cs5331a Cirrus Logic, Inc., cs5331a Datasheet

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cs5331a

Manufacturer Part Number
cs5331a
Description
8-pin, Stereo A/d Converter For Digital Audio
Manufacturer
Cirrus Logic, Inc.
Datasheet

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Features
Single +5 V Power Supply
18-Bit Resolution
94 dB Dynamic Range
Linear Phase Digital Anti-Alias Filtering
Low Power Dissipation: 150 mW
Complete CMOS Stereo A/D System
Adjustable System Sampling Rates including
32kHz, 44.1 kHz & 48kHz
AGND
http://www.cirrus.com
AINR
AINL
0.05dB Passband Ripple
80dB Stopband Rejection
Power-Down Mode for Portable
Applications
Delta-Sigma A/D Converters
Digital Anti-Alias Filtering
S/H Circuitry and Voltage Reference
8
5
6
8-Pin, Stereo A/D Converter for Digital Audio
VA+
S/H
S/H
7
Voltage Reference
LP Filter
LP Filter
DAC
DAC
Comparator
Comparator
Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
General Description
The CS5330A/31A is a complete stereo analog-to-digi-
tal converter that performs anti-alias filtering, sampling
and analog-to-digital conversion generating 18-bit val-
ues for both left and right inputs in serial form. The
output sample rate can be infinitely adjusted between
2 kHz and 50 kHz.
The CS5330A/31A operates from a single +5 V supply
and requires only 150 mW for normal operation, making
it ideal for battery-powered applications.
The ADC uses delta-sigma modulation with 128X over-
sampling, followed by digital filtering and decimation,
which removes the need for an external anti-alias filter.
The linear-phase digital filter has a passband to
21.7 kHz, 0.05 dB passband ripple and >80 dB stop-
band rejection. The device also contains a high-pass fil-
ter to remove DC offsets.
The device is available in an 8-pin SOIC package in
both Commerical (
(- 40° to +85° C)
on page 16
Digital Decimation
Digital Decimation
MCLK
Filter
Filter
4
for complete details.
Serial Output Interface
. Please refer to
SCLK
-10° to +70° C) and
2
CS5330A/31A
LRCK
High
Pass
Filter
High
Pass
Filter
3
“Ordering Information”
Automotive grades
1
SDATA
APRIL '06
DS138F5

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cs5331a Summary of contents

Page 1

... C) on page 16 LP Filter Digital Decimation Comparator DAC Digital Decimation LP Filter Comparator DAC Copyright © Cirrus Logic, Inc. 2006 (All Rights Reserved) CS5330A/31A Automotive grades -10° to +70° C) and . Please refer to “Ordering Information” for complete details. MCLK SCLK ...

Page 2

... ORDERING INFORMATION ................................................................................................. 16 8. REVISION HISTORY .............................................................................................................. 16 LIST OF FIGURES Figure 1. Typical Connection Diagram......................................................................................... 8 Figure 2. Data Output Timing-CS5330A .................................................................................... 10 Figure 3. Data Output Timing - CS5331A (I²S Compatible) ....................................................... 10 Figure 4. CS5330A/31A Initialization and Power-Down Sequence............................................ 12 Figure 5. CS5330A/31A Digital Filter Stopband Rejection......................................................... 13 Figure 6. CS5330A/31A Digital Filter Transition Band ............................................................... 13 Figure 7. ...

Page 3

PIN DESCRIPTIONS SERIAL DATA OUTPUT SERIAL DATA CLOCK LEFT/RIGHT CLOCK MASTER CLOCK Pin Name # Pin Description Audio Serial Data Output (Output) - Two’s complement MSB-first serial data is output on this SDATA 1 pin kΩ resistor ...

Page 4

CHARACTERISTICS AND SPECIFICATIONS (All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. Typical performance characteristics and specifications are derived from measurements taken at nominal supply voltages and T = 25°C.) A SPECIFIED OPERATING CONDITIONS (AGND = ...

Page 5

ANALOG INPUT CHARACTERISTICS (-1 dBFS Input Sinewave, 997 Hz; Measurement Bandwidth kHz unless otherwise specified; Logic 0 = 0V, Logic 1 = VD+) Parameter Dynamic Performance Dynamic Range A-weighted unweighted Total Harmonic Distortion + Noise ...

Page 6

DIGITAL CHARACTERISTICS Parameter High-Level Input Voltage Low-Level Input Voltage High-Level Output Voltage -20 µA Low-Level Output Voltage µA Input leakage Current DIGITAL FILTER CHARACTERISTICS ( kHz) Parameter Passband Passband Ripple Stopband ...

Page 7

SWITCHING CHARACTERISTICS (Inputs: Logic 0 = 0V, Logic 1 = VA+; C Parameter Output Sample Rate MCLK Period MCLK Low MCLK High MCLK Period MCLK Low MCLK High MCLK Period MCLK Low MCLK High MASTER MODE SCLK falling to LRCK ...

Page 8

... SCLK to SDATA LRCK - MASTER mode (CS5331A sclkl sclkh SCLK input (SLAVE mode) t sclkw LRCK input (SLAVE mode) t dss MSB-1 MSB-2 SDATA SCLK to LRCK & SDATA - SLAVE mode (CS5331A) 0.1 µ VA+ 8 AINL MCLK CS5330A CS5331A SCLK 5 LRCK AINR SDATA AGND 6 Figure 1 ...

Page 9

... In Master mode, SCLK and LRCK are outputs which are internally derived from MCLK. The CS5330A/31A will divide MCLK generate a SCLK which is 64× Fs and by 256 to generate LRCK. The CS5330A and CS5331A can be placed in the Master mode with a 47 kohm pull-down resistor on the SDATA pin as shown in Figure 1. ...

Page 10

... LRCK transitions and the MSB of the data. The falling edges of SCLK cause the ADC to output the eigh- teen data bits. The data bits are valid during the rising edge of SCLK. LRCK is also inverted compared to the CS5330A interface. The CS5331A interface is compatible with I LRCK ...

Page 11

Analog Connections Figure 1 shows the analog input connections. The analog inputs are presented to the modula-tors via the AINR and AINL pins. Each analog input will accept a maximum of 4 Vpp centered at +2.4 V. The CS5330A/31A ...

Page 12

... Figure 4. CS5330A/31A Initialization and Power-Down Sequence The CS5330A and CS5331A have a Power-Down mode wherein typical consumption drops to 0.5 mW. This is initiated when a loss of clock is detected on either the LRCK or MCLK pins in Slave Mode, or the MCLK pin in Master Mode. The initialization sequence will begin when MCLK, and LRCK for slave mode, are restored ...

Page 13

Digital Filter Figures 5 through 8 show the attenuation characteristics of the digital filter included in the ADC. The filter response scales linearly with sample rate. The x-axis has been normalized to Fs, and can be scaled by multiplying ...

Page 14

PARAMETER DEFINITIONS Resolution The total number of possible output codes is equal where N = the number of bits in the output word for each channel. Dynamic Range The ratio of the full-scale rms value of ...

Page 15

REFERENCES 1. Area Efficient Decimation Filter for an 18-Bit Delta- Sigma ADC Lin and J.J. Paulos. Paper presented at the 98th Convention of the Audio Engineering Society, February 1995 18-Bit, 8-Pin Stereo Digital-to-Analog Converter, by ...

Page 16

... CS5330A/31A Container Order # Bulk CS5330A-KS Tape & Reel CS5330A-KSR Bulk CS5331A-KS Tape & Reel CS5331A-KSR Bulk CS5330A-KSZ Tape & Reel CS5330A-KSZR Bulk CS5331A-KSZ Tape & Reel CS5331A-KSZR Bulk CS5330A-BS Tape & Reel CS5330A-BSR Bulk CS5331A-DSZ Tape & Reel CS5331A-DSZR DS138F5 ...

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