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Diodes Incorporated
PRECISION 3.3VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
ZRC330
Description
The ZRC330 uses a bandgap circuit design to achieve a
precision micropower voltage reference of 3.3 volts. The
device is available in a small outline surface mount
package, 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 bet ween 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 v olt
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
• Small outline SOT23 package
• No stabilizing capacitor required
• Low knee current, 15A typical
• Typical slope resistance 0.6
• ± 3%, ± 2% and 1% tolerance
• Industrial temperature range
• Operating current 20A to 5mA
• Green molding compound (No Br, Sb)
Pin Assignments
SOT23 Package Suffix – F
V
GND
Pin 1 floating or connected to pin 2
3
R
2
(Top View)
Typical Application Circuit
-
+
1
Applications
• Battery powered and portable equipment.
• Metering and measurement systems
• Instrumentation
• Test equipment
• Data acquisition systems
• Precision power supplies
• Crystal oscillators
ZRC330
Document number: DS32163 Rev. 7 - 2
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Diodes Incorporated
ZRC330
PRECISION 3.3VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
Absolute Maximum Ratings
Parameter Rating Unit
Reverse Current 25 mA
Forward Current 25 mA
Operating Temperature -40 to 85 °C
Storage Temperature -55 to 125 °C
Power Dissipation (T
SOT23
Electrical Characteristics (Test conditions: T
Symbol Parameter Condition Min. Typ. Max. Tol. (%) Unit
VR
I
MIN
IR
T
C
R
S
ZR
EN
Note:
(*)
T
Note: V
voltage measured over the full operating temperature range
(†)
R
Reverse breakdown voltage
Minimum operating current 15 20
Recommended operating current 0.02 5
Average reverse breakdown voltage
(*)
temperature coefficient
(†)
Slope resistance 0.6 2
Reverse dynamic impedance
Wideband noise voltage
=
C
S
R(MAX)
V
=
V
– V
R(MIN)
Change
= 25°C)
AMB
330 mW
AMB
IR = 150µA
to
I
R(MIN)
I
R(MAX)
IR = 1mA
f = 100Hz
= 0.1IR
I
AC
I
= 150µA
R
f = 10Hz to
10kHz
−
VV
()
x
I
1000000x
)MIN(R)MAX(R
TT
−
is the maximum deviation in reference
to
I
−
II
)MIN(R)MAX(R
)MIN()MAX(R
)MAX(R)MIN(RR
= 25°C, unless otherwise specified.)
3.27
3.234
3.201
15 50
0.5 1.2
75
40
30
20
3.3
3.3
3.3
3.33
3.366
3.399
T = 85°C
A
1
2
3
ppm/°C
µV(rms)
V
µA
mA
Reverse Current (µA)
10
0
ZRC330
Document number: DS32163 Rev. 7 - 2
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T = 25°C
A
2.0 4.00.0
Reverse Voltage ( V)
T = -40°C
A
March 2012
© Diodes Incorporated
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R
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FEREN
C
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TAG
SLO
PE RESIS
A
C
PRECISION 3.3VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
Typical Characteristics
1.6
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Diodes Incorporated
ZRC330
9.31
1.4
E (V)
1.2
L
1.0
D V
WA
0.8
0.6
0.4
0.1 1 10 100 1000
FORWARD CURRENT (mA)
Forwa r d Characteristics
3.0
Ω
2.0
T = 25°C
A
T = -40°C
A
1.0
SLOPE RESISTANCE ( )
E (V)
L
E V
9.30
I = 150µA to 5mA
R
E
9.29
20-40 -20 0 40 60 80
TEMPERATURE (°C)
Temperat ur e Drift
1000
I = 150µA
R
100
Ω
E ( )
I = 1mA
N
T
10
R
I = 5mA
R
1
T = 85°C
0
0.1 1 10
REFERENCE CURRENT (mA)
Slope Resista nc e vs . Curre nt
3.0
5mA
2.0
1.0
0
10
IN R
V (V) V (V)
0
0100200300
Tran si ent R esponse
ZRC330
Document number: DS32163 Rev. 7 - 2
A
150µA
1K3
5mA
INPUT
TIME (µs)
(Single P ulse)
43K
150µA
OUTPUT
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0.1
0.01 100
0.1 1 10
FREQUENCY (KHz)
Slope Resistance vs. Frequency
3.0
2.0
5mA
150µA 43K
1K3
5mA
INPUT
150µA
OUTPUT
1.0
0
10
IN R
V (V) V (V)
0
01 34
2
TIME (µs)
Tran sient Respons e
(Repetitive Pulse)
© Diodes Incorporated
March 2012
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ZRC330
PRECISION 3.3VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
Ordering Information*
Part No.
ZRC330F01TA 1 SOT23 33C 7 3000 8
ZRC330F02TA 2 SOT23 33B 7 3000 8
ZRC330F03TA 3 SOT23 33A 7 3000 8
Notes: * All ZRC330A variants (E-Line) are obsolete and no longer available for sale. The closest alternative is the SOT23.
Tol
(%)
Package Device Mark
Package Outline Dimensions
SOT23
A
C
B
K
J
H
K1
F
D
G
L
M
Suggested Pad Layout
SOT23
Y
Z
X
E
C
Reel Size
(inches)
Dim Min Max Typ
Dimensions Value (in mm)
Quantity
A 0.37 0.51 0.40
B 1.20 1.40 1.30
C 2.30 2.50 2.40
D 0.89 1.03 0.915
F 0.45 0.60 0.535
G 1.78 2.05 1.83
H 2.80 3.00 2.90
J 0.013 0.10 0.05
K 0.903 1.10 1.00
K1 - - 0.400
L 0.45 0.61 0.55
M 0.085 0.18 0.11
0° 8° -
α
All Dimensions in mm
Z 2.9
X 0.8
Y 0.9
C
E
per reel
SOT23
2.0
1.35
Tape Width
(mm)
ZRC330
Document number: DS32163 Rev. 7 - 2
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ZRC330
PRECISION 3.3VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall
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Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales
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and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of,
directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
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Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the
express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause
the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems,
and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their
products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or
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Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life
support devices or systems.
Copyright © 2012, Diodes Incorporated
IMPORTANT NOTICE
LIFE SUPPORT
www.diodes.com
ZRC330
Document number: DS32163 Rev. 7 - 2
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