LM6511 180 ns 3V Comparator General Description Features The LM6511 voltage comparator is ideal for analog-digital interface circuitry when only a +3V or +3.3V supply is available. The open-collector output permits signal compatibility with a wide variety of digital families: +5V CMOS, +3V CMOS, TTL and so on. Supply voltage may range from 2.7V to 36V between supply voltage leads. The LM6511 operates with little power consumption (Pdiss < 9.45 mW at V+ = +2.7V and V− = 0V). (Typical unless otherwise noted) n Operates at +2.7V, +3V, +3.3V, +5V n Low Power consumption < 9.45 mW @ V+ = 2.7V (max) n Fast Response Time of 180 ns This voltage comparator offers many features that are available in traditional sub-microsecond comparators: output sync strobe, inputs and output may be isolated from system ground, and wire-ORing. Also, the LM6511 uses the industry-standard, single comparator pinout configuration. Applications n Portable Equipment n Cellular Phones n Digital Level Shifting Connection Diagram 8-Pin SO 01188801 Ordering Information Package Industrial Temperature Range NSC Package −40˚C to +85˚C Drawing 8-Pin Small Outline LM6511IM, LM6511IMX M08A © 2003 National Semiconductor Corporation DS011888 www.national.com LM6511 180 ns 3V Comparator March 2003 LM6511 Absolute Maximum Ratings Power Dissipation (Note 1) Output Short Circuit Duration If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage 50V Ground to Negative Supply Voltage 30V Input Voltage (C = +100 pF, R = 1.5 kΩ) 300V Operating Ratings (Note 1) Supply Voltage (Note 2) Storage Temperature Range 150˚C ESD Rating ± 30V Differential Input Voltage 10s Junction Temperature −0.3 to +36V Output to Negative Supply Voltage 500 mW 2.5V to 30V −40˚C ≤ TJ ≤ +85˚C Temperature Range −65˚C to +150˚C Soldering Information: Thermal Resistance (θJA) SO Package (Vapor Phase in 60 sec) SO Package (Infrared in 15 sec) SO Package 215˚C 220˚C 170˚C/W DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C. Boldface limits apply at the temperature extremes. V+ = 2.7V, V− = 0V, 50Ω ≤ RL ≤ 50kΩ, and IL = 1.0 mA unless otherwise specified Symbol Parameter VOS Offset Voltage IB Input Bias Current Conditions Typical RS ≤ 50 kΩ LM6511I Limit Units (Limits) 1.5 5 mV 8 max 38 130 (Note 3) 200 RS ≤ 50 kΩ Input Offset Current IOS 1.5 20 2.7 3.5 (Note 3) IS nA max 50 Positive Supply Current 5 Negative Supply Current 1.5 2.0 0.23 0.4 mA max 2.5 VSAT Saturation Voltage VIN ≤ 10 mV AV Large Signal Voltage Gain ∆VOUT = 2V 40 CMRR Common Mode Rejection Ratio ISTROBE Strobe ON Current (Note 5) 2.0 VIN Input Voltage Range ISINK = 8 mA 0.4 VIN ≥ 10 mV, VOUT = 35V, max V/mV 72 Output Leakage Current V dB 5.0 mA max 0.50 V min V+ − 1.25 V max 0.2 nA ISTROBE = 3 mA max AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C. Boldface limits apply at the temperature extremes. V+ = 2.7V, V− = 0V, 50Ω ≤ RL ≤ 50kΩ, and IL = 1.0 mA unless otherwise specified Symbol Parameter Conditions Typical LM6511I Limit TR Response Time (Note 4) 180 Units (Limits) ns Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Note 2: The positive input voltage limit is 30V above the negative supply voltage. The negative input voltage limit is equal to the negative supply voltage or 30V below the positive supply voltage, whichever is less. Note 3: The offset voltage and offset current limits are the maximum values required to drive the output within a volt of either supply with a 1 mA load. Therefore, these parameters define an error band and take into account the worst-case effects of voltage gain and input impedance. Note 4: This specification is for a 100 mV input step with a 25 mV overdrive. www.national.com 2 (Continued) Note 5: This specification gives the range of current which 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 mA to 5 mA. LM6511 Typical Performance Characteristics Input Bias Current VS = 3V unless otherwise noted Input Offset Current 01188809 01188808 Input Current vs. Input Voltage Common Mode Limits 01188810 01188811 Transfer Function Output Saturation Voltage 01188812 01188813 3 www.national.com LM6511 AC Electrical Characteristics LM6511 LM6511 Typical Performance Characteristics VS = 3V unless otherwise noted Output Current Limiting (Continued) Supply Current vs. Temperature 01188815 01188814 Output Leakage Current Propagation Delay vs. Overdrive 01188816 01188803 Typical Application Universal Logic Level Shifter 01188804 Notes: Because of the very wide operating and output voltage range, the LM6511 may be used to shift logic levels from 3V to TTL or CMOS to the other way around. By biasing the input to 1⁄2 of the input logic supply (VA), this assures that this input remains within the input voltage range. The pull-up resistor should go to the output logic supply (VB). www.national.com 4 LM6511 Schematic Diagram 01188805 5 www.national.com LM6511 180 ns 3V Comparator Physical Dimensions inches (millimeters) unless otherwise noted 8-Pin Small Outline Package (M) Order Number LM6511IM, LM6511IMX Package Number M08A 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 AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 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