LM2902-Q1, LM2902B-Q1, LM2902BA-Q1
SGLS178F – AUGUST 2003 – REVISED MAY 2022
LM2902-Q1, LM2902B-Q1, and LM2902BA-Q1 Industry-Standard Quad Operational
Amplifiers for Automotive Applications
1 Features
3 Description
•
This device consists of four independent high-gain
frequency-compensated operational amplifiers that
are designed specifically to operate from a single
supply over a wide range of voltages. Operation from
split supplies is possible when the difference between
the two supplies is 3 V to 36 V (for B-version devices),
3 V to 32 V (for V-version devices) or 3 V to 26
V (for all other devices), and VCC is at least 1.5 V
more positive than the input common-mode voltage.
The low supply-current drain is independent of the
magnitude of the supply voltage.
•
•
•
•
•
•
•
AEC Q-100 qualified for automotive applications
– Temperature grade 1: –40°C to +125°C
– Device HBM ESD classification 2
– Device CDM ESD classification C5
Wide supply range of:
– 3 V to 36 V (LM2902B-Q1 and LM2902BA-Q1)
– 3 V to 32 V (LM2902KV and LM2902KAV)
– 3 V to 26 V (all other products)
Input offset voltage maximum at 25°C of:
– 2 mV (LM2902BA-Q1 and LM2902KAV)
– 3 mV (LM2902B-Q1)
– 7 mV (all other products)
Internal RF and EMI filter (LM2902B-Q1 and
LM2902BA-Q1)
Supply-current of 175 µA per channel, typical
Unity-gain bandwidth of 1.2 MHz
Common-mode input voltage range includes V–
Differential input voltage range equal to maximumrated supply voltage
Applications include transducer amplifiers, dc
amplification blocks, and all the conventional
operational-amplifier circuits that now can be more
easily implemented in single-supply-voltage systems.
For example, the LM2902 can be operated directly
from the standard 5-V supply that is used in
digital systems and easily provides the required
interface electronics without requiring additional ±15-V
supplies.
2 Applications
•
•
•
•
•
•
•
Device Information
Automotive lighting
Body electronics
Automotive head unit
Telematics control unit
Emergency call (eCall)
Passive safety: brake system
Electric vehicle / hybrid electric:
– Inverter and motor control
– On-board (OBC) and wireless charger
– Battery management system (BMS)
PART NUMBER (1)
LM2902B-Q1(2)
LM2902BA-Q1(2)
LM2902-Q1
(1)
(2)
RG
PACKAGE
BODY SIZE (NOM)
SOIC
8.65 mm × 3.91 mm
TSSOP (14)
5.00 mm × 4.40 mm
SOIC (14)
8.65 mm × 3.91 mm
TSSOP (14)
5.00 mm × 4.40 mm
SOIC (14)
8.65 mm × 3.91 mm
TSSOP (14)
5.00 mm × 4.40 mm
For all available packages, see the orderable addendum at
the end of the data sheet.
This product is preview only.
RF
R1
VOUT
VIN
C1
f-3 dB =
(
RF
VOUT
= 1+
RG
VIN
((
1
1 + sR1C1
1
2pR1C1
(
Single-Pole, Low-Pass Filter
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.
LM2902-Q1, LM2902B-Q1, LM2902BA-Q1
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SGLS178F – AUGUST 2003 – REVISED MAY 2022
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configurations and Functions.................................3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings........................................ 4
6.2 ESD Ratings............................................................... 4
6.3 Recommended Operating Conditions.........................4
6.4 Thermal Information....................................................5
6.5 Electrical Characteristics - LM2902B-Q1 and
LM2902BA-Q1...............................................................6
6.6 Electrical Characteristics: LM2902-Q1,
LM2902KV-Q1, LM2902KAV-Q1................................... 8
6.7 Operating Conditions: LM2902-Q1, LM2902KVQ1, LM2902KAV-Q1......................................................9
7 Parameter Measurement Information.......................... 10
8 Detailed Description...................................................... 11
8.1 Overview................................................................... 11
8.2 Functional Block Diagram......................................... 11
8.3 Feature Description...................................................11
8.4 Device Functional Modes..........................................12
9 Application and Implementation.................................. 13
9.1 Application Information............................................. 13
9.2 Typical Application.................................................... 13
9.3 Design Requirements............................................... 13
9.4 Detailed Design Procedure....................................... 13
9.5 Application Curve......................................................14
10 Power Supply Recommendations..............................15
11 Layout........................................................................... 16
11.1 Layout Guidelines................................................... 16
11.2 Layout Example...................................................... 16
12 Device and Documentation Support..........................17
12.1 Documentation Support.......................................... 17
12.2 Receiving Notification of Documentation Updates..17
12.3 Support Resources................................................. 17
12.4 Trademarks............................................................. 17
12.5 Electrostatic Discharge Caution..............................17
12.6 Glossary..................................................................17
13 Mechanical, Packaging, and Orderable
Information.................................................................... 18
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (April 2008) to Revision F (May 2022)
Page
• Changed the name of the data sheet................................................................................................................. 1
• Revised Features section to include LM2902B-Q1 and LM2902BA-Q1.............................................................1
• Added Applications section ................................................................................................................................1
• Added LM2902B-Q1 and LM2902BA-Q1 to the Device Information table......................................................... 1
• Added LM2902B-Q1 and LM2902BA-Q1 to the Description section..................................................................1
• Updated Pin Configurations and Functions section to include Pin Functions table............................................3
• Added LM2902B-Q1 and LM2902BA-Q1 to the Absolute Maximum Ratings table............................................4
• Added ESD Ratings table with LM2902B-Q1 and LM2902BA-Q1..................................................................... 4
• Added LM2902B-Q1 and LM2902B-Q1 to Recommended Operating Conditions section................................. 4
• Added LM2902B-Q1 and LM2902BA-Q1 to Thermal Information section..........................................................5
• Added Overview section to the data sheet........................................................................................................11
• Added Feature Description section...................................................................................................................11
• Added Input Common Mode Range section to Feature Description section.................................................... 11
• Added Device Functional Modes information for LM2902B-Q1 and LM2902BA-Q1........................................12
• Added Application and Implementation section for LM2902B-Q1 and LM2902BA-Q1.................................... 13
• Added Application Information section for LM2902B-Q1 and LM2902BA-Q1.................................................. 13
• Added Typical Application section for LM2902B-Q1 and LM2902BA-Q1.........................................................13
• Added Power Supply Recommendations section to data sheet....................................................................... 15
• Added Layout section to data sheet................................................................................................................. 16
• Added Device and Documentation Support section to data sheet................................................................... 17
• Added Mechanical, Packaging, and Orderable Information section to data sheet........................................... 18
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SGLS178F – AUGUST 2003 – REVISED MAY 2022
5 Pin Configurations and Functions
OUT1
1
14
OUT4
IN1±
2
13
IN4±
IN1+
3
12
IN4+
V+
4
11
V±
IN2+
5
10
IN3+
IN2±
6
9
IN3±
OUT2
7
8
OUT3
Not to scale
Figure 5-1. D and PW Package
14-Pin SOIC and TSSOP
(Top View)
Table 5-1. Pin Functions
PIN
NAME
NO.
I/O
DESCRIPTION
IN1–
2
I
Inverting input, channel 1
IN1+
3
I
Noninverting input, channel 1
IN2–
6
I
Inverting input, channel 2
IN2+
5
I
Noninverting input, channel 2
IN3–
9
I
Inverting input, channel 3
IN3+
10
I
Noninverting input, channel 3
IN4–
13
I
Inverting input, channel 4
IN4+
12
I
Noninverting input, channel 4
NC
—
—
No internal connection
OUT1
1
O
Output, channel 1
OUT2
7
O
Output, channel 2
OUT3
8
O
Output, channel 3
OUT4
14
O
Output, channel 4
V–
11
—
Negative (lowest) supply or ground (for single-supply operation)
V+
4
—
Positive (highest) supply
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6 Specifications
6.1 Absolute Maximum Ratings
For TA = 25°C (unless otherwise noted)(1)
LM2902B-Q1,
LM2902BA-Q1
LM2902-Q1
LM2902KV-Q1
UNIT
Supply voltage, VCC (2)
40
26
32
V
Differential input voltage, VID (3)
±40
±26
±32
V
Input voltage, VI
–0.3 to 40
–0.3 to 26
–0.3 to 32
V
Duration of output short circuit (one amplifier) to ground at (or below)
TA = 25°C, VCC ≤ 15 V(4)
Unlimited
Unlimited
Unlimited
150
142
142
°C
–65 to 150
–65 to 150
–65 to 150
°C
Operating virtual junction temperature, TJ
Storage temperature range, Tstg
(1)
(2)
(3)
(4)
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 are with respect to network ground terminal GND.
Differential voltages are at IN+ with respect to IN−.
Short circuits from outputs to VCC can cause excessive heating and eventual destruction.
6.2 ESD Ratings
VALUE
UNIT
LM2902B-Q1, LM2902BA-Q1, LM2902KV-Q1, and LM2902KAV-Q1
V(ESD)
Electrostatic discharge
Human-body model (HBM), per AEC Q100-002(1)
±2000
Charged-device model (CDM), per AEC Q100-011
±2000
Charged-device model (CDM), per AEC Q100-011
±1500
V
LM2902-Q1
V(ESD)
(1)
Electrostatic discharge
V
AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
6.3 Recommended Operating Conditions
over operating ambient temperature range (unless otherwise noted)
VS
Supply voltage, VS = ([V+] – [V–])
VCM
Common-mode voltage
TA
Operating ambient temperature
MIN
MAX
LM2902B-Q1, LM2902BA-Q1
3
36
LM2902KV-Q1, LM2902KAV-Q1
3
30
LM2902-Q1
4
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UNIT
V
3
26
V–
(V+) – 2
V
–40
125
°C
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SGLS178F – AUGUST 2003 – REVISED MAY 2022
6.4 Thermal Information
LM2902-Q1, LM2902KV-Q1,
LM2902KAV-Q1
THERMAL METRIC(1)
LM2902B-Q1, LM2902BA-Q1
UNIT
D (SOIC)
PW (TSSOP)
D (SOIC)
PW (TSSOP)
14 PINS
14 PINS
14 PINS
14 PINS
101
86
TBD
TBD
°C/W
RθJA
Junction-to-ambient thermal resistance
RθJC
Junction-to-case (top) thermal resistance
—
—
TBD
TBD
°C/W
RθJB
Junction-to-board thermal resistance
—
—
TBD
TBD
°C/W
ψJT
Junction-to-top characterization parameter
—
—
TBD
TBD
°C/W
ψJB
Junction-to-board characterization
parameter
—
—
TBD
TBD
°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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6.5 Electrical Characteristics - LM2902B-Q1 and LM2902BA-Q1
For VS = (V+) – (V–) = 5 V to 36 V (±2.5 V to ±18 V), at TA = 25°C, VCM = VOUT = VS / 2, and RL = 10k connected to VS / 2
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
±0.3
±3.0
UNIT
OFFSET VOLTAGE
LM2902B-Q1
VOS
TA = –40°C to 125°C
Input offset voltage
LM2902BA-Q1
dVOS/dT
Input offset voltage drift
PSRR
Input offset voltage versus
power supply
Channel separation
±4.0
±0.3
TA = –40°C to 125°C
RS = 0 Ω
±2
mV
2.5
TA = –40°C to 125°C
65
f = 1 kHz to 20 kHz
±7
μV/°C
100
dB
120
dB
INPUT VOLTAGE RANGE
VCM
Common-mode voltage
range
VS = 3 V to 36 V
CMRR
Common-mode rejection
ratio
(V–) ≤ VCM ≤ (V+) – 1.5 V
VS = 3 V to 36 V
(V–) ≤ VCM ≤ (V+) – 2 V
VS = 5 V to 36 V
VS = 5 V to 36 V
TA = –40°C to 125°C
TA = –40°C to 125°C
V–
(V+) – 1.5
V–
(V+) – 2
70
80
65
80
V
dB
INPUT BIAS CURRENT
IB
Input bias current
dIOS/dT
Input offset current drift
IOS
Input offset current
dIOS/dT
Input offset current drift
-10
TA = –40°C to 125°C
-35
-50
TA = –40°C to 125°C
10
±0.5
TA = –40°C to 125°C
pA/°C
±4
±5
TA = –40°C to 125°C
nA
10
nA
pA/°C
NOISE
EN
Input voltage noise
f = 0.1 to 10 Hz
eN
Input voltage noise density
RS = 100 Ω, VI = 0 V, f = 1 kHz (see Figure 8)
3
μVPP
35
nV/√Hz
10 || 0.1
MΩ || pF
4 || 1.5
GΩ || pF
INPUT IMPEDANCE
ZID
Differential
ZICM
Common-mode
OPEN-LOOP GAIN
AOL
Open-loop voltage gain
VS = 15 V, VO = 1 V to 11 V, RL ≥ 2 kΩ, connected to
(V-)
50
TA = –40°C to 125°C
100
V/mV
25
FREQUENCY RESPONSE
GBW
Gain-bandwidth product
RL = 1 MΩ, CL = 20 pF (see Figure 7)
1.2
MHz
SR
Slew rate
RL = 1 MΩ, CL = 30 pF, VI = ±10 V (see Figure 7)
0.5
V/μs
Θm
Phase margin
G = + 1, RL = 10kΩ, CL = 20 pF
56
°
tS
Settling time
To 0.1%, VS = 5 V, 2-V Step , G = +1, CL = 100 pF
4
μs
Overload recovery time
VIN × gain > VS
10
μs
Total harmonic distortion +
noise
G = + 1, f = 1 kHz, VO = 3.53 VRMS, VS = 36V, RL = 100k, IOUT ≤ 50µA, BW = 80 kHz
THD+N
0.001%
OUTPUT
VO
VO
VO
VO
Positive Rail (V+)
Voltage output swing from
rail
VO
Negative Rail (V-)
VS = 5 V, RL ≤ 10 kΩ
connected to (V–)
VO
VS = 15 V; VO = V-; VID = 1 V
IO
Output current
VS = 15 V; VO = V+; VID = -1
V
Source
Sink
IOUT = -50 µA
1.35
1.5
V
IOUT = -1 mA
1.4
1.6
V
IOUT = -5 mA
1.5
1.75
V
IOUT = 50 µA
100
150
mV
IOUT = 1 mA
0.75
1
V
5
20
mV
TA = –40°C to 125°C
-20
TA = –40°C to 125°C
10
TA = –40°C to 125°C
6
Short-circuit current
CLOAD
Capacitive load drive
50
VS = 20 V, (V+) = 10 V, (V-) = -10 V, VO = 0 V
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mA
mA
20
mA
5
VID = -1 V; VO = (V-) + 200 mV
ISC
-30
-10
mA
85
±40
100
μA
±60
mA
pF
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6.5 Electrical Characteristics - LM2902B-Q1 and LM2902BA-Q1 (continued)
For VS = (V+) – (V–) = 5 V to 36 V (±2.5 V to ±18 V), at TA = 25°C, VCM = VOUT = VS / 2, and RL = 10k connected to VS / 2
(unless otherwise noted)
PARAMETER
RO
Open-loop output
impedance
TEST CONDITIONS
MIN
f = 1 MHz, IO = 0 A
TYP
MAX
300
UNIT
Ω
POWER SUPPLY
IQ
Quiescent current per
amplifier
VS = 5 V; IO = 0 A
TA = –40°C to 125°C
175
300
μA
VS = 36 V; IO = 0 A
TA = –40°C to 125°C
350
750
μA
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6.6 Electrical Characteristics: LM2902-Q1, LM2902KV-Q1, LM2902KAV-Q1
For VS = (V+) – (V–) = 5 V, at TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VIO
Input offset voltage
VCC = 5 V to 26 V, VIC = VICRmin,
VO = 1.4 V
IIO
Input offset current
VO = 1.4 V
IIB
Input bias current
VO = 1.4 V
VICR
Common-mode input voltage
range
VCC = 5 V to 26 V
VOH
High-level output voltage
Low-level output voltage
f = 1 kHz to 20 kHz
VCC = 15 V, VO = 15 V VID = −1 V,
25°C
50
80
dB
25°C
50
100
dB
120
25°C
–20
Full Range
–10
25°C
10
Full Range
5
–30
dB
–60
mA
20
VO = 0
25°C
±40
±60
VO = 2.5 V
No load
Full Range
0.7
1.2
No load
Full Range
1.4
3
3
7
∆VIO/∆T
Temperature drift
RS = 0 Ω
IIO
Input offset current
VO = 1.4 V
∆IIO/∆T
Temperature drift
IIB
Input bias current
VO = 1.4 V
VICR
Common-mode input voltage
range
VCC = 5 V to 32 V
A-suffix
devices
25°C
Full Range
1
Full Range
2
mA
mA
mV
4
Full Range
7
25°C
2
Full Range
µV/°C
50
150
Full Range
10
25°C
–20
Full Range
0 to VCC– 1.5
Full Range
0 to VCC – 2
nA
pA/°C
–250
–500
25°C
25°C
µA
10
25°C
nA
V
VCC – 1.5
VCC = 32 V
RL = 2 kΩ
Full Range
26
VCC = 32 V
RL ≥ 10 kΩ
Full Range
27
RL ≤ 10 kΩ
mV
V/mV
VCC at 5 V,
GND at −5 V
Input offset voltage
V
15
30
Non-A devices
nA
Full Range
25°C
VIO
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20
100
VO = 200 mV
VCC = 5 V to 32 V,
VIC = VICRmin
VO = 1.4 V
nA
V
VID = −1 V
Supply current (four amplifiers) VCC = 26 V,
VO = 0.5 VCC
mV
24
5
25°C
25°C
VID = 1 V,
UNIT
(V+) – 1.5
Full Range
RL = 10 kΩ
8
(V+) - 2
23
ICC
Low-level output voltage
(V+) - 1.5
V22
Short-circuit output current
VOL
V-
Full Range
IOS
High-level output voltage
25°C
RL ≥ 10 kΩ
Supply-voltage rejection ratio
(∆VCC /∆VIO)
–250
–500
VCC = 26 V
kSVR
VOH
–20
Full Range
25°C
VIC = VICRmin
50
300
Full Range
Common-mode rejection ratio
Output current
2
RL = 2 kΩ
CMRR
7
10
25°C
Large-signal differential voltage
VCC= 15 V, VO= 1 V to 11 V, RL ≥ 2 kΩ
amplification
MAX
3
Full Range
AVD
IO
25°C
Full Range
VCC = 26 V,
VCC = 15 V, VO = 0
TYP(2)
25°C
RL ≤ 10 kΩ
VO1/ VO2 Crosstalk attenuation
MIN
Full Range
RL = 10 kΩ
VOL
TA(1)
Full Range
V
5
20
mV
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6.6 Electrical Characteristics: LM2902-Q1, LM2902KV-Q1, LM2902KAV-Q1 (continued)
For VS = (V+) – (V–) = 5 V, at TA = 25°C (unless otherwise noted)
TEST CONDITIONS
TA(1)
MIN
TYP(2)
Large-signal differential voltage VCC = 15 V, VO = 1 V to 11 V,
amplification
RL ≥ 2 kΩ
25°C
25
100
Full Range
15
PARAMETER
AVD
Amplifier-to-amplifier
coupling(3)
f = 1 kHz to 20 kHz,
input referred
25°C
CMRR
Common-mode rejection ratio
VIC = VICRmin
25°C
kSVR
Supply-voltage rejection ratio
(∆VCC /∆VIO)
25°C
VO1/ VO2 Crosstalk attenuation
f = 1 kHz to 20 kHz
VCC = 15, VO = 0
IO
Output current
dB
60
80
dB
60
100
dB
120
25°C
–20
Full Range
–10
25°C
10
dB
–30
–60
mA
20
VID = −1 V
Full Range
5
VID = −1 V
VO = 200 mV
25°C
12
VCC at 5 V,
GND at −5 V
VO = 0
25°C
±40
±60
VO = 2.5 V
No load
Full Range
0.7
1.2
No load
Full Range
1.4
3
Short-circuit output current
ICC
Supply current (four amplifiers) VCC = 32 V,
VO = 0.5 VCC
(1)
(2)
(3)
V/mV
VCC = 15, VO = 15 V
IOS
UNIT
120
25°C
VID = 1 V
MAX
40
µA
mA
mA
Full range is −40°C to 125°C.
All typical values are at TA = 25°C
Due to proximity of external components, ensure that coupling is not originating via stray capacitance between these external parts.
Typically, this can be detected, as this type of coupling increases at higher frequencies.
6.7 Operating Conditions: LM2902-Q1, LM2902KV-Q1, LM2902KAV-Q1
For VS = (V+) – (V–) = 15 V, at TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
SR
Slew rate at unity gain
RL = 1 MΩ, CL = 30 pF, VI = ±10 V (see Figure 7-1)
0.5
V/µs
B1
Unity-gain bandwidth
RL = 1 MΩ, CL = 20 pF (see Figure 7-1)
1.2
MHz
VN
Equivalent input noise voltage
RS = 100 Ω, VI = 0 V, f = 1 kHz (see Figure 7-2)
35
nV/√Hz
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7 Parameter Measurement Information
Figure 7-1. Unity-Gain Amplifier
Figure 7-2. Noise-Test Circuit
10
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8 Detailed Description
8.1 Overview
The LM2902-Q1, LM2902B-Q1, and LM2902BA-Q1 devices consist of four independent, high-gain frequencycompensated operational amplifiers designed to operate from a single supply over a wide range of voltages.
Operation from split supplies also is possible if the difference between the two supplies is within the supply
voltage range, and VS is at least 1.5 V more positive than the input common-mode voltage. The low supplycurrent drain is independent of the magnitude of the supply voltage.
Applications include transducer amplifiers, DC amplification blocks, and all the conventional operational amplifier
circuits that now can be implemented more easily in single-supply-voltage systems. For example, these devices
can be operated directly from the standard 5-V supply used in digital systems and easily can provide the
required interface electronics without additional ±5-V supplies.
8.2 Functional Block Diagram
Schematic (Each Amplifier)
8.3 Feature Description
8.3.1 Input Common Mode Range
The valid common mode range is from device ground to VS – 1.5 V (VS – 2 V across temperature). Inputs
may exceed VS up to the maximum VS without device damage. At least one input must be in the valid input
common-mode range for the output to be the correct phase. If both inputs exceed the valid range, then the
output phase is undefined. If either input more than 0.3 V below V– then input current should be limited to 1 mA
and the output phase is undefined.
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8.4 Device Functional Modes
The LM2902-Q1, LM2902B-Q1, and LM2902BA-Q1 devices are powered on when the supply is connected.
This device can be operated as a single-supply operational amplifier or dual-supply amplifier, depending on the
application.
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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, as well as validating and testing their design
implementation to confirm system functionality.
9.1 Application Information
The LM2902-Q1, LM2902B-Q1, LM2902BA-Q1 operational amplifiers are useful in a wide range of signal
conditioning applications. Inputs can be powered before VS for flexibility in multiple supply circuits. For full
application design guidelines related to this family of devices, please refer to the application report Application
design guidelines for LM324/LM358 devices.
9.2 Typical Application
A typical application for an operational amplifier is an inverting amplifier. This amplifier takes a positive voltage
on the input, and makes it a negative voltage of the same magnitude. In the same manner, it also makes
negative voltages positive.
RF
RI
Vsup+
VOUT
VIN
+
Vsup-
Figure 9-1. Application Schematic
9.3 Design Requirements
The supply voltage must be chosen such that it is larger than the input voltage range and output range. For
instance, this application scales a signal of ±0.5 V to ±1.8 V. Setting the supply at ±12 V is sufficient to
accommodate this application.
9.4 Detailed Design Procedure
Determine the gain required by the inverting amplifier using Equation 1 and Equation 2:
AV
VOUT
VIN
AV
1.8
0.5
(1)
3.6
(2)
Once the desired gain is determined, choose a value for RI or RF. Choosing a value in the kilohm range is
desirable because the amplifier circuit uses currents in the milliampere range. This ensures the part does not
draw too much current. This example uses 10 kΩ for RI which means 36 kΩ is used for RF. This was determined
by Equation 3.
AV
RF
RI
(3)
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9.5 Application Curve
2
VIN
1.5
VOUT
1
Volts
0.5
0
-0.5
-1
-1.5
-2
0
0.5
1
Time (ms)
1.5
2
Figure 9-2. Input and Output Voltages of the Inverting Amplifier
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10 Power Supply Recommendations
CAUTION
Supply voltages larger than specified in the recommended operating region can permanently
damage the device (see Section 6.1).
Place 0.1-µF bypass capacitors close to the power-supply pins to reduce errors coupling in from noisy or
high-impedance power supplies. For more detailed information on bypass capacitor placement, see Section 11.
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11 Layout
11.1 Layout Guidelines
For best operational performance of the device, use good PCB layout practices, including:
•
•
•
•
•
•
Noise can propagate into analog circuitry through the power pins of the circuit as a whole, as well as the
operational amplifier. Bypass capacitors are used to reduce the coupled noise by providing low-impedance
power sources local to the analog circuitry.
– Connect low-ESR, 0.1-µF ceramic bypass capacitors between each supply pin and ground, placed as
close to the device as possible. A single bypass capacitor from V+ to ground is applicable for singlesupply applications.
Separate grounding for analog and digital portions of circuitry is one of the simplest and most-effective
methods of noise suppression. One or more layers on multilayer PCBs are usually devoted to ground planes.
A ground plane helps distribute heat and reduces EMI noise pickup. Make sure to physically separate digital
and analog grounds, paying attention to the flow of the ground current.
To reduce parasitic coupling, run the input traces as far away from the supply or output traces as possible. If it
is not possible to keep them separate, it is much better to cross the sensitive trace perpendicular as opposed
to in parallel with the noisy trace.
Place the external components as close to the device as possible. Keeping RF and RG close to the inverting
input minimizes parasitic capacitance, as shown in Section 11.2.
Keep the length of input traces as short as possible. Always remember that the input traces are the most
sensitive part of the circuit.
Consider a driven, low-impedance guard ring around the critical traces. A guard ring can significantly reduce
leakage currents from nearby traces that are at different potentials.
11.2 Layout Example
Place components close to
device and to each other to
reduce parasitic errors
Run the input traces as far
away from the supply lines
as possible
VS+
RF
OUT1
V+
GND
IN1í
OUT2
VIN
IN1+
IN2í
Ví
IN2+
RG
GND
R IN
Only needed for
dual-supply
operation
GND
Use low-ESR, ceramic
bypass capacitor
VSí
(or GND for single supply)
Ground (GND) plane on another layer
Figure 11-1. Operational Amplifier Board Layout for Noninverting Configuration
RIN
VIN
+
VOUT
RG
RF
Figure 11-2. Operational Amplifier Schematic for Noninverting Configuration
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12 Device and Documentation Support
12.1 Documentation Support
12.1.1 Related Documentation
For related documentation, see the following:
•
Texas Instruments, Application Design Guidelines for LM324/LM358 Devices application note
12.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. Click on
Subscribe to updates 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.
12.3 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.
12.4 Trademarks
TI E2E™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
12.5 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.
12.6 Glossary
TI Glossary
This glossary lists and explains terms, acronyms, and definitions.
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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.
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PACKAGE OPTION ADDENDUM
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3-Jun-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)
LM2902KAVQDRQ1
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902KAQ
Samples
LM2902KAVQPWRG4Q1
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902KAQ
Samples
LM2902KAVQPWRQ1
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902KAQ
Samples
LM2902KVQDRQ1
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902KVQ
Samples
LM2902KVQPWRG4Q1
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902KVQ
Samples
LM2902KVQPWRQ1
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902KVQ
Samples
LM2902QDRG4Q1
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902Q1
Samples
LM2902QDRQ1
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902Q1
Samples
LM2902QPWRG4Q1
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902Q1
Samples
LM2902QPWRQ1
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
2902Q1
Samples
PLM2902BQPWRQ1
ACTIVE
TSSOP
PW
14
3000
TBD
Call TI
Call TI
-40 to 125
(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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