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PDF CDB4461 Data sheet ( Hoja de datos )

Número de pieza CDB4461
Descripción Multi-Bit A/D for Class-D Real-Time PSR Feedback
Fabricantes Cirrus Logic 
Logotipo Cirrus Logic Logotipo



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CS4461
Multi-Bit A/D for Class-D Real-Time PSR Feedback
Features
z Advanced Multi-bit Delta-Sigma Architecture
z Real-time Feedback of Power Supply
Conditions (AC and DC)
z Filterless Digital Output Resulting in Very Low
Signal Delay
z 135 mW Power Consumption
z Supports Logic Levels Between 3.3 V and
5.0 V
z Differential Analog Architecture
z Modulator Overflow Detection
z Interfaces Directly to the CS44800/CS44600
Class-D PWM Modulator
z Multi-bit Conversion at up to 7.5 MHz
z Delivers Modulated Data Over 2-Wire Interface
General Description
The CS4461 is a complete analog-to-digital converter
for class-D real-time power supply rejection (PSR) feed-
back. It performs sampling and analog-to-digital
conversion, generating digital data for input to a
class-D modulator with real-time PSR feedback
capabilities.
The CS4461 uses a 5th-order, multi-bit delta-sigma
modulator followed by output data formatting. The ADC
uses a differential architecture which provides excellent
noise rejection.
The CS4461 feeds back the AC and DC voltage compo-
nents and is ideal for class-D audio systems requiring
high power supply rejection.
The CS4461 is available in a 24-pin TSSOP package in
both Commercial (-10° to +70° C) and Automotive
grade (-40° to +85° C). The CDB44800 Customer Dem-
onstration board is also available for device evaluation
and implementation suggestions. Please see “Ordering
Information” on page 11 for complete details.
FILT+
VQ REFGND
Voltage Reference
PSR_RESET PSR_EN
AIN+
AIN-
+
-
S/H
LP Filter
DAC
∆Σ
Output Data
Formatting
OVERFLOW
PSR_MCLK
PSR_SYNC
PSR_DATA
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5.0 V
(VA)
GND
3.3 V to 5.0 V
(VDP)
Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
SEPTEMBER '05
DS650F1

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CDB4461 pdf
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CS4461
ANALOG CHARACTERISTICS
(Test conditions (unless otherwise specified): Input test signal is a 1 kHz sine wave; measurement bandwidth is
10 Hz to 20 kHz.)
Parameter
DC Accuracy
Gain Error
Gain Drift
Analog Input Characteristics
Full-scale Differential Input Voltage
AIN+/AIN- Input Range
(VA = 5.0 V)
Input Impedance (Differential)
Common Mode Rejection Ratio
Symbol Min
-CZZ
-DZZ
-CZZ
-DZZ
(Note 6)
CMRR
-
-
-
1.1
1.1
18
-
Typ
-
±100
1.13*VA
1.13*VA
-
-
-
82
Max
±5
-
-
-
3.9
3.9
-
-
Unit
%
ppm/°C
VPP
VPP
V
V
k
dB
Notes:
6. Measured between AIN+ and AIN-
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6. ORDERING INFORMATION
Product Description Package Pb-Free Grade Temp Range
CS4461
Multi-bit A/D for
Class-D Real-time 24-TSSOP
PSR Feedback
YES
Commercial -10° to +70° C
Automotive -40° to +85° C
Evaluation board for
CDB44800 the CS44800/600
and the CS4461
-
-
-
-
Container
Rail
Tape & Reel
Rail
Tape & Reel
-
7. REVISION HISTORY
Release
Date
A1
May 2004
1st Advance Release
F1 September 2005 Updated ordering information
Changes
CS4461
Order #
CS4461-CZZ
CS4461-CZZR
CS4461-DZZ
CS4461-DZZR
CDB44800
Contacting Cirrus Logic Support
For all product questions and inquiries contact a Cirrus Logic Sales Representative.
To find the one nearest to you go to www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con-
sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent
does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP-
ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE
IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DE-
VICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDER-
STOOD TO BE FULLY AT THE CUSTOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED,
INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT
THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL
APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND
OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION
WITH THESE USES.
www.DataSheet4U.comCirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks
or service marks of their respective owners.
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