Zetex ZRC250R01, ZRC250R02, ZRC250R03, ZRC250Y01, ZRC250Y02 Datasheet
...
PRECISION 2.5 VOLT LOW KNEE CURRENT
VOLTAGE REFERENCE
ISSUE 3 - MARCH 1998
ZRC250
DEVICE DESCRIPTION
The ZRC250 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 2.5 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 ZRC250 design provides a stable voltage
without an external capacitor and is stable
with capacitive loads. The ZRC250 is
recommended for operation between 20µA
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 and SO8 packages
•
TO92 style packages
•
No stabilising capacitor required
•
Low knee current, 15µA typical
•
Typical TC 30ppm/°C
•
Typical slope resistance 0.4Ω
•
± 3, 2 and 1% tolerance
•
Industrial temperature range
•
Operating current 20µA to 5mA
•
Transient response, stable in less than
•
10µs
Optional extended current range
•
APPLICATIONS
Battery powered and portable
•
equipment.
Instrumentation.
•
Test equipment.
•
V
R
4-247
G
nd
ZRC250
ABSOLUTE MAXIMUM RATING
Reverse Current 25mA
Forward Current 25mA
Operating Temperature -40 to 85°C
Storage Temperature -55 to 125°C
Power Dissipation (T
SOT23 330mW
E-line, 3 pin (TO92) 500mW
E-line, 2 pin (TO92) 500mW
SO8 625mW
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) T
SYMBOL PARAMETER
V
I
I
R
MIN
R
Reverse Breakdown Voltage
Minimum Operating Current 13 20
Recommended Operating
Current
T
† Average Reverse
C
Breakdown Voltage Temp.
Co.
R
§ Slope Resistance 0.4 1
S
Z
R
E
N
Reverse Dynamic Impedance IR =1mA
Wideband Noise Voltage
CONDITIONS LIMITS TOL% UNITS
=150µA
I
R
I
to
R(min)
I
R(max)
f = 100Hz
I
=0.1 I
AC
R
=150µA
I
R
f = 10Hz to
10kHz
=25°C
amb
MIN TYP MAX
2.475
2.45
2.425
0.02 5 mA
=25°C)
amb
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
Ω
60
µV(rms)
V
−
V
†
T
Note: V
=
C
R(max)
(
R(max
V
- V
)
x (
R
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
to
I
§
R
R
=
S
I
R (max
R
(
min
)
I
−
)
R (min
R (max
)
)
)
4-248
A)
µ
rent (
ur
e C
ers
ev
R
40
30
20
10
0
0
1.0 2.0 3.0
Reverse Voltage (V)
Reverse Characteristics
TA=25°C
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