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LT1461DHS8-4 Datasheet(PDF) 4 Page - Linear Technology |
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LT1461DHS8-4 Datasheet(HTML) 4 Page - Linear Technology |
4 / 16 page 4 LT1461 ELECTRICAL CHARACTERISTICS Note 8: Long-term drift typically has a logarithmic characteristic and therefore, changes after 1000 hours tend to be much smaller than before that time. Total drift in the second thousand hours is normally less than one third that of the first thousand hours with a continuing trend toward reduced drift with time. Long-term drift will also be affected by differential stresses between the IC and the board material created during board assembly. See the Applications Information section. Note 9: Hysteresis in output voltage is created by package stress that depends on whether the IC was previously at a higher or lower temperature. Output voltage is always measured at 25 °C, but the IC is cycled hot or cold before successive measurements. Hysteresis is roughly proportional to the square of the temperature change. Hysteresis is not normally a problem for operational temperature excursions where the instrument might be stored at high or low temperature. See Applications Information section. TEMPERATURE ( °C) –60 – 40 –20 2.4980 2.4985 2.4995 2.5000 2.5005 60 80 100 1461 G01 2.4990 0 20 40 120 2.5010 2.5015 2.5020 TEMPCO –60 °C TO 120°C 3 TYPICAL PARTS 2.5V Reference Voltage vs Temperature TEMPERATURE ( °C) –40 – 20 –4 –2 120 1461 G03 –6 –8 0 40 80 100 20 60 0 –5 –3 –7 –1 SUPPLY ∆ = 15V 5V – 20V 2.5V Line Regulation vs Temperature 2.5V Load Regulation OUTPUT CURRENT (mA) 0.1 800 1200 1600 1 10 100 1461 G02 400 0 125 °C 25 °C –55 °C VIN = 7.5V TYPICAL PERFOR A CE CHARACTERISTICS Characteristic curves are similar for most LT1461s. Curves from the LT1461-2.5 and the LT1461-5 represent the extremes of the voltage options. Characteristic curves for other output voltages fall between these curves and can be estimated based on their output. 2.5V Ripple Rejection Ratio vs Frequency 2.5V Minimum Input/Output Voltage Differential vs Load Current OUTPUT CURRENT (mA) 0.1 0.1 1 10 1 10 100 1461 G04 –55 °C 25 °C 125 °C 2.5V Supply Current vs Input Voltage INPUT VOLTAGE (V) 1000 1461 G05 10 100 525 20 15 10 0 125 °C –55 °C 25 °C FREQUENCY (kHz) 0.01 40 50 60 70 80 0.1 1 100 10 1000 1641 G06 30 20 10 0 90 100 |
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