PRECISION 2.5 VOLT MICROPOWER
VOLTAGE REFERENCE
ZR4040-2.5
ISSUE 4 - JANUARY 2003
DEVICE DESCRIPTION
FEATURES
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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 a small outline surface mount
package, 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
60µA and 15mA and so is ideally suited to
low power and battery powered
applications.
Small outline SOT23 package
TO92 style package
No stabilising capacitor required
Typical TC 30ppm/°C
Typical slope resistance 0.4Ω
2% 1% and 0.5 % tolerance
Industrial temperature range
Operating current 60µA to 15mA
Transient response, stable in less than
10µs
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
an d cu rrents up to 200mA. Superior
switching capability allows the device to
reach stable operating conditions in only a
few microseconds.
SCHEMETIC DIAGRAM
V
R
G nd
4-173
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Battery powered and portable
equipment.
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Metering and measurement systems.
Instrumentation.
Test equipment.
Data acquisition systems.
Precision power supplies.
ZR4040-2.5
ABSOLUTE MAXIMUM RATING
Reverse Current
Forward Current
Operating Temperature
Storage Temperature
Power Dissipation (Tamb=25°C)
SOT23
330mW
E-Line, 3 pin (TO92)
500mW
25mA
25mA
-40 to 85°C
-55 to 125°C
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
CONDITIONS
SYMBOL PARAMETER
LIMITS
MIN
VR
Reverse Breakdown Voltage
IMIN
Minimum Operating Current
IR
Recommended Operating
Current
TC †
Average Reverse
Breakdown Voltage Temp.
Co.
IR=150µA
TYP
TOL.
%
UNITS
MAX
2.4875 2.5
2.475
2.5
2.45
2.5
2.5125 0.5
2.525 1
2.55
2
V
60
µA
15
mA
30
100
ppm/°C
25
0.06
IR(min) to
IR(max)
RS §
Slope Resistance
0.4
2
Ω
ZR
Reverse Dynamic Impedance IR = 1mA
f = 100Hz
IAC= 0.1 IR
0.3
0.8
Ω
EN
Wideband Noise Voltage
45
TC =
(VR(max)−VR(min)) x 1000000
VR x (T(max)−T(min))
Note: VR(max) - VR(min) is the maximum
deviation in reference voltage measured
over the full operating temperature
range.
§
RS =
VR Change (IR (min) to IR (max))
IR (max) − IR (min)
µV
(rms)
60
Reverse Current (µA)
†
IR = 1mA
f = 10Hz to
10kHz
50
40
30
20
TA
10
5°C
=8
5°C C
=2
°
TA -40
=
TA
0
0.2
0.6
1.0
1.4
1.8
2.2
Reverse Voltage (V)
Reverse Characteristics
4-174
2.6
ZR4040-2.5
1.4
2.53
1.2
2.52
IR =150µA to 5mA
Reference voltage (V)
Forward Voltage (V)
TYPICAL CHARACTERISTICS
1.0
0.8
0.6
0.4
0.2
2.51
2.50
2.49
2.48
2.47
0.1
1
10
100
1000
-40
-20
Forward Current (mA)
0
20
40
60
80
Temperature (°C)
Forward Characteristics
Temperature Drift
1000
0.5
TA=-40°C
TA=25°C
Slope resistance (Ω)
Slope resistance (Ω)
IR=150µA
1.0
100
IR=1mA
10
IR=5mA
1
TA=85°C
0.1
0
0.1
1
0.01
10
0.1
Slope Resistance v Current
100
3.0
VR - (V)
2.0
INPUT
50K
1.0
OUTPUT
2.0
INPUT
OUTPUT
0
10
10
0
0
1
2
3
1K5
1.0
0
VIN - (V)
VR - (V)
10
Slope Resistance v Frequency
3.0
VIN - (V)
1
Frequency (kHz)
Reference Current (mA)
0
0
4
Time (µs)
0.1
0.2
0.3
Time (µs)
µA)
Transient Response (IR=150µ
Transient Response (IR=5mA)
4-175
0.4
ZR4040-2.5
CONNECTION DIAGRAMS
E-Line, 3 pin, Rev Package Suffix – R
SOT23 Package Suffix – F
Bottom View –
Pin 3 floating or connected to pin 1
Top View –
Pin 1 floating or connected to pin 2
ORDERING INFORMATION
Part Number
Tol%
Package
Partmark
ZR40402F25
2
SOT23
25L
ZR40401F25
1
SOT23
25M
25V
ZR404005F25
0.5
SOT23
ZR40402R25
2
E-Line * ZR4040225
ZR40401R25
1
E-Line * ZR4040125
ZR404005R25
0.5
E-Line *
ZR4040525
* E-Line, 3 pin Reversed
4-176
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