PRECISION 3.3 VOLT LOW KNEE
CURRENT VOLTAGE REFERENCE
ISSUE 2 - FEBRUARY 1997
DEVICE DESCRIPTION
The ZRC330 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 3.3 volts. The device is available
in small outline surface mount packages, ideal
for applications where space saving is
important.
The ZRC330 design provides a stable voltage
without an external capacitor and is stable with
capacitive loads. The ZRC330 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 a
suggested 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
ZRC330
•
•
•
•
•
•
•
•
•
•
•
•
•
No stabilising capacitor required
Low knee current, 15µA typical
Typical slope resistance 0.6Ω
±
3%, 2% and 1% tolerance
Industrial temperature range
Operating current 20µA to 5mA
Battery powered and portable equipment.
Metering and measurement systems.
Instrumentation.
Test equipment.
Data acquisition systems.
Precision power supplies.
Crystal oscillators
APPLICATIONS
•
Small outline SOT23, SO8 and TO92
style packages
SCHEMATIC DIAGRAM
V
R
G
nd
1 - 42
ZRC330
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
E-Line, 3 pin (TO92)
500mW
E-Line, 2 pin (TO92)
500mW
SO8
625mW
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) T
amb
=25°C
SYMBOL PARAMETER
CONDITIONS
MIN
V
R
Reverse Breakdown Voltage
I
R
=150µA
3.27
3.234
3.2
LIMITS
TYP MAX
3.3
3.3
3.3
15
0.02
I
R(min)
to
I
R(max)
I
R
= 1mA
f = 100Hz
I
AC
= 0.1 I
R
I
R
= 150µA
f = 10Hz to
10kHZ
40
TOL.%
UNITS
3.33
3.366
3.4
20
5
1
2
3
V
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
µA
mA
ppm/°C
Ω
Ω
15
0.6
0.5
50
2
1.2
E
N
Wideband Noise Voltage
43
µV(rms)
V
R
x Temperature Change
Reverse Current (µA)
T
C
=
V
R
Change
x
1000000
30
V
R
Change
(I
R
(min)
to I
R
(
max))
§
R
S
=
I
R
(
max
)
−
I
R
(
min)
20
T
)
=85°C
10
T
)
=-40°C
T
)
=25°C
0
0
2.0
4.0
Reverse Voltage (V)
Reverse Characteristics
1 - 43
ZRC330
CONNECTION DIAGRAMS
E-Line, 2 pin Package Suffix Y
E-Line, 3 pin,Rev Package Suffix R
Bottom View
Bottom View
Pin 3 floating or connected to pin 1
E-Line, 3 pin Package Suffix A
SO8 Package Suffix N8
Bottom View
Pin 1 floating or connected to pin 3
Top View
SOT23 Package Suffix F
Top View
Pin 1 floating or connected to pin 2
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