Moteur de recherche de fiches techniques de composants électroniques |
|
BA3835F Fiches technique(PDF) 4 Page - Rohm |
|
BA3835F Fiches technique(HTML) 4 Page - Rohm |
4 / 5 page 4/4 REV. G (5) Thermal design Perform thermal design in which there are adequate margins by taking into account the allowable power dissipation in actual states of use. (6) Shorts between pins and misinstallation When mounting the LSI on a board, pay adequate attention to orientation and placement discrepancies of the LSI. If it is misinstalled and the power is turned on, the LSI may be damaged. It also may be damaged if it is shorted by a foreign substance coming between pins of the LSI or between a pin and a power supply or a pin and a GND. (7) Operation in strong magnetic fields Adequately evaluate use in a strong magnetic field, since there is a possibility of malfunction. (8) Frequency characteristics The frequency characteristics of this IC are determined by the resistor connected between the R REF terminal and GND. For the specification conditions, the value of this resistor is 100kΩ. If it is necessary to set the frequency characteristics accurately, use a variable resistor (note: all bands will shift together). (9) Load characteristics To convert the bias sense output signal to the GND sense signal, the IC performs a V / I conversion, and then an I /V conversion using a 10kΩresistor (Typ.) for the output. Therefore, if the load circuit connected to the AOUT pin has a MOS structure there is no problem (eg. Microprocessor input port), but if the connected circuit has a low input impedance, it may cause the output level to drop. (10) External resistor for the control pin When using a common port for the output select control and FL drive, you must add a diode and resistor as shown in the right figure to prevent the FL drive “L” voltage from destroying the IC. In this case, the “L” voltage applied to the internal comparator input terminal V 1 is given by: To maintain a noise margin of at least 2.5V with respect to the comparator threshold level VREF, the representative values for VREF, R1 and R2 are 1.5V, 20kΩ, and 10kΩrespectively. This gives: And from this, the following condition is obtained: R<30kΩ In this case, the “L” level voltage V2 for the IC will be: V 2<0.75V (11) Recommended operating ranges Provided that the IC is operated within the recommended operating conditions and the recommended temperature range, the basic circuit functions are guaranteed. Within these ranges, ratings for electrical characteristics for conditions other than those stipulated cannot be guaranteed, but the inherent function of the band pass filter will be maintained. (12) Output offset voltage The relationship between the output offset voltage and the output selection cycle (cycle time) for this IC is shown in Fig.5. The maximum output offset voltage of 150mV that is given in the electrical characteristics table is under the condition that Ts = 200ms. When Ts is greater than 50ms, the graph of the output offset voltage is a straight line at 150mV. When Ts is below 50ms, due to transient characteristics of the peak hold circuit, the graph is a line sloping downwards to the right. In other words, the shorter the cycle, the larger the output offset voltage. Furthermore, the output offset voltage may shift due to soldering or other temperature stresses from the surroundings. Therefore, when setting the spectral analyzer light level, take into consideration the points given above and make sure that it does not light by mistake during quiescent periods. Use the chart below as a guide for this, and, if necessary, leave even a larger margin. V1 = × Vref R1+R2+R R1 +R × 1.5V+0.25V < 1.5V 20kΩ+20kΩ+R 20kΩ+R BA3835F |
Numéro de pièce similaire - BA3835F |
|
Description similaire - BA3835F |
|
|
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 |