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LM4050WG2.5RLQV Datasheet(PDF) 10 Page - Texas Instruments

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Part # LM4050WG2.5RLQV
Description  Precision Micropower Shunt Voltage Reference
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM4050WG2.5RLQV Datasheet(HTML) 10 Page - Texas Instruments

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LM4050QML
SNVS627G – JUNE 2010 – REVISED JULY 2013
www.ti.com
Functional Block Diagram
APPLICATIONS INFORMATION
The LM4050QML is a precision micro-power curvature-corrected bandgap shunt voltage reference. The
LM4050QML is available in the 10-Lead Ceramic CLGA package. The LM4050QML has been designed for
stable operation without the need of an external capacitor connected between the “+” pin and the “
−” pin. If,
however, a bypass capacitor is used, the LM4050QML remains stable. The LM4050-2.5QML has a 60
μA
minimum and 15 mA maximum operating current. The LM4050-5.0QML has a 74
μA minimum and 15 mA
maximum operating current.
The typical thermal hysteresis specification is defined as the change in +25°C voltage measured after thermal
cycling. The device is thermal cycled to temperature -55°C and then measured at 25°C. Next the device is
thermal cycled to temperature +125°C and again measured at 25°C. The resulting VOUT delta shift between the
25°C measurements is thermal hysteresis. Thermal hysteresis is common in precision references and is induced
by thermal-mechanical package stress. Changes in environmental storage temperature, operating temperature
and board mounting temperature are all factors that can contribute to thermal hysteresis.
In a conventional shunt regulator application (Figure 12) , an external series resistor (RS) is connected between
the supply voltage and the LM4050QML. RS determines the current that flows through the load (IL) and the
LM4050QML (IQ). Since load current and supply voltage may vary, RS should be small enough to supply at least
the maximum ensured IRMIN (spec. table) to the LM4050QML even when the supply voltage is at its minimum and
the load current is at its maximum value. When the supply voltage is at its maximum and IL is at its minimum, RS
should be large enough so that the current flowing through the LM4050QML is less than 15 mA.
RS is determined by the supply voltage, (VS), the load and operating current, (IL and IQ), and the LM4050QML's
reverse breakdown voltage, VR.
(1)
Radiation Environments
Careful consideration should be given to environmental conditions when using a product in a radiation
environment.
TOTAL IONIZING DOSE
Radiation hardness assured (RHA) products are those part numbers with a total ionizing dose (TID) level
specified in the Ordering Information table on the front page. Testing and qualification of these products is done
on a wafer level according to MIL-STD-883, Test Method 1019. Wafer level TID data is available with lot
shipments.
Testing and qualification is performed at the 30, 50 and 100 krad TID levels at a dose rate of 10 mrad/s, using a
1.5X overtest at each TID level. For the 30 krad level units are tested to 50 krad, for 50 krad units are tested to
80 krad and for 100 krad units are tested to 150 krad, with all parameters remaining inside the post irradiation
test limits.
10
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Product Folder Links: LM4050QML


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