LINEAR TECHNOLOGY LT1017, LT1018 User Manual
FEATURES
LT1017/LT1018
Micropower
Dual Comparator
U
DESCRIPTIO
■
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)
U
APPLICATIO S
■
Power Supply Monitors
■
Relay Driving
■
Oscillators
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” 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 specifications 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
1.5V Powered Refrigerator Alarm
+
V
1.5V
665k
1%
3
+
1/2 LT1017
2
–
5
+
1/2 LT1017
6
–
YSI 44011
258.3k AT 5°C
333.1k AT 0°C
665k
1%
52.3k
1%
280k
1%
U
8
4
1017/18 TA01
1
7
OUTPUT HIGH FOR
0°C ≤ T ≤ 5°C
160
140
120
100
80
60
SUPPLY CURRENT (µA)
40
20
0
124
Supply Current
LT1018
OUTPUTS
LOW
LT1018
OUTPUTS
LT1017
OUTPUTS
LOW
TOTAL SUPPLY VOLTAGE (V)
HIGH
LT1017
OUTPUTS
HIGH
10 20 40 100
1017/18 TA02
10178fc
1
LT1017/LT1018
TOP VIEW
OUTPUT B
V
+
OUTPUT A
–IN A
–IN B
+IN B
+IN A
V
–
8
7
6
5
3
2
1
4
H PACKAGE
8-LEAD TO-5 METAL CAN
+
B
–
+
A
–
1
2
3
4
8
7
6
5
TOP VIEW
OUTPUT A
–IN A
+IN A
V
–
V
+
OUTPUT B
–IN B
+IN B
N8 PACKAGE
8-LEAD PDIP
+
B
–
+
–
A
TOP VIEW
SW PACKAGE
16-LEAD PLASTIC SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
NC
OUT A
–IN A
+IN A
V
–
NC
NC
NC
NC
V
+
OUT B
–IN B
+IN B
NC
NC
A
W
O
LUTEXI TIS
S
A
WUW
U
(Note 1)
ARB
G
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
PACKAGE
/
O
RDER I FOR ATIO
WU
U
ORDER PART
NUMBER
LT1017MH
LT1017CH
LT1018MH
LT1018CH
T
= 150°C, θJA = 150°C/W, θJC = 45°C/W
JMAX
OBSOLETE PACKAGE
Consider the 8-Lead Plastic Dip Package for Alternate Source
ORDER PART
NUMBER
LT1017CS8
LT1017IS8
LT1018CS8
S8 PART
MARKING
1017
+IN A
1
–
V
2
+IN B
3
–IN B
4
S8 PACKAGE
8-LEAD PLASTIC SO
T
= 150°C, θJA = 190°C/W
JMAX
TOP VIEW
8
–IN A
OUT A
7
+
V
6
OUT B
5
1017I
1018
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Operating Temperature Range
LT1017M/LT1018M ...................... –55°C to 125°C
LT1017C/LT1018C ............................... 0°C to 70°C
LT1017I........................................... –40°C to 85°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
LT1017CN8
LT1017IN8
LT1018CN8
T
= 150°C, θJA = 130°C/W
JMAX
ORDER PART
NUMBER
LT1017CSW
LT1018CSW
T
= 150°C, θJA = 130°C/W
JMAX
LECTRICAL C CHARA TERIST
E
The ● denotes specifications which apply over the operating temperature
ICS
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 TYP MAX MIN TYP MAX UNITS
Offset Voltage ±0.75V ≤ VS ≤ ±20V 25°C 0.4 1 0.4 1 mV
(Note 2)
● 0.5 1.4 0.5 1.4 mV
125°C 5 0.7 1.5 mV
Bias Current ±0.75V ≤ VS ≤ ±20V 25°C 5 15 15 75 nA
● 7 25 18 100 nA
125°C 10 60 110 nA
Offset Current ±0.75V ≤ VS ≤ ±20V 25°C 0.4 2 1 8 nA
Common Mode Rejection Ratio VS = ±20V, – 20V ≤ VCM ≤ 19.1V 25°C 105 115 105 115 dB
2
● 0.5 3 1.6 12 nA
125°C20 20nA
● 100 115 100 115 dB
125°C 82 100 95 110 dB
LT1017 LT1018
10178fc
LT1017/LT1018
LECTRICAL C CHARA TERIST
E
The ● denotes specifications which apply over the operating temperature
ICS
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 TYP MAX MIN TYP MAX UNITS
Power Supply Rejection Ratio ±0.75V ≤ VS ≤ ±20V 25°C 96 110 96 110 dB
● 95 105 95 105 dB
125°C 82 86 100 dB
Gain No Load, V
RL = 4k, V
Output Sink Current V+ = 4.5V, V– = 0V 25°C3065 3570 mA
Overdrive > 30mV ● 25 50 25 50 mA
Output Source Current V+ = 40V, V– = 0V 25°C 30 75 75 250 µA
VIN = 5mV, V
V+ = 1.2V, V– = 0V 25°C 25 35 70 140 µA
VIN = 5mV, V
Negative Output Saturation I
Positive Output Saturation I
Leakage Current VS = 5V, V
Supply Current VS = 5V 25°C 30 60 110 250 µA
Minimum Operating Voltage I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Offset voltage is guaranteed over a common mode voltage range
of V– ≤ VIN ≤ (V+ – 0.9V).
= 0mA V+ = 4.5V, V– = 0V 25°C520 515mV
OUT
= 0.1mA VIN = –10mV 25°C 3560 3560 mV
= 1mA 25°C 60 120 60 120 mV
= 10mA 25°C 120 200 120 250 mV
= 30mA 25°C 350 600 350 700 mV
I
= 0mA V+ = 4.5V, V– = 0V ● 520 820 mV
OUT
= 0.1mA V
= 1mA ● 75 150 70 150 mV
= 10mA
= 30mA
I
= 0mA V+ = 4.5V, V– = 0V 125°C 2550 1040 mV
OUT
= 0.1mA V
= 1mA 125°C 100 200 110 200 mV
= 10mA 125°C 300 600 300 400 mV
= 30mA 125°C 900 mV
= 0µA25°C 4080 3580 mV
OUT
= 10µA25°C 175 250 175 250 mV
= 0µA
= 10µA ● 190 300 190 300 mV
= 0µA 125°C 50 100 50 100 mV
= 10µA 125°C 300 300 mV
≥ 100mV ● 0.6 3 1.8 10 µA
V
IN
VS = 40V 25°C 40 90 130 250 µA
= 1mA 25°C 1.15 1.2 V
OUT
= ±19.9V (Note 3) 25°C 110 115 110 125 dB
OUT
= ±19V 25°C 100 110 100 110 dB
OUT
= 0.4V ● 25 70 50 220 µA
OUT
= 0.4V ● 15 20 45 120 µA
OUT
= –10mV ● 40 75 35 70 mV
IN
= –10mV 125°C 60 100 60 100 mV
IN
= 40V 25°C 0.5 3 1 8 µA
OUT
● 105 115 105 120 dB
125°C 100 100 dB
● 94 94 dB
125°C1020 1030 mA
125°C 25 75 50 200 µA
125°C 25 40 40 110 µA
● 150 300 150 300 mV
● 600 900 500 900 mV
● 45 90 45 90 mV
125°C5 15µA
● 40 80 110 250 µA
125°C 80 300 µA
● 55 100 140 270 µA
125°C 100 300 µA
● 1.15 1.2 V
125°C 1.15 1.2 V
Note 3: No load gain is guaranteed but not tested (LT1017 only).
LT1017 LT1018
10178fc
3
LT1017/LT1018
LPER
F
O
R
ATYPICA
UW
CCHARA TERIST
E
C
ICS
Input Bias Current
100
LT1018 VCM = V
LT1018 VCM = V+ – 1V
10
LT1017 VCM = V
INPUT BIAS CURRENT (nA)
LT1017 VCM = V+ – 1V
1
–50 –25
0
TEMPERATURE (°C)
–
–
REVERSES
POLARITY
50
25 75
I
BIAS
100
Input Bias Current with Inputs
Driven Below the Supply
100
10
125°C
–
0.2 –0.6 –1.0
COMMON MODE VOLTAGE (V)
INPUT BIAS CURRENT (µA)
1
0.1
0.01
85°C25°C
–0.2V
–0.8–0.4
125
1017/18 G01
1017/18 G04
150
Input Offset Current Bias Current vs Differential Input
3.0
2.5
2.0
1.5
1.0
INPUT OFFSET CURRENT (nA)
0.5
0
–50
–25 0
Common Mode Limits Supply Current
+
V
–0.4
–0.6
–0.8
–1.0
–
V
–0.2
–0.4
COMMON MODE VOLTAGE (V)
–0.6
∆VOS = 0.5mV
VOLTAGES ARE REFERRED TO SUPPLIES
–0.8
–50 –25 25 50 75
LT1018
LT1017
50 100 125
25 75
TEMPERATURE (°C)
VCM LOW
0
TEMPERATURE (°C)
VCM HIGH
100 125
1017/18 G02
150
1017/18 G05
20
LT1018 + I
B
15
10
LT1017 + I
BIAS CURRENT (nA)
5
0
–20
160
V
140
120
100
80
60
SUPPLY CURRENT (µA)
40
20
0
–50 –25 25 50 75
B
–0.2 –0.1 0.1
DIFFERENTIAL INPUT VOLTAGE (V)
= 20V
SUPPLY
0
TEMPERATURE (°C)
0
LT1018
OUTPUTS LOW
LT1018
OUTPUTS HIGH
LT1017
OUTPUTS LOW
LT1017
OUTPUTS HIGH
LT1018 – I
LT1017 – I
0.2
1017/18 G03
100 125
1017/18 G06
B
B
20
150
Positive Supply Current
10000
1000
100
POSITIVE SUPPLY CURRENT (µA)
10
0.1
OUTPUT SINK CURRENT (mA)
4
LT1018 LT1017
1 10 100
1017/18 G07
NPN Output Saturation Voltage Output Sinking Current Limit
1000
100
125°C
SATURATION VOLTAGE (mV)
10
0.001
0.01 1001010.1
SINK CURRENT (mA)
–55°C25°C
1017/18 G08
100
OUTPUT SHORTED TO V
80
60
40
20
OUTPUT CURRENT LIMIT (mA)
0
1
TOTAL SUPPLY VOLTAGE (V)
LT1017
10 100
+
LT1018
1017/18 G09
10178fc
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