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Y Eliminates input current errors Y Interchangeable with LM111 Y No need for input current buffering Schematic Diagram TL/H/5703 2 Note: Do Not Ground Strobe Pin or Balance/Strobe Pin. See Note 7. Connection Diagram Metal Can Package TL/H/5703 1 Top View Order Number LF111H, LF111H-MIL or LF311H See NS Package Number H08C C1995 National Semiconductor Corporation RRD B30M115/Printed in U S A

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. (Note 8) LF111/LF211 LF311 Total Supply Voltage (V 84) 36V 36V Output to Negative Supply Voltage (V 74) 50V 40V Ground to Negative Supply Voltage (V 14) 30V 30V Differential Input Voltage g30V g30V Input Voltage (Note 1) g15V g15V Power Dissipation (Note 2) 500 mW 500 mW Output Short Circuit Duration 10 seconds 10 seconds LF111/LF211 LF311 Operating Temp. Range LF111 b55§Ct o a125§C LF211 b25§Ct o a85§C LF311 0 §Ct o a70§C Storage Temp. Range b65§Ct o a150§C b65§Ct o a150§C Lead Temp. (Soldering, 10 seconds) 260 §C 260§C ESD rating to be determined. Parameter Conditions Min Typ Max Units Input Offset Voltage (Note 4) T A 25§C, R S s 50k 0.7 4.0 mV Input Offset Current (Note 4) T A 25§C, V CM 0 (Note 6) 5.0 25 pA Input Bias Current TA 25§C, V CM 0 (Note 6) 20 50 pA Voltage Gain TA 25§C 40 200 V/mV Response Time (Note 5) TA 25§C 200 ns Saturation Voltage VINsb5.0 mV, I OUT 50 mA, T A 25§C 0.75 1.5 V Strobe On Current TA 25§C 3.0 mA Output Leakage Current VINs5.0 mV, V OUT 35V, T A 25§C 0.2 10 nA Input Offset Voltage (Note 4) R S s 50k 6.0 mV Input Offset Current (Note 4) V S g15V, V CM 0 (Note 6) 2.0 3.0 nA Input Bias Current VS g15V, V CM 0 (Note 6) 5.0 7.0 nA Input Voltage Range b13.5 g14 13.0 V Saturation Voltage Vat4.5V, V 0 0.23 0.4 V VINsb6.0 mV, I OUTs8.0 mA Output Leakage Current VINt5.0 mV, V OUT 35V 0.1 0.5 mA Positive Supply Current TA 25§C 5.1 6.0 mA Negative Supply Current TA 25§C 4.1 5.0 mA Note 1: This rating applies for g15V supplies. The positive input voltage limit is 30V above the negative supply. The negative input voltage limit is equal to the negative supply voltage or 30V below the positive supply, whichever is less. Note 2: The maximum junction temperature of the LF111 is a150§C, the LF211 is a110§C and the LF311 is a85§C. For operating at elevated temperatures, devices in the H08 package must be derated based on a thermal resistance of a65§C/W junction to ambient (in 400 linear feet/min air flow), a165§C/W junction to ambient (in static air), or a20§C/W junction to case. Note 3: These specifications apply for V S g15V, and the Ground pin at ground, and 55 §CsTAsa125§C for the LF111, unless otherwise stated. With the LF211, however, all temperature specifications are limited to 25§CsTAsg85§C and for the LF311 0 §CsTAsa70§C. The offset voltage, offset current and bias current specifications apply for any supply voltage from a single 5.0V supply up to g15V supplies. Note 4: The offset voltages and offset currents given are the maximum values required to drive the output within a volt of either supply with a 1.0 mA load. Thus, these parameters define an error band and take into account the worst case effects of voltage gain and input impedance. Note 5: The response time specified (see definitions) is for a 100 mV input step with 5.0 mV overdrive. Note 6: For input voltages greater than 15V above the negative supply the bias and offset currents will increaseÐsee typical performance curves. Note 7: This specification gives the current that must be drawn from the strobe pin to ensure the output is properly disabled. Do not short the strobe pin to ground; it should be current driven at 3 to 5 mA. Note 8: Refer to RETSF111X for LF111H military specifications.

Parameter Conditions Min Typ Max Units Input Offset Voltage (Note 4) T A 25§C, R Ss50k 2.0 10 mV Input Offset Current (Note 4) T A 25§C, V CM 0 (Note 6) 5.0 75 pA Input Bias Current TA 25§C, V CM 0 (Note 6) 25 150 pA Voltage Gain TA 25§C 200 V/mV Response Time (Note 5) TA 25§C 200 ns Saturation Voltage VINsb10 mV, I OUT 50 mA, T A 25§C 0.75 1.5 V Strobe On Current TA 25§C 3.0 mA Output Leakage Current VINt10mV, V OUT 35V, T A 25§C 0.2 10 nA Input Offset Voltage (Note 4) R Ss50k 15 mV Input Offset Current (Note 4) V S g15V, V CM 0 (Note 6) 1.0 nA Input Bias Current VS 15V, V CM 0 (Note 6) 3.0 nA Input Voltage Range a14 V b13.5 V Saturation Voltage Vat4.5V, V 0 VINsb10 mV, I OUTs8.0 mA 0.23 0.4 V Positive Supply Current TA 25§C 5.1 7.5 mA Negative Supply Current TA 25§C 4.1 5.0 mA Note 1: This rating applies for g15V supplies. The positive input voltage limit is 30V above the negative supply. The negative input voltage limit is equal to the negative supply voltage or 30V below the positive supply, whichever is less. Note 2: The maximum junction temperature of the LF111 is a150§C, the LF211 is a110§C and the LF311 is a85§C. For operating at elevated temperatures, devices in the H08 package must be derated based on a thermal resistance of a165§C/W, junction to ambient, or a20§C/W, junction to case. Note 3: These specifications apply for V S g15V and 55 §CsTAsa125§C for the LF111, unless otherwise stated. With the LF211, however, all temperature specifications are limited to 25§CsTAsa85§C and for the LF311 0 §CsTAsa70§C. The offset voltage, offset current and bias current specifications apply for any supply voltage from a single 5.0 mV supply up to g15V supplies. Note 4: The offset voltages and offset currents given are the maximum values required to drive the output within a volt of either supply with a 1.0 mA load. Thus, these parameters define an error band and take into account the worst case effects of voltage gain and input impedance. Note 5: The response time specified (see definitions) is for a 100 mV input step with 5.0 mV overdrive. Note 6: For input voltages greater than 15V above the negative supply the bias and offset currents will increaseÐsee typical performance curves. Note 7: This specification gives the current that must be drawn from the strobe pin to ensure the output is properly disabled. Do not short the strobe pin to ground; it should be current driven at 3 to 5 mA.Auxiliary Circuits Offset Balancing TL/H/5703 13 Strobing TL/H/5703 14 Note: Do Not Ground Strobe Pin. Increasing Input Stage Current* TL/H/5703 15 *Increases typical common mode slew from 7.0V/ mst o 18V/ms

Typical Performance Characteristics Input Bias Current vs Common Mode Input Bias Current vs Temperature Transfer Function Response Time for Various Input Overdrives Response Time for Various Input Overdrives Output Saturation Voltage Response Time for Various Input Overdrives Response Time for Various Input Overdrives Supply Current Output Limiting Characteristics Supply Current Leakage Currents TL/H/5703 4

100 kHz Free Running Multivibrator TL/H/5703 7 *TTL or DTL fanout of two. Crystal Oscillator TL/H/5703 3

10 Hz to 10 kHz Voltage Controlled Oscillator

*Adjust for symmetrical squarewave time when V IN 5.0 mV. ²Minimum capacitance 20 pF. Maximum frequency 50 kHz. TL/H/5703 5

Typical Applications (Continued) Frequency Doubler Frequency range: InputÐ5.0 kHz to 50 kHz OutputÐ10 kHz to 100 kHz TL/H/5703 8 Zero Crossing Detector Driving MOS Switch TL/H/5703 9 Zero Crossing Detector Driving MOS Logic TL/H/5703 10 Driving Ground-Referred Load TL/H/5703 11 *Input polarity is reversed when using pin 1 as output. Comparator and Solenoid Driver TL/H/5703 12

Typical Applications (Continued) Switching Power Amplifier TL/H/5703 16 Switching Power Amplifier TL/H/5703 17

Typical Applications (Continued) Relay Driver with Strobe TL/H/5703 18 Note: Do Not Ground Strobe Pin. *Absorbs inductive kickback of relay and protects IC from severe voltage transients on V aa line. Positive Peak Detector *Solid tantalum TL/H/5703 19 Negative Peak Detector *Solid tantalum TL/H/5703 20

Typical Applications (Continued) TTL Interface with High Level Logic *Values shown are fora0t o3 0 Vlogic swing and a 15V threshold. TL/H/5703 21 ²May be added to control speed and reduce susceptibility to noise spikes Using Clamp Diodes to Improve Response TL/H/5703 6

LF111/LF211/LF311 Voltage Comparators Physical Dimensions inches (millimeters) Metal Can Package (H) Order Number LF111H, LF111H-MIL or LF311H LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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