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TLV3491, TLV3492, TLV3494
SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
TLV349x 1.8-V, Nanopower, Push-Pull Output Comparator
1 Features
3 Description
•
•
The TLV349x family of push-pull output comparators
features a fast 6-µs response time and < 1.2-µA
(maximum) nanopower capability, allowing operation
from 1.8 V to 5.5 V. Input common-mode range
beyond supply rails make the TLV349x an ideal
choice for low-voltage applications.
1
•
•
•
•
Very Low Supply Current: 0.8 µA (Typical)
Input Common-Mode Range: 200-mV Beyond
Supply Rails
Supply Voltage: 1.8 V to 5.5 V
High Speed: 6 µs
Push-Pull CMOS Output Stage
Small Packages:
– 5-Pin SOT-23 (Single)
– 8-Pin SOT-23 (Dual)
Micro-sized packages provide options for portable
and space-restricted applications. The single
(TLV3491) is available in 5-pin SOT-23 and 8-pin
SOIC packages. The dual (TLV3492) comes in 8-pin
SOT-23 and SOIC packages. The quad (TLV3494) is
available in both 14-pin TSSOP and SOIC packages.
2 Applications
•
•
•
•
•
The TLV349x is excellent for power-sensitive, lowvoltage (two-cell) applications.
Portable Medical Equipment
Wireless Security Systems
Remote Control Systems
Handheld Instruments
Ultra-Low Power Systems
Device Information(1)
PART NUMBER
TLV3491
TLV3492
TLV3494
PACKAGE
BODY SIZE (NOM)
SOT-23 (5)
2.90 mm × 1.60 mm
SOIC (8)
4.90 mm × 3.91 mm
SOT-23 (8)
2.90 mm × 1.63 mm
SOIC (8)
4.90 mm × 3.91 mm
SOIC (14)
8.65 mm × 3.91 mm
TSSOP (14)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
TLV349x Basic Connections
V+
0.01 mF
10 mF
VIN
TLV349x
VOUT
VREF
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TLV3491, TLV3492, TLV3494
SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
www.ti.com
Table of Contents
1
2
3
4
5
6
7
8
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
3
5
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
5
5
5
5
5
6
6
6
7
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information: TLV3491 .................................
Thermal Information: TLV3492 .................................
Thermal Information: TLV3494 .................................
Electrical Characteristics: VS = 1.8 V to 5.5 V ..........
Switching Characteristics ..........................................
Typical Characteristics ..............................................
Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 11
9
Application and Implementation ........................ 12
9.1 Application Information............................................ 12
9.2 Typical Applications ................................................ 12
10 Power Supply Recommendations ..................... 15
11 Layout................................................................... 15
11.1 Layout Guidelines ................................................. 15
11.2 Layout Example .................................................... 15
12 Device and Documentation Support ................. 16
12.1
12.2
12.3
12.4
12.5
12.6
Device Support......................................................
Related Links ........................................................
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
16
17
17
17
17
17
13 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
Changes from Revision D (April 2005) to Revision E
Page
•
Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
•
Changed Related Products To: Device Comparison.............................................................................................................. 3
•
Deleted Package/Ordering Information table; see Package Option Addendum at the end of the data sheet ....................... 3
•
Deleted Lead temperature from Absolute Maximum Ratings................................................................................................. 5
•
Changed Thermal Resistance, RθJA, in Thermal Information: TLV3491 From: 200°C/W To: 237.8°C/W (SOT-23) and
From: 150°C/W To: 201.9°C/W (SOIC).................................................................................................................................. 5
•
Changed Thermal Resistance, RθJA, in Thermal Information: TLV3492 From: 200°C/W To: 135.4°C/W (SOT-23) and
From: 150°C/W To: 201.9°C/W (SOIC).................................................................................................................................. 5
•
Changed Thermal Resistance, RθJA, in Thermal Information: TLV3494 From: 100°C/W To: 83.8°C/W (SOIC) and
From: 100°C/W To: 120.8°C/W (TSSOP) .............................................................................................................................. 6
2
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SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
5 Device Comparison Table
PRODUCT
FEATURES
TLV370x
560-nA, 2.5-V to 16-V, push-pull CMOS output stage comparators
TLV340x
550-nA, 2.5-V to 16-V, open-drain output stage comparators
6 Pin Configuration and Functions
TLV3491 DBV Package
5-Pin SOT-23
Top View
TLV3491 D Package
8-Pin SOIC
Top View
Pin Functions: TLV3491
PIN
NAME
I/O
DESCRIPTION
SOT-23
SOIC
–IN
4
2
I
Inverting input
+IN
3
3
I
Noninverting input
NC
—
1, 5, 8
—
No internal connection (can be left floating)
OUT
1
6
O
Output
V+
5
7
—
Positive (highest) power supply
V–
2
4
—
Negative (lowest) power supply
TLV3492 DCN and D Packages
8-Pin SOT-23 and SOIC
Top View
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SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
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Pin Functions: TLV3492
PIN
I/O
DESCRIPTION
NAME
NO.
–IN A
2
I
Inverting input, channel A
–IN B
6
I
Inverting input, channel B
+IN A
3
I
Noninverting input, channel A
+IN B
5
I
Noninverting input, channel B
OUT A
1
O
Output, channel A
OUT B
7
O
Output, channel B
V–
4
—
Negative (lowest) power supply
V+
8
—
Positive (highest) power supply
TLV3494 D and PW Packages
14-Pin SOIC and TSSOP
Top View
Pin Functions: TLV3494
PIN
I/O
DESCRIPTION
NAME
NO.
–In A
2
I
Inverting input, channel A
–In B
6
I
Inverting input, channel B
–In C
9
I
Inverting input, channel C
–In D
13
I
Inverting input, channel D
+In A
3
I
Noninverting input, channel A
+In B
5
I
Noninverting input, channel B
+In C
10
I
Noninverting input, channel C
+In D
12
I
Noninverting input, channel D
Out A
1
O
Output, channel A
Out B
7
O
Output, channel B
Out C
8
O
Output, channel C
Out D
14
O
Output, channel D
V–
11
—
Negative (lowest) power supply
V+
4
—
Positive (highest) power supply
4
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SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
MIN
Supply
Voltage
Current
V
(V–) – 0.5
(V+) + 0.5
V
Signal input pin
–10
10
mA
125
°C
150
°C
150
°C
Continuous
Operating, TA
–40
Junction, TJ
Storage, Tstg
(1)
UNIT
5.5
Signal input pin
Output short circuit
Temperature
MAX
–65
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.
7.2 ESD Ratings
V(ESD)
(1)
Electrostatic discharge
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1)
VALUE
UNIT
±3000
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
TA
MIN
MAX
Supply voltage
1.8
5.5
UNIT
V
Specified temperature
–40
125
°C
7.4 Thermal Information: TLV3491
TLV3491
THERMAL METRIC (1)
DBV (SOT-23)
D (SOIC)
5 PINS
8 PINS
UNIT
RθJA
Junction-to-ambient thermal resistance
237.8
201.9
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
108.7
92.5
°C/W
RθJB
Junction-to-board thermal resistance
64.1
123.3
°C/W
ψJT
Junction-to-top characterization parameter
12.1
23
°C/W
ψJB
Junction-to-board characterization parameter
63.3
212.6
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
—
—
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
7.5 Thermal Information: TLV3492
TLV3492
THERMAL METRIC (1)
DCN (SOT-23)
D (SOIC)
8 PINS
8 PINS
UNIT
RθJA
Junction-to-ambient thermal resistance
135.4
201.9
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
68.1
92.5
°C/W
RθJB
Junction-to-board thermal resistance
48.9
123.3
°C/W
ψJT
Junction-to-top characterization parameter
9.9
23
°C/W
ψJB
Junction-to-board characterization parameter
48.4
212.6
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
—
—
°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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7.6 Thermal Information: TLV3494
TLV3494
THERMAL METRIC (1)
D (SOIC)
PW (TSSOP)
14 PINS
14 PINS
UNIT
RθJA
Junction-to-ambient thermal resistance
83.8
120.8
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
70.7
34.3
°C/W
RθJB
Junction-to-board thermal resistance
59.5
62.8
°C/W
ψJT
Junction-to-top characterization parameter
11.6
1
°C/W
ψJB
Junction-to-board characterization parameter
37.7
56.5
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
—
—
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
7.7 Electrical Characteristics: VS = 1.8 V to 5.5 V
at TA = 25°C and VS = 1.8 V to 5.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
±3
±15
UNIT
OFFSET VOLTAGE
VOS
Input offset voltage
TA = 25°C, VCM = 0 V, IO = 0 V
dVOS/dT
Input offset voltage versus temperature
TA = –40°C to 125°C
±12
mV
PSRR
Input offset voltage versus power supply
VS = 1.8 V to 5.5 V
350
1000
µV/V
µV/°C
INPUT BIAS CURRENT
IB
Input bias current
VCM = VCC/2
±1
±10
pA
IOS
Input offset current
VCM = VCC/2
±1
±10
pA
(V+) + 0.2 V
V
INPUT VOLTAGE
VCM
Common-mode voltage
CMRR
(V–) – 0.2 V
Common-mode rejection ratio
VCM = –0.2 V to (V+) – 1.5 V
60
74
VCM = –0.2 V to (V+) + 0.2 V
54
62
dB
INPUT CAPACITANCE
Common-mode
2
pF
Differential
4
pF
OUTPUT (VS = 5 V)
VOH
Voltage output high from rail
IOUT = 5 mA
90
200
mV
VOL
Voltage output low from rail
IOUT = 5 mA
160
200
mV
ISC
Short-circuit current
V
See Typical Characteristics
POWER SUPPLY
VS
1.8
5.5
Operating voltage
1.8
5.5
V
0.85
1.2
µA
TYP
MAX
Quiescent current (1)
IQ
(1)
Specified voltage
VO = 5 V, VO = high
IQ per channel
7.8 Switching Characteristics
at f = 10 kHz, VSTEP = 1 V, TA = 25°C, and VS = 1.8 V to 5.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
t(PLH)
Propagation delay time, low-to-high
t(PLH)
Propagation delay time, high-to-low
tR
tF
6
MIN
Input overdrive = 10 mV
12
Input overdrive = 100 mV
6
UNIT
µs
Input overdrive = 10 mV
13.5
Input overdrive = 100 mV
6.5
Rise time
CL = 10 pF
100
ns
Fall time
CL = 10 pF
100
ns
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µs
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7.9 Typical Characteristics
at TA = 25°C, VS = 1.8 V to 5.5 V, and input overdrive = 100 mV (unless otherwise noted)
12
1.00
VDD = 3V
VS = 5V
10
Quiescent Current (mA)
Quiescent Current (mA)
0.95
0.90
VDD = 5V
0.85
VDD = 1.8V
0.80
0.75
0.70
6
4
VS = 3V
2
0.65
VS = 1.8V
0
0.60
-50
0
-25
25
75
50
100
10
1
125
100
1k
10k
100k
Temperature (°C)
Output Transition Frequency (Hz)
Figure 1. Quiescent Current vs Temperature
Figure 2. Quiescent Current vs Output Switching Frequency
45
140
40
Input Bias Current (pA)
120
Short-Circuit Current (mA)
8
100
Sink
80
60
Source
40
20
35
30
25
20
15
10
5
0
0
-5
1.5
2
2.5
3
3.5
4
5
4.5
5.5
-50
0
-25
25
75
50
100
125
Temperature (°C)
Supply Voltage (V)
Figure 3. Short-Circuit Current vs Supply Voltage
Figure 4. Input Bias Current vs Temperature
0.25
0.25
VDD = 3V
0.2
0.2
VDD = 1.8V
VDD = 3V
VS - VOH (V)
VOL (V)
VDD = 1.8V
0.15
VDD = 5V
0.1
0.15
0.1
VDD = 5V
0.05
0.05
0
0
0
2
4
6
8
10
12
0
2
Figure 5. Output Low vs Output Current
4
6
8
10
12
Output Current (mA)
Output Current (mA)
Figure 6. Output High vs Output Current
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Typical Characteristics (continued)
80
80
70
70
60
60
50
tPHL (ms)
tPLH (ms)
at TA = 25°C, VS = 1.8 V to 5.5 V, and input overdrive = 100 mV (unless otherwise noted)
VDD = 5V
40
VDD = 3V
30
10
VDD = 1.8V
0
0.01
0.1
1
10
100
0
0.01
1k
0.1
1
10
100
1k
Capacitive Load (nF)
Capacitive Load (nF)
Figure 7. Propagation Delay (tPLH) vs Capacitive Load
Figure 8. Propagation Delay (tPHL) vs Capacitive Load
20
20
18
18
16
16
14
tPHL (ms)
VDD = 5V
12
VDD = 3V
10
14
12
VDD = 1.8V
10
VDD = 1.8V
8
8
6
6
4
4
0
10
20
30
40
50
60
70
80
90
VDD = 3V
VDD = 5V
0
100
10
20
30
Figure 9. Propagation Delay (tPLH) vs Input Overdrive
50
60
70
80
90
100
Figure 10. Propagation Delay (tPHL) vs Input Overdrive
8.0
8.0
7.5
7.5
7.0
VDD = 1.8V
7.0
VDD = 3V
tPHL (ms)
VDD = 1.8V
6.5
40
Input Overdrive (mV)
Input Overdrive (mV)
tPLH (ms)
VDD = 5V
20
10
tPLH (ms)
VDD = 3V
40
30
VDD = 1.8V
20
50
VDD = 3V
6.0
6.5
6.0
5.5
5.5
5.0
5.0
VDD = 5V
VDD = 5V
4.5
4.5
4.0
4.0
-50
8
-25
0
25
75
50
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Figure 11. Propagation Delay (tPLH) vs Temperature
Figure 12. Propagation Delay (tPHL) vs Temperature
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Typical Characteristics (continued)
at TA = 25°C, VS = 1.8 V to 5.5 V, and input overdrive = 100 mV (unless otherwise noted)
VIN-
VDD = ±2.5V
VIN+
500mV/div
500mV/div
VDD = ±2.5V
VIN-
VOUT
2V/div
2V/div
VIN+
VOUT
2ms/div
2ms/div
Figure 13. Propagation Delay (tPLH)
Figure 14. Propagation Delay (tPHL)
VIN-
VDD = ±0.9V
VIN+
500mV/div
500mV/div
VDD = ±0.9V
VIN-
VIN+
2V/div
2V/div
VOUT
VOUT
2ms/div
2ms/div
Figure 15. Propagation Delay (tPLH)
Figure 16. Propagation Delay (tPHL)
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8 Detailed Description
8.1 Overview
The TLV349x family of comparators features rail-to-rail input and output on supply voltages as low as 1.8 V. The
push-pull output stage is optimal for reduced power budget applications and features no shoot-through current.
Low supply voltages, common-mode input range beyond supply rails, and a typical supply current of 0.8 µA
make the TLV349x family an excellent candidate for battery-powered applications with single-cell operation as
well as a wide range of low-voltage applications. The devices are available in a selection of micro-sized
packages for space-constrained and portable applications.
8.2 Functional Block Diagram
V+
+IN
OUT
± IN
V±
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8.3 Feature Description
8.3.1 Operating Voltage
The TLV349x comparators are specified for use on a single supply from 1.8 V to 5.5 V (or a dual supply from
±0.9 V to ±2.75 V) over a temperature range of −40°C to 125°C.
8.3.2
Input Overvoltage Protection
The device inputs are protected by electrostatic discharge (ESD) diodes that conduct if the input voltages exceed
the power supplies by more than approximately 500 mV. Momentary voltages greater than 500 mV beyond the
power supply can be tolerated if the input current is limited to 10 mA. This limiting is easily accomplished with a
small input resistor in series with the input to the comparator.
8.3.3 Setting Reference Voltage
It is important to use a stable reference when setting the transition point for the TLV349x. The REF1004 provides
a 1.25-V reference voltage with low drift and only 8 µA of quiescent current.
8.3.4 External Hysteresis
Comparator inputs have no noise immunity within the range of specified offset voltage (±15 mV). For noisy input
signals, the comparator output typically displays multiple switching as input signals move through the switching
threshold. The typical comparator threshold of the TLV349x is ±15 mV. To prevent multiple switching within the
comparator threshold of the TLV349x, external hysteresis must be added by connecting a small amount of
feedback to the positive input. Figure 17 shows a typical topology used to introduce hysteresis, described in
Equation 1.
+
VHYST =
V ´ R1
R1 + R2
(1)
VHYST sets the value of the transition voltage required to switch the comparator output by increasing the threshold
region, thereby reducing sensitivity to noise.
10
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Feature Description (continued)
V+
5.0 V
VHYST = 0.38 V
VIN
TLV349x
VOUT
R2
560 kW
R1
39 kW
VREF
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Figure 17. Adding Hysteresis to the TLV349x
8.4 Device Functional Modes
The TLV349x has a single functional mode and is operational when the power-supply voltage is between 1.8 V
and 5.5 V.
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9 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.
9.1 Application Information
The TLV349x family of comparators features rail-to-rail input and output on supply voltages as low as 1.8 V. The
push-pull output stage is optimal for reduced power budget applications and features no shoot-through current.
Low supply voltages, common-mode input range beyond supply rails, and a typical supply current of 0.8 µA
make the TLV349x family an excellent candidate for battery-powered applications with single-cell operation.
9.2 Typical Applications
9.2.1 TLV3491 Configured as an AC-Coupled Comparator
One of the benefits of AC coupling a single-supply comparator circuit is that it can block dc offsets induced by
ground-loop offsets that could potentially produce either a false trip or a common-mode input violation. Figure 18
shows the TLV3491 configured as an AC-coupled comparator.
R9
866 W
Cable
C1 1 mF
R3
1 kW
VIN+
R1
1 kW
VM1
R10
50 W
VOUT
3.3 V
VIN
R2
1 kW
C2 1 mF
3.3 V
+
R4
1 kW
V2
3.3 V
VINVCM 100 m
+
Ground mismatch in signal source
vs conditioning circuit
Copyright © 2016, Texas Instruments Incorporated
Figure 18. TLV3491 Configured as an AC-Coupled Comparator (Schematic)
9.2.1.1 Design Requirements
Design requirements include:
1. Ability to tolerate up to ±100 mV of common-mode signal.
2. Trigger only on AC signals (such as zero-cross detection).
12
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Typical Applications (continued)
9.2.1.2 Detailed Design Procedure
Design analysis:
• AC-coupled, high-pass frequency
• Large capacitors require longer start-up time from device power on
• Use 1-µF capacitor to achieve high-pass frequency of approximately 159 Hz
• For high-pass equivalent, use CIN = 0.5 µF, RIN = 2 kΩ
1. Set up input dividers initially for one-half supply (to be in center of acceptable common-mode range).
2. Adjust either divider slightly upwards or downwards as desired to establish quiescent output condition.
3. Select coupling capacitors based on lowest expected frequency.
9.2.1.3 Application Curve
4
VIN
VCM
VOUT
Voltage (V)
3
2
1
0
-1
0
100m
Time (s)
200m
Figure 19. AC-Coupled Comparator Results
9.2.2 Relaxation Oscillator
The TLV349x can be configured as a relaxation oscillator to provide a simple and inexpensive clock output, as
Figure 20 shows. The capacitor is charged at a rate of 0.69 RC. It also discharges at a rate of 0.69RC.
Therefore, the period is 1.38 RC. R1 may be a different value than R2.
VC
2/3 (V+)
1/3 (V+)
t
V+ T1 T2
V+
C
1000pF
R1
1MW
R2
1MW
R2
1MW
VOUT
t
f = 724 Hz
V+
R2
1MW
Figure 20. TLV349x Configured as a Relaxation Oscillator
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Typical Applications (continued)
9.2.3 Power-On Reset
The reset circuit shown in Figure 21 provides a time-delayed release of reset to the MSP430 microcontroller.
Operation of the circuit is based on a stabilization time constant of the supply voltage, rather than on a
predetermined voltage value. The negative input is a reference voltage created by a simple resistor divider.
These resistor values must be relatively high to reduce the current consumption of the circuit. The positive input
is an RC circuit that provides a power-up delay. When power is applied, the output of the comparator is low,
holding the processor in the reset condition. Only after allowing time for the supply voltage to stabilize does the
positive input of the comparator become higher than the negative input, resulting in a high output state and
releasing the processor for operation. The stabilization time required for the supply voltage is adjustable by the
selection of the RC component values.
Use of a lower-valued resistor in this portion of the circuit does not increase current consumption because no
current flows through the RC circuit after the supply has stabilized. The required reset delay time depends on the
power-up characteristics of the system power supply. R1 and C1 are selected to allow enough time for the power
supply to stabilize. D1 provides rapid reset if power is lost. In this example, the R1 × C1 time constant is 10 ms.
V+
R1
1 MW
C1
10 nF
MSP430
R2
2 MW
TLV349x
RESET
R3
2 MW
Copyright © 2016, Texas Instruments Incorporated
Figure 21. The TLV349x Configured as a Reset Circuit for the MSP430
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SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
10 Power Supply Recommendations
The TLV349x family of devices is specified for operation from 1.8 V to 5.5 V (±0.9 V to ±2.75 V). Parameters that
can exhibit significant variance with regard to operating voltage are presented in Typical Characteristics.
11 Layout
11.1 Layout Guidelines
Figure 22 shows the typical connections for the TLV349x. To minimize supply noise, power supplies must be
capacitively decoupled by a 0.01-µF ceramic capacitor in parallel with a 10-µF electrolytic capacitor.
Comparators are very sensitive to input noise. Proper grounding (the use of a ground plane) helps to maintain
the specified performance of the TLV349x family.
For best results, maintain the following layout guidelines:
1. Use a printed-circuit board (PCB) with a good, unbroken low-inductance ground plane.
2. Place a decoupling capacitor (0.1-µF ceramic, surface-mount capacitor) as close as possible to VCC.
3. On the inputs and the output, keep lead lengths as short as possible to avoid unwanted parasitic feedback
around the comparator. Keep inputs away from the output.
4. Solder the device directly to the PCB rather than using a socket.
5. For slow-moving input signals, take care to prevent parasitic feedback. A small capacitor (1000 pF or less)
placed between the inputs can help eliminate oscillations in the transition region. This capacitor causes some
degradation to propagation delay when the impedance is low. The topside ground plane runs between the
output and inputs.
6. The ground pin ground trace runs under the device up to the bypass capacitor, shielding the inputs from the
outputs.
11.2 Layout Example
Power supply
(1.8 V to 5.5 V)
0.01 µF
10 F
V+
+IN
OUT
± IN
V±
OUT
V+
1
V±
5
0.01 µF
10 F
2
±
+
3
4
Not to scale
+IN
±IN
Copyright © 2016, Texas Instruments Incorporated
Figure 22. Basic Connections of the TLV349x
Copyright © 2002–2016, Texas Instruments Incorporated
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TLV3491, TLV3492, TLV3494
SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
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12 Device and Documentation Support
12.1 Device Support
12.1.1 Development Support
12.1.1.1 TINA-TI™ (Free Software Download)
TINA™ is a simple, powerful, and easy-to-use circuit simulation program based on a SPICE engine. TINA-TI™ is
a free, fully-functional version of the TINA software, preloaded with a library of macro models in addition to a
range of both passive and active models. TINA-TI provides all the conventional dc, transient, and frequency
domain analysis of SPICE, as well as additional design capabilities.
Available as a free download from the Analog eLab Design Center, TINA-TI offers extensive post-processing
capability that allows users to format results in a variety of ways. Virtual instruments offer the ability to select
input waveforms and probe circuit nodes, voltages, and waveforms, creating a dynamic quick-start tool.
NOTE
These files require that either the TINA software (from DesignSoft™) or TINA-TI software
be installed. Download the free TINA-TI software from the TINA-TI folder.
12.1.1.2 DIP Adapter EVM
The DIP Adapter EVM tool provides an easy, low-cost way to prototype small surface mount ICs. The evaluation
tool these TI packages: D or U (SOIC-8), PW (TSSOP-8), DGK (MSOP-8), DBV (SOT23-6, SOT23-5 and
SOT23-3), DCK (SC70-6 and SC70-5), and DRL (SOT563-6). The DIP Adapter EVM may also be used with
terminal strips or may be wired directly to existing circuits.
12.1.1.3 Universal Op Amp EVM
The Universal Op Amp EVM is a series of general-purpose, blank circuit boards that simplify prototyping circuits
for a variety of IC package types. The evaluation module board design allows many different circuits to be
constructed easily and quickly. Five models are offered, with each model intended for a specific package type.
PDIP, SOIC, MSOP, TSSOP and SOT23 packages are all supported.
NOTE
These boards are unpopulated, so users must provide their own ICs. TI recommends
requesting several op amp device samples when ordering the Universal Op Amp EVM.
12.1.1.4 TI Precision Designs
TI Precision Designs are analog solutions created by TI’s precision analog applications experts and offer the
theory of operation, component selection, simulation, complete PCB schematic and layout, bill of materials, and
measured performance of many useful circuits. TI Precision Designs are available online at
http://www.ti.com/ww/en/analog/precision-designs/.
12.1.1.5 WEBENCH® Filter Designer
WEBENCH® Filter Designer is a simple, powerful, and easy-to-use active filter design program. The WEBENCH
Filter Designer lets you create optimized filter designs using a selection of TI operational amplifiers and passive
components from TI's vendor partners.
Available as a web-based tool from the WEBENCH® Design Center, WEBENCH® Filter Designer allows you to
design, optimize, and simulate complete multistage active filter solutions within minutes.
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TLV3491, TLV3492, TLV3494
www.ti.com
SBOS262E – DECEMBER 2002 – REVISED DECEMBER 2016
12.2 Related Links
Table 1 lists quick access links. Categories include technical documents, support and community resources,
tools and software, and quick access to sample or buy.
Table 1. Related Links
PARTS
PRODUCT FOLDER
SAMPLE & BUY
TECHNICAL
DOCUMENTS
TOOLS &
SOFTWARE
SUPPORT &
COMMUNITY
TLV3491
Click here
Click here
Click here
Click here
Click here
TLV3492
Click here
Click here
Click here
Click here
Click here
TLV3494
Click here
Click here
Click here
Click here
Click here
12.3 Community Resources
The following links connect to TI community resources. Linked contents are 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.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
12.4 Trademarks
TINA-TI, E2E are trademarks of Texas Instruments.
WEBENCH is a registered trademark of Texas Instruments.
TINA, DesignSoft are trademarks of DesignSoft, Inc.
All other trademarks are the property of their respective owners.
12.5 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
12.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
13 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.
Copyright © 2002–2016, Texas Instruments Incorporated
Product Folder Links: TLV3491 TLV3492 TLV3494
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PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
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)
Samples
(4/5)
(6)
TLV3491AID
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
TLV
3491
Samples
TLV3491AIDBVR
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
VBNI
Samples
TLV3491AIDBVRG4
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
VBNI
Samples
TLV3491AIDBVT
ACTIVE
SOT-23
DBV
5
250
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
VBNI
Samples
TLV3491AIDBVTG4
ACTIVE
SOT-23
DBV
5
250
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
VBNI
Samples
TLV3491AIDR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
TLV
3491
Samples
TLV3492AID
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
TLV
3492
Samples
TLV3492AIDCNR
ACTIVE
SOT-23
DCN
8
3000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
VBO1
Samples
TLV3492AIDCNT
ACTIVE
SOT-23
DCN
8
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
VBO1
Samples
TLV3492AIDR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
TLV
3492
Samples
TLV3494AID
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
TLV3494
Samples
TLV3494AIPWR
ACTIVE
TSSOP
PW
14
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
TLV
3494
Samples
TLV3494AIPWT
ACTIVE
TSSOP
PW
14
250
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
TLV
3494
Samples
(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".
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
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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