Datasheet

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LT1017/LT1018

10178ff

TYPICAL APPLICATION

DESCRIPTION

Micropower

Dual Comparator

The LT

1017/LT1018 are general purpose micropower

comparators. The LT1017 is optimized for lowest operat-

ing power while the LT1018 operates at higher power and

higher speed. Both devices can operate from a single 1.1V

cell up to 40V. The output stage includes a class “B” pull-

up current source, eliminating the need for an external

resistive pull-up and saving power. The output stage is

also designed to allow driving loads connected to a supply

more positive than the device, as can comparators with

open-collector output stages.

Input speciﬁ cations are also excellent. On-chip trimming

minimizes offset voltage, while high gain and common

mode rejection ratio keep other input referred errors low.

Common mode voltage range includes ground. Special

circuitry prevents false output states even if the input is

overdriven.

The LT1017/LT1018 are pin compatible with older dual

comparators such as 393 type devices.

1.5V Powered Refrigerator Alarm

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

FEATURES

APPLICATIONS

Maximum Offset Voltage: 1mV

Maximum Bias Current: 15nA

Typical Output Drive: 70mA

Operates from 1.1V to 40V

Internal Pull-Up Current

Output Can Drive Loads Above V

30μA Supply Current (LT1017)

110μA Supply Current (LT1018)

Available in 8-Lead PDIP, 8-Lead Plastic S0, and

16-Lead Plastic SO Packages

Power Supply Monitors

Relay Driving

Oscillators

Supply Current

665k

52.3k

OUTPUT HIGH FOR

0°C ≤ T ≤ 5°C

280k

YSI 44011

258.3k AT 5°C

333.1k AT 0°C

665k

1.5V

–

1/2 LT1017

1017/18 TA01

–

1/2 LT1017

TOTAL SUPPLY VOLTAGE (V)

124

SUPPLY CURRENT (μA)

160

10 20 40 100

1017/18 TA02

120

140

100

LT1018

OUTPUTS

LOW

LT1017

OUTPUTS

LOW

LT1018

OUTPUTS

HIGH

LT1017

OUTPUTS

HIGH

Summary of content (16 pages)

PAGE 1
LT1017/LT1018 Micropower Dual Comparator FEATURES DESCRIPTION n The LT®1017/LT1018 are general purpose micropower comparators. The LT1017 is optimized for lowest operating power while the LT1018 operates at higher power and higher speed. Both devices can operate from a single 1.1V cell up to 40V. The output stage includes a class “B” pullup current source, eliminating the need for an external resistive pull-up and saving power.
PAGE 2
LT1017/LT1018 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage ......................................................... 40V Differential Input Voltage.......................................... 40V Input Voltage............................................. – 0.3V to 40V Short-Circuit Duration .................................... Indeﬁnite Storage Temperature Range.................. –65°C to 150°C Operating Temperature Range LT1017M/LT1018M ......................... –55°C to 125°C LT1017C/LT1018C ........
PAGE 3
LT1017/LT1018 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating temperature range of – 55°C to 85°C for M grade parts, –40°C to 85°C for I grade parts and 0°C to 70°C for C grade parts. PARAMETER CONDITIONS MIN Offset Voltage (Note 2) ± 0.75V ≤ VS ≤ ±20V 25°C ● LT1017 TYP ±0.75V ≤ VS ≤ ±20V 25°C ● 125°C Offset Current ±0.75V ≤ VS ≤ ±20V 25°C ● VS = ±20V, –20V ≤ VCM ≤ 19.1V 25°C ● 125°C Power Supply Rejection Ratio ±0.
PAGE 4
LT1017/LT1018 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating temperature range of – 55°C to 85°C for M grade parts, –40°C to 85°C for I grade parts and 0°C to 70°C for C grade parts.
PAGE 5
LT1017/LT1018 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current Input Offset Current LT1018 VCM = V– LT1018 VCM = V+ – 1V 10 LT1017 VCM = V– IBIAS REVERSES POLARITY LT1017 VCM = V+ – 1V 1 –50 –25 0 2.0 1.5 1.0 50 25 75 0 TEMPERATURE (°C) 100 0 –20 125 V+ –0.4 Common Mode Limits 0.1 VCM HIGH –1.0 V– VCM LOW –0.2 –0.4 –0.6 V– –0.2 –0.4 –0.6 –0.
PAGE 6
LT1017/LT1018 TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT SHORTED TO V+ 80 LT1018 VS = 5V 60 LT1017 VS = 5V TOTAL SWITCHING TIME (μs) OUTPUT CURRENT LIMIT (mA) Total Switching Time 100 LT1018 VS = 40V 40 LT1017 VS = 40V 20 0 –50 –25 0 RL = 47k (LT1018) RL = 200k (LT1017) VOUT = 90% VFINAL VOVERDRIVE = 5mV LT1018 FALL 10 LT1017 RISE LT1017 FALL LT1017 RISE LT1018 RISE 1 –50 –25 25 50 75 100 125 150 TEMPERATURE (°C) Output Delay 100 DELAY TIME (μs) Output Sinking Current Limit 100 0 T
PAGE 7
LT1017/LT1018 TYPICAL APPLICATIONS Driving Relays Increasing Positive Output Current Delay On Power Up V+ 12V V+ + 100k 5V VIN 2 – 8 LT1017 3 + 3 VIN 2 4 8 + 1 – VOUT 2 1N4148 4 V– 1017/18 TA03 3 2N3904 1 LT1017/ LT1018 1μF + 8 LT1017/ LT1018 – 1 4 1017/18 TA04 1k 20k 1017/18 TA05 LT1018 Op Amp, AV = 100 5V 10k 3 VIN 8 + R1* 1 LT1018 2 – VOUT 4 RL –5V 1M 10k 15Ω 0.22μF 1017/18 TA06 RL = 100k BANDWIDTH = 30Hz –SLEW = 320V/ms +SLEW = 0.
PAGE 8
LT1017/LT1018 TYPICAL APPLICATIONS Negative Voltage Regulator 510k 2 + 510k VOUT –5V 50mA 1 LT1017/ LT1018 3 100k 8 150pF – + LT1004 2.5V 4 220μF 1k 220pF 1017/18 TA08 –VIN –5.2V TO –40V 2-Wire Comparator 4.7k VSUPPLY VIN 3 + 8 LT1018 2 – 1N4148 ×2 1 OUTPUT 3V ≤ VSUPPLY ≤ 40V 4 LT1018 ONLY 0.01μF 4.
PAGE 9
LT1017/LT1018 TYPICAL APPLICATIONS 5V Power Supply Monitor V+ 36.5k 1% 3k 5 2.5k 1% 8 + 7 1/2 LT1017 6 – 3 + 1 1/2 LT1017 LT1034 1.235V OUTPUT HIGH FOR 4.5V ≤ VIN ≤ 5.5V 2 – 4 OUTPUT VALID FOR V+ ≥ 1.1V 11.2k 1% 1017/18 TA10 Precise Tri-Wave Generator TRIANGLE WAVE OUTPUT 0.5V TO 2.5V 5V 22k 0.047μF 3k 2N3904 2 – 1/2 LT1013 3 3k 8 1 22k + 3 4 + 8 1/2 LT1018 2 – 1 SQUARE WAVE OUTPUT 10pF 100k LT1009 2.
PAGE 10
LT1017/LT1018 TYPICAL APPLICATIONS Power Supply Monitor VIN 160k 330Ω 1N4148 100k 2 + 1 LT1018 1μF 3 LT1004 1.2V 8 – + 390k 4 0.01μF 1017/18 TA12 120k 1N4148 VIN LED 6.00V OFF 5.25V FLASH AT 1Hz 5.00V FLASH AT 3Hz 4.75V FLASH AT 5Hz 1.5V Input Flyback Regulator 22μF + 1.5V 2M 2 1M 100k – 1/2 LT1018 3 6 + 1M 110k 220pF 1 0.0022μF 1/2 LT1018 1N4148 100k 1% FILM 5 120k 1% FILM + 7 HP5082-2810 4 56.2k 1% FILM 120k LT1004 1.2V L1 4.
PAGE 11
LT1017/LT1018 TYPICAL APPLICATIONS Regulated Step-Up Converter 5V 400mH** 1N4148 100k 2 0.1μF 200k 5 1 1/2 LT1018 + 1N4148 + 4 LT1004 1.2V + OUTPUT 10V 2mA 100μF R1* 910k 2000pF 7 1/2 LT1018 6 3 8 – – ( ) R2* 120k *VOUT = 1.2 1 + R1 R2 **DALE TE-5/Q3/400mH 1017/18 TA14 Low Power* V-to-F Converter 3M 0.001μF POLYSTYRENE 1N4148 OUTPUT 0kHz TO 1kHz 9V 2 2N3904 0.1μF 1/2 LT1018 3 100k 1N4148 8 – + 1N4148 1 1N4148 4 220pF 1M LT1034 1.2V 10k 330k 7 *IQ ≅ 350μA 220k 2.
PAGE 12
LT1017/LT1018 PACKAGE DESCRIPTION H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 (1.016) MAX .050 (1.270) MAX SEATING PLANE .165 – .185 (4.191 – 4.699) GAUGE PLANE .010 – .045* (0.254 – 1.143) REFERENCE PLANE .500 – .750 (12.700 – 19.050) .016 – .021** (0.406 – 0.533) .027 – .045 (0.686 – 1.143) 45° PIN 1 .028 – .034 (0.711 – 0.864) .200 (5.080) TYP .110 – .160 (2.794 – 4.
PAGE 13
LT1017/LT1018 PACKAGE DESCRIPTION N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .400* (10.160) MAX 8 7 6 5 1 2 3 4 .255 ± .015* (6.477 ± 0.381) .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( 8.255 +0.889 –0.381 ) .045 – .065 (1.143 – 1.651) .130 ± .005 (3.302 ± 0.127) .065 (1.651) TYP .100 (2.54) BSC .120 (3.048) .020 MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076) N8 1002 NOTE: 1.
PAGE 14
LT1017/LT1018 PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .050 BSC .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 8 .245 MIN 7 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .053 – .069 (1.346 – 1.752) .014 – .019 (0.355 – 0.
PAGE 15
LT1017/LT1018 PACKAGE DESCRIPTION SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) .050 BSC .045 ±.005 .030 ±.005 TYP .398 – .413 (10.109 – 10.490) NOTE 4 16 N 15 14 13 12 11 10 9 N .325 ±.005 .420 MIN .394 – .419 (10.007 – 10.643) NOTE 3 1 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .005 (0.127) RAD MIN .009 – .013 (0.229 – 0.330) .291 – .299 (7.391 – 7.595) NOTE 4 .010 – .029 × 45° (0.254 – 0.737) 3 4 5 6 7 .093 – .104 (2.362 – 2.
PAGE 16
LT1017/LT1018 TYPICAL APPLICATION Fully Isolated Limit Comparator 5V INTERROGATE PULSE 500μs 1k INTERROGATE PULSE 2N3906 1μF – 4.7k 8 3 + 3k 1 1/2 LT1018 OUTPUT PULSE VIN > VTRIP NO OUTPUT PULSE FOR VIN < VTRIP 2N3906 20k 4 OUTPUT 100k 300k TRIP ADJUST + INPUT 2 LT1004 1.2V 100Ω 10k 2N3904 + 100μF 200pF TRW PC-550-32 ALL GATES 74C02 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1011/LT1011A Voltage Comparators Improved LT111A, 0.