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| 型号： | AD7414ARM-2REEL7 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2Cel, SQUARE, SURFACE MOUNT |
| 封装： | MICRO, SOIC-8 |
| 文件页数： | 10/12页 |
| 文件大小： | 182K |
| 代理商： | AD7414ARM-2REEL7 |
AD7414
–7–
REV. PrB
Preliminary Technical Data
PRELIMINAR
Y
TECHNICAL
DA
TA
CONFIGURATION REGISTER (ADDRESS 01H)
The Configuration Register is an 8-bit read/write register
that is used to set the operating modes of the AD7414.
Only four of the MSBs are used (D7 to D4) to set the
operating modes, see Table 7. D0 to D3 are used for fac-
tory settings and must have zeros written to them during
normal operation.
Table 6.
Configuration Register
D7
D6
D5
D4
D3
D2
D1
D0
PD
FLTR
ALERT
TEST MODE
EN
POLARITY
0 *
1 *
0 *
0’s*
*Default settings at Power-up.
Table 7.
Configuration Register Settings
D 7
Full Power-down if = 1
D 6
Bypass SDA & SCL filtering if = 0
D 5
Disable ALERT if = 1
D 4
ALERT is active low if D4 = 0,
ALERT is active high if D4 = 1
TEMPERATURE VALUE REGISTER
The Temperature Value Register is a 10-bit read-only
register which stores the temperature reading from the
ADC in twos complement format. Two reads are neces-
sary to read data from this register. Table 8 showes the
contents of the first byte to be read while Table 9 shows
the contents of the second byte to be read. D3 to D5 of
the second byte are used as flag bits and are obtained from
other internal registers. They function as folows :-
ALERT _Flag : the state of this bit is same as that of the
ALERT pin.
THIGH_Flag : this flag is set to a 1 when the temperature
measured goes above the THIGH limit. It is
reset when the 2nd temperature byte (Table
9) is read. If the temperature is still greater
than the THIGH limit after the read operation,
then the flag will be set again.
TLOW_Flag : this flag is set to a 1 when the temperature
measured goes below the TLOW limit. It is
reset when the 2nd temperature byte (Table
9) is read. If the temperature is still less than
the TLOW limit after the read operation, then
the flag will be set again.
The full theoretical span of the ADC is 255
oC, but in
practice the temperature measurement range is limited to
the operating range of the device, -55oC to +125oC for A-
grade and -55
oC to +135oC for S-grade.
Table 8.
Temperature Value Register (First Read)
D7
D6
D5
D4
D3
D2
D1
D0
M S B B8
B7
B6
B5
B4
B3
B2
Table 9.
Temperature Value Register (Second Read)
D7
D6
D5
D4
D3
D2
D1
D0
B 1
L S B
ALERT
THIGH
TLOW
00
0
Flag
THIGH REGISTER
The THIGH Register is an 8-bit read/write register which
stores the upper limit that will activate the ALERT out-
put. Therefore if the value in the Temperature Value Reg-
ister is greater than the value in the THIGH Register, then
the ALERT pin is activated (that is if ALERT is enabled
in the Configuration Register). As it is an 8-bit register
the temperature resolution is 1
oC.
Table 10.
THIGH Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
TLOW REGISTER
The TLOW Register is an 8-bit read/write register which
stores the lower limit that will deactivate the ALERT out-
put. Therefore if the value in the Temperature Value Reg-
ister is less than the value in the TLOW Register, then the
ALERT pin is deactivated (that is if ALERT is enabled in
the Configuration Register). As it is an 8-bit register the
temperature resolution is 1
oC.
Table 11.
TLOW Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
AD7414 SERIAL INTERFACE
Control of the AD7414 is carried out via the I
2C-compat-
ible serial bus. The AD7414 is connected to this bus as a
slave device, under the control of a master device, e.g. the
processor.
SERIAL BUS ADDRESS
Like all I
2C-compatible devices, the AD7414 has a 7-bit
serial address. The four MSBs of this address for the
AD7414 are set to 1001. The AD7414 comes in four ver-
sions, the AD7414-0, AD7414-1, AD7414-2 and the
AD7414-3. The first two versions have three different I
2C
addresses available which are selected by either tying the
AS pin to GND, to VDD or letting the pin float (see
Table 1). By giving different addresses for the four ver-
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相关代理商/技术参数 |
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| AD7414ARMZ-0 | 功能描述:IC SENSOR TEMP 10BIT DGTL 8MSOP 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 |
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| AD7414ARMZ-0REEL7 | 功能描述:IC SENSOR TEMP 10BIT DGTL 8MSOP 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 |
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