ADT7301 Analog Devices, ADT7301 Datasheet
ADT7301
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ADT7301 Summary of contents
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... ADC to monitor and digitize the temperature reading to a resolution of 0.03125°C. The ADT7301 has a flexible serial interface that allows easy interfacing to most microcontrollers. The interface is compat- ible with SPI®, QSPI™, and MICROWIRE™ protocols as well as DSPs. The part features a standby mode that is controlled via the serial interface. The ADT7301’ ...
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... ADT7301 TABLE OF CONTENTS Specifications.....................................................................................3 Timing Characteristics.................................................................4 Absolute Maximum Ratings............................................................5 ESD Caution..................................................................................5 Pin Configurations and Function Descriptions............................6 Typical Performance Characteristics..............................................7 Circuit Information ..........................................................................8 Converter Details..........................................................................8 REVISION HISTORY Revision PrE: Preliminary Version Preliminary Technical Data Temperature Value Register ........................................................ 8 Serial Interface .............................................................................. 9 Microprocessor Interfacing....................................................... 10 Mounting The ADT7302........................................................... 12 Supply Decoupling ...
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... Thermal Time Constant is the time it takes for a starting temperature difference to change to 36.8% of it’s starting value. For example if the ADT7301 experienced a thermal shock from 0°C to 100°C, it would take typically 2 secs for the ADT7301 to reach 63.2°C. ...
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... ADT7301 TIMING CHARACTERISTICS Guaranteed by design and characterization, not production tested. All input signals are specified with (10 and timed from a voltage level 5.5 V, unless otherwise noted. A MIN MAX DD Table 2. 1 Parameter Limit ...
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... Time at Peak Temperature Ramp-up Rate Ramp-down Rate not recommended to operate the ADT7301 at temperatures above 125°C for greater than a total the lifetime of the device. Any exposure beyond this limit will affect device reliability. 2 Values relate to package being used on a standard 2-layer PCB. Reference ...
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... SCLK 4 Serial Clock Input. This is the clock input for the serial port. The serial clock is used to clock data out of the ADT7301’s temperature value register and to clock data into the ADT7301’s control register Chip Select Input. Logic input. The device is selected when this input is low. The SCLK input is disabled when this pin is high ...
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... Vdd = 10E+3 -5 -10 105 155 Figure 10. Temperature Accuracy vs. Supply Ripple Frequency 140 120 100 5.0 5.5 6.0 Rev. PrJ | Page 3.0 3.5 4.0 4.5 5.0 Supply Voltage (V) 100E+3 1E+6 10E+6 Frequency (Hz Time (sec) Figure 11. Response to Thermal Shock ADT7301 5.5 6.0 100E ...
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... The ADT7301 can be taken out of shutdown mode by writing all zeros into the control register. The conversion result from the last conversion prior to shut- down can still be read from the ADT7301 even when shutdown mode. In normal conversion mode, the internal clock oscillator is reset after every read or write operation ...
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... Only the third bit in the data stream provides a user-controlled function. This third bit is the power- down bit, which, when set puts the ADT7301 into shutdown mode. Besides the power-down bit, all bits in the input data stream should be zero to ensure correct operation of the ADT7301 ...
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... In the example shown, the ADT7301 is connected to the serial port of the 8051. Because the serial interface of the 8051 contains only one data line, the DIN line of the ADT7301 is tied low in the interface example given in Figure 15. For applications that require the ADT7301’ s power-down feature, the serial interface should be implemented using data port lines on the 8051 ...
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... CS setup time. //Bring CS high. //16bit ADC code is stored ADC_Temp_Code. //Covert to float for division. //Check sign bit for negative value. //Conversion formula if negative temperature. //Conversion formula if positive temperature. //Temperature value stored in TempVal. Rev. PrJ | Page ADT7301 ...
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... Care should be taken to ensure that this is in good thermal contact with the surface being measured. As with any IC, the ADT7301 and its associated wiring and circuits must be kept free from moisture to prevent leakage and corrosion, particularly in cold conditions where condensation is more likely to occur ...
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... Figure 18. 6-Lead Small Outline Transistor Package [SOT-23] (RJ-6) Dimensions shown in millimeters 3.00 BSC 8 5 3.00 4.90 BSC BSC 4 PIN 1 0.65 BSC 1.10 MAX 0.15 0.00 8° 0.38 0.23 0° 0.22 0.08 COPLANARITY SEATING 0.10 PLANE COMPLIANT TO JEDEC STANDARDS MO-187AA Figure 19. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters Rev. PrJ | Page 10° 0.60 4° 0.45 0° 0.30 0.80 0.60 0.40 ADT7301 ...
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... ADT7301ARM-REEL7 −40°C to +150°C ADT7301ARM-REEL −40°C to +150°C 2 ADT7301ARTZ-500RL7 −40°C to +150°C 2 ADT7301ARTZ-REEL7 −40°C to +150°C 2 ADT7301ARTZ-REEL −40°C to +150°C 2 ADT7301ARMZ −40°C to +150°C 2 ADT7301ARMZ-REEL7 −40°C to +150°C 2 ADT7301ARMZ-REEL −40°C to +150°C 1 Temperature accuracy is over 0° ...