Zetex ZXRE125DN8, ZXRE125DR, ZXRE125EF, ZXRE125EN8, ZXRE125ER Datasheet
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ZXRE125
SOT23 MICROPOWER 1.22V VOLTAGE REFERENCE
DESCRIPTION
The ZXRE125 is a bandgap circuit designed to achieve a precision micropower voltage reference of 1.22 volts. The device is available in the small outline SOT23 surface mount package which is ideal for applications where space saving is important.
SOT23 tolerance is available to 0.5% for precision applications. Excellent performance is maintained over the 30 A to 5mA operating current range with a
FEATURES
•High performance replacement for ZRA124 and ZRA125 references
•Small outline SOT23
•SO8 and E-Line alternatives available
•30 A knee current
•20ppm/°C typical temperature coefficient
•Unconditionally stable
•0.5%, 1%, 2% and 3% tolerance
•Contact Zetex marketing for availability of tighter tolerance devices
typical temperature coefficient of only 20ppm/°C. The device has been designed to be highly tolerant of capacitive loads so maintaining excellent stability.
This device offers a SOT23 pin for pin compatible replacement of the ZRA124 and ZRA125 series of voltage references. SO8 and E-Line (TO92 style) packages can also be made available.
•Battery powered equipment
•Precision power supplies
•Portable instrumentation
•Portable communications devices
•Notebook and palmtop computers
•Data acquisition systems
•A/D and D/A converters
•Test equipment
SCHEMATIC DIAGRAM |
APPLICATIONS CIRCUIT |
VR
1.5V
4k7
1.22V
Gnd |
Low quiescent reference from a 1.5V battery source. |
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APPLICATIONS
ISSUE 4 - JANUARY 2002
1
ZXRE125
ABSOLUTE MAXIMUM RATINGS
Reverse Current |
30mA |
Power Dissipation (Tamb=25°C) |
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Forward Current |
10mA |
SOT23 |
330mW |
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SO8 |
625mW |
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Operating temperature. |
-40 to 85°C |
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E-Line |
500mW |
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Storage temperature. |
-55 to 125°C |
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ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
SYMBOL |
PARAMETER |
CONDITIONS |
LIMITS |
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TOL. % |
UNITS |
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MIN |
TYP |
MAX |
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VR |
Reverse Breakdown Voltage |
IR=100µA |
1.214 |
1.22 |
1.226 |
0.5 ‡ |
V |
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1.208 |
1.22 |
1.232 |
1 |
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1.196 |
1.22 |
1.244 |
2 |
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1.183 |
1.22 |
1.257 |
3 |
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IMIN |
Minimum Knee Current |
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30 |
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µA |
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IR |
Recommended Operating |
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0.03 |
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5 |
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mA |
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Current Range |
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TC † |
Average Reverse Breakdown |
IR(min) to |
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20 |
90 |
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ppm/°C |
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Voltage Temperature |
IR(max) |
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Coefficient |
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∆VR |
Reverse Breakdown Voltage |
IR=30µA to 1mA |
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1 |
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mV |
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change with Current |
IR=1mA to 5mA |
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10 |
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mV |
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∆IR |
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ZR |
Reverse Dynamic Impedance |
IR =1mA |
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0.2 |
0.6 |
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Ω |
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f =100Hz |
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IAC=0.1 IR |
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EN |
Wideband Noise Voltage |
IR=8µA to |
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60 |
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µV(rms) |
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100µA |
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f=10Hz to 10kHz |
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† TC = |
(VR (max )−VR ( min )) x 1000000 |
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VR x (T(max )−T(min )) |
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Note: VR(max) - VR(min) is the maximum deviation in reference
voltage measured over the full operating temperature range.
‡ Note: 0.5% SOT23 only.
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5 |
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(mA) |
4 |
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3 |
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Current |
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TA=-40c TO +85C |
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2 |
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Reverse |
1 |
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0 |
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0 |
0.2 |
0.4 |
0.6 |
0.8 |
1.0 |
1.2 |
1.4 |
Reverse Voltage (V)
Reverse Characteristics
ISSUE 4 - JANUARY 2002
2
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