ADR391 Datasheet PDF - Analog Devices
| Part Number | ADR391 | |
| Description | Precision Low Drift 2.048 V/2.5 V/4.096 V/ 5.0 V SOT-23 Reference with Shutdown | |
| Manufacturers | Analog Devices | |
| Logo |  |
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a Precision Low Drift 2.048 V/2.5 V/4.096 V/
5.0 V SOT-23 Reference with Shutdown
ADR390/ADR391/ADR392/ADR395
FEATURES
Initial Accuracy: ؎6 mV Max
Low TCVO: 25 ppm/؇C Max
Load Regulation: 60 ppm/mA
Line Regulation: 25 ppm/V
Low Supply Headroom: 0.3 V
Wide Operating Range: (VOUT + 0.3 V) to 15 V
Low Power: 120 A Max
Shutdown to Less Than 3 A Max
Output Current: 5 mA
Wide Temperature Range:
–40؇C to +85؇C for ADR390, ADR391
–40؇C to +125؇C for ADR392, ADR395
Tiny 5-Lead SOT-23 Package
APPLICATIONS
Battery-Powered Instrumentation
Portable Medical Instruments
Data Acquisition Systems
Industrial Process Control Systems
Fault Protection Critical Systems
Automotive
PIN CONFIGURATION
5-Lead SOT-23
(RT Suffix)
SHDN
VIN
VOUT (SENSE)
1 ADR390/ 5
ADR391/
2 ADR392/
ADR395
3 (Not to Scale) 4
GND
VOUT (FORCE)
Part Number
ADR390
ADR391
ADR392
ADR395
Table I. ADR39x Products
Nominal Output Voltage (V)
2.048
2.500
4.096
5.000
GENERAL DESCRIPTION
The ADR390, ADR391, ADR392, and ADR395 are precision
2.048 V, 2.5 V, 4.096 V, and 5 V band gap voltage references
featuring high accuracy and stability and low power consump-
tion in a tiny footprint. Patented temperature drift curvature
correction techniques minimize nonlinearity of the voltage change
with temperature. The wide operating range and low power
consumption with additional shutdown capability make them
ideal for battery-powered applications. The VOUT Sense Pin
enables greater accuracy by supporting full Kelvin operation in
PCBs employing thin or long traces.
The ADR390, ADR391, ADR392, and ADR395 are micropower,
low dropout voltage (LDV) devices that provide a stable output
voltage from supplies as low as 300 mV above the output voltage.
ADR390 and ADR391 are specified over the industrial range
(–40∞C to +85∞C), while ADR392 and ADR395 are specified
over the extended industrial range (–40∞C to +125∞C). Each is
available in the tiny 5-lead SOT-23 package.
The combination of VOUT sense and shutdown functions also
enables a number of unique applications combining precision
reference/regulation with fault decision and overcurrent protec-
tion. Details are provided in the Applications section.
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
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ADR390/ADR391/ADR392/ADR395
PARAMETER DEFINITION
Temperature Coefficient (TCVO)
The change of output voltage over the operating temperature
change and normalized by the output voltage at 25∞C, expressed
in ppm/∞C. The equation follows:
[ ] ( ( )) ( ( ) )where:
VO T2 -VO T1
TCVO ppm ∞C =
¥ 106
VO 25∞C ¥ T2 - T1
VO(25∞C) = VO at 25∞C
VO(T1) = VO at temperature1
VO(T2) = VO at temperature2
Line Regulation (⌬VO/⌬VIN)
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 (⌬VO/⌬ILOAD)
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 W of dc output resistance.
Input Capacitor
Input capacitors are not required on the ADR39x. There is no
limit for the value of the capacitor used on the input, but a 1 mF
to 10 mF capacitor on the input will improve transient response
in applications where the supply suddenly changes. An additional
0.1 mF in parallel will also help in reducing noise from the supply.
Output Capacitor
The ADR39x does not need output capacitors for stability under
any load condition. An output capacitor, typically 0.1 mF, will
filter out any low level noise voltage and will not affect the
operation of the part. On the other hand, the load transient
response can be improved with an additional 1 mF to 10 mF
output capacitor in parallel. A capacitor here will act as a source
of stored energy for a sudden increase in load current. The only
parameter that will degrade, by adding an output capacitor, is
turn-on time and it depends on the size of the capacitor chosen.
Long-Term Stability
Typical shift in output voltage over 1000 hours at a controlled
temperature. Figure 1 shows a sample of parts measured at differ-
ent intervals in a controlled environment of 50∞C for 1000 hours.
( ) ( )DVO =VO t0 -VO t1
[ ] ( ) ( ) ( )DVO
ppm
= VO
t0 -VO
VO t0
t1
¥ 106
where:
VO(t0) = VO at time 0
VO(t1) = VO after 1000 hours operation at a controlled
temperature
Thermal Hysteresis (VO_HYS)
The change of output voltage after the device is cycled through
temperature from +25∞C to –40∞C to +85∞C and back to
+25∞C. This is a typical value from a sample of parts put
through such a cycle.
( )VO _ HYS = VO 25∞C - VO _TC
where:
[ ] ( ( ) )VO _ HYS
ppm
= VO
25∞C - VO _TC
VO 25∞C
¥ 106
VO(25∞C) = VO at 25∞C
VO_TC = VO at 25∞C after temperature cycle at +25∞C to
–40∞C to +85∞C and back to +25∞C
200
DATA TAKEN IN CONTROLLED
ENVIRONMENT @ 50؇C ؎ 1؇C
150
100
50
0
؊50
؊100
؊150
0
86 176 250 324 440 640 840 1040
TIME – Hours
Figure 1. ADR391 Typical Long-Term Drift over 1000 Hours
REV. C
–5–
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ADR391 electronic component. |
| Information | Total 17 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ADR391.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| ADR390 | The function is Precision Low Drift 2.048 V/2.5 V/4.096 V/ 5.0 V SOT-23 Reference with Shutdown. Analog Devices | |
| ADR391 | The function is Precision Low Drift 2.048 V/2.5 V/4.096 V/ 5.0 V SOT-23 Reference with Shutdown. Analog Devices | |
| ADR392 | The function is Precision Low Drift 2.048 V/2.5 V/4.096 V/ 5.0 V SOT-23 Reference with Shutdown. Analog Devices | |
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