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参数资料
| 型号： | MAX6626PMTT+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | 9-Bit/12-Bit Temperature Sensors with I<sup>2</sup>C-Compatible Serial Interface in a SOT23 |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 2Cel, SQUARE, SURFACE MOUNT |
| 封装： | 3 X 3 MM, 0.80 MM HEIGHT, LEAD FREE, MO-2212WEEA, TDFN-6 |
| 文件页数： | 3/19页 |
| 文件大小： | 486K |
| 代理商： | MAX6626PMTT+ |
MAX6625/MAX6626
9-Bit/12-Bit Temperature Sensors with
I2C-Compatible Serial Interface in a SOT23
______________________________________________________________________________________
11
drain, and the MAX6625R/MAX6626R output includes
an internal 35k (typ) pullup resistor. Figure 6 shows
the OT alarm operation and reset details.
Fault Queue
A programmable fault queue on the MAX6625/
MAX6626 eliminates spurious alarm activity in noisy
environments. The queue sets the number of consecu-
tive out-of-tolerance temperature readings that must
occur before the OT alarm output is toggled. An out-of-
tolerance reading is above THIGH or below TLOW. The
fault queue depth defaults to one at power-up and may
be programmed to one, two, four, or six consecutive
conversions. Any time the conversion result is in toler-
ance, and OT is not asserted, the queue is cleared,
even if it contains some out-of-tolerance counts.
Additionally, the fault queue automatically clears at
power-up, in shutdown, or if a master writes to any of
the THIGH, TLOW, or configuration registers. Whenever
the fault queue is cleared, OT is deasserted.
For example, the fault queue is set to four, two consec-
utive out-of-tolerance readings have occurred, and the
master writes to the TLOW register. The fault queue is
cleared and begins to look for four new consecutive
out-of-tolerance conversions.
Comparator Mode
In comparator mode, OT is asserted when the number
of consecutive conversions exceeding the value in the
THIGH register is equal to the depth of the fault queue.
OT deasserts when the number of consecutive conver-
sions less than the value in the TLOW register is equal
to the depth of the fault queue. THIGH minus TLOW is
the effective hysteresis of the OT output.
For example, if THIGH is set to +100°C, TLOW is set to
+80°C, and the fault queue depth is set to four, OT
does not assert until four consecutive conversions
exceed +100°C. Then, OT does not deassert until four
consecutive conversions are less than +80°C.
Comparator mode allows autonomous clearing of an OT
fault without the intervention of a master and is ideal to
use for driving a cooling fan (Figure 7).
Interrupt Mode
In interrupt mode, the MAX6625/MAX6626 look for a
THIGH or a TLOW fault based on previous fault activity.
The OT pin asserts an alarm for an undertemperature
fault, as well as for an overtemperature fault, depending
on certain conditions. If the fault queue is cleared at
power-up, the IC looks for a THIGH fault. After a THIGH
fault, the IC looks for a TLOW fault. After a TLOW fault,
the IC looks for a THIGH fault, and it bounces back and
forth if properly deasserted each time. Once either fault
has occurred, it remains active indefinitely until
deasserted by a read of any register, and the device
then begins to look for a fault of the opposite type. Also,
if the fault queue is cleared, OT is deasserted and the
IC once again looks for a THIGH fault. The activation of
any fault is subject to the depth of the fault queue.
DIE
TEMPERATURE
TIME
**
*
THIGH
TLOW
OT
(COMPARATOR MODE)
OT
(INTERRUPT MODE)
TEMPERATURE RESPONSE
SHOWN WITH OT SET FOR
ACTIVE LOW
*THIS ASSUMES DEASSERTION OF OT BY A
MASTER THROUGH THE SERIAL INTERFACE.
SEE INTERRUPT MODE SECTION.
Figure 6. OT Alarm Output and Reset Diagram
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| MAX6626PMTT+T | 功能描述:板上安装温度传感器 9-Bit/12-Bit Temperature Sensor 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 |
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| MAX6626PMUT-T | 功能描述:板上安装温度传感器 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 |
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