Not Recommended for New Design
Please Use ZRC400F01TA /02TA
PRECISION 4.0 VOLT MICROPOWER
VOLTAGE REFERENCE
ISSUE 1 - JANUARY 1996
ZRA400
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No stabilising capacitor required
Typical T
C
15ppm/°C
Typical slope resistance 0.55Ω
±
3%, 2% and 1% tolerance
Industrial temperature range
Operating current 50µA to 5mA
Battery powered and portable equipment.
Metering and measurement systems.
Instrumentation.
Test equipment.
Data acquisition systems.
Precision power supplies.
Crystal oscillators
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.
APPLICATIONS
FEATURES
•
Small outline SO8, SOT23 and TO92 style
packages.
SCHEMATIC DIAGRAM
V
R
G
nd
1 - 33
Not Recommended for New Design
Please Use ZRC400F01TA /02TA
ZRA400
ABSOLUTE MAXIMUM RATING
Reverse Current
Forward Current
Operating Temperature
Storage Temperature
25mA
25mA
-40 to 85°C
-55 to 125°C
Power Dissipation (T
amb
=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) T
amb
=25°C
SYMBOL PARAMETER
CONDITIONS
MIN
V
R
Reverse Breakdown Voltage I
R
=150µA
4.05
4.01
3.97
0.05
15
LIMITS
TYP
MAX
1
2
3
V
TOL.
%
UNITS
4.096 4.14
4.096 4.18
4.096 4.22
25
50
5
50
I
MIN
I
R
T
C
Minimum Operating Current
Recommended Operating
Current
Average Reverse
Breakdown Voltage Temp.
Co.
Slope Resistance
Reverse Dynamic Impedance I
R
= 1mA
f = 100Hz
I
AC
= 0.1 I
R
I
R(min)
to
I
R(max)
µA
mA
ppm/°C
R
S
§
Z
R
0.55
0.5
2
1.2
Ω
Ω
Reverse Current (µA)
T
C
=
V
R
Change
x
1000000
V
R
x Temperature Change
50
40
30
20
10
0
T
)
=85°C
T
)
=25°C
T
)
=-40°C
V
R
Change
(I
R
(min)
to I
R
(
max))
§
R
S
=
I
R
(
max
)
−
I
R
(
min)
0
2.0
4.0
Reverse Voltage (V)
Reverse Characteristics
1 - 34
Not Recommended for New Design
Please Use ZRC400F01TA /02TA
ZRA400
CONNECTION DIAGRAMS
E-Line, 2 pin Package Suffix Y
E-Line, 3 pin,Rev Package Suffix R
Bottom View
Bottom View
Pin 3 floating or connected to pin 1
E-Line, 3 pin Package Suffix A
SO8 Package Suffix N8
Bottom View
Pin 1 floating or connected to pin 3
Top View
SOT23 Package Suffix F
Top View
Pin 1 floating or connected to pin 2
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