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| 型号： | MAX6628MTA+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/9页 |
| 文件大小： | 257K |
| 描述： | IC TEMP SENSOR DGTL 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 功能： | 温度监控系统（传感器） |
| 传感器类型： | 外部 |
| 感应温度： | 外部传感器 |
| 精确度： | ±1°C（最小值） |
| 拓扑： | ADC |
| 输出类型： | SPI? |
| 输出警报： | 无 |
| 输出风扇： | 无 |
| 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： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（2x2） |
| 包装： | 标准包装 |
| 产品目录页面： | 1425 (CN2011-ZH PDF) |
| 其它名称： | MAX6628MTA+TDKR |
Remote ?癈 Accurate Digital Temperature
Sensors with SPI-Compatible Serial Interface
6 _______________________________________________________________________________________
0癈. When power is first applied and V
CC
rises above
1.6V (typ), the device starts to convert, although tem-
perature reading is not recommended at V
CC
levels
below 3.0V.
Serial Interface
Figure 2 is the serial interface timing diagram. The data
is latched into the shift register on the falling edge of
the CS signal and then clocked out at the SDO pin on
the falling edge of SCK with the most-significant bit
(MSB) first. There are 16 edges of data per frame. The
last 2 bits, D0 and D1, are always in high-impedance
mode. The falling edge of CS stops any conversion in
progress, and the rising edge of CS always starts a
new conversion and resets the interface. It is required
to maintain a 320ms minimum pulse width of high CS
signal before a conversion starts.
Applications Information
Remote-Diode Selection
Temperature accuracy depends upon having a good-
quality, diode-connected, small-signal transistor.
Accuracy has been experimentally verified for all of the
devices listed in Table 3. The MAX6627/MAX6628 can
also directly measure the die temperature of CPUs and
other ICs with on-board temperature-sensing diodes.
The transistor must be a small-signal type with a rela-
tively high forward voltage. This ensures that the input
voltage is within the A/D input voltage range. The for-
ward voltage must be greater than 0.25V at 10礎 at the
highest expected temperature. The forward voltage
must be less than 0.95V at 100礎 at the lowest expect-
ed temperature. The base resistance has to be less
than 100? Tight specification of forward-current gain
(+50 to +150, for example) indicates that the manufac-
turer has good process control and that the devices
have consistent characteristics.
ADC Noise Filtering
The integrating ADC has inherently good noise rejec-
tion, especially of low-frequency signals such as
60Hz/120Hz power-supply hum. Micropower operation
places constraints on high-frequency noise rejection.
Lay out the PCB carefully with proper external noise fil-
tering for high-accuracy remote measurements in elec-
trically noisy environments.
Figure 2. SPI Timing Diagram
D15
D0
D1
D2
D3
SCK
SDO
t
DV
t
CSS
t
DO
CS
t
TR
Table 3. SOT23-Type Remote-Sensor
Transistor Manufacturers
MANUFACTURER
MODEL
Central Semiconductor (USA)
CMPT3904
Motorola (USA)
MMBT3904
Rohm Semiconductor (Japan)
SST3904
Siemens (Germany)
SMBT3904
Zetex (England)
FMMT3904CT-ND
Note: Transistors must be diode connected (short the base to
the collector).
Table 2. Temperature Data Format
(Twos Complement)
DIGITAL OUTPUT (BINARY)
TEMPERATURE
(?/SPAN>C)
D15D3
D2
D1, D0
150
0,1001,0110,0000
0
XX
125
0,0111,1101,0000
0
XX
25
0,0001,1001,0000
0
XX
0.0625
0,0000,0000,0001
0
XX
0
0,0000,0000,0000
0
XX
-0.0625
1,1111,1111,1111
0
XX
-25
1,1110,0111,0000
0
XX
-55
1,1100,1001,0000
0
XX
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相关代理商/技术参数 |
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| MAX6629EVKIT | 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 |
| MAX6629MTT+ | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 3-WIRE/SPI 6TDFN EP - Rail/Tube |
| MAX6629MTT+T | 功能描述:板上安装温度传感器 12-Bit + Sign 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 |
| MAX6629MUT | 制造商:Maxim Integrated Products 功能描述:12-BIT + SIGN DIGITAL TEMPERATURE SENSORS WIT - Rail/Tube |
| MAX6629MUT#G16 | 制造商:Maxim Integrated Products 功能描述:12-BIT + SIGN DIGITAL TEMPERATURE SENSORS WITH SERIAL INTERF - Rail/Tube |
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