RS
A1
A2
RL
Load
VIN+
-16Vto+80V
+2.7Vto+18V
Negative
and
Positive
Common-Mode
Voltage
VIN+ VIN-
V+
IS
OUT
INA193-INA198
R1R1
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
CURRENT SHUNT MONITOR
16V to +80V Common-Mode Range
Check for Samples: INA193,INA194,INA195,INA196,INA197,INA198
1FEATURES DESCRIPTION
2 WIDE COMMON-MODE VOLTAGE: The INA193INA198 family of current shunt monitors
16V to +80V with voltage output can sense drops across shunts at
common-mode voltages from 16V to +80V,
LOW ERROR: 3.0% Over Temp (max) independent of the INA19x supply voltage. They are
BANDWIDTH: Up to 500kHz available with three output voltage scales: 20V/V,
THREE TRANSFER FUNCTIONS AVAILABLE: 50V/V, and 100V/V. The 500kHz bandwidth simplifies
20V/V, 50V/V, and 100V/V use in current control loops. The INA193INA195
provide identical functions but alternative pin
QUIESCENT CURRENT: 900mA (max) configurations to the INA196INA198, respectively.
COMPLETE CURRENT SENSE SOLUTION The INA193INA198 operate from a single +2.7V to
+18V supply, drawing a maximum of 900mA of supply
APPLICATIONS current. They are specified over the extended
WELDING EQUIPMENT operating temperature range (40°C to +125°C), and
NOTEBOOK COMPUTERS are offered in a space-saving SOT23 package.
CELL PHONES MODEL GAIN PACKAGE PINOUT(1)
TELECOM EQUIPMENT INA193 20V/V SOT23-5 Pinout #1
AUTOMOTIVE INA194 50V/V SOT23-5 Pinout #1
POWER MANAGEMENT INA195 100V/V SOT23-5 Pinout #1
BATTERY CHARGERS INA196 20V/V SOT23-5 Pinout #2
INA197 50V/V SOT23-5 Pinout #2
INA198 100V/V SOT23-5 Pinout #2
(1) See Pin Assignments for Pinout #1 and Pinout #2.
1
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.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 2004–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
OUT
GND
VIN+
V+
VIN-
1
2
3
5
4
Pinout#1
OUT
GND
V+
VIN-
VIN+
1
2
3
5
4
Pinout#2
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
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.
PACKAGE INFORMATION(1)
PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR PACKAGE MARKING
INA193 SOT23-5 DBV BJJ
INA194 SOT23-5 DBV BJI
INA195 SOT23-5 DBV BJK
INA196 SOT23-5 DBV BJE
INA197 SOT23-5 DBV BJH
INA198 SOT23-5 DBV BJL
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
INA19x UNIT
Supply Voltage +18 V
Analog Inputs, VIN+, VIN–18 to +18 V
Differential (VIN+) (VIN)
Common-Mode(2) –16 to +80 V
Analog Output, Out(2) GND 0.3 to (V+) + 0.3 V
Input Current Into Any Pin(2) 5 mA
Operating Temperature –55 to +150 °C
Storage Temperature –65 to +150 °C
Junction Temperature +150 °C
Human Body Model (HBM) 4000 V
ESD Ratings Charged-Device Model (CDM) 1000 V
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those specified is not supported.
(2) Input voltage at any pin may exceed the voltage shown if the current at that pin is limited to 5mA.
PIN ASSIGNMENTS
DBV PACKAGE DBV PACKAGE
INA193, INA194, INA195 INA196, INA197, INA198
(TOP VIEW) (TOP VIEW)
2Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
ELECTRICAL CHARACTERISTICS: VS= +12V
Boldface limits apply over the specified temperature range, TA=40°C to +125°C.
All specifications at TA= +25°C, VS= +12V, VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
INA193, INA194, INA195, INA196, INA197, INA198
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
Full-Scale Input Voltage VSENSE VSENSE = VIN+ VIN0.15 (VS 0.2)/Gain V
Common-Mode Input Range VCM –16 80 V
Common-Mode Rejection CMR VIN+ =16V to +80V 80 94 dB
Over Temperature VIN+ = +12V to +80V 100 120 dB
Offset Voltage, RTI VOS ±0.5 2 mV
Over Temperature 0.5 3 mV
vs Temperature dVOS/dT 2.5 mV/°C
vs Power Supply PSR VS= +2.7V to +18V, VIN+ = +18V 5 100 mV/V
Input Bias Current, VINpin IB±8 ±16 mA
OUTPUT (VSENSE 20mV)
Gain: INA193, INA196 G 20 V/V
Gain: INA194, INA197 50 V/V
Gain: INA195, INA198 100 V/V
Gain Error VSENSE = 20mV to 100mV, TA= +25°C ±0.2 ±1 %
Over Temperature VSENSE = 20mV to 100mV ±2 %
Total Output Error(1) VSENSE = 100mV ±0.75 ±2.2 %
Over Temperature ±1 ±3 %
Nonlinearity Error VSENSE = 20mV to 100mV ±0.002 ±0.1 %
Output Impedance RO1.5 Ω
Maximum Capacitive Load No Sustained Oscillation 10 nF
OUTPUT (VSENSE < 20mV)(2)
All Devices 16V VCM < 0V 300 mV
INA193, INA196 0V VCM VS, VS= 5V 0.4 V
INA194, INA197 0V VCM VS, VS= 5V 1 V
INA195, INA198 0V VCM VS, VS= 5V 2 V
All Devices VS< VCM 80V 300 mV
VOLTAGE OUTPUT(3) RL= 100kΩto GND
Swing to V+ Power-Supply Rail (V+) 0.1 (V+) 0.2 V
Swing to GND(4) (VGND) + 3 (VGND) + 50 mV
FREQUENCY RESPONSE
Bandwidth, INA193, INA196 BW CLOAD = 5pF 500 kHz
Bandwidth, INA194, INA197 CLOAD = 5pF 300 kHz
Bandwidth, INA195, INA198 CLOAD = 5pF 200 kHz
Phase Margin CLOAD < 10nF 40 degrees
Slew Rate SR 1 V/ms
Settling Time (1%) tSVSENSE = 10mV to 100mVPP, CLOAD = 5pF 2 ms
NOISE, RTI
Voltage Noise Density 40 nV/Hz
(1) Total output error includes effects of gain error and VOS.
(2) For details on this region of operation, see the Accuracy Variations section in the Applications Information.
(3) See Typical Characteristic curve Output Swing vs Output Current,Figure 7.
(4) Specified by design.
Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
ELECTRICAL CHARACTERISTICS: VS= +12V (continued)
Boldface limits apply over the specified temperature range, TA=40°C to +125°C.
All specifications at TA= +25°C, VS= +12V, VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
INA193, INA194, INA195, INA196, INA197, INA198
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLY
Operating Range VS+2.7 +18 V
Quiescent Current IQVOUT = 2V 700 900 mA
Over Temperature VSENSE = 0mV 370 950 mA
TEMPERATURE RANGE
Specified Temperature Range –40 +125 °C
Operating Temperature Range –55 +150 °C
Storage Temperature Range –65 +150 °C
Thermal Resistance, SOT23 qJA 200 °C/W
4Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
45
40
35
30
25
20
15
10
5
10k 100k
Gain(dB)
Frequency(Hz)
1M
G=100 C =1000pF
LOAD
G=50
G=20
45
40
35
30
25
20
15
10
5
10k 100k
Gain(dB)
Frequency(Hz)
1M
G=100
G=50
G=20
20
18
16
14
12
10
8
6
4
2
0
20 100 200 300 400 500 600 700
V (V)
OUT
V (mV)
DIFFERENTIAL
800 900
50V/V
20V/V
100V/V
140
130
120
110
100
90
80
70
60
50
40
10 100 1k 10k
Common-Modeand
Power-SupplyRejection(dB)
Frequency(Hz)
100k
CMR
PSR
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
050 100 150 200 250 300 350
OutputError
(%erroroftheidealoutputvalue)
V (mV)
SENSE
400 450 500
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
-16 -12 -8-4 0 4 128 2016
OutputError(%)
Common-ModeVoltage(V)
... 76 80
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
TYPICAL CHARACTERISTICS
All specifications at TA= +25°C, VS= +12V, and VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
GAIN vs FREQUENCY GAIN vs FREQUENCY
Figure 1. Figure 2.
COMMON-MODE AND POWER-SUPPLY REJECTION
GAIN PLOT vs FREQUENCY
Figure 3. Figure 4.
OUTPUT ERROR vs VSENSE OUTPUT ERROR vs COMMON-MODE VOLTAGE
Figure 5. Figure 6.
Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
12
11
10
9
8
7
6
5
4
3
2
1
0
0510 15 20
OutputVoltage(V)
OutputCurrent(mA)
25 30
V =12V
S
+25 C°
+25 C°
-40°C
-40°C
+125 C°
+125 C°
SourcingCurrent
V =3V
S
SourcingCurrent
Outputstageisdesigned
tosourcecurrent.Current
sinkingcapabilityis
approximately400 A.m
34
30
26
22
18
14
10
6
2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5
OutputShort-CircuitCurrent(mA)
SupplyVoltage(V)
11.5 17 18
- °40 C
+ °25 C
+125 C°
875
775
675
575
475
375
275
175
-16 -12 -8-4 0 4 8 12 16 20
I ( A)m
Q
V (V)
CM
76 80
V =0mV:
SENSE
V =12V
S
V =2.7V
S
V =100mV:
SENSE V =12V
SV =2.7V
S
...
OutputVoltage(50mV/div)
Time(2 s/div)m
G=20
V =10mVto20mV
SENSE
Time(2ms/div)
G=20
OutputVoltage(500mV/div)
V =10mVto100mV
SENSE
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
TYPICAL CHARACTERISTICS (continued)
All specifications at TA= +25°C, VS= +12V, and VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
POSITIVE OUTPUT VOLTAGE SWING
vs OUTPUT CURRENT QUIESCENT CURRENT vs OUTPUT VOLTAGE
Figure 7. Figure 8.
QUIESCENT CURRENT OUTPUT SHORT-CIRCUIT CURRENT
vs COMMON-MODE VOLTAGE vs SUPPLY VOLTAGE
Figure 9. Figure 10.
STEP RESPONSE STEP RESPONSE
Figure 11. Figure 12.
6Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
Time(2 s/div)m
G=20
OutputVoltage(50mV/div)
V =90mVto100mV
SENSE
Time(5 s/div)m
G=50
OutputVoltage(100mV/div)
V =10mVto20mV
SENSE
Time(5 s/div)m
G=50
OutputVoltage(1V/div)
V =10mVto100mV
SENSE
Time(5 s/div)m
G=50
OutputVoltage(100mV/div)
V =90mVto100mV
SENSE
Time(10 s/div)m
G=100
OutputVoltage(2V/div)
V =10mVto100mV
SENSE
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
TYPICAL CHARACTERISTICS (continued)
All specifications at TA= +25°C, VS= +12V, and VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
STEP RESPONSE STEP RESPONSE
Figure 13. Figure 14.
STEP RESPONSE STEP RESPONSE
Figure 15. Figure 16.
STEP RESPONSE
Figure 17.
Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
G= V V
OUT1 OUT2
-
100mV 20mV-
RS
Load
VIN+
-16Vto+80V
IS
VIN+ VIN-
+2.7Vto+18V
V+
OUT
INA193-INA198
R1
RL
R2
V RTI(Referred-To-Input)=
OS
VOUT1
G-100mV
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
APPLICATIONS INFORMATION
BASIC CONNECTION ACCURACY VARIATIONS AS A RESULT OF
VSENSE AND COMMON-MODE VOLTAGE
Figure 18 shows the basic connection of the
INA193-INA198. The input pins, VIN+ and VIN, should The accuracy of the INA193INA198 current shunt
be connected as closely as possible to the shunt monitors is a function of two main variables: VSENSE
resistor to minimize any resistance in series with the (VIN+ VIN) and common-mode voltage, VCM, relative
shunt resistance. to the supply voltage, VS. VCM is expressed as (VIN+ +
VIN)/2; however, in practice, VCM is seen as the
Power-supply bypass capacitors are required for voltage at VIN+ because the voltage drop across
stability. Applications with noisy or high impedance VSENSE is usually small.
power supplies may require additional decoupling
capacitors to reject power-supply noise. Connect This section addresses the accuracy of these specific
bypass capacitors close to the device pins. operating regions:
Normal Case 1: VSENSE 20mV, VCM VS
Normal Case 2: VSENSE 20mV, VCM < VS
Low VSENSE Case 1: VSENSE < 20mV, 16V VCM
< 0
Low VSENSE Case 2: VSENSE < 20mV, 0V VCM
VS
Low VSENSE Case 3: VSENSE < 20mV, VS< VCM
80V
Normal Case 1: VSENSE 20mV, VCM VS
This region of operation provides the highest
accuracy. Here, the input offset voltage is
characterized and measured using a two-step
method. First, the gain is determined by Equation 1.
where:
VOUT1 = Output Voltage with VSENSE = 100mV
VOUT2 = Output Voltage with VSENSE = 20mV (1)
Then the offset voltage is measured at VSENSE =
100mV and referred to the input (RTI) of the current
shunt monitor, as shown in Equation 2.
Figure 18. INA193-INA198 Basic Connection (2)
In the Typical Characteristics, the Output Error vs
POWER SUPPLY Common-Mode Voltage curve (Figure 6) shows the
highest accuracy for this region of operation. In this
The input circuitry of the INA193-INA198 can plot, VS= 12V; for VCM 12V, the output error is at its
accurately measure beyond its power-supply voltage, minimum. This case is also used to create the VSENSE
V+. For example, the V+ power supply can be 5V, 20mV output specifications in the Electrical
whereas the load power-supply voltage is up to +80V. Characteristics table.
The output voltage range of the OUT terminal,
however, is limited by the voltages on the
power-supply pin.
8Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
024 6 8 10 12 14 16 18 20 22
V (V)
OUT
V (mV)
SENSE
24
INA195,INA198V TestedLimit
OUT
(1)
VCM2
VCM3
VCM4
V ,V ,andV
CM2 CM3 CM4 illustratethevariance
fromparttopartoftheV thatcancause
CM
maximumVOUT SENSE
withV <20mV.
V testedlimitat
OUT
V =0mV,0 V£
SENSE CM1 S
V£.
Ideal
VCM1
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
024 6 8 10 12 14 16 18
V (V)
OUT
V (mV)
SENSE
20
Actual
Ideal
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
Normal Case 2: VSENSE 20mV, VCM < VSLow VSENSE Case 2: VSENSE < 20mV, 0V VCM VS
This region of operation has slightly less accuracy This region of operation is the least accurate for the
than Normal Case 1 as a result of the common-mode INA193INA198 family. To achieve the wide input
operating area in which the part functions, as seen in common-mode voltage range, these devices use two
the Output Error vs Common-Mode Voltage curve op amp front ends in parallel. One op amp front end
(Figure 6). As noted, for this graph VS= 12V; for VCM operates in the positive input common-mode voltage
< 12V, the Output Error increases as VCM becomes range, and the other in the negative input region. For
less than 12V, with a typical maximum error of this case, neither of these two internal amplifiers
0.005% at the most negative VCM =16V. dominates and overall loop gain is very low. Within
this region, VOUT approaches voltages close to linear
Low VSENSE Case 1: operation levels for Normal Case 2. This deviation
VSENSE < 20mV, 16V VCM < 0; from linear operation becomes greatest the closer
and Low VSENSE Case 3: VSENSE approaches 0V. Within this region, as VSENSE
VSENSE < 20mV, VS< VCM 80V approaches 20mV, device operation is closer to that
described by Normal Case 2. Figure 20 illustrates this
Although the INA193INA198 family of devices are behavior for the INA195. The VOUT maximum peak for
not designed for accurate operation in either of these this case is tested by maintaining a constant VS,
regions, some applications are exposed to these setting VSENSE = 0mV and sweeping VCM from 0V to
conditions; for example, when monitoring power VS. The exact VCM at which VOUT peaks during this
supplies that are switched on and off while VSis still test varies from part to part, but the VOUT maximum
applied to the INA193INA198. It is important to know peak is tested to be less than the specified VOUT
what the behavior of the devices will be in these Tested Limit.
regions.
As VSENSE approaches 0mV, in these VCM regions,
the device output accuracy degrades. A
larger-than-normal offset can appear at the current
shunt monitor output with a typical maximum value of
VOUT = 300mV for VSENSE = 0mV. As VSENSE
approaches 20mV, VOUT returns to the expected
output value with accuracy as specified in the
Electrical Characteristics.Figure 19 illustrates this
effect using the INA195 and INA198 (Gain = 100).
(1) INA193, INA196 VOUT Tested Limit = 0.4V. INA194, INA197
VOUT Tested Limit = 1V.
Figure 20. Example for Low VSENSE Case 2
(INA195, INA198: Gain = 100)
Figure 19. Example for Low VSENSE Cases 1 and 3
(INA195, INA198: Gain = 100)
Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
RS
A1
0.1 Fm
V+>3V
A2
RL
Load
VIN+
-16Vto+80V
Negative
and
Positive
Common-Mode
Voltage
VIN+ VIN-V+
IL
OUT
INA193-INA198
R1R2
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
SHUTDOWN voltage loss in the measurement line. High values of
RSprovide better accuracy at lower currents by
Because the INA193-INA198 consume a quiescent minimizing the effects of offset, while low values of
current less than 1mA, they can be powered by either RSminimize voltage loss in the supply line. For most
the output of logic gates or by transistor switches to applications, best performance is attained with an RS
supply power. Use a totem-pole output buffer or gate value that provides a full-scale shunt voltage range of
that can provide sufficient drive along with 0.1mF50mV to 100mV. Maximum input voltage for accurate
bypass capacitor, preferably ceramic with good measurements is 500mV.
high-frequency characteristics. This gate should have
a supply voltage of 3V or greater because the TRANSIENT PROTECTION
INA193-INA198 requires a minimum supply greater
than 2.7V. In addition to eliminating quiescent current, The 16V to +80V common-mode range of the
this gate also turns off the 10mA bias current present INA193-INA198 is ideal for withstanding automotive
at each of the inputs. An example shutdown circuit is fault conditions ranging from 12V battery reversal up
shown in Figure 21.to +80V transients, since no additional protective
components are needed up to those levels. In the
event that the INA193-INA198 is exposed to
transients on the inputs in excess of its ratings, then
external transient absorption with semiconductor
transient absorbers (zeners or Transzorbs) will be
necessary. Use of MOVs or VDRs is not
recommended except when they are used in addition
to a semiconductor transient absorber. Select the
transient absorber such that it will never allow the
INA193-INA198 to be exposed to transients greater
than +80V (that is, allow for transient absorber
tolerance, as well as additional voltage due to
transient absorber dynamic impedance). Despite the
use of internal zener-type ESD protection, the
INA193-INA198 does not lend itself to using external
resistors in series with the inputs because the internal
gain resistors can vary up to ±30%. (If gain accuracy
is not important, then resistors can be added in series
with the INA193-INA198 inputs with two equal
resistors on each input.)
OUTPUT VOLTAGE RANGE
The output of the INA193-INA198 is accurate within
the output voltage swing range set by the
Figure 21. INA193-INA198 Example Shutdown power-supply pin, V+. This is best illustrated when
Circuit using the INA195 or INA198 (which are both versions
using a gain of 100), where a 100mV full-scale input
from the shunt resistor requires an output voltage
SELECTING RSswing of +10V, and a power-supply voltage sufficient
to achieve +10V on the output.
The value chosen for the shunt resistor, RS, depends
on the application and is a compromise between
small-signal accuracy and maximum permissible
10 Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
LOAD
VSUPPLY
f-3dB =
f-3dB
1
2 (2R )CpFILT FILT
CFILT
R << R
SHUNT FILTER
R <100W
FILT R <100W
FILT
VIN+ VIN-
+5V
V+
OUT
INA193-INA198
R1
5kW
RL
R1
5kW
GainError%=100 -5kW
5k +RWFILT
´100
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
RFI/EMI Note that the specified accuracy of the
INA193-INA198 must then be combined in addition to
Attention to good layout practices is always these tolerances. While this discussion treated
recommended. Keep traces short and, when accuracy worst-case conditions by combining the
possible, use a printed circuit board (PCB) ground extremes of the resistor values, it is appropriate to
plane with surface-mount components placed as use geometric mean or root sum square calculations
close to the device pins as possible. Small ceramic to total the effects of accuracy variations.
capacitors placed directly across amplifier inputs can
reduce RFI/EMI sensitivity. PCB layout should locate
the amplifier as far away as possible from RFI
sources. Sources can include other components in
the same system as the amplifier itself, such as
inductors (particularly switched inductors handling a
lot of current and at high frequencies). RFI can
generally be identified as a variation in offset voltage
or dc signal levels with changes in the interfering RF
signal. If the amplifier cannot be located away from
sources of radiation, shielding may be needed.
Twisting wire input leads makes them more resistant
to RF fields. The difference in input pin location of the
INA193-INA195 versus the INA196-INA198 may
provide different EMI performance.
INPUT FILTERING
An obvious and straightforward location for filtering is
at the output of the INA193-INA198; however, this
location negates the advantage of the low output
impedance of the internal buffer. The only other
option for filtering is at the input pins of the
INA193-INA198, which is complicated by the internal
5kΩ+ 30% input impedance; this is illustrated in
Figure 22. Using the lowest possible resistor values
minimizes both the initial shift in gain and effects of
tolerance. The effect on initial gain is given by
Equation 3:
(3) Figure 22. Input Filter (Gain Error 1.5% to
Total effect on gain error can be calculated by 2.2%)
replacing the 5kΩterm with 5kΩ 30%, (or 3.5kΩ) or
5kΩ+ 30% (or 6.5kΩ). The tolerance extremes of
RFILT can also be inserted into the equation. If a pair
of 100Ω1% resistors are used on the inputs, the
initial gain error will be approximately 2%. Worst-case
tolerance conditions will always occur at the lower
excursion of the internal 5kΩresistor (3.5kΩ), and the
higher excursion of RFILT 3% in this case.
Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
RS
A1
A2
R(1)
L
Load
VIN+
Negative
and
Positive
Common-Mode
Voltage
VIN+ VIN-
V+
IS
OUT
INA193-INA198
R1
(1)
5kW
G=20,R =100kW
L
G=50,R =250kW
L
G=100,R =500kW
L
R1
(1)
5kW
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
INSIDE THE INA193-INA198 The differential input voltage, (VIN+)(VIN) applied
across RS, is converted to a current through a
The INA193-INA198 uses a new, unique internal resistor. This current is converted back to a voltage
circuit topology that provides common-mode range through RL, and then amplified by the output buffer
extending from 16V to +80V while operating from a amplifier. When the common-mode voltage is
single power supply. The common-mode rejection in negative, amplifier A1 is active. The differential input
a classic instrumentation amplifier approach is limited voltage, (VIN+)(VIN) applied across RS, is
by the requirement for accurate resistor matching. By converted to a current through a resistor. This current
converting the induced input voltage to a current, the is sourced from a precision current mirror whose
INA193-INA198 provides common-mode rejection output is directed into RLconverting the signal back
that is no longer a function of closely matched into a voltage and amplified by the output buffer
resistor values, providing the enhanced performance amplifier. Patent-pending circuit architecture ensures
necessary for such a wide common-mode range. A smooth device operation, even during the transition
simplified diagram (shown in Figure 23) shows the period where both amplifiers A1 and A2 are active.
basic circuit function. When the common-mode
voltage is positive, amplifier A2 is active.
(1) Nominal resistor values are shown. ±15% variation is possible. Resistor ratios are matched to ±1%.
Figure 23. INA193-INA198 Simplified Circuit Diagram
12 Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
LOAD
+12V
LOAD
GND
-12V
+5V
RSHUNT
I1
OUT
for
+12V
Common-Mode
INA193-INA198
VIN+ VIN-V+
INA193-INA198
V+
VIN+ VIN-GND
OUT
for
-12V
Common-Mode
RSHUNT
I2
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
Figure 24. Monitor Bipolar Output Power-Supply Current
Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
LOAD
VSUPPLY
RSHUNT
40kW
40kW
40kW
40kW
INA152
+5V
VOUT
+2.5V
VREF
VIN+ VIN-V+ V+
+5V
OUT OUT
INA193-INA198
VIN+ VIN-
+5V
INA193-INA198
RSHUNT
Solenoid
Upto+80V
+2.7Vto+18V
OUT
V+
VIN+ VIN-
INA193-INA198
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
Figure 25. Bi-Directional Current Monitoring
Figure 26. Inductive Current Monitor Including Flyback
14 Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
R1
R2REF
1.25V
Internal
Reference
Foroutput
signals>comparatortrip-point.
(a) INA193-INA198outputadjustedbyvoltagedivider.
TLV3012
REF
1.25V
Internal
Reference
R1
R2Forusewith
smalloutputsignals.
(b) Comparatorreferencevoltageadjustedbyvoltagedivider.
TLV3012
OUT
VIN+ VIN-V+
INA193-INA198
OUT
VIN+ VIN-V+
INA193-INA198
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F MAY 2004REVISED FEBRUARY 2010
Figure 27. INA193-INA198 With Comparator
Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback 15
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F MAY 2004REVISED FEBRUARY 2010
www.ti.com
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (August 2006) to Revision F Page
Updated document format to current standards ................................................................................................................... 1
Added test conditions to Output, Total Output Error parameter in Electrical Characteristics: VS= +12V ............................ 3
16 Submit Documentation Feedback Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
PACKAGE OPTION ADDENDUM
www.ti.com 20-Aug-2011
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
INA193AIDBVR ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA193AIDBVRG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA193AIDBVT ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA193AIDBVTG4 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA194AIDBVR ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA194AIDBVRG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA194AIDBVT ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA194AIDBVTG4 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA195AIDBVR ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA195AIDBVRG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA195AIDBVT ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA195AIDBVTG4 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA196AIDBVR ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA196AIDBVRG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA196AIDBVT ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA196AIDBVTG4 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA197AIDBVR ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
PACKAGE OPTION ADDENDUM
www.ti.com 20-Aug-2011
Addendum-Page 2
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
INA197AIDBVRG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA197AIDBVT ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA197AIDBVTG4 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA198AIDBVR ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA198AIDBVRG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA198AIDBVT ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
INA198AIDBVTG4 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
(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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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.
PACKAGE OPTION ADDENDUM
www.ti.com 20-Aug-2011
Addendum-Page 3
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.