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ISL21070DIH306Z-TK Folha de dados(PDF) 7 Page - Renesas Technology Corp |
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ISL21070DIH306Z-TK Folha de dados(HTML) 7 Page - Renesas Technology Corp |
7 / 12 page ISL21070 FN7599 Rev 4.00 Page 7 of 12 September 3, 2015 Applications Information FGA Technology The ISL21070 series of voltage references use the floating gate technology to create references with very low drift and supply current. Essentially, the charge stored on a floating gate cell is set precisely in manufacturing. The reference voltage output itself is a buffered version of the floating gate voltage. The resulting reference device has excellent characteristics which are unique in the industry: very low temperature drift, high initial accuracy, and almost zero supply current. Also, the reference voltage itself is not limited by voltage bandgaps or zener settings, so a wide range of reference voltages can be programmed (standard voltage settings are provided, but customer-specific voltages are available). The process used for these reference devices is a floating gate CMOS process, and the amplifier circuitry uses CMOS transistors for amplifier and output transistor circuitry. While providing excellent accuracy, there are limitations in output noise level and load regulation due to the MOS device characteristics. These limitations are addressed with circuit techniques discussed in other sections. Handling and Board Mounting FGA references provide excellent initial accuracy and low temperature drift at the expense of very little power drain. There are some precautions to take to insure this accuracy is not compromised. Excessive heat during solder reflow can cause excessive initial accuracy drift, so the recommended +260°C max temperature profile should not be exceeded. Expect up to 1mV drift from the solder reflow process. FGA references are susceptible to excessive X-radiation like that used in PC board manufacturing. Initial accuracy can change 10mV or more under extreme radiation. If an assembled board needs to be X-rayed, care should be taken to shield the FGA reference device. FIGURE 14. ZOUT vs f vs CL FIGURE 15. PSRR vs FREQUENCY FIGURE 16. VOUT NOISE, 0.1Hz TO 10Hz Typical Performance Characteristics Curves VOUT = 2.5V, VIN = 3V, IOUT = 0mA, TA = +25°C unless otherwise specified. (Continued) 0 20 40 60 80 100 120 1 10 100 1k 10k 100k 1M FREQUENCY (Hz) 1nF LOAD 10nF LOAD 100nF LOAD NO LOAD -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) NO LOAD 100nF LOAD 1nF LOAD 10nF LOAD 1s/DIV |
Nº de peça semelhante - ISL21070DIH306Z-TK |
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Descrição semelhante - ISL21070DIH306Z-TK |
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