- 您现在的位置：买卖IC网 > PDF目录10055 > AD7876CR (Analog Devices Inc)IC ADC 12BIT SAMPLING 10V 24SOIC PDF资料下载
参数资料
| 型号： | AD7876CR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SAMPLING 10V 24SOIC |
| 产品变化通告： | Conversion Time Change |
| 标准包装： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 100k |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 95mW |
| 电压电源： | 双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，双极 |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
AD7870/AD7875/AD7876
Rev. C | Page 16 of
28
CS
TRACK-AND-HOLD
GOES INTO HOLD
TRACK-AND-HOLD RETURNS TO TRACK
AND ACQUISITION TIME BEGINS
THREE-STATE
VALID
DATA
DB11 TO DB0
RD
BUSY
DATA
t15
t17
t7
07
73
0-
01
6
t16
tCONVERT
t18
Figure 16. Mode 2 Timing Diagram, 12-Bit Parallel Read
CS
RD
BUSY
SSTRB2
DATA
SCLK3
TRACK-AND-HOLD RETURNS TO TRACK
AND ACQUISITION TIME BEGINS
TRACK-AND-HOLD
GOES INTO HOLD
THREE-STATE
LEADING
ZEROS
VALID
DATA
DB7 TO DB0
VALID
DATA
DB11 TO DB8
HBEN1
SDATA2
1TIMES
t15, t16, AND t20 ARE THE SAME FOR A HIGH BYTE READ AS FOR A LOW BYTE READ.
2EXTERNAL 4.7k PULL-UP RESISTOR.
3EXTERNAL 2k PULL-UP RESISTOR;
CONTINUOUS SCLK (DASHED LINE) WHEN 12/8/CLK = –5V;
NONCONTINUOUS WHEN 12/8/CLK = 0V.
DB11 DB10
SERIAL DATA
DB0
t8
t2
t18
t20
t7
t6
t7
t6
t17
t11
t10
t16
t15
t19
tCONVERT
t13
t14
t12
0
77
30
-01
7
Figure 17. Mode 2 Timing Diagram, Byte or Serial Read
The Mode 2 timing diagram for byte and serial data is shown in
Figure 17. For a two-byte data read, the lower byte (DB0 – DB7)
has to be accessed first since HBEN must be low to start conver-
sion. The ADC behaves like slow memory for this first read,
but the second read to access the upper byte of data is a normal
read. Operation of the serial functions is identical between
Mode 1 and Mode 2. The timing diagram of Figure 17 shows
both a noncontinuously and a continuously running SCLK
(dashed line).
DYNAMIC SPECIFICATIONS
The AD7870 and AD7875 are specified and 100% tested for
dynamic performance specifications as well as traditional dc
specifications such as integral and differential nonlinearity.
Although the AD7876 is not production tested for ac
parameters, its dynamic performance is similar to the AD7870
and AD7875. The ac specifications are required for signal
processing applications such as speech recognition, spectrum
analysis and high speed modems. These applications require
information on the ADC’s effect on the spectral content of the
input signal. Thus, the parameters for which the AD7870 and
AD7875 are specified include SNR, harmonic distortion,
intermodulation distortion and peak harmonics. These terms
are discussed in more detail in the following sections.
Signal-to-Noise Ratio (SNR)
SNR is the measured signal-to-noise ratio at the output of the
ADC. The signal is the rms magnitude of the fundamental.
Noise is the rms sum of all the nonfundamental signals up
to half the sampling frequency (FS/2) excluding dc. SNR is
dependent upon the number of quantization levels used in
the digitization process; the more levels, the smaller the
quantization noise. The theoretical signal-to-noise ratio for
a sine wave input is given by
SNR = (6.02N + 1.76) dB
(1)
where N is the number of bits. Thus for an ideal 12-bit
converter, SNR = 74 dB.
Note that a sine wave signal is of very low distortion to the VIN
input which is sampled at a 100 kHz sampling rate. A fast
相关PDF资料 |
PDF描述 |
|---|---|
| VE-264-MX-F2 | CONVERTER MOD DC/DC 48V 75W |
| MS27474E20A41P | CONN RCPT 41POS JAM NUT W/PINS |
| AD7572JN12 | IC ADC 12BIT HS LC2MOS 24-DIP |
| VE-264-MX-F1 | CONVERTER MOD DC/DC 48V 75W |
| MS3101R12-5P | CONN RCPT 1POS PANEL MNT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7876CR-REEL | 功能描述:IC ADC 12BIT SAMPLING 10V 24SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7876CRZ | 功能描述:IC ADC 12BIT SAMPLING 10V 24SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7876CRZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:LC2MOS Complete, 12-Bit, 100 kHz, Sampling ADCs |
| AD7876TQ | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Parallel/Serial 24-Pin CDIP 制造商:Analog Devices 功能描述:ADC SGL SAR 100KSPS 12-BIT PARALLEL/SERL 24CDIP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:12-BIT SAMPLING ADC IC - Bulk 制造商:Analog Devices 功能描述:IC ADC 12BIT SAMPLING 10V 24CDIP 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC 12-BIT SAMPLING ADC IC 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| AD7876TQ/883B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 12-Bit |
发布紧急采购，3分钟左右您将得到回复。