Zetex (Now Diodes) ZR25D, ZR25D01, ZR25D02 Schematic [ru]
PRECISION 2.5 VOLT MICROPOWER
VOLTAGE REFERENCE
ISSUE 2 - FEBRUARY 1998
ZR25D
DEVICE DESCRIPTION
The ZR25D uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 2.5 volts. The device is available
in a small outline SOT23 surface mount
package, ideal for applications where space
saving is important.
The ZR25D design provides a stable voltage
without an external capacitor and is stable
with capacitive loads. The ZR25D is
recommended for operation between 50µA
and 5mA 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.
SCHEMATIC DIAGRAM
FEATURES
Small outline SOT23 package.
•
No stabilising capacitor required
•
Typical TC 30ppm/°C
•
Typical slope resistance 0.4Ω
•
± 3%, 2% and 1% tolerance
•
Industrial temperature range
•
Operating current 50µA to 5mA
•
Transient response, stable in less than
•
10µs
Alternative package options available
•
APPLICATIONS
Battery powered and portable
•
equipment.
Metering and measurement systems.
•
Instrumentation.
•
Test equipment.
•
Data acquisition systems.
•
Precision power supplies.
•
V
R
G
nd
4-161
ZR25D
ABSOLUTE MAXIMUM RATING
Reverse Current 25mA
Forward Current 25mA
Power Dissipation (T
SOT23 330mW
Operating Temperature -40 to 85°C
Storage Temperature -55 to 125°C
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) T
SYMBOL PARAMETER
V
I
I
R
MIN
R
Reverse Breakdown Voltage
Minimum Operating Current 25 50
Recommended Operating
Current
T
† Average Reverse Breakdown
C
Voltage Temp. Co. I
R
§ Slope Resistance 0.4 2
S
Z
R
E
N
Reverse Dynamic Impedance IR = 1mA
Wideband Noise Voltage
CONDITIONS LIMITS TOL.
=150µA
I
R
to
R(min)
I
R(max)
f = 100Hz
I
=0.1 I
AC
R
= 150µA
I
R
f = 100Hz to
10kHz
=25°C
amb
MIN TYP MAX
2.475
2.45
2.425
0.05 5 mA
=25°C)
amb
UNITS
%
2.5
2.525
1
V
2.5
2.55
2
2.5
2.575
3
µA
30 90 ppm/°C
Ω
0.3 0.8
45
Ω
µV(rms)
V
−
V
†
T
Note: V
=
C
R(max)
(
R
(
max
)
V
x (
R
- V
R(min)
) x 1000000
R
(
min
)
T
−
T
(
max
)
)
(
min
)
is the maximum
deviation in reference voltage measured
over the full operating temperature
range.
V
Change
(
I
(
§
R
R
=
S
I
min) to I
R
(
max
) −
R
(
max
R
I
(
min
)
R
60
)
50
A
µ
(
t
40
urren
30
e C
20
))
evers
R
10
0
0.2 0.6
1.0 1.8 2.61.4 2.2
°C
=85
A
T
°C
=25
A
T
-40°C
=
A
T
Reverse Voltage (V)
Reverse Characteristics
4-162
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