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SPX4041
Precision Micropower 1.24V Shunt Voltage Reference
FEATURES APPLICATIONS
* Low temperature coefficient 50 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 * Output voltage tolerance 0.5%
* Constant Current Source * Digital Voltmeter * Power Supply Monitor * Precision Regulators * Battery-Powered Equipment * Instrumentation * Automotive Electronics * Data Acquisition Systems * Energy Management
PRODUCT DESCRIPTION
The SPX4041 is a two-terminal, temperature compensated, band-gap voltage reference, which provides a fixed 1.24V output for input currents between 500 A to 5mA. The bandgap voltage (1.24V) is independently laser trimmed from the output voltage to achieve a very low tempco, then the output voltage is laser trimmed to 1.24 volts. This trimming technique and the low tempco (A grade 50 ppm/ C) thin film resistor process gives a very stable device over the full temperature range. The SPX4041 is available in the subminiature (3mm x 1.3mm) SOT-23, SO-8 surface mount package, or TO-92 package. The operating temperature is -40C to 85C. The SPX4041 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
SPX4041
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
Electrical Characteristics at IIN = 1000A, and TA = +25C unless otherwise noted. . Boldface limits apply over temperature. SPX4041A2 SPX4041B2 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 0.5 -40 5 15 85 0.5 -40 1.24 25 49 2 50 30 5 15 85 1.24 25 49 2 100 V mV mV V p-p ppm/C Sec mA C
0.1kHzf 10Hz Note 1 0.1% of VOUT Note 2
0.60 15
Parameters
Reverse Breakdown Voltage Reverse Breakdown Tolerance Output Impedance Noise Voltage Tempco Turn-on Setting Operating Current Range Temp. Range
Conditions
IR=500 A IR=500 A
Min
SPX4041A3 Typ
1.24
Max
50 74 2 50
Min
SPX4041B3 Typ
1.24
Units Max
V 50 74 2 100 mV mV V p-p ppm/C Sec mA C
0.1kHzf 10Hz Note 1 0.1% of VOUT Note 2
0.60 15 30 0.1 -40
0.60 15 30
5 15 85
0.1 -40
5 15 85
Rev. 10/25/00
SPX4041
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 25C. Limits over temperature are guaranteed through correlation using statistical quality control.
SPX4041 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 SPX4041 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 SPX4041. 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 SPX4041-x.x 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. SPX4041 Fixed Shunt Regulator Application
VS
RS VR
I O + IL IL IQ VO
SPX4041
RS = (VS - VR)/(IL+IQ)
Rev. 10/25/00
SPX4041
DRAWING PACKAGE 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
SPX4041
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
SPX4041
DRAWING PACKAGE 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
SPX4041
ORDERING INFORMATION Ordering No. Temp Coef.
SPX4041AN-2 SPX4041AN-3 SPX4041BN-2 SPX4041BN-3 SPX4041AM-2 SPX4041AM-3 SPX4041BM-2 SPX4041BM-3 SPX4041AS-2 SPX4041AS-3 SPX4041BS-2 SPX4041BS-3 100ppm 100ppm 150ppm 150ppm 100ppm 100ppm 150ppm 150ppm 100ppm 100ppm 150ppm 150ppm
Output Accuracy
1% 2% 1% 2% 1% 2% 1% 2% 1% 2% 1% 2%
Packages
3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23 3 Lead SOT-23 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC
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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