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AD1871YRS-REEL Datasheet

  • AD1871YRS-REEL

  • Stereo Audio, 24-Bit, 96 kHz, Multibit ADC

  • 673.54KB

  • 28頁

  • AD

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a
FEATURES
5.0 V Stereo Audio ADC
with 3.3 V Tolerant Digital Interface
Supports 96 kHz Sample Rates
Supports 16-/20-/24-Bit Word Lengths
Multibit Sigma-Delta Modulators with
鈥淧erfect Differential Linearity Restoration鈥?for
Reduced Idle Tones and Noise Floor
105 dB (Typ) Dynamic Range
Supports 256/512 and 768 f
S
Master Clocks
Flexible Serial Data Port
Allows Right-Justified, Left-Justified, I
2
S Compatible
and DSP Serial Port Modes
Cascadable (up to Four Devices) from a Single DSP
SPORT
Device Control via SPI Compatible Serial Port or
Optional Control Pins
On-Chip Reference
28-Lead SSOP Package
APPLICATIONS
Professional Audio
Mixing Consoles
Musical Instruments
Digital Audio Recorders, Including
CD-R, MD, DVD-R, DAT, HDD
Home Theater Systems
Automotive Audio Systems
Multimedia
Stereo Audio, 24-Bit,
96 kHz, Multibit - ADC
AD1871
PRODUCT OVERVIEW
The AD1871 is a stereo audio ADC intended for digital audio
applications requiring high performance analog-to-digital
conversion. It features two 24-bit conversion channels each
with programmable gain amplifier (PGA), multibit sigma-delta
modulator, and decimation filters. Each channel provides 105 db
of dynamic range, making the AD1871 suitable for applications
such as digital audio recorders and mixing consoles.
Each of the AD1871鈥檚 input channels (left and right) can be
configured as either differential or single-ended (two inputs
muxed with internal single-ended-to-differential conversion).
The input PGA features a gain range of 0 dB to 12 dB in steps
of 3 dB. The
危-鈭?/div>
modulator features a proprietary multibit
architecture that realizes optimum performance over an audio
bandwidth with standard audio sampling rates of 32 kHz up to
96 kHz. The decimation filter response features very low pass-
band ripple and excellent stop-band attenuation.
The AD1871鈥檚 audio data interface supports all common interface
formats such as I
2
S, left-justified, right-justified as well as other
modes that allow for convenient connection to general-purpose
digital signal processors (DSPs). The AD1871 also features an
SPI compatible serial control port that allows for convenient
control of device parameters and functionality such as sample
word-width, PGA settings, interface modes, and so on.
The AD1871 operates from a single 5 V power supply鈥攚ith
an optional digital interfacing capability of 3.3 V. It is housed in
a 28-lead SSOP package and is characterized for operation
over the temperature range 鈥?0擄C to +105擄C.
FUNCTIONAL BLOCK DIAGRAM
CAPLN CAPLP
AVDD
DVDD
ODVDD
CASC
VINLP
LRCLK
ANALOG
INPUT
BUFFER
MULTIBIT
-
MODULATOR
DECIMATOR
DATA
PORT
BCLK
DOUT
DIN
VINLN
VREF
AD1871
FILTER
ENGINE
RESET
CLOCK
DIVIDER
MCLK
VINRP
CLATCH/(M/S)
ANALOG
INPUT
BUFFER
MULTIBIT
-
MODULATOR
DECIMATOR
SPI
PORT
CCLK/(256/512)
CIN/(DF1)
COUT/(DF0)
XCTRL
VINRN
CAPRN CAPRP
AGND
DGND
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 2002

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