DEVICE DESCRIPTION
The ZR4040-2.5 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 ZR4040-2.5 design provides a stable
voltage without an external capacitor and is
stable with capacitive loads. The ZR4040-2.5
is recommended for operation between
60
A and 15mA and so is ideally suited to
l o w p o w e r a n d b a t t e ry p o w e r e d
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
and currents up to 200mA. Superior
switching capability allows the device to
reach stable operating conditions in only a
few microseconds.
FEATURES
Small outline SO8 and SOT23 packages
TO92 style package
No stabilising capacitor required
Typical T
C
30ppm/C
Typical slope resistance 0.4
2% 1% and 0.5 % tolerance
Industrial temperature range
Operating current 60
A to 15mA
Transient response, stable in less than
10
s
APPLICATIONS
Battery powered and portable
equipment.
Metering and measurement systems.
Instrumentation.
Test equipment.
Data acquisition systems.
Precision power supplies.
V
R
G
nd
PRECISION 2.5 VOLT MICROPOWER
VOLTAGE REFERENCE
ISSUE 3 - MARCH 1998
SCHEMETIC DIAGRAM
ZR4040-2.5
4-173
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) T
amb
=25C
SYMBOL PARAMETER
CONDITIONS
LIMITS
TOL.
%
UNITS
MIN
TYP
MAX
V
R
Reverse Breakdown Voltage
I
R
=150
A
2.4875
2.475
2.45
2.5
2.5
2.5
2.5125
2.525
2.55
0.5
1
2
V
I
MIN
Minimum Operating Current
25
60
A
I
R
Recommended Operating
Current
0.06
15
mA
T
C
Average Reverse
Breakdown Voltage Temp.
Co.
I
R(min)
to
I
R(max)
30
100
ppm/C
R
S
Slope Resistance
0.4
2
Z
R
Reverse Dynamic Impedance I
R
= 1mA
f = 100Hz
I
AC
= 0.1 I
R
0.3
0.8
E
N
Wideband Noise Voltage
I
R
= 1mA
f = 10Hz to
10kHz
45
V
(rms)
ABSOLUTE MAXIMUM RATING
Reverse Current
25mA
Forward Current
25mA
Operating Temperature
-40 to 85C
Storage Temperature
-55 to 125C
Power Dissipation (T
amb
=25C)
SOT23
330mW
SO8
625mW
E-Line, 3 pin (TO92)
500mW
ZR4040-2.5
0
Reverse Characteristics
Reverse Voltage (V)
R
evers
e C
ur
ren
t
(
A
)
0.2
0.6
10
20
30
40
50
60
1.0
1.8
2.6
1.4
2.2
T
A
=25
C
T
A
=85
C
T
A
=-
40C
T
C
=
(
V
R
(
max
)
-
V
R
(
min
)
)
x 1000000
V
R
x
(
T
(
max
)
-
T
(
min
)
)
Note: V
R(max)
- V
R(min)
is the maximum
deviation in reference voltage measured
over the full operating temperature
range.
R
S
=
V
R
Change
(
I
R
(
min
)
to I
R
(
max
))
I
R
(
max
)
-
I
R
(
min
)
4-174
SO8 Package Suffix N8
Top
View
SOT23 Package
Suffix F
Top
View
Pin 1 floating or connected to pin 2
E-Line, 3 pin, Rev Package Suffix R
Bottom
View
Pin 3 floating or connected to pin 1
Part Number
Tol%
Package
Partmark
ZR40402F25
2
SOT23
25L
ZR40401F25
1
SOT23
25M
ZR404005F25
0.5
SOT23
25V
ZR40402N825
2
SO8
ZR4040225
ZR40401N825
1
SO8
ZR4040125
ZR404005N825 0.5
SO8
ZR4040525
ZR40402R25
2
E-Line * ZR4040225
ZR40401R25
1
E-Line * ZR4040125
ZR404005R25
0.5
E-Line *
ZR4040525
* E-Line, 3 pin Reversed
ZR4040-2.5
CONNECTION DIAGRAMS
ORDERING INFORMATION
4-176
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