1985 Burr-Brown CorporationPDS-617GPrinted in U.S.A. August, 1993
SPECIFICATIONS
ELECTRICAL
At +25°C, VCC = ±15V, unless otherwise noted.
INA105AMPARAMETERGAINInitial(1)Errorvs TemperatureNonlinearity(2)OUTPUTRated VoltageRated CurrentImpedanceCurrent LimitCapacitive LoadINPUTImpedance(3)Voltage Range(4)Common-Mode Rejection(5)OFFSET VOLTAGEInitialvs Temperaturevs Supplyvs TimeOUTPUT NOISE VOLTAGEfB = 0.01Hz to 10HzfO = 10kHzDYNAMIC RESPONSESmall Signal BandwidthFull Power BandwidthSlew RateSettling Time: 0.1%0.01%0.01%POWER SUPPLYRatedVoltage RangeQuiescent CurrentTEMPERATURE RANGESpecificationOperationStorageT Specification same as for INA105AM.
NOTES: (1) Connected as difference amplifier (see Figure 4). (2) Nonlinearity is the maximum peak deviation from the best-fit straight line as a percent of full-scale peak-to-peak output. (3) 25kΩ resistors are ratio matched but have ±20% absolute value. (4) Maximum input voltage without protection is 10V more than either ±15V supply(±25V). Limit IIN to 1mA. (5) With zero source impedance (see “Maintaining CMR” section). (6) Referred to output in unity-gain difference configuration. Note that thiscircuit has a gain of 2 for the operational amplifier’s offset voltage and noise voltage. (7) Includes effects of amplifier’s input bias and offset currents. (8) Includes effectsof amplifier’s input current noise and thermal noise contribution of resistor network.
IO = +20mA, –5mAVO = 10VTo CommonStable OperationDifferentialCommon-ModeDifferentialCommon-ModeTA = TMIN to TMAXRTO(6), (7)5051202.460–3dBVO = 20Vp-pVO = 10V StepVO = 10V StepVCM = 10V Step, VDIFF = 0V1503451.5±15Derated PerformanceVO = 0V±5±1.5–40–55–65±18±2+85+125+150TTTTT2502025T5TTTTTTTTTTTTTTTTTTT–40–40T1015TTTTTTTTTTTTTTTT+85+125500TTµVµV/°CµV/VµV/moµVp-pnV/√HzMHzkHzV/µsµsµsµsVVmA°C°C°C10+20, –5CONDITIONSMINTYPMAXMININA105BMTYPMAXMININA105KP, KUTYPMAXUNITS10.00510.0002120.01+40/–1010005050±10±20800.0150.001TTTTTTTTTTTTTT86TTTTTT0.01TTTTTTTTTT720.025TTV/V%ppm/°C%VmAΩmApFkΩkΩVVdB90100T±VS = 6V to 18VRTO(6), (8)302TTTTThe information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumesno responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to changewithout notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrantany BURR-BROWN product for use in life support devices and/or systems.
®INA105
2
PIN CONFIGURATIONS
Top ViewTO-99TabNo InternalConnection8Ref 17V+–In26Output35+InSense4INA105AMV–INA105BMCase internally connected to V–. Make no connection.ABSOLUTE MAXIMUM RATINGS
Supply................................................................................................±18VInput Voltage Range............................................................................±VSOperating Temperature Range: M..................................–55°C to +125°C
P, U................................–40°C to +85°C
Storage Temperature Range: M.....................................–65°C to +150°C P, U.................................–40°C to +125°CLead Temperature (soldering, 10s) M, P.......................................+300°CWave Soldering (3s, max) U..........................................................+260°COutput Short Circuit to Common..............................................Continuous
PACKAGE/ORDERING INFORMATION
PACKAGEDRAWINGTEMPERATURE
PRODUCTPACKAGENUMBER(1)
RANGEINA105AMTO-99 Metal001–40°C to +85°CINA105BMTO-99 Metal001–40°C to +85°CINA105KP8-Pin Plastic DIP006–40°C to +85°CINA105KU
8-Pin SOIC
182
–40°C to +85°C
NOTE: (1) For detailed drawing and dimension table, please see end of datasheet, or Appendix C of Burr-Brown IC Data Book.
3
Top ViewDIP/SOICRef18No Internal Connection(1)–In27V++In36OutputV–45SenseNOTE: (1) Performance grade identifier box for small outline surface mount.Blank indicates K grade. Part is marked INA105U.ELECTROSTATICDISCHARGE SENSITIVITYThis integrated circuit can be damaged by ESD. Burr-Brownrecommends that all integrated circuits be handled withappropriate precautions. Failure to observe proper handlingand installation procedures can cause damage.
ESD damage can range from subtle performance degradationto complete device failure. Precision integrated circuits maybe more susceptible to damage because very small parametricchanges could cause the device not to meet its publishedspecifications.
®INA105
TYPICAL PERFORMANCE CURVES
At TA = 25°C, VS = ±15V, unless otherwise noted.
STEP RESPONSE)V( eg0a1t+l ooVt t0u1p–tuO0481216Time (µs)SMALL SIGNAL RESPONSE(RLOAD = , C∞ΩLOAD = 1000pF))V+50m( egatlo0V tuptuO–500510Time (µs)MAXIMUM VOUT vs IOUT(Positive Swing)17.5VS = ±18V1512.5VS = ±15V)V(10VS = ±12V TUOV7.55V2.5S = ±5V0061218243036IOUT (mA)®INA105
SMALL SIGNAL RESPONSE(No Load))V+50m( egatlo0V tuptuO–500510Time (µs)MAXIMUM VOUT vs IOUT(Negative Swing)–17.5V–15S = ±18V–12.5VS = ±15V)V(–10 VTS = ±12VUOV–7.5–5–2.5VS = ±5V00–2–4–6–8–10–12–IOUT (mA)CMR vs FREQUENCY110100BM)Bd90AM, KP, U( RMC807060101001k10k100kFrequency (Hz)4
TYPICAL PERFORMANCE CURVES (CONT)
At TA = 25°C, VS = ±15V, unless otherwise noted.
POWER SUPPLY REJECTIONvs FREQUENCY1403630Input Range (V)COMMON-MODE INPUT RANGE vs SUPPLY(Difference Amplifier Connected, VOUT = 0)120PSRR (dB)100V–8024Negative CMV18Positive CMV1260±3±6±9±12±15Supply Voltage (V)±18±2160V+401101001kFrequency (Hz)10k100kAPPLICATION INFORMATION
Figure 1 shows the basic connections required for operationof the INA105. Power supply bypass capacitors should beconnected close to the device pins.
The differential input signal is connected to pins 2 and 3 asshown. The source impedances connected to the inputs mustbe nearly equal to assure good common-mode rejection. A5Ω mismatch in source impedance will degrade the com-mon-mode rejection of a typical device to approximately80dB. If the source has a known mismatch in source imped-ance, an additional resistor in series with one input can beused to preserve good common-mode rejection.
The output is referred to the output reference terminal (pin1) which is normally grounded. A voltage applied to the Refterminal will be summed with the output signal. This can beused to null offset voltage as shown in Figure 2. The sourceimpedance of a signal applied to the Ref terminal should beless than 10Ω to maintain good common-mode rejection.Do not interchange pins 1 and 3 or pins 2 and 5, even thoughnominal resistor values are equal. These resistors are lasertrimmed for precise resistor ratios to achieve accurate gainand highest CMR. Interchanging these pins would not pro-vide specified performance.
5
1µFV–V+1µF4INA1052R125kΩR225kΩ7V25V33R325kΩ6VOUT = V3 – V2R425kΩ1FIGURE 1. Basic Power Supply and Signal Connections.
®INA105
INA1052R1R25V1–InA1R26VOINA10525V2R110ΩV33R36R231V00utputR4+15VVO = V3 – V3Offset AdjustmentRange = ±300µV1499kΩ100kΩ10Ω–15VV1+InA2VO = (1 + 2R2/R1) (V2 –V1) FIGURE 2. Offset Adjustment.
For low source impedance applications, an input stage using OPA27 opamps will give the best low noise, offset, and temperature drift performance.At source impedances above about 10kΩ, the bias current noise of theOPA27 reacting with the input impedance begins to dominate the noiseperformance. For these applications, using the OPA111 or dual OPA2111FET input op amp will provide lower noise performance. For lower cost usethe OPA121 plastic. To construct an electrometer use the OPA128.INA105BM–In2R125kΩR225kΩ65A1, A2OPA27AOPA111BOPA128LMR1(Ω)50.5202202R2(Ω)2.5k10k10kGAINCMRR(V/V)(dB)100100100128110118MAXIB40nA1pA75fANOISE AT 1kHz(nV/√HZ)41038V2V0FIGURE 4. Precision Instrumentation Amplifier.
V3+In3R325kΩR425kΩ1INA10525V0 = V3 – V2Gain Error = 0.005%CMR = 100dBNonlinearity = 0.0002%100Ω1%V–100Ω1%6V00 to 2V31FIGURE 3. Precision Difference Amplifier.
IIN0 to 20mAFIGURE 5. Current Receiver with Compliance to Rails.
®INA105
6
INA10525INA1052V256V01V13V0 = V1Gain Error = 0.001% maximum6V013V0 = – V2Gain Error = 0.01% maximumNonlinearity = 0.001% maximumGain Drift = 2ppm/°CFIGURE 9. Precision Unity-Gain Buffer.V+FIGURE 6. Precision Unity-Gain Inverting Amplifier.
+15V26REF102+10V Out3INA1052V+576(V+)/2INA1055–10V Out461Common14Common3FIGURE 10. Pseudoground Generator.
FIGURE 7. ±10V Precision Voltage Reference.
INA1052V+25REF102INA105456+5V Out6V1V31V03V0 = (V1 + V3)/2, ±0.01% maximum –5V Out6FIGURE 11. Precision Average Value Amplifier.
13FIGURE 8. ±5V Precision Voltage Reference.
®7
INA105
INA105INA10520 to +10V Output±2ppm/°C25561V13V01–10Vto+10VInput6Output(1)3V0 = 2 • V1Gain Error = 0.01% maximumGain Drift = 2ppm/°C26REF1010VFIGURE 12. Precision (G = 2) Amplifier.
DeviceVFC320VFC100DAC80DAC703XTR110Output0-10kHz0-FCLOCK/20-FS (12 bits)0-FS (16 bits)4-20mAINA1054NOTE: (1) Unipolar Input Device.25FIGURE 15. Precision Bipolar Offsetting.
6V1V31V03R12R25INA105V0 = V1 + V3, ±0.01% maximumFIGURE 13. Precision Summing Amplifier.
V1V3261V0INA1053R2V0 = 1 + R1V+V( )( )21 3For G=10,See INA106.5FIGURE 16. Precision Summing Amplifier with Gain.
6V3±20V3V0= 1/2 V31V0 = V3/2, ±0.01%FIGURE 14. Precision Gain = 1/2 Amplifier.
®INA105
8
OffsetAdjustNoise (60Hz hum)34A110kΩ5RG1020kΩ10kΩ678INA101AGTransducer orAnalog Signal20kΩ10kΩA3Output11112A210kΩNoise (60Hz hum)Shield100kΩ2+VCC3INA10513–VCC914 Common2561FIGURE 17. Instrumentation Amplifier Guard Drive Generator.
INA10525INA1056V1V232561V3V0 = V3 + V4 – V1 – V2V43V01FIGURE 18. Precision Summing Instrumentation Amplifier.
®9
INA105
INA105V225R6RV131V1INA105256V01IO = (V1 – V2) (1/25k + 1/R) ≅ For R 200 , Figure 24 willΩprovide superior performance.31LoadIOV2FIGURE 19. Precision Voltage-to-Current Converter withDifferential Inputs.2INA1055INA105V2256V02316RV331V01 – V02 = 2 (V2 – V1)FIGURE 22. Differential Output Difference Amplifier.IO = (V3 – V2)/RIOLoadV22INA1055FIGURE 20. Differential Input Voltage-to-Current Converterfor Low IOUT.36R 200≥ΩRINA105V225V31Gate can be+VCC –5VIO = (V3 – V2)/RR6RV331Gate can be+VS –5VLoadR < 200ΩIOFIGURE 23. Isolating Current Source with Buffering Ampli-fier for Greater Accuracy.IO = (V3 – V2) (1/25k + 1/R)LoadIOFIGURE 21. Isolating Current Source.
®INA105
10
Window Center–Window Span2Window Span0 to +5V6531INA1052Lower LimitVIN5Upper Limit510HIGOLO411539WindowComparator72WindowCenter±10V8631INA105Window Center + Window SpanFIGURE 24. Window Comparator with Window Span and Window Center Inputs.–InV1(1)INA105V+R225R1R2631kΩ1RR+InV2(1)LoadIO = (E2 – E1) (1 +2R2/R1) (1/25k + 1/R)NOTE: (1) See Figure 5 for op amp recommendation.IOFIGURE 25. Precision Voltage-Controlled Current Source with Buffered Differential Inputs and Gain.
INA1052V1DG188356VO1Logic InLogicIn101VO–V1+V1FIGURE 26. Digitally Controlled Gain of ±1 Amplifier.
®11
INA105
INA105V1A1R149.5Ω5R2R226R1A3R149.5Ω3R2A2V2ConventionalInstrumentationAmplifier (e.g., INA101 or INA102)A = 100R21V0 = 200 (V2 – V1)INA105A = 2FIGURE 27. Boosting Instrumentation Amplifier Common-Mode Range From ±5 to ±7.5V with 10V Full-Scale Output.
INA1052D110pFR1R253D2V1InputOPA111R52kΩ1R3R46V0 = |V1|FIGURE 28. Precision Absolute Value Buffer.
0 to 10VIn12.5kΩ1kΩ50kΩINA105+15V250.1Ω6REF10610V344 to 20mAOut1RLOAD50.1ΩOPA2725FIGURE 29. Precision 4-20mA Current Transmitter.
®INA105
12
因篇幅问题不能全部显示，请点此查看更多更全内容