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ETC |
PRECISION 4.0 VOLT MICROPOWER
VOLTAGE REFERENCE
ISSUE 1 - JANUARY 1996
ZRA400
DEVICE DESCRIPTION
The ZRA400 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 4.096 volts. The device is available
in small outline surface mount packages, ideal
for applications where space saving is
important.
The ZRA400 design provides a stable voltage
without an external capacitor and is stable with
capacitive loads. The ZRA400 is
recommended for operation between 50µA
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.
• No stabilising capacitor required
• Typical TC 15ppm/°C
• Typical slope resistance 0.55Ω
• ± 3%, 2% and 1% tolerance
• Industrial temperature range
• Operating current 50µA to 5mA
APPLICATIONS
• Battery powered and portable equipment.
• Metering and measurement systems.
• Instrumentation.
• Test equipment.
• Data acquisition systems.
• Precision power supplies.
• Crystal oscillators
FEATURES
• Small outline SO8, SOT23 and TO92 style
packages.
SCHEMATIC DIAGRAM
V
R
Gnd
1 - 33
ZRA400
ABSOLUTE MAXIMUM RATING
Reverse Current
25mA
Forward Current
25mA
Operating Temperature -40 to 85°C
Storage Temperature
-55 to 125°C
Power Dissipation (Tamb=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) Tamb=25°C
SYMBOL PARAMETER
CONDITIONS
LIMITS
VR
IMIN
IR
TC
RS §
ZR
Reverse Breakdown Voltage IR=150µA
Minimum Operating Current
Recommended Operating
Current
Average Reverse
Breakdown Voltage Temp.
Co.
IR(min) to
IR(max)
Slope Resistance
Reverse Dynamic Impedance IR = 1mA
f = 100Hz
IAC= 0.1 IR
MIN TYP MAX
4.05 4.096 4.14
4.01 4.096 4.18
3.97 4.096 4.22
25 50
0.05 5
15 50
0.55 2
0.5 1.2
TOL. UNITS
%
1V
2
3
µA
mA
ppm/°C
Ω
Ω
TC
=
VR Changex 1000000
VR x Temperature Change
§
RS
=
VR
Change(IR (min) to IR
IR (max) − IR (min)
(max))
50
40
30
T)=85°C
20 T)=25°C
T)=-40°C
10
0
0 2.0 4.0
Reverse Voltage (V)
Reverse Characteristics
1 - 34
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