INA146UA [TI]
高电压可编程增益差分放大器 | D | 8 | -40 to 85;
| 型号： | INA146UA |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 高电压可编程增益差分放大器 | D | 8 | -40 to 85 放大器 光电二极管 |
| 文件： | 总17页 (文件大小：806K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
INA146
INA146
For most current data sheet and other product
information, visit www.burr-brown.com
High-Voltage, Programmable Gain
DIFFERENCE AMPLIFIER
FEATURES
DESCRIPTION
● HIGH COMMON-MODE VOLTAGE:
The INA146 is a precision difference amplifier that
can be used to accurately attenuate high differential
voltages and reject high common-mode voltages for
compatibility with common signal processing voltage
levels. High-voltage capability also affords inherent
input protection. The input common-mode range ex-
tends beyond both supply rails, making the INA146
well-suited for both single and dual supply applica-
tions.
+40V at VS = +5V
±100V at VS = ±15V
● DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:
Set with External Resistors
● LOW QUIESCENT CURRENT: 570µA
● WIDE SUPPLY RANGE:
Single Supply: 4.5V to 36V
Dual Supplies: ±2.25V to ±18V
On-chip precision resistors are laser-trimmed to achieve
accurate gain and high common-mode rejection. Ex-
cellent TCR tracking of these resistors assures contin-
ued high precision over temperature.
● LOW GAIN ERROR: 0.025%
● HIGH CMR: 80dB
● SO-8 PACKAGE
A 10:1 difference amplifier provides 0.1V/V gain
when the output amplifier is used as a unity-gain
buffer. In this configuration, input voltages up to
±100V can be measured. Gains greater than 0.1V/V
can be set with an external resistor pair without affect-
ing the common-mode input range.
APPLICATIONS
● CURRENT SHUNT MEASUREMENTS
● SENSOR AMPLIFIER
● SYNCHRONOUS DEMODULATOR
The INA146 is available in the SO-8 surface-mount
package specified for the extended industrial tempera-
ture range, –40°C to +85°C.
●
CURRENT AND DIFFERENTIAL LINE
RECEIVER
● VOLTAGE-CONTROLLED CURRENT
SOURCE
● BATTERY POWERED SYSTEMS
● LOW COST AUTOMOTIVE
RG1
RG2
V+
INSTRUMENTATION
7
5
R1
R2
100kΩ
10kΩ
2
VIN–
R5
10kΩ
A2
(1%)
VO
6
G = 0.1
A1
VO = (VI+N – VI–N) 0.1 (1 + RG2/RG1
)
R3
R4
100kΩ
10kΩ
3
VIN+
INA146
4
1
8
V–
Ref
V01
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1999 Burr-Brown Corporation
PDS-1491A
Printed in U.S.A. September, 1999
SBOS109
SPECIFICATIONS: VS = ±2.25V to ±18V Dual Supplies
At TA = +25°C, G = 0.1, RL = 10kΩ connected to ground and ref pin connected to ground unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = –40°C to +85°C.
INA146UA
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE, VO
Input Offset Voltage
vs Temperature
vs Power Supply
vs Time
RTI(1, 2)
VS = ±15, VCM = VO = 0V
VOS
∆VOS /∆T
PSRR
±1
±5
mV
See Typical Curve
VS = ±1.35V to ±18V
±100
±3
±1
±600
µV/V
µV/mo
mV
Offset Voltage, V01
RTI(1, 2)
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection
Over Temperature
VCM
CMRR
(VIN+) – (VIN–) = 0V, VO = 0V
VCM = 11 (V–) to 11 (V+) = 11, RS = 0Ω
±100(3)
V
dB
dB
70
64
80
74
INPUT BIAS CURRENT(2)
Bias Current
Offset Current
VCM = VS/2
IB
IOS
±50
±5
nA
nA
INPUT IMPEDANCE
Differential (non-inverting input)
Differential (inverting input)
Common-Mode
110
91.7
55
kΩ
kΩ
kΩ
NOISE
RTI(1, 4)
Voltage Noise, f = 0.1Hz to 10Hz
Voltage Noise Density, f = 1kHz
10
550
µVp-p
nV/√Hz
en
GAIN
G = 0.1 to 100
Gain Equation
Initial(1)
Gain Error
vs Temperature
G = 0.1 • (1 + RG2/RG1
)
V/V
V/V
%
ppm/°C
%
ppm/°C
% of FS
0.1
±0.025
±1
±0.025
±1
RL = 100kΩ, VO = (V–)+0.15 to (V+)–1, G = 1
RL = 100kΩ, VO = (V–)+0.25 to (V+)–1, G = 1
RL = 10kΩ, VO = (V–)+0.3 to (V+)–1.25, G = 1
RL = 10kΩ, VO = (V–)+0.5 to (V+)–1.25, G = 1
VO = (V–)+0.3 to (V+)–1.25, G = 1
±0.1
±10
±0.1
±10
±0.01
vs Temperature
Nonlinearity
±0.001
FREQUENCY RESPONSE
Small Signal Bandwidth
G = 0.1
G = 1
550
50
0.45
40
kHz
kHz
V/µs
µs
Slew Rate
Settling Time, 0.1%
0.01%
G = 1, 10V Step
G = 1, 10V Step
80
µs
Overload Recovery
50% Input Overload
40
µs
OUTPUT, VO
Voltage Output
Over Temperature
RL = 100kΩ, G = 1
RL = 100kΩ, G = 1
RL = 10kΩ, G = 1
RL = 10kΩ, G = 1
Continuous to Common
Stable Operation
(V–) + 0.15
(V–) + 0.25
(V–) + 0.3
(V–) + 0.5
(V+) – 1
(V+) – 1
(V+) – 1.25
(V+) – 1.25
V
V
V
V
mA
pF
Over Temperature
Short-Circuit Current
Capacitive Load
±15
1000
POWER SUPPLY
Specified Voltage Range, Dual Supplies
Operating Voltage Range
Quiescent Current
±2.25
±1.35
±18
±18
±700
±750
V
V
µA
µA
VIN = 0, IO = 0
±570
Over Temperature
TEMPERATURE RANGE
Specified Range
Operating Range
Storage Range
–40
–55
–55
+85
+125
+125
°C
°C
°C
Thermal Resistance
θJA
150
°C/W
NOTES: (1) Overall difference amplifier configuration. Referred to input pins (VIN+ and VIN–), gain = 0.1V/V. Specified with 10kΩ in feedback of A2. (2) Input offset
voltage specification includes effects of amplifier’s input bias and offset currents. (3) Common-mode voltage range is 11 (V–) to 11 [(V+) – 1] with a maximum of ±100V.
(4) Includes effects of input current noise and thermal noise contribution of resistor network.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
2
INA146
SPECIFICATIONS: VS = +5V Single Supply
At TA = +25°C, G = 1, RL = 10kΩ connected to VS /2 and Ref pin connected to VS /2 unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = –40°C to +85°C.
INA146UA
TYP
PARAMETER
CONDITION
MIN
MAX
UNITS
OFFSET VOLTAGE, VO
Input Offset Voltage
vs Temperature
vs Power Supply Rejection Ratio
vs Time
RTI(1, 2)
VCM = VO = 0V
VOS
∆VOS /∆T
PSRR
±3
±10
mV
See Typical Curve
VS = ±1.35V to ±18V
±100
±3
±600
µV/°C
µV/mo
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
Over Temperature
VCM
CMRR
VIN+ – VIN– = 0V, VO = 0V
VCM = –25V to +19V, RS = 0Ω
–25
70
64
19
V
dB
dB
80
74
INPUT BIAS CURRENT(2)
Bias Current
Offset Current
IB
IOS
±50
±5
nA
nA
INPUT IMPEDANCE
Differential (non-inverting input)
Differential (inverting input)
Common-Mode
110
91.7
55
kΩ
kΩ
kΩ
NOISE
RTI(1, 3, 4)
Voltage Noise, f = 0.1Hz to 10Hz
Voltage Noise Density, f = 1kHz
10
550
µVp-p
nV/√Hz
en
GAIN
Gain Equation
Initial(1)
Gain Error
vs Temperature
G = 0.1 to 100
G = 0.1 • (1 + RG2 /RG1)
V/V
V/V
V/V
0.1
±0.025
±1
±0.025
±1
RL = 100kΩ, VO = 0.15V to 4V, G = 1
RL = 100kΩ, VO = 0.25V to 4V, G = 1
RL = 10kΩ, VO = 0.3V to 3.75V, G = 1
RL = 10kΩ, VO = 0.5V to 3.75V, G = 1
VO = +0.3 to +3.75, G = 1
±0.1
±10
±0.1
±10
±0.01
%
ppm/°C
%
ppm/°C
% of FS
vs Temperature
Nonlinearity
±0.001
FREQUENCY RESPONSE
Small Signal Bandwidth
G = 0.1
G = 1
550
50
0.45
40
kHz
kHz
V/µs
µs
Slew Rate
Settling Time, 0.1%
0.01%
G = 1, 10V Step
G = 1, 10V Step
80
µs
Overload Recovery
50% Input Overload
40
µs
OUTPUT, VO
Voltage Output
Over Temperature
RL = 100kΩ, G = 1
RL = 100kΩ, G = 1
RL = 10kΩ, G = 1
RL = 10kΩ, G = 1
Continuous to Common
Stable Operation
0.15
0.25
0.3
4
4
3.75
3.75
V
V
V
V
mA
pF
Over Temperature
Short-Circuit Current
Capacitive Load
0.5
±15
1000
POWER SUPPLY
Voltage Range, Dual Supplies
Voltage Range, Single Supply
Quiescent Current
±2.25
±4.5
±18
±36
±700
±750
V
V
µA
µA
VIN = 0, IO = 0
±570
Over Temperature
TEMPERATURE RANGE
Specified Range
Operating Range
Storage Range
–40
–55
–55
+85
+125
+125
°C
°C
°C
Thermal Resistance
θJA
150
°C/W
NOTES: (1) Overall difference amplifier configuration. Referred to input pins (VIN+ and VIN–), gain = 0.1V/V. Specified with 10kΩ in feedback of A2. (2) Input offset
voltage specification includes effects of amplifier’s input bias and offset currents. (3) Includes effects of input current noise and thermal noise contribution of resistor
network. (4) Common-mode voltage range is 11 (V–) to 11 [(V+) – 1] with a maximum of ±100V.
®
3
INA146
AMPLIFIER A1, A2 PERFORMANCE
At TA = +25°C, G = 0.1, RL = 10kΩ connected to ground and Ref pin, unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = –40°C to +85°C.
INA146UA
TYP
PARAMETER
CONDITION
MIN
MAX
UNITS
OFFSET VOLTAGE, VO
Input Offset Voltage
vs Temperature
RTI(1, 2)
VS = ±15V, VCM = VO = 0V
TA = –40°C to +85°C
VOS
∆VOS /∆T
±0.5
±1
mV
µV/°C
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
VCM
CMRR
VIN+ – VIN– = 0V, VO = 0V
(V–) to (V+) –1
90
V
dB
V
CM = (V–) to (V+) –1
OPEN-LOOP GAIN
Open Loop Gain
AOL
110
dB
INPUT BIAS CURRENT(2)
Bias Current
Offset Current
IB
IOS
±50
±5
nA
nA
RESISTOR AT A1 OUTPUT, VO1
Initial
Error
10
±1
kΩ
%
Temperature Drift Coefficient
±100
ppm/°C
PIN CONFIGURATION
ELECTROSTATIC
DISCHARGE SENSITIVITY
Top View
SO-8
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
Ref
VI–N
VI+N
V–
1
2
3
4
8
7
6
5
VO1
V+
VO
RG
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.
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage, V+ to V–.................................................................... 36V
Signal Input Terminals, Voltage ...................................................... ±100V
Current ....................................................... ±1mA
Output Short Circuit (to ground).............................................. Continuous
Operating Temperature ..................................................–55°C to +125°C
Storage Temperature .....................................................–55°C to +150°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +240°C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
PACKAGE/ORDERING INFORMATION
PACKAGE
SPECIFIED
DRAWING
NUMBER(1)
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER(2)
TRANSPORT
MEDIA
PRODUCT
PACKAGE
INA146UA
"
SO-8
"
182
"
–40°C to +85°C
INA146UA
"
INA146UA
INA146UA/2K5
Rails
Tape and Reel
"
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book, or visit the Burr-Brown web site
at www.burr-brown.com. (2) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel).
Ordering 2500 pieces of “INA146UA/2K5” will get a single 2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of
Burr-Brown IC Data Book.
®
4
INA146
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±15V, G = 0.1, RL = 10kΩ connected to ground and Ref pin connected to ground, unless otherwise noted.
GAIN vs FREQUENCY
GAIN vs FREQUENCY
G = 10
40
20
40
20
VS = ±15V
VS = ±15V
CL = 1000pF
CL = 200pF 10kΩ
G = 10
G = 1
0
0
G = 1
–20
–40
–20
–40
G = 0.1
G = 0.1
100
1K
10K
100K
1M
10M
100
1K
10K
100K
1M
10M
Frequency (Hz)
Frequency (Hz)
POWER SUPPLY REJECTION vs FREQUENCY
COMMON-MODE REJECTION vs FREQUENCY
100
80
60
40
20
0
100
80
60
40
20
0
PSR+
(VS = ±15V)
PSR+
(VS = +5V)
PSR–
(VS = ±15V)
1
10
100
1k
10k
100k
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
Frequency (Hz)
0.1Hz to 10Hz VOLTAGE NOISE (RTI)
INPUT VOLTAGE NOISE DENSITY
10k
G = 0.1
1k
G = 10
G = 1
100
0.1
1
10
100
1k
10k
100k
500ms/div
Frequency (Hz)
®
5
INA146
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, VS = ±15V, G = 0.1, RL = 10kΩ connected to ground and Ref pin connected to ground, unless otherwise noted.
QUIESCENT CURRENT AND
SHORT-CIRCUIT CURRENT vs TEMPERATURE
SLEW RATE vs TEMPERATURE
670
650
630
610
590
570
550
530
510
490
470
20
18
16
14
12
10
8
0.6
0.55
0.5
G = 1
G = 1
ISC
0.45
0.4
IQ
0.35
0.3
6
4
0.25
0.2
2
0
–60 –40 –20
0
20
40
60 80 100
140
120
–60 –40 –20
0
20
40
60 80 100
140
120
Temperature (°C)
Temperature (°C)
GAIN AND PHASE vs FREQUENCY
Op Amp A1 and A2
SETTLING TIME vs LOAD CAPACITANCE
120
100
80
60
40
20
0
110
100
90
80
70
60
50
40
30
20
10
0
TS vs CLOAD
VS = ±15V
0.01%, G = 1
G
RL = 10kΩ || 200pF
Φ
–90
RL = 10kΩ || 1nF
0.1%, G = 0.1
–135
–180
0.1%, G = 1
–10
1
3
10
30
100
1
10
100
1k
Frequency (Hz)
10k
100k
1M
Load Capacitance (nF)
MAXIMUM OUTPUT VOLTAGE SWING
vs OUTPUT CURRENT
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
Typical production
S = ±2.25V
15
10
5
25
20
15
10
5
+85°C
V
distribution of
–25°C
+25°C
packaged units.
+125°C
+85°C
0
–55°C
+125°C
–5
–10
–15
+25°C
–25°C
+85°C
0
0
2
4
6
8
10
12
14
16
Output Current (mA)
Offset Voltage, RTI (mV)
®
6
INA146
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, VS = ±15V, G = 0.1, RL = 10kΩ connected to ground and Ref pin connected to ground, unless otherwise noted.
OFFSET VOLTAGE
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
PRODUCTION DISTRIBUTION
40
35
30
25
20
15
10
5
30
25
20
15
10
5
Typical production
distribution of
packaged units.
Typical production
distribution of
packaged units.
V
S = ±15V
VS = ±15V
0
0
Offset Voltage Drift, RTI (µV/°C)
Offset Voltage, RTI (mV)
SMALL-SIGNAL STEP RESPONSE
(G = 0.1, CL = 1000pF)
SMALL-SIGNAL STEP RESPONSE
(G = 0.1, RL = 10kΩ, CL = 200pF)
5µs/div
5µs/div
LARGE-SIGNAL STEP RESPONSE
SMALL-SIGNAL STEP RESPONSE
(G = 1, CL = 1000pF)
(G = 1, RL = 10kΩ, CL = 200pF)
50µs/div
5µs/div
®
7
INA146
SETTING THE GAIN
APPLICATION INFORMATION
The gain of the INA146 is set by using two external
resistors, RG1 and RG2, according to the equation:
The INA146 is a programmable gain difference amplifier
consisting of a gain of 0.1 difference amplifier and a pro-
grammable-gain output buffer stage. Basic circuit connec-
tions are shown in Figure 1. Power supply bypass capacitors
should be connected close to pins 4 and 7 as shown. The
amplifier is programmable in the range of G = 0.1 to G = 50
with two external resistors.
G = 0.1 • (1 + RG2/RG1)
For a total gain of 0.1, A2 is connected as a buffer amplifier
with no RG1. A feedback resistor, RG2 = 10kΩ, should be
used in the buffer connection. This provides bias current
cancellation (in combination with internal R5) to assure
specified offset voltage performance. Commonly used val-
ues are shown in the table of Figure 1. Resistor values for
other gains should be chosen to provide a 10kΩ parallel
resistance.
The output of A1 is connected to the noninverting input of
A2 through a 10kΩ resistor which is trimmed to ±1%
absolute accuracy. The A2 input is available for applications
such as a filter or a precision current source. See application
figures for examples.
COMMON-MODE RANGE
OPERATING VOLTAGE
The 10:1 input resistor ratio of the INA146 provides an input
common-mode range that can extend well beyond the power
supply rails. Exact range depends on the power supply
voltage and the voltage applied to the Ref terminal (pin 1).
To assure proper operation, the voltage at the non-inverting
input of A1 (an internal node) must be within its linear
operating range. Its voltage is determined by the simple 10:1
voltage divider between pin 3 and pin 1. This voltage must
be between V– and (V+) – 1V.
The INA146 is fully specified for supply voltages from
±2.25V to ±18V with key parameters guaranteed over the
temperature range –40°C to +85°C. The INA146 can be
operated with single or dual supplies with excellent perfor-
mance. Parameters that vary significantly with operating
voltage, load conditions or temperature are shown in the
typical performance curves.
+VS
RG1
RG2
0.1µF
RB
7
5
R1
R2
100kΩ
10kΩ
VIN–
VO = (VI+N – VI–N) 0.1 (1 + RG2/RG1
)
2
R5
10kΩ
A2
VO
6
A1
STANDARD 1% RESISTORS
R3
100kΩ
R4
10kΩ
TOTAL GAIN A2 GAIN
RG1
(Ω)
RG2
(Ω)
RB
(Ω)
(V/V)
(V/V)
VI+N
0.1
0.2
0.5
1
2
5
10
20
50
100
1
2
5
10
20
(None)
20k
10k
20k
—
—
—
—
—
—
—
9.53k
10k
10k
3
INA146
4
1
8
12.4k
11.0k
10.5k
10.2k
10.2k
499
49.9k
100k
200k
499k
1M
100k
49.9k
100k
0.1µF
V01
50
–VS
100
200
500
1000
100
100
FIGURE 1. Basic Circuit Connections.
®
8
INA146
OFFSET TRIM
INPUT IMPEDANCE
The INA146 is laser-trimmed for low offset voltage and
drift. Most applications require no external offset adjust-
ment. Figure 2 shows an optional circuit for trimming the
offset voltage. A voltage applied to the Ref terminal will
be summed with the output signal. This can be used to null
offset voltage. To maintain good common-mode rejection,
the source impedance of a signal applied to the Ref
terminal should be less than 10Ω and a resistor added to
the positive input terminal should be 10 times that, or
100Ω. Alternatively, the trim voltage can be buffered with
an op amp such as the OPA277.
The input impedance of the INA146 is determined by the
input resistor network and is approximately 100kΩ. The
source impedance at the two input terminals must be nearly
equal to maintain good common-mode rejection. A 12Ω
mismatch in impedance between the two inputs will cause
the typical common-mode rejection to be degraded to ap-
proximately 72dB. Figure 7 shows a common application
measuring power supply current through a shunt resistor.
The source impedance of the shunt resistor, RS, is balanced
by an equal compensation resistor, RC.
Source impedances greater than 800Ω are not recommended,
even if they are perfectly matched. Internal resistors are laser
trimmed for accurate ratios, not to absolute values. Adding
equal resistors greater than 800Ω can cause a mismatch in
the total resistor ratios, degrading CMR.
10kΩ
5
R1
R2
VIN–
R5
A2
VO
6
R3
A1
100Ω
VIN+
R4
1
+15V
Offset Adjustment Range = ±15mV, RTI
(±1.5mV at pin 1)
VO1
RT
100kΩ
100kΩ
10Ω
NOTE: Increasing the trim resistor
T will decrease the trim range
–15V
R
FIGURE 2. Optional Offset Trim Circuit.
RG2
10kΩ
V+
+5V
RX
5
7
2
Output scaled to low
voltage A/D converter.
10.8V
+
10kΩ
V
O = 1.08V nominal
VIN
Load
6
3
RX
INA146
V+
Max VIN
+5V
+7V
40V
60V
4
1
8
Differential measurement at
battery rejects voltage drop
in connection resistance, RX.
+10V
95V
≥ 11V 100V
FIGURE 3. Measuring Voltages Greater than Supply Voltage.
®
9
INA146
Pole at
106Hz
G = 1
1500pF
RG2
10kΩ
RG2
1MΩ
RG1
10kΩ
5
VI–N
2
3
5
2
VI–N
10kΩ
VO
6
10kΩ
VO
VI+N
6
INA146
1
8
1N4684 (3.3V)
1N914
VI+N
3
Output clamps at
approximately ±4V.
INA146
1
8
22nF
Pole at
720Hz
FIGURE 5. Output Clamp.
FIGURE 4. Noise Filtering.
RG2
10kΩ
5
R1
R2
VI–N
2
0V ≤ VO ≤ 5V
10kΩ
VO
6
R3
R4
3
VI+N
INA146
8
1
1N914
(1)
5.0V
Voltage
Reference
or analog-to-digital VS
1N914
(1)
NOTE: (1) 1/2 OPA2342 with VS connected to +5V and GND.
FIGURE 6. Precision Clamp.
®
10
INA146
RG2
RG1
100kΩ
11kΩ
Power
Supply
5
For sense resistors (RS)
greater than 10Ω, use
series compensation
resistor (RC) for good
common-mode rejection.
Sense resistors greater
than 500Ω are not
2
RC
100Ω
VO
6
recommended.
RS
100Ω
3
INA146
1
8
Load
VO1
FIGURE 7. Current Monitor, G = 1.
+5V
24V
8.4kΩ
Feedback
7
5
2
8kΩ
1V
VO
10kΩ
2kΩ
6
SHUNT
R-I Lamp/10
e.g., 0.1Ω for 1A
1V – 50mV
3
INA146
10MΩ
4
1
8
Ref
Lamp
FIGURE 8. Comparator Output with Optional Hysteresis Application to Sense Lamp Burn-Out.
RG2
RG1
100kΩ
11kΩ
RG2
10kΩ
5
VI–N
5
2
2
VIN
VO
10kΩ
VO
6
R1
1MΩ
3
VI+N
INA146
1
3
VI+N
C1
0.1µF
INA146
1
8
VO1
Pole at
1
IOUT – (VI+N – VI–N)/10kΩ
f =
= 1.6Hz
OPA277
2πR1RC
FIGURE 9. AC Coupling (DC Restoration).
FIGURE 10. Precision Current Source.
®
11
INA146
PACKAGE OPTION ADDENDUM
www.ti.com
29-Jun-2023
PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
(6)
INA146UA
INA146UA/2K5
INA146UAE4
ACTIVE
SOIC
SOIC
SOIC
D
D
D
8
8
8
75
RoHS & Green
NIPDAU
Level-3-260C-168 HR
Level-3-260C-168 HR
Level-3-260C-168 HR
-40 to 85
-40 to 85
-40 to 85
INA
146UA
Samples
Samples
ACTIVE
2500 RoHS & Green
75 RoHS & Green
NIPDAU
NIPDAU
INA
146UA
LIFEBUY
INA
146UA
(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 <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
29-Jun-2023
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
5-Jan-2022
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
INA146UA/2K5
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
5-Jan-2022
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SOIC
SPQ
Length (mm) Width (mm) Height (mm)
367.0 367.0 35.0
INA146UA/2K5
D
8
2500
Pack Materials-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
5-Jan-2022
TUBE
*All dimensions are nominal
Device
Package Name Package Type
Pins
SPQ
L (mm)
W (mm)
T (µm)
B (mm)
INA146UA
D
D
SOIC
SOIC
8
8
75
75
506.6
506.6
8
8
3940
3940
4.32
4.32
INA146UAE4
Pack Materials-Page 3
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IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
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TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable
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Copyright © 2023, Texas Instruments Incorporated
相关型号：
INA146UA/2K5E4
INSTRUMENTATION AMPLIFIER, 5000uV OFFSET-MAX, 0.05MHz BAND WIDTH, PDSO8, ROHS COMPLIANT, SOP-8
TI
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