LM2903

LM2903 LOW POWER DUAL VOLTAGE COMPARATORS ■ WIDE SINGLE SUPPLY VOLTAGE RANGE OR DUAL SUPPLIES +2V TO +36V OR ±1V TO ±18V ■ VERY LOW SUPPLY CURRENT (0.4mA) INDEPENDENT OF SUPPLY VOLTAGE (1mW/comparator at +5V) ■ LOW INPUT BIAS CURRENT: 25nA TYP LM2903N ■ LOW INPUT OFFSET CURRENT: ±5nA TYP DIP8 ■ INPUT COMMON-MODE VOLTAGE RANGE INCLUDES GROUND ■ LOW OUTPUT SATURATION VOLTAGE: 250mV TYP. (IO = 4mA) ■ DIFFERENTIAL INPUT VOLTAGE RANGE LM2903 EQUAL TO THE SUPPLY VOLTAGE SOP8 ■ 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. www.slkormicro.com   1 LM2903P TSSOP8 PIN CONNECTIONS (top view) 1OUT VCC 1IN− 2OUT 1IN+ 2IN− GND 2IN+ LM2903 SCHEMATIC DIAGRAM (1/2 LM2903) VCC+ 3.5µA 100µA 3.5µA 100µA Non-Inverting Input Vo VCC- VCC- Inverting Input VCC- ABSOLUTE MAXIMUM RATINGS Symbol Parameter VCC Supply Voltage VID Differential Input Voltage VI Input Voltage Output Short-circuit to Ground Power Dissipation 2) Pd 1) Unit ±18 to 36 V ±36 V -0.3 to +36 V Infinite DIP8 SO8 TSSOP8 TJunction Junction Temperature Tstg Value Storage Temperature Range 1250 710 625 mW +150 °C -65 to +150 °C 1. 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 + 2. 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 Parameter Vicm Common Mode Input Voltage Range Toper Operating Free-Air Temperature range www.slkormicro.com   Value + 2 Unit 0 to VCC -1.5 V -40 to +125 °C LM2903 ELECTRICAL CHARACTERISTICS VCC+ = 5V, V cc- = GND, Tamb = 25°C (unless otherwise specified) Symbol Parameter Typ. Max. Unit VIO Input Offset Voltage 1) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. 1 7 15 mV IIO Input Offset Current Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. 5 50 150 nA IIB Input Bias Current 2) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. 25 250 400 nA AVD Large Signal Voltage Gain (Vcc = 15V,RL=15kΩ, Vo=1 to 11V) ICC Supply Current (all comparators) VCC = 5V, no load VCC = 30V, no load VICM VID VOL IOH ISINK 25 0 0 Differential Input Voltage 4) Low Level Output Voltage (Vid = -1V, Isink = 4mA) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax 250 High Level Output Current (VCC =Vo =30V, Vid = 1V) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax Output Sink Current (Vid = -1V,Vo = 1.5V) 5) 200 0.4 1 Input Common Mode Voltage Range (Vcc= 30V) 3) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax. Small Signal Response Time 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 (RL = 5.1kΩ to VCC ) V/mV 1 2.5 mA VCC+-1.5 VCC+-2 V VCC+ V 400 700 mV 0.1 1 6 + tRE nA µA 16 mΑ 1.3 µs 500 1 ns µs 1. 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). 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. 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. 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 –0.3V (or 0.3V below the negative power supply, if used) 5. The response time specified is for a 100mV input step with 5mV overdrive. 6. Maximum values are guaranteed by design & evaluation. www.slkormicro.com   Min. 3 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 www.slkormicro.com   4 LM2903 TYPICAL APPLICATIONS BASIC COMPARATOR LOW FREQUENCY OP AMP DRIVING CMOS LOW FREQUENCY OP AMP DRIVING TTL TRANSDUCER AMPLIFIER www.slkormicro.com   5 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 www.slkormicro.com   6