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HCPL-7800A Datasheet(PDF) 8 Page - Agilent(Hewlett-Packard) |
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HCPL-7800A Datasheet(HTML) 8 Page - Agilent(Hewlett-Packard) |
8 / 17 page 1-223 Notes: General Note: Typical values represent the mean value of all characterization units at the nominal operating conditions. Typical drift specifications are determined by calculating the rate of change of the speci- fied parameter versus the drift parameter (at nominal operating conditions) for each characterization unit, and then averaging the individual unit rates. The correspond- ing drift figures are normalized to the nominal operating conditions and show how much drift occurs as the particular drift parameter is varied from its nominal value, with all other parameters held at their nominal operating values. Figures show the mean drift of all characterization units as a group, as well as the ± 2-sigma statistical limits. Note that the typical drift specifications in the tables below may differ from the slopes of the mean curves shown in the corresponding figures. 1. HP recommends the use of non- chlorine activated fluxes. 2. The HCPL-7800 will operate properly at ambient temperatures up to 100 °C but may not meet published specifi- cations under these conditions. 3. DC performance can be best maintained by keeping VDD1 and VDD2 as close as possible to 5 V. See application section for circuit recommendations. 4. HP recommends operation with VIN- = 0 V (tied to GND1). Limiting VIN+ to 100 mV will improve DC nonlinearity and nonlinearity drift. If VIN- is brought above 800 mV with respect to GND1, an internal test mode may be activated. This test mode is not intended for customer use. 5. Although, statistically, the average difference in the output resistance of pins 6 and 7 is near zero, the standard deviation of the difference is 1.3 Ω due to normal process variations. Consequently, keeping the output current below 1 mA will ensure the best offset performance. 6. Data sheet value is the average change in offset voltage versus temperature at TA =25°C, with all other parameters held constant. This value is expressed as the change in offset voltage per °C change in temperature. 7. Data sheet value is the average magnitude of the change in offset voltage versus temperature at TA =25°C, with all other parameters held constant. This value is expressed as the change in magnitude per °C change in temperature. 8. Data sheet value is the average change in offset voltage versus input supply voltage at VDD1 = 5 V, with all other parameters held constant. This value is expressed as the change in offset voltage per volt change of the input supply voltage. 9. Data sheet value is the average change in offset voltage versus output supply voltage at VDD2 = 5 V, with all other parameters held constant. This value is expressed as the change in offset voltage per volt change of the output supply voltage. 10. Gain is defined as the slope of the best-fit line of differential output voltage (VOUT+ - VOUT-) versus differential input voltage (VIN+ -VIN-) over the specified input range. 11. Data sheet value is the average change in gain versus temperature at TA =25°C, with all other parameters held constant. This value is expressed as the percentage change in gain per °C change in temperature. 12. Data sheet value is the average magnitude of the change in gain versus temperature at TA =25°C, with all other parameters held constant. This value is expressed as the percentage change in magnitude per °C change in temperature. 13. Data sheet value is the average change in gain versus input supply voltage at VDD1 = 5 V, with all other parameters held constant. This value is expressed as the percentage change in gain per volt change of the input supply voltage. 14. Data sheet value is the average change in gain versus output supply voltage at VDD2 = 5 V, with all other parameters held constant. This value is expressed as the percentage change in gain per volt change of the output supply voltage. 15. Nonlinearity is defined as the maxi- mum deviation of the output voltage from the best-fit gain line (see Note 10), expressed as a percentage of the full-scale differential output voltage range. For example, an input range of ± 200 mV generates a full-scale differ- ential output range of 3.2 V ( ± 1.6 V); a maximum output deviation of 6.4 mV would therefore correspond to a nonlinearity of 0.2%. 16. Data sheet value is the average change in nonlinearity versus temperature at TA =25°C, with all other parameters held constant. This value is expressed as the number of percentage points that the nonlinearity will change per °C change in temperature. For example, if the temperature is increased from 25 °C to 35°C, the nonlinearity typically will decrease by 0.01 percentage points (10 °C times -0.001 % pts/ °C) from 0.2% to 0.19%. 17. Data sheet value is the average change in nonlinearity versus input supply voltage at VDD1 = 5 V, with all other parameters held constant. This value is expressed as the number of percentage points that the nonlinearity will change per volt change of the input supply voltage. 18. Data sheet value is the average change in nonlinearity versus output supply voltage at VDD2 = 5 V, with all other parameters held constant. This value is expressed as the number of percentage points that the nonlinearity will change per volt change of the output supply voltage. 19. NL100 is the nonlinearity specified over an input voltage range of ± 100 mV. 20. Because of the switched-capacitor nature of the input sigma-delta converter, time-averaged values are shown. 21. This parameter is defined as the ratio of the differential signal gain (signal applied differentially between pins 2 and 3) to the common-mode gain (input pins tied together and the signal applied to both inputs at the same time), expressed in dB. 22. When the differential input signal exceeds approximately 300 mV, the outputs will limit at the typical values shown. 23. The maximum specified input supply current occurs when the differential input voltage (VIN+ - VIN-) = 0 V. The input supply current decreases approximately 1.3 mA per 1 V decrease in VDD1. 24. The maximum specified output supply current occurs when the differential input voltage (VIN+ -VIN-) = 200 mV, the maximum recommended operating input voltage. However, the output supply current will continue to rise for differential input voltages up to approximately 300 mV, beyond which the output supply current remains constant. |
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