PRECISION 5.0 VOLT MICROPOWER
VOLTAGE REFERENCE
ISSUE 3 - JANUARY 2003
DEVICE DESCRIPTION
The ZRB500 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 5.0 volts. The device is available
in a small outline surface mount package,
ideal for applications where space saving is
important.
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
µ
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
a nd c urre nts up to 2 00mA. Supe rior
switching capability allows the device to
reach stable operating conditions in only a
few microseconds.
ZRB500
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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Small outline SOT23 style package
No stabilising capacitor required
Typical T
C
15ppm/°C
Typical slope resistance 0.33
Ω
±
3%, 2% and 1% tolerance
Industrial temperature range
Operating current 50
µ
A to 15mA
Transient response, stable in less than
10
µ
s
APPLICATIONS
Battery powered and portable
equipment.
Metering and measurement systems.
Instrumentation.
Test equipment.
Data acquisition systems.
Precision power supplies.
SCHEMATIC DIAGRAM
V
R
G
nd
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
V
R
Reverse Breakdown Voltage
I
R
=150
µ
A
4.95
4.90
4.85
LIMITS
TYP MAX
5.0
5.0
5.0
30
0.05
15
I
R(min)
to
I
R(max)
I
R
= 1mA
f = 100Hz
I
AC
= 0.1 I
R
I
R
= 150
µ
A
f = 10Hz to
10kHz
5.05
5.10
5.15
50
15
50
1
2
3
V
TOL.
%
UNITS
I
MIN
I
R
T
C
†
R
S
§
Z
R
Minimum Operating Current
Recommended Operating
Current
Average Reverse Breakdown
Voltage Temp. Co.
Slope Resistance
Reverse Dynamic Impedance
µ
A
mA
ppm/°C
0.33 1.5
0.4
1
Ω
Ω
E
N
Wideband Noise Voltage
105
µ
V(rms)
†
T
C
=
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
(
I
R
(min)
to I
R
(max)
)
I
R
(max)
−
I
R
(min)
Reverse Current (
µ
A)
(
V
R(max)
−
V
R(min)
)
x
1000000
V
R
x
(
T
(max)
−
T
(min)
)
60
50
40
T
A
=85°C
30
20
10
T
A
=-40°C
0
0
2.0
4.0
6.0
Reverse Voltage (V)
Reverse Characteristics
4-243
stm32/stm8
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