Datasheet LT1461 (Analog Devices) - 4

LT1461
e lecTrical characTerisTics The
l
denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C. VIN – VOUT = 0.5V, Pin 3 = 2.4V, CL = 2µF, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Dropout Voltage VIN – VOUT, VOUT Error = 0.1% IOUT = 0mA 0.06 V IOUT = 1mA l 0.13 0.3 V IOUT = 10mA l 0.20 0.4 V IOUT = 50mA, I and C Grades Only l 1.50 2.0 V Output Current Short VOUT to GND 100 mA Shutdown Pin Logic High Input Voltage l 2.4 V Logic High Input Current, Pin 3 = 2.4V l 2 15 µA Logic Low Input Voltage l 0.5 0.8 V Logic Low Input Current, Pin 3 = 0.8V l 4 µA Supply Current No Load 35 50 µA l 70 µA Shutdown Current RL = 1k 25 35 µA l 55 µA Output Voltage Noise (Note 7) 0.1Hz ≤ f ≤ 10Hz 8 ppmP-P 10Hz ≤ f ≤ 1kHz 9.6 ppmRMS Long-Term Drift of Output Voltage, SO-8 Package (Note 8) See Applications Information 60 ppm/√kHr Thermal Hysteresis (Note 9) ∆T = 0°C to 70°C 40 ppm ∆T = –40°C to 85°C 75 ppm ∆T = –40°C to 125°C 120 ppm
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings air environment to eliminate thermocouple effects on the leads. The test may cause permanent damage to the device. Exposure to any Absolute time is 10 seconds. RMS noise is measured with a single pole highpass Maximum Rating condition for extended periods may affect device filter at 10Hz and a 2-pole lowpass filter at 1kHz. The resulting output is reliability and lifetime. full-wave rectified and then integrated for a fixed period, making the final
Note 2:
The LT1461 is guaranteed functional over the operating reading an average as opposed to RMS. A correction factor of 1.1 is used temperature range of –40°C to 125°C. to convert from average to RMS and a second correction of 0.88 is used to
Note 3:
Output may shift due to thermal hysteresis. Thermal hysteresis correct for the nonideal bandpass of the filters. affects parts during storage as well as operation.
Note 8:
Long-term drift typically has a logarithmic characteristic and
Note 4:
ESD (Electrostatic Discharge) sensitive device. Extensive use of therefore, changes after 1000 hours tend to be much smaller than before ESD protection devices are used internal to the LT1461, however, high that time. Total drift in the second thousand hours is normally less than electrostatic discharge can damage or degrade the device. Use proper ESD one third that of the first thousand hours with a continuing trend toward handling precautions. reduced drift with time. Long-term drift will also be affected by differential stresses between the IC and the board material created during board
Note 5:
Temperature coefficient is calculated from the minimum and assembly. See the Applications Information section. maximum output voltage measured at TMIN, Room and TMAX as follows:
Note 9:
Hysteresis in output voltage is created by package stress TC = (VOMAX – VOMIN)/(TMAX – TMIN) that depends on whether the IC was previously at a higher or lower Incremental slope is also measured at 25°C. temperature. Output voltage is always measured at 25°C, but the IC is
Note 6:
Load regulation is measured on a pulse basis from no load to the cycled hot or cold before successive measurements. Hysteresis is roughly specified load current. Output changes due to die temperature change proportional to the square of the temperature change. Hysteresis is not must be taken into account separately. normally a problem for operational temperature excursions where the
Note 7:
Peak-to-peak noise is measured with a single pole highpass filter instrument might be stored at high or low temperature. See Applications at 0.1Hz and a 2-pole lowpass filter at 10Hz. The unit is enclosed in a still- Information section. 1461fb 4 For more information www.linear.com/LT1461 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Available Options Electrical Characteristics Applications Information Simplified Schematic Package Description Revision History Typical Application Related Parts