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| 型号： | MAX6681MEE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/17页 |
| 文件大小： | 242K |
| 描述： | IC TEMP SENSOR SMBUS 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 功能： | 温度计，恒温计 |
| 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： | ±5°C 本地（最大），±3°C 远程（最大） |
| 拓扑： | ADC，多路复用器，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
To ensure valid extended data, read extended resolu-
tion temperature data using one of the following
approaches:
1) Put the MAX6680/MAX6681 into standby mode by
setting bit 6 of the Configuration register to 1. Initiate
a one-shot conversion using Send Byte command
0Fh. When this conversion is complete, read the
contents of the temperature data registers.
2) If the MAX6680/MAX6681 are in run mode, read the
Status register. If a conversion is in progress, the
BUSY bit is set to 1. Wait for the conversion to com-
plete as indicated by the BUSY bit being set to zero,
then read the temperature data registers.
Diode Fault Alarm
There is a continuity fault detector at DXP that detects
an open circuit between DXP and DXN, or a DXP short
to V
CC
, GND, or DXN. If an open or short circuit exists,
the External Temperature register is loaded with 1000
0000. Additionally, if the fault is an open circuit, bit 2
(OPEN) of the Status byte is set to 1 and the ALERT
condition is activated at the end of the conversion.
Immediately after power-on reset, the Status register
indicates that no fault is present until the end of the first
conversion.
Alarm Threshold Registers
Four registers store ALERT threshold valuesone high-
temperature (T
HIGH
) and one low-temperature (T
LOW
)
register each for the local and remote channels. If
either measured temperature equals or exceeds the
corresponding ALERT threshold value, the ALERT out-
put is asserted.
The POR state of both ALERT T
HIGH
registers is 0111
1111 or +127癈 and the POR state of T
LOW
registers is
1100 1001 or -55癈.
Two additional registers, RWOE and RWOI, store
remote and local alarm threshold data information cor-
responding to the OVERT output (see the OVERT
Overtemperature Alarm section).
ALERT
The ALERT output operates in two modesthe typical
interrupt mode and comparator mode. The INT_SEL
input determines the mode. When INT_SEL is connect-
ed to V
CC
high, using a weak pullup resistor, or left
floating, the ALERT functions in the interrupt mode.
ALERT Interrupt Mode
An ALERT interrupt occurs when the internal or external
temperature reading exceeds a high or low tempera-
ture limit (user programmed) or when the remote diode
is disconnected (for continuity fault detection). The
ALERT interrupt output signal is latched and can be
cleared only by either reading the Status register or by
successfully responding to an Alert Response address.
In both cases, the alert is cleared even if the fault con-
dition still exists, but is reasserted at the end of the next
conversion. The interrupt does not halt automatic con-
versions. The interrupt output pin is open drain so that
multiple devices can share a common interrupt line.
The interrupt rate never exceeds the conversion rate.
Comparator Mode
Connecting INT_SEL to ground operates the ALERT
output in comparator mode. In the comparator mode,
whenever the temperature of the remote or local temp
sensor goes outside the limits set by T
HIGH
or T
LOW
,
the ALERT output becomes inactive after the tempera-
?癈 Fail-Safe Remote/Local Temperature
Sensors with SMBus Interface
10 ______________________________________________________________________________________
TEMP (?/SPAN>C)
LEGACY MODE
DIGITAL OUTPUT
EXTENDED
RANGE
DIGITAL OUTPUT
127.00
0111 1111
0111 1111
25
0001 1001
0001 1001
1
0000 0001
0000 0001
0.00
0000 0000
0000 0000
-1
0000 0000
1111 1111
-25
0000 0000
1110 0111
-64
0000 0000
1000 0000
Diode Fault
(Short or
Open)
1000 0000
1000 0000
Table 2. Data Format (Twos Complement)
FRACTIONAL
TEMPERATURE
CONTENTS OF
EXTENDED REGISTER
0.000
000X XXXX
0.125
001X XXXX
0.250
010X XXXX
0.375
011X XXXX
0.500
100X XXXX
0.625
101X XXXX
0.750
110X XXXX
0.875
111X XXXX
Table 3. Extended Resolution Register
Note: Extended mode applies only for conversion rates of 4Hz
and slower.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6681MEE+ | 功能描述:板上安装温度传感器 Fail-Safe 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 |
| MAX6681MEE+T | 功能描述:板上安装温度传感器 Fail-Safe 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 |
| MAX6681MEE-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 |
| MAX6682MUA | 功能描述:数据转换 IC - 多种 RoHS:否 制造商:Texas Instruments 转换器数量:1 分辨率:8 bit 工作电源电压:2.7 V to 5.5 V 功耗: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Reel |
| MAX6682MUA+ | 功能描述:数据转换 IC - 多种 Thermistor to Digital Converter RoHS:否 制造商:Texas Instruments 转换器数量:1 分辨率:8 bit 工作电源电压:2.7 V to 5.5 V 功耗: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Reel |
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