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 Submit Documentation Feedback 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 www.ti.com 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 Submit Documentation Feedback Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198 3 INA193, INA194 INA195, INA196 INA197, INA198 SBOS307F – MAY 2004 – REVISED 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 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 Submit Documentation Feedback 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. Submit Documentation Feedback Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198 5 INA193, INA194 INA195, INA196 INA197, INA198 SBOS307F – MAY 2004 – REVISED 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 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 Submit Documentation Feedback 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. Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198 7 INA193, INA194 INA195, INA196 INA197, INA198 SBOS307F – MAY 2004 – REVISED FEBRUARY 2010 www.ti.com 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 Submit Documentation Feedback 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 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 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) Copyright © 2004–2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): INA193 INA194 INA195 INA196 INA197 INA198 9 INA193, INA194 INA195, INA196 INA197, INA198 SBOS307F – MAY 2004 – REVISED FEBRUARY 2010 www.ti.com 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 Submit Documentation Feedback 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 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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