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参数资料
| 型号： | MAX6698UE38+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | 7-Channel Precision Remote-Diode, Thermistor, and Local Temperature Monitor |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL |
| 封装： | 4.40 MM, PLASTIC, MO-153AB, TSSOP-16 |
| 文件页数： | 6/27页 |
| 文件大小： | 489K |
| 代理商： | MAX6698UE38+ |
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MAX6698
channel 1. The series resistance cancellation function
increases the conversion time for channel 1 by 125ms.
This feature cancels the bulk resistance of the sensor
and any other resistance in series (wire, contact resis-
tance, etc.). The cancellation range is from 0 to 100.
Discrete Remote Diodes
When the remote-sensing diode is a discrete transistor,
its collector and base must be connected together.
Table 11 lists examples of discrete transistors that are
appropriate for use with the MAX6698. The transistor
must be a small-signal type with a relatively high for-
ward voltage; otherwise, the A/D input voltage range
can be violated. The forward voltage at the highest
expected temperature must be greater than 0.25V at
10A, and at the lowest expected temperature, the for-
ward voltage must be less than 0.95V at 100A. Large
power transistors must not be used. Also, ensure that
the base resistance is less than 10. Tight specifica-
tions for forward current gain (50 < <150, for exam-
ple) indicate that the manufacturer has good process
controls and that the devices have consistent VBE char-
acteristics. Manufacturers of discrete transistors do not
normally specify or guarantee ideality factor. This is
normally not a problem since good-quality discrete
transistors tend to have ideality factors that fall within a
relatively narrow range. We have observed variations in
remote temperature readings of less than ±2°C with a
variety of discrete transistors. Still, it is good design
practice to verify good consistency of temperature
readings with several discrete transistors from any
manufacturer under consideration.
Unused Diode Channels
If one or more of the remote-diode channels is not need-
ed, either short the DXP and DXN pins for that channel or
leave them open. The status register indicates a diode
“fault” for this channel and the channel is ignored during
the temperature-measurement sequence.
Thermistor Measurements
The MAX6698 can use three external thermistors to
measure temperature. A thermistor’s resistance varies
as a function of temperature. A negative temperature
coefficient (NTC) thermistor can be connected between
the thermistor input and ground, with a series resistor,
REXT_, connected from the thermistor input to VREF.
7-Channel Precision Remote-Diode, Thermistor,
and Local Temperature Monitor
14
______________________________________________________________________________________
BIT
NAME
POR
STATE
FUNCTION
7(MSB)
Reserved
0
—
6
Local ALERT
0
Local Channel High-Alert Bit. This bit is set to logic 1 when the local
temperature exceeds the temperature threshold limit in the local ALERT high-
limit register.
5
Thermistor 3 ALERT
0
Thermistor 3 Alert Bit. This bit is set to logic 1 when the thermistor 3 voltage
exceeds the threshold limit in the thermistor 3 ALERT high-limit register.
4
Thermistor 2 ALERT
0
Thermistor 2 Alert Bit. This bit is set to logic 1 when the thermistor 2 voltage
exceeds the threshold limit in the thermistor 2 ALERT high-limit register.
3
Thermistor 1 ALERT
0
Thermistor 1 Alert Bit. This bit is set to logic 1 when the thermistor 1 voltage
exceeds the threshold limit in the thermistor 1 ALERT high-limit register.
2
Remote-Diode 3
ALERT
0
Channel 3 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 3 remote-diode temperature exceeds the programmed temperature
threshold limit in the remote 3 ALERT high-limit register.
1
Remote-Diode 2
ALERT
0
Channel 2 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 2 remote-diode temperature exceeds the temperature threshold limit
in the remote 2 ALERT high-limit register.
0
Remote-Diode 1
ALERT
0
Channel 1 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 1 remote-diode temperature exceeds the temperature threshold limit
in the remote 1 ALERT high-limit register.
Table 8. Status 1 Register
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6698UE38+ | 功能描述:板上安装温度传感器 7Ch Precision Remote Diode Thermistor 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 |
| MAX6698UE38+T | 功能描述:板上安装温度传感器 7Ch Precision Remote Diode Thermistor 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 |
| MAX6698UE38-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 |
| MAX6698UE99 | 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 |
| MAX6698UE99+ | 功能描述:板上安装温度传感器 7Ch Precision Remote Diode Thermistor 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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