数据搜索系统,热门电子元器件搜索 |
|
MAX6627 数据表(PDF) 5 Page - Maxim Integrated Products |
|
MAX6627 数据表(HTML) 5 Page - Maxim Integrated Products |
5 / 9 page Remote ±1°C Accurate Digital Temperature Sensors with SPI-Compatible Serial Interface _______________________________________________________________________________________ 5 Detailed Description The MAX6627/MAX6628 remote digital thermometers report the temperature of a remote sensor. The remote sensor is a diode-connected transistor—typically, a low-cost, easily mounted 2N3904 NPN type—that replaces conventional thermistors or thermocouples. The MAX6627/MAX6628 can also measure the die tem- perature of other ICs, such as µPs or µCs, that contain an on-chip, diode-connected transistor. Remote accuracy is ±1°C when the temperature of the remote diode is between 0°C and +125°C and the tem- perature of the MAX6627/MAX6628 is +30°C. Data is available as a 12-bit + sign word with 0.0625°C resolu- tion. The operating range of the device extends from -55°C to +125°C, although the architecture of the device is capable of interpreting data up to +145°C. The device itself should never exceed +125°C. The MAX6627/MAX6628 are designed to work in con- junction with an external µC or other intelligent device serving as the master in thermostatic, process-control, or monitoring applications. The µC is typically a power management or keyboard controller, generating SPI serial commands by “bit-banging” GPIO pins. Two conversion rates are available; the MAX6627 con- tinuously converts data every 0.5s, and the MAX6628 continuously converts data every 8s. Either device can be read at any time and provide the data from the last conversion. The slower version provides minimal power consumption under all operating conditions. Or, by tak- ing CS low, any conversion in progress is stopped, and the rising edge of CS always starts a fresh conversion and resets the interface. This permits triggering a con- version at any time so that the power consumption of the MAX6627 can be overcome, if needed. Both devices operate with input voltages between +3.0V and +5.5V and are specified between -55°C and +125°C. The MAX6627 and MAX6628 come in space-saving 8- pin SOT23 packages. ADC Conversion Sequence The device powers up as a free-running data converter (Figure 1). The CS pin can be used for conversion con- trol. The rising edge of CS resets the interface and starts a conversion. The falling edge of CS stops any conversion in progress, overriding the latency of the part. Temperature data from the previous completed conversion is available for read (Tables 1 and 2). It is required to maintain CS high for a minimum of 320ms to complete a conversion. Idle Mode Pull CS low to enter idle mode. In idle mode, the ADC is not converting. The serial interface is still active and temperature data from the last completed conversion can still be read. Power-On Reset The POR supply voltage of the MAX6627/MAX6628 is typically 1.6V. Below this supply voltage, the interface is inactive and the data register is set to the POR state, Figure 1. Free-Running Conversion Time and Rate Relationships MAX6627 MAX6628 0.5s SAMPLE RATE 8s SAMPLE RATE 0.25s CONVERSION TIME ADC CONVERTING ADC IDLE D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Sign MSB Data LSB Data Low High-Z High-Z Table 1. Data Output Format |
类似零件编号 - MAX6627 |
|
类似说明 - MAX6627 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |