INA213-Q1 INA214-Q1 www.ti.com SBOS475B – MARCH 2009 – REVISED JUNE 2010 VOLTAGE OUTPUT, HIGH OR LOW SIDE MEASUREMENT, BIDIRECTIONAL, ZERO-DRIFT CURRENT SHUNT MONITOR Check for Samples: INA213-Q1, INA214-Q1 FEATURES APPLICATIONS • • • • • • • • • 1 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) – 10 ppm/°C Gain Drift (Max) Choice of Gain – INA213: 50 V/V – INA214: 100 V/V Quiescent Current: 100 µA (Max) SC70 Package Notebook Computers Cell Phones Telecom Equipment Power Management Battery Chargers Welding Equipment DCK PACKAGE (TOP VIEW) REF 1 6 OUT GND 2 5 IN- V+ 3 4 IN+ 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. Reference Voltage REF INA21x GND 2.7 V to 26 V CBYPASS 0.01 mF to 0.1 mF RSHUNT Supply Load Output OUT R1 R3 R2 R4 IN- IN+ V+ PRODUCT GAIN R3 and R4 R1 and R2 INA213 INA214 50 100 20 kW 10 kW 1 MW 1 MW 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 © 2009–2010, Texas Instruments Incorporated INA213-Q1 INA214-Q1 SBOS475B – MARCH 2009 – REVISED 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 –40°C to 125°C (1) (2) PACKAGE (2) GAIN ORDERABLE PART NUMBER TOP-SIDE MARKING 50 V/V SC70 – DCK Reel of 3000 INA213AQDCKRQ1 OBX 100 V/V SC70 – DCK Reel of 3000 INA214AQDCKRQ1 OFT 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. 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 VIN+ VIN– Analog inputs voltage VREF REF input voltage VOUT Output voltage (3) 26 V Differential (VIN+)–(VIN–) (2) Common-Mode –26 V to 26 V (3) 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 (3) IIN Input current into any pin qJA Thermal impedance, junction to free air TA Operating temperature –55°C to 150°C Tstg Storage temperature –65°C to 150°C TJ Junction temperature ESD (1) (2) (3) Electrostatic discharge rating 5 mA 250°C/W 150°C Human Body Model (HBM) 3000 V Charged-Device Model (CDM) 1000 V Machine Model (MM) 150 V 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. VIN+ and VIN– are the voltages at the IN+ and IN– pins, respectively. 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 MAX VS Supply voltage 2.7 26 V TJ Junction temperature –40 125 °C 2 Submit Documentation Feedback UNIT Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 INA213-Q1 INA214-Q1 www.ti.com SBOS475B – MARCH 2009 – REVISED JUNE 2010 ELECTRICAL CHARACTERISTICS VSENSE = VIN+ – VIN–, VS = +5 V, VIN+ = 12 V, VREF = VS/2 (unless otherwise noted) PARAMETER TEST CONDITIONS VCM Common-mode input range CMRR Common-mode rejection ratio VIN+ = 0 V to 26 V, VSENSE = 0 mV VOS Offset voltage RTI (2), VSENSE = 0 mV dVOS/dT Offset voltage vs temperature (3) PSR Offset voltage vs power supply IB IOS Full range INA213 INA214 Full range INA213 MIN TYP –0.3 MAX UNIT 26 100 120 100 140 V dB ±100 ±1 ±60 Full range 0.1 0.5 µV/°C VS = 2.7 V to 18 V, VIN+ = 18 V, VSENSE = 0 mV 25°C ±0.1 ±10 µV/V Input bias current VSENSE = 0 mV 25°C 28 35 µA Input offset current VSENSE = 0 mV 25°C Gain error 25°C INA214 15 50 INA214 100 VSENSE = –5 mV to 5 mV µV ±0.02 INA213 Gain error vs temperature (3) µA V/V Full range ±0.02 ±1 % Full range 3 10 ppm/°C Nonlinearity error VSENSE = –5 mV to 5 mV 25°C ±0.01 % Maximum capacitive load No sustained oscillation 25°C 1 nF Output voltage swing to V+ power-supply rail (4) RL = 10 kΩ to GND Output voltage swing to GND BW Bandwidth SR Slew rate Voltage noise density (1) (2) (3) (4) (1) ±5 Gain IQ TA Quiescent current Full range V+ – 0.05 V+ – 0.2 V Full range VGND + 0.005 VGND + 0.05 V CLOAD = 10 pF RTI (2) VSENSE = 0 mV 25°C 14 kHz 25°C 0.4 V/µs 25°C 25 25°C 65 Full range nV/√Hz 100 115 µA Full range TA = –40°C to 125°C RTI = referred to input Not production tested See Typical Characteristic, Output Voltage Swing vs Output Current (Figure 10). Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 Submit Documentation Feedback 3 INA213-Q1 INA214-Q1 SBOS475B – MARCH 2009 – REVISED 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 Population Offset Voltage (mV) 60 40 20 0 -20 -40 -60 30 35 20 25 15 5 10 0 -5 -10 -15 -20 -25 -30 -35 -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 Population CMRR (mV/V) 3 2 1 0 -1 -2 -3 -5.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -4 -5 -50 -25 Figure 3. Submit Documentation Feedback 25 50 75 100 125 150 Temperature (°C) Common-Mode Rejection Ratio (mV/V) 4 0 Figure 4. Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 INA213-Q1 INA214-Q1 www.ti.com SBOS475B – MARCH 2009 – REVISED JUNE 2010 TYPICAL CHARACTERISTICS (continued) TA = 25°C, VS = 5 V, VIN+ = 12 V, and VREF = VS/2 (unless otherwise noted) GAIN ERROR PRODUCTION DISTRIBUTION GAIN ERROR vs TEMPERATURE 1.0 20 Typical Units Shown 0.8 Population Gain Error (%) 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -1.0 -50 0 -25 125 POWER-SUPPLY REJECTION RATIO vs FREQUENCY 60 140 50 120 40 30 20 VCM = 0V VDIF = 15mVPP Sine 1k 80 60 VS = +5V + 250mV Sine Disturbance VCM = 0V VDIF = Shorted VREF = 2.5V 20 0 10k 100k 1M 10M 150 100 40 10 100 100 GAIN vs FREQUENCY 160 10 75 Figure 6. 70 -10 50 Figure 5. |PSRR| (dB) Gain (dB) Gain Error (%) 0 25 Temperature (°C) 1 10 100 1k Frequency (Hz) Frequency (Hz) Figure 7. Figure 8. Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 10k 100k Submit Documentation Feedback 5 INA213-Q1 INA214-Q1 SBOS475B – MARCH 2009 – REVISED 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 Output Voltage Swing (V) 140 |CMRR| (dB) 120 100 80 60 VS = +5V CM V = 1V Sine VDIF = Shorted VREF = 2.5V 40 20 0 1 10 100 1k 10k 100k V+ (V+) - 0.5 (V+) - 1 (V+) - 1.5 (V+) - 2 (V+) - 2.5 (V+) - 3 VS = 5V to 26V VS = 2.7V to 26V VS = 2.7V GND + 3 GND + 2.5 GND + 2 GND + 1.5 GND + 1 GND + 0.5 GND 1M 0 5 10 15 Frequency (Hz) 30 35 40 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 IB+, IB-, VREF = 0V Input Bias Current (mA) Input Bias Current (mA) 25 Figure 10. 30 20 IB+, IB-, VREF = 2.5V 10 0 20 IB+, VREF = 2.5V 15 10 5 IB+, IB-, VREF = 0V and IB-, VREF = 2.5V 0 -10 -5 0 5 10 15 20 25 30 0 10 15 20 25 Common-Mode Voltage (V) Figure 11. Figure 12. INPUT BIAS CURRENT vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE 30 100 90 Quiescent Current (mA) 30 25 20 15 10 5 0 -50 5 Common-Mode Voltage (V) 35 Input Bias Current (mA) 20 Output Current (mA) Figure 9. 40 6 TA = -40C TA = +25C TA = +125C VS = 2.7V to 26V 80 70 60 50 40 30 20 10 -25 0 25 50 75 100 125 150 0 -50 0 -25 25 50 75 Temperature (°C) Temperature (°C) Figure 13. Figure 14. Submit Documentation Feedback 100 125 150 Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 INA213-Q1 INA214-Q1 www.ti.com SBOS475B – MARCH 2009 – REVISED 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) Referred-to-Input Voltage Noise (200nV/div) Input-Reffered Voltage Noise (nV/Öz) 100 10 VS = ±2.5V VREF = 0V VIN-, VIN+ = 0V 1 10 100 1k 10k VS = ±2.5V VCM = 0V VDIF = 0V VREF = 0V Time (1s/div) 100k Figure 16. STEP RESPONSE (10 mVPP Input Step) COMMON-MODE VOLTAGE TRANSIENT RESPONSE Common-Mode Voltage (1V/div) Figure 15. 2VPP Output Signal Input Voltage (5mV/diV) 10mVPP Input Signal Common Voltage Step 0V Output Voltage 0V Time (50ms/div) Time (100ms/div) Figure 17. Figure 18. INVERTING DIFFERENTIAL INPUT OVERLOAD NONINVERTING DIFFERENTIAL INPUT OVERLOAD Inverting Input Overload Noninverting Input Overload 2V/div 2V/div Output Voltage (40mV/div) Output Voltage (0.5V/diV) Frequency (Hz) 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. Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 Submit Documentation Feedback 7 INA213-Q1 INA214-Q1 SBOS475B – MARCH 2009 – REVISED JUNE 2010 www.ti.com 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 1V/div 1V/div Supply Voltage Output Voltage Output Voltage 0V VS = 5V, 1kHz Step with VDIFF = 0V, VREF = 2.5V 8 0V VS = 5V, 1kHz Step with VDIFF = 0V, VREF = 2.5V Time (100ms/div) Time (100ms/div) Figure 21. Figure 22. 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 2009 – REVISED 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. REF GND 2.7 V to 26 V RSHUNT Supply Reference Voltage INA21x OUT R1 R3 R2 R4 Load Output IN- IN+ V+ 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. Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 Submit Documentation Feedback 9 INA213-Q1 INA214-Q1 SBOS475B – MARCH 2009 – REVISED JUNE 2010 www.ti.com 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 Reference Voltage RFILTER < 10 W CFILTER REF INA21x GND R1 OUT R3 Output INf-3dB 2.7 V to 26 V IN+ V+ R2 f-3dB = 1 2p (2 RFILTER) CFILTER 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 GAIN (V/V) R3 AND R4 INA213 50 20 kΩ INA214 100 10 kΩ Using an INA212, for example, the total effect on gain error can be calculated by replacing the R with 1 kΩ – 30%, (or 700 Ω) or 1 kΩ + 30% (or 1.3 kΩ). The tolerance extremes of RFILT can also be inserted into the equation. If a pair of 100-Ω 1% resistors are used on the inputs, the initial gain error is approximately 2%. 10 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 2009 – REVISED 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 Reference Voltage REF INA21x GND 1 MW R3 R2 R4 Shutdown Control Load Output OUT IN- IN+ V+ CBYPASS PRODUCT R3 and R4 INA213 INA213 20 kW 10 kW 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-MΩ impedance (from the combination of 1-MΩ feedback and 5-kΩ input 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-MΩ impedance 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 MΩ to ground, however, assume 1 MΩ to 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-MΩ path. Regarding the 1-MΩ path 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-MΩ resistor. 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-MΩ resistors. 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 Product Folder Link(s): INA213-Q1 INA214-Q1 Submit Documentation Feedback 11 INA213-Q1 INA214-Q1 SBOS475B – MARCH 2009 – REVISED JUNE 2010 www.ti.com RSHUNT Supply Load ADC 2.7 V to 26 V REF INA21x GND R1 R3 R2 R4 Output OUT IN- IN+ V+ 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 Ω. 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-Ω 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 RPROTECT 10 W Load RPROTECT 10 W Reference Voltage REF INA21x GND 1 MW R3 1 MW R4 V+ Shutdown Control Output OUT IN- IN+ 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 2009 – REVISED 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 RPROTECT 10 W Load RPROTECT 10 W Reference Voltage REF INA21x GND 1MW R3 1 MW R4 OUT V+ Shutdown Control Output IN- IN+ CBYPASS Figure 28. Transient Protection Using a Single Transzorb and Input Clamps Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): INA213-Q1 INA214-Q1 Submit Documentation Feedback 13 PACKAGE OPTION ADDENDUM www.ti.com 12-Sep-2011 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) INA213AQDCKRQ1 ACTIVE SC70 DCK 6 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR INA214AQDCKRQ1 ACTIVE SC70 DCK 6 3000 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. 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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 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant INA213AQDCKRQ1 SC70 DCK 6 3000 180.0 8.4 2.25 2.4 1.22 4.0 8.0 Q3 INA214AQDCKRQ1 SC70 DCK 6 3000 180.0 8.4 2.25 2.4 1.22 4.0 8.0 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 SC70 DCK 6 3000 202.0 201.0 28.0 INA214AQDCKRQ1 SC70 DCK 6 3000 202.0 201.0 28.0 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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