參數(shù)資料
型號： ADT7317ARQ
廠商： Analog Devices, Inc.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35
中文描述： SPI/I2C兼容，10位數(shù)字溫度傳感器和四DAC的電壓輸出12/10/8-Bit
文件頁數(shù)： 15/32頁
文件大?。?/td> 340K
代理商： ADT7317ARQ
ADT7316/7317/7318
–
15
–
REV. PrN
PRELIMINARY TECHNICAL DATA
internal and external temperature sensors as it cycles
through all possible measurement channels. The two tem-
perature channels are measured each time the part runs a
round robin sequence. In round robin mode the part is
continously measuring.
V
DD
MONITORING
The ADT7316/17/18 also has the capability of monitoring
it
’
s own power supply. The part measures the voltage on
it
’
s V
DD
pin to a resolution of 10 bits. The resultant value
is stored in two 8-bit registers, the two LSBs stored in
register address 03h and the eight MSBs are stored in
register address 06h. This allows the user to have the op-
tion of just doing a one byte read if 10-bit resolution is not
important. The measured result is compared with V
HIGH
and V
LOW
limits. If the V
DD
interrupt is not masked out
then any out of limit comparison generates a flag in Inter-
rupt Status 2 Register and one or more out-of-limit results
will cause the INTERRUPT output to pull either high or
low depending on the output polarity setting.
Measuring the voltage on the V
DD
pin is regarded as moni-
toring a channel. Therefore, along with the Internal and
External temperature sensors the V
DD
voltage makes up
the third and final monitoring channel. You can select the
V
DD
channel for single channel measurement by setting Bit
C4 = 1 and setting Bit 0 to Bit 2 to all 0
’
s in Control
Configuration 2 register.
When measuring the V
DD
value the reference for the ADC
is sourced from the Internal Reference. Table 2 shows the
data format. As the max V
CC
voltage measurable is 7 V,
internal scaling is performed on the V
CC
voltage to match
the 2.25V internal reference value. Below is an example of
how the transfer function works.
V
DD
= 5 V
ADC Reference = 2.25 V
1 LSB = ADC Reference / 2^10 = 2.25 / 1024 =
2.197mV
Scale Factor = Fullscale V
CC
/ ADC Reference = 7 / 2.25
= 3.11
Conversion Result = V
DD
/ ((7/Scale Factor) x LSB size)
= 5 / (3.11 x 2.197mV)
= 2DBh
TABLE 2. V
DD
Data Format, V
REF
= 2.25V
V
DD
Value
Digital Output
Binary
Hex
2.5 V
01 0110 1110
16E
3 V
01 1011 0111
1B7
3.5 V
10 0000 0000
200
4 V
10 0100 1001
249
4.5 V
10 1001 0010
292
5 V
10 1101 1011
2DB
5.5 V
11 0010 0100
324
6 V
11 0110 1101
36D
6.5 V
11 1011 0110
3B6
7 V
11 1111 1111
3FF
ON-CHIP REFERENCE
The ADT7316/17/18 has an on-chip 1.2 V band-gap
refernece which is gained up by a switched capacitor am-
plifier to give an output of 2.25 V. The amplifier is only
powered up at the start of the conversion phase and is
powered down at the end of conversion. On power-up the
default mode is to have the internal reference selected as
the reference for the DAC and ADC. The internal refer-
ence is always used when measuring the internal and ex-
ternal temperature sensors.
ROUND ROBIN MEASUREMENT
On power-up the ADT7316/17/18 goes into Round Robin
mode but monitoring is disabled. Setting Bit C0 of Con-
figuration Register 1 to a 1 enables conversions. It se-
quences through the three channels of V
DD
, Internal
temperature sensor and External temperature sensor and
takes a measurement from each. At intervals of tbd ms
another measurement cycle is performed on all three chan-
nels. This method of taking a measurement on all three
channels in one cycle is called Round Robin. Setting Bit 4
of Control Configuration 2 (address 19h) disables the
Round Robin mode and in turn sets up the single channel
mode. The single channel mode is where only one chan-
nel, eg. Internal temperature sensor, is measured in each
conversion cycle.
The time taken to monitor all channels will normally not
be of interest, as the most recently measured value can be
read at any time.
For applications where the Round Robin time is impor-
tant, it can be easily calculated.
As mentioned previously a conversion on each temperature
channel takes 25 us and on the V
DD
channel it takes 15 us.
Each channel is measured 16 times and internally aver-
aged to reduce noise.
The total cycle time for voltage and temperature channels
is therefore nominally :
(2 x 16 x 25) + (16 x 15) = 1.04 ms
SINGLE CHANNEL MEASUREMENT
Setting C4 of Control Configuration 2 register enables the
single channel mode and allows the ADT7316/17/18 to
focus on one channel only. A channel is selected by writ-
ing to Bits 0:2 in register Control Configuration 2 regis-
ter. For example, to select the V
DD
channel for monitoring
write to the Control Configuration 2 register and set C4
to 1 (if not done so already), then write all 0
’
s to bits 0 to
2 . All subsequent conversions will be done on the V
DD
channel only. To change the channel selection to the In-
ternal temperature channel, write to the Control Configu-
ration 2 register and set C0 = 1. When measuring in
single channel mode there is a time delay of TBD us be-
tween each measurement. A measurement is also initiated
after every read or write operation.
相關PDF資料
PDF描述
ADT7318 Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35
ADT7318ARQ Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35
ADT7411 SPI/I2C compatible，10-bit digital temperature sensor and 8-channel ADC
ADT7411ARQ SPI/I2C Compatible, 10-Bit Digital Temperature Sensor and 8-Channel ADC
ADT7411ARQ-REEL Circular Connector; No. of Contacts:26; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:17-26
相關代理商/技術參數(shù)
參數(shù)描述
ADT7317ARQ-REEL 制造商:Analog Devices 功能描述:Digital Temperature Sensor 16-Pin QSOP T/R 制造商:Rochester Electronics LLC 功能描述:DTS, 10-BIT QUAD VOLTAGE OUTPUT DAC I.C. - Tape and Reel
ADT7317ARQ-REEL7 制造商:Analog Devices 功能描述:Digital Temperature Sensor 16-Pin QSOP T/R 制造商:Rochester Electronics LLC 功能描述:DTS, 10-BIT QUAD VOLTAGE OUTPUT DAC I.C. - Tape and Reel
ADT7317ARQZ 功能描述:IC SENSOR TEMP QUAD DAC 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7317ARQZ-REEL 功能描述:IC SENSOR TEMP QUAD DAC 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
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