a Precision, Unity-Gain Differential Amplifier AMP03

1 REV. FInformation furnished by analog devices is believed to be accurate andreliable. However, no responsibility is assumed by analog devices for itsuse, nor for any infringements of patents or other rights of third parties thatmay result from its use. No license is granted by implication or otherwiseunder any patent or patent rights of analog devices . Trademarks andregistered trademarks are the property of their respective Technology Way, Box 9106, Norwood, MA 02062-9106, : 781/329-4700 : 781/326-8703 2003 analog devices , Inc. All rights , unity -GainDifferential AmplifierFEATURESHigh CMRR: 100 dB TypLow Nonlinearity: MaxLow Distortion: TypWide Bandwidth: 3 MHz TypFast Slew Rate: V/ s TypFast Settling ( ): 1 s TypLow CostAPPLICATIONSS umming AmplifiersInstrumentation AmplifiersBalanced Line ReceiversCurrent-Voltage ConversionAbsolute Value Amplifier4to 20 mA Current TransmitterPrecision Voltage Reference ApplicationsLower Cost and Higher Speed Version of INA105 GENERAL DESCRIPTIONThe AMP03 is a monolithic Unity-Gain , high speed differentialamplifier.

2 Incorporating a matched thin film resistor network,the AMP03 features stable operation over temperature withoutrequiring expensive external matched components. The AMP03is a basic analog building block for Differential Amplifier andinstrumentation Differential Amplifier topology of the AMP03 both amplifiesthe difference between two signals and provides extremely highrejection of the common-mode input voltage. By providingcommon-mode rejection (CMR) of 100 dB typical, the AMP03solves common problems encountered in instrumentation an example, the AMP03 is ideal for performing either addi-tion or subtraction of two signals without using expensiveexternally matched precision resistors. The large common-moderejection is made possible by matching the internal resistors tobetter than and maintaining a thermally symmetriclayout. Additionally, due to high CMR over frequency, theAMP03 is an ideal general Amplifier for buffering signals in anoisy environment into data acquisition AMP03 is a higher speed alternative to the slew rates of V/ s and a bandwidth of 3 MHz, theAMP03 offers superior performance to the INA105 for highspeed current sources, absolute value amplifiers, and BLOCK DIAGRAM IN+INSENSE+VCCOUTPUT VEEREFERENCE25k 25k 25k 25k 6712345 AMP03 PIN CONNECTIONS8-Lead PDIP(P Suffix)12348765 TOP VIEW(Not to Scale)NC = NO CONNECTAMP03 REFERENCESENSEOUTPUTV+NC IN+INV 8-Lead SOIC(S Suffix)12348765 TOP VIEW(Not to Scale)NC = NO CONNECTAMP03 REFERENCESENSEOUTPUTV+NC IN+INV Header(J Suffix)8 REFERENCE 1 IN 2+IN 37 V+6 OUTPUT5 SENSE4V NCNC = NO CONNECT 2 REV.

3 FAMP03 SPECIFICATIONSELECTRICAL CHARACTERISTICSAMP03 FAMP03 BAMP03 GParameterSymbol ConditionsMinTypMaxMinTypMax MinTypMaxUnitOffset VoltageVOSVCM = 0 V 400+10+400 700+20+700 750+25+750 VGain ErrorNo Load, VIN = 10 V,RS = 0 %Input Voltage RangeIVR(Note 1) 20 20 20 VCommon-Mode RejectionCMRVCM = 10 V8510080958095dBPower Supply Rejection Ratio PSRRVS = 6 V to 18 V/VOutput SwingVORL = 2 k 12 12 12 Current LimitISCO utput Shortedto Ground+45/ 15+45/ 15+45/ 15mASmall-Signal Bandwidth ( 3 dB) BWRL = 2 k 333 MHzSlew RateSRRL = 2 k sCapacitive Load DriveCapabilityCLNo Oscillation300300300pFSupply CurrentISYNo voltage range guaranteed by CMR subject to change without CHARACTERISTICSAMP03 BParameterSymbolConditionsMinTypMaxUnitO ffset VoltageVOSVCM = 0 V 1500+150+1500 VGain ErrorNo Load, VIN = 10 V, RS = 0 Voltage RangeIVR 20 VCommon-Mode RejectionCMRVCM = 10 V7595dBPower Supply RejectionRatioPSRRVS = 6 V to 18 V/VOutput SwingVORL = 2 k 12 RateSRRL = 2 k sSupply CurrentISYNo subject to change without CHARACTERISTICSAMP03 FAMP03 GParameterSymbolConditions MinTypMaxMinTypMaxUnitOffset VoltageVOSVCM = 0 V 1000 +100+1000 2000 +200+2000 VGain ErrorNo Load, VIN = 10 V.

4 RS = 0 Voltage RangeIVR 20 20 VCommon-Mode RejectionCMRVCM = 10 V80957590dBPower Supply RejectionRatioPSRRVS = 6 V to 18 V/VOutput SwingVORL = 2 k 12 12 RateSRRL = 2 k sSupply CurrentISYNo subject to change without notice.(@ VS = 15 V, TA = +25 C, unless otherwise noted.)(@ VS = 15 V, 55 C TA +125 C for B Grade)(@ VS = 15 V, 40 C TA +85 C for F and G Grades) 3 REV. FAMP03 WAFER TEST LIMITS(@ VS = 15 V, TA = 25 C, unless otherwise noted.)* AMP03 GBCP arameterSymbolConditionsLimitUnitOffset VoltageVOSVS = 18 maxGain ErrorNo Load, VIN = 10 V, RS = 0 maxInput Voltage RangeIVR 10V minCommon-Mode RejectionCMRVCM = 10 V80dB minPower Supply Rejection RatioPSRRVS = 6 V to 18 V8 V/V maxOutput SwingVORL = 2 k 12V maxShort-Circuit Current LimitISCO utput Shorted to Ground+45/ 15mA minSupply CurrentISYNo max*Electrical tests are performed at wafer probe to the limits shown.

5 Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteedfor standard product dice. Consult factory to negotiate specifications based on dice lot qualifications through sample lot assembly and MAXIMUM RATINGS1 Supply Voltage .. 18 VInput Voltage2 ..Supply VoltageOutput Short-Circuit Duration .. ContinuousStorage Temperature RangeP, J Package .. 65 C to +150 CLead Temperature (Soldering, 60 sec) .. 300 CJunction Temperature .. 150 COperating Temperature RangeAMP03B .. 55 C to +125 CAMP03F, AMP03G .. 40 C to +85 CPackage Type JA3 JCUnitHeader (J)15018 C/W8-Lead PDIP (P)10343 C/W8-Lead SOIC (S)15540 C/WNOTES1 Absolute maximum ratings apply to both DICE and packaged parts, unlessotherwise supply voltages less than 18 V, the absolute maximum input voltage is equalto the supply JA is specified for worst-case mounting conditions, , JA is specified for devicein socket for header and PDIP packages and for device soldered to printed circuitboard for SOIC GUIDET emperaturePackagePackageModel1 RangeDescriptionOption2 AMP03GP 40 C to +85 C8-Lead PDIPP-8 AMP03BJ 40 C to +85 CHeaderH-08 BAMP03FJ 40 C to +85 CHeaderH-08 BAMP03BJ/883C 55 C to +125 CHeaderH-08 BAMP03GS 40 C to +85 C8-Lead SOICS-8 AMP03GS-REEL 40 C to +85 C8-Lead SOICS-85962-9563901 MGA 55 C to +125 CHeaderH-08 BAMP03 GBCDieNOTES1 Burn-in is available on commercial and industrial temperature range parts inPDIP and header factory for /883 data (electrostatic discharge) sensitive device.

6 Electrostatic charges as high as 4000 V readilyaccumulate on the human body and test equipment and can discharge without the AMP03 features proprietary ESD protection circuitry, permanent damage mayoccur on devices subjected to high energy electrostatic discharges. Therefore, proper ESDprecautions are recommended to avoid performance degradation or loss of CHARACTERISTICS1. REFERENCE2. IN3. +IN4. VEE5. SENSE6. OUTPUT7. +VCC8. NCDIE SIZE inch inch, 5,776 sq. mm( mm mm, sq. mm)BURN-IN CIRCUITAMP03+18V 18V25k 25k 25k SLEW RATE TEST CIRCUITAMP03+15V FVIN = 10 VVOUT = 10 VWARNING!ESD SENSITIVE DEVICEAMP03 Typical Performance Characteristics 4 REV. F TPC 1. Small Signal Transient Response TPC 4. Large Signal Transient ResponseINPUT OFFSET VOLTAGE ( V)1000800 8000 200 400 600600200400 TEMPERATURE ( C) 75 50150 2502575 100 12550VS = 15V TPC 7.

7 Input Offset Voltage vs. TemperatureFREQUENCY (Hz)COMMON-MODE REJECTION (dB)12001101M1001k10k100k904030201080705 060110100 TA = +25 C VS = 15V TPC 2. Common-Mode Rejection vs. FrequencyFREQUENCY (Hz)POWER SUPPLY REJECTION (dB)12001101M1001k10k100k904030201080705 060110100 TA = +25 C VS = 15V PSRR +PSRRTPC 5. Power Supply Rejection (Hz)CLOSED-LOOP gain (dB)5040 301001k10M10k100k1M100 10 203020 TA = +25 C VS = 15V TPC 8. Closed-Loop gain vs. FrequencyFREQUENCY (Hz)THD+N (%) TA = +25 C VS = 15V AV = 1RL = 600 RL = 100k TPC 3. Total Harmonic Distortion vs. FrequencyFREQUENCY (Hz) (%) TA = +25 C VS = 15V AV = 1 RL = 600 , 100k TPC 6. Dynamic Intermodulation Distortion vs. FrequencyFREQUENCY (Hz)OUTPUT IMPEDANCE ( )10801001k1M10k100k642 TA = +25 C VS = 15V TPC 9. Closed-Loop Output Impedance vs. FrequencyAMP03 5 REV. FTEMPERATURE ( C) gain ERROR (%) 75 50100 150VS = 15 VRS = 0 TPC 10.

8 gain Error vs. TemperatureSUPPLY VOLTAGE (V)SUPPLY CURRENT (mA)400 5 20 10 15213TA = +25 C TPC 13. Supply Current vs. Supply VoltageFREQUENCY (Hz)120100011010k1001k80604020 TA = +25 C VS = 15 VHz)VOLTAGE NOISE DENSITY (nV/ TPC 16. Voltage Noise Density vs. Frequency+10 V0V 10 VNOTE: EXTERNAL Amplifier gain = 1000;THEREFORE, VERTICAL SCALE = 10 19. Voltage Noise from 0 kHz to 10 kHzTEMPERATURE ( C)SLEW RATE (V/ s)136 75 50125 250255075100121098711 VS = 15V RL = 2k TPC 11. Slew Rate vs. TemperatureOUTPUT SOURCE CURRENT (mA) OUTPUT VOLTAGE (V)TA = +25 CVS = 18 VVS = 15 VVS = 12 VVS = 9 VVS = 5V TPC 14. Maximum Output Voltage vs. Output Current (Source)+1 V0V 1 TO 10Hz PEAK-TO-PEAK NOISE TPC 17. Low Frequency Voltage NoiseTEMPERATURE ( C)SUPPLY CURRENT (mA)6 75 50125 250255075 100532104150VS = 15V TPC 12. Supply Current vs. TemperatureOUTPUT SINK CURRENT (mA) 2 12 4 6 8 10 OUTPUT VOLTAGE (V)TA = +25 CVS = 18 VVS = 15 VVS = 12 VVS = 9 VVS = 5V TPC 15.

9 Maximum Output Voltage vs. Output Current (Sink)+10 V0V 10 VNOTE: EXTERNAL Amplifier gain = 1000;THEREFORE, VERTICAL SCALE = 10 V/DIV. TPC 18. Voltage Noise from 0 kHz to 1 kHzAMP03 6 REV. FECM+ F VVSIGNALGROUND REFERENCE 1 GROUND REFERENCE 2(GROUND REFERENCE 2)VOUT = VSIGNALAMP03 Figure 1. AMP03 Serves to Reject Common-Mode Volt- ages in Instrumentation Systems. Common-Mode Volt- ages Occur Due to Ground Current Returns. VSIGNAL and ECM Must Be within the Common-Mode Range of INFORMATIONThe AMP03 represents a versatile analog building block. Inorder to capitalize on the fast settling time, high slew rate, andhigh CMR, proper decoupling and grounding techniques mustbe employed. Figure 1 illustrates the use of F decouplingcapacitors and proper ground COMMON-MODE REJECTIONIn order to achieve the full common-mode rejection capabilityof the AMP03 , the source impedance must be carefully con-trolled.

10 Slight imbalances of the source resistance will result ina degradation of dc CMR even a 5 imbalance will degradeCMR by 20 dB. Also, the matching of the reactive sourceimpedance must be matched in order to preserve the CMRR over CIRCUITSAMP03R125k R225k R325k R425k +IN E2 IN E1E0 = E2 E1 Figure 2. precision Difference Amplifier . Rejects Common-Mode Signal = (E1 + E2)/2 by 100 dBAMP03E1E0 = E1 Figure 3. precision Unity-Gain Inverting AmplifierAMP03+15V 10V FREF10+10V OUTF igure 4. 10 V precision Voltage Reference+15V 5V FREF10+5V OUTAMP03 Figure 5. 5 V precision Voltage ReferenceAMP03E1E2E0 = E1 + E2 Figure 6. precision Summing AmplifierAMP03R2R1E1E2E0 = (R2/R1+1)E1 = E22 Figure 7. precision Summing Amplifier with GainAMP03 7 REV. FSystem DesignSuggested Op AmpRequirementFor A1 and A2 Source Impedance Low, Need LowOP27, OP37 Voltage Noise PerformanceOP227 (Dual Matched)OP270 (Dual)OP271OP470OP471 Source Impedance HighOP80(RS 15 k ).