A Product Line of
Diodes Incorporated
ZR285
PRECISION 2.5V MICROPOWER VOLTAGE REFERNCE
Description
The ZR285 uses a bandgap circuit design to achieve a
precision micropower voltage reference of 2.5 volts. The
device is available in a small outline surface mount package,
ideal for applications where space saving is important.
The ZR285 design provides a stable voltage without an
external capacitor and is stable with capacitive loads. The
ZR285 is recommended for operation between 20μA and
20mA and so is ideally suited to low power and battery
powered applications.
Excellent performance is maintained to an absolute
maximum of 30mA, however the rugged design and 20 volt
processing allows the reference to withstand transient
effects and currents up to 200mA. Superior switching
capability allows the device to reach stable operating
conditions in only a few microseconds.
Pin Assignment
(Top View)
Pin 1 floating or connected to pin 2
Features
•
•
•
•
•
•
•
•
Small outline SOT23 style package
No stabilizing capacitor required
Low knee current, 15μA typical
Typical T
C
30ppm/°C
Typical slope resistance 0.4Ω
± 2% tolerance
Industrial temperature range
Operating current 20μA to 20mA
Typical Application Circuit
Applications
•
•
•
•
•
•
Battery powered and portable equipment
Metering and measurement systems
Instrumentation
Test equipment
Data acquisition systems
Precision power supplies
ZR285
Document number: DS32168 Rev. 8 - 2
1 of 5
www.diodes.com
May 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZR285
Absolute Maximum Ratings
(Voltages to GND Unless Otherwise Stated)
Parameter
Reverse Current
Forward Current
Operating Temperature
Storage Temperature
Power Dissipation (T
AMB
= 25°C)
SOT23
Rating
30
25
-40 to 85
-55 to 150
330
Unit
mA
mA
°C
°C
mW
Electrical Characteristics
Symbol
V
R
I
MIN
I
R
T
C
(*)
(†)
(Test conditions: Tamb = 25°C, unless otherwise specified.)
Parameter
Reverse breakdown voltage
Minimum operating current
Recommended operating current
Average reverse breakdown voltage
temperature coefficient
Slope resistance
Reverse dynamic impedance
Condition
I
R
= 150µA
Min.
2.45
0.02
Typ.
2.5
13
30
0.4
0.3
Max.
2.55
20
20
90
1
0.8
Tol. (%)
2
Unit
V
µA
mA
ppm/°C
Ω
Ω
R
S
Z
R
I
R
= 1mA to
20mA
I
R
= 1mA
f = 100Hz
I
AC
= 0.1I
R
I
R
= 150µA
f = 10Hz to
10kHz
E
N
Notes:
(*)
Wideband noise voltage
60
µV(rms)
T
C
=
(V
R(MAX)
– V
R(MIN)
) x 1000000
V
R
x (T
(MAX)
– T
(MIN)
)
Note: V
R(MAX)
- V
R
(MIN)
is the maximum deviation in reference
voltage measured over the full operating temperature range.
(†)
R
S
=
V
R
Change (
IR(MIN)
to I
R(MAX
)
)
I
R(MAX)
– I
R(MIN)
)
.
ZR285
Document number: DS32168 Rev. 8 - 2
2 of 5
www.diodes.com
May 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZR285
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
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application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
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LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the
express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause
the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems,
and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-
related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and
its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or
systems.
Copyright © 2010, Diodes Incorporated
www.diodes.com
ZR285
Document number: DS32168 Rev. 8 - 2
5 of 5
www.diodes.com
May 2010
© Diodes Incorporated
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