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SPX4040
Precision Micropower 2.5V Shunt Voltage Reference
* Low temperature coefficient 100 ppm/C * Operating current range 100A to 15 mA * Low power, 250 mW @ Iin=100 mA * Two terminal "Zener" operation * Small package: SOT - 23, TO-92, and SO-8 * Fixed reverse breakdown voltage 2.5 Volt * No output capacitance required * Similar replacement for LM4040
FEATURES
* Constant Current Source * Digital Voltmeter * Power Supply Monitor * Precision Regulators * Battery-Powered Equipment * Instrumentation * Automotive Electronics * Data Acquisition Systems * Energy Management
APPLICATIONS
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 x 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
8-Pin Surface Mount (S)
N/C N/C N/C 1 2 3 4 8 7 6 5 + N/C N/C N/C 3
SOT-23-3 (M)
2 1
TO-92 (N)
1 2 3
+
Bottom View Top View
Top View
Rev. 10/25/00
SPX4040
ABSOLUTE MAXIMUM RATINGS
Reverse Current................................................................20mA Forward Current ...............................................................10mA Storage Temperature ...................................... -65C to +150C Lead Temperature (Soldering) ........................................ 300C Power Dissipation at 25C M Package ...................................................... 300mW N Package ....................................................... 550mW S Package........................................................ 525mW Temperature Range ................................... -40C TA +85C
ELECTRICAL CHARACTERISTICS (SPX4040-2.5V)
Electrical Characteristics at IIN = 1000A, and TA = +25C unless otherwise noted. . Boldface limits apply over temperature SPX4040A2 SPX4040B2 Units Parameters Conditions Min Typ Max Min Typ Max
Reverse Breakdown Voltage Reverse Breakdown Tolerance Output Impedance Noise Voltage Tempco Turn-on Setting Operating Current Range Temp. Range IR=500 A IR=500 A 0.60 15 30 0.1 15 0.1 2.500 25 49 2 50 30 15 2.500 25 49 2 100 V mV mV V p-p ppm/C Sec mA
0.1KHzf 10Hz Note 1 0.1% of VOUT Note 2
0.60 15
-40 Conditions
IR=500 A IR=500 A 0.60 15 30 0.1
85 SPX4040A3 Typ
2.500 50 74 2 50
-40 Min SPX4040B3 Typ
2.500
85 Max
C Units
V
Parameters
Reverse Breakdown Voltage Reverse Breakdown Tolerance Output Impedance Noise Voltage Tempco Turn-on Setting Operating Current Range Temp. Range
Min
Max
0.1KHzf 10Hz Note 1 0.1% of VOUT Note 2
0.60 15 30
50 74 2 100
15
0.1
15
mV mV V p-p ppm/C Sec mA
-40
85
-40
85
C
Rev. 10/25/00
SPX4040
ELECTRICAL CHARACTERISTICS (SPX4040-5.0V)
Electrical Characteristics at IIN = 1000A, and TA = +25C unless otherwise noted. . Boldface limits apply over temperature SPX4040A2 SPX4040B2 Units Parameters Conditions Min Typ Max Min Typ Max
Reverse Breakdown Voltage Reverse Breakdown Tolerance Output Impedance Noise Voltage Tempco Turn-on Setting Operating Current Range Temp. Range IR=500 A IR=500 A 0.60 15 30 0.175 15 0.175 5.000 50 98 2 50 30 15 5.000 50 98 2 100 V mV mV V p-p ppm/C Sec mA
0.1KHzf 10Hz Note 1 0.1% of VOUT Note 2
0.60 15
-40 Conditions
IR=500 A IR=500 A 0.60 15 30 0.175
85 SPX4040A3 Typ
5.000 100 148 2 50
-40 Min SPX4040B3 Typ
5.000
85 Max
C Units
V
Parameters
Reverse Breakdown Voltage Reverse Breakdown Tolerance Output Impedance Noise Voltage Tempco Turn-on Setting Operating Current Range Temp. Range Note:
Min
Max
0.1KHzf 10Hz Note 1 0.1% of VOUT Note 2
0.60 15 30
100 148 2 100
15
0.175
15
mV mV V p-p ppm/C Sec mA
-40
85
-40
85
C
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 25C. 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 (RS) is connected between the supply voltage and the SPX4040. RS determines the current that flows through the load (IL) and the reference(IQ). Since load current and supply voltage may vary, RS should be small enough to supply at least the minimum acceptable IQ 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 IL is at its minimum, RS should be large enough so that the current flowing through the SPX4040 is less than 15mA RS is determined by the supply voltage (VS), the load and operating current (IL and IQ), reference's reverse breakdown voltage (VR). Figure 1. SPX4040 Fixed Shunt Regulator Application
VS
RS VR SPX4040
I O + IL IL IQ VO
RS = (VS - VR)/(IL+IQ)
Rev. 10/25/00
SPX4040
PACKAGE DRAWING 8-PIN SOIC (S)
4.0 (0.158) 3.8 (0.150)
5.2 (0.205) 4.6 (0.181)
6.2 (0.244) 5.8 (0.228)
Pin 1
1.27 (0.50) BSC
1.75 (0.069) 1.35 (0.053) 0.78 (0.031) 0.61 (0.024) 5.0 (0.197) 4.8 (0.188) 0.37 (0.015) BSC 0.77 (0.030) 0.64 (0.025) 7 (4 PLCS)
45
3-6 0.56 (0.022) 0.49 (0.019) 0.45 (0.018) 0.35 (0.014) 0.20 (0.008) 0.10 (0.004) 0.22 (0.009) 0.19 (0.007) 7 (4 PLCS)
Rev. 10/25/00
SPX4040
DRAWING PACKAGE SOT-23-3L (M)
0.015 - 0.018 (0.381 - 0.457)
0.047 - 0.055 0.083 - 0.098 (1.194 - 1.397) (2.108 - 2.489)
0.035 - 0.040 (0.889 - 1.016) 0.020 - 0.024 (0.508 - 0.610) 0.070 - 0.080 (1.778 - 2.032)
0.110 - 0.120 (2.794 - 3.048)
0.003 - 0.005 (0.076 - 0.127)
0.001 - 0.004 (0.025 - 0.102)
0.030 - 0.041 (0.762 - 1.041)
0.018 - 0.024 (0.457 - 0.610)
Rev. 10/25/00
SPX4040
PACKAGE DRAWING TO-92 (N)
0.090 (2.286) Radius typ. 2 1 3 0.145 (3.683) 0.135 (3.429) 0.055 (1.397) 0.045 (1.143)
10 typ.
BOTTOM VIEW
0.185 (4.699) 0.045 (1.143) 0.085 (2.159) Diameter
5 typ. 0.185 (4.699) 0.175 (4.445) 0.090 (2.286) typ. 5 typ. Seating Plane
0.025 (0.635) Max Uncontrolled Lead Diameter 0.500 (12.70) Min.
0.016 (0.406) 0.014 (0.356) 0.055 (1.397) 0.045 (1.143) 0.105 (2.667) 0.095 (2.413) 0.0155 (0.3937) 0.0145 (0.3683)
Rev. 10/25/00
SPX4040
ORDERING INFORMATION Ordering No.
SPX4040A2N-2.5 SPX4040A2N-5.0 SPX4040B2N-2.5 SPX4040B2N-5.0 SPX4040A3N-2.5 SPX4040A3N-5.0 SPX4040B3N-2.5 SPX4040B3N-5.0 SPX4040A2S-2.5 SPX4040A2S-5.0 SPX4040B2S-2.5 SPX4040B2S-5.0 SPX4040A3S-2.5 SPX4040A3S-5.0 SPX4040B3S-2.5 SPX4040B3S-5.0 SPX4040A2M-2.5 SPX4040A2M-5.0 SPX4040B2M-2.5 SPX4040B2M-5.0 SPX4040A3M-2.5 SPX4040A3M-5.0 SPX4040B3M-2.5 SPX4040B3M-5.0
Temp Coef
100ppm 100ppm 150ppm 150ppm 100ppm 100ppm 150ppm 150ppm 100ppm 100ppm 150ppm 150ppm 100ppm 100ppm 150ppm 150ppm 100ppm 100ppm 150ppm 150ppm 100ppm 100ppm 150ppm 150ppm
Output Accuracy
1% 1% 1% 1% 2% 2% 2% 2% 1% 1% 1% 1% 2% 2% 2% 2% 1% 1% 1% 1% 2% 2% 2% 2%
Reverse Breakdown Voltage
2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V 2.5V 5.0V
Packages
3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23
Corporation
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.
Rev. 10/25/00

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