ASC7531A ETC2 [List of Unclassifed Manufacturers], ASC7531A Datasheet
ASC7531A
Related parts for ASC7531A
ASC7531A Summary of contents
Page 1
... PC. The temperature sensor supports an internal and external thermal diode. aSC7531A is used with 2N3904 transistor connected as a remote diode, aSC7531B is used with CPU substrate diode. The aSC7531 is available in MSOP-10 surface mount package ...
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... The aSC7531 can be read at any time without interrupting the temperature conversion process. 9. For the aSC7531A, calibration of the remote diode sensor input is set to meet the accuracy limits with a diode-connected 2N3904 that has a non-ideality factor of 1.0046 with a series resistance of 0.6Ω. For the aSC7531B, calibration of the remote diode sensor input is set to meet the accuracy limits with a CPU substrate diode that has a non-ideality factor of 1.009 with a series resistance of 4.52Ω ...
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... Digital Input / Output. SST Bi-directional Data Line. ADC On-Chip Temperature Remote Temperature Remote Diode Open / Short Control and SST Interface VSS Figure 1. Block Diagram - 3 - www.andigilog.com aSC7531A / aSC7531B Description DD Vccp Voltage 2.5V Voltage 3.3V Voltage 5V Voltage 12V Voltage DIB Register ADD0 SST December 2006 - 70A05012 ...
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... Andigilog, Inc. 2006 aSC7531A / aSC7531B Device Power-on Timing Following a power-on reset, such as a system transitioning from S3-S5 to S0, the aSC7531 will be able to participate in ...
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... LSB. The lowest 3 bits are set to zero. Temperature Inputs The aSC7531A has an internal thermal sensor plus an external sensor using a remote diode. The remote sensor is calibrated for a 2N3904 NPN transistor that has a non- ideality (η) factor of approximately 1.0046. Use of the remote diode is discussed in the Applications Information section ...
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... Figure 3. Voltage Reading # Bits # Bits aSC7531 Sending Hex Value Hex Value 8 8 Read Length GetDIB Cmd 0x10 0xF7 8 8 DIB Byte 15 DIB Byte 16 (data) (data www.andigilog.com aSC7531A / aSC7531B Always Zero FCS 0xDC 8 FCS (data dependent) December 0 2006 - 70A05012 ...
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... Figure 7. ResetDevice() format targeting a non-default address 8 8 Target Address Write Length 0x00 0x01 Figure 8. ResetDevice() format targeting the default address © Andigilog, Inc. 2006 aSC7531A / aSC7531B 8 8 Read Length GetDIB Cmd 0x08 0xF7 8 8 DIB Byte 7 DIB Byte 8 (data) ...
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... FCS 0x1A 0x00 © Andigilog, Inc. 2006 8 Read Length Command 0x02 0x00 8 8 MSB FCS 0x0F 0x2D 8 8 Read Length Command 0x02 0x10 8 8 LSB MSB 0x30 Figure 10. Example Read of 12-Volt Value - 8 - www.andigilog.com aSC7531A / aSC7531B 8 8 FCS 0x90 December 2006 - 70A05012 ...
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... Example bus transaction to write to a sensor located at address 0x48. This example writes 2 consecutive locations (0x20 and 0x21) to values 0x25 and 0x28 Target Address Write Length 0x48 0x04 © Andigilog, Inc. 2006 pin. CCP 8 8 Read Length Command 0x00 0xE0 - 9 - www.andigilog.com aSC7531A / aSC7531B CCP December 2006 - 70A05012 ...
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... Read Data 0x25 Figure 12. Example Register Read 8 8 Read Length Command 0x00 0xE2 Figure 13. Vendor Command Enable 8 8 Read Length Command 0x00 0xE3 Figure 14. Vendor Command Disable - 10 - www.andigilog.com aSC7531A / aSC7531B 8 FCS 0x1B 8 FCS 0x28 0x37 8 FCS 0xE0 8 FCS 0xE7 December 2006 - 70A05012 ...
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... Table 4. Command Summary - 11 - www.andigilog.com aSC7531A / aSC7531B Rd Len Bytes Sent by Client 0 FCS 2 FCS/2/FCS 2 FCS/2/FCS 4 FCS/4/FCS Abort FCS 2 FCS/2/FCS 2 FCS/2/FCS 2 FCS/2/FCS 2 ...
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... Support Support Figure 16. Device Capabilities Field Minor Revision 0000 (default) 0000 Figure 17. Version / Revision Field Stored Value (LS,MS) 0x7531 0x3175 - 12 - www.andigilog.com aSC7531A / aSC7531B 8 Device Interface 24 8 Client Vendor Device Specific ID Address LSB Slow Device 0 LSB for V1.0 Pre-production for V1.0 Production ...
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... SST Client Device Address is set according to the connection of the ADD0 pin. The combination part appears to software as two sensors, a simple temperature and a simple voltage sensor residing at the same address. Float is defined as an unconnected pin. ADD0 Address Ground 0x48 Float 0x49 V 0x4A DD © Andigilog, Inc. 2006 aSC7531A / aSC7531B Meaning Table 5. Device Interface Field - 13 - www.andigilog.com December 2006 - 70A05012 ...
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... Coulombs ratio of the two driving currents (10). The aSC7531A is designed and trimmed for an expected value of 1.0046, based on the typical value for the 2N3904. There is also a tolerance on the value provided. gives a representative sample of what one may expect in the range of non-ideality. ...
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... While it is important to minimize the distance to the remote diode to reduce high-frequency noise pickup, they may be located many feet away with proper shielding. Shielded, twisted-pair cable is recommended, connected only at the aSC7531A end as close as possible to the ground pin of the device 2N3904 2N3906 ...
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... The power consumption of the aSC7531 is relatively low and should have little self-heating effect on the local sensor reading. At the highest measurement rate the dissipation is less than 2mW, resulting in only a few tenths of a degree rise. © Andigilog, Inc. 2006 aSC7531A / aSC7531B - 16 - www.andigilog.com December 2006 - 70A05012 ...
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... A 0.94mm (max) A 0.05mm (min) 0.15mm (max www.andigilog.com aSC7531A / aSC7531B Detail B α 0° (min) 6° (max) 0.40mm (min) 0.70mm (max) 0.95mm BSC Detail B 2.85mm (min) 3.05mm (max) 2.90mm (min) 3.10mm (max) 4 ...
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... A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness. Andigilog, Inc. 8380 S. Kyrene Rd., Suite 101 Tempe, Arizona 85284 Tel: (480) 940-6200 Fax: (480) 940-4255 © Andigilog, Inc. 2006 aSC7531A / aSC7531B - 18 - www.andigilog.com December 2006 - 70A05012 ...