LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 D D D D D D D OR P PACKAGE (TOP VIEW) Fast Response Times Improved Gain and Accuracy Fanout to 10 Series 54/74 TTL Loads Strobe Capability Short-Circuit and Surge Protection Designed to Be Interchangeable With National Semiconductor LM306 GND IN + IN – VCC – description 1 8 2 7 3 6 4 5 VCC+ OUT STROBE 2 STROBE 1 functional block diagram The LM306 is a high-speed voltage comparator with differential inputs, a low-impedance highsink-current (100 mA) output, and two strobe inputs. This device detects low-level analog or digital signals and can drive digital logic or lamps and relays directly. Short-circuit protection and surge-current limiting is provided. STROBE 1 STROBE 2 IN+ OUT IN – A low-level input at either strobe causes the output to remain high regardless of the differential input.When both strobe inputs are either open or at a high logic level, the output voltage is controlled by the differential input voltage. The circuit will operate with any negative supply voltage between – 3 V and – 12 V with little difference in performance. The LM306 is characterized for operation from 0°C to 70°C. AVAILABLE OPTIONS PACKAGE TA 0°C to 70°C VIOmax at 25 C 25°C SMALL OUTLINE (D) PLASTIC DIP (P) LM306D LM306P 5 mV Copyright 1991, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 schematic STROBE 2 STROBE 1 VCC + 5 kΩ 5 kΩ 6.3 V 6.3 V 300 Ω 300 Ω 6.3 V 6.3 V 3.5 kΩ IN + 70 Ω OUT 6.3 V IN – 600 Ω 3Ω 17 kΩ GND 600 Ω VCC – Resistor values are nominal. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC + (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V Supply voltage, VCC – (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V Differential input voltage, VID (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 5 V Input voltage, VI (either input, see Notes 1 and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 7 V Strobe voltage range (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to VCC+ Output voltage, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 V Voltage from output to VCC – . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V Duration of output short circuit to ground (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 s Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values, except differential voltages and the voltage from the output to VCC –, are with respect to the network ground. 2. Differential voltages are at IN+ with respect to IN –. 3. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 7 V, whichever is less. 4. The output may be shorted to ground or either power supply. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR DERATE ABOVE TA TA = 70°C POWER RATING D P 600 mW 600 mW 5.8 mW/°C 8.0 mW/°C 46°C 75°C 464 mW 600 mW POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 electrical characteristics at specified free-air temperature, VCC+ = 12 V, VCC– = –3 V to –12 V (unless otherwise noted) PARAMETER TEST CONDITIONS† TA‡ 25°C VIO Input offset voltage RS ≤ 200 Ω αVIO Average temperature coefficient of input offset voltage RS = 50 Ω, IIO Input offset current See Note 5 αIIO Average g temperature coefficient of input offset current See Note 5 IIB Input bias current VO = 0.5 0 5 V to 5 V IIL(S) VIH(S) Low-level strobe current V(strobe) = 0.4 V High-level strobe voltage Full range VIL(S) VICR Low-level strobe voltage Full range VID Differential input voltage range AVD Large-signal differential voltage amplification VOH VOL IOH Common-mode input voltage range TYP 1.6§ Full range See Note 5 5 5 20 25°C 1.8 5 MIN 1 7.5 MAX 0.5 5 MIN to 25°C 24 100 25°C to MAX 15 50 MIN to 25°C 40 25°C to MAX Full range VCC – = – 7 V to – 12 V MAX 6.5 Full range 16 25 – 1.7 – 3.2 2.2 UNIT mV µV/°C µA nA /°C µA mA V 0.9 V Full range ±5 V Full range ±5 V VO = 0.5 V to 5 V, No load High-level output voltage IOH = – 400 µA IOL = 100 mA VID = 8 mV VID = – 7 mV Full range Low-level output voltage IOL = 50 mA IOL = 16 mA VID = – 7 mV VID = – 8 mV Full range VOH = 8 V to 24 V VD = 7 mV VID = 8 mV High level output voltage High-level MIN 25°C 40 2.5 25°C V/mV 5.5 0.8 2 1 Full range V V 0.4 MIN to 25°C 0.02 25°C to MAX 2 100 µA ICC + Supply current from VCC + VID = – 5 mV, No load Full range 6.6 10 mA ICC – Supply current from VCC – No load Full range – 1.9 – 3.6 mA † Unless otherwise noted, all characteristics are measured with both strobes open. ‡ Full range is 0°C to 70°C. MIN is 0°C. MAX is 70°C. § This typical value is at VCC+ = 12 V, VCC – = – 6 V. NOTE 5: The offset voltages and offset currents given are the maximum values required to drive the output down to the low range (VOL) or up to the high range (VOH). These parameters actually define an error band and take into account the worst-case effects of voltage gain and input impedance. switching characteristics, VCC+ = 12 V, VCC– = –6 V, TA = 25°C PARAMETER TEST CONDITIONS† MIN TYP MAX UNIT Response time, low-to-high-level output RL = 390 Ω to 5 V, CL = 15 pF, See Note 6 28 40 ns † All characteristics are measured with both strobes open. NOTE 6: The response time specified is for a 100-mV input step with 5-mV overdrive and is the interval between the input step function and the instant when the output crosses 1.4 V. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 TYPICAL CHARACTERISTICS Table of Graphs FIGURE IIB IIO Input bias current vs Free-air temperature 1 Input offset current vs Free-air temperature 2 VOH VOL High-level output voltage vs Free-air temperature 3 Low-level output voltage vs Free-air temperature 4 VO IO Output voltage vs Differential input voltage 5 Output current vs Differential input voltage 6 AVD IOS Large-signal differential voltage amplification vs Free-air temperature 7 Short-circuit output current vs Free-air temperature 8 Output response vs Time ICC+ ICC– Positive supply current vs Positive supply voltage 9, 10 11 Negative supply current vs Negative supply voltage 12 PD Total power dissipation vs Free-air temperature 13 INPUT OFFSET CURRENT vs FREE-AIR TEMPERATURE 3 20 VCC+ = 12 V VCC – = – 6 V VO = 0.5 V to 5 V VCC+ = 12 V VCC – = – 6 V VO = 0.5 V to 5 V 18 I IB – Input Bias Current – µ A 2.5 I IO – Input Offset Current – µ A INPUT BIAS CURRENT vs FREE-AIR TEMPERATURE 2 1.5 1 0.5 16 14 12 10 8 6 4 2 0 0 10 20 30 40 50 60 70 0 0 10 TA – Free Air Temperature – °C 20 30 40 50 60 TA – Free-Air Temperature – °C 70 Figure 2 Figure 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 TYPICAL CHARACTERISTICS HIGH-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE LOW-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 1.2 VCC + = 12 V VCC – = – 3 V to – 12 V VID = 8 mV 6 VOL – Low-Level Output Voltage – V VOH – High-Level Output Voltage – V 7 IOH = 0 5 4 IOH = – 400 µA 3 2 1 0 10 20 30 40 50 60 TA – Free-Air Temperature – °C VCC + = 12 V VCC – = – 3 V to – 12 V VID = – 8 mV 1 0.8 IOL = 100 mA 0.6 IOL = 50 mA 0.4 IOL = 16 mA 0.2 IOL = 0 0 70 0 10 OUTPUT VOLTAGE vs DIFFERENTIAL INPUT VOLTAGE OUTPUT CURRENT vs DIFFERENTIAL INPUT VOLTAGE 10 7 10 – 1 TA = 0°C TA = 25°C TA = 70°C 3 2 1 TA = 70°C TA = 25°C 10 – 2 10 – 3 10 – 4 10 – 5 TA = 70°C 10 – 6 TA = 25°C 10 – 7 0 –1 –2 TA = 0°C 1 I O – Output Current – A VO – Output Voltage – V VCC + = 12 V VCC – = – 6 V RL = ∞ 5 4 10 – 8 –1 0 1 VID – Differential Input Voltage – mV 2 VCC+ = VO = 12 V VCC– = – 3 V to – 12 V 10 – 9 –5 –4 –3 –2 Figure 6 POST OFFICE BOX 655303 –1 TA = 0°C 0 1 VID – Differential Input Voltage – mV Figure 5 6 70 Figure 4 Figure 3 6 20 30 40 50 60 TA – Free-Air Temperature – °C • DALLAS, TEXAS 75265 2 3 LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 TYPICAL CHARACTERISTICS LARGE-SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION vs FREE-AIR TEMPERATURE SHORT-CIRCUIT OUTPUT CURRENT vs FREE-AIR TEMPERATURE 0.4 ÁÁ ÁÁ ÁÁ VCC – = – 3 V to – 12 V VO = 1 to 2 V RL = ∞ I OS – Short-Circuit Output Current – A AVD AVD – Large-Signal Differential Voltage Amplification 80,000 60,000 VCC+ = 15 V 40,000 VCC+ = 10 V VCC+ = 15 V 20,000 VCC + = VO = 12 V VCC – = – 6 V VID = – 8 mV See Note A 0.3 0.2 0.1 0 0 0 10 20 30 40 50 TA – Free-Air Temperature – °C 60 0 70 10 20 30 40 50 60 70 TA – Free-Air Temperature – °C NOTE A: This parameter was measured using a single 5-ms pulse. Figure 8 Figure 7 100 mV VCC + = 12 V VCC – = – 6 V CL = 15 pF RL = 390 Ω to 5 V TA = 25°C 4 20 mV 3 10 mV 2 5 mV 100 mV 5 VO – Output Voltage – V 5 VO – Output Voltage – V OUTPUT RESPONSE FOR VARIOUS INPUT OVERDRIVES Differential Input Voltage Differential Input Voltage OUTPUT RESPONSE FOR VARIOUS INPUT OVERDRIVES 2 mV 1 20 mV 4 3 10 mV 2 VCC + = 12 V VCC – = – 6 V CL = 15 pF RL = 390 Ω to 5 V TA = 25°C 5 mV 2 mV 3 0 0 0 20 40 60 80 0 100 t – Time – ns 20 40 60 t – Time – ns 80 100 Figure 10 Figure 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 LM306 DIFFERENTIAL COMPARATOR WITH STROBES SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991 TYPICAL CHARACTERISTICS POSITIVE SUPPLY CURRENT vs POSITIVE SUPPLY VOLTAGE NEGATIVE SUPPLY CURRENT vs NEGATIVE SUPPLY VOLTAGE 4 10 I CC+ – Positive Supply Current – mA 9 8 ICC – – Negative Supply Current – mA VCC – = – 3 V to – 12 V RL = ∞ TA = 25°C VID = – 5 mV 7 6 5 VID = 5 mV 4 3 2 VCC + = 12 V RL = ∞ TA = 25°C 3 2 1 1 0 9 10 11 12 13 14 15 16 0 17 0 –2 VCC + – Positive Supply Voltage – V –4 –6 Figure 12 Figure 11 TOTAL POWER DISSIPATION vs FREE-AIR TEMPERATURE PD – Total Power Dissipation – mW 120 VCC + = 12 V VCC – = – 6 V RL = ∞ 100 VID = – 8 mV 80 VID = 8 mV 60 40 20 0 0 10 20 40 50 60 30 TA – Free-Air Temperature – °C Figure 13 8 –8 – 10 – 12 – 14 VCC – – Negative Supply Voltage – V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 70 – 16 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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