LT1017/LT1018
Micropower
Dual Comparator
FEATURES
s
s
s
s
s
s
s
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)
APPLICATIO S
s
s
s
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 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.
Power Supply Monitors
Relay Driving
Oscillators
TYPICAL APPLICATIO
V
+
1.5V
665k
1%
1.5V Powered Refrigerator Alarm
160
140
+
–
8
1
OUTPUT HIGH FOR
0°C
≤
T
≤
5°C
665k
1%
52.3k
1%
SUPPLY CURRENT (µA)
3
120
100
80
60
40
20
0
1
2
4
10
20
40
TOTAL SUPPLY VOLTAGE (V)
100
1017/18 TA02
1/2 LT1017
2
5
+
1/2 LT1017
7
YSI 44011
258.3k AT 5°C
333.1k AT 0°C
6
280k
1%
–
4
1017/18 TA01
U
Supply Current
LT1018
OUTPUTS
LOW
LT1017
OUTPUTS
LOW
LT1018
OUTPUTS
HIGH
LT1017
OUTPUTS
HIGH
10178fc
U
U
1
LT1017/LT1018
ABSOLUTE
AXI U
RATI GS
(Note 1)
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
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/ORDER I FOR ATIO
TOP VIEW
V
+
8
OUTPUT A 1
–IN A 2
–
+IN A 3
A
+ +
B
7 OUTPUT B
–
6 –IN B
5 +IN B
ORDER PART
NUMBER
LT1017MH
LT1017CH
LT1018MH
LT1018CH
OUTPUT A 1
–IN A 2
+IN A 3
V
–
4
4
V
–
H PACKAGE
8-LEAD TO-5 METAL CAN
T
JMAX
= 150°C,
θ
JA
= 150°C/W,
θ
JC
= 45°C/W
Consider the 8-Lead Plastic Dip Package for Alternate Source
OBSOLETE PACKAGE
TOP VIEW
+IN A 1
V
–
2
+IN B 3
–IN B 4
8
7
6
5
–IN A
OUT A
V
+
OUT B
S8 PACKAGE
8-LEAD PLASTIC SO
ORDER PART
NUMBER
LT1017CS8
LT1017IS8
LT1018CS8
S8 PART
MARKING
1017
1017I
1018
T
JMAX
= 150°C,
θ
JA
= 190°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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
Offset Voltage
(Note 2)
Bias Current
CONDITIONS
±0.75V ≤
V
S
≤ ±20V
±0.75V ≤
V
S
≤ ±20V
±0.75V ≤
V
S
≤ ±20V
V
S
=
±20V,
– 20V
≤
V
CM
≤
19.1V
25°C
q
ELECTRICAL CHARACTERISTICS
The
q
denotes specifications which apply over the operating temperature
MIN
LT1017
TYP
0.4
0.5
5
7
10
0.4
0.5
105
100
82
115
115
100
MAX
1
1.4
5
15
25
60
2
3
20
105
100
95
MIN
LT1018
TYP
0.4
0.5
0.7
15
18
1
1.6
115
115
110
MAX
1
1.4
1.5
75
100
110
8
12
20
UNITS
mV
mV
mV
nA
nA
nA
nA
nA
nA
dB
dB
dB
10178fc
Offset Current
Common Mode Rejection Ratio
2
U
U
W
W W
U
W
TOP VIEW
8
–
+A
–
B+
N8 PACKAGE
8-LEAD PDIP
7
6
5
V
+
OUTPUT B
–IN B
+IN B
ORDER PART
NUMBER
LT1017CN8
LT1017IN8
LT1018CN8
T
JMAX
= 150°C,
θ
JA
= 130°C/W
TOP VIEW
NC 1
NC 2
OUT A 3
–IN A 4
+IN A 5
V
–
6
16 NC
15 NC
14 V
+
13 OUT B
12 –IN B
11 +IN B
10 NC
9
NC
ORDER PART
NUMBER
LT1017CSW
LT1018CSW
NC 7
NC 8
SW PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/W
125°C
25°C
q
125°C
25°C
q
125°C
25°C
q
125°C
LT1017/LT1018
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
Power Supply Rejection Ratio
CONDITIONS
±0.75V ≤
V
S
≤ ±20V
No Load, V
OUT
=
±19.9V
(Note 3)
R
L
= 4k, V
OUT
=
±19V
Output Sink Current
V
+
= 4.5V, V
–
= 0V
Overdrive > 30mV
= 0V
V
IN
= 5mV, V
OUT
= 0.4V
V
+
= 1.2V, V
–
= 0V
V
IN
= 5mV, V
OUT
= 0.4V
Negative Output Saturation
I
OUT
= 0mA
= 0.1mA
= 1mA
= 10mA
= 30mA
I
OUT
= 0mA
= 0.1mA
= 1mA
= 10mA
= 30mA
I
OUT
= 0mA
= 0.1mA
= 1mA
= 10mA
= 30mA
Positive Output Saturation
I
OUT
= 0µA
= 10µA
= 0µA
= 10µA
= 0µA
= 10µA
V
S
= 5V, V
OUT
= 40V
V
IN
≥
100mV
V
S
= 5V
V
+
= 4.5V, V
–
= 0V
V
IN
= –10mV
V
+
= 40V, V
–
25°C
q
ELECTRICAL CHARACTERISTICS
The
q
denotes specifications which apply over the operating temperature
MIN
96
95
82
110
105
100
100
94
30
25
10
30
25
25
25
15
25
LT1017
TYP
110
105
115
115
110
65
50
20
75
70
75
35
20
40
5
35
60
120
350
5
40
75
150
600
25
60
100
300
40
175
45
190
50
0.5
0.6
30
40
40
55
20
60
120
200
600
20
75
150
300
900
50
100
200
600
80
250
90
300
100
300
3
3
5
60
80
80
90
100
100
1.15
1.15
1.15
MAX
MIN
96
95
86
110
105
100
100
94
35
25
10
75
50
50
70
45
40
LT1018
TYP
110
105
100
125
120
110
70
50
30
250
220
200
140
120
110
5
35
60
120
350
8
35
70
150
500
10
60
110
300
900
35
175
45
190
50
1
1.8
110
110
130
140
15
60
120
250
700
20
70
150
300
900
40
100
200
400
80
250
90
300
100
300
8
10
15
250
250
300
250
270
300
1.2
1.2
1.2
MAX
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
mA
mA
mA
µA
µA
µA
µA
µA
µA
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
µA
µA
V
V
V
125°C
Gain
25°C
q
125°C
25°C
q
25°C
q
125°C
Output Source Current
25°C
q
125°C
25°C
q
125°C
25°C
25°C
25°C
25°C
25°C
q
q
q
q
q
V
+
= 4.5V, V
–
= 0V
V
IN
= –10mV
V
+
= 4.5V, V
–
= 0V
V
IN
= –10mV
125°C
125°C
125°C
125°C
125°C
25°C
25°C
q
q
125°C
125°C
25°C
q
Leakage Current
125°C
Supply Current
25°C
q
125°C
V
S
= 40V
25°C
q
125°C
Minimum Operating Voltage
I
OUT
= 1mA
25°C
q
125°C
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
–
≤
V
IN
≤
(V
+
– 0.9V).
Note 3:
No load gain is guaranteed but not tested (LT1017 only).
10178fc
3
LT1017/LT1018
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
100
3.0
2.5
INPUT OFFSET CURRENT (nA)
INPUT BIAS CURRENT (nA)
LT1018 V
CM
= V
–
10
LT1018 V
CM
= V
+
– 1V
LT1017 V
CM
= V
–
2.0
1.5
1.0
LT1018
0.5
LT1017
0
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
BIAS CURRENT (nA)
I
BIAS
REVERSES
POLARITY
LT1017 V
CM
= V
+
– 1V
1
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
1017/18 G01
Input Bias Current with Inputs
Driven Below the Supply
100
COMMON MODE VOLTAGE (V)
INPUT BIAS CURRENT (µA)
SUPPLY CURRENT (µA)
10
1
125°C
85°C 25°C
0.1
0.01
0.2
V
–
–0.2 –0.4 –0.6 –0.8
COMMON MODE VOLTAGE (V)
Positive Supply Current
10000
POSITIVE SUPPLY CURRENT (µA)
OUTPUT CURRENT LIMIT (mA)
SATURATION VOLTAGE (mV)
1000
LT1018
LT1017
100
10
0.1
1
10
OUTPUT SINK CURRENT (mA)
100
1017/18 G07
4
U W
1017/18 G04
Input Offset Current
20
Bias Current vs Differential Input
LT1018 + I
B
15
LT1018 – I
B
10
LT1017 + I
B
5
LT1017 – I
B
0
–20
–0.2
0.1
0.2
0
DIFFERENTIAL INPUT VOLTAGE (V)
–0.1
20
1017/18 G02
1017/18 G03
V
+
–0.4
–0.6
–0.8
–1.0
V
–
Common Mode Limits
160
140
V
CM
HIGH
Supply Current
V
SUPPLY
= 20V
LT1018
OUTPUTS LOW
LT1018
OUTPUTS HIGH
120
100
80
60
40
20
0
–50 –25
0
V
CM
LOW
–0.2
–0.4
–0.6
∆V
OS
= 0.5mV
VOLTAGES ARE REFERRED TO SUPPLIES
0
25 50 75 100 125 150
TEMPERATURE (°C)
1017/18 G05
LT1017
OUTPUTS LOW
LT1017
OUTPUTS HIGH
25 50 75 100 125 150
TEMPERATURE (°C)
1017/18 G06
–1.0
–0.8
–50 –25
NPN Output Saturation Voltage
1000
100
Output Sinking Current Limit
OUTPUT SHORTED TO V
+
80
LT1018
60
LT1017
100
125°C
25°C
–55°C
40
20
10
0.001
0
0.01
0.1
1
10
SINK CURRENT (mA)
100
1017/18 G08
1
10
TOTAL SUPPLY VOLTAGE (V)
100
1017/18 G09
10178fc
LT1017/LT1018
TYPICAL PERFOR A CE CHARACTERISTICS
Output Sinking Current Limit
100
OUTPUT SHORTED TO V
+
OUTPUT CURRENT LIMIT (mA)
TOTAL SWITCHING TIME (µs)
80
LT1018
V
S
= 5V
LT1017
V
S
= 5V
60
LT1018
V
S
= 40V
LT1017
V
S
= 40V
10
LT1018
FALL
LT1018
RISE
LT1017
RISE
DELAY TIME (µs)
40
20
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
1017/18 G10
Transition Time
100
10% V
FINAL
≤
V
OUT
≤
90% V
FINAL
V
OVERDRIVE
= 10mV
TRANSITION TIME (µs)
TRANSITION TIME (µs)
LT1017 RISE
10
LT1017 FALL/
LT1018 RISE
LT1018 FALL
1
0
10
20
30
TOTAL SUPPLY VOLTAGE (V)
40
1017/18 G13
LT1017 Response Time
V
IN
V
IN
V
OUT
0V
V
+
= 5V
5µs/DIV
V
–
= 0V
V
IN
= –100mV STEP
V
OVERDRIVE
= –10mV
1017/18 G17
U W
Total Switching Time
100
R
L
= 47k (LT1018)
R
L
= 200k (LT1017)
V
OUT
= 90% V
FINAL
V
OVERDRIVE
= 5mV
100
Output Delay
LT1017
RISE
LT1017
FALL
LT1017
FALL
10
LT1018
RISE
LT1018
FALL
1
–50 –25
1
V
OUT
= 10% V
FINAL
0.1
1
10
OVERDRIVE (mV)
100
1017/18 G12
0
25 50 75 100 125 150
TEMPERATURE (°C)
1017/18 G11
Positive Transition Time
10
V
IN
LT1017
V
SUP
= 2V
LT1017
V
SUP
= 40V
LT1018
V
SUP
= 40V
LT1018
V
SUP
= 2V
LT1017 Response Time
5V
R
L
= 10k
V
OUT
R
L
= 100k
R
L
=
∞
1
0V
10% V
FINAL
≤
V
OUT
≤
90% V
FINAL
V
OVERDRIVE
= 10mV
1k
100k
10k
PULL-UP RESISTOR (Ω)
1M
1017/18 G14
0.1
V
+
= 5V
5µs/DIV
V
–
= 0V
V
IN
= 100mV STEP
V
OVERDRIVE
= 10mV
1017/18 G15
LT1018 Response Time
V
IN
LT1018 Response Time
5V
R
L
= 10k
5V
V
OUT
R
L
= 100k
R
L
=
∞
5V
V
OUT
0V
0V
V
+
= 5V
2µs/DIV
V
–
= 0V
V
IN
= –100mV STEP
V
OVERDRIVE
= –10mV
1017/18 G18
V
+
= 5V
2µs/DIV
V
–
= 0V
V
IN
= 100mV STEP
V
OVERDRIVE
= 10mV
1017/18 G16
10178fc
5
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