LM2901 Low-power quad voltage comparator Features ■ Wide single supply voltage range or dual supplies for all devices: +2 V to +36 V or ±1 V to ±18 V ■ Very low supply current (1.1 mA) independent of supply voltage (1.4 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 DIP14 (Plastic package) D SO-14 (Plastic micropackage) P TSSOP14 (Thin shrink small outline package) Description This device consists of four independent precision voltage comparators, which are designed specifically to operate from a single supply over a wide range of voltages. Operation from split power supplies is also possible. These comparators also have a unique characteristic in that the input common-mode voltage range includes the negative rail even though operated from a single power supply voltage. February 2012 Doc ID 2468 Rev 7 Q4 QFN16 3x3 (Plastic micropackage) 1/17 www.st.com 17 Pin connection and schematic diagram 1 LM2901 Pin connection and schematic diagram Figure 1. Pin connections (top view) Output 2 1 14 Output 1 2 13 O u tput 4 VCC+ Figure 2. 3 O u tput 3 12 VC C - Inverting input 1 4 11 Non-inverting input 4 Non-inverting input 1 5 10 Inverting input 4 Inverting input 2 6 9 Non-inverting input 3 Non-inverting input 2 7 8 Inverting input 3 Schematic diagram VCC 3.5 μ A 100 μA 3.5 μ A 100 μ A Non-inverting input VO Inverting input VCC 2/17 Doc ID 2468 Rev 7 LM2901 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 Value Unit ±18 to 36 V ±36 V -0.3 to +36 V Output short-circuit to ground (1) Thermal resistance junction to ambient(2) Rthja 80 105 100 45 DIP14 SO-14 TSSOP14 QFN16 3x3 °C/W Thermal resistance junction to case(2) Rthjc Tj Tstg 33 31 32 14 DIP14 SO-14 TSSOP14 QFN16 3x3 Maximum junction temperature Storage temperature range HBM: human body ESD model(3) (4) MM: machine model CDM: charged device model(5) +150 °C -65 to +150 °C 500 V 100 V 1500 V 1. Short-circuits from the output to VCC+ can cause excessive heating and eventual destruction. The maximum output current is approximately 20 mA, independent of the magnitude of VCC+. 2. Short-circuits can cause excessive heating. Destructive dissipation can result from simultaneous shortcircuits on all amplifiers. All values are typical. 3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 kΩ 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 Ω). 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. Operating conditions Symbol VCC Vicm Toper Parameter Supply voltage Common mode input voltage range Tmin ≤ Tamb ≤ Tmax Operating free-air temperature range Doc ID 2468 Rev 7 Value Unit 2 to 32 ±1 to ±16 V 0 to (VCC+ -1.5) 0 to (VCC+ -2) V -40 to +125 °C 3/17 Electrical characteristics 3 LM2901 Electrical characteristics Table 3. Symbol Vio Iio Iib Avd Electrical characteristics at VCC+ = 5 V, VCC- = GND, Tamb = 25° C (unless otherwise specified) Parameter Min. Input offset voltage (1) Typ. Max. Unit 1 7 15 mV 5 50 150 nA 25 250 400 nA Tmin ≤ Tamb ≤ Tmax Input offset current Tmin ≤ Tamb ≤ Tmax Input bias current (II+ or II-) (2) Tmin ≤ Tamb ≤ Tmax Large signal voltage gain (VCC = 15 V, RL = 15 kΩ, Vo = 1 to 11 V) 25 200 V/mV Supply current (all comparators) ICC VCC = +5 V, no load VCC = +30 V, no load Vid Differential input voltage(3) VOL Low level output voltage Vid = -1V, Isink = 4 mA 1.1 1.3 250 Tmin ≤ Tamb ≤ Tmax IOH High level output current (VCC = Vo = 30 V, Vid = 1 V) tres trel 1. VCC+ V 400 700 mV 1 Output sink current (Vid = -1 V,Vo = 1.5 V) Small signal response mA 0.1 Tmin ≤ Tamb ≤ Tmax Isink 2 2.5 6 time(4) (RL = 5.1 kΩ connected to VCC+) Large signal response time(5) TTL input (Vref = +1.4 V, RL = 5.1 kΩ to VCC+) Output signal at 50% of final value Output signal at 95% of final value nA µA 16 mA 1.3 µs 500 1 ns µs At output switch point, VO ≈ 1.4 V, RS = 0 with VCC+ from 5 V to 30 V, and over the full input commonmode 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 there is no loading charge on the reference of input lines. 3. The response time specified is for a 100 mV input step with 5 mV overdrive. 4. 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). 5. Maximum values are guaranteed by design. 4/17 Doc ID 2468 Rev 7 LM2901 Electrical characteristics Figure 3. Supply current vs. supply voltage Figure 4. Input current vs. supply voltage Figure 5. Output saturation voltage vs. output current Figure 6. Response time for various input overdrives - negative transition Figure 7. Response time for various input overdrives - positive transition Doc ID 2468 Rev 7 5/17 Typical application schematics LM2901 4 Typical application schematics Figure 8. Basic comparator Figure 9. Driving CMOS 5V VCC = 5 V 100 kΩ 15 kΩ +V(ref) +V(ref) 1/4 LM2901 VO -V(ref) Figure 10. Driving TTL 1/ 4 LM2901 & -V(ref) Figure 11. Low frequency op-amp 5V 5V 15 kΩ 10 kΩ 1/4 LM2901 +V(ref) ~ 1/ 4 LM2901 el eo & 0.5 μF 100 kΩ -V(ref) 1 kΩ & AV = 100 Figure 12. Low frequency op-amp with boost Figure 13. Transducer amplifier 5V 5V (eo = 0 V for el = 0 V) Magnetic pick-up 15 kΩ 1/ 4 LM2901 ~ el 2N 2222 10 kΩ 3 kΩ 1/ 4 LM2901 0.5 μF 20 MΩ 100 kΩ eo 1 kΩ AV = 100 6/17 Doc ID 2468 Rev 7 10 kΩ eo LM2901 Typical application schematics Figure 14. Low frequency op-amp with offset adjust Figure 15. Zero crossing detector (single power supply) 5V 5V Offset adjust 100 kΩ 5V 100 kΩ R2 1 MΩ RS 1 MΩ R1 5.1 kΩ el 15 kΩ 1/ 4 LM2901 el ~ 5.1 kΩ 100 kΩ 5.1 kΩ 1/ 4 LM2901 2N 2222 1N4148 0.5 μ F R1 100 kΩ 1 kΩ 20 MΩ 10 kΩ eo Figure 16. Limit comparator Figure 17. Split-supply applications - zero crossing detector VCC 10 kΩ 2RS V(ref) high 5.1 kΩ 1/ 4 LM2901 Lamp RS eI 15 V (12 V) 1/4 LM2901 ~ eI 2RS 1/ 4 LM139 eo ~ 2N 2222 V(ref) low 15 V Figure 18. Crystal controlled oscillator Figure 19. Comparator with a negative reference 15 V VCC = 15 V 200 kΩ 2 kΩ 100 kΩ 5.1 kΩ VCC 0.1 μF 1/ 4 LM2901 0 eo 1/ 4 LM2901 eI ~ eo f = 100 kHz 5V 200 kΩ 15 V Doc ID 2468 Rev 7 7/17 Typical application schematics LM2901 Figure 20. Time delay generator VC C = +15 V 10 kΩ 15 kΩ 3 kΩ 200 kΩ 10 MΩ 10 kΩ 1/4 LM2901 V3 V03 VCC to t3 3 kΩ 10 kΩ 51 kΩ 1/4 LM2901 VCC 0 to tA 10 MΩ 10 kΩ VC1 1/4 LM2901 V2 V(ref.) VO2 VCC to t2 0.001 μF Input gating signal 3 kΩ VCC 10 MΩ 51 kΩ 1/4 LM2901 V3 VC1 V2 V1 0 t 0 t1 t2 t3 10 kΩ V O1 VCC t0 t1 V1 t 51 kΩ t4 Figure 21. Two-decade high-frequency VCO VCC 100 kΩ Frequency control voltage input Vcontrol 500 pF 10 kΩ 100 kΩ 3 kΩ 1/ 4 LM2901 0.01 μF Output 1 VCC /2 20 kΩ Output 2 20 kΩ 1/ 4 LM2901 VCC = + 30 V Vcontrol +50 V +250 mV 700 Hz fo 100 kHz 8/17 3 kΩ 5.1 kΩ 1/ 4 LM2901 0.1 μF 50 kΩ VCC Doc ID 2468 Rev 7 VCC /2 LM2901 5 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Doc ID 2468 Rev 7 9/17 Package information 5.1 LM2901 DIP14 package information Figure 22. DIP14 package mechanical drawing Table 4. DIP14 package mechanical data Dimensions Millimeters Inches Ref. Min. Typ. A Min. Typ. 5.33 Max. 0.21 A1 0.38 0.015 A2 2.92 3.30 4.95 0.11 0.13 0.19 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.04 0.06 0.07 c 0.20 0.25 0.36 0.007 0.009 0.01 D 18.67 19.05 19.69 0.73 0.75 0.77 E 7.62 7.87 8.26 0.30 0.31 0.32 E1 6.10 6.35 7.11 0.24 0.25 0.28 e 2.54 0.10 e1 15.24 0.60 eA 7.62 0.30 eB L 10/17 Max. 10.92 2.92 3.30 3.81 Doc ID 2468 Rev 7 0.43 0.11 0.13 0.15 LM2901 5.2 Package information QFN16 3 x 3 package information Figure 23. QFN16 3 x 3 mm package mechanical drawing Doc ID 2468 Rev 7 11/17 Package information Table 5. LM2901 QFN16 3 x 3 mm package mechanical data (pitch 0.5 mm) Dimensions Ref. Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 0.80 0.90 1.00 0.031 0.035 0.039 A1 0 0.05 0 A3 0.20 b 0.18 D 2.90 D2 1.50 E 2.90 E2 1.50 e L 3.00 3.00 0.008 0.30 0.007 3.10 0.114 1.80 0.059 3.10 0.114 1.80 0.059 0.50 0.30 0.012 0.118 0.122 0.071 0.118 0.122 0.071 0.020 0.50 0.012 Figure 24. QFN16 3 x 3 mm footprint recommendation 12/17 0.002 Doc ID 2468 Rev 7 0.020 LM2901 5.3 Package information SO-14 package information Figure 25. SO-14 package mechanical drawing Table 6. SO-14 package mechanical data Dimensions Millimeters Inches Ref. Min. Typ. Max. Min. Typ. Max. A 1.35 1.75 0.05 0.068 A1 0.10 0.25 0.004 0.009 A2 1.10 1.65 0.04 0.06 B 0.33 0.51 0.01 0.02 C 0.19 0.25 0.007 0.009 D 8.55 8.75 0.33 0.34 E 3.80 4.0 0.15 0.15 e 1.27 0.05 H 5.80 6.20 0.22 0.24 h 0.25 0.50 0.009 0.02 L 0.40 1.27 0.015 0.05 k ddd 8° (max.) 0.10 Doc ID 2468 Rev 7 0.004 13/17 Package information 5.4 LM2901 TSSOP14 package information Figure 26. TSSOP14 package mechanical drawing Table 7. TSSOP14 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 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 D 4.90 5.00 5.10 0.193 0.197 0.201 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.176 e L k aaa 1.00 0.65 0.45 L1 14/17 Inches 0.60 0.0256 0.75 0.018 1.00 0° 0.024 0.030 0.039 8° 0.10 Doc ID 2468 Rev 7 0° 8° 0.004 LM2901 6 Ordering information Ordering information Table 8. Order codes Order code Temperature range Package Packing Marking LM2901N DIP14 Tube LM2901N LM2901D LM2901DT SO-14 Tube or tape & reel LM2901PT TSSOP14 Tape & reel QFN16 3x3 Tape & reel LM2901YDT(1) SO-14 (Automotive grade) Tape & reel LM2901YPT(1) TSSOP14 (Automotive grade) Tape & reel LM2901Q4T 2901 -40°C to +125°C K5I 2901Y 1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent. Doc ID 2468 Rev 7 15/17 Revision history 7 LM2901 Revision history Table 9. 16/17 Document revision history Date Revision Changes 01-Jan-2002 1 Initial release. 01-Jul-2005 2 1 - PPAP references inserted in the datasheet see Table : Order codes on page 1. 2 - ESD protection inserted in Table 1 on page 3. 01-Oct-2005 3 The following changes were made in this revision: – PPAP part number added in table Order codes on page 1. – Formatting changes throughout. 18-Jul-2006 4 ESD HBM value corrected in Table 1 on page 3. 19-Dec-2007 5 Added Rthja and Rthjc parameters to Table 1: Absolute maximum ratings. Added footnotes for ESD parameters. Removed Vicm parameter from electrical characteristics in Table 3. Reformatted package information in Section 5. Added footnotes for automotive grade parts in Table 8: Order codes. 30-Apr-2009 6 Document reformatted. Updated package information in Chapter 5: Package information. Removed note 2 under Table 8: Order codes. 06-Feb-2012 7 Added QFN16 3 x 3 package in Chapter 5. Removed LM2901YD order code from Table 8. Doc ID 2468 Rev 7 LM2901 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. 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