ADT7461A
http://onsemi.com
9
for both internal and external results. Temperature values are
offset by 64癈 in the offset binary data format. Examples of
temperatures in both data formats are shown in Table 8.
Table 8. TEMPERATURE DATA FORMAT
(TEMPERATURE HIGH BYTE)
Temperature
Binary
Offset Binary
(Note 1)
55癈
0 000 0000
(Note 2)
0 000 1001
0癈
0 000 0000
0 100 0000
+1癈
0 000 0001
0 100 0001
+10癈
0 000 1010
0 100 1010
+25癈
0 001 1001
0 101 1001
+50癈
0 011 0010
0 111 0010
+75癈
0 100 1011
1 000 1011
+100癈
0 110 0100
1 010 0100
+125癈
0 111 1101
1 011 1101
+127癈
0 111 1111
1 011 1111
+150癈
0 111 1111
(Note 3)
1 101 0110
1. Offset binary scale temperature values are offset by 64癈.
2. Binary scale temperature measurement returns 0癈 for all
temperatures < 0癈.
3. Binary scale temperature measurement returns 127癈 for all
temperatures > 127癈.
The user can switch between measurement ranges at any
time. Switching the range likewise switches the data format.
The next temperature result following the switching is
reported back to the register in the new format. However, the
contents of the limit registers do not change. It is up to the
user to ensure that when the data format changes, the limit
registers are reprogrammed as necessary. More information
on this is found in the Limit Registers section.
ADT7461A Registers
The ADT7461A contains 22, 8-bit registers in total. These
registers store the results of remote and local temperature
measurements, high and low temperature limits, and
configure and control the device. See the Address Pointer
Register section through the Consecutive ALERT
Register
section of this data sheet for more information on the
ADT7461A registers. Additional details are shown in
Table 9 through Table 13. The entire register map is
available in Table 14.
Address Pointer Register
The address pointer register itself does not have, nor does
it require, an address because the first byte of every write
operation is automatically written to this register. The data
in this first byte always contains the address of another
register on the ADT7461A that is stored in the address
pointer register. It is to this register address that the second
byte of a write operation is written, or to which a subsequent
read operation is performed.
The power-on default value of the address pointer register
is 0x00. Therefore, if a read operation is performed
immediately after power-on, without first writing to the
address pointer, the value of the local temperature is returned
because its register address is 0x00.
Temperature Value Registers
The ADT7461A has three registers to store the results of
local and remote temperature measurements. These
registers can only be written to by the ADC and can be read
by the user over the SMBus. The local temperature value
register is at Address 0x00.
The external temperature value high byte register is at
Address 0x01, with the low byte register at Address 0x10.
The power-on default for all three registers is 0x00.
Configuration Register
The configuration register is Address 0x03 at read and
Address 0x09 at write. Its power-on default is 0x00. Only
four bits of the configuration register are used. Bit 0, Bit 1,
Bit 3, and Bit 4 are reserved; the user does not write to them.
Bit 7 of the configuration register masks the ALERT
output. If Bit 7 is 0, the ALERT
output is enabled. This is the
power-on default. If Bit 7 is set to 1, the ALERT
output is
disabled. This applies only if Pin 6 is configured as ALERT
.
If Pin 6 is configured as THERM2
, then the value of Bit 7
has no effect.
If Bit 6 is set to 0, which is power-on default, the device
is in operating mode with ADC converting. If Bit 6 is set to
1, the device is in standby mode and the ADC does not
convert. The SMBus does, however, remain active in
standby mode; therefore, values can be read from or written
to the ADT7461A via the SMBus. The ALERT
and THERM
outputs are also active in standby mode. Changes made to
the registers in standby mode that affect the THERM
or
ALERT
outputs cause these signals to be updated.
Bit 5 determines the configuration of Pin 6 on the
ADT7461A. If Bit 5 is 0 (default), then Pin 6 is configured
as an ALERT
output. If Bit 5 is 1, then Pin 6 is configured
as a THERM2
output. Bit 7, the ALERT
mask bit, is only
active when Pin 6 is configured as an ALERT
output. If
Pin 6 is set up as a THERM2
output, then Bit 7 has no effect.
Bit 2 sets the temperature measurement range. If Bit 2 is
0 (default value), the temperature measurement range is set
between 0癈 to +127癈. Setting Bit 2 to 1 sets the
measurement range to the extended temperature range
(64癈 to +191癈).
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ADT7461ARMZ-2R
IC TEMP SENSOR DGTL 2CH 8-MSOP
ADT7463ARQZ-REEL
IC REMOTE THERMAL CTRLR 24-QSOP
ADT7476AARQZ-R
IC REMOTE THERMAL CTLR 24QSOP
ADT7481ARMZ-1RL
IC SENSOR TEMP 2CH ALARM 10MSOP
ADT7482ARMZ-REEL
IC SENSOR TEMP 2CH ALARM 10MSOP
ADT7485AARMZ-R
IC TEMP/VOLT DGL SENS SST 10MSOP
ADT7486AARMZ-RL
IC TEMP SENS DGTL 2CH SST 10MSOP
ADT7488AARMZ-RL
IC TEMP/VOLT DGTL W/SST 10MSOP
相关代理商/技术参数
ADT7461AARMZ-REEL
功能描述:IC SENSOR TEMP DGTL 2CH 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 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:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADT7461AARMZ-REEL7
功能描述:IC SENSOR TEMP DGTL 2CH 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 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:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADT7461AARMZ-RL7
功能描述:板上安装温度传感器 1 TMP DIO MON W/SMBUS ITF RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
ADT7461AEBZEVB
功能描述:BOARD EVAL FOR ADT7461 RoHS:是 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
ADT7461AR
功能描述:IC TEMP MONITOR +/-1C DUAL 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 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:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADT7461ARM
制造商:Rochester Electronics LLC 功能描述:+/-1C TDM SRC EXT TEMP RANGE I.C. - Bulk 制造商:Analog Devices 功能描述:IC TEMP SENSOR
ADT7461ARM2-2
制造商:Analog Devices 功能描述:
ADT7461ARM-REEL
制造商:Rochester Electronics LLC 功能描述:+/-1C TDM SRC EXT TEMP RANGE I.C. - Tape and Reel