INA212-Q1_15 [TI]

Zero-Drift Series, Current-Shunt Monitors;
INA212-Q1_15
型号: INA212-Q1_15
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

Zero-Drift Series, Current-Shunt Monitors

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INA213-Q1  
INA214-Q1  
www.ti.com  
SBOS475B MARCH 2009REVISED JUNE 2010  
VOLTAGE OUTPUT, HIGH OR LOW SIDE MEASUREMENT, BIDIRECTIONAL, ZERO-DRIFT  
CURRENT SHUNT MONITOR  
Check for Samples: INA213-Q1, INA214-Q1  
1
FEATURES  
APPLICATIONS  
Notebook Computers  
Cell Phones  
Telecom Equipment  
Power Management  
Battery Chargers  
Welding Equipment  
2
Qualified for Automotive Applications  
Wide Common-Mode Range: –0.3 V to 26 V  
Offset Voltage: ±100 µV (Max)  
Enables Shunt Drops of 10 mV Full-Scale  
Accuracy  
±1% Gain Error (Max Over Temperature)  
0.5 µV/°C Offset Drift (Max)  
DCK PACKAGE  
(TOP VIEW)  
10 ppm/°C Gain Drift (Max)  
Choice of Gain  
REF  
GND  
V+  
1
2
3
6
5
4
OUT  
IN-  
INA213: 50 V/V  
INA214: 100 V/V  
IN+  
Quiescent Current: 100 µA (Max)  
SC70 Package  
DESCRIPTION  
The INA213 and INA214 are voltage-output current-shunt monitors that can sense drops across shunts at  
common-mode voltages from –0.3 V to 26 V, independent of the supply voltage. The INA213 offers a fixed gain  
of 50 V/V, and the INA214 offers a fixed gain of 100 V/V. The low offset of the zero-drift architecture enables  
current sensing with maximum drops across the shunt as low as 10-mV full-scale.  
The devices operate from a single 2.7-V to 26-V power supply, drawing a maximum of 100 µA of supply current.  
They are specified over the operating temperature range of –40°C to 125°C and are offered in an SC70 package.  
RSHUNT  
Reference  
Voltage  
Supply  
Load  
Output  
INA21x  
OUT  
REF  
R1  
R3  
IN-  
GND  
2.7 V to 26 V  
IN+  
V+  
R2  
R4  
CBYPASS  
0.01 mF  
to  
PRODUCT  
GAIN  
R3 and R4  
R1 and R2  
INA213  
INA214  
50  
20 kW  
10 kW  
1 MW  
1 MW  
0.1 mF  
100  
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.  
All trademarks are the property of their respective owners.  
2
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 © 2009–2010, Texas Instruments Incorporated  
INA213-Q1  
INA214-Q1  
SBOS475B MARCH 2009REVISED JUNE 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.  
ORDERING INFORMATION(1)  
TJ  
GAIN  
PACKAGE(2)  
ORDERABLE PART NUMBER  
TOP-SIDE MARKING  
OBX  
OFT  
50 V/V  
SC70 – DCK  
Reel of 3000  
Reel of 3000  
INA213AQDCKRQ1  
–40°C to 125°C  
100 V/V SC70 – DCK  
INA214AQDCKRQ1  
(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.  
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.  
ABSOLUTE MAXIMUM RATINGS(1)  
Over operating free-air temperature range, unless otherwise noted.  
VS  
Supply voltage  
26 V  
–26 V to 26 V  
GND – 0.3 V to 26 V  
GND – 0.3 V to V+ + 0.3 V  
GND – 0.3 V to V+ + 0.3 V  
5 mA  
Differential (VIN+)–(VIN–  
)
VIN+  
VIN–  
(2)  
Analog inputs voltage  
(3)  
Common-Mode  
VREF  
VOUT  
IIN  
REF input voltage  
Output voltage(3)  
Input current into any pin(3)  
Thermal impedance, junction to free air  
Operating temperature  
qJA  
TA  
250°C/W  
–55°C to 150°C  
–65°C to 150°C  
150°C  
Tstg  
TJ  
Storage temperature  
Junction temperature  
Human Body Model (HBM)  
Charged-Device Model (CDM)  
Machine Model (MM)  
3000 V  
ESD  
Electrostatic discharge rating  
1000 V  
150 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 implied.  
(2) VIN+ and VIN– are the voltages at the IN+ and IN– pins, respectively.  
(3) Input voltage at any pin may exceed the voltage shown if the current at that pin is limited to 5 mA.  
RECOMMENDED OPERATING CONDITIONS  
over operating free-air temperature range (unless otherwise noted)  
MIN  
2.7  
MAX UNIT  
VS  
TJ  
Supply voltage  
26  
V
Junction temperature  
–40  
125  
°C  
2
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Product Folder Link(s): INA213-Q1 INA214-Q1  
INA213-Q1  
INA214-Q1  
www.ti.com  
SBOS475B MARCH 2009REVISED JUNE 2010  
ELECTRICAL CHARACTERISTICS  
VSENSE = VIN+ – VIN–, VS = +5 V, VIN+ = 12 V, VREF = VS/2 (unless otherwise noted)  
(1)  
PARAMETER  
TEST CONDITIONS  
TA  
MIN  
TYP  
MAX  
UNIT  
Common-mode input  
range  
VCM  
Full range  
Full range  
–0.3  
26  
V
INA213  
INA214  
INA213  
INA214  
100  
100  
120  
140  
±5  
Common-mode  
rejection ratio  
VIN+ = 0 V to 26 V,  
VSENSE = 0 mV  
CMRR  
dB  
µV  
±100  
±60  
VOS  
Offset voltage  
RTI(2), VSENSE = 0 mV  
25°C  
±1  
Offset voltage vs  
temperature(3)  
dVOS/dT  
PSR  
Full range  
25°C  
0.1  
0.5  
µV/°C  
µV/V  
Offset voltage vs  
power supply  
VS = 2.7 V to 18 V,  
VIN+ = 18 V, VSENSE = 0 mV  
±0.1  
±10  
35  
IB  
Input bias current  
Input offset current  
VSENSE = 0 mV  
VSENSE = 0 mV  
INA213  
25°C  
25°C  
15  
28  
±0.02  
50  
µA  
µA  
IOS  
Gain  
V/V  
%
INA214  
100  
Gain error  
VSENSE = –5 mV to 5 mV  
Full range  
Full range  
25°C  
±0.02  
±1  
Gain error vs  
temperature(3)  
3
±0.01  
1
10 ppm/°C  
Nonlinearity error  
VSENSE = –5 mV to 5 mV  
No sustained oscillation  
%
Maximum capacitive  
load  
25°C  
nF  
Output voltage swing  
to V+ power-supply  
rail(4)  
RL = 10 kto GND  
Full range  
Full range  
V+ – 0.05  
V+ – 0.2  
VGND +  
V
V
Output voltage swing  
to GND  
VGND  
+
0.005  
0.05  
BW  
SR  
Bandwidth  
CLOAD = 10 pF  
25°C  
25°C  
14  
kHz  
V/µs  
Slew rate  
0.4  
25  
Voltage noise density  
RTI(2)  
25°C  
nV/Hz  
25°C  
65  
100  
115  
IQ  
Quiescent current  
VSENSE = 0 mV  
µA  
Full range  
(1) Full range TA = –40°C to 125°C  
(2) RTI = referred to input  
(3) Not production tested  
(4) See Typical Characteristic, Output Voltage Swing vs Output Current (Figure 10).  
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INA213-Q1  
INA214-Q1  
SBOS475B MARCH 2009REVISED JUNE 2010  
www.ti.com  
TYPICAL CHARACTERISTICS  
TA = 25°C, VS = 5 V, VIN+ = 12 V, and VREF = VS/2 (unless otherwise noted)  
INPUT OFFSET VOLTAGE  
PRODUCTION DISTRIBUTION  
OFFSET VOLTAGE  
vs TEMPERATURE  
100  
80  
60  
40  
20  
0
-20  
-40  
-60  
-80  
-100  
-50  
-25  
0
25  
50  
75  
100  
125  
150  
Temperature (°C)  
Offset Voltage (mV)  
Figure 1.  
Figure 2.  
COMMON-MODE REJECTION  
PRODUCTION DISTRIBUTION  
COMMON-MODE REJECTION RATIO  
vs TEMPERATURE  
5
4
3
2
1
0
-1  
-2  
-3  
-4  
-5  
-50  
-25  
0
25  
50  
75  
100  
125  
150  
Temperature (°C)  
Common-Mode Rejection Ratio (mV/V)  
Figure 3.  
Figure 4.  
4
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INA213-Q1  
INA214-Q1  
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SBOS475B MARCH 2009REVISED JUNE 2010  
TYPICAL CHARACTERISTICS (continued)  
TA = 25°C, VS = 5 V, VIN+ = 12 V, and VREF = VS/2 (unless otherwise noted)  
GAIN ERROR  
GAIN ERROR  
PRODUCTION DISTRIBUTION  
vs TEMPERATURE  
1.0  
0.8  
20 Typical Units Shown  
0.6  
0.4  
0.2  
0
-0.2  
-0.4  
-0.6  
-0.8  
-1.0  
-50  
-25  
0
25  
50  
75  
100  
125  
150  
Temperature (°C)  
Gain Error (%)  
Figure 5.  
Figure 6.  
GAIN  
vs FREQUENCY  
POWER-SUPPLY REJECTION RATIO  
vs FREQUENCY  
160  
140  
120  
100  
80  
70  
60  
50  
40  
30  
20  
10  
0
60  
VS = +5V + 250mV Sine Disturbance  
VCM = 0V  
40  
VCM = 0V  
20  
VDIF = Shorted  
VDIF = 15mVPP Sine  
VREF = 2.5V  
0
-10  
1
10  
100  
1k  
10k  
100k  
10  
100  
1k  
10k  
100k  
1M  
10M  
Frequency (Hz)  
Frequency (Hz)  
Figure 7.  
Figure 8.  
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INA213-Q1  
INA214-Q1  
SBOS475B MARCH 2009REVISED JUNE 2010  
www.ti.com  
TYPICAL CHARACTERISTICS (continued)  
TA = 25°C, VS = 5 V, VIN+ = 12 V, and VREF = VS/2 (unless otherwise noted)  
COMMON-MODE REJECTION RATIO  
vs FREQUENCY  
OUTPUT VOLTAGE SWING  
vs OUTPUT CURRENT  
160  
140  
120  
100  
80  
V+  
(V+) - 0.5  
(V+) - 1  
VS = 5V to 26V  
(V+) - 1.5  
(V+) - 2  
VS = 2.7V  
to 26V  
(V+) - 2.5  
(V+) - 3  
VS = 2.7V  
GND + 3  
GND + 2.5  
GND + 2  
GND + 1.5  
GND + 1  
GND + 0.5  
GND  
60  
VS = +5V  
40  
VCM = 1V Sine  
VDIF = Shorted  
VREF = 2.5V  
TA = -40C  
TA = +25C  
20  
VS = 2.7V to 26V  
TA = +125C  
0
1
10  
100  
1k  
10k  
100k  
1M  
0
5
10  
15  
20  
25  
30  
35  
40  
Frequency (Hz)  
Output Current (mA)  
Figure 9.  
Figure 10.  
INPUT BIAS CURRENT vs COMMON-MODE VOLTAGE  
with SUPPLY VOLTAGE = +5 V  
INPUT BIAS CURRENT vs COMMON-MODE VOLTAGE  
with SUPPLY VOLTAGE = 0 V (Shutdown)  
50  
30  
25  
40  
IB+, IB-, VREF = 0V  
20  
30  
20  
IB+, VREF = 2.5V  
15  
10  
IB+, IB-, VREF = 2.5V  
10  
5
IB+, IB-, VREF = 0V  
and  
0
0
IB-, VREF = 2.5V  
-10  
-5  
0
5
10  
15  
20  
25  
30  
0
5
10  
15  
20  
25  
30  
Common-Mode Voltage (V)  
Common-Mode Voltage (V)  
Figure 11.  
Figure 12.  
INPUT BIAS CURRENT  
vs TEMPERATURE  
QUIESCENT CURRENT  
vs TEMPERATURE  
35  
30  
25  
20  
15  
10  
5
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
0
-50  
-25  
0
25  
50  
75  
100  
125  
150  
-50  
-25  
0
25  
50  
75  
100  
125  
150  
Temperature (°C)  
Temperature (°C)  
Figure 13.  
Figure 14.  
6
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Product Folder Link(s): INA213-Q1 INA214-Q1  
INA213-Q1  
INA214-Q1  
www.ti.com  
SBOS475B MARCH 2009REVISED JUNE 2010  
TYPICAL CHARACTERISTICS (continued)  
TA = 25°C, VS = 5 V, VIN+ = 12 V, and VREF = VS/2 (unless otherwise noted)  
INPUT-REFERRED VOLTAGE NOISE  
vs FREQUENCY  
0.1 Hz to 10 Hz VOLTAGE NOISE  
(Referred-to-Input)  
100  
10  
VS = ±2.5V  
VCM = 0V  
VDIF = 0V  
VREF = 0V  
VS = ±2.5V  
VREF = 0V  
VIN-, VIN+ = 0V  
1
Time (1s/div)  
10  
100  
1k  
10k  
100k  
Frequency (Hz)  
Figure 15.  
Figure 16.  
STEP RESPONSE  
(10 mVPP Input Step)  
COMMON-MODE VOLTAGE  
TRANSIENT RESPONSE  
Common Voltage Step  
2VPP Output Signal  
0V  
0V  
10mVPP Input Signal  
Output Voltage  
Time (50ms/div)  
Time (100ms/div)  
Figure 17.  
Figure 18.  
INVERTING DIFFERENTIAL INPUT OVERLOAD  
NONINVERTING DIFFERENTIAL INPUT OVERLOAD  
Inverting Input Overload  
Noninverting Input Overload  
Output  
Output  
0V  
0V  
VS = 5V, VCM = 12V, VREF = 2.5V  
VS = 5V, VCM = 12V, VREF = 2.5V  
Time (250ms/div)  
Time (250ms/div)  
Figure 19.  
Figure 20.  
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INA213-Q1  
INA214-Q1  
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TYPICAL CHARACTERISTICS (continued)  
TA = 25°C, VS = 5 V, VIN+ = 12 V, and VREF = VS/2 (unless otherwise noted)  
START-UP RESPONSE  
BROWNOUT RECOVERY  
Supply Voltage  
Supply Voltage  
Output Voltage  
Output Voltage  
0V  
VS = 5V, 1kHz Step with VDIFF = 0V, VREF = 2.5V  
VS = 5V, 1kHz Step with VDIFF = 0V, VREF = 2.5V  
0V  
Time (100ms/div)  
Time (100ms/div)  
Figure 21.  
Figure 22.  
8
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INA213-Q1  
INA214-Q1  
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SBOS475B MARCH 2009REVISED JUNE 2010  
APPLICATION INFORMATION  
BASIC CONNECTIONS  
Figure 23 shows the basic connections of the INA213 or INA214. The input pins, IN+ and IN–, should be  
connected as closely as possible to the shunt resistor to minimize any resistance in series with the shunt  
resistance.  
RSHUNT  
Supply  
Load  
Reference  
Voltage  
INA21x  
Output  
OUT  
REF  
R1  
R3  
IN-  
GND  
2.7 V to 26 V  
IN+  
V+  
R2  
R4  
CBYPASS  
0.01 mF  
to  
0.1 mF  
Figure 23. Typical Application  
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.  
POWER SUPPLY  
The input circuitry of the INA21x can accurately measure beyond its power-supply voltage, V+. For example, the  
V+ power supply can be 5 V, whereas the load power supply voltage can be as high as 26 V. However, the  
output voltage range of the OUT terminal is limited by the voltages on the power-supply pin. Note also that the  
INA21x can withstand the full –0.3 V to 26 V in the input pins, regardless of whether the device has power  
applied or not.  
SELECTING RS  
The zero-drift offset performance of the INA21x offers several benefits. Most often, the primary advantage of the  
low offset characteristic enables lower full-scale drops across the shunt. For example, non-zero-drift current  
shunt monitors typically require a full-scale range of 100 mV.  
The INA21x gives equivalent accuracy at a full-scale range on the order of 10 mV. This accuracy reduces shunt  
dissipation by an order of magnitude with many additional benefits.  
Alternatively, there are applications that must measure current over a wide dynamic range that can take  
advantage of the low offset on the low end of the measurement. Most often, these applications can use the lower  
gain INA213 or INA214 to accommodate larger shunt drops on the upper end of the scale. For instance, an  
INA213 operating on a 3.3-V supply could easily handle a full-scale shunt drop of 60 mV, with only 60 µV of  
offset.  
UNIDIRECTIONAL OPERATION  
Unidirectional operation allows the INA21x to measure currents through a resistive shunt in one direction. The  
most frequent case of unidirectional operation sets the output at ground by connecting the REF pin to ground. In  
unidirectional applications where the highest possible accuracy is desirable at very low inputs, bias the REF pin  
to a convenient value above 50 mV to get the device output swing into the linear range for zero inputs.  
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A less frequent case of unipolar output biasing is to bias the output by connecting the REF pin to the supply; in  
this case, the quiescent output for zero input is at quiescent supply. This configuration would only respond to  
negative currents (inverted voltage polarity at the device input).  
BIDIRECTIONAL OPERATION  
Bidirectional operation allows the INA21x to measure currents through a resistive shunt in two directions. In this  
case, the output can be set anywhere within the limits of what the reference inputs allow (that is, between 0 V  
and V+). Typically, it is set at half-scale for equal range in both directions. In some cases, however, it is set at a  
voltage other than half-scale when the bidirectional current is nonsymmetrical.  
The quiescent output voltage is set by applying voltage to the reference input. Under zero differential input  
conditions the output assumes the same voltage as is applied to the reference input.  
INPUT FILTERING  
An obvious and straightforward location for filtering is at the output of the INA21x; 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 INA21x; this location requires consideration of the ±30% tolerance of the input impedance. Figure 24  
shows a filter placed at the input pins.  
RSHUNT << RFILTER  
LOAD  
VSUPPLY  
RFILTER < 10 W  
RFILTER < 10 W  
Reference  
Voltage  
CFILTER  
Output  
INA21x  
OUT  
REF  
R1  
R3  
IN-  
GND  
f-3dB  
1
=
f-  
3dB  
2.7 V to 26 V  
p
2
(2 RFILTER) CFILTER  
IN+  
V+  
R2  
R4  
CBYPASS  
0.01 mF  
to  
0.1 mF  
Figure 24. Input Filter  
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 1:  
GainError% = 100 - [100 ´ {R/(R + RFILT)}]  
(1)  
Where R is the value for R3 or R4 from Table 1 for the model in question.  
Table 1.  
PRODUCT  
INA213  
GAIN (V/V)  
R3 AND R4  
20 kΩ  
50  
INA214  
100  
10 kΩ  
Using an INA212, for example, the total effect on gain error can be calculated by replacing the R with  
1 k– 30%, (or 700 ) or 1 k+ 30% (or 1.3 k). The tolerance extremes of RFILT can also be inserted into the  
equation. If a pair of 100-1% resistors are used on the inputs, the initial gain error is approximately 2%.  
10  
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INA214-Q1  
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SBOS475B MARCH 2009REVISED JUNE 2010  
SHUTTING DOWN  
While the INA21x does not have a shutdown pin, its low power consumption allows powering from the output of a  
logic gate or transistor switch that can turn on and turn off the INA21x power-supply quiescent current.  
However, in current shunt monitoring applications. there is also a concern for how much current is drained from  
the shunt circuit in shutdown conditions. Evaluating this current drain involves considering the simplified  
schematic of the INA21x in shutdown mode shown in Figure 25.  
RSHUNT  
Supply  
Load  
Reference  
Voltage  
INA21x  
Output  
OUT  
IN-  
REF  
R3  
1 MW  
GND  
Shutdown  
Control  
IN+  
V+  
PRODUCT  
R3 and R4  
R2  
R4  
INA213  
INA213  
20 kW  
10 kW  
CBYPASS  
NOTE: 1-MW paths from shunt inputs to reference and INA21x outputs.  
Figure 25. Basic Circuit for Shutting Down INA21x With Grounded Reference  
Note that there is typically slightly more than 1-Mimpedance (from the combination of 1-Mfeedback and  
5-kinput resistors) from each input of the INA21x to the OUT pin and to the REF pin. The amount of current  
flowing through these pins depends on the respective ultimate connection. For example, if the REF pin is  
grounded, the calculation of the effect of the 1-Mimpedance from the shunt to ground is straightforward.  
However, if the reference or op amp is powered while the INA21x is shut down, the calculation is direct; instead  
of assuming 1 Mto ground, however, assume 1 Mto the reference voltage. If the reference or op amp is also  
shut down, some knowledge of the reference or op amp output impedance under shutdown conditions is  
required. For instance, if the reference source behaves as an open circuit when it is unpowered, little or no  
current flows through the 1-Mpath.  
Regarding the 1-Mpath to the output pin, the output stage of a disabled INA21x does constitute a good path to  
ground; consequently, this current is directly proportional to a shunt common-mode voltage impressed across a  
1-Mresistor.  
As a final note, when the device is powered up, there is an additional, nearly constant, and well-matched 25 µA  
that flows in each of the inputs as long as the shunt common-mode voltage is 3 V or higher. Below 2-V  
common-mode, the only current effects are the result of the 1-Mresistors.  
REF INPUT IMPEDANCE EFFECTS  
As with any difference amplifier, the INA21x common-mode rejection ratio is affected by any impedance present  
at the REF input. This concern is not a problem when the REF pin is connected directly to most references or  
power supplies. When using resistive dividers from the power supply or a reference voltage, the REF pin should  
be buffered by an op amp.  
In systems where the INA21x output can be sensed differentially, such as by a differential input analog-to-digital  
converter (ADC) or by using two separate ADC inputs, the effects of external impedance on the REF input can  
be cancelled. Figure 26 depicts a method of taking the output from the INA21x by using the REF pin as a  
reference.  
Copyright © 2009–2010, Texas Instruments Incorporated  
Submit Documentation Feedback  
11  
Product Folder Link(s): INA213-Q1 INA214-Q1  
 
INA213-Q1  
INA214-Q1  
SBOS475B MARCH 2009REVISED JUNE 2010  
www.ti.com  
RSHUNT  
Load  
Supply  
ADC  
INA21x  
Output  
OUT  
REF  
R1  
R3  
IN-  
GND  
2.7 V to 26 V  
IN+  
V+  
R2  
R4  
CBYPASS  
0.01 mF  
to  
0.1 mF  
Figure 26. Sensing INA21x to Cancel Effects of Impedance on the REF Input  
USING THE INA21x WITH COMMON-MODE TRANSIENTS ABOVE 26 V  
With a small amount of additional circuitry, the INA21x can be used in circuits subject to transients higher than 26  
V, such as automotive applications. Use only zener diode or zener-type transient absorbers (sometimes referred  
to as Transzorbs) — any other type of transient absorber has an unacceptable time delay. Start by adding a pair  
of resistors as shown in Figure 27 as a working impedance for the zener. It is desirable to keep these resistors  
as small as possible, most often around 10 . Larger values can be used with an effect on gain that is discussed  
in the section on input filtering. Because this circuit is limiting only short-term transients, many applications are  
satisfied with a 10-resistor along with conventional zener diodes of the lowest power rating that can be found.  
This combination uses the least amount of board space. These diodes can be found in packages as small as  
SOT-523 or SOD-523.  
RSHUNT  
Supply  
Load  
RPROTECT  
10 W  
RPROTECT  
10 W  
Reference  
Voltage  
Output  
INA21x  
OUT  
REF  
R3  
1 MW  
IN-  
GND  
V+  
IN+  
Shutdown  
Control  
1 MW  
R4  
CBYPASS  
Figure 27. INA21x Transient Protection Using Dual Zener Diodes  
12  
Submit Documentation Feedback  
Copyright © 2009–2010, Texas Instruments Incorporated  
Product Folder Link(s): INA213-Q1 INA214-Q1  
 
INA213-Q1  
INA214-Q1  
www.ti.com  
SBOS475B MARCH 2009REVISED JUNE 2010  
If low-power zener diodes do not have sufficient transient absorption capability and a higher power transzorb  
must be used, the most package-efficient solution then involves using a single transzorb and back-to-back  
diodes between the device inputs. The most space-efficient solutions are dual series-connected diodes in a  
single SOT-523 or SOD-523 package. This method is shown in Figure 28. In either of these examples, the total  
board area required by the INA21x with all protective components is less than that of an SO-8 package, and only  
slightly greater than that of an MSOP-8 package.  
RSHUNT  
Supply  
Load  
RPROTECT  
10 W  
RPROTECT  
10 W  
Reference  
Voltage  
Output  
INA21x  
OUT  
REF  
R3  
1MW  
IN-  
GND  
V+  
IN+  
Shutdown  
Control  
1 MW  
R4  
CBYPASS  
Figure 28. Transient Protection Using a Single Transzorb and Input Clamps  
Copyright © 2009–2010, Texas Instruments Incorporated  
Submit Documentation Feedback  
13  
Product Folder Link(s): INA213-Q1 INA214-Q1  
 
PACKAGE OPTION ADDENDUM  
www.ti.com  
12-Sep-2011  
PACKAGING INFORMATION  
Status (1)  
Eco Plan (2)  
MSL Peak Temp (3)  
Samples  
Orderable Device  
Package Type Package  
Drawing  
Pins  
Package Qty  
Lead/  
Ball Finish  
(Requires Login)  
INA213AQDCKRQ1  
INA214AQDCKRQ1  
ACTIVE  
ACTIVE  
SC70  
SC70  
DCK  
DCK  
6
6
3000  
3000  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU Level-2-260C-1 YEAR  
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.  
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.  
OTHER QUALIFIED VERSIONS OF INA214-Q1 :  
Catalog: INA214  
NOTE: Qualified Version Definitions:  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
12-Sep-2011  
Catalog - TI's standard catalog product  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
14-Sep-2011  
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)  
INA213AQDCKRQ1  
INA214AQDCKRQ1  
SC70  
SC70  
DCK  
DCK  
6
6
3000  
3000  
180.0  
180.0  
8.4  
8.4  
2.25  
2.25  
2.4  
2.4  
1.22  
1.22  
4.0  
4.0  
8.0  
8.0  
Q3  
Q3  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
14-Sep-2011  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
INA213AQDCKRQ1  
INA214AQDCKRQ1  
SC70  
SC70  
DCK  
DCK  
6
6
3000  
3000  
202.0  
202.0  
201.0  
201.0  
28.0  
28.0  
Pack Materials-Page 2  
IMPORTANT NOTICE  
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