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| 型号： | AD7817ARUZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/20页 |
| 文件大小： | 279K |
| 描述： | IC ADC 10BIT W/TEMP SNSR 16TSSOP |
| 标准包装： | 1,000 |
| 功能： | 温度监控系统（传感器） |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 125°C |
| 精确度： | ±2°C |
| 拓扑： | ADC，多路复用器，寄存器库 |
| 输出类型： | MICROWIRE?，QSPI?，SPI? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 带卷 (TR) |
REV. C
AD7816/AD7817/AD7818
15
THR
HP T kHz
10
1
0.01
0
80
10
0.1
20
30
40
50
60
70
Figure 19. Power vs. Throughput Rate
AD7817 SERIAL INTERFACE
The serial interface on the AD7817 is a 5-wire interface with
read and write capabilities, with data being read from the output
register via the D
OUT
line and data being written to the control
register via the D
IN
line. The part operates in a slave mode and
requires an externally applied serial clock to the SCLK input to
access data from the data register or write to the control byte.
The RD/WR line is used to determine whether data is being
written to or read from the AD7817. When data is being written
to the AD7817, the RD/WR line is set logic low and when data
is being read from the part the line is set logic high (see Figure
20). The serial interface on the AD7817 is designed to allow the
part to be interfaced to systems that provide a serial clock that is
synchronized to the serial data, such as the 80C51, 87C51,
68HC11, 68HC05, and PIC16Cxx microcontrollers.
DB7 DB0
DB7(DB9) DB0
D
OUT
CONVST
SCLK
BUSY
CS
RD/WR
D
IN
OTI
t
15
t
16
t
3
t
POWER-UP
t
1
Figure 17. Mode 2 Operation
POWER VS. THROUGHPUT
Superior power performance can be achieved by using the Auto-
matic Power-Down (Mode 2) at the end of a conversion (see
Operating Modes section of this data sheet).
t
POWER-UP
t
CONVERT
CONVST
BUSY
2s
8s
t
CYCLE
100s @ 10kSPS
Figure 18. Automatic Power-Down
Figure 18 shows how the Automatic Power-Down is imple-
mented to achieve the optimum power performance from the
AD7816, AD7817, and AD7818. The devices are operated in
Mode 2 and the duration of CONVST pulse is set to be equal to
the power-up time (2 祍). As the throughput rate of the device is
reduced the device remains in its power-down state longer, and
the average power consumption over time drops accordingly.
For example, if the AD7817 is operated in a continuous sam-
pling mode with a throughput rate of 10 kSPS, the power con-
sumption is calculated as follows. The power dissipation during
normal operation is 4.8 mW, V
DD
= 3 V. If the power up time is
2 祍 and the conversion time is 9 祍, the AD7817 can be said to
dissipate 4.8 mW typically for 11 祍 (worst case) during each
conversion cycle. If the throughput rate is 10 kSPS, the cycle
time is 100 祍 and the power dissipated while powered up dur-
ing each cycle is (11/100) ?(4.8 mW) = 528 礧 typ. Power
dissipated while powered down during each cycle is (89/100) ?/DIV>
(3 V ?2 礎) = 5.34 礧 typ. Overall power dissipated is 528 礧
+ 5.34 礧 = 533 礧.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7817ARZ | 功能描述:IC ADC 10BIT 4CH W/TEMP 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:3,000 系列:- 功能:温度开关 传感器类型:内部 感应温度:85°C 分界点 精确度:±6°C（最小值） 拓扑:ADC（三角积分型），比较器，寄存器库 输出类型:开路漏极 输出警报:是 输出风扇:是 电源电压:2.7 V ~ 5.5 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:带卷 (TR) 其它名称:ADT6501SRJZP085RL7-ND |
| AD7817ARZ-REEL | 功能描述:IC ADC 10BIT W/TEMP SNSR 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:2,500 系列:SilentSense™ 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-55°C ~ 125°C，外部传感器 精确度:±2°C 本地（最大），±3°C 远程（最大） 拓扑:ADC（三角积分型），比较器，寄存器库 输出类型:I²C?/SMBus? 输出警报:是 输出风扇:是 电源电压:2.7 V ~ 5.5 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MSOP 包装:带卷 (TR) 其它名称:MIC284-2BMMTRMIC284-2BMMTR-ND |
| AD7817ARZ-REEL7 | 功能描述:IC ADC 10BIT W/TEMP SNSR 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:2,500 系列:SilentSense™ 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-55°C ~ 125°C，外部传感器 精确度:±2°C 本地（最大），±3°C 远程（最大） 拓扑:ADC（三角积分型），比较器，寄存器库 输出类型:I²C?/SMBus? 输出警报:是 输出风扇:是 电源电压:2.7 V ~ 5.5 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MSOP 包装:带卷 (TR) 其它名称:MIC284-2BMMTRMIC284-2BMMTR-ND |
| AD7817BR | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 10-bit Serial 16-Pin SOIC N 制造商:Rochester Electronics LLC 功能描述:4 CH. ADC W/ON-CHIP TEMP SENSOR I.C. - Bulk |
| AD7817BR-REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 10-bit Serial 16-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:4 CH. ADC W/ON-CHIP TEMP SENSOR I.C. - Tape and Reel |
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