ZRB500
Precision 5V micropower voltage reference
Description
The ZRB500 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 5.0 volts. The device is available in
small outline surface mount packages, ideal for
applications where space saving is important,
as well as packages for through hole
requirements.
The ZRB500 design provides a stable voltage
without an external capacitor and is stable with
capacitive loads. The ZRB500 is recommended
for operation between 50 A and 15mA and so
is ideally suited to low power and battery
powered applications.
Excellent performance is maintained to an
absolute maximum of 25mA, 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.
Features
•
•
•
•
•
•
± 3%, 2% and 1% tolerance
Operating current 50 A to 15mA
Typical T
C
15ppm/°C
Transient response, stable in less than 10 s
Industrial temperature range
Small outline SOT23 and TO92 style
packages
Applications
•
•
•
•
•
•
Battery powered and portable equipment
Metering and measurement systems
Instrumentation
Test equipment
Data acquisition systems
Precision power supplies
Typical application circuit
V
R
-
+
Gnd
Issue 5 - May 2006
© Zetex Semiconductors plc 2006
1
www.zetex.com
ZRB500
Absolute maximum rating
Reverse current
Forward current
Operating temperature
Storage temperature
25mA
25mA
-40 to 85°C
-55 to 125°C
Power dissipation (T
amb
= 25°C)
SOT23
330mW
Electrical characteristics. Test conditions (unless otherwise stated) T
amb
= 25°C
Symbol Parameter
Conditions
Min.
4.95
V
R
I
MIN
I
R
T
C (*)
Reverse breakdown voltage I
R
= 150 A
Minimum operating current
Recommended operating
current
Average reverse breakdown
voltage temperature
I
R(min)
to
coefficient
I
R(max)
Slope resistance
Reverse dynamic
impedence
Wideband noise voltage
I
R
= 1mA
f = 100Hz
I
AC
= 0.1I
R
I
R
= 150 A
f = 10Hz to
10kHz
0.05
15
4.90
4.85
Limits
Typ.
5.0
5.0
5.0
30
Max.
5.05
5.10
5.15
50
15
50
Tol.
(%)
1
2
3
Units
V
V
V
A
mA
ppm/°C
R
S (†)
Z
R
0.33
0.4
1.5
1
E
N
105
V(rms)
NOTES:
(*)
(
V
R
(
max
)
–
V
R
(
min
)
) ×
1000000
Reverse Current (
µ
A)
-
T
C
=
----------------------------------------------------------------------------------
V
R
× (
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.
60
50
40
T
A
=85°C
30
20
10
T
A
=-40°C
0
0
2.0
4.0
6.0
(†)
V
R
Change
(
I
R
(
min
)
to I
R
(
max
)
)
-
R
S
= --------------------------------------------------------------------------------
I
R
(
max
)
–
I
R
(
min
)
Reverse Voltage (V)
Reverse Characteristics
Issue 5 - May 2006
© Zetex Semiconductors plc 2006
4
www.zetex.com
Embedded System
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