INA217 INA 217 INA 217 SBOS247B – JUNE 2002 – REVISED FEBRUARY 2005 Low-Noise, Low-Distortion INSTRUMENTATION AMPLIFIER Replacement for SSM2017 FEATURES DESCRIPTION ● ● ● ● ● ● ● The INA217 is a low-noise, low-distortion, monolithic instrumentation amplifier. Current-feedback circuitry allows the INA217 to achieve wide bandwidth and excellent dynamic response over a wide range of gain. The INA217 is ideal for low-level audio signals such as balanced low-impedance microphones. Many industrial, instrumentation, and medical applications also benefit from its low noise and wide bandwidth. LOW NOISE: 1.3nV/√Hz at 1kHz LOW THD+N: 0.004% at 1kHz, G = 100 WIDE BANDWIDTH: 800kHz at G = 100 WIDE SUPPLY RANGE: ±4.5V to ±18V HIGH CMR: > 100dB GAIN SET WITH EXTERNAL RESISTOR DIP-8 AND SOL-16 WIDEBODY PACKAGES Unique distortion cancellation circuitry reduces distortion to extremely low levels, even in high gain. The INA217 provides near-theoretical noise performance for 200Ω source impedance. The INA217 features differential input, low noise, and low distortion that provides superior performance in professional microphone amplifier applications. APPLICATIONS ● PROFESSIONAL MICROPHONE PREAMPS ● MOVING-COIL TRANSDUCER AMPLIFIERS ● DIFFERENTIAL RECEIVERS ● BRIDGE TRANSDUCER AMPLIFIERS The INA217 features wide supply voltage, excellent output voltage swing, and high output current drive, making it an optimal candidate for use in high-level audio stages. V+ The INA217 is available in the same DIP-8 and SOL-16 wide body packages and pinouts as the SSM2017. For a smaller package, see the INA163 in SO-14 narrow. The INA217 is specified over the temperature range of –40°C to +85°C. 7 INA217 VIN– RG1 2 1 6kΩ 6kΩ A1 5kΩ 6 A3 5kΩ VOUT G=1+ RG2 8 6kΩ 6kΩ 10kΩ RG A2 VIN+ 3 4 V– 5 REF 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. Copyright © 2002-2005, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. www.ti.com ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage, V+ to V– .................................................................. ±18V Signal Input Terminals, Voltage(2) .................. (V–) – 0.5V to (V+) + 0.5V Current(2) .................................................... 10mA Output Short-Circuit(3) .............................................................. Continuous Operating Temperature .................................................. –55°C to +125°C Storage Temperature ..................................................... –55°C to +150°C Junction Temperature .................................................................... +150°C Lead Temperature (soldering, 10s) ............................................... +300°C NOTES: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. (2) Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails should be current limited to 10mA or less. (3) Short-circuit to ground, one amplifier per package. ELECTROSTATIC DISCHARGE SENSITIVITY 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/ORDERING INFORMATION(1) PACKAGE-LEAD PACKAGE DESIGNATOR INA217 SOL-16 DW INA217 INA217 DIP-8 P INA217 PRODUCT PACKAGE MARKING NOTES: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. PIN CONFIGURATIONS Top View NC 1 16 NC RG1 2 15 RG2 NC 3 14 NC RG1 1 8 RG2 VIN– 4 13 V+ VIN– 2 7 V+ VIN+ 5 12 NC VIN+ 3 6 VOUT NC 6 11 VOUT V– 4 5 REF V– 7 10 REF NC 8 9 DIP-8 NC SOL-16 NC = No Internal Connection 2 INA217 www.ti.com SBOS247B ELECTRICAL CHARACTERISTICS: VS = ±15V Boldface limits apply over the specified temperature range, TA = –40°C to +85°C. TA = +25°C, RL = 2kΩ, VS = ±15V, unless otherwise noted. INA217 PARAMETER CONDITIONS MIN GAIN EQUATION Range Gain Error, G = 1 G = 10 G = 100 G = 1000 Gain Temp Drift Coefficient, G = 1 G > 10 Nonlinearity, G = 1 G = 100 TYP G = 1 + 10k/RG 1 to 10000 ±0.1 ±0.2 ±0.2 ±0.5 ±3 ±40 ±0.0003 ±0.0006 INPUT STAGE NOISE Voltage Noise fO = 1kHz fO = 100Hz fO = 10Hz Current Noise fO = 1kHz MAX ±0.25 ±0.7 ±10 ±100 RSOURCE = 0Ω OUTPUT STAGE NOISE Voltage Noise, fO = 1kHz INPUT OFFSET VOLTAGE Input Offset Voltage vs Temperature vs Power Supply VCM = VOUT = 0V TA = TMIN to TMAX VS = ±4.5V to ±18V INPUT VOLTAGE RANGE Common-Mode Voltage Range VIN+ – VIN– = 0V VIN+ – VIN– = 0V VCM = ±11V, RSRC = 0Ω Common-Mode Rejection, G = 1 G = 100 INPUT BIAS CURRENT Initial Bias Current vs Temperature Initial Offset Current vs Temperature V/V % % % % ppm/°C ppm/°C % of FS % of FS 1.3 1.5 3.5 nV/ √Hz nV/ √Hz nV/ √Hz 0.8 pA/ √Hz 90 nV/ √Hz 50 + 2000/G 1 + 20/G 1 + 50/G (V+) – 4 (V–) + 4 70 100 UNITS 250 + 5000/G 3 + 200/G (V+) – 3 (V–) + 3 80 116 2 10 0.1 0.5 µV µV/°C µV/V V V dB dB 12 1 µA nA/°C µA nA/°C INPUT IMPEDANCE DYNAMIC RESPONSE Bandwidth, Small Signal, –3dB, G = 1 G = 100 Slew Rate THD+Noise, f = 1kHz Settling Time, 0.1% 0.01% Overload Recovery OUTPUT Voltage 60 2 60 2 MΩ pF MΩ pF G = 100 G = 100, 10V Step G = 100, 10V Step 50% Overdrive 3.4 800 15 0.004 2 3.5 1 MHz kHz V/µs % µs µs µs (V+) – 1.8 (V–) + 1.8 1000 ±60 V V pF mA RL to GND Load Capacitance Stability Short-Circuit Current (V+) – 2 (V–) + 2 Continuous-to-Common POWER SUPPLY Rated Voltage Voltage Range Current, Quiescent TEMPERATURE RANGE Specification Operating Thermal Resistance DIP-8 SOL-16 Differential Common-Mode ±4.5 IO = 0mA ±15 ±10 –40 –40 θJA +85 +90 ±18 ±12 V V mA +85 +125 °C °C °C/W °C/W NOTE: (1) Gain accuracy is a function of external RG. INA217 SBOS247B www.ti.com 3 TYPICAL CHARACTERISTICS At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted. THD+N vs FREQUENCY GAIN vs FREQUENCY 0.1 70 G = 1000 60 G = 1000 50 G = 100 30 20 0.01 THD+N (%) Gain (dB) 40 G = 10 G = 100 0.001 10 0 G = 10 G=1 0.0001 –20 10k 100k 1M 20 10M 100 NOISE VOLTAGE (RTI) vs FREQUENCY CURRENT NOISE SPECTRAL DENSITY Current Noise Density (pA/ Hz) G=1 100 G = 10 10 G = 1000 G = 500 G = 100 1 0.1 1 10 100 1k 10k 1 10 100 1k 10k Frequency (Hz) Frequency (Hz) POWER-SUPPLY REJECTION vs FREQUENCY CMR vs FREQUENCY 140 140 G = 1000 100 G = 100 80 G = 10 60 G=1 Power-Supply Rejection (dB) 120 Input Referred CMR (dB) 10k 20k 10.0 1k Noise (RTI) (nV/√Hz) 1k Frequency (Hz) Frequency (Hz) 40 20 0 120 G = 100, 1000 G = 10 100 G=1 80 60 40 20 0 10 100 1k 10k 100k 1M 1 Frequency (Hz) 4 VO = 7Vrms RL = 10kΩ G=1 –10 10 100 1k 10k 100k 1M Frequency (Hz) INA217 www.ti.com SBOS247B TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted. OUTPUT VOLTAGE SWING vs OUTPUT CURRENT SETTLING TIME vs GAIN V+ 10 20V Step 8 (V+) – 4 Settling Time (µs) Output Voltage to Rail (V) (V+) – 2 (V+) – 6 (V–) + 6 (V–) + 4 0.01% 6 4 2 (V–) + 2 0.1% V– 0 10 20 30 40 50 60 1 100 SMALL-SIGNAL TRANSIENT RESPONSE (G = 1) SMALL-SIGNAL TRANSIENT RESPONSE (G = 100) 1000 20mV/div Gain LARGE-SIGNAL TRANSIENT RESPONSE (G = 1) LARGE-SIGNAL TRANSIENT RESPONSE (G = 100) 5V/div 10µs/div 5V/div 2.5µs/div 2.5µs/div 2.5µs/div INA217 SBOS247B 10 Output Current (mA) 20mV/div 0 www.ti.com 5 APPLICATIONS INFORMATION relatively high input bias current and input bias current noise. As a result, the INA217 may not provide the best noise performance with a source impedance greater than 10kΩ. For source impedance greater than 10kΩ, other instrumentation amplifiers may provide improved noise performance. Figure 1 shows the basic connections required for operation. Power supplies should be bypassed with 0.1µF tantalum capacitors near the device pins. The output Reference (pin 5) should be a low-impedance connection. Resistance of a few ohms in series with this connection will degrade the common-mode rejection of the INA217. INPUT CONSIDERATIONS Very low source impedance (less than 10Ω) can cause the INA217 to oscillate. This depends on circuit layout, signal source, and input cable characteristics. An input network consisting of a small inductor and resistor, as shown in Figure 2, can greatly reduce any tendency to oscillate. This is especially useful if a variety of input sources are to be connected to the INA217. Although not shown in other figures, this network can be used as needed with all applications shown. GAIN-SET RESISTOR Gain is set with an external resistor, RG, as shown in Figure 1. The two internal 5kΩ feedback resistors are laser-trimmed to 5kΩ within approximately ±0.2%. The gain equation for the INA217 is: G = 1+ 10, 000 RG The temperature coefficient of the internal 5kΩ resistors is approximately ±25ppm/°C. Accuracy and TCR of the external RG will also contribute to gain error and temperature drift. These effects can be inferred from the gain equation. Make a short, direct connection to the gain set resistor, RG. Avoid running output signals near these sensitive input nodes. V+ 47Ω 2 VIN– 1.2µH 1 1.2µH 8 7 6 INA217 VIN+ NOISE PERFORMANCE 3 VO 5 4 47Ω The INA217 provides very low noise with low-source impedance. Its 1.3nV/√Hz voltage noise delivers near-theoretical noise performance with a source impedance of 200Ω. The input stage design used to achieve this low noise results in V– FIGURE 2. Input Stabilization Network. V+ 0.1µF 7 INA217 VIN– 2 1 6kΩ 6kΩ A1 5kΩ RG A3 5kΩ VOUT 6 G=1+ 8 VIN+ 6kΩ 6kΩ A2 5 3 4 0.1µF V+ Sometimes Shown in Simplified Form: VIN– RG INA217 REF V– 10000 RG GAIN (V/V) (dB) 1 0 2 6 5 14 10 20 20 26 50 34 100 40 200 46 500 54 1000 60 2000 66 RG (Ω) NC(1) 10000 2500 1111 526 204 101 50 20 10 5 NOTE: (1) NC = No Connection. VO VIN+ V– FIGURE 1. Basic Circuit Connections. 6 INA217 www.ti.com SBOS247B OFFSET VOLTAGE TRIM MICROPHONE AMPLIFIER A variable voltage applied to pin 5, as shown in Figure 3, can be used to adjust the output offset voltage. A voltage applied to pin 5 is summed with the output signal. An op amp connected as a buffer is used to provide a low impedance at pin 5 to assure good common-mode rejection. Figure 4 shows a typical circuit for a professional microphone input amplifier. R1 and R2 provide a current path for conventional 48V phantom power source for a remotely located microphone. An optional switch allows phantom power to be disabled. C1 and C2 block the phantom power voltage from the INA217 input circuitry. Non-polarized capacitors should be used for C1 and C2 if phantom power is to be disabled. For additional input protection against ESD and hot-plugging, four IN4148 diodes may be connected from the input to supply lines. V+ 2 7 1 6 INA217 RG 8 3 VO R4 and R5 provide a path for input bias current of the INA217. Input offset current (typically 100nA) creates a DC differential input voltage that will produce an output offset voltage. This is generally the dominant source of output offset voltage in this application. With a maximum gain of 1000 (60dB), the output offset voltage can be several volts. This may be entirely acceptable if the output is AC-coupled into the subsequent stage. An alternate technique is shown in Figure 4. An inexpensive FET-input op amp in a feedback loop drives the DC output voltage to 0V. A2 is not in the audio signal path and does not affect signal quality. V+ 5 4 100µA V– 150Ω OPA237 10kΩ 150Ω 100µA Gain is set with a variable resistor, R7, in series with R6. R6 determines the maximum gain. The total resistance, R6 + R7, determines the lowest gain. A special reverse-log taper potentiometer for R7 can be used to create a linear change (in dB) with rotation. V– FIGURE 3. Offset Voltage Adjustment Circuit. Phantom Power +48V R3 47kΩ R1 6.8kΩ 3 2 47µF R2 6.8kΩ +15V +15V C1(1) 47µF + 1 Female XLR Connector + 60V C2(1) 47µF + 0.1µF IN4148(4) R6(2) 8Ω 7 +15V A1 INA217 IN4148(4) 4 R7(3) 1.6kΩ 60V –15V VO 5 –15V R4 2.2kΩ 6 R5 2.2kΩ 1MΩ 0.1µF 0.1µF Optional DC output control loop. A2 OPA137 –15V NOTES: (1) Use non-polar capacitors if phantom power is to be turned off. (2) R6 sets maximum gain. (3) R7 sets minimum gain. (4) Optional IN4148 prevents damage due to ESD and hot-plugging. FIGURE 4. Phantom-Powered Microphone Preamplifier. INA217 SBOS247B www.ti.com 7 PACKAGE OPTION ADDENDUM www.ti.com 12-Jan-2007 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty INA217AIDWR ACTIVE SOIC DW 16 1000 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR INA217AIDWRE4 ACTIVE SOIC DW 16 1000 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR INA217AIDWT ACTIVE SOIC DW 16 250 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR INA217AIDWTE4 ACTIVE SOIC DW 16 250 Pb-Free (RoHS) CU NIPDAU Level-3-260C-168 HR INA217AIP ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type INA217AIPG4 ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type Lead/Ball Finish MSL Peak Temp (3) (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. Addendum-Page 1 MECHANICAL DATA MPDI001A – JANUARY 1995 – REVISED JUNE 1999 P (R-PDIP-T8) PLASTIC DUAL-IN-LINE 0.400 (10,60) 0.355 (9,02) 8 5 0.260 (6,60) 0.240 (6,10) 1 4 0.070 (1,78) MAX 0.325 (8,26) 0.300 (7,62) 0.020 (0,51) MIN 0.015 (0,38) Gage Plane 0.200 (5,08) MAX Seating Plane 0.010 (0,25) NOM 0.125 (3,18) MIN 0.100 (2,54) 0.021 (0,53) 0.015 (0,38) 0.430 (10,92) MAX 0.010 (0,25) M 4040082/D 05/98 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS-001 For the latest package information, go to http://www.ti.com/sc/docs/package/pkg_info.htm POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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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