TL331, TL331B, TL391B
TL331B,
TL391B
SLVS238J – AUGUST 1999TL331,
– REVISED
NOVEMBER
2020
SLVS238J – AUGUST 1999 – REVISED NOVEMBER 2020
www.ti.com
TL331B, TL391B and TL331 Single Comparators
1 Features
3 Description
•
•
The TL331B and TL391B devices are the next
generation versions of the industry-standard TL331
comparator. These next generation devices provide
outstanding value for cost-sensitive applications, with
features including lower offset voltage, higher supply
voltage capability, lower supply current, lower input
bias current, lower propagation delay, wider
temperature range and improved 2kV ESD
performance with drop-in replacement convenience.
The TL331B is a drop-in improved replacement for
both the TL331I and TL331K versions, while the
TL391B provides an alternate pinout of the TL331B to
replace competitive devices.
•
•
•
•
•
NEW TL331B and TL391B
Improved specifications of B-version
– Maximum rating: up to 38 V
– ESD rating (HBM): 2k V
– Improved reverse voltage performance
– Low input offset: 0.37 mV
– Low input bias current: 3.5 nA
– Low supply-current: 430 µA
– Faster response time of 1 µsec
– TL391B provides an alternate pinout
TL331B is improved drop-in replacement for
TL331
Common-mode input voltage range includes
ground
Differential input voltage range equal to maximumrated supply voltage: ±38 V
Low output saturation voltage
Output compatible with TTL, MOS, and CMOS
2 Applications
•
•
•
•
•
•
•
•
•
•
Vacuum robot
Single phase UPS
Server PSU
Cordless power tool
Wireless infrastructure
Appliances
Building automation
Factory automation & control
Motor drives
Infotainment & cluster
Operation from dual supplies also is possible as long
as the difference between the two supplies is within 2
V to 36 V, and VCC is at least 1.5 V more positive
than the input common-mode voltage. Current drain is
independent of the supply voltage. The outputs can
be connected to other open-collector outputs to
achieve wired-AND relationships.
Device Information
PART NUMBER(1)
TL331,
TL331B,
TL391B
(1)
PACKAGE
SOT-23 (5)
BODY SIZE (NOM)
2.90 mm × 1.60 mm
For all available packages, see the orderable addendum at
the end of the data sheet
Family Comparison Table
Specification
Supply Votlage
Total Supply Current (5V to 36V max)
Temperature Range
ESD (HBM)
Offset Voltage (Max over temp)
Input Bias Current (typ / max)
Response Time (typ)
TL331B
TL391B
TL331I
TL331K
2 to 36
2 to 36
2 to 36
V
0.43
0.7
0.7
mA
−40 to 125
-40 to 85
-40 to 105
°C
2000
1000
1000
V
Units
±4
±9
±9
mV
3.5 / 25
25 / 250
25 / 250
nA
1
1.3
1.3
µsec
An©IMPORTANT
NOTICEIncorporated
at the end of this data sheet addresses availability, warranty, changes, use in
safety-critical
applications,
Copyright
2020 Texas Instruments
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SLVS238J – AUGUST 1999 – REVISED NOVEMBER 2020
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
Pin Functions.................................................................... 3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings, TL331 and TL331K....... 4
6.2 Absolute Maximum Ratings, TL331B and TL391B..... 4
6.3 ESD Ratings, TL331 and TL331K...............................5
6.4 ESD Ratings, TL331B and TL391B............................ 5
6.5 Recommended Operating Conditions, TL331
and TL331K...................................................................5
6.6 Recommended Operating Conditions, TL331B
and TL391B...................................................................5
6.7 Thermal Information....................................................5
6.8 Electrical Characteristics, TL331B and TL391B......... 6
6.9 Switching Characteristics, TL331B and TL391B.........6
6.10 Electrical Characteristics, TL331 and TL331K..........7
6.11 Switching Characteristics, TL331 and TL331K......... 7
6.12 Typical Characteristics, TL331 and TL331K............. 8
6.13 Typical Characteristics, TL331B and TL391B...........9
7 Detailed Description......................................................15
7.1 Overview................................................................... 15
7.2 Functional Block Diagram......................................... 15
7.3 Feature Description...................................................15
7.4 Device Functional Modes..........................................15
8 Application and Implementation.................................. 16
8.1 Application Information............................................. 16
8.2 Typical Application.................................................... 16
9 Power Supply Recommendations................................18
10 Layout...........................................................................18
10.1 Layout Guidelines................................................... 18
10.2 Layout Example...................................................... 18
11 Device and Documentation Support..........................19
11.1 Documentation Support.......................................... 19
11.2 Receiving Notification of Documentation Updates.. 19
11.3 Support Resources................................................. 19
11.4 Trademarks............................................................. 19
11.5 Electrostatic Discharge Caution.............................. 19
11.6 Glossary.................................................................. 19
12 Mechanical, Packaging, and Orderable
Information.................................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision I (August 2020) to Revision J (November 2020)
Page
• Changed TL331B and TL391B minimum recommended supply voltage to 2V throughout................................1
• Corrected Family Comparison Table supply voltages for "B", "K" and "I" versions.............................................1
• Updated Supply Voltage vs Supply Current Typical Graph for 2V......................................................................9
Changes from Revision H (April 2020) to Revision I (August 2020)
Page
• Updated the numbering format for tables, figures, and cross-references throughout the document..................1
• Added "B" device Typical Char graphs............................................................................................................... 9
Changes from Revision G (January 2015) to Revision H (April 2020)
Page
• Added TL331B and TL391B tables and pinouts, Updated front page for new B devices for APL......................1
• Added Input current, IIK in Absolute Maximum Ratings ..................................................................................... 4
• Changed incorrect TL331 and TL331K Temp Ranges in Recommended Operating Conditions ...................... 5
• Changed text from: open-drain output to: open-collector output ..................................................................... 15
• Removed sentence: This is enables much head room for modern day supplies of 3.3 V and 5.0 V. .............. 15
• Changed the text 'The output NPN will sink current when the positive input voltage is higher than the negative
input voltage and the offset voltage' to 'The output NPN will sink current when the negative input voltage is
higher than the positive input voltage and the offset voltage.'.......................................................................... 15
• Changed Output Current specifications from: to: in Design Parameters ......................................................... 16
• Changed first paragraph of the Response Time section ................................................................................. 17
• Added Receiving Notification of Documentation Updates section and Community Resources section........... 19
2
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SLVS238J – AUGUST 1999 – REVISED NOVEMBER 2020
5 Pin Configuration and Functions
IN-
1
GND
2
IN+
3
5
VCC
4
OUT
+
Note reversed inputs compared to similar common pinout
Figure 5-1. TL331, TL331B DBV Package, 5-Pin SOT-23, Top View
1
GND
2
IN-
3
5
VCC
4
IN+
+
OUT
Note reversed inputs compared to similar common pinout
Figure 5-2. TL391B DBV Package, 5-Pin SOT-23, Top View
Pin Functions
PIN
NAME
TL331, TL331B
TL391B
TYPE
DESCRIPTION
NO.
NO.
IN+
3
4
IN–
1
3
I
Negative Input
OUT
4
1
O
Open Collector/Drain Output
VCC
5
5
—
Power Supply Input
GND
2
2
—
Ground
I
Positive Input
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SLVS238J – AUGUST 1999 – REVISED NOVEMBER 2020
6 Specifications
6.1 Absolute Maximum Ratings, TL331 and TL331K
over operating free-air temperature range (unless otherwise noted)(1)
VCC
Supply voltage(2)
voltage(3)
VID
Differential input
VI
Input voltage range (either input)
VO
IO
MIN
MAX
UNIT
0
36
V
–36
36
V
–0.3
36
V
Output voltage
0
36
V
Output current
0
20
mA
–50
mA
Duration of output short-circuit to ground(4)
IIK
Unlimited
Input current(5)
TJ
Operating virtual junction temperature
–40
150
°C
Tstg
Storage temperature
–65
150
°C
(1)
(2)
(3)
(4)
(5)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under
Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device
reliability.
All voltage values, except differential voltages, are with respect to the network ground.
Differential voltages are at IN+ with respect to IN–.
Short circuits from outputs to VCC can cause excessive heating and eventual destruction.
Input current flows thorough parasitic diode to ground and will turn on parasitic transistors that will increase ICC and may cause output
to be incorrect. Normal operation resumes when input current is removed.
6.2 Absolute Maximum Ratings, TL331B and TL391B
over operating free-air temperature range (unless otherwise noted)(1)
VCC
Supply voltage(2)
voltage(3)
MIN
MAX
UNIT
-0.3
38
V
VID
Differential input
–38
38
V
VI
Input voltage range (either input)
–0.3
38
V
VO
Output voltage
-0.3
38
V
IO
Output current
20
mA
–50
mA
Duration of output short-circuit to ground(4)
IIK
TJ
Operating virtual junction temperature
–40
150
°C
Tstg
Storage temperature
–65
150
°C
(1)
(2)
(3)
(4)
(5)
4
Unlimited
Input current(5)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under
Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device
reliability.
All voltage values, except differential voltages, are with respect to the network ground.
Differential voltages are at IN+ with respect to IN–.
Short circuits from outputs to VCC can cause excessive heating and eventual destruction.
Input current flows thorough parasitic diode to ground and will turn on parasitic transistors that will increase ICC and may cause output
to be incorrect. Normal operation resumes when input current is removed.
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6.3 ESD Ratings, TL331 and TL331K
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC
JS-001(1)
UNIT
±1000
Charged device model (CDM), per JEDEC specification JESD22-C101(2)
V
±750
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.4 ESD Ratings, TL331B and TL391B
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)
±2000
Charged device model (CDM), per JEDEC specification JESD22-C101(2)
±750
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.5 Recommended Operating Conditions, TL331 and TL331K
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
VCC
Supply voltage
2
36
V
TJ
Junction temperature, TL331
–40
85
°C
TJ
Junction temperature, TL331K
–40
105
°C
MIN
MAX
UNIT
2
36
V
–40
125
°C
6.6 Recommended Operating Conditions, TL331B and TL391B
over operating free-air temperature range (unless otherwise noted)
VCC
Supply voltage
TJ
Junction temperature
6.7 Thermal Information
THERMAL METRIC(1)
TL331,
TL331K
TL331B,
TL391B
DBV (SOT-23) DBV (SOT-23)
UNIT
5 PINS
5 PINS
RθJA
Junction-to-ambient thermal resistance
218.3
211.7
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
87.3
133.6
°C/W
RθJB
Junction-to-board thermal resistance
44.9
79.9
°C/W
ψJT
Junction-to-top characterization parameter
4.3
56.4
°C/W
ψJB
Junction-to-board characterization parameter
44.1
79.6
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
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SLVS238J – AUGUST 1999 – REVISED NOVEMBER 2020
6.8 Electrical Characteristics, TL331B and TL391B
VS = 5 V, VCM = (V–) ; TA = 25°C (unless otherwise noted).
PARAMETER
VIO
Input offset voltage
IB
Input bias current
IOS
Input offset current
VCM
Input voltage range
AVD
Large signal differential voltage
amplification
VOL
Low level output Voltage {swing
from (V–)}
IOH-LKG
High-level output leakage current
TEST CONDITIONS
VS = 5 to 36V
VS = 5 to 36V, TA = –40°C to +125°C
MIN
TYP
MAX
–2.5
±0.37
2.5
–4
4
–3.5
nA
–50
nA
10
nA
–25
25
nA
(V–) – 0.1
(V+) – 1.5
V
(V–) – 0.05
(V+) – 2.0
V
–10
TA = –40°C to +125°C
VS = 3 to 36V
VS = 15V, VO = 1.4V to 11.4V;
RL ≥ 15k to (V+)
50
ISINK ≤ 4mA, VID = -1V
±0.5
200
110
ISINK ≤ 4mA, VID = -1V
TA = –40°C to +125°C
(V+) = VO = 5 V; VID = 1V
IOH-LKG
High-level output leakage current
(V+) = VO = 36V; VID = 1V; TA = –40°C to +125°C
IOL
Low level output current
VOL = 1.5V; VID = -1V; VS = 5V
IQ
Quiescent current
mV
–25
TA = –40°C to +125°C
VS = 3 to 36V, TA = –40°C to +125°C
UNIT
0.1
V/mV
400
mV
550
mV
20
nA
1000
6
18
nA
mA
VS = 5 V, no load
210
330
µA
VS = 36 V, no load, TA = –40°C to +125°C
275
430
µA
6.9 Switching Characteristics, TL331B and TL391B
VS = 5V, VO_PULLUP = 5V, VCM = VS/2, CL = 15pF, RL = 5.1k Ohm, TA = 25°C (unless otherwise noted).
PARAMETER
tresponse
Propagation delay time, high-to-low;
Input overdrive = 5mV, Input step = 100mV
Small scale input signal (1)
tresponse
Propagation delay time, high-to-low;
TTL input with Vref = 1.4V
TTL input signal (1)
(1)
6
TEST CONDITIONS
MIN
TYP
MAX
UNIT
1000
ns
300
ns
High-to-low and low-to-high refers to the transition at the input.
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6.10 Electrical Characteristics, TL331 and TL331K
at specified free-air temperature, VCC = 5 V (unless otherwise noted)
TEST CONDITIONS(1)
PARAMETER
TA (3)
VIO
Input offset voltage
VCC = 5 V to 30 V, VO = 1.4 V, VIC = V
IIO
Input offset current
VO = 1.4 V
IIB
Input bias current
VO = 1.4 V
VICR
Common-mode input voltage
range(2)
AVD
Large-signal differential voltage
amplification
IOH
High-level output current
MAX
2
5
25°C
9
25°C
5
50
Full range
250
25°C
–25
Full range
Full range
VCC = 15 V, VO = 1.4 V to 11.4 V, R
L ≥ 15 kΩ to VCC
25°C
VOH = 5 V, VID = 1 V
25°C
VOH = 30 V, VID = 1 V
Full range
IOL = 4 mA, VID = –1 V
IOL
Low-level output current
VOL = 1.5 V, VID = –1 V
25°C
ICC
Supply current
RL = ∞, VCC = 5 V
25°C
–250
–400
0 to VCC –
1.5
50
25°C
Low-level output voltage
(3)
TYP
Full range
IC(min)
VOL
(1)
(2)
MIN
UNIT
mV
nA
nA
V
200
V/mV
0.1
50
nA
1
μA
150
400
Full range
700
6
mV
mA
0.4
0.7
mA
All characteristics are measured with zero common-mode input voltage, unless otherwise specified.
The voltage at either input or common-mode should not be allowed to go negative by more than 0.3 V. The upper end of the commonmode voltage range is VCC+ – 1.5 V, but either or both inputs can go to 30 V without damage.
Full range TA is –40°C to +85°C for I-suffix devices and –40°C to +105°C for K-suffix devices.
6.11 Switching Characteristics, TL331 and TL331K
VCC = 5 V, TA = 25°C
PARAMETER
Response time
(1)
(2)
TEST CONDITIONS
RL connected to 5 V through 5.1 kΩ, CL = 15 pF(1) (2)
TYP
100-mV input step with 5-mV overdrive
1.3
TTL-level input step
0.3
UNIT
μs
CL includes probe and jig capacitance.
The response time specified is the interval between the input step function and the instant when the output crosses 1.4 V.
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6.12 Typical Characteristics, TL331 and TL331K
1.0
70
-40C
0C
25C
85C
125C
60
Input Bias Current (nA)
Supply Current (mA)
0.8
0.6
0.4
0.2
-40C
0C
85C
125C
25C
50
40
30
20
10
0.0
0
0
10
20
30
40
Vcc (V)
0
8
16
Figure 6-1. Supply Current vs Supply Voltage
24
Vcc (V)
C001
32
40
C002
Figure 6-2. Input Bias Current vs Supply Voltage
Output Low Voltage, VOL(V)
10.000
1.000
0.100
0.010
0.001
0.01
-40C
0C
25C
85C
125C
0.1
1
10
Output Sink Current, Io(mA)
100
C005
Figure 6-3. Output Low Voltage vs Output Current (IOL)
8
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6.13 Typical Characteristics, TL331B and TL391B
TA = 25°C, VS = 5 V, RPULLUP = 5.1k, CL = 15 pF, VCM = 0 V, VUNDERDRIVE = 100 mV, VOVERDRIVE = 100 mV unless otherwise
noted.
300
250
No Load, Output High
280
230
Total Supply Current (PA)
Supply Current (PA)
260
240
220
200
180
-40°C
0°C
25°C
85°C
125°C
160
140
120
100
2
4
6
8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
Supply Voltage (V)
170
150
130
90
70
VS=3V
50
-0.2
0
250
230
230
210
210
190
170
150
130
-40°C
0°C
25°C
85°C
125°C
110
90
VS=5V
50
-0.5
0
0.5
1
1.5
2
2.5
Input Voltage (V)
3
0.4
0.6 0.8 1 1.2
Input Voltage (V)
1.4
1.6
1.8
2
3.5
170
150
130
4
-40°C
0°C
25°C
85°C
125°C
110
90
VS=5V
50
-0.5
0
0.5
1
1.5
2
2.5
Input Voltage (V)
3
3.5
4
Figure 6-7. Total Supply Current vs. Input Voltage at 5V
250
300
230
190
170
150
130
-40°C
0°C
25°C
85°C
125°C
110
90
VS=12V
0
1
2
3
4
5
6
7
Input Voltage (V)
8
9
10
11
Figure 6-8. Total Supply Current vs. Input Voltage at 12V
Total Supply Current (PA)
280
210
50
-1
0.2
190
70
Figure 6-6. Total Supply Current vs. Input Voltage at 3.3V
70
-40°C
0°C
25°C
85°C
125°C
110
250
70
Total Supply Current (PA)
190
Figure 6-5. Total Supply Current vs. Input Voltage at 3V
Total Supply Current (PA)
Total Supply Current (PA)
Figure 6-4. Supply Current vs. Supply Voltage
210
260
240
220
-40°C
0°C
25°C
85°C
125°C
200
180
VS=36V
160
-1
2
5
8
11
14 17 20 23
Input Voltage (V)
26
29
32
35
Figure 6-9. Total Supply Current vs. Input Voltage at 36V
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6.13 Typical Characteristics, TL331B and TL391B (continued)
TA = 25°C, VS = 5 V, RPULLUP = 5.1k, CL = 15 pF, VCM = 0 V, VUNDERDRIVE = 100 mV, VOVERDRIVE = 100 mV unless otherwise
noted.
0
0
Input Bias Current (nA)
-1
-1.5
-2
-2.5
-3
-3.5
-0.5
-1.5
-2
-2.5
-3
-4
-4
-4.5
-5
-0.5
-5
6
9
12
15 18 21 24
Supply Voltage (V)
27
30
33
36
VS=12V
2.5
3
3.5
0
Input Bias Current (nA)
Input Bias Current (nA)
1
1.5
2
Input Voltage (V)
VS=36V
0.5
-1
-1.5
-2
-2.5
-3
125°C
85°C
25°C
0°C
-40°C
-3.5
-4
-4.5
-5
-0.5 0.5
1.5
2.5
3.5 4.5 5.5 6.5
Input Voltage (V)
7.5
8.5
-0.5
-1
-1.5
-2
-2.5
-3
-4
-5
9.5 10.5
0
4
8
12
16
20
24
Input Voltage (V)
28
32
36
Figure 6-13. Input Bias Current vs. Input Voltage at 36V
2
1.5
1.5
Input Offset Voltage (mV)
2
1
0.5
0
-0.5
-1
TA = -40°C
63 Channels
-1.5
125°C
85°C
25°C
0°C
-40°C
-3.5
-4.5
Figure 6-12. Input Bias Current vs. Input Voltage at 12V
Input Offset Voltage (mV)
0.5
1
0
TA = 25°C
63 Channels
1
0.5
0
-0.5
-1
-1.5
-2
-2
3
6
9
12
15 18 21 24
Supply Voltage (V)
27
30
33
36
Figure 6-14. Input Offset Voltage vs. Supply Voltage at -40°C
10
0
Figure 6-11. Input Bias Current vs. Input Voltage at 5V
Figure 6-10. Input Bias Current vs. Supply Voltage
-0.5
125°C
85°C
25°C
0°C
-40°C
-3.5
-4.5
3
VS=5V
-1
Input Bias Current (nA)
125°C
85°C
25°C
0°C
-40°C
VCM=0V
-0.5
3
6
9
12
15 18 21 24
Supply Voltage (V)
27
30
33
36
Figure 6-15. Input Offset Voltage vs. Supply Voltage at 25°C
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6.13 Typical Characteristics, TL331B and TL391B (continued)
TA = 25°C, VS = 5 V, RPULLUP = 5.1k, CL = 15 pF, VCM = 0 V, VUNDERDRIVE = 100 mV, VOVERDRIVE = 100 mV unless otherwise
noted.
2
2
TA = 85°C
63 Channels
1
0.5
0
-0.5
-1
-1.5
0.5
0
-0.5
-1
-2
3
6
9
12
15 18 21 24
Supply Voltage (V)
27
30
33
36
Figure 6-16. Input Offset Voltage vs. Supply Voltage at 85°C
3
12
15 18 21 24
Supply Voltage (V)
27
30
33
36
0.5
0
-0.5
-1
VS = 5V
63 Units
1.5
Input Offset Voltage (mV)
1
-1.5
1
0.5
0
-0.5
-1
-1.5
-25
-10
5
20 35 50 65
Temperature (°C)
80
95
-2
-40
110 125
Figure 6-18. Input Offset Voltage vs. Temperature at 3V
-25
-10
5
20 35 50 65
Temperature (°C)
80
95
110 125
Figure 6-19. Input Offset Voltage vs. Temperature at 5V
2
2
VS = 12V
63 Units
1
0.5
0
-0.5
-1
-1.5
VS = 36V
63 Units
1.5
Input Offset Voltage (mV)
1.5
-2
-40
9
2
VS = 3V
63 Units
1.5
-2
-40
6
Figure 6-17. Input Offset Voltage vs. Supply Voltage at 125°C
2
Input Offset Voltage (mV)
1
-1.5
-2
Input Offset Voltage (mV)
TA = 125°C
63 Channels
1.5
Input Offset Voltage (mV)
Input Offset Voltage (mV)
1.5
1
0.5
0
-0.5
-1
-1.5
-25
-10
5
20 35 50 65
Temperature (°C)
80
95
110 125
Figure 6-20. Input Offset Voltage vs. Temperature at 12V
-2
-40
-25
-10
5
20 35 50 65
Temperature (°C)
80
95
110 125
Figure 6-21. Input Offset Voltage vs. Temperature at 36V
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6.13 Typical Characteristics, TL331B and TL391B (continued)
TA = 25°C, VS = 5 V, RPULLUP = 5.1k, CL = 15 pF, VCM = 0 V, VUNDERDRIVE = 100 mV, VOVERDRIVE = 100 mV unless otherwise
noted.
10
10
VS = 5V
1
100m
125°C
85°C
25°C
0°C
-40°C
10m
1m
10P
100P
1m
10m
Output Sinking Current (A)
Output Voltage to GND (V)
Output Voltage to GND (V)
VS = 3V
100m
125°C
85°C
25°C
0°C
-40°C
10m
1m
10P
100m
Figure 6-22. Output Low Voltage vs. Output Sinking Current at
3V
1
10
VS = 36V
1
100m
125°C
85°C
25°C
0°C
-40°C
10m
1m
10P
100P
1m
10m
Output Sinking Current (A)
0.2
0.1
0.05
5
20 35 50 65
Temperature (°C)
80
95
110 125
Figure 6-26. Output High Leakage Current vs.Temperature at 5V
12
125°C
85°C
25°C
0°C
-40°C
10m
100P
1m
10m
Output Sinking Current (A)
100m
Figure 6-25. Output Low Voltage vs.Output Sinking Current at
36V
Output High Leakage to GND (nA)
Output High Leakage to GND (nA)
2
1
0.5
-10
100m
100
50
Output set high
VOUT = VS
-25
1
1m
10P
100m
Figure 6-24. Output Low Voltage vs. Output Sinking Current at
12V
0.02
0.01
-40
Output Voltage to GND (V)
Output Voltage to GND (V)
VS = 12V
20
10
5
100m
Figure 6-23. Output Low Voltage vs. Output Sinking Current at
5V
10
100
50
100P
1m
10m
Output Sinking Current (A)
20
10
5
Output set high
VOUT = VS
2
1
0.5
0.2
0.1
0.05
0.02
0.01
-40
-25
-10
5
20 35 50 65
Temperature (°C)
80
95
110 125
Figure 6-27. Output High Leakage Current vs. Temperature at
36V
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6.13 Typical Characteristics, TL331B and TL391B (continued)
TA = 25°C, VS = 5 V, RPULLUP = 5.1k, CL = 15 pF, VCM = 0 V, VUNDERDRIVE = 100 mV, VOVERDRIVE = 100 mV unless otherwise
noted.
1000
VS = 5V
VCM = 0V
CL = 15pF
RP = 5.1k
900
800
125°C
85°C
25°C
-40°C
700
600
500
400
300
200
100
Propagation Delay, Low to High (ns)
Propagation Delay, High to Low (ns)
1000
0
20 30 4050 70 100
200 300 500
Input Overdrive (mV)
700
600
500
400
300
200
100
1000
Figure 6-28. High to Low Propagation Delay vs. Input Overdrive
Voltage, 5V
5 6 7 8 10
20 30 4050 70 100
200 300 500
Input Overdrive (mV)
1000
Figure 6-29. Low to High Propagation Delay vs. Input Overdrive
Voltage, 5V
1000
VS = 12V
VCM = 0V
CL = 15pF
RP = 5.1k
900
800
125°C
85°C
25°C
-40°C
700
600
500
400
300
200
100
Propagation Delay, Low to High (ns)
1000
Propagation Delay, High to Low (ns)
800
125°C
85°C
25°C
-40°C
0
5 6 7 8 10
0
VS = 12V
VCM = 0V
CL = 15pF
RP = 5.1k
900
800
125°C
85°C
25°C
-40°C
700
600
500
400
300
200
100
0
5 6 7 8 10
20 30 4050 70 100
200 300 500
Input Overdrive (mV)
1000
Figure 6-30. High to Low Propagation Delay vs. Input Overdrive
Voltage, 12V
5 6 7 8 10
20 30 4050 70 100
200 300 500
Input Overdrive (mV)
1000
Figure 6-31. Low to High Propagation Delay vs. Input Overdrive
Voltage, 12V
1000
VS = 36V
VCM = 0V
CL = 15pF
RP = 5.1k
900
800
125°C
85°C
25°C
-40°C
700
600
500
400
300
200
100
0
Propagation Delay, Low to High (ns)
1000
Propagation Delay, High to Low (ns)
VS = 5V
VCM = 0V
CL = 15pF
RP = 5.1k
900
VS = 36V
VCM = 0V
CL = 15pF
RP = 5.1k
900
800
125°C
85°C
25°C
-40°C
700
600
500
400
300
200
100
0
5 6 7 8 10
20 30 4050 70 100
200 300 500
Input Overdrive (mV)
1000
Figure 6-32. High to Low Propagation Delay vs. Input Overdrive
Voltage, 36V
5 6 7 8 10
20 30 4050 70 100
200 300 500
Input Overdrive (mV)
1000
Figure 6-33. Low to High Propagation Delay vs. Input Overdrive
Voltage, 36V
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6.13 Typical Characteristics, TL331B and TL391B (continued)
TA = 25°C, VS = 5 V, RPULLUP = 5.1k, CL = 15 pF, VCM = 0 V, VUNDERDRIVE = 100 mV, VOVERDRIVE = 100 mV unless otherwise
noted.
6
6
VREF = VCC/2
VREF = VCC/2
5
4
Output Voltage (V)
Output Voltage (V)
5
20mV Overdrive
3
5mV
Overdrive
2
1
100mV
Overdrive
0
-1
-0.1
20mV Overdrive
3
2
100mV
Overdrive
5mV Overdrive
1
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Time (Ps)
1
1.1
Figure 6-34. Response Time for Various Overdrives, High-toLow Transition
14
4
-1
-0.1
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Time (Ps)
1
1.1
Figure 6-35. Response Time for Various Overdrives, Low-toHigh Transition
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7 Detailed Description
7.1 Overview
The TL331 family is a single comparator with the ability to operate up to 36 V on the supply pin. This standard
device has proven ubiquity and versatility across a wide range of applications. This is due to its very wide supply
voltages range (2 V to 36 V), low Iq, and fast response.
The open-collector output allows the user to configure the output's logic low voltage (V OL) and can be utilized to
enable the comparator to be used in AND functionality.
The TL331B and TL391B are performance upgrades to standard TL331 using the latest process technologies
allowing for lower offset voltages, lower input bias and supply currents and faster response time over an
extended temperature range. The TL331B can drop-in replace the "I" or "K" versions of TL331. The TL391B is
an alternate pinout for replacing competitive devices.
7.2 Functional Block Diagram
VCC
80-mA
Current Regulator
10 mA
IN+
60 mA
10 mA
80 mA
COMPONENT COUNT
OUT
Epi-FET
Diodes
Resistors
Transistors
1
2
1
20
IN−
GND
Current values shown are nominal.
7.3 Feature Description
TL331x family consists of a PNP Darlington pair input, allowing the device to operate with very high gain and fast
response with minimal input bias current. The input Darlington pair creates a limit on the input common mode
voltage capability, allowing TL331x to accurately function from ground to VCC – 1.5 V differential input.
The output consists of an open collector NPN (pull-down or low side) transistor. The output NPN will sink current
when the negative input voltage is higher than the positive input voltage and the offset voltage. The VOL is
resistive and will scale with the output current. Please see Figure 6-3 for V OL values with respect to the output
current.
7.4 Device Functional Modes
7.4.1 Voltage Comparison
The TL331x operates solely as a voltage comparator, comparing the differential voltage between the positive
and negative pins and outputting a logic low or high impedance (logic high with pull-up) based on the input
differential polarity.
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8 Application and Implementation
Note
Information in the following applications sections is not part of the TI component specification, and TI
does not warrant its accuracy or completeness. TI’s customers are responsible for determining
suitability of components for their purposes. Customers should validate and test their design
implementation to confirm system functionality.
8.1 Application Information
TL331x will typically be used to compare a single signal to a reference or two signals against each other. Many
users take advantage of the open drain output to drive the comparison logic output to a logic voltage level to an
MCU or logic device. The wide supply range and high voltage capability makes TL331x optimal for level shifting
to a higher or lower voltage.
8.2 Typical Application
5V
Vref
5V
+
TL331
Input 0 V to 30 V
Figure 8-1. Typical Application Schematic
8.2.1 Design Requirements
For this design example, use the parameters listed in Table 8-1 as the input parameters.
Table 8-1. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
Input Voltage Range
0 V to VCC – 1.5 V
Supply Voltage
2 V to 36 V
Logic Supply Voltage (RPULLUP Voltage)
2 V to 36 V
Output Current (VLOGIC/RPULLUP)
1 µA to 4 mA
Input Overdrive Voltage
100 mV
Reference Voltage
2.5 V
Load Capacitance (CL)
15 pF
8.2.2 Detailed Design Procedure
When using TL331x in a general comparator application, determine the following:
•
•
•
•
Input voltage range
Minimum overdrive voltage
Output and drive current
Response time
8.2.2.1 Input Voltage Range
When choosing the input voltage range, the input common mode voltage range (V ICR) must be taken in to
account. If temperature operation is above or below 25°C the VICR can range from 0 V to VCC – 1.5 V. This limits
16
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the input voltage range to as high as V CC – 1.5 V and as low as 0 V. Operation outside of this range can yield
incorrect comparisons.
Below is a list of input voltage situation and their outcomes:
1. When both IN- and IN+ are both within the common mode range:
a. If IN- is higher than IN+ and the offset voltage, the output is low and the output transistor is sinking current
b. If IN- is lower than IN+ and the offset voltage, the output is high impedance and the output transistor is not
conducting
2. When IN- is higher than common mode and IN+ is within common mode, the output is low and the output
transistor is sinking current
3. When IN+ is higher than common mode and IN- is within common mode, the output is high impedance and
the output transistor is not conducting
4. When IN- and IN+ are both higher than common mode, the output is low and the output transistor is sinking
current
8.2.2.2 Minimum Overdrive Voltage
Overdrive Voltage is the differential voltage produced between the positive and negative inputs of the
comparator over the offset voltage (V IO). In order to make an accurate comparison the Overdrive Voltage (V OD)
should be higher than the input offset voltage (V IO). Overdrive voltage can also determine the response time of
the comparator, with the response time decreasing with increasing overdrive. Figure 8-2 and Figure 8-3 show
positive and negative response times with respect to overdrive voltage.
8.2.2.3 Output and Drive Current
Output current is determined by the load/pull-up resistance and logic/pull-up voltage. The output current will
produce a output low voltage (V OL) from the comparator. In which V OL is proportional to the output current. Use
Figure 6-3 to determine VOL based on the output current.
The output current can also effect the transient response. More is explained in the next section.
8.2.2.4 TL331B & TL391B ESD Protection
The "B" versions add dedicated ESD protections on all the pins for improved ESD performance. Please see
Application Note SNOAA35 for more information.
8.2.2.5 Response Time
Response time is a function of input over drive. See Section 8.2.3 for typical response times. The rise and fall
times can be determined by the load capacitance (C L), load/pullup resistance (R PULLUP), and equivalent
collector-emitter resistance (RCE).
•
•
The rise time (τR) is approximately τR ~ RPULLUP × CL
The fall time (τF) is approximatelyτF ~ RCE × CL
– RCE can be determined by taking the slope of Figure 6-3 in its linear region at the desired temperature, or
by dividing the VOL by Iout
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8.2.3 Application Curves
6
6
5
5
Output Voltage (Vo)
Output Voltage, Vo(V)
The following curves were generated with 5 V on VCC and VLogic, RPULLUP = 5.1 kΩ, and 50 pF scope probe.
4
3
5mV OD
2
1
20mV OD
0
4
3
2
5mV OD
1
20mV OD
0
100mV OD
±1
-0.25
0.25
0.75
1.25
1.75
100mV OD
±1
±0.25 0.00
2.25
Time (usec)
0.25
0.50
0.75
1.00
1.25
1.50
Time (usec)
C004
Figure 8-2. Response Time for Various Overdrives
(Positive Transition)
1.75
2.00
C006
Figure 8-3. Response Time for Various Overdrives
(Negative Transition)
9 Power Supply Recommendations
For fast response and comparison applications with noisy or AC inputs, it is recommended to use a bypass
capacitor on the supply pin to reject any variation on the supply voltage. This variation can eat into the
comparator's input common mode range and create an inaccurate comparison.
10 Layout
10.1 Layout Guidelines
For accurate comparator applications without hysteresis it is important maintain a stable power supply with
minimized noise and glitches, which can affect the high level input common mode voltage range. In order to
achieve this, it is best to add a bypass capacitor between the supply voltage and ground. This should be
implemented on the positive power supply and negative supply (if available). If a negative supply is not being
used, do not put a capacitor between the IC's GND pin and system ground.
10.2 Layout Example
Ground
Bypass
Capacitor
0.1 μF
Negative Supply or Ground
Only needed
for dual power
supplies
IN–
1
GND
IN+
3
5
V CC
4
OUT
Positive Supply
2
0.1 μF
Ground
Figure 10-1. TL331 Layout Example
18
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11 Device and Documentation Support
11.1 Documentation Support
11.1.1 Related Documentation
Application Design Guidelines for LM339, LM393, TL331 Family Comparators - SNOAA35
Analog Engineers Circuit Cookbook: Amplifiers (See Comparators section) - SLYY137
Precision Design, Comparator with Hysteresis Reference Design- TIDU020
Window comparator circuit - SBOA221
Reference Design, Window Comparator Reference Design- TIPD178
Comparator with and without hysteresis circuit - SBOA219
Inverting comparator with hysteresis circuit - SNOA997
Non-Inverting Comparator With Hysteresis Circuit - SBOA313
Zero crossing detection using comparator circuit - SNOA999
PWM generator circuit - SBOA212
How to Implement Comparators for Improving Performance of Rotary Encoder in Industrial Drive Applications SNOAA41
A Quad of Independently Func Comparators - SNOA654
11.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
11.3 Support Resources
TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight
from the experts. Search existing answers or ask your own question to get the quick design help you need.
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do
not necessarily reflect TI's views; see TI's Terms of Use.
11.4 Trademarks
TI E2E™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
11.5 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled
with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
11.6 Glossary
TI Glossary
This glossary lists and explains terms, acronyms, and definitions.
12 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGE OPTION ADDENDUM
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13-Aug-2021
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
TL331BIDBVR
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
331B
TL331IDBVR
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
(T1IG, T1IL, T1IS)
TL331IDBVRE4
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
T1IG
TL331IDBVRG4
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
T1IG
TL331IDBVT
ACTIVE
SOT-23
DBV
5
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
(T1IG, T1IL, T1IU)
TL331IDBVTG4
ACTIVE
SOT-23
DBV
5
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
T1IG
TL331KDBVR
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU | SN
Level-1-260C-UNLIM
-40 to 105
(T1KG, T1KJ, T1KL)
TL331KDBVRG4
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 105
(T1KG, T1KJ, T1KL)
TL331KDBVT
ACTIVE
SOT-23
DBV
5
250
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 105
(T1KG, T1KJ, T1KL)
TL391BIDBVR
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
391B
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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