
Part Name  Description  Manufacturer 
AD1584C  2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References  Analog Devices 
AD1584C Datasheet PDF : 16 Pages

AD1582/AD1583/AD1584/AD1585
PARAMETER DEFINITIONS
Temperature Coefficient (TCVO)
The change of output voltage over the operating temperature
change and normalized by the output voltage at 25ЊC, expressed
in ppm/ЊC. The equation follows:
where:
TCVO[ppm /°C
]
=
VO(T2 ) − VO(T1)
VO(25°C) × (T2 − T1)
× 106
VO(25ЊC) = VO at 25ЊC
VO(T1) = VO at temperature 1
VO(T2) = VO at temperature 2
Line Regulation (∆VO/∆VIN)
The change in output voltage due to a specified change in input
voltage. It includes the effects of selfheating. Line regulation is
expressed in either percent per volt, parts per million per volt, or
microvolts per volt change in input voltage.
Load Regulation (∆VO/∆ILOAD)
The change in output voltage due to a specified change in load
current. It includes the effects of selfheating. Load regulation is
expressed in either microvolts per milliampere, parts per million
per milliampere, or Ω of dc output resistance.
LongTerm Stability (∆VO)
Typical shift of output voltage at 25ЊC on a sample of parts
subjected to an operation life test of 1000 hours at 125ЊC:
where:
∆VO = (VO t0 ) − VO(t1)
∆VO[ppm]
=
VO(t0 ) − VO(t1)
VO(t0 )
×
106
VO(t0) = VO at 25ЊC at time 0
VO(t1) = VO at 25ЊC after 1000 hours operation at 125ЊC
Thermal Hysteresis (VO_HYS)
The change of output voltage after the device is cycled through
temperatures from +25ЊC to –40ЊC to +85°C and back to +25ЊC.
This is a typical value from a sample of parts put through such
a cycle:
where:
( ) VO_HYS = VO 25°C − VO_TC
[ ] VO_HYS ppm =
VO(25°C) − VO_TC
VO(25°C)
× 106
VO(25ЊC) = VO at 25ЊC
VO_TC = VO at 25ЊC after temperature cycle at +25ЊC to
–40ЊC to +85ЊC and back to +25ЊC
Operating Temperature
The temperature extremes at which the device can still function.
Parts may deviate from their specified performance outside the
specified temperature range.
REV. D
–7–

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