參數(shù)資料
型號: EVAL-AD1974AZ
廠商: Analog Devices Inc
文件頁數(shù): 1/24頁
文件大?。?/td> 0K
描述: BOARD EVAL FOR AD1974
標(biāo)準(zhǔn)包裝: 1
ADC 的數(shù)量: 4
位數(shù): 24
采樣率(每秒): 192k
數(shù)據(jù)接口: 串行
輸入范圍: 1.9 Vrms
工作溫度: -40°C ~ 125°C
已用 IC / 零件: AD1974
已供物品:
4 ADC with PLL,
192 kHz, 24-Bit ADC
Data Sheet
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
2007–2013 Analog Devices, Inc. All rights reserved.
FEATURES
Phase-locked loop generated or direct master clock
Low EMI design
107 dB dynamic range and SNR
94 dB THD + N
Single 3.3 V supply
Tolerance for 5 V logic inputs
Supports 24 bits and 8 kHz to 192 kHz sample rates
Differential ADC input
SPI-controllable for flexibility
Software-controllable clickless mute
Software power-down
Right justified, left justified, I2S, and TDM modes
Master and slave modes up to 16-channel input/output
Available in a 48-lead LQFP
Qualified for automotive applications
APPLICATIONS
Automotive audio systems
Home Theater Systems
Set-top boxes
Digital audio effects processors
GENERAL DESCRIPTION
The AD1974 is a high performance, single-chip ADC that pro-
vides four analog-to-digital converters (ADCs) with differential
inputs using the Analog Devices, Inc. patented multibit sigma-
delta (Σ-Δ) architecture. An SPI port is included, allowing a
microcontroller to enable mutes and adjust many other
parameters. The AD1974 operates from 3.3 V digital and analog
supplies. The AD1974 is available in a single-ended output
48-lead LQFP.
The AD1974 is designed for low EMI. This consideration is
apparent in both the system and circuit design architectures.
By using the on-board phase-locked loop (PLL) to derive the
master clock from the LR clock or from an external crystal,
the AD1974 eliminates the need for a separate high frequency
master clock and can also be used with a suppressed bit clock.
The ADCs are designed using the latest continuous time archi-
tectures from Analog Devices to further minimize EMI. By
using 3.3 V supplies, power consumption is minimized, further
reducing emissions.
FUNCTIONAL BLOCK DIAGRAM
QUAD
DEC
FILTER
48kHz/
96kHz/192kHz
SERIAL DATA PORT
DIGITAL AUDIO
INPUT/OUTPUT
PRECISION
VOLTAGE
REFERENCE
12.48MHz
TIMING MANAGEMENT
AND CONTROL
(CLOCK AND PLL)
CONTROL PORT
SPI
CONTROL DATA
INPUT/OUTPUT
AD1974
ADC
ANALOG
AUDIO
INPUTS
SDATA
OUT
CLOCKS
06614-
001
Figure 1.
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