TI INA193AIDBVRG4

INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
CURRENT SHUNT MONITOR
−16V to +80V Common-Mode Range
Check for Samples: INA193, INA194, INA195, INA196, INA197, INA198
FEATURES
DESCRIPTION
•
The INA193−INA198 family of current shunt monitors
with voltage output can sense drops across shunts at
common-mode voltages from −16V to +80V,
independent of the INA19x supply voltage. They are
available with three output voltage scales: 20V/V,
50V/V, and 100V/V. The 500kHz bandwidth simplifies
use in current control loops. The INA193−INA195
provide identical functions but alternative pin
configurations to the INA196−INA198, respectively.
1
2
•
•
•
•
•
WIDE COMMON-MODE VOLTAGE:
−16V to +80V
LOW ERROR: 3.0% Over Temp (max)
BANDWIDTH: Up to 500kHz
THREE TRANSFER FUNCTIONS AVAILABLE:
20V/V, 50V/V, and 100V/V
QUIESCENT CURRENT: 900mA (max)
COMPLETE CURRENT SENSE SOLUTION
The INA193−INA198 operate from a single +2.7V to
+18V supply, drawing a maximum of 900mA of supply
current. They are specified over the extended
operating temperature range (−40°C to +125°C), and
are offered in a space-saving SOT23 package.
APPLICATIONS
•
•
•
•
•
•
•
WELDING EQUIPMENT
NOTEBOOK COMPUTERS
CELL PHONES
TELECOM EQUIPMENT
AUTOMOTIVE
POWER MANAGEMENT
BATTERY CHARGERS
VIN+
-16V to +80V
Negative
and
Positive
Common-Mode
Voltage
IS
RS
V+
+2.7V to +18V
VIN+
VIN-
R1
R1
MODEL
GAIN
PACKAGE
PINOUT(1)
INA193
20V/V
SOT23-5
Pinout #1
INA194
50V/V
SOT23-5
Pinout #1
INA195
100V/V
SOT23-5
Pinout #1
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.
Load
A1
A2
OUT
INA193-INA198
RL
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 © 2004–2010, Texas Instruments Incorporated
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F – MAY 2004 – REVISED 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)
(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
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
+18
V
–18 to +18
V
–16 to +80
V
Supply Voltage
Analog Inputs, VIN+, VIN−
Differential (VIN+) – (VIN−)
Common-Mode (2)
Analog Output, Out (2)
GND – 0.3 to (V+) + 0.3
V
5
mA
Operating Temperature
–55 to +150
°C
Storage Temperature
–65 to +150
°C
Junction Temperature
+150
°C
Human Body Model (HBM)
4000
V
Charged-Device Model (CDM)
1000
V
Input Current Into Any Pin (2)
ESD Ratings
(1)
(2)
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.
Input voltage at any pin may exceed the voltage shown if the current at that pin is limited to 5mA.
PIN ASSIGNMENTS
DBV PACKAGE
INA193, INA194, INA195
(TOP VIEW)
OUT
1
GND
2
VIN+
3
Pinout #1
2
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DBV PACKAGE
INA196, INA197, INA198
(TOP VIEW)
5
V+
4
VIN-
OUT
1
GND
2
V+
3
5
VIN-
4
VIN+
Pinout #2
Copyright © 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
INA193, INA194
INA195, INA196
INA197, INA198
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SBOS307F – MAY 2004 – REVISED 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
0.15
(VS – 0.2)/Gain
V
INPUT
Full-Scale Input Voltage
Common-Mode Input Range
Common-Mode Rejection
VSENSE = VIN+ − VIN−
VSENSE
VCM
–16
CMR
Over Temperature
Offset Voltage, RTI
VIN+ = −16V to +80V
80
VIN+ = +12V to +80V
100
VOS
Over Temperature
vs Temperature
vs Power Supply
Input Bias Current, VIN− pin
dVOS/dT
PSR
80
V
94
dB
120
dB
±0.5
2
0.5
3
mV
mV
2.5
VS = +2.7V to +18V, VIN+ = +18V
mV/°C
5
100
mV/V
IB
±8
±16
mA
G
OUTPUT (VSENSE ≥ 20mV)
Gain: INA193, INA196
20
V/V
Gain: INA194, INA197
50
V/V
Gain: INA195, INA198
100
Gain Error
VSENSE = 20mV to 100mV, TA = +25°C
Over Temperature
VSENSE = 100mV
Over Temperature
Nonlinearity Error
VSENSE = 20mV to 100mV
%
±2
%
±0.75
±2.2
%
±1
±3
%
±0.002
±0.1
%
1.5
Ω
No Sustained Oscillation
10
nF
−16V ≤ VCM < 0V
300
RO
Maximum Capacitive Load
V/V
±1
VSENSE = 20mV to 100mV
Total Output Error (1)
Output Impedance
±0.2
OUTPUT (VSENSE < 20mV) (2)
All Devices
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
VS < VCM ≤ 80V
All Devices
VOLTAGE OUTPUT (3)
V
300
mV
RL = 100kΩ to 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
CLOAD = 5pF
500
kHz
Bandwidth, INA194, INA197
CLOAD = 5pF
300
kHz
Bandwidth, INA195, INA198
CLOAD = 5pF
200
kHz
Phase Margin
CLOAD < 10nF
40
degrees
1
V/ms
2
ms
40
nV/√Hz
Slew Rate
Settling Time (1%)
BW
SR
tS
VSENSE = 10mV to 100mVPP, CLOAD = 5pF
NOISE, RTI
Voltage Noise Density
(1)
(2)
(3)
(4)
Total output error includes effects of gain error and VOS.
For details on this region of operation, see the Accuracy Variations section in the Applications Information.
See Typical Characteristic curve Output Swing vs Output Current, Figure 7.
Specified by design.
Copyright © 2004–2010, Texas Instruments Incorporated
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INA195, INA196
INA197, INA198
SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
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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
Quiescent Current
IQ
Over Temperature
+18
V
VOUT = 2V
+2.7
700
900
mA
VSENSE = 0mV
370
950
mA
TEMPERATURE RANGE
Specified Temperature Range
–40
+125
°C
Operating Temperature Range
–55
+150
°C
Storage Temperature Range
–65
+150
Thermal Resistance, SOT23
4
qJA
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200
°C
°C/W
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 2004 – REVISED FEBRUARY 2010
TYPICAL CHARACTERISTICS
All specifications at TA = +25°C, VS = +12V, and VIN+ = 12V, and VSENSE = 100mV, unless otherwise noted.
GAIN vs FREQUENCY
45
G = 50
35
Gain (dB)
30
G = 100
40
G = 50
35
Gain (dB)
CLOAD = 1000pF
G = 100
40
GAIN vs FREQUENCY
45
G = 20
25
20
30
20
15
15
10
10
5
G = 20
25
5
10k
100k
10k
1M
100k
Frequency (Hz)
Frequency (Hz)
Figure 1.
Figure 2.
GAIN PLOT
COMMON-MODE AND POWER-SUPPLY REJECTION
vs FREQUENCY
20
140
18
130
Common- Mode and
Power- Supply Rejection (dB)
100V/V
16
VOUT (V)
14
50V/V
12
10
8
20V/V
6
4
120
CMR
110
100
90
PSR
80
70
60
50
2
40
0
20
100
200
300
400
500
600
700
800
900
10
100
1k
VDIFFERENTIAL (mV)
10k
100k
Frequency (Hz)
Figure 3.
Figure 4.
OUTPUT ERROR vs VSENSE
OUTPUT ERROR vs COMMON-MODE VOLTAGE
4.0
0.1
3.5
0.09
0.08
3.0
Output Error (%)
Output Error
(% error of the ideal output value)
1M
2.5
2.0
1.5
1.0
0.07
0.06
0.05
0.04
0.03
0.02
0.5
0.01
0
0
50
100 150
200
250 300
350 400 450 500
VSENSE (mV)
Figure 5.
Copyright © 2004–2010, Texas Instruments Incorporated
0
-16 -12 -8 -4
0
4
8
12 16 20
...
76 80
Common-Mode Voltage (V)
Figure 6.
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INA195, INA196
INA197, INA198
SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
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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
12
1000
11
10
Sourcing Current
9
800
+25°C
8
700
+125°C
7
6
-40°C
IQ (mA)
Output Voltage (V)
900
VS = 12V
VS = 3V
5
Sourcing Current
+25°C
4
3
2
1
+125°C
0
0
500
400
300
Output stage is designed
to source current. Current
sinking capability is
approximately 400mA.
-40°C
600
200
100
0
5
10
20
15
25
30
2
1
0
Output Current (mA)
8
QUIESCENT CURRENT
vs COMMON-MODE VOLTAGE
OUTPUT SHORT-CIRCUIT CURRENT
vs SUPPLY VOLTAGE
34
VSENSE = 100mV:
VS = 12V
VS = 2.7V
575
475
VS = 12V
VSENSE = 0mV:
VS = 2.7V
275
9
10
-40°C
30
+25°C
26
+125°C
22
18
14
10
6
175
-16 -12 -8 -4
0
4
8
12 16
20
...
2.5 3.5
76 80
4.5
5.5 6.5
7.5
8.5
9.5 10.5 11.5 17
18
Supply Voltage (V)
VCM (V)
Figure 9.
Figure 10.
STEP RESPONSE
STEP RESPONSE
G = 20
G = 20
Output Voltage (500mV/div)
Output Voltage (50mV/div)
VSENSE = 10mV to 20mV
Time (2ms/div)
Figure 11.
6
7
6
Output Voltage (V)
675
IQ (mA)
5
Figure 8.
775
375
4
Figure 7.
Output Short-Circuit Current (mA)
875
3
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VSENSE = 10mV to 100mV
Time (2ms/div)
Figure 12.
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 2004 – REVISED 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
G = 50
Output Voltage (50mV/div)
Output Voltage (100mV/div)
G = 20
VSENSE = 90mV to 100mV
VSENSE = 10mV to 20mV
Time (2ms/div)
Time (5ms/div)
Figure 13.
Figure 14.
STEP RESPONSE
STEP RESPONSE
G = 50
Output Voltage (1V/div)
Output Voltage (100mV/div)
G = 50
VSENSE = 10mV to 100mV
VSENSE = 90mV to 100mV
Time (5ms/div)
Time (5ms/div)
Figure 15.
Figure 16.
STEP RESPONSE
Output Voltage (2V/div)
G = 100
VSENSE = 10mV to 100mV
Time (10ms/div)
Figure 17.
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SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
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APPLICATIONS INFORMATION
BASIC CONNECTION
Figure 18 shows the basic connection of the
INA193-INA198. The input pins, VIN+ and VIN−, should
be connected as closely as possible to the shunt
resistor to minimize any resistance in series with the
shunt resistance.
Power-supply bypass capacitors are required for
stability. Applications with noisy or high impedance
power supplies may require additional decoupling
capacitors to reject power-supply noise. Connect
bypass capacitors close to the device pins.
VIN+
-16V to +80V
RS
IS
V+
+2.7V to +18V
VIN+
VIN-
R1
R2
Load
ACCURACY VARIATIONS AS A RESULT OF
VSENSE AND COMMON-MODE VOLTAGE
The accuracy of the INA193−INA198 current shunt
monitors is a function of two main variables: VSENSE
(VIN+ − VIN−) and common-mode voltage, VCM, relative
to the supply voltage, VS. VCM is expressed as (VIN+ +
VIN−)/2; however, in practice, VCM is seen as the
voltage at VIN+ because the voltage drop across
VSENSE is usually small.
This section addresses the accuracy of these specific
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.
VOUT1 - VOUT2
G=
100mV - 20mV
OUT
INA193-INA198
RL
Figure 18. INA193-INA198 Basic Connection
POWER SUPPLY
The input circuitry of the INA193-INA198 can
accurately measure beyond its power-supply voltage,
V+. For example, the V+ power supply can be 5V,
whereas the load power-supply voltage is up to +80V.
The output voltage range of the OUT terminal,
however, is limited by the voltages on the
power-supply pin.
8
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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.
VOUT1
VOSRTI (Referred-To-Input) =
- 100mV
G
(2)
In the Typical Characteristics, the Output Error vs
Common-Mode Voltage curve (Figure 6) shows the
highest accuracy for this region of operation. In this
plot, VS = 12V; for VCM ≥ 12V, the output error is at its
minimum. This case is also used to create the VSENSE
≥ 20mV output specifications in the Electrical
Characteristics table.
Copyright © 2004–2010, Texas Instruments Incorporated
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SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
Normal Case 2: VSENSE ≥ 20mV, VCM < VS
Low VSENSE Case 2: VSENSE < 20mV, 0V ≤ VCM ≤ VS
This region of operation has slightly less accuracy
than Normal Case 1 as a result of the common-mode
operating area in which the part functions, as seen in
the Output Error vs Common-Mode Voltage curve
(Figure 6). As noted, for this graph VS = 12V; for VCM
< 12V, the Output Error increases as VCM becomes
less than 12V, with a typical maximum error of
0.005% at the most negative VCM = −16V.
This region of operation is the least accurate for the
INA193−INA198 family. To achieve the wide input
common-mode voltage range, these devices use two
op amp front ends in parallel. One op amp front end
operates in the positive input common-mode voltage
range, and the other in the negative input region. For
this case, neither of these two internal amplifiers
dominates and overall loop gain is very low. Within
this region, VOUT approaches voltages close to linear
operation levels for Normal Case 2. This deviation
from linear operation becomes greatest the closer
VSENSE approaches 0V. Within this region, as VSENSE
approaches 20mV, device operation is closer to that
described by Normal Case 2. Figure 20 illustrates this
behavior for the INA195. The VOUT maximum peak for
this case is tested by maintaining a constant VS,
setting VSENSE = 0mV and sweeping VCM from 0V to
VS. The exact VCM at which VOUT peaks during this
test varies from part to part, but the VOUT maximum
peak is tested to be less than the specified VOUT
Tested Limit.
Although the INA193−INA198 family of devices are
not designed for accurate operation in either of these
regions, some applications are exposed to these
conditions; for example, when monitoring power
supplies that are switched on and off while VS is still
applied to the INA193−INA198. It is important to know
what the behavior of the devices will be in these
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).
INA195, INA198 VOUT Tested Limit
2.2
VCM1
Ideal
1.8
VCM2
1.6
1.4
VCM3
1.2
1.0
0.8
VOUT tested limit at
VSENSE = 0mV, 0 £ VCM1 £ VS.
VCM4
0.6
VCM2, VCM3, and VCM4 illustrate the variance
from part to part of the VCM that can cause
maximum VOUT with VSENSE < 20mV.
0.2
1.8
(1)
2.0
0.4
2.0
0
1.6
0
1.4
VOUT (V)
2.4
VOUT (V)
Low VSENSE Case 1:
VSENSE < 20mV, −16V ≤ VCM < 0;
and Low VSENSE Case 3:
VSENSE < 20mV, VS < VCM ≤ 80V
2
4
6
8
10
12
14
16
18
20
22
24
VSENSE (mV)
1.2
Actual
(1) INA193, INA196 VOUT Tested Limit = 0.4V. INA194, INA197
VOUT Tested Limit = 1V.
1.0
0.8
Figure 20. Example for Low VSENSE Case 2
(INA195, INA198: Gain = 100)
Ideal
0.6
0.4
0.2
0
0
2
4
6
8
10
12
14
16
18
20
VSENSE (mV)
Figure 19. Example for Low VSENSE Cases 1 and 3
(INA195, INA198: Gain = 100)
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SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
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SHUTDOWN
Because the INA193-INA198 consume a quiescent
current less than 1mA, they can be powered by either
the output of logic gates or by transistor switches to
supply power. Use a totem-pole output buffer or gate
that can provide sufficient drive along with 0.1mF
bypass capacitor, preferably ceramic with good
high-frequency characteristics. This gate should have
a supply voltage of 3V or greater because the
INA193-INA198 requires a minimum supply greater
than 2.7V. In addition to eliminating quiescent current,
this gate also turns off the 10mA bias current present
at each of the inputs. An example shutdown circuit is
shown in Figure 21.
Negative
and
Positive
Common-Mode
Voltage
IL
RS
VIN+
-16V to +80V
VIN+
VIN-
R1
R2
V+
Load
V+ > 3V
A1
0.1mF
A2
OUT
INA193-INA198
RL
Figure 21. INA193-INA198 Example Shutdown
Circuit
SELECTING RS
The value chosen for the shunt resistor, RS, depends
on the application and is a compromise between
small-signal accuracy and maximum permissible
10
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voltage loss in the measurement line. High values of
RS provide better accuracy at lower currents by
minimizing the effects of offset, while low values of
RS minimize voltage loss in the supply line. For most
applications, best performance is attained with an RS
value that provides a full-scale shunt voltage range of
50mV to 100mV. Maximum input voltage for accurate
measurements is 500mV.
TRANSIENT PROTECTION
The −16V to +80V common-mode range of the
INA193-INA198 is ideal for withstanding automotive
fault conditions ranging from 12V battery reversal up
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
power-supply pin, V+. This is best illustrated when
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
swing of +10V, and a power-supply voltage sufficient
to achieve +10V on the output.
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 2004 – REVISED FEBRUARY 2010
RFI/EMI
Note that the specified accuracy of the
INA193-INA198 must then be combined in addition to
these tolerances. While this discussion treated
accuracy worst-case conditions by combining the
extremes of the resistor values, it is appropriate to
use geometric mean or root sum square calculations
to total the effects of accuracy variations.
Attention to good layout practices is always
recommended. Keep traces short and, when
possible, use a printed circuit board (PCB) ground
plane with surface-mount components placed as
close to the device pins as possible. Small ceramic
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.
RSHUNT << RFILTER
LOAD
VSUPPLY
RFILT < 100W
RFILT < 100W
CFILT
f-3dB
1
2p (2 RFILT) CFILT
f-3dB =
+5V
VIN+
VIN-
R1
5kW
V+
R1
5kW
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:
GainError% = 100 -
5kW
5kW + RFILT
OUT
INA193-INA198
RL
´ 100
(3)
Total effect on gain error can be calculated by
replacing the 5kΩ term 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 100Ω 1% 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 5kΩ resistor (3.5kΩ), and the
higher excursion of RFILT − 3% in this case.
Copyright © 2004–2010, Texas Instruments Incorporated
Figure 22. Input Filter (Gain Error − 1.5% to
−2.2%)
Submit Documentation Feedback
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
11
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
www.ti.com
INSIDE THE INA193-INA198
The INA193-INA198 uses a new, unique internal
circuit topology that provides common-mode range
extending from −16V to +80V while operating from a
single power supply. The common-mode rejection in
a classic instrumentation amplifier approach is limited
by the requirement for accurate resistor matching. By
converting the induced input voltage to a current, the
INA193-INA198 provides common-mode rejection
that is no longer a function of closely matched
resistor values, providing the enhanced performance
necessary for such a wide common-mode range. A
simplified diagram (shown in Figure 23) shows the
basic circuit function. When the common-mode
voltage is positive, amplifier A2 is active.
The differential input voltage, (VIN+) − (VIN−) applied
across RS, is converted to a current through a
resistor. This current is converted back to a voltage
through RL, and then amplified by the output buffer
amplifier. When the common-mode voltage is
negative, amplifier A1 is active. The differential input
voltage, (VIN+) − (VIN−) applied across RS, is
converted to a current through a resistor. This current
is sourced from a precision current mirror whose
output is directed into RL converting the signal back
into a voltage and amplified by the output buffer
amplifier. Patent-pending circuit architecture ensures
smooth device operation, even during the transition
period where both amplifiers A1 and A2 are active.
IS
RS
VIN+
Negative
and
Positive
Common-Mode
Voltage
V+
VIN+
VIN(1)
Load
(1)
R1
5kW
R1
5kW
A1
A2
G = 20, RL = 100kW
G = 50, RL = 250kW
G = 100, RL = 500kW
INA193-INA198
OUT
(1)
RL
(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
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
RSHUNT
LOAD
+12V
I1
+5V
VIN+
VIN-
V+
V+
INA193-INA198
GND
INA193-INA198
VIN+
VIN- GND
OUT
for
+12V
Common-Mode
OUT
for
-12V
Common-Mode
RSHUNT
LOAD
-12V
I2
Figure 24. Monitor Bipolar Output Power-Supply Current
Copyright © 2004–2010, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
13
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
www.ti.com
RSHUNT
LOAD
VSUPPLY
+5V
VIN+
VIN-
+5V
VIN+
V+
VIN-
V+
+5V
INA152
40kW
OUT
INA193-INA198
40kW
OUT
VOUT
INA193-INA198
40kW
40kW
+2.5V
VREF
Figure 25. Bi-Directional Current Monitoring
Up to +80V
RSHUNT
Solenoid
VIN+
+2.7V to +18V
VINV+
OUT
INA193-INA198
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
INA193, INA194
INA195, INA196
INA197, INA198
www.ti.com
SBOS307F – MAY 2004 – REVISED FEBRUARY 2010
VIN+
VIN-
V+
For output
signals > comparator trip-point.
R1
OUT
TLV3012
INA193-INA198
R2
REF
1.25V
Internal
Reference
(a) INA193-INA198 output adjusted by voltage divider.
VIN+
VIN-
V+
OUT
TLV3012
INA193-INA198
R1
(b) Comparator reference voltage adjusted by voltage divider.
R2
REF
1.25V
Internal
Reference
For use with
small output signals.
Figure 27. INA193-INA198 With Comparator
Copyright © 2004–2010, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198
15
INA193, INA194
INA195, INA196
INA197, INA198
SBOS307F – MAY 2004 – REVISED 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
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
(3)
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
Addendum-Page 1
Samples
(Requires Login)
PACKAGE OPTION ADDENDUM
www.ti.com
Orderable Device
20-Aug-2011
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
(3)
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
Samples
(Requires Login)
(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.
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
20-Aug-2011
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 3
PACKAGE MATERIALS INFORMATION
www.ti.com
19-Aug-2011
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
INA193AIDBVR
SOT-23
DBV
5
3000
178.0
9.0
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
3.23
3.17
1.37
4.0
8.0
Q3
INA193AIDBVT
SOT-23
DBV
5
250
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA194AIDBVR
SOT-23
DBV
5
3000
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA194AIDBVT
SOT-23
DBV
5
250
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA195AIDBVR
SOT-23
DBV
5
3000
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA195AIDBVT
SOT-23
DBV
5
250
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA196AIDBVR
SOT-23
DBV
5
3000
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA196AIDBVT
SOT-23
DBV
5
250
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA197AIDBVR
SOT-23
DBV
5
3000
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA197AIDBVT
SOT-23
DBV
5
250
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA198AIDBVR
SOT-23
DBV
5
3000
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
INA198AIDBVT
SOT-23
DBV
5
250
178.0
9.0
3.23
3.17
1.37
4.0
8.0
Q3
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
19-Aug-2011
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
INA193AIDBVR
SOT-23
DBV
5
3000
180.0
180.0
18.0
INA193AIDBVT
SOT-23
DBV
5
250
180.0
180.0
18.0
INA194AIDBVR
SOT-23
DBV
5
3000
180.0
180.0
18.0
INA194AIDBVT
SOT-23
DBV
5
250
180.0
180.0
18.0
INA195AIDBVR
SOT-23
DBV
5
3000
180.0
180.0
18.0
INA195AIDBVT
SOT-23
DBV
5
250
180.0
180.0
18.0
INA196AIDBVR
SOT-23
DBV
5
3000
180.0
180.0
18.0
INA196AIDBVT
SOT-23
DBV
5
250
180.0
180.0
18.0
INA197AIDBVR
SOT-23
DBV
5
3000
180.0
180.0
18.0
INA197AIDBVT
SOT-23
DBV
5
250
180.0
180.0
18.0
INA198AIDBVR
SOT-23
DBV
5
3000
180.0
180.0
18.0
INA198AIDBVT
SOT-23
DBV
5
250
180.0
180.0
18.0
Pack Materials-Page 2
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