LM7341
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SNOSAW9B – MAY 2008 – REVISED MARCH 2013
LM7341 Rail-to-Rail Input/Output ±15V, 4.6 MHz GBW, Operational Amplifier in SOT-23
Package
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FEATURES
DESCRIPTION
•
•
•
The LM7341 is a rail-to-rail input and output amplifier
in a small SOT-23 package with a wide supply
voltage and temperature range. The LM7341 has a
4.6 MHz gain bandwidth and a 1.9 volt per
microsecond slew rate, and draws 0.75 mA of supply
current at no load.
1
2
•
•
•
•
•
•
•
•
•
•
(VS = ±15V, TA = 25°C, Typical Values.)
Tiny 5-pin SOT-23 Package Saves Space
Greater than Rail-to-Rail Input CMVR −15.3V to
15.3V
Rail-to-Rail Output Swing −14.84V to 14.86V
Supply Current 0.7 mA
Gain Bandwidth 4.6 MHz
Slew Rate 1.9 V/µs
Wide Supply Range 2.7V to 32V
High Power Supply Rejection Ratio 106 dB
High Common Mode Rejection Ratio 115 dB
Excellent Gain 106 dB
Temperature Range −40°C to 125°C
Tested at −40°C, 125°C and 25°C at 2.7V, ±5V
and ±15V
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
•
Automotive
Industrial Robotics
Sensor Output Buffers
Multiple Voltage Power Supplies
Reverse Biasing of Photodiodes
Low Current Optocouplers
High Side Sensing
Comparator
Battery Chargers
Test Point Output Buffers
Below Ground Current Sensing
The LM7341 is tested at −40°C, 125°C and 25°C with
modern
automatic
test
equipment.
Detailed
performance specifications at 2.7V, ±5V, and ±15V
and over a wide temperature range make the
LM7341 a good choice for automotive, industrial, and
other demanding applications.
Greater than rail-to-rail input common mode range
with a minimum 76 dB of common mode rejection at
±15V makes the LM7341 a good choice for both high
and low side sensing applications.
LM7341 performance is consistent over a wide
voltage range, making the part useful for applications
where the supply voltage can change, such as
automotive electrical systems and battery powered
electronics.
The LM7341 uses a small SOT23-5 package, which
takes up little board space, and can be placed near
signal sources to reduce noise pickup.
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2013, Texas Instruments Incorporated
LM7341
SNOSAW9B – MAY 2008 – REVISED MARCH 2013
www.ti.com
Typical Performance Characteristics
CL = 20 pF
100
PHASE
GAIN (dB)
80
±15V
40
VS = ±15V
135
100
90
80
±5V
±1.35V
GAIN
45
RL = 1 M: 135
120
113
68
60
158
140
CL = 20 pF
PHASE
113
90
-40°C
68
60
40
25°C
GAIN
45
±15V
PHASE (°)
120
158
GAIN (dB)
RL = 1 M:
PHASE (°)
140
125°C
23
20
0
0
23
20
±5V
0
125°C, 25°C, -40°C
0
±1.35V
-20
1k
100k
10k
1M
10M
-23
100M
-20
1k
10k
100k
1M
10M
-23
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 1. Open Loop Frequency Response
Figure 2. Open Loop Frequency Response
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.
Absolute Maximum Ratings (1) (2)
ESD Tolerance (3)
Human Body Model
2000V
Machine Model
200V
Charge-Device Model
1000V
VIN Differential
±15V
(V+) + 0.3V, (V−) −0.3V
Voltage at Input/Output Pin
Supply Voltage (VS = V+ − V−)
35V
Input Current
±10 mA
Output Current (4)
±20 mA
Power Supply Current
25 mA
Soldering Information
Infrared or Convection (20 sec)
Wave Soldering Lead Temp. (10 sec.)
Junction Temperature (5)
(2)
(3)
(4)
(5)
260°C
−65°C to 150°C
Storage Temperature Range
(1)
235°C
150°C
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications.
Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of
JEDEC) Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).
Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in
exceeding the maximum allowed junction temperature of 150°C.
The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) − TA)/θJA. All numbers apply for packages soldered directly unto a PC board.
Operating Ratings (1)
Supply Voltage (VS = V+ − V−)
2.5V to 32V
Temperature Range (2)
Package Thermal Resistance (θJA)
(1)
(2)
2
−40°C to 125°C
5-Pin SOT-23
325°C/W
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) − TA)/θJA. All numbers apply for packages soldered directly unto a PC board.
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SNOSAW9B – MAY 2008 – REVISED MARCH 2013
2.7V Electrical Characteristics
Unless otherwise specified, all limits ensured for TA = 25°C, V+ = 2.7V, V− = 0V, VCM = 0.5V, VOUT = 1.35V and RL > 1 MΩ to
1.35V. Boldface limits apply at the temperature extremes
Symbol
Parameter
VOS
Input Offset Voltage
TCVOS
Input Offset Voltage Temperature Drift
IB
Input Bias Current
Conditions
VCM = 0.5V and VCM = 2.2V
Min (1)
Typ (2)
Max (1)
Units
−4
−5
±0.2
+4
+5
mV
−180
−200
−90
μV/°C
±2
VCM = 0.5V
VCM = 2.2V
30
60
70
1
40
50
IOS
Input Offset Current
VCM = 0.5V and VCM = 2.2V
CMRR
Common Mode Rejection Ratio
0V ≤ VCM ≤ 1.0V
82
80
106
0V ≤ VCM ≤ 2.7V
62
60
80
86
84
106
PSRR
Power Supply Rejection Ratio
2.7V ≤ VS ≤ 30V
VCM = 0.5V
CMVR
Common Mode Voltage Range
CMRR > 60 dB
−0.3
2.7
3.0
12
8
65
dB
0.0
Open Loop Voltage Gain
0.5V ≤ VO ≤ 2.2V
RL = 10 kΩ to 1.35V
VOUT
Output Voltage Swing
High
RL = 10 kΩ to 1.35V
VID = 100 mV
50
120
150
RL = 2 kΩ to 1.35V
VID = 100 mV
95
150
200
RL = 10 kΩ to 1.35V
VID = −100 mV
55
120
150
RL = 2 kΩ to 1.35V
VID = −100 mV
100
150
200
IOUT
Output Current
Sourcing, VOUT = 0V
VID = 200 mV
6
4
12
Sinking, VOUT = 0V
VID = −200 mV
5
3
10
nA
dB
AVOL
Output Voltage Swing
Low
nA
V
V/mV
mV from
either rail
mA
IS
Supply Current
VCM = 0.5V and VCM = 2.2V
0.6
0.9
1.0
SR
Slew Rate
±1V Step
1.5
GBW
Gain Bandwidth
f = 100 kHz, RL = 100 kΩ
3.6
MHz
en
Input Referred Voltage Noise Density
f = 1 kHz
35
nV/√Hz
in
Input Referred Voltage Noise Density
f = 1 kHz
0.28
pA/√Hz
THD+N
Total Harmonic Distortion + Noise
f = 10 kHz
−66
dB
tPD
Propagation Delay
Overdrive = 50 mV (3)
4
Overdrive = 1V (3)
3
mA
V/μs
µs
tr
Rise Time
20% to 80% (3)
1
µs
tf
Fall Time
80% to 20% (3)
1
µs
(1)
(2)
(3)
All limits are specified by testing or statistical analysis.
Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
The maximum differential voltage between the input pins is VIN Differential = ±15V.
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±5V Electrical Characteristics
Unless otherwise specified, all limits ensured for TA = 25°C, V+ = +5V, V− = −5V, VCM = VOUT = 0V and RL > 1 MΩ to 0V.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
VOS
Input Offset Voltage
TCVOS
Input Offset Voltage Temperature Drift
IB
Input Bias Current
Conditions
VCM = −4.5V and VCM = 4.5V
Min (1)
Typ (2)
−4
−5
±0.2
−200
−250
−95
Max (1)
+4
+5
VCM = 4.5V
35
70
80
1
40
50
IOS
Input Offset Current
VCM = −4.5V and VCM = 4.5V
CMRR
Common Mode Rejection Ratio
−5V ≤ VCM ≤ 3V
84
82
112
−5V ≤ VCM ≤ 5V
72
70
92
86
84
106
PSRR
Power Supply Rejection Ratio
2.7V ≤ VS ≤ 30V, VCM = −4.5V
CMVR
Common Mode Voltage Range
CMRR ≥ 65 dB
−5.3
5.0
5.3
20
12
110
−5.0
−4V ≤ VO ≤ 4V
RL = 10 kΩ to 0V
VOUT
Output Voltage Swing
High
RL = 10 kΩ to 0V,
VID = 100 mV
80
150
200
RL = 2 kΩ to 0V,
VID = 100 mV
170
300
400
RL = 10 kΩ to 0V
VID = −100 mV
90
150
200
RL = 2 kΩ to 0V
VID = −100 mV
210
300
400
Output Current
Sourcing, VOUT = −5V
VID = 200 mV
6
4
11
Sinking, VOUT = 5V
VID = −200 mV
6
4
12
nA
dB
Open Loop Voltage Gain
IOUT
nA
dB
AVOL
Output Voltage Swing
Low
mV
μV/°C
±2
VCM = −4.5V
Units
V
V/mV
mV from
either rail
mA
IS
Supply Current
VCM = −4.5V and VCM = 4.5V
0.65
SR
Slew Rate
±4V Step
1.7
GBW
Gain Bandwidth
f = 100 kHz, RL = 100 kΩ
4.0
MHz
en
Input Referred Voltage Noise Density
f = 1 kHz
33
nV/√Hz
in
Input Referred Voltage Noise Density
f = 1 kHz
0.26
pA/√Hz
THD+N
Total Harmonic Distortion + Noise
f = 10 kHz
−66
dB
tPD
Propagation Delay
Overdrive = 50 mV (3)
8
Overdrive = 1V (3)
6
1.0
1.1
mA
V/μs
µs
tr
Rise Time
20% to 80% (3)
5
µs
tf
Fall Time
80% to 20% (3)
5
µs
(1)
(2)
(3)
4
All limits are specified by testing or statistical analysis.
Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
The maximum differential voltage between the input pins is VIN Differential = ±15V.
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±15V Electrical Characteristics
Unless otherwise specified, all limits ensured for TA = 25°C, V+ = 15V, V− = −15V, VCM = VOUT = 0V and RL > 1 MΩ to 0V.
Boldface limits apply at the temperature extremes
Symbol
Conditions
Min (1)
Typ (2)
Max (1)
Units
VCM = −14.5V and VCM = 14.5V
−4
−5
±0.2
+4
+5
mV
−250
−300
−110
Parameter
VOS
Input Offset Voltage
TCVOS
Input Offset Voltage Temperature Drift
IB
Input Bias Current
μV/°C
±2
VCM = −14.5V
VCM = 14.5V
40
80
90
1
40
50
IOS
Input Offset Current
VCM = −14.5V and VCM = 14.5V
CMRR
Common Mode Rejection Ratio
−15V ≤ VCM ≤12V
84
82
115
−15V ≤ VCM ≤ 15V
78
76
100
86
84
106
PSRR
Power Supply Rejection Ratio
2.7V ≤ VS ≤ 30V, VCM = −14.5V
CMVR
Common Mode Voltage Range
CMRR > 80 dB
−15.3
15.0
15.3
25
15
200
nA
dB
dB
−15.0
AVOL
Open Loop Voltage Gain
−13V ≤ VO ≤ 13V
RL = 10 kΩ to 0V
VOUT
Output Voltage Swing
High
RL = 10 kΩ to 0V
VID = 100 mV
135
300
400
Output Voltage Swing
Low
RL = 10 kΩ to 0V
VID = −100 mV
160
300
400
Output Current (3)
Sourcing, VOUT = −15V
VID = 200 mV
5
3
10
Sinking, VOUT = 15V
VID = −200 mV
8
5
13
IOUT
nA
V
V/mV
mV from
either rail
mA
IS
Supply Current
VCM = −14.5V and VCM = 14.5V
0.7
SR
Slew Rate
±12V Step
1.9
GBW
Gain Bandwidth
f = 100 kHz, RL = 100 kΩ
4.6
MHz
en
Input Referred Voltage Noise Density
f = 1 kHz
31
nV/√Hz
in
Input Referred Voltage Noise Density
f = 1 kHz
0.27
pA/√Hz
THD+N
Total Harmonic Distortion + Noise
f = 10 kHz
−65
dB
tPD
Propagation Delay
Overdrive = 50 mV (4)
17
Overdrive = 1V (4)
12
20% to 80% (4)
13
µs
(4)
13
µs
tr
tf
(1)
(2)
(3)
(4)
Rise Time
Fall Time
80% to 20%
1.2
1.3
mA
V/μs
µs
All limits are specified by testing or statistical analysis.
Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) − TA)/θJA. All numbers apply for packages soldered directly unto a PC board.
The maximum differential voltage between the input pins is VIN Differential = ±15V.
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Connection Diagram
5-Pin SOT-23
Figure 3. Top View
6
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Typical Performance Characteristics
Output Swing vs. Sourcing Current
Output Swing vs. Sinking Current
10
10
VS = 2.5V
VOUT FROM V (V)
VOUT FROM V+ (V)
VS = 2.5V
1
125°C
85°C
25°C
0.1
1
125°C
85°C
25°C
0.1
-40°C
0.01
0.01
0.1
1
-40°C
10
0.01
0.01
100
0.1
1
Figure 4.
Output Swing vs. Sourcing Current
Output Swing vs. Sinking Current
10
VS = ±5V
+
1
VOUT FROM V (V)
VS = ±5V
VOUT FROM V (V)
100
Figure 5.
10
125°C
85°C
25°C
0.1
-40°C
0.01
0.1
1
10
1
125°C
85°C
25°C
0.1
-40°C
0.01
0.1
100
1
10
ISOURCE (mA)
ISOURCE (mA)
Figure 6.
Figure 7.
Output Swing vs. Sourcing Current
100
Output Swing vs. Sinking Current
10
10
VS = ±15V
VOUT FROM V (V)
VS = ±15V
VOUT FROM V (V)
10
ISINK (mA)
ISOURCE (mA)
1
125°C
85°C
25°C
0.1
1
125°C
85°C
25°C
0.1
-40°C
0.01
0.01
0.1
1
-40°C
10
100
ISOURCE (mA)
0.01
0.01
0.1
1
10
100
ISINK (mA)
Figure 8.
Figure 9.
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Typical Performance Characteristics (continued)
VOS Distribution
VOS vs. VCM (Unit 1)
16
0.5
0.4
12
0.3
VS = ±2.5V
125°C
85°C
0.2
10
VOS (mV)
PERCENTAGE (%)
VS = ±5V
14
8
6
0.1
25°C
0
-40°C
-0.1
4
-0.2
2
-0.3
0
-3
-2
-1
1
0
2
-0.4
3
-1
0
1
VOS (mV)
Figure 10.
VOS vs. VCM (Unit 2)
VOS vs. VCM (Unit 3)
VS = 2.5V
-40°C
0.9
0.8
0.5
-40°C
0.8
125°C
25°C
0.6
VOS (mV)
VOS (mV)
0.7
85°C
0.4
25°C
0.7
0.6
0.3
0.2
85°C
0.5
VS = ±2.5V
125°C
0.4
0
1
2
3
4
-1
0
1
VCM (V)
3
4
Figure 13.
VOS vs. VCM (Unit 1)
VOS vs. VCM (Unit 2)
0.5
1
VS = ±5V
VS = ±5V
0.9
-40°C
0.3
0.8
0.2
VOS (mV)
VOS (mV)
2
VCM (V)
Figure 12.
0.4
4
1
0.9
0
-1
3
Figure 11.
1
0.1
2
VCM (V)
0.1
0
125°C
0.7
25°C
0.6
85°C
-0.1
-0.3
-6
0.4
25°C
-0.2
-40°C
-4
85°C
0.4
-2
0
2
4
6
-6
-4
-2
0
2
4
6
VCM (V)
VCM (V)
Figure 14.
8
125°C
Figure 15.
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Typical Performance Characteristics (continued)
VOS vs. VCM (Unit 3)
VOS vs. VCM (Unit 1)
0.9
1
VS = ±5V
VS = ±15V
0.85
0.9
-40°C
0.8
-40°C
0.8
0.75
VOS (mV)
VOS (mV)
25°C
0.7
85°C
0.65
0.7
25°C
0.6
85°C
0.6
125°C
0.5
-6
-4
-2
2
0
125°C
0.5
0.55
4
0.4
-20 -15 -10
6
-5
0
2
VCM (V)
VCM (V)
Figure 16.
Figure 17.
VOS vs. VCM (Unit 2)
10
15
20
15
20
VOS vs. VCM (Unit 3)
0.6
0.9
VS = ±15V
0.5
0.85
0.4
25°C
0.8
VOS (mV)
0.3
VOS (mV)
-40°C
0.2
0.1
125°C
85°C
0
-0.1
0.75
0.7
85°C
0.65
125°C
0.6
25°C
0.55
-0.2
-40°C
-0.3
-20 -15 -10
-5
0
5
10
15
VS = ±15V
0.5
-20 -15 -10
20
5
VCM (V)
VCM (V)
Figure 19.
10
VOS vs. VS (Unit 2)
0.9
-
-
VCM = V +0.5V
VCM = V +0.5V
-40°C
0.8
0
125°C
85°C
0.7
-0.1
VOS (mV)
VOS (mV)
0
Figure 18.
VOS vs. VS (Unit 1)
0.1
-5
25°C
-0.2
-40°C
25°C
0.6
85°C
0.5
125°C
0.3
0.4
-0.4
0.3
0
5
10
15
20
25
30
35
40
VS (V)
0
5
10
15
20
25
30
35
40
VS (V)
Figure 20.
Figure 21.
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Typical Performance Characteristics (continued)
VOS vs. VS (Unit 3)
0.9
VOS vs. VS (Unit 1)
0.6
-
-40°C
VCM = V +0.5V
0.5
125°C
0.8
0.4
0.7
VOS (mV)
VOS (mV)
25°C
85°C
0.6
85°C
0.3
0.2
25°C
125°C
0.1
-40°C
0.5
0
+
VCM = V -0.5V
0.4
-0.1
0
5
10
15
20
25
30
35
40
5
0
10
15
VS (V)
20
25
30
35
40
VS (V)
Figure 22.
Figure 23.
VOS vs. VS (Unit 2)
VOS vs. VS (Unit 3)
1.0
0.8
+
+
VCM = V -0.5V
VCM = V -0.5V
-40°C
0.9
0.7
VOS (mV)
VOS (mV)
-40°C
0.8
125°C
25°C
0.7
0.6
125°C
85°C
0.5
85°C
0.6
25°C
0.4
0.5
0
5
10
15
20
25
30
35
40
5
0
10
15
20
VS (V)
30
35
40
VS (V)
Figure 24.
Figure 25.
IBIAS vs. VCM
IBIAS vs. VCM
40
60
VS = 2.5V
40
20
-40°C
VS = ±5V
20
0
0
125°C
IBIAS (nA)
25°C
IBIAS (nA)
25
-20
85°C
-40
-20
-40
-60
-60
85°C
125°C
-80
-80
-100
25°C
-100
10
0
1
2
3
-40°C
-120
-5
-4
-3
-2
-1
0
1
VCM (V)
VCM (V)
Figure 26.
Figure 27.
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Typical Performance Characteristics (continued)
IBIAS vs. VCM
IBIAS vs. VS
60
-70
-
VS = ±15V
40
VCM = V +0.5V
-80
20
125°C
85°C
-90
IBIAS (nA)
IBIAS (nA)
0
-20
-40
-60
-100
-40°C
85°C
125°C
-80
25°C
-110
-100
-40°C
25°C
-120
-15
-120
-5
-10
0
5
10
15
0
5
10
15
20
VCM (V)
25
30
35
40
VS (V)
Figure 28.
Figure 29.
IBIAS vs. VS
IS vs. VCM
50
0.75
+
VCM = V -0.5V
VS = 2.5V
-40°C
45
0.7
25°C
35
0.65
IS (mA)
IBIAS (nA)
40
85°C
-40°C
25°C
0.6
85°C
30
125°C
25
0.55
125°C
20
0
5
10
15
20
25
30
35
0.5
-1
40
0
1
VS (V)
4
Figure 31.
IS vs. VCM
IS vs. VCM
0.75
0.85
0.8
-40°C
-40°C
25°C
0.75
25°C
0.65
IS (mA)
IS (mA)
3
VCM (V)
Figure 30.
0.7
2
85°C
0.6
125°C
85°C
0.7
125°C
0.65
0.6
0.55
0.55
VS = ±5V
0.5
-6
-4
-2
0
2
4
6
VS = ±15V
0.5
-20 -15 -10
-5
0
VCM (V)
VCM (V)
Figure 32.
Figure 33.
5
10
15
20
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Typical Performance Characteristics (continued)
IS vs. VCM
IS vs. VCM
1
1
-
+
VCM = V +0.5V
VCM = V -0.5V
0.9
0.9
-40°C
IS (mA)
IS (mA)
-40°C
0.8
25°C
85°C
0.7
0.6
0.8
25°C
85°C
0.7
125°C
0.6
125°C
0.5
0.5
5
0
10
15
20
25
30
35
0
40
5
10
15
35
40
Positive Output Swing vs. Supply Voltage
0.25
0.5
RL = 2 k:
RL = 10 k:
125°C
0.2
VOUT FROM RAIL (V)
0.4
VOUT FROM RAIL (V)
30
Figure 35.
Positive Output Swing vs. Supply Voltage
85°C
0.3
25°C
0.2
-40°C
125°C
85°C
0.15
25°C
0.1
-40°C
0.05
0.1
0
10
20
30
0
40
0
10
20
VS (V)
30
40
VS (V)
Figure 36.
Figure 37.
Negative Output Swing vs. Supply Voltage
Negative Output Swing vs. Supply Voltage
0.25
0.9
RL = 10 k:
RL = 2 k:
0.8
125°C
0.2
0.7
0.6
VOUT FROM RAIL (V)
VOUT FROM RAIL (V)
25
VS (V)
VS (V)
Figure 34.
0
20
125°C
0.5
85°C
0.4
25°C
0.3
-40°C
0.2
85°C
0.15
25°C
0.1
-40°C
0.05
0.1
0
0
0
10
20
30
40
10
20
30
40
VS (V)
VS (V)
Figure 38.
12
0
Figure 39.
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Typical Performance Characteristics (continued)
Open Loop Frequency with Various Capacitive Load
140
VS = ±15V
120
RL = 10 M:
Open Loop Frequency with Various Resistive Load
158
140
135
120
VS = ±15V
CL = 20 pF
158
135
600:
100
90
80
68
60
20 pF
500 pF
40 GAIN
45
23
20
90
68
60
40
100 k:, 1 M:, 10 M:
GAIN
45
23
20
1000 pF
0
600:
0
500 pF
100 pF
-20
1k
10k
1M
100k
0
0
-23
100M
10M
-20
1k
1M
100k
10k
10M
-23
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 40.
Figure 41.
Open Loop Frequency with Various Supply Voltage
Open Loop Frequency Response with Various
Temperatures
120
CL = 20 pF
100
PHASE
80
±15V
135
120
113
100
90
80
±5V
±1.35V
GAIN
158
140
VS = ±15V
68
60
40
158
45
GAIN (dB)
RL = 1 M:
PHASE (°)
140
GAIN (dB)
113
PHASE
RL = 1 M: 135
CL = 20 pF
PHASE
113
90
-40°C
68
60
40
25°C
GAIN
45
±15V
PHASE (°)
GAIN (dB)
80
113
PHASE (°)
100 pF
GAIN (dB)
PHASE
PHASE (°)
100
125°C
23
20
23
20
±5V
0
0
125°C, 25°C, -40°C
0
0
±1.35V
-20
1k
10k
1M
100k
-23
100M
10M
-20
1k
1M
100k
10k
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 42.
Figure 43.
CMRR vs. Frequency
-23
100M
+PSRR vs. Frequency
140
100
VS = ±5V
90
120
VS = ±15V
80
70
+PSRR (dB)
CMRR (dB)
100
80
60
60 VS = 2.7V
VS = ±5V
50
40
30
40
20
20
0
10
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
0
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 44.
Figure 45.
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Typical Performance Characteristics (continued)
-PSRR vs. Frequency
100
90
Small Signal Step Response
VS = ±15V
INPUT
80
VS = ±5V
100 pF
100 mV/DIV
-PSRR (dB)
70 VS = 2.7V
60
50
40
360 pF
560 pF
30
750 pF
20
10
1000 pF
0
10
100
1k
10k
100k
2 Ps/DIV
1M
FREQUENCY (Hz)
Figure 46.
Figure 47.
Large Signal Step Response
Input Referred Noise Density vs. Frequency
1000
100
VS = 2.7V
20,000 pF
30,000 pF
10
100
VOLTAGE
1
10
CURRENT
CURRENT NOISE (pA/ Hz)
20 V/DIV
10,000 pF
VOLTAGE NOISE (nV/ Hz)
INPUT
40,000 pF
0
200 Ps/DIV
1
10
100
1k
10k
0.1
100k
FREQUENCY (Hz)
Figure 48.
Figure 49.
VOLTAGE
1
10
CURRENT
VOLTAGE
1
10
100
1k
10k
0.1
100k
0
FREQUENCY (Hz)
1
10
100
1k
10k
0.1
100k
FREQUENCY (Hz)
Figure 50.
14
10
100
CURRENT
0
10
VOLTAGE NOISE (nV/ Hz)
10
100
100
VS = ±15V
CURRENT NOISE (pA/ Hz)
VOLTAGE NOISE (nV/ Hz)
VS = ±5V
1
Input Referred Noise Density vs. Frequency
1000
100
CURRENT NOISE (pA/ Hz)
Input Referred Noise Density vs. Frequency
1000
Figure 51.
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Typical Performance Characteristics (continued)
THD+N vs. Frequency
0
AV = +2
-10
VIN = 750 mVPP
RL = 100 k:
THD+N (dB)
-20
-30
-40
-50
VS = ±15V VS = 2.7V
-60
-70
-80
10
VS = ±5V
100
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 52.
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APPLICATION INFORMATION
GENERAL INFORMATION
Low supply current and wide bandwidth, greater than rail-to-rail input range, full rail-to-rail output, good capacitive
load driving ability, wide supply voltage and low distortion all make the LM7341 ideal for many diverse
applications.
The high common-mode rejection ratio and full rail-to-rail input range provides precision performance when
operated in non-inverting applications where the common-mode error is added directly to the other system
errors.
CAPACITIVE LOAD DRIVING
The LM7341 has the ability to drive large capacitive loads. For example, 1000 pF only reduces the phase margin
to about 30 degrees.
POWER DISSIPATION
Although the LM7341 has internal output current limiting, shorting the output to ground when operating on a
+30V power supply will cause the op amp to dissipate about 350 mW. This is a worst-case example. In the 5-pin
SOT-23 package, the higher thermal resistance will cause a calculated rise of 113°C. This can raise the junction
temperature to above the absolute maximum temperature of 150°C.
Operating from split supplies greatly reduces the power dissipated when the output is shorted. Operating on
±15V supplies can only cause a temperature rise of 57°C in the 5-pin SOT-23 package, assuming the short is to
ground.
WIDE SUPPLY RANGE
The high power-supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) provide precision
performance when operated on battery or other unregulated supplies. This advantage is further enhanced by the
very wide supply range (2.5V–32V) offered by the LM7341. In situations where highly variable or unregulated
supplies are present, the excellent PSRR and wide supply range of the LM7341 benefit the system designer with
continued precision performance, even in such adverse supply conditions.
SPECIFIC ADVANTAGES OF 5-Pin SOT-23 (TinyPak)
The obvious advantage of the 5-pin SOT-23, TinyPak, is that it can save board space, a critical aspect of any
portable or miniaturized system design. The need to decrease overall system size is inherent in any handheld,
portable, or lightweight system application.
Furthermore, the low profile can help in height limited designs, such as consumer hand-held remote controls,
sub-notebook computers, and PCMCIA cards.
An additional advantage of the tiny package is that it allows better system performance due to ease of package
placement. Because the tiny package is so small, it can fit on the board right where the op amp needs to be
placed for optimal performance, unconstrained by the usual space limitations. This optimal placement of the tiny
package allows for many system enhancements, not easily achieved with the constraints of a larger package.
For example, problems such as system noise due to undesired pickup of digital signals can be easily reduced or
mitigated. This pick-up problem is often caused by long wires in the board layout going to or from an op amp. By
placing the tiny package closer to the signal source and allowing the LM7341 output to drive the long wire, the
signal becomes less sensitive to such pick-up. An overall reduction of system noise results.
Often times system designers try to save space by using dual or quad op amps in their board layouts. This
causes a complicated board layout due to the requirement of routing several signals to and from the same place
on the board. Using the tiny op amp eliminates this problem.
Additional space savings parts are available in tiny packages from Texas Instruments, including low power
amplifiers, precision voltage references, and voltage regulators.
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LOW DISTORTION, HIGH OUTPUT DRIVE CAPABILITY
The LM7341 offers superior low-distortion performance, with a total-harmonic-distortion-plus-noise of −66 dB at f
= 10 kHz. The advantage offered by the LM7341 is its low distortion levels, even at high output current and low
load resistance.
Typical Applications
HANDHELD REMOTE CONTROLS
The LM7341 offers outstanding specifications for applications requiring good speed/power trade-off. In
applications such as remote control operation, where high bandwidth and low power consumption are needed.
The LM7341 performance can easily meet these requirements.
OPTICAL LINE ISOLATION FOR MODEMS
The combination of the low distortion and good load driving capabilities of the LM7341 make it an excellent
choice for driving opto-coupler circuits to achieve line isolation for modems. This technique prevents telephone
line noise from coupling onto the modem signal. Superior isolation is achieved by coupling the signal optically
from the computer modem to the telephone lines; however, this also requires a low distortion at relatively high
currents. Due to its low distortion at high output drive currents, the LM7341 fulfills this need, in this and in other
telecom applications.
REMOTE MICROPHONE IN PERSONAL COMPUTERS
Remote microphones in Personal Computers often utilize a microphone at the top of the monitor which must
drive a long cable in a high noise environment. One method often used to reduce the nose is to lower the signal
impedance, which reduces the noise pickup. In this configuration, the amplifier usually requires 30 dB–40 dB of
gain, at bandwidths higher than most low-power CMOS parts can achieve. The LM7341 offers the tiny package,
higher bandwidths, and greater output drive capability than other rail-to-rail input/output parts can provide for this
application.
LM7341 AS A COMPARATOR
The LM7341 can also be used as a comparator and provides quite reasonable performance. Note however that
unlike a typical comparator an op amp has a maximum allowed differential voltage between the input pins. For
the LM7341, as stated in the Absolute Maximum Ratings section, this maximum voltage is VIN Differential =
±15V. Beyond this limit, even for a short time, damage to the device may occur.
As an inverting comparator at VS = 30V and 1V of overdrive there is typically 12 μs of propagation delay. At VS =
30V and 50 mV of overdrive there is typically 17 µs of propagation delay.
+VCC
VIN
VOUT
+
-VEE
Figure 53. Inverting Comparator
Similarly a non-inverting comparator at VS = 30V and 1V of overdrive there is typically 12 µs of propagation
delay. At VS = 30V and 50 mV of overdrive there is typically 17 μs of propagation delay.
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+VCC
VOUT
+
VIN
-VEE
Figure 54. Non-Inverting Comparator
COMPARATOR WITH HYSTERESIS
The basic comparator configuration may oscillate or produce a noisy output if the applied differential input
voltage is near the comparator's offset voltage. This usually happens when the input signal is moving very slowly
across the comparator's switching threshold. This problem can be prevented by the addition of hysteresis or
positive feedback.
INVERTING COMPARATOR WITH HYSTERESIS
The inverting comparator with hysteresis requires a three resistor network that is referenced to the supply voltage
VCC of the comparator, as shown in Figure 55. When VIN at the inverting input is less than VA, the voltage at the
non-inverting node of the comparator (VIN < VA), the output voltage is high (for simplicity assume VOUT switches
as high as VCC). The three network resistors can be represented as R1||R3 in series with R2. The lower input trip
voltage VA1 is defined as
VA1 = VCCR2 / ((R1||R3) + R2)
(1)
When VIN is greater than VA (VIN > VA), the output voltage is low, very close to ground. In this case the three
network resistors can be presented as R2||R3 in series with R1. The upper trip voltage VA2 is defined as
VA2 = VCC (R2||R3) / ((R1+ (R2||R3)
(2)
The total hysteresis provided by the network is defined as
Delta VA = VA1- VA2
(3)
For example to achieve 50 mV of hysteresis when VCC = 30V set R1 = 4.02 kΩ, R2 = 4.02 kΩ, and R3 = 1.21 MΩ.
With these resistors selected the error due to input bias current is approximately 1 mV. To minimize this error it is
best to use low resistor values on the inputs.
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+VCC = +30V
R1
4.02 k:
30V
-
VIN
VOUT
VOUT
VA1
VA2
+
VA
0
14.975
R2
15.025
VIN
R3
1.21 M:
4.02 k:
VOUT HIGH
VOUT LOW
+VCC
+VCC
R1
R1
R3
VA2
VA1
R2
R3
R2
Figure 55. Inverting Comparator with Hysteresis
NON-INVERTING COMPARATOR WITH HYSTERESIS
A non-inverting comparator with hysteresis requires a two resistor network, and a voltage reference (VREF) at the
inverting input. When VIN is low, the output is also low. For the output to switch from low to high, VIN must rise up
to VIN1 where VIN1 is calculated by
VIN1 = R1*(VREF/R2) + VREF
(4)
When VIN is high, the output is also high, to make the comparator switch back to it's low state, VIN must equal
VREF before VA will again equal VREF . VIN can be calculated by
VIN2 = (VREF (R1+ R2) - VCCR1)/R2
(5)
The hysteresis of this circuit is the difference between VIN1 and VIN2.
Delta VIN = VCCR1/R2
(6)
For example to achieve 50 mV of hysteresis when VCC = 30V set R1 = 20Ω and R2 = 12.1 kΩ.
+VCC = +30V
-
VREF = +15V
VOUT
VA
VIN
+
R1
20:
R2
12.1 k:
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VOUT HIGH
VOUT LOW
+VCC
VIN 1
R2
R1
VA = VREF
VA = VREF
R1
R2
30V
VOUT
VIN 2
VIN 1
0
14.975
15.025
VIN
VIN 2
Figure 56. Non-Inverting Comparator with Hysteresis
OTHER SOT-23 AMPLIFIERS
The LM7321 is a rail-to-rail input and output amplifier that can tolerate unlimited capacitive load. It works from
2.7V to ±15V and across the −40°C to 125°C temperature range. It has 20 MHz gain-bandwidth, and is available
in both 5-Pin SOT-23 and 8-Pin SOIC packages.
The LM6211 is a 20 MHz part with CMOS input, which runs on 5V to 24V single supplies. It has rail-to-rail output
and low noise.
The LMP7701 is a rail-to-rail input and output precision part with an input voltage offset under 220 microvolts and
low noise. It has 2.5 MHz bandwidth and works on 2.7V to 12V supplies.
SMALLER SC70 AMPLIFIERS
The LMV641 is a 10 MHz amplifier which uses only 140 micro amps of supply current. The input voltage offset is
less than 0.5 mV.
The LMV851 is an 8 MHz amplifier which uses only 0.4 mA supply current, and is available in the smaller SC70
package. The LMV851 also resists Electro Magnetic Interference (EMI) from mobile phones and similar high
frequency sources. It works on 2.7V to 5.5 V supplies.
Detailed information on these and a wide range of other parts can be found at www.ti.com.
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REVISION HISTORY
Changes from Revision A (March 2013) to Revision B
•
Page
Changed layout of National Data Sheet to TI format .......................................................................................................... 20
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PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
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)
LM7341MF/NOPB
ACTIVE
SOT-23
DBV
5
1000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 125
AV4A
LM7341MFE/NOPB
ACTIVE
SOT-23
DBV
5
250
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 125
AV4A
LM7341MFX/NOPB
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 125
AV4A
(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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