| Part Numbert | Mfg | Packt | D/C | Descriptiont | Qty | Company/Contact | |
| SVM7571C | SVM | DIP | 96 | 1056 |
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SVM7571C Datasheet
SVM7571C Price Response of the AD22105 internal die temperature to abrupt changes in ambient temperatures can be modeled by a single time constant exponential function. Figure 11 shows typical response plots for moving and still air. The time constant, T (time to reach 63.2% of the final value), is dependent on OJA and the thermal capacities of the chip and the package. Table I lists the effective r for moving and still air. Copper printed circuit board connections were neglected in the analysis; however, they will sink or conduct heat directly through the AD22105's solder plated copper leads. When faster response is required, a therm- ally conductive grease or glue between the AD22105 and the surface temperature being measured should be used. SVM7571C on stock Since the closed-loop bandwidth is a function of RF and CCOMP (Figure 29), it is independent of the amplifier closed-loop gain, as shown in Figure 31. To preserve stability, the time constant of RF and CCOMP needs to provide a bandwidth ofless than 65 MHz. For example, with CCOMP = 15 pF and RF = 1 kQ, the small signal bandwidth of the AD829 is 10 MHz, while Figure 30 shows that the slew rate is in excess of 60 V/hts. As can be seen in Figure 31, the closed-loop bandwidth is constant for gains of -1 to -4, a property of current feedback amplifiers. POWER DISSIPATION The power dissipation (PDISSIPA-rION) and junction tempera- ture (Tj) can be approximated with the equations below. PIN is the power generated by the l.5xx charge pump, PLED iS the power consumed by the LEDs, TAiS the ambient tem- perature, and OJA iS the junction-to-ambient thermal resis- tance for the LLP-14 package. VIN iS the input voltage to the LM27952, VLED iS the nominal LED forward voltage, and ILED iS the programmed LED current. PDISSIPATION = PIN - PLED = [Gain x VIN x (4 x ILED)l - (VLED x 4 x ILED) Tj = TA + (PDISSIPATION X OJA) |
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