LM2903 Low-power dual voltage comparator Features Wide single supply voltage range or dual supplies +2 V to +36 V or 1 V to 18 V Very low supply current (0.4 mA) independent of supply voltage (1 mW/comparator at +5 V) Low input bias current: 25 nA typ. Low input offset current: 5 nA typ. Input common-mode voltage range includes negative rail Low output saturation voltage: 250 mV typ. (IO = 4 mA) Differential input voltage range equal to the supply voltage TTL, DTL, ECL, MOS, CMOS compatible outputs N DIP8 (Plastic package) D SO-8 (Plastic micropackage) P TSSOP8 (Thin shrink small outline package) Description This device consists of two independent lowpower voltage comparators designed specifically to operate from a single supply over a wide range of voltages. Operation from split power supplies is also possible. Pin connections (top view) The device also has a unique characteristic in that the input common-mode voltage range includes the negative rail even though operated from a single power supply voltage. 1 - Output 1 2 - Inverting input 1 3 - Non-inverting input 1 4 - VCC5 - Non-inverting input 2 6 - Inverting input 2 7 - Output 2 8 - VCC+ February 2012 Doc ID 2470 Rev 9 1/15 www.st.com 15 Schematic diagram 1 LM2903 Schematic diagram Figure 1. Schematic diagram (1/2 LM2903) 3.5 A 100 A Non-inverting input Inverting input 2/15 Doc ID 2470 Rev 9 3.5 A 100 A LM2903 2 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol Parameter VCC Supply voltage Vid Differential input voltage Vin Input voltage Output short-circuit to ground (1) Value Unit 18 to 36 V 36 V -0.3 to +36 V Infinite (2) Rthja Thermal resistance junction to ambient DIP8 SO-8 TSSOP8 85 125 120 C/W Rthjc Thermal resistance junction to case(2) DIP8 SO-8 TSSOP8 41 40 37 C/W +150 C -65 to +150 C 800 V 200 V 1.5 kV Tj Tstg Maximum junction temperature Storage temperature range Human body model ESD (HBM)(3) Machine model (MM)(4) CDM: charged device model(5) + can 1. Short-circuits from the output to VCC cause excessive heating and possible destruction. The maximum output current is approximately 20 mA, independent of the magnitude of VCC+. 2. Short-circuits can cause excessive heating and destructive dissipation. Values are typical. 3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 k resistor between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating. 4. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 ). This is done for all couples of connected pin combinations while the other pins are floating. 5. Charged device model: all pins and the package are charged together to the specified voltage and then discharged directly to the ground through only one pin. This is done for all pins. Table 2. Symbol Operating conditions Parameter Vicm Common mode input voltage range Tmin Tamb Tmax Toper Operating free-air temperature range Doc ID 2470 Rev 9 Value Unit 0 to VCC+ -1.5 0 to VCC+ -2 V -40 to +125 C 3/15 Electrical characteristics LM2903 3 Electrical characteristics Table 3. VCC+ = 5 V, VCC- = GND, Tamb = 25C (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit Vio Input offset voltage (1) Tmin Tamb Tmax 1 7 15 mV Iio Input offset current Tmin Tamb Tmax 5 50 150 nA Iib Input bias current (2) Tmin Tamb Tmax 25 250 400 nA Avd Large signal voltage gain VCC = 15V, RL=15k, Vo=1 to 11V ICC Supply current (all comparators) VCC = 5V, no load VCC = 30V, no load Vid Differential input voltage (3) VOL Low level output voltage (Vid = -1V, Isink = 4mA) Tmin Tamb Tmax 250 IOH High level output current (VCC =Vo =30V, Vid = 1V) Tmin Tamb Tmax 0.1 Isink Output sink current (Vid = -1V, Vo = 1.5V) tres Small signal response time (4) (RL = 5.1k to VCC+) 25 200 0.4 1 V/mV 1 2.5 mA VCC+ V 400 700 mV 1 6 nA A 16 mA 1.3 s (5) trel 1. Large signal response time TTL input (Vref = +1.4 V, RL=5.1k to VCC+) Output signal at 50% of final value Output signal at 95% of final value 500 1 ns s At output switch point, VO 1.4 V, RS = 0 with VCC+ from 5 V to 30 V, and over the full input common-mode range (0 V to VCC+ -1.5 V). 2. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output, so no loading charge exists on the reference of input lines. 3. Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the common-mode range, the comparator will provide a proper output state. The low input voltage state must not be less than -0.3 V (or 0.3 V below the negative power supply, if used). 4. The response time specified is for a 100 mV input step with 5 mV overdrive. 5. Maximum values are guaranteed by design and evaluation. 4/15 Doc ID 2470 Rev 9 LM2903 Electrical characteristics Figure 2. Supply current vs. supply voltage Figure 3. Input current vs. supply voltage Figure 4. Output saturation voltage vs. output current Figure 5. Response time for various input overdrives - negative transition Figure 6. Response time for various input overdrives - positive transition Doc ID 2470 Rev 9 5/15 Typical application schematics LM2903 4 Typical application schematics Figure 7. Basic comparator Figure 8. Driving CMOS 5V VCC = 5 V 100 k 15 k +V(ref) +V(ref) 1/2 LM2903 1/ 2 LM2903 VO -V(ref) -V(ref) Figure 9. & Driving TTL Figure 10. Low frequency op-amp 5V 5V 15 k 1/2 LM2903 10 k +V(ref) ~ 1/ 2 LM2903 & el eo -V(ref) 0.5 F 100 k & 1 k AV = 100 Figure 11. Low frequency op-amp with boost Figure 12. Transducer amplifier 5V 5V (eo = 0 V for el = 0 V) Magnetic pick-up 15 k 1/ 2 LM2903 ~ el 2N 2222 10 k 3 k 1/ 2 LM2903 0.5 F 20 M 100 k eo 1 k AV = 100 6/15 Doc ID 2470 Rev 9 10 k eo LM2903 Typical application schematics Figure 13. Low frequency op- amp with offset Figure 14. Zero crossing detector (single adjust power supply) 5V 5V Offset adjust 100 k 5V 100 k R2 RS 1 M 5.1 k R1 5.1 k el 15 k 1/ 2 LM2903 el ~ 5.1 k 100 k 1 M 1/ 2 LM2903 2N 2222 1N4148 0.5 F R1 100 k 1 k 20 M 10 k eo Figure 15. Limit comparator Figure 16. Split-supply applications - zero crossing detector VCC (12 V) 15 V 10 k 2RS V(ref) high 1/ 2 LM2903 5.1 k Lamp RS eI 1/2 LM2903 eI ~ 2RS 1/2 LM2903 eo ~ 2N 2222 15 V V(ref) low Figure 17. Crystal controlled oscillator Figure 18. Comparator with a negative reference VCC = 15 V 15 V 200 k 2 k 100 k 5.1 k VCC 0.1 F 1/2 LM2903 0 eo 1/2 LM2903 eI ~ eo 5V f = 100 kHz 15 V 200 k Doc ID 2470 Rev 9 7/15 Typical application schematics LM2903 Figure 19. Time delay generator VC C = +15 V 10 k 15 k 3 k 200 k 10 M 10 k 1/2 LM2903 V3 VCC V03 to t3 3 k 10 k 51 k 1/2 LM2903 VCC 0 to tA 10 M 10 k VC1 1/2 LM2903 V2 V(ref.) VO2 VCC to 0.001 F Input gating signal 3 k VCC 10 M 51 k 1/2 LM2903 V3 VC1 V2 V1 0 t 0 t1 t2 t3 10 k VCC V O1 t0 t1 V1 t 51 k t4 Figure 20. Two-decade high-frequency VCO VCC 100 k Frequency control voltage input Vcontrol 500 pF 10 k 100 k 3 k 1/ 2 LM2903 0.01 F Output 1 VCC /2 20 k Output 2 20 k 1/ 2 LM2903 VCC = + 30 V Vcontrol +50 V +250 mV 700 Hz fo 100 kHz 8/15 3 k 5.1 k 1/ 2 LM2903 0.1 F 50 k VCC Doc ID 2470 Rev 9 VCC /2 t2 LM2903 5 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK(R) is an ST trademark. Doc ID 2470 Rev 9 9/15 Package information 5.1 LM2903 DIP8 package information Figure 21. DIP8 package mechanical drawing Table 4. DIP8 package mechanical data Dimensions Ref. Millimeters Min. Typ. A Max. Min. Typ. 5.33 Max. 0.210 A1 0.38 0.015 A2 2.92 3.30 4.95 0.115 0.130 0.195 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.045 0.060 0.070 c 0.20 0.25 0.36 0.008 0.010 0.014 D 9.02 9.27 10.16 0.355 0.365 0.400 E 7.62 7.87 8.26 0.300 0.310 0.325 E1 6.10 6.35 7.11 0.240 0.250 0.280 e 2.54 0.100 eA 7.62 0.300 eB L 10/15 Inches 10.92 2.92 3.30 3.81 Doc ID 2470 Rev 9 0.430 0.115 0.130 0.150 LM2903 5.2 Package information SO-8 package information Figure 22. SO-8 package mechanical drawing Table 5. SO-8 package mechanical data Dimensions Ref. Millimeters Min. Typ. A Inches Max. Min. Typ. 1.75 0.069 A1 0.10 A2 1.25 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 0.25 Max. 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 L1 k ccc 1.04 1 0.040 8 0.10 Doc ID 2470 Rev 9 1 8 0.004 11/15 Package information 5.3 LM2903 TSSOP8 package information Figure 23. TSSOP8 package mechanical drawing Table 6. TSSOP8 package mechanical data Dimensions Ref. Millimeters Min. Typ. A Max. Min. Typ. 1.20 A1 0.05 A2 0.80 b Max. 0.047 0.15 0.002 1.05 0.031 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 D 2.90 3.00 3.10 0.114 0.118 0.122 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.177 e 0 L 0.45 aaa 1.00 0.65 k L1 12/15 Inches 0.60 0.006 0.039 0.041 0.0256 8 0 0.75 0.018 1 8 0.024 0.030 0.039 0.10 Doc ID 2470 Rev 9 0.004 LM2903 6 Ordering information Ordering information Table 7. Order codes Order code Temperature range Package Packing Marking LM2903N DIP8 Tube LM2903N LM2903D/DT SO-8 Tube or tape & reel TSSOP8 Tape & reel LM2903YDT(1) SO-8 (Automotive grade) Tape & reel LM2903YPT(2) TSSOP8 (Automotive grade) 2903 LM2903PT -40C to +125C 2903Y Tape & reel 1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent. 2. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent are on-going. Doc ID 2470 Rev 9 13/15 Revision history 7 LM2903 Revision history Table 8. Document revision history Date Revision 15-Jun-2003 1 Initial release. 2-May-2005 2 PPAP references inserted in the datasheet see table order code p1. 8-Aug-2005 3 Electrical characteristics table corrected (see Table 3 on page 4). Pin connections diagram moved to cover page. Lead-free package information added. 27-Oct-2005 4 PPAP part number added in Table 7: Order codes. 11-May-2007 5 ESD tolerance added in Table 1: Absolute maximum ratings on page 3. 6 Added Rthja and Rthjc, and ESD CDM parameters in Table 1: Absolute maximum ratings. Removed Vicm from electrical characteristics in Table 3. Reformatted package information in Section 5. Added footnotes for automotive grade parts in Table 7: Order codes. 21-Feb-2008 7 Corrected SO-8 package mechanical data. Dimension E in drawing was marked H in table. Corrected revision history (revision 6 is of January 2008, not January 2007). 03-Dec-2009 8 Added pin description on cover page. 16-Feb-2012 9 Removed LM2903YD order code from Table 7. 17-Jan-2008 14/15 Changes Doc ID 2470 Rev 9 LM2903 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY TWO AUTHORIZED ST REPRESENTATIVES, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER'S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. (c) 2012 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com Doc ID 2470 Rev 9 15/15