Cirrus-logic CS4461 Uživatelský manuál

Procházejte online nebo si stáhněte Uživatelský manuál pro Hardware Cirrus-logic CS4461. Cirrus Logic CS4461 User Manual Uživatelská příručka

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 11
  • Tabulka s obsahem
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 0
Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
http://www.cirrus.com
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.
Voltage Reference
REFGND
AIN-
AIN+
FILT+
PSR_DATA
PSR_SYNC
5.0 V
(VA)
GND
VQ
PSR_MCLK
S/H
+
-
LP Filter
∆Σ
DAC
Output Data
Formatting
3.3 V to 5.0 V
(VDP)
PSR_EN
OVERFLOW
PSR_RESET
SEPTEMBER '05
DS650F1
CS4461
Zobrazit stránku 0
1 2 3 4 5 6 ... 10 11

Shrnutí obsahu

Strany 1 - General Description

Copyright © Cirrus Logic, Inc. 2005(All Rights Reserved)http://www.cirrus.comMulti-Bit A/D for Class-D Real-Time PSR FeedbackFeaturesz Advanced Multi-

Strany 2 - LIST OF FIGURES

10 DS650F1CS44615. PACKAGE DIMENSIONS Notes:1. “D” and “E1” are reference datums and do not included mold flash or protrusions, but do include moldmi

Strany 3 - ABSOLUTE MAXIMUM RATINGS

DS650F1 11CS44616. ORDERING INFORMATION7. REVISION HISTORYProduct Description Package Pb-Free Grade Temp Range Container Order #CS4461Multi-bit A/D fo

Strany 4 - DC ELECTRICAL CHARACTERISTICS

2 DS650F1CS4461TABLE OF CONTENTS1. CHARACTERISTICS AND SPECIFICATIONS ...

Strany 5 - ANALOG CHARACTERISTICS

DS650F1 3CS44611. CHARACTERISTICS AND SPECIFICATIONS(All Min/Max characteristics and specifications are guaranteed over the Specified Operating Condit

Strany 6 - 2. PIN DESCRIPTIONS

4 DS650F1CS4461DC ELECTRICAL CHARACTERISTICS(GND = 0 V, all voltages with respect to ground. PSR_MCLK=12.288 MHz)Notes:4. Power Down Mod

Strany 7 - 3. TYPICAL CONNECTION DIAGRAM

DS650F1 5CS4461ANALOG CHARACTERISTICS(Test conditions (unless otherwise specified): Input test signal is a 1 kHz sine wave; measurement bandwidth is 1

Strany 8 - 4. APPLICATIONS

6 DS650F1CS44612. PIN DESCRIPTIONS Pin Name # Pin DescriprionVDP681314Digital Logic Power (Input) – Digital core and input/output power supply. Nom

Strany 9 - 4.4 Overflow Detection

DS650F1 7CS44613. TYPICAL CONNECTION DIAGRAMCS4461AIN+AIN-REFGND+5.0 V+3.3 V or +5.0 V0.1 µF0.1 µFPWMModulatorwith PSRProcessingPSR_MCLKPSR_SYNCPSR_DA

Strany 10 - 5. PACKAGE DIMENSIONS

8 DS650F1CS44614. APPLICATIONS4.1 Digital ConnectionsPSR_MCLK provides the system clock for the CS4461. PSR_SYNC and PSR_DATA provide the output ofthe

Strany 11 - 7. REVISION HISTORY

DS650F1 9CS44614.3 Power-Up SequenceReliable power-up can be accomplished by keeping the device in reset until the power supplies and clocksare stable

Komentáře k této Příručce

Žádné komentáře