Zetex ZR285F01, ZR285F02, ZR285F03, ZR285N801, ZR285N802 Datasheet
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PRECISION 2.5 VOLT MICROPOWER |
ZR285-2.5 |
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VOLTAGE REFERENCE |
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ISSUE 5 – FEBRUARY 1998 |
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DEVICE DESCRIPTION |
FEATURES |
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The ZR285 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 ZR285 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZR285 is recommended for operation between 20μA and 20mA and so is ideally suited to low power and battery powered applications.
Excellent performance is maintained to an absolute maximum of 30mA, 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.
∙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 20mA
APPLICATIONS
∙Battery powered and portable equipment.
∙Metering and measurement systems.
∙Instrumentation.
∙Test equipment.
∙Data acquisition systems.
∙Precision power supplies.
SCHEMATIC DIAGRAM
V
R
Gnd
4-165
ZR285-2.5
ABSOLUTE MAXIMUM RATING |
Power Dissipation (Tamb=25°C) |
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Reverse Current |
30mA |
SO8 |
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625mW |
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Forward Current |
25mA |
SOT23 |
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330mW |
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Operating Temperature |
-40 to 85°C |
E-Line,2 Pin(TO92) |
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500mW |
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Storage Temperature |
-55 to 125°C |
E-Line,3 Pin(TO92) |
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500mW |
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ELECTRICAL CHARACTERISTICS |
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TEST CONDITIONS (Unless otherwise stated) Tamb=25°C |
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SYMBOL |
PARAMETER |
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CONDITIONS |
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LIMITS |
TOL. |
UNITS |
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% |
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MIN |
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TYP |
MAX |
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VR |
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Reverse Breakdown Voltage |
IR=150μA |
2.475 |
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2.5 |
2.525 |
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V |
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2.45 |
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2.5 |
2.55 |
2 |
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2.425 |
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2.5 |
2.575 |
3 |
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IMIN |
Minimum Operating Current |
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13 |
20 |
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μA |
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IR |
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Recommended Operating |
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0.02 |
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20 |
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mA |
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Current |
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TC |
† |
Average Reverse Breakdown |
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30 |
90 |
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ppm/°C |
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Voltage Temp. Co. |
IR = 1mA to |
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20mA |
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RS |
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Slope Resistance |
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0.4 |
1 |
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Ω |
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ZR |
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Reverse Dynamic Impedance |
IR = 1mA |
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0.3 |
0.8 |
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Ω |
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f = 100Hz |
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IAC=0.1 IR |
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EN |
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Wideband Noise Voltage |
IR = 150μA |
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60 |
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μV (rms) |
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f = 10Hz to |
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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. |
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§ RS = |
VR Change(IR (min) to IR (max)) |
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IR (max) − IR (min) |
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) A μ (
nt e r ur C
e ers ev R
40
30
20
10 |
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TA=25°C |
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0 |
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0 |
1.0 |
2.0 |
3.0 |
Reverse Voltage (V)
Reverse Characteristics
4-166
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