LM2903

Part: LM393DR (LM393 series, ordered as LM393DR2G) — onsemi

Type: Dual Voltage Comparator

Description: Dual independent precision comparator with 2.0–36 V single-supply (±1.0 to ±18 V split) operation, 0.4 mA typical supply current, and input common-mode range down to ground.

Operating Conditions:

• Supply voltage: 2.0–36 V single supply, or ±1.0 to ±18 V split supply
• Operating temperature: 0 to +70 °C for LM393/LM393E (suffix-dependent: LM293 -25 to +85 °C, LM2903/E -40 to +105 °C, LM2903V/NCV2903 -40 to +125 °C)
• Input common-mode range: 0 V to VCC − 1.5 V (TA = 25 °C)

Absolute Maximum Ratings:

• Input differential voltage: 36 V
• Input common-mode voltage range: -0.3 to +36 V
• Output voltage: 36 V
• Output sink current: 20 mA
• Power dissipation at TA = 25 °C: 570 mW (derate 5.7 mW/°C)
• Max operating junction temperature: 150 °C
• Storage temperature: -65 to +150 °C

Key Specs:

• Input offset voltage (LM393, VCC = 5 V, TA = 25 °C): ±1.0 mV typ, ±5.0 mV max; ±9.0 mV max over 0 to +70 °C
• Input offset current (TA = 25 °C): ±5.0 nA typ, ±50 nA max; ±150 nA max over temperature
• Input bias current (TA = 25 °C): 20 nA typ, 250 nA max; 400 nA max over temperature
• Voltage gain (LM393): 200 V/mV typ, 50 V/mV min
• Response time (100 mV step, 5 mV overdrive, RL = 5.1 kΩ, TA = 25 °C): 1.3 μs typ
• Large-signal response time (TTL logic swing input, Vref = 1.4 V): 300 ns typ
• Output sink current (Vin− ≥ 1.0 V, Vin+ = 0, VO ≤ 1.5 V, TA = 25 °C): 6.0 mA min, 16 mA typ
• Output saturation voltage (ISink ≤ 4.0 mA, TA = 25 °C): 150 mV typ, 400 mV max
• Supply current (both comparators, RL = ∞, TA = 25 °C): 0.4 mA typ, 1.0 mA max; 2.5 mA max at VCC = 30 V

Features:

• Split-supply range ±1.0 to ±18 V; single-supply range 2.0 to 36 V
• Supply current of 0.4 mA, independent of supply voltage
• Differential input voltage range equal to the power supply voltage
• Input common-mode range to ground level
• Output compatible with DTL, ECL, TTL, MOS and CMOS logic levels
• ESD clamps on the inputs
• NCV prefix for automotive use: AEC-Q100 qualified and PPAP capable
• Pb-free, halogen free/BFR free and RoHS compliant

Applications:

• Consumer, automotive and industrial electronics
• Zero crossing detectors
• Square-wave oscillators
• Time delay generators
• Comparators with hysteresis

Package:

• SOIC-8 (Case 751)
• PDIP-8 (Case 626)
• Micro8 (Case 846A)

• Split -Supply Range: ± 1.0 Vdc to ± 18 Vdc
• Wide Single -Supply Range: 2.0 Vdc to 36 Vdc
• Very Low Current Drain Independent of Supply Voltage: 0.4 mA
• Low Input Offset Current: 5.0 nA
• Low Input Bias Current: 25 nA
• Low Input Offset Voltage: 5.0 mV (max) LM293/393
• Differential Input Voltage Range Equal to Power Supply Voltage
• Input Common Mode Range to Ground Level
• Output Voltage Compatible with DTL, ECL, TTL, MOS, and CMOS Logic Levels
• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC -Q100 Qualified and PPAP Capable
• ESD Clamps on the Inputs Increase the Ruggedness of the Device without Affecting Performance
• These Devices are Pb -Free, Halogen Free/BFR Free and are RoHS Compliant

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Micro8 E DM SUFFIX CASE 846A

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These dual comparators feature high gain, wide bandwidth characteristics. This gives the device oscillation tendencies if the outputs are capacitively coupled to the inputs via stray capacitance. This oscillation manifests itself during output transitions (V OL to V OH ). To alleviate this situation, input resistors <10 k W should be used.

D1 prevents input from going negative by more than 0.6 V.

Figure 8. Zero Crossing Detector (Single Supply)

The addition of positive feedback (<10 mV) is also recommended. It is good design practice to ground all unused pins.

Differential input voltages may be larger than supply voltage without damaging the comparator's inputs. V oltages more negative than -0.3 V should not be used.

Vin(min) [ 0.4 V peak for 1% phase distortion ( DQ ).

Figure 10. Free -Running Square -Wave Oscillator

Figure 9. Zero Crossing Detector (Split Supply)

Figure 11. Time Delay Generator

Figure 12. Comparator with Hysteresis

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected.

1. The maximum output current may be as high as 20 mA, independent of the magnitude of V CC , output short circuits to V CC can cause excessive heating and eventual destruction.

2. NCV2903 is qualified for automotive use.