 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TMP411-Q1 Datasheet(PDF) 14 Page - Texas Instruments |
|
|
|
|||||||||||||||||||||||||||||
TMP411-Q1 Datasheet(HTML) 14 Page - Texas Instruments |
|
|
14 / 33 page  TMP411 SBOS383C − DECEMBER 2006 − REVISED MAY 2008 www.ti.com 14 N-FACTOR CORRECTION REGISTER The TMP411 allows for a different n-factor value to be used for converting remote channel measurements to temperature. The remote channel uses sequential current excitation to extract a differential VBE voltage measurement to determine the temperature of the remote transistor. Equation 1 relates this voltage and temperature. V BE2 * V BE1 + nkT q ln I 2 I 1 The value n in Equation 1 is a characteristic of the particular transistor used for the remote channel. The default value for the TMP411 is n = 1.008. The value in the N-Factor Correction Register may be used to adjust the effective n-factor according to Equation 2 and Equation 3. n eff + 1.008 @ 300 300 *N ADJUST N ADJUST + 300* 300 @ 1.008 n eff The n-correction value must be stored in two’s-complement format, yielding an effective data range from −128 to +127, as shown in Table 8. The n-correction value may be written to and read from pointer address 18h. The register power-on reset value is 00h, thus having no effect unless written to. Table 8. N-Factor Range NADJUST BINARY HEX DECIMAL N 01111111 7F 127 1.747977 00001010 0A 10 1.042759 00001000 08 8 1.035616 00000110 06 6 1.028571 00000100 04 4 1.021622 00000010 02 2 1.014765 00000001 01 1 1.011371 00000000 00 0 1.008 11111111 FF −1 1.004651 11111110 FE −2 1.001325 11111100 FC −4 0.994737 11111010 FA −6 0.988235 11111000 F8 −8 0.981818 11110110 F6 −10 0.975484 10000000 80 −128 0.706542 MINIMUM AND MAXIMUM REGISTERS The TMP411 stores the minimum and maximum temperature measured since power-on, chip-reset, or minimum and maximum register reset for both the local and remote channels. The Local Temperature Minimum Register may be read by reading the high byte from pointer address 30h and the low byte from pointer address 31h. The Local Temperature Minimum Register may also be read by using a two-byte read command from pointer address 30h. The Local Temperature Minimum Register is reset at power-on, by executing the chip-reset command, or by writing any value to any of pointer addresses 30h through 37h. The reset value for these registers is FFh/F0h. The Local Temperature Maximum Register may be read by reading the high byte from pointer address 32h and the low byte from pointer address 33h. The Local Temperature Maximum Register may also be read by using a two-byte read command from pointer address 32h. The Local Temperature Maximum Register is reset at power-on by executing the chip reset command, or by writing any value to any of pointer addresses 30h through 37h. The reset value for these registers is 00h/00h. The Remote Temperature Minimum Register may be read by reading the high byte from pointer address 34h and the low byte from pointer address 35h. The Remote Temperature Minimum Register may also be read by using a two-byte read command from pointer address 34h. The Remote Temperature Minimum Register is reset at power-on by executing the chip reset command, or by writing any value to any of pointer addresses 30h through 37h. The reset value for these registers is FFh/F0h. The Remote Temperature Maximum Register may be read by reading the high byte from pointer address 36h and the low byte from pointer address 37h. The Remote Temperature Maximum Register may also be read by using a two-byte read command from pointer address 36h. The Remote Temperature Maximum Register is reset at power-on by executing the chip reset command, or by writing any value to any of pointer addresses 30h through 37h. The reset value for these registers is 00h/00h. (1) (2) (3) |
Similar Part No. - TMP411-Q1 |
|
Similar Description - TMP411-Q1 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
