Rev. 10/25/00
SPX4040
Precision Micropower 2.5V Shunt Voltage Reference
FEATURES
APPLICATIONS
Low temperature coefficient 100 ppm/C
Constant Current Source
Operating current range 100
A to 15 mA
Digital Voltmeter
Low power, 250 mW @ Iin=100 mA
Power Supply Monitor
Two terminal "Zener" operation
Precision Regulators
Small package: SOT - 23, TO-92, and SO-8
Battery-Powered Equipment
Fixed reverse breakdown voltage 2.5 Volt
Instrumentation
No output capacitance required
Automotive Electronics
Similar replacement for LM4040
Data Acquisition Systems
Energy Management
PRODUCT DESCRIPTION
The SPX4040 is a two-terminal, temperature compensated, band-gap voltage reference, which provides a fixed 2.5V output for input
currents between 100
A to 15mA. The bandgap voltage (2.5V) is independently trimmed from the output voltage to achieve a very
low tempco. This trimming technique process gives a very stable device over the full temperature range (A grade 50 ppm/
C). The
SPX4040 is available in the sub-miniature (3mm
1.3mm) SOT-23, SO-8 surface mount package, or TO-92 package. The operating
temperature is -40C to 85C.
The SPX4040 advanced design eliminates the need for an external stabilized capacitor while insuring stability with any capacitive
load, making them easy to use.
PIN CONNECTIONS
Top View
2
1
3
4
8
7
6
5
8-Pin Surface Mount (S)
SOT-23-3 (M)
Top View
2
3
+
-
1
Bottom View
TO-92 (N)
1
3
2
N/C
N/C
N/C
-
N/C
N/C
N/C
+
Rev. 10/25/00
SPX4040
ABSOLUTE MAXIMUM RATINGS
Reverse Current................................................................20mA
Power Dissipation at 25
C
Forward
Current ...............................................................10mA M
Package ...................................................... 300mW
Storage Temperature ...................................... -65
C to +150C N
Package ....................................................... 550mW
Lead Temperature (Soldering) ........................................ 300
C S
Package........................................................ 525mW
Temperature
Range ................................... -40
C T
A
+85C
ELECTRICAL CHARACTERISTICS (SPX4040-2.5V)
Electrical Characteristics at I
IN
= 1000
A, and T
A
= +25C unless otherwise noted. . Boldface limits apply over temperature
Parameters
Conditions
SPX4040A2
Min Typ Max
SPX4040B2
Min Typ Max
Units
Reverse Breakdown
Voltage
I
R
=500
A
2.500
2.500 V
Reverse Breakdown
Tolerance
I
R
=500
A
25
49
25
49
mV
mV
Output
Impedance
0.60 2 0.60 2
Noise Voltage
0.1KHz
f 10Hz
15 15
V p-p
Tempco Note
1
50
100
ppm/
C
Turn-on Setting
0.1% of V
OUT
30 30 Sec
Operating Current Range
Note 2
0.1
15
0.1
15
mA
Temp
. Range
-40
85
-40
85
C
Parameters
Conditions
SPX4040A3
Min Typ Max
SPX4040B3
Min Typ Max
Units
Reverse Breakdown
Voltage
I
R
=500
A
2.500
2.500 V
Reverse Breakdown
Tolerance
I
R
=500
A
50
74
50
74
mV
mV
Output Impedance
0.60
2
0.60
2
Noise Voltage
0.1KHz
f 10Hz
15 15
V p-p
Tempco Note
1
50
100
ppm/
C
Turn-on Setting
0.1% of V
OUT
30 30
Sec
Operating Current Range
Note 2
0.1
15
0.1
15
mA
Temp. Range
-40
85
-40
85
C
Rev. 10/25/00
SPX4040
ELECTRICAL CHARACTERISTICS (SPX4040-5.0V)
Electrical Characteristics at I
IN
= 1000
A, and T
A
= +25C unless otherwise noted. . Boldface limits apply over temperature
Parameters
Conditions
SPX4040A2
Min Typ Max
SPX4040B2
Min Typ Max
Units
Reverse Breakdown
Voltage
I
R
=500
A
5.000
5.000 V
Reverse Breakdown
Tolerance
I
R
=500
A
50
98
50
98
mV
mV
Output
Impedance
0.60 2 0.60 2
Noise Voltage
0.1KHz
f 10Hz
15 15
V p-p
Tempco Note
1
50
100
ppm/
C
Turn-on Setting
0.1% of V
OUT
30 30
Sec
Operating Current Range
Note 2
0.175
15
0.175
15
mA
Temp
. Range
-40
85
-40
85
C
Parameters
Conditions
SPX4040A3
Min Typ Max
SPX4040B3
Min Typ Max
Units
Reverse Breakdown
Voltage
I
R
=500
A
5.000
5.000 V
Reverse Breakdown
Tolerance
I
R
=500
A
100
148
100
148
mV
mV
Output
Impedance
0.60 2 0.60 2
Noise Voltage
0.1KHz
f 10Hz
15 15
V p-p
Tempco Note
1
50
100
ppm/
C
Turn-on Setting
0.1% of V
OUT
30 30
Sec
Operating Current Range
Note 2
0.175
15
0.175
15
mA
Temp. Range
-40
85
-40
85
C
Note:
1) Three-point measurement guarantees the error band over the specified temperature range.
2) Optimum performance is obtained at currents below 1000
A.
3) Limits are 100% production tested at 25
C. Limits over temperature are guaranteed through correlation using statistical quality control.
Rev. 10/25/00
SPX4040
SPX4040 Applications Hints
This device is designed for stable operation and has no need
of an external capacitor between pin 4 and 8. The reference
remains stable if a bypass capacitor is used.
SOT-23
The SPX4040 in the SOT-23 package has a parasitic
Schottky diode between pin 3 and pin 1. Pin 1 of SOT-23
must float or be connected to pin 3.
Conventional Shunt Regulator
In a conventional shunt regulator application (see Figure 1),
an external series resister (R
S
) is connected between the
supply voltage and the SPX4040. R
S
determines the current
that flows through the load (I
L
) and the reference(I
Q
). Since
load current and supply voltage may vary, R
S
should be small
enough to supply at least the minimum acceptable I
Q
to the
reference even when the supply voltage is at its minimum and
the load current is at its maximum value. When the supply
voltage is at its maximum and I
L
is at its minimum, R
S
should
be large enough so that the current flowing through the
SPX4040 is less than 15mA
R
S
is determined by the supply voltage (V
S
), the load and
operating current (I
L
and I
Q
), reference's reverse breakdown
voltage (V
R
).
R
S
= (V
S
- V
R
)/(I
L
+I
Q
)
Figure 1. SPX4040 Fixed
Shunt Regulator Application
V
S
R
S
V
R
I
L
I
Q
I
O
+ I
L
V
O
SPX4040
Rev. 10/25/00
SPX4040
PACKAGE DRAWING
8-PIN SOIC (S)
Pin 1
1.27 (0.50)
BSC
3.8 (0.150)
4.0 (0.158)
4.6 (0.181)
5.2 (0.205)
5.8 (0.228)
6.2 (0.244)
4.8 (0.188)
5.0 (0.197)
0.49 (0.019)
0.56 (0.022)
0.35 (0.014)
0.45 (0.018)
0.10 (0.004)
0.20 (0.008)
0.19 (0.007)
0.22 (0.009)
1.35 (0.053)
1.75 (0.069)
0.61 (0.024)
0.78 (0.031)
3
-6
0.64 (0.025)
0.77 (0.030)
45
7
(4 PLCS)
7
(4 PLCS)
0.37 (0.015)
BSC
Rev. 10/25/00
SPX4040
DRAWING PACKAGE
SOT-23-3L (M)
0.015 - 0.018
(0.381 - 0.457)
0.020 - 0.024
(0.508 - 0.610)
0.110 - 0.120
(2.794 - 3.048)
0.001 - 0.004
(0.025 - 0.102)
0.030 - 0.041
(0.762 - 1.041)
0.018 - 0.024
(0.457 - 0.610)
0.070 - 0.080
(1.778 - 2.032)
0.035 - 0.040
(0.889 - 1.016)
0.047 - 0.055
(1.194 - 1.397)
0.083 - 0.098
(2.108 - 2.489)
0.003 - 0.005
(0.076 - 0.127)
Rev. 10/25/00
SPX4040
PACKAGE DRAWING
TO-92 (N)
1
2
3
0.055 (1.397)
0.045 (1.143)
0.145 (3.683)
0.135 (3.429)
10 typ.
BOTTOM VIEW
0.185 (4.699)
0.045 (1.143)
0.185 (4.699)
0.175 (4.445)
0.085 (2.159) Diameter
0.090 (2.286) typ.
Seating Plane
0.016 (0.406)
0.014 (0.356)
0.055 (1.397)
0.045 (1.143)
0.105 (2.667)
0.095 (2.413)
0.500 (12.70) Min.
0.025 (0.635) Max
Uncontrolled
Lead Diameter
5 typ.
5 typ.
0.090 (2.286) Radius typ.
0.0155 (0.3937)
0.0145 (0.3683)
Rev. 10/25/00
SPX4040
ORDERING INFORMATION
Ordering No.
Temp Coef Output Accuracy Reverse Breakdown Voltage Packages
SPX4040A2N-2.5
100ppm
1%
2.5V
3 Lead TO-92
SPX4040A2N-5.0
100ppm
1%
5.0V
3 Lead TO-92
SPX4040B2N-2.5
150ppm
1%
2.5V
3 Lead TO-92
SPX4040B2N-5.0
150ppm
1%
5.0V
3 Lead TO-92
SPX4040A3N-2.5
100ppm
2%
2.5V
3 Lead TO-92
SPX4040A3N-5.0
100ppm
2%
5.0V
3 Lead TO-92
SPX4040B3N-2.5
150ppm
2%
2.5V
3 Lead TO-92
SPX4040B3N-5.0
150ppm
2%
5.0V
3 Lead TO-92
SPX4040A2S-2.5
100ppm
1%
2.5V
8 Lead SOIC
SPX4040A2S-5.0
100ppm
1%
5.0V
8 Lead SOIC
SPX4040B2S-2.5
150ppm
1%
2.5V
8 Lead SOIC
SPX4040B2S-5.0
150ppm
1%
5.0V
8 Lead SOIC
SPX4040A3S-2.5
100ppm
2%
2.5V
8 Lead SOIC
SPX4040A3S-5.0
100ppm
2%
5.0V
8 Lead SOIC
SPX4040B3S-2.5
150ppm
2%
2.5V
8 Lead SOIC
SPX4040B3S-5.0
150ppm
2%
5.0V
8 Lead SOIC
SPX4040A2M-2.5
100ppm
1%
2.5V
3 Lead SOT-23
SPX4040A2M-5.0
100ppm
1%
5.0V
3 Lead SOT-23
SPX4040B2M-2.5
150ppm
1%
2.5V
3 Lead SOT-23
SPX4040B2M-5.0
150ppm
1%
5.0V
3 Lead SOT-23
SPX4040A3M-2.5
100ppm
2%
2.5V
3 Lead SOT-23
SPX4040A3M-5.0
100ppm
2%
5.0V
3 Lead SOT-23
SPX4040B3M-2.5
150ppm
2%
2.5V
3 Lead SOT-23
SPX4040B3M-5.0
150ppm
2%
5.0V
3 Lead SOT-23
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and Main Offices:
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 935-7600
FAX: (408) 934-7500
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described
hereing; neither does it convey any license under its patent rights nor the rights of others.
Corporation
PDF 
ZIP