LP365M - National Semiconductor

TL/H/5023

LP265/LP365 Micropower Programmable Quad Comparator

December 1994

LP265/LP365 Micropower Programmable

Quad Comparator

General Description

The LP365 consists of four independent voltage compara-

tors. The comparators can be programmed, four at the

same time, for various supply currents, input currents, re-

sponse times and output current drives. This is accom-

plished by connecting a single resistor between the VCC

and ISET pins.

These comparators can be operated from split power sup-

plies or from a single power supply over a wide range of

voltages. The input can sense signals at ground level even

with single supply operation. The unique output NPN tran-

sistor stages are uncommitted to either power supply. They

can be connected directly to various logic system supplies

so that they are highly flexible to interface with various logic

families.

Application areas include battery power circuits, threshold

detectors, zero crossing detectors, simple serial A/D con-

verters, VCO, multivibrators, voltage converters, power se-

quencers, and high performance V/F converters, and RTD

linearization.

Features

YSingle programming resistor to tailor power consump-

tion, input current, speed and output current drive

capability

YWide single supply voltage range or dual supplies (4

VDC to 36 VDC or g2.0 VDC to g18 VDC)

YLow supply current drain (10 mA) and low power

consumption (10 mW/comparator) @ISET e0.5 mA

VCC e5VDC

YUncommitted output stageÐselectable output levels

YOutput directly compatible with DTL, TTL, CMOS, MOS

or other special logic families

YInput common-mode range includes ground

YDifferential input voltage equal to the power supply

voltage

Typical Connection

TL/H/5023–1

Programming Equation

ISETe(Va)b(Vb)b1.3V

RSET

ISUPPLY&22cISET

Connection Diagram

Dual-In-Line Package

TL/H/5023–2

Order Number LP365M, LP365AN or LP365N

See NS Package Numbers M16A or N16A

C1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

Absolute Maximum Ratings

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales

Office/Distributors for availability and specifications.

Supply Voltage 36 VDC or g18 VDC

Differential Input Voltage g36 VDC

Input Voltage (Note 1) b0.3V to a36 VDC

Output Short Circuit to VE(Note 2) Continuous

VOUT with Respect to VEVEb7VsVOUTsVEa36V

ESD Tolerance (Note 10) 2000V

M Package N Package

Power Dissipation (Note 3) 500 mW 500 mW

TjMax 115§C 115§C

ijA 115§C/W 90§C/W

Lead Temp.

(SolderingÐ10 sec.) 260§C

(Vapor PhaseÐ60 sec.) 215§C

(InfraredÐ15 sec.) 220§C

Operating Temp. Range LP365: 0§CsTAsa70§C

Storage Temp. Range b40§CsTAsa150§C

Electrical Characteristics (Note 4) Low power VSe5V, ISETe10 mA

LP365A LP365

Symbol Parameter Conditions Tested Design Tested Design Units

Typ Limit Limit Typ Limit Limit (Limit)

(Note 5) (Note 6) (Note 5) (Note 6)

VOS Input Offset VCMeOV, 13 636 9mV

Voltage RSe100 (Max)

IOS Input Offset VCMe0V 2 20 50 425 75 nA

Current LP265 425 150 (Max)

IBInput Bias VCMe0V 10 50 125 15 75 200 nA

Current LP265 15 75 300 (Max)

AVOL Large Signal RLe100k 500 50 50 300 25 25 V/mV

Voltage Gain (Min)

VCM Input Common- 0000V

Mode Voltage (Max)

Range

3333V

(Min)

CMRR Common-Mode 0sVCMs3V 85 75 70 80 75 70 dB

Rejection Ratio (Min)

PSRR Supply Voltage g2.5VsVS75 65 65 70 65 65 dB

Rejection Ratio sg3.5V (Min)

ISSupply Current All Inputse0V, 215 250 300 225 275 300 mA

RLe%(Max)

VOH Output Voltage VCe5V, V

High VEe0V, 4.9 4.5 4.9 4.5 (Min)

RLe100k

VOL Output Voltage VEe0V 0.4 0.4 0.4 0.4 V

Low (Max)

ISINK Output Sink VEe0V, 2.4 1.2 0.6 2.0 0.8 0.4 mA

Current VOe0.4V (Min)

ILEAK Output Leakage VCe5V, 2505000 2 100 5000 nA

Current VEe0V (Max)

tRResponse Time VCCe5V,

VEe0V,

RLe5k, 4 4 ms

CLe10 pF

(Note 7)

Electrical Characteristics (Continued) (Note 8) High power VSeg15V, ISETe100 mA

LP365A LP365

Symbol Parameter Conditions Tested Design Tested Design Units

Typ Limit Limit Typ Limit Limit (Limit)

(Note 5) (Note 6) (Note 5) (Note 6)

VOS Input Offset VCMe0V, 13 636 9mV

Voltage RSe100 (Max)

IOS Input Offset VCMe0V 5 50 100 10 90 200 nA

Current LP265 10 90 500 (Max)

IBInput Bias VCMe0V 60 200 500 80 300 500 nA

Current LP265 80 300 800 (Max)

AVOL Large Signal RLe15k 500 100 100 500 100 100 V/mV

Voltage Gain (Min)

VCM Input Common- b15 b15 b15 b15 V

Mode Voltage (Max)

Range

13 13 13 13 V

(Min)

CMRR Common-Mode b15VsVCM 85 75 70 80 75 70 dB

Rejection Ratio s13V (Min)

PSRR Supply Voltage g10VsVS80 70 70 75 70 70 dB

Rejection Ratio sg15V (Min)

ISSupply Current All Inputse0V, 2.6 3 3.3 2.8 3.5 3.7 mA

RLe%, LP265 2.8 3.5 4.3 (Max)

VOH Output Voltage VCe5V, V

High VEe0V, 4.9 4.5 4.9 4.5 (Min)

RLe100k

VOL Output Voltage VEe0V 0.4 0.4 0.4 0.4 V

Low (Max)

ISINK Output Sink VEe0V, 10 8 5.5 7.5 6 4mA

Current VOe0.4V (Min)

ILEAK Output Leakage VCe15V, 5505000 5505000 nA

Current VEeb15V (Max)

tRResponse Time VCCe5V,

VEe0V,

RLe5k, 1.0 1.0 ms

CLe10 pF

(Note 7)

Note 1: The input voltage is not allowed to go 0.3V above Vaor b0.3V below Vbas this will turn on a parasitic transistor causing large currents to flow through

the device.

Note 2: Short circuits from the output to Vamay cause excessive heating and eventual destruction. The current in the output leads and the VElead should not be

allowed to exceed 30 mA. The output should not be shorted to Vbif VEs(Vb)a7V.

Note 3: For operating at elevated temperatures, these devices must be derated based on a thermal resistance of ijA and Tjmax. TjeTAaijAPD.

Note 4: Boldface numbers apply at temperature extremes. All other numbers apply at TAeTje25§C. Vae5V, Vbe0V, ISETe10 mA, RLe100k, and

VCe5V as shown in the Typical Connection diagram.

Note 5: Guaranteed and 100% production tested.

Note 6: Guaranteed (but not 100% production tested) over the operating temperature and supply voltage ranges. These limits are not used to calculate out-going

quality levels.

Note 7: The response time specified is for a 100 mV input step with 5 mV overdrive.

Note 8: Boldface numbers apply at temperature extremes. All other numbers apply at TAeTje25§C. Vaea15V, Vbeb15V, ISETe100 mA, RLe100k, and

VCe5V as shown in the Typical Connection diagram.

Note 9: See AN-450 ‘‘Surface Mounting Methods and Their Effect on Product Reliability’’ for other methods of soldering surface mount devices.

Note 10: Human body model, 1.5 kXin series with 100 pF.

Typical Performance Characteristics

Supply Current vs ISET

Supply Current vs Supply

Voltage

Supply Current vs

Temperature

Input Bias Current vs ISET Output Saturation Voltage Voltage Gain vs ISET

Response Time

Negative Transition

Response Time

Positive Transition

Response Time

Negative Transition

Response Time

Positive Transition

TL/H/5023–3

Typical Applications

Gated 4-Phase Oscillator

TL/H/5023–4

fe20 kHz

fe1

1.6#Rt#Ct

All four phases run when X is low. When X is high, oscillation stops and

power drain is zero.

‘‘Voting’’ Comparator

TL/H/5023–5

If VEe0.25V, then VOUT will be low if 1 of the 3 other outputs are low.

Choice of VEe0.50V causes VOUT to be low if 2 of the 3 other outputs are

low; VEe0.75V will cause VOUT to be low if all 3 other outputs are low.

Typical Applications (Continued)

Ordinary Hysteresis

TL/H/5023–6

It is a good practice to add a few millivolts of positive feedback to prevent

oscillation when the input voltage is near the threshold.

Hysteresis from Emitter

TL/H/5023–7

Positive feedback from the emitter can also prevent oscillations when VIN is

near the threshold.

Bar-Graph Display

TL/H/5023–8

The positive feedback from pin 16 provides hysteresis.

Level-Sensitive Strobe

TL/H/5023–9

Comparators B, C, and D do not respond until activated by the signal applied

to comparator A.

Typical Applications (Continued)

Slow Op Amp (Inverter)

TL/H/5023–10

RBeVa/20 mA

Unlike most comparators, the LP365 can be used as an op amp, if suitable

R-C damping networks are used.

Slow Op Amp (Unity-Gain Follower)

TL/H/5023–11

RBeVa/20 mA

The LP365 can also be used as a high-input-impedance follower-amplifier

with the damping components shown.

Chopping Outputs

TL/H/5023–12

Chopping the outputs by modulating the ISET current allows data to be trans-

mitted via opto-couplers, transformers, etc.

Low Battery Detector

TL/H/5023–13

IS@6V e45 mA

IS@3.8V e1mA

fe3 kHz

Comparator A detects when the supply voltage drops to 4V and enables

comparator B to drive a piezoelectric alarm.

Simplified Schematic

TL/H/5023–14

Current sources are programmed by ISET

VEis common to all 4 comparators

Physical Dimensions inches (millimeters)

Plastic Surface-Mount Package (M)

Order Number LP365M

NS Package Number M16A

LP265/LP365 Micropower Programmable Quad Comparator

Physical Dimensions inches (millimeters) (Continued)

Molded Dual-In-Line Package (N)

Order Number LP365AN or LP365N

NS Package Number N16A

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