LM2903

LM2903 LOW POWER DUAL VOLTAGE COMPARATORS s WIDE SINGLE SUPPLY VOLTAGE RANGE OR DUAL SUPPLIES +2V TO +36V OR ±1V TO ±18V s VERY LOW SUPPLY CURRENT (0.4mA) INDEPENDENT OF SUPPLY VOLTAGE (1mW/comparator at +5V) s LOW INPUT BIAS CURRENT: 25nA TYP s LOW INPUT OFFSET CURRENT: ±5nA TYP s INPUT COMMON-MODE VOLTAGE RANGE INCLUDES GROUND N DIP8 (Plastic Package) s LOW OUTPUT SATURATION VOLTAGE: 250mV TYP. (IO = 4mA) s DIFFERENTIAL INPUT VOLTAGE RANGE EQUAL TO THE SUPPLY VOLTAGE s 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 in that the input common-mode voltage range includes ground even though operated from a single power supply voltage. ORDER CODE Part Number LM2903 Temperature Range -40°C, +125°C Package N • D • P • D SO8 (Plastic Micropackage) P TSSOP8 (Thin Shrink Small Outline Package) PIN CONNECTIONS (top view) N = Dual in Line Package (DIP) D = Small Outline Package (SO) - also available in Tape & Reel (DT) P = T hin Shrink Small Outline Package (TSSOP) - only available in Tape & Reel (PT) June 2003 1/9 LM2903 SCHEMATIC DIAGRAM (1/2 LM2903) VCC+ 3.5µA 100µA 3.5µA 100µA Non-Inverting Input Vo VCCInverting Input VCC- VCC- ABSOLUTE MAXIMUM RATINGS Symbol VCC VID VI Supply Voltage Differential Input Voltage Input Voltage Output Short-circuit to Ground Power Dissipation 2) Pd TJunction Junction Temperature Tstg 1. 2. Parameter Value ±18 to 36 ±36 -0.3 to +36 Unit V V V 1) Infinite 1250 710 625 +150 -65 to +150 mW °C °C DIP8 SO8 TSSOP8 Storage Temperature Range Short-circuit from the output to Vcc+ can cause excessive heating and eventual destruction. The maximum output current is approximately 20mA, independent of the magnitude of Vcc + Pd is calculated with T amb = +25°C, Tj = +150°C and R thja = 100°C/W for DIP8 package = 175°C/W for SO8 package = 200°C/W for TSSOP8 package OPERATING CONDITIONS Symbol Vicm Toper Parameter Common Mode Input Voltage Range Operating Free-Air Temperature range Value 0 to VCC -1.5 -40 to +125 + Unit V °C 2/9 LM2903 ELECTRICAL CHARACTERISTICS VCC+ = 5V, V cc- = GND, Tamb = 25°C (unless otherwise specified) Symbol VIO Input Offset Voltage 1) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. Input Offset Current Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. Input Bias Current 2) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. Large Signal Voltage Gain (Vcc = 15V,RL=15kΩ, Vo=1 to 11V) Supply Current (all comparators) VCC = 5V, no load VCC = 30V, no load Input Common Mode Voltage Range (Vcc= 30V) 3) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. Differential Input Voltage 4) Low Level Output Voltage (Vid = -1V, Isink = 4mA) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax High Level Output Current (VCC =Vo =30V, Vid = 1V) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax Output Sink Current (Vid = -1V,Vo = 1.5V) Small Signal Response Time 5) Parameter Min. Typ. 1 Max. 7 15 50 150 250 400 Unit mV IIO 5 nA IIB AVD ICC 25 25 200 0.4 1 0 0 nA V/mV 1 2.5 VCC+-1.5 VCC+-2 VCC+ mA VICM VID VOL V V mV 250 400 700 IOH ISINK tRE 0.1 1 6 16 1.3 nA µA mΑ µs (RL = 5.1kΩ to VCC ) + tREL Large Signal Response Time 6) TTL Input (Vref = +1.4 V, RL=5.1kΩ to VCC+) Output Signal at 50% of final value Output Signal at 95 % of final value 500 1 ns µs 1. 2. 3. 4. At output switch point, VO ≈ 1.4V, RS = 0Ω with VCC+ from 5V to 30V, and over the full input common-mode range (0V to VCC+ –1.5V). 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 The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode voltage range is VCC+ –1.5V, but either or both inputs can go to +30V without damage. 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 –0.3V (or 0.3V below the negative power supply, if used) The response time specified is for a 100mV input step with 5mV overdrive. Maximum values are guaranteed by design & evaluation. 5. 6. 3/9 LM2903 SUPPLY CURRENT versus SUPPLY VOLTAGE RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES - NEGATIVE TRANSITION INPUT CURRENT versus SUPPLY VOLTAGE RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES - POSITIVE TRANSITION OUTPUT SATURATION VOLTAGE versus OUTPUT CURRENT 4/9 LM2903 TYPICAL APPLICATIONS BASIC COMPARATOR LOW FREQUENCY OP AMP DRIVING CMOS LOW FREQUENCY OP AMP DRIVING TTL TRANSDUCER AMPLIFIER 5/9 LM2903 LOW FREQUENCY OP AMP WITH OFFSET ADJUST ZERO CROSSING DETECTOR (single power supply) TWO-DECADE HIGH-FREQUENCY VCO LIMIT COMPARATOR CRYSTAL CONTROLLED OSCILLATOR SPLIT-SUPPLY APPLICATIONS ZERO CROSSING DETECTOR COMPARATOR WITH A NEGATIVE REFERENCE 6/9 LM2903 PACKAGE MECHANICAL DATA Plastic DIP-8 MECHANICAL DATA mm. DIM. MIN. A a1 B B1 b b1 D E e e3 e4 F I L Z 0.44 3.3 1.6 0.017 8.8 2.54 7.62 7.62 7.1 4.8 0.130 0.063 0.38 0.7 1.39 0.91 0.5 0.5 9.8 0.346 0.100 0.300 0.300 0.280 0.189 0.015 1.65 1.04 TYP 3.3 0.028 0.055 0.036 0.020 0.020 0.386 0.065 0.041 MAX. MIN. TYP. 0.130 MAX. inch P001F 7/9 LM2903 PACKAGE MECHANICAL DATA SO-8 MECHANICAL DATA DIM. A A1 A2 B C D E e H h L k ddd 0.1 5.80 0.25 0.40 mm. MIN. 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 6.20 0.50 1.27 8˚ (max.) 0.04 0.228 0.010 0.016 TYP MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 MIN. 0.053 0.04 0.043 0.013 0.007 0.189 0.150 0.050 0.244 0.020 0.050 inch TYP. MAX. 0.069 0.010 0.065 0.020 0.010 0.197 0.157 0016023/C 8/9 LM2903 PACKAGE MECHANICAL DATA TSSOP8 MECHANICAL DATA mm. DIM. MIN. A A1 A2 b c D E E1 e K L L1 0˚ 0.45 0.60 1 0.05 0.80 0.19 0.09 2.90 6.20 4.30 3.00 6.40 4.40 0.65 8˚ 0.75 0˚ 0.018 0.024 0.039 1.00 TYP MAX. 1.2 0.15 1.05 0.30 0.20 3.10 6.60 4.50 0.002 0.031 0.007 0.004 0.114 0.244 0.169 0.118 0.252 0.173 0.0256 8˚ 0.030 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.008 0.122 0.260 0.177 inch 0079397/D Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 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