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AD7816AR-REEL PDF预览

AD7816AR-REEL

更新时间： 2024-02-03 02:27:59
品牌 Logo 应用领域
亚德诺 - ADI 传感器换能器温度传感器输出元件
页数 文件大小 规格书
20页 270K
描述
Single- and 4-Channel, 9 us, 10-Bit ADCs with On-Chip Temperature Sensor

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AD7816AR-REEL 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：SOIC-8针数：8
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.82
其他特性：THIS IS A TEMPERATURE MEASUREMENT ONLY DEVICE模拟集成电路 - 其他类型：ANALOG CIRCUIT
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
长度：4.9 mm湿度敏感等级：1
功能数量：1端子数量：8
最高工作温度：125 °C最低工作温度：-55 °C
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）：260认证状态：Not Qualified
座面最大高度：1.75 mm最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：2.7 V标称供电电压 (Vsup)：3 V
表面贴装：YES温度等级：MILITARY
端子面层：MATTE TIN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：40宽度：3.9 mm
Base Number Matches：1

AD7816AR-REEL 数据手册

 浏览型号AD7816AR-REEL的Datasheet PDF文件第6页浏览型号AD7816AR-REEL的Datasheet PDF文件第7页浏览型号AD7816AR-REEL的Datasheet PDF文件第8页浏览型号AD7816AR-REEL的Datasheet PDF文件第10页浏览型号AD7816AR-REEL的Datasheet PDF文件第11页浏览型号AD7816AR-REEL的Datasheet PDF文件第12页 
AD7816/AD7817/AD7818  
AD7816 AND AD7818 PIN FUNCTION DESCRIPTIONS  
Pin  
Mnemonic  
Description  
1
CONVST  
Logic Input Signal. The convert start signal initiates a 10-bit analog-to-digital conversion on the  
falling edge of the this signal. The falling edge of this signal places the track/hold in hold mode.  
The track/hold goes into track mode again at the end of the conversion. The state of the  
CONVST signal is checked at the end of a conversion. If it is logic low, the AD7816 and  
AD7818 will power down—see Operating Mode section of the data sheet.  
2
OTI  
Logic Output. The Overtemperature Indicator (OTI) is set logic low if the result of a conversion  
on Channel 0 (Temperature Sensor) is greater that an 8-bit word in the Overtemperature Register  
(OTR). The signal is reset at the end of a serial read operation, i.e., a rising RD/WR edge.  
3
GND  
VIN  
Analog and Digital Ground.  
4 (AD7818)  
Analog Input Channel. The input channel is single-ended with respect to GND. The input  
channel can convert voltage signals in the range 0 V to 2.5 V. The input channel is selected by  
writing to the Address Register of the AD7818—see Control Byte section.  
4 (AD7816)  
REFIN  
Reference Input. An external 2.5 V reference can be connected to the AD7816 at this pin. To  
enable the on-chip reference the REFIN pin should be tied to AGND. If an external reference is  
connected to the AD7816, the internal reference will shut down.  
5
6
7
VDD  
DIN/OUT  
SCLK  
Positive supply voltage, 2.7 V to 5.5 V.  
Logic Input and Output. Serial data is clocked in and out of the AD7816/AD7818 at this pin.  
Clock Input for the Serial Port. The serial clock is used to clock data into and out of the  
AD7816/AD7818. Data is clocked out on the falling edge and clocked in on the rising edge.  
8
RD/WR  
Logic Input. The read/write signal is used to indicate to the AD7816 and AD7818 whether  
the next data transfer operation is a read or a write. The RD/WR should be set logic high for a  
read operation and logic low for a write.  
PIN CONFIGURATIONS  
SOIC/MSOP (AD7816)  
Total Harmonic Distortion  
Total harmonic distortion (THD) is the ratio of the rms sum of  
harmonics to the fundamental. For the AD7891 it is defined as:  
V22 +V32 +V42 +V52 +V62  
RD/WR  
CONVST  
1
8
7
6
THD (dB)= 20 log  
AD7816  
TOP VIEW  
(Not to Scale)  
SCLK  
OTI  
2
3
V1  
D
GND  
IN/OUT  
where V1 is the rms amplitude of the fundamental and V2, V3,  
V4, V5, and V6 are the rms amplitudes of the second through the  
sixth harmonics.  
5
V
4
REF  
IN  
DD  
SOIC/MSOP (AD7818)  
Peak Harmonic or Spurious Noise  
Peak harmonic or spurious noise is defined as the ratio of the  
rms value of the next largest component in the ADC output  
spectrum (up to fS/2 and excluding dc) to the rms value of the  
fundamental. Normally, the value of this specification is deter-  
mined by the largest harmonic in the spectrum, but for parts  
where the harmonics are buried in the noise floor, it will be a  
noise peak.  
RD/WR  
CONVST  
1
8
AD7818  
TOP VIEW  
(Not to Scale)  
SCLK  
D
2
3
7
6
OTI  
GND  
IN/OUT  
V
4
5
V
DD  
IN  
Intermodulation Distortion  
TERMINOLOGY  
Signal-to-(Noise + Distortion) Ratio  
With inputs consisting of sine waves at two frequencies, fa and  
fb, any active device with nonlinearities will create distortion  
products at sum and difference frequencies of mfa Ϯ nfb where  
m, n = 0, 1, 2, 3, etc. Intermodulation terms are those for which  
neither m nor n are equal to zero. For example, the second  
order terms include (fa + fb) and (fa – fb), while the third order  
terms include (2fa + fb), (2fa – fb), (fa + 2fb) and (fa – 2fb).  
This is the measured ratio of signal-to-(noise + distortion) at the  
output of the A/D converter. The signal is the rms amplitude of  
the fundamental. Noise is the rms sum of all nonfundamental  
signals up to half the sampling frequency (fS/2), excluding dc.  
The ratio is dependent upon the number of quantization levels in  
the digitization process; the more levels, the smaller the quantiza-  
tion noise. The theoretical signal-to-(noise + distortion) ratio for  
an ideal N-bit converter with a sine wave input is given by:  
Signal-to-(Noise + Distortion) = (6.02 N + 1.76) dB  
Thus for a 10-bit converter, this is 62 dB.  
REV. C  
–9–  
1...6789101112...20

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