參數(shù)資料
型號: CS4461-CZZR
廠商: Cirrus Logic Inc
文件頁數(shù): 1/11頁
文件大?。?/td> 0K
描述: IC ADC PSR FEEDBACK 24-TSSOP
標準包裝: 2,000
采樣率(每秒): 7.5M
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 235mW
電壓電源: 模擬和數(shù)字
工作溫度: -10°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 24-TSSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 1 個差分,單極
Copyright
Cirrus Logic, Inc. 2005
(All Rights Reserved)
Multi-Bit A/D for Class-D Real-Time PSR Feedback
Features
Advanced Multi-bit Delta-Sigma Architecture
Real-time Feedback of Power Supply
Conditions (AC and DC)
Filterless Digital Output Resulting in Very Low
Signal Delay
135 mW Power Consumption
Supports Logic Levels Between 3.3 V and
5.0 V
Differential Analog Architecture
Modulator Overflow Detection
Interfaces Directly to the CS44800/CS44600
Class-D PWM Modulator
Multi-bit Conversion at up to 7.5 MHz
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
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