Cirrus-logic CS5381 Bedienungsanleitung PDF herunterladen

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120 dB, 192 kHz, Multi-Bit Audio A/D Converter

Features

! Advanced Multi-bit Delta-Sigma Architecture

! 24-bit Conversion

! 120 dB Dynamic Range

! -110 dB THD+N

! Supports All Audio Sample Rates Including

192 kHz

! 260 mW Power Consumption

! High-Pass Filter or DC Offset Calibration

! Supports Logic Levels between 5 and 2.5 V

! Differential Analog Architecture

! Low-Latency Digital Filtering

! Overflow Detection

! Pin-Compatible with the CS5361

General Description

The CS5381 is a complete analog-to-digital converter

for digital audio systems. It performs sampling, analog-

to-digital conversion, and anti-alias filtering - generating

24-bit values for both left and right inputs in serial form

at sample rates up to 216 kHz per channel.

The CS5381 uses a 5th-order, multi-bit delta-sigma

modulator followed by digital filtering and decimation,

which removes the need for an external anti-alias filter.

The ADC uses a differential architecture which provides

excellent noise rejection.

The CS5381 is available in 24-pin TSSOP and SOIC

packages for Commercial grade (-10° to +70° C). The

CDB5381 Customer Demonstration board is also avail-

able for device evaluation and implementation

suggestions. Please refer to the “Ordering Information”

on page 22.

The CS5381 is ideal for audio systems requiring wide

dynamic range, negligible distortion, and low noise -

such as A/V receivers, DVD-R, CD-R, digital mixing

consoles, and effects processors.

Interface Supply

2.5 V to 5 V

Internal Voltage

Reference

Level Translator

Digital Supply

3.3 V to 5 V

Mode

Configuration

Analog Supply

5 V

Switch-Cap

ADC

Differential

Inputs

Digital

Filters

PCM Serial

Audio Output

Switch-Cap

ADC

Differential

Inputs

Digital

Filters

OVFL

HPF

Reset

JULY '05

DS563F2

CS5381

1 2 3 4 5 6 ... 23 24

Inhaltsverzeichnis

Seite 1 - General Description

Seite 2 - TABLE OF CONTENTS

10 DS563F2CS5381SWITCHING CHARACTERISTICS - SERIAL AUDIO PORT(Logic “0” = GND = 0 V; Logic “1” = VL, CL = 20 pF) Parameter Symbol Min Typ Max UnitOutp

Seite 3 - LIST OF TABLES

DS563F2 11CS5381 Figure 13. Master Mode, Left-Justified SAI Figure 14. Slave Mode, Left-Justified SAISCLK outputSDOUTLRCK outputMSB MSB-1 MSB-2 MS

Seite 4 - 1. PIN DESCRIPTIONS

12 DS563F2CS5381Figure 18. Left-Justified Serial Audio InterfaceSDATA 23 22 7 6 23 22SCLKLRCK23 225432108 7654321089 9Left Channel Right ChannelFigur

Seite 5 - ABSOLUTE MAXIMUM RATINGS

DS563F2 13CS5381DC ELECTRICAL CHARACTERISTICS(GND = 0 V, all voltages with respect to ground. MCLK=12.288 MHz; Master Mode)8. Power-Down Mode is defin

Seite 6 - ±100 - ppm/°C

14 DS563F2CS5381TYPICAL CONNECTION DIAGRAMFILT+AINL+AINL-VD0.01µFA/D CONVERTERSCLKCS5381M/SMCLKAINR+AINR-VQ**47µF+RSTVA VL+5V1µF+5Vto 2.5 V5.1Ω1µF++ +

Seite 7

DS563F2 15CS53813. APPLICATIONS3.1 Operational Mode/Sample Rate Range SelectThe output sample rate, Fs, can be adjusted from 2 kHz to 216 kHz. The CS5

Seite 8 - 8 DS563F2

16 DS563F2CS53813.2.2 Slave ModeLRCK and SCLK operate as inputs in Slave mode. It is recommended that the left/right clock be synchro-nously derived f

Seite 9 - DS563F2 9

DS563F2 17CS53813.5 High-Pass Filter and DC Offset CalibrationThe operational amplifiers in the input circuitry driving the CS5381 may generate a sma

Seite 10

18 DS563F2CS53813.6 Overflow DetectionThe CS5381 includes overflow detection on both the left and right channels. This time multiplexed informa-tion i

Seite 11 - DS563F2 11

DS563F2 19CS53813.9 Capacitor Size on the Reference Pin (FILT+)The CS5381 requires an external capacitance on the internal reference voltage pin, FILT

Seite 12 - 12 DS563F2

2 DS563F2CS5381TABLE OF CONTENTS1. PIN DESCRIPTIONS ...

Seite 13 - THERMAL CHARACTERISTICS

20 DS563F2CS53814. PACKAGE DIMENSIONSINCHES MILLIMETERSDIM MIN MAX MIN MAXA 0.093 0.104 2.35 2.65A1 0.004 0.012 0.10 0.30B 0.013 0.020 0.33 0.51C 0.00

Seite 14 - TYPICAL CONNECTION DIAGRAM

DS563F2 21CS5381Notes:1. “D” and “E1” are reference datums and do not included mold flash or protrusions, but do include moldmismatch and are measured

Seite 15 - 3. APPLICATIONS

22 DS563F2CS53815. ORDERING INFORMATIONProduct Description Package Pb-Free Grade Temp RangeContainer Order #CS5381120 dB, 192 kHz, Multi-Bit Audio A/D

Seite 16 - 3.4 Analog Connections

DS563F2 23CS53816 PARAMETER DEFINITIONSDynamic RangeThe ratio of the rms value of the signal to the rms sum of all other spectral components over the

Seite 17 - the output of the decimation

24 DS563F2CS53817. REVISION HISTORYRelease Date ChangesA1 December 2002Initial ReleaseA2 October 2003Changed front page description of digital filterI

Seite 18 - 3.6.2 OVFL Output Timing

DS563F2 3CS5381LIST OF FIGURESFigure 1. Single-Speed Mode Stopband Rejection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seite 19 - DS563F2 19

4 DS563F2CS53811. PIN DESCRIPTIONSPin Name # Pin DescriptionRST1Reset (Input) - The device enters a low power mode when low. M/S2Master/Slave Mode (In

Seite 20 - 4. PACKAGE DIMENSIONS

DS563F2 5CS53812. CHARACTERISTICS AND SPECIFICATIONSAll Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditi

Seite 21

6 DS563F2CS5381ANALOG CHARACTERISTICS (CS5381-KSZ/-KZZ)Test conditions (unless otherwise specified): Input test signal is a 1 kHz sine wave; measureme

Seite 22 - 5. ORDERING INFORMATION

DS563F2 7CS5381DIGITAL FILTER CHARACTERISTICS6. The filter frequency response scales precisely with Fs.7. Response shown is for Fs equal to 48 kHz. Fi

Seite 23 - 6 PARAMETER DEFINITIONS

8 DS563F2CS5381Figure 1. Single-Speed Mode Stopband Rejection Figure 2. Single-Speed Mode Transition Band-140-130-120-110-100-90-80-70-60-50-40-30-2

Seite 24 - 7. REVISION HISTORY

DS563F2 9CS5381Figure 7. Double-Speed Mode Transition Band (Detail) Figure 8. Double-Speed Mode Passband Ripple -10-9-8-7-6-5-4-3-2-100.40 0.43 0.45