8 /6 — AD580. 1mV. 100. AK NOIS. 2.51. AK-TO-P. E P. 2.50. 2.49. MAXIMUM. …
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AD580. 1mV. 100. AK NOIS. 2.51. AK-TO-P. E P. 2.50. 2.49. MAXIMUM. VOLTAGE CHANGE. 10k. 100k. FROM 0. C TO 70. FREQUENCY (Hz). 2.48. OUTPUT VOLTAGE (V)
link to page 6 link to page 6 link to page 6 link to page 6 link to page 6 AD580 The consistent voltage versus temperature performance of a 1mV typical AD580 is shown in Figure 7. Note that the characteristic is quasi-parabolic, not the possible S type characteristics of classical Zener references. This parabolic characteristic permits E a maximum output deviation specification over the device’s full 100 µ V operating temperature range, rather than just at 3 to 5 discrete AK NOIS temperatures. E2.51AK-TO-P10 µ VE P2.50 -009 00525-B 2.49MAXIMUM0VOLTAGE CHANGE1001k10k100k1MFROM 0 ° C TO 70 ° CFREQUENCY (Hz) Figure 9. Peak-to-Peak Output Noise vs. Frequency 2.48OUTPUT VOLTAGE (V)2.47 -007 2.46 00525-B –55–300255075100125TEMPERATURE ( ° C) Figure 7. Typical AD580K Output Voltage vs. Temperature The AD580M guarantees a maximum deviation of 1.75 mV over the 0°C to 70°C temperature range. This can be shown to be equivalent to 10 ppm/°C average maximum; i.e., 500 µ A 1.75 mV max -010 1 × = 10 ppm / C ° max average 5V 70 C ° 2. V 5 00525-B Figure 10. Input Current vs. Input Voltage (Integral Loads) The AD580 typically exhibits a variation of 1.5 mV over the power supply range of 7 V to 30 V. Figure 8 is a plot of AD580 THE AD580 AS A CURRENT LIMITER line rejection versus frequency. The AD580 represents an excellent alternative to current limiter NOISE PERFORMANCE diodes that require factory selection to achieve a desired Figure 9 represents the peak-to-peak noise of the AD580 from current. This approach often results in temperature coefficients 1 Hz (3 dB point) to a 3 dB high end shown on the horizontal of 1%/C. The AD580 approach is not limited to a specially axis. Peak-to-peak noise from 1 Hz to 1 MHz is approximately selected factory set current limit; it can be programmed from 600 µV. 1 mA to 10 mA with the insertion of a single external resistor. The approximate temperature coefficient of current limit for the 140 AD580 used in this mode is 0.13%/°C for ILIM = 1 mA and 130e = 23V p-p 0.01%/°C for ILIM = 13 mA (see Figure 11). Figure 10 displays 120 the high output impedance of the AD580 used as a current 110k e OUT p-pE = 18.5VAD580 limiter for ILIM = 1, 2, 3, 4, and 5 mA. 10090E IN COMPOSITE (17V ≤ V ≤ IN30V)8070V+, p-p (mV)60OUTE 50AD58040OUTPUT2.5V302.5Vi ≅ + 1mA20RR -008 LOAD10V–0 00525-B BOTTOM VIEW OF101001k10k100k -011 2.5V PRECISIONLINE FREQUENCY (Hz)REFERENCE CIRCUITIN TO-52 CASE Figure 8. AD580 Line Rejection Plot 00525-B Figure 11. A Two-Component Precision Current Limiter Rev. B | Page 6 of 8 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS AD580 CHIP DIMENSIONS AND PAD LAYOUT ESD CAUTION THEORY OF OPERATION VOLTAGE VARIATION VERSUS TEMPERATURE NOISE PERFORMANCE THE AD580 AS A CURRENT LIMITER THE AD580 AS A LOW POWER, LOW VOLTAGE, PRECISION REFERENCE F OUTLINE DIMENSIONS ORDERING GUIDE