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AD1870JR PDF预览

AD1870JR

更新时间: 2024-01-02 09:44:08
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 274K
描述
Single-Supply 16-Bit Stereo ADC

AD1870JR 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SOIC包装说明:PLASTIC, SOIC-28
针数:28Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.91最大模拟输入电压:3.74 V
最小模拟输入电压:0.76 V转换器类型:ADC, DELTA-SIGMA
JESD-30 代码:R-PDSO-G28JESD-609代码:e0
长度:17.9 mm模拟输入通道数量:2
位数:16功能数量:1
端子数量:28最高工作温度:85 °C
最低工作温度:-40 °C输出位码:2'S COMPLEMENT BINARY
输出格式:SERIAL封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:2.65 mm
标称供电电压:5 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子面层:TIN LEAD端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:7.5 mm

AD1870JR 数据手册

 浏览型号AD1870JR的Datasheet PDF文件第2页浏览型号AD1870JR的Datasheet PDF文件第3页浏览型号AD1870JR的Datasheet PDF文件第4页浏览型号AD1870JR的Datasheet PDF文件第5页浏览型号AD1870JR的Datasheet PDF文件第6页浏览型号AD1870JR的Datasheet PDF文件第7页 
Single-Supply  
a
16-Bit -Stereo ADC  
AD1870*  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Single 5 V Power Supply  
Single-Ended Dual-Channel Analog Inputs  
92 dB (Typ) Dynamic Range  
90 dB (Typ) S/(THD + N)  
0.006 dB Decimator Passband Ripple  
Fourth-Order, 64
؋
 Oversampling -Modulator  
Three-Stage, Linear-Phase Decimator  
256 
؋
 fS or 384 
؋
 fS Input Clock  
Less than 100 W (Typ) Power-Down Mode  
Input Overrange Indication  
CLOCK  
DIVIDER  
LRCK  
WCLK  
BCLK  
1
2
28 CLKIN  
SERIAL OUTPUT  
INTERFACE  
27 TAG  
26  
25 DV  
3
SOUT  
THREE-STAGE FIR  
DECIMATION  
FILTER  
THREE-STAGE FIR  
DECIMATION  
FILTER  
4
2
DV  
1
DD  
DGND2  
DD  
5
DGND1  
RDEDGE  
S/M  
24  
6
23 RESET  
22 MSBDLY  
21 RLJUST  
On-Chip Voltage Reference  
Flexible Serial Output Interface  
28-Lead SOIC Package  
DAC  
DAC  
DAC  
DAC  
7
8
384/256  
APPLICATIONS  
9
20  
AV  
DD  
AGND  
Consumer Digital Audio Receivers  
Digital Audio Recorders, Including Portables  
CD-R, DCC, MD, and DAT  
Multimedia and Consumer Electronics Equipment  
Sampling Music Synthesizers  
10  
11  
12  
V
R
V
L
19  
18  
17  
16  
15  
IN  
IN  
CAPR1  
CAPR2  
AGNDR  
CAPL1  
CAPL2  
AGNDL  
SINGLE-TO-  
DIFFERENTIAL INPUT DIFFERENTIAL INPUT  
CONVERTER CONVERTER  
SINGLE-TO-  
13  
14  
VOLTAGE  
REFERENCE  
V
R
V
L
REF  
REF  
AD1870  
PRODUCT OVERVIEW  
The AD1870 is a stereo, 16-bit oversampling ADC based on  
sigma-delta (-) technology intended primarily for digital  
audio bandwidth applications requiring a single 5 V power supply.  
Each single-ended channel consists of a fourth-order one-bit  
noise shaping modulator and a digital decimation filter. An on-  
chip voltage reference, stable over temperature and time, defines  
the full-scale range for both channels. Digital output data from  
both channels are time-multiplexed to a single, flexible serial  
interface. The AD1870 accepts a 256 × fS or a 384 × fS input  
clock (fS is the sampling frequency) and operates in both serial  
port “master” and “slave” modes. In slave mode, all clocks must  
be externally derived from a common source.  
one-bit comparator’s quantization noise out of the audio pass-  
band. The high order of the modulator randomizes the modulator  
output, reducing idle tones in the AD1870 to very low levels.  
Because its modulator is single-bit, the AD1870 is inherently  
monotonic and has no mechanism for producing differential  
linearity errors.  
The input section of the AD1870 uses autocalibration to correct  
any dc offset voltage present in the circuit, provided that the inputs  
are ac-coupled. The single-ended dc input voltage can swing  
between 0.7 V and 3.8 V typically. The AD1870 antialias input  
circuit requires four external 470 pF NPO ceramic chip filter  
capacitors, two for each channel. No active electronics are needed.  
Decoupling capacitors for the supply and reference pins are  
also required.  
Input signals are sampled at 64 × fS onto internally buffered  
switched-capacitors, eliminating external sample-and-hold ampli-  
fiers and minimizing the requirements for antialias filtering at the  
input. With simplified antialiasing, linear phase can be preserved  
across the passband. The on-chip single-ended to differential signal  
converters save the board designer from having to provide them  
externally. The AD1870’s internal differential architecture provides  
increased dynamic range and excellent power supply rejection  
characteristics. The AD1870’s proprietary fourth-order differen-  
tial switched-capacitor -modulator architecture shapes the  
The dual digital decimation filters are triple-stage, finite impulse  
response filters for effectively removing the modulator’s high  
frequency quantization noise and reducing the 64 × fS single-bit  
output data rate to an fS word rate. They provide linear phase  
and a narrow transition band that properly digitizes 20 kHz signals  
at a 44.1 kHz sampling frequency. Passband ripple is less than  
0.006 dB, and stop band attenuation exceeds 90 dB.  
*Protected by U.S. Patent Numbers 5055843, 5126653; others pending.  
(Continued on Page 7)  
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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
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  
Fax: 781/326-8703  
www.analog.com  
© Analog Devices, Inc., 2001  

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