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PRECISION 3.3 VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
ISSUE 5 - JANUARY 2003 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 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 between 20A 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 an d cu rrents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds.
ZRC330
FEATURES
* * * * * * * * * * * * * *
Small outline SOT23 and TO92 style packages No stabilising 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
APPLICATIONS
Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Test equipment. Data acquisition systems. Precision power supplies. Crystal oscillators
SCHEMATIC DIAGRAM
V
R
G nd
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ZRC330
ABSOLUTE MAXIMUM RATING
Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85C -55 to 125C Power Dissipation (Tamb=25C) SOT23 330mW E-Line, 3 pin (TO92) 500mW
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C
SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150A 3.27 3.234 3.2 LIMITS TYP MAX 3.3 3.3 3.3 15 3.33 3.366 3.4 20 1 2 3 V TOL.% UNITS
IMIN IR TC
Minimum Operating Current Recommended Operating Current Average Reverse Breakdown Voltage Temp. Co. Slope Resistance Reverse Dynamic Impedance IR = 1mA f = 100Hz IAC= 0.1 IR IR = 150A f = 10Hz to 10kHz
40
A mA
0.02
5
15 IR(min) to IR(max) 0.6 0.5
50
ppm/C
RS ZR
2 1.2

EN
Wideband Noise Voltage
75 V(rms)
TC =
(VR(max)-VR(min)) x 1000000
Reverse Current (A)
VR x (T(max)-T(min))
30
Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range. RS = VR Change (IR (min) to IR (max)) IR (max) - IR (min)
20 TA=85C 10 TA=-40C
TA=25C
0 0 2.0 4.0
Reverse Voltage (V)
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ZRC330
TYPICAL CHARACTERISTICS
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.1 1 10 100 1000 -40 -20 0 20 40 60 80 3.31 IR=150A to 5mA
Reference voltage (V)
Forward Voltage (V)
3.30
3.29
Forward Current (mA)
Temperature (C)
Forward Characteristics
Temperature Drift
3.0
1000
IR=150A
Slope resistance ()
Slope resistance ()
100
IR=1mA
2.0 TA=25C TA=-40C
10
IR=5mA
1.0
1
TA=85C 0 0.1 1 10
0.1 0.01 0.1 1 10 100
Reference Current (mA)
Frequency (KHz)
Slope Resistance v Current
Slope Resistance v Frequency
3.0
3.0
VR - (V)
5 mA
150 A INPUT 1K3 5mA 43K 150A OUTPUT
5 mA
150 A INPUT 43K 150A OUTPUT
VR - (V)
2.0
2.0
1.0
1.0
1K3 5mA
0
0
VIN - (V)
VIN - (V)
0 100 200 300
10
10
0
0 0 1 2 3 4
Time (s)
Time (s)
Transient Response (Single Pulse)
Transient Response (Repetitive Pulse)
4-254
ZRC330
E-Line, 3 pin Package Suffix - A
SOT23 Package Suffix - F
Bottom View - Pin 1 floating or connected to pin 3
Top View - Pin 1 floating or connected to pin 2
4-255
ZRC330
ORDERING INFORMATION
Part No ZRC330A03 ZRC330A02 ZRC330A01 ZRC330F03 ZRC330F02 ZRC330F01 * E-Line 3 pin Tol% Package 3 2 1 3 2 1 E-Line * E-Line * E-Line * SOT23 SOT23 SOT23 Partmark ZRC33003 ZRC33002 ZRC33001 33A 33B 33C
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