 |
Moteur de recherche de fiches techniques de composants électroniques |
|
|
Moteur de recherche de fiches techniques de composants électroniques |
|
UZZ9001 Fiches technique(PDF) 9 Page - NXP Semiconductors |
|
||||||||||||||||||||||||||||||
UZZ9001 Fiches technique(HTML) 9 Page - NXP Semiconductors |
|
|
9 / 16 page  2000 Nov 27 9 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 Table 4 Programming of trim modes MODE STATUS BITS 12 3 4 5 enter trim mode for sensor input channel 1 0 0 0 1 0 enter trim mode for sensor input channel 2 0 0 1 0 0 leave trim mode for either input channel 0 0 0 0 0 How to enter the trim mode Details of voltage levels and timing of the status bits to be transmitted to the UZZ9001 are given in Table 3. Note that a complete protocol has to be sent before normal operation can be resumed. The trim mode can also be exited by resetting the device. After entering one of the trim modes and provided there is a dynamic input signal there will be a square wave output at the terminal TOUT (pin 22). Reset In addition to the external reset pin (pin 6), the UZZ9001 provides an internal power-up/ power-down reset logic which continuously monitors the supply voltage. When the supply voltage increases and reaches a safe level, reset becomes inactive and the device starts initialization. When the supply voltage exceeds the safe voltage level, the device is reset immediately. This internal reset logic can be over-ridden in all modes and at any time by applying an external active high command to the RES input pin (pin 6) in all modes and at any time. The reset pin RES (pin 6). This pin is internally pulled to ground and therefore need not be connected if the function is not required. Measurement dynamics The UZZ9001 includes an on-chip RC Oscillator that generates the clock for the whole device. Consequently, no external clock supply is required for the measurement system. The nominal clock frequency of the on-chip oscillator is 4 MHz at room temperature. It varies with temperature change. At −40 °C the clock frequency may decrease to 2.3 MHz. At higher temperatures however, a frequency up to 5.7 MHz may occur. This influences the dynamics of measurements. From an application point of view, two different effects have to be distinguished. The system delay, which means how long it takes until a changed input signal is recognized at the output, and the measurement update rate. The system delay is mainly caused by the settling time of the low pass decimation filter, which depends on the maximum frequency content (shape) of the input signals and the clock frequency. The following maximum values can be expected for the entire system delay. The measurement update rate, however, is directly related to the oscillator frequency. At room temperature, a new value is available every 0.26 ms. When taking the entire temperature range into account, update rates between 0.45 and 0.18 ms are possible. (see Table 5) |
Numéro de pièce similaire - UZZ9001 |
|
Description similaire - UZZ9001 |
|
|
|
Lien URL |
| Politique de confidentialité |
| ALLDATASHEET.FR |
| ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |
French ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
