ADR420BRZ Analog Devices Inc, ADR420BRZ Datasheet - Page 15
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ADR420BRZ
Manufacturer Part Number
ADR420BRZ
Description
IC VREF PREC 2.048V 10MA 8SOIC
Manufacturer
Analog Devices Inc
Series
XFET®r
Datasheet
1.ADR425ARZ.pdf
(24 pages)
Specifications of ADR420BRZ
Temperature Coefficient
3ppm/°C
Design Resources
High Accuracy, Bipolar Voltage Output Digital-to-Analog Conversion Using AD5765 (CN0073) High Accuracy, Bipolar Voltage Output Digital-to-Analog Conversion Using AD5763 (CN0074)
Reference Type
Series
Voltage - Output
2.048V
Tolerance
±0.05%
Voltage - Input
4 ~ 18 V
Number Of Channels
1
Current - Quiescent
500µA
Current - Output
10mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Topology
Series
Input Voltage
4V To 18V
Reference Voltage
2.048V
Reference Voltage Tolerance
1mV
Voltage Reference Case Style
SOIC
No. Of Pins
8
Fixed / Adjust / Prog
Precision
Output Voltage (max)
2.048V
Reference Voltage Accuracy (max)
0.05
Line Regulation
35ppm/V
Load Regulation
70ppm/mA
Input Voltage (max)
18V
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Mounting
Surface Mount
Pin Count
8
Package Type
SOIC N
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Cathode
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ADR420BRZ
Manufacturer:
ADI
Quantity:
205
Part Number:
ADR420BRZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
ADR420BRZ-REEL7
Manufacturer:
NS
Quantity:
6 234
TERMINOLOGY
Temperature Coefficient
The change of output voltage over the operating temperature
range is normalized by the output voltage at 25°C, and
expressed in ppm/°C as
where:
V
V
V
Line Regulation
The change in output voltage due to a specified change in input
voltage. It includes the effects of self-heating. Line regulation is
expressed in either percent per volt, parts per million per volt,
or microvolts per volt change in input voltage.
Load Regulation
The change in output voltage due to a specified change in load
current. It includes the effects of self-heating. Load regulation is
expressed in either microvolts per milliampere, parts per
million per milliampere, or ohms of dc output resistance.
Long-Term Stability
Typical shift of output voltage at 25°C on a sample of parts
subjected to operation life test of 1000 hours at 125°C.
where:
V
V
OUT
OUT
OUT
OUT
OUT
TCV
(25°C) = V
(T
(T
Δ
Δ
(t
(t
V
V
0
1
1
2
) = V
) = V
) = V
) = V
OUT
OUT
OUT
(
OUT
OUT
=
ppm
(
OUT
OUT
ppm
V
OUT
at 25°C at Time 0.
at 25°C after 1000 hours operation at 125°C.
OUT
at Temperature 1.
at Temperature 2.
)
/
=
at 25°C.
°
( )
t
C
V
0
)
OUT
=
−
V
V
( )
V
t
V
OUT
OUT
0
OUT
OUT
−
(
( )
( )
t
25
V
( )
t
T
1
0
OUT
2
°
C
−
)
( )
×
t
V
1
(
OUT
T
×
2
10
( )
−
T
1
T
6
1
)
×
10
6
Rev. H | Page 15 of 24
Thermal Hysteresis
The change of output voltage after the device is cycled through
temperatures from +25°C to −40°C to +125°C and back to
+25°C. This is a typical value from a sample of parts put
through such a cycle.
where:
V
V
−40°C to +125°C and back to +25°C.
Input Capacitor
Input capacitors are not required on the ADR42x. There is
no limit for the value of the capacitor used on the input, but a
1 μF to 10 μF capacitor on the input improves transient response
in applications where the supply suddenly changes. An addi-
tional 0.1 μF capacitor in parallel also helps to reduce noise
from the supply.
Output Capacitor
The ADR42x do not need output capacitors for stability under
any load condition. An output capacitor, typically 0.1 μF, filters
out any low level noise voltage and does not affect the operation
of the part. On the other hand, the load transient response can
be improved with an additional 1 μF to 10 μF output capacitor
in parallel. A capacitor here acts as a source of stored energy for
sudden increase in load current. The only parameter that
degrades by adding an output capacitor is the turn-on time,
which depends on the size of the selected capacitor.
OUT
OUT_TC
V
V
(25°C) = V
OUT
OUT
= V
_
_
ADR420/ADR421/ADR423/ADR425
OUT
HYS
HYS
(
at 25 °C after temperature cycle at +25°C to
=
ppm
OUT
V
OUT
at 25°C.
)
=
(
25
V
OUT
°
C
)
(
V
−
25
OUT
V
°
C
OUT
(
)
25
−
_
°
TC
V
C
OUT
)
_
TC
×
10
6