Datasheet

ManualsBrandsST ManualsAmplifiers & ComparatorsComparator Dual SO-8

February 2008 Rev 7 1/14

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. (I

= 4 mA)

■ Differential input voltage range equal to the

supply voltage

■ TTL, DTL, ECL, MOS, CMOS compatible

outputs

Description

This device consists of two independent low

power voltage comparators 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: the input common-mode voltage

range includes the negative rail even though

operated from a single power supply voltage.

DIP8

(Plastic package)

SO-8

(Plastic micropackage)

TSSOP8

(Thin shrink small outline package)

Pin connections (top view)

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Summary of content (14 pages)

PAGE 1
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.
PAGE 2
Schematic diagram 1 LM2903 Schematic diagram Figure 1. Schematic diagram (1/2 LM2903) VCC+ 3.5µA 100µA 3.
PAGE 3
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.
PAGE 4
Electrical characteristics LM2903 3 Electrical characteristics Table 3. VCC+ = 5V, VCC- = GND, Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. Max.
PAGE 5
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.
PAGE 6
Typical application schematics LM2903 4 Typical application schematics Figure 7. Basic comparator Figure 8. Figure 9. Driving TTL Figure 10. Low frequency op-amp Figure 11. Low frequency op-amp 6/14 Driving CMOS Figure 12.
PAGE 7
LM2903 Typical application schematics Figure 13. Low frequency op- amp with offset Figure 14. Zero crossing detector (single adjust power supply) Figure 15. Limit comparator Figure 16. Split-supply applications - zero crossing detector Figure 17. Split-supply applications - crystal controlled oscillator Figure 18.
PAGE 8
Typical application schematics Figure 19.
PAGE 9
LM2903 5 Package information Package information In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark.
PAGE 10
Package information 5.1 LM2903 DIP8 package information Figure 20. 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.
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LM2903 5.2 Package information SO-8 package information Figure 21. 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.
PAGE 12
Package information 5.3 LM2903 TSSOP8 package information Figure 22. TSSOP8 package mechanical drawing Table 6. TSSOP8 package mechanical data Dimensions Ref. Millimeters Min. Typ. A Max. Min. Typ. 1.2 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 12/14 Inches 1.00 0.65 k 0° L 0.45 0.
PAGE 13
LM2903 6 Ordering information Ordering information Table 7. Order codes Temperature range Order code Package Packing Marking LM2903N DIP8 Tube LM2903N LM2903D/DT SO-8 Tube or tape & reel TSSOP8 Tape & reel SO-8 (Automotive grade) Tube or tape & reel 2903 LM2903PT LM2903YD(1) LM2903YDT(1) -40°C to +125°C 2903Y TSSOP8 (Automotive grade) (2) LM2903YPT Tape & reel 1.
PAGE 14
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.