RGA, -71RGA: 20-terminal VQFN Submit Documentation Feedback www.ti.com and 24-bit data unless S L PCM1770PW, PCM1771PW, PCM1770RGA, PCM1771RGA UNIT ...

  • Page 5

    ... AIN V COM OUT OUT 1 MS DATA MC 2 BCK AGND HGND HP 5 Submit Documentation Feedback PCM1770, PCM1771 PCM1771 PW PACKAGE (TOP VIEW) 16 SCKI 15 FMT 14 AMIX 13 DEMP AIN OUT P0001-02 PCM1771 RGA PACKAGE (TOP VIEW) ...

  • Page 6

    ... Mode control port serial data input. Controls the operation mode on the PCM1770 device Mode control port select. The control port is active when this terminal is low Reset input. When low, the PCM1770 device is powered down, and all mode control registers are reset to default settings. SCKI 16 I System clock input V 12 – ...

  • Page 7

    ... Monaural analog signal mixer input. The signal can be mixed with the outputs of the L- and R-channel DACs. BCK 2 I/O Serial bit clock. Clocks the individual bits of the audio data input, DATA. In the slave interface mode, this clock is input from an external device. In the master interface mode, the PCM1770 device generates the BCK output to an external device. DATA 1 I ...

  • Page 8

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 PCM1771PW TERMINAL I/O NAME NO. AGND 5 – Analog ground. This is a return for V AIN 10 – Monaural analog signal mixer input. The signal can be mixed with the outputs of the L- and R-channel DACs. AMIX 14 I Analog mixing control ...

  • Page 9

    ... HP S otherwise noted. 0.05 0.04 0.03 0.02 0.01 0.00 −0.01 −0.02 −0.03 −0.04 −0. 0 G001 Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 AIN Headphone Amplifier + H R OUT V V COM COM + H L OUT Power Supply ...

  • Page 10

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 TYPICAL PERFORMANCE CURVES (continued) All specifications 25° otherwise noted. De-Emphasis Curves DE-EMPHASIS LEVEL vs FREQUENCY 0 −1 −2 −3 −4 −5 −6 −7 −8 −9 −10 0.0 0.1 0.2 0.3 f – Frequency [ f Figure 3. TOTAL HARMONIC DISTORTION + NOISE ...

  • Page 11

    ... G007 102 101 100 100 −40 G009 Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 , 24-bit data, and unless S L CHANNEL SEPARATION vs SUPPLY VOLTAGE 1.6 2.0 2.4 2.8 3.2 3.6 V – Supply Voltage – Figure 8. DYNAMIC RANGE ...

  • Page 12

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 TYPICAL PERFORMANCE CURVES (continued) All specifications 25° otherwise noted. SIGNAL-TO-NOISE RATIO vs FREE-AIR TEMPERATURE 102 101 100 −40 − – Free-Air Temperature – Figure 11 ...

  • Page 13

    ... Jitter – ps Figure 15. 0 −20 −40 −60 −80 −100 −120 −140 G016 Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 , 24-bit data, and unless S L 600 700 G015 OUTPUT SPECTRUM (-60 dB 8192 100 f – ...

  • Page 14

    ... SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 System Clock, Reset, and Functions System Clock Input The PCM1770 and PCM1771 devices require a system clock for operating the digital interpolation filters and multilevel - modulators. The system clock is applied at terminal 16 (SCKI). clock frequencies for common audio sampling rates. ...

  • Page 15

    ... Power On/Off Reset The PCM1770/71 always must have the PD pin set from LOW to HIGH once after power-supply voltages V and V have reached the specified voltage range and stable clocks SCKI, BCK, and LRCK are being supplied HP for the power-on sequence. A minimum time after both the clock and power-supply requirements are ...

  • Page 16

    ... SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 Power-Up/-Down Sequence and Reset The PCM1770 device has two kinds of power-up/-down methods: the PD terminal through hardware control and PWRD (register 4, B0) through software control. The PCM1771 device has only the PD terminal through hardware control for the power-up/-down sequence ...

  • Page 17

    ... Data formats are selected using the format bits, FMT[2:0] of control register 3 in the case of the PCM1770 device, and are selected using the FMT terminal in the case of the PCM1771 device. The default data format is 24-bit, left-justified, slave mode. All formats require binary 2s complement, MSB-first audio data ...

  • Page 18

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 (1) Standard Data Format; L-Channel = HIGH, R-Channel = LOW (Slave Mode) LRCK BCK (= 16-Bit Right-Justified, BCK = DATA MSB 16-Bit Right-Justified, BCK = ...

  • Page 19

    ... DATA hold time (DH) ( the sampling frequency. S Figure 23. Audio Interface Timing (Slave Mode) t (BCL) t (BL) t (DH) PARAMETER Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 50 (LB MIN MAX (1) 1/( ...

  • Page 20

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 t (SCY) SCKI LRCK (Output) t (BCH) BCK (Output) t DATA t SCKI pulse cycle time (SCY) t LRCK edge from SCKI rising edge (DL) t BCK edge from SCKI rising edge (DB) t BCK pulse cycle time ...

  • Page 21

    ... DEMP DE-EMPHASIS FUNCTION Low 44.1-kHz de-emphasis OFF High 44.1-kHz de-emphasis ON Table 5. Analog Mixing Control AMIX ANALOG MIXING Low Analog mixing OFF High Analog mixing ON Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 Table 3 shows selectable formats, 21 ...

  • Page 22

    ... SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 Software Control (PCM1770) The PCM1770 device 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 software-control interface is a 3-wire serial port that operates asynchronously to the serial audio interface. ...

  • Page 23

    ... Control Interface Timing Requirements (PCM1770) Figure 27 shows a detailed timing diagram for the serial control interface. These timing parameters are critical for proper control port operation (MLS) t (MCH (MDS) PARAMETER MC pulse cycle time MC low-level time MC high-level time MS high-level time ...

  • Page 24

    ... SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 Mode Control Registers (PCM1770) User-Programmable Mode Controls The PCM1770 device has a number of user-programmable functions that can be accessed via mode control registers. The registers are programmed using the serial control interface, as discussed in the Software Control (PCM1770) section. ...

  • Page 25

    ... B7 B6 IDX2 IDX1 IDX0 MUTR MUTL OUT Register 02 B10 IDX2 IDX1 IDX0 RSV RSV Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 ATL5 ATL4 ATL3 ATL2 ATL1 R. OUT L OUT ...

  • Page 26

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 B15 B14 B13 B12 B11 0 IDX6 IDX5 IDX4 IDX3 IDX[6:0]: 000 0011b OVER: Oversampling Control Default value: 0 OVER = 0 128f oversampling S OVER = 1 192f , 256f , 384f oversampling The OVER bit controls the oversampling rate of the - D/A converters. When it operates at a low sampling rate, less than 24 kHz, this function is recommended ...

  • Page 27

    ... PWRD = 1 Power-down state This bit is used to enter into low-power mode. Note that PWRD has no reset function. When this bit is set to 1, the PCM1770 device enters low-power mode and all digital circuits are reset except the register states, which remain unchanged. Register 04 ...

  • Page 28

    ... Analog Input The PCM1770 and PCM1771 devices have an analog input, AIN (terminal 10). The AMIX bit (PCM1770) or the AMIX terminal (PCM1771) allows the user to mix AIN with the headphone outputs (H When in the mixing mode, an ac-coupling capacitor is needed for AIN. But if AIN is not used, AIN must be open and the AMIX bit (PCM1770) must be disabled or the AMIX terminal (PCM1771) must be low ...

  • Page 29

    ... Power Supplies and Grounding The PCM1770 and PCM1771 devices require a 2.4-V typical analog supply for V supplies power the DAC, analog output filter, and other circuits. For best performance, these 2.4-V supplies ...

  • Page 30

    ... PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 APPLICATION INFORMATION (continued) Audio DSP Controller LRCK SCKI 1 16 DATA BCK PCM1770 5 AGND HGND AIN 7 10 COM OUT OUT ...

  • Page 31

    ... BCK for data formats (2), (3), and (4) Added new subsection, Short-Circuit Protection, with information concerning protection of output Revision History .................................................................................................... ..................................................................................................... ...................................................................................................................................... 1 ............................................................................................................................. 2 sheet................................................................................. 2 tables.............................................................................................................. 6 and Figure 14.............................................................................................................. 12 Submit Documentation Feedback PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 ................................................................ 30 ................................................ 2 ................................................... 18 pins........................... 29 Page Page 31 ...

  • Page 32

    ... PACKAGING INFORMATION (1) Orderable Device Status PCM1770PW ACTIVE PCM1770PWG4 ACTIVE PCM1770PWR ACTIVE PCM1770PWRG4 ACTIVE PCM1770RGA ACTIVE PCM1770RGAG4 ACTIVE PCM1770RGAR ACTIVE PCM1770RGARG4 ACTIVE PCM1771PW ACTIVE PCM1771PWG4 ACTIVE PCM1771PWR ACTIVE PCM1771PWRG4 ACTIVE PCM1771RGA ACTIVE PCM1771RGAG4 ACTIVE PCM1771RGAR ACTIVE PCM1771RGARG4 ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs ...

  • Page 33

    MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date ...

  • Page 34

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing PCM1770PWR TSSOP PW PCM1770RGAR VQFN RGA PCM1771PWR TSSOP PW PCM1771RGAR VQFN RGA PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 16 2000 330.0 17.4 6.8 20 2000 330.0 13 ...

  • Page 35

    ... Device Package Type PCM1770PWR TSSOP PCM1770RGAR VQFN PCM1771PWR TSSOP PCM1771RGAR VQFN PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2000 RGA 20 2000 PW 16 2000 RGA 20 2000 Pack Materials-Page 2 8-Aug-2008 Width (mm) Height (mm) 346.0 346.0 33.0 346.0 346 ...

  • Page 36

    ...

  • Page 37

    ...

  • Page 38

    ...

  • Page 39

    ... 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’ ...