LT1490A/LT1491A - Dual/Quad Over-The-Top Micropower …

1 LT1490A/LT1491A114901afd TYPICAL APPLICATION FEATURES DESCRIPTIONDual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op AmpsThe LT 1490A/LT1491A are dual and quad op amps with a low input offset voltage of 500 V max. The LT1490A/LT1491A operate on all single and split supplies with a total voltage of 2V to 44V, drawing only 40 A of quiescent current per ampli -fier. These amplifiers are reverse supply protected; they draw virtually no current for reverse supply up to 18V. The input range of the LT1490A/LT1491A includes both supplies and the output swings to both supplies. Unlike most Micropower op amps, the LT1490A/LT1491A can drive heavy loads; their rail-to-rail outputs drive 20mA. The LT1490A/LT1491A are unity-gain stable and drive all capacitive loads up to 10,000pF when optional F and 150 compensation is LT1490A/LT1491A have a unique input stage that oper-ates and remains high impedance when above the positive supply .

2 The inputs take 44V both differential and common mode even when operating on a 3V supply . Built-in resistors protect the inputs for faults below the negative supply up to 15V. There is no phase reversal of the output for inputs 15V below V or 44V above V , independent of V+. The LT1490A dual op amp is available in the 8-pin MSOP, PDIP and SO packages. For space limited applications LT1490A is available in a 3mm 3mm , dual fine pitch leadless package (DFN). The quad LT1491A is available in the 14-pin SO, PDIP and 5mm 3mm DFN Monitor APPLICATIONSn Low Input Offset Voltage: 500 V Maxn Output Swings to 10mV Max from V n Rail-to-Rail Input and Outputn Micropower : 50 A/Amplifier Maxn Over-The-Top Input Common Mode Range Extends 44V Above V , Independent of V+n Specified on 3V, 5V and 15V Suppliesn High Output Current: 20mAn Output Drives 10,000pF with Output Compensationn Reverse Battery Protection to 18Vn No supply Sequencing Problemsn High Voltage Gain: 1500V/mVn High CMRR: 98dBn No Phase Reversaln Gain Bandwidth Product.

3 200kHzn Tiny 3mm 3mm DFN Packagen Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioningn supply Current Sensingn Battery Monitoringn Micropower Active Filtersn 4mA to 20mA TransmittersL, LT, LTC, LTM, Over-The-Top , Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by Patents including 5825228. + +RA2kQ22N3904S1S1 = OPEN, GAIN = 1S1 = CLOSED, GAIN = 10RA = RBVS = 5V, TA01 LOGIC HIGH (5V) = CHARGINGLOGIC LOW (0V) = CHARGERVOLTAGE1/4 LT1491A1/4 LT1491 ARA 2kRB2kVBATT = 12 VIBATT+RB 2kLOAD + +VOUT(RS)(RG/RA)(GAIN)VOUTGAINIBATT = = AMPS 1/4 LT1491A1/4 LT1491 ALT1490A/LT1491A214901afdLT1490 ALT1490 ALT1490A1234 OUT A IN A+IN AV 8765V+OUT B IN B+IN BTOP VIEWMS8 PACKAGE8-LEAD PLASTIC MSOPABTJMAX = 150 C, JA = 250 C/W12348765 TOP VIEWN8 PACKAGE8-LEAD PDIPS8 PACKAGE8-LEAD PLASTIC SOV+OUT B IN B+IN BABOUT A IN A+IN AV TJMAX = 150 C, JA = 130 C/W (N8)TJMAX = 150 C, JA = 190 C/W (S8)TOP VIEWDD PACKAGE8-LEAD (3mm w 3mm) PLASTIC DFN56784321 OUT A IN A+IN AV V+OUT B IN B+IN BABTJMAX = 125 C, JA = 160 C/W (NOTE 2)

4 UNDERSIDE METAL CONNECTED TO V LT1491 ALT1491 ATOP VIEWS PACKAGE14-LEAD PLASTIC SON PACKAGE14-LEAD PDIP1234567141312111098 OUT A IN A+IN AV++IN B IN BOUT BOUT D IN D+IN DV +IN C IN COUT CADBCTJMAX = 150 C, JA = 110 C/W (N)TJMAX = 150 C, JA = 150 C/W (S)16151413121110912345678 OUT D IN D+IN DV +IN C IN COUT CNCOUT A IN A+IN AV++IN B IN BOUT BNCTOP VIEWDHC16 PACKAGE16-LEAD (5mm w 3mm) PLASTIC DFNADBCTJMAX = 125 C, JA = 160 C/W (NOTE 2)UNDERSIDE METAL CONNECTED TO V ABSOLUTE MAXIMUM RATINGST otal supply Voltage (V+ to V ) .. 44 VDifferential Input Voltage .. 44 VInput Current (Note 9) .. 12mAOutput Short-Circuit Duration (Note 2) .. ContinuousOperating Temperature Range (Note 3) LT1490AC/LT1491AC .. 40 C to 85 C LT1490AI/LT1491AI .. 40 C to 85 C LT1490AH/LT1491AH .. 40 C to 125 C(Note 1) PIN CONFIGURATIONS pecified Temperature Range (Note 4) LT1490AC/LT1490AI.

5 40 C to 85 C LT1491AC/LT1491AI .. 40 C to 85 C LT1490AH/LT1491AH .. 40 C to 125 CJunction Temperature .. 150 CJunction Temperature (DD/DHC Package) .. 125 CStorage Temperature Range .. 65 C to 150 CStorage Temperature Range DD/DHC Package .. 65 C to 125 CLead Temperature (Soldering, 10 sec) .. 300 C LT1490A/LT1491A314901afd ORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONSPECIFIED TEMPERATURE RANGELT1490 ACMS8#PBFLT1490 ACMS8#TRPBFLTNG8-Lead Plastic MSOP0 C to 70 CLT1490 AIMS8#PBFLT1490 AIMS8#TRPBFLTPU8-Lead Plastic MSOP 40 C to 85 CLT1490 AHMS8#PBFLT1490 AHMS8#TRPBFLTRK8-Lead Plastic MSOP 40 C to 125 CLT1490 ACS8#PBFLT1490 ACS8#TRPBF1490A8-Lead Plastic SO0 C to 70 CLT1490 AIS8#PBFLT1490 AIS8#TRPBF1490AI8-Lead Plastic SO 40 C to 85 CLT1490 AHS8#PBFLT1490 AHS8#TRPBF1490AH8-Lead Plastic SO 40 C to 125 CLT1490 ACN8#PBFLT1490 ACN8#TRPBFLT1490 ACN88-Lead PDIP0 C to 70 CLT1490 AIN8#PBFLT1490 AIN8#TRPBFLT1490 AIN88-Lead PDIP 40 C to 85 CLT1490 ACDD#PBFLT1490 ACDD#TRPBFLAAH8-Lead (3mm 3mm) Plastic DFN0 C to 70 CLT1490 AIDD#PBFLT1490 AIDD#TRPBFLAAH8-Lead (3mm 3mm)

6 Plastic DFN 40 C to 85 CLT1491 ACS#PBFLT1491 ACS#TRPBFLT1491 ACS14-Lead Plastic SO0 C to 70 CLT1491 AIS#PBFLT1491 AIS#TRPBFLT1491 AIS14-Lead Plastic SO 40 C to 85 CLT1491 AHS#PBFLT1491 AHS#TRPBFLT1491 AHS14-Lead Plastic SO 40 C to 125 CLT1491 ACN#PBFLT1491 ACN#TRPBFLT1491 ACN14-Lead PDIP0 C to 70 CLT1491 AIN#PBFLT1491 AIN#TRPBFLT1491 AIN14-Lead PDIP 40 C to 85 CLT1491 ACDHC#PBFLT1491 ACDHC#TRPBF1491A16-Lead (5mm 3mm) Plastic DFN0 C to 70 CLT1491 AIDHC#PBFLT1491 AIDHC#TRPBF1491A16-Lead (5mm 3mm) Plastic DFN 40 C to 85 CConsult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping LTC Marketing for information on non-standard lead based finish more information on lead free part marking, go to: For more information on tape and reel specifications, go to: ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range of 40 C TA 85 C, otherwise specifications are at TA = 25 C.

7 VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise noted. (Note 4)SYMBOLPARAMETERCONDITIONSLT1490AC/LT14 91 ACLT1490AI/LT1491 AIUNITSMINTYPMAXVOSI nput Offset Voltage (Note 5)LT1490A N, S Packages0 C TA 70 C 40 C TA 85 Cll110500700800 V V VLT1490A MS8 Package, LT1491A N, S Packages0 C TA 70 C 40 C TA 85 Cll220100012001400 V V VLT1490A DD, LT1491A DHC0 C TA 70 C 40 C TA 85 C ll250120014001600 V V VInput Offset Voltage Drift (Note 9) 40 C TA 85 CLT1490A DD, LT1491A DHC, 40 C TA 85 Cll2246 V/ C V/ CIOSI nput Offset CurrentVCM = 44V (Note 6) AIBI nput Bias CurrentVCM = 44V (Note 6)VS = AnAInput Bias Current Drift 40 C TA 85 Cl2pA/ CInput Noise to 10Hz1 VP-PenInput Noise Voltage Densityf = 1kHz 50nV/ HzinInput Noise Current Densityf = HzRINI nput ResistanceDifferentialCommon Mode, VCM = 0V to 44V641711M M CINI nput Voltage Rangel044 VCMRRC ommon Mode Rejection Ratio (Note 6)

8 VCM = 0V to VCC 1 VVCM = 0V to 44 Vll84809898dBdBAVOLL arge-Signal Voltage GainVS = 3V, VO = 500mV to , RL = 10k0 C TA 70 C 40 C TA 85 C ll2001331001500V/mVV/mVV/mVVS = 5V, VO = 500mV to , RL = 10k0 C TA 70 C 40 C TA 85 Cll4002502001500V/mVV/mVV/mVVOLO utput Voltage Swing LowVS = 3V, No LoadVS = 3V, ISINK = 5mAll325010450mVmVVS = 5V, No LoadVS = 5V, ISINK = 5mAVS = 5V, ISINK = 10mAll325033010500500mVmVmVVOHO utput Voltage Swing HighVS = 3V, No LoadVS = 3V, ISOURCE = = 5V, No LoadVS = 5V, ISOURCE = Current (Note 2)VS = 3V, Short to GNDVS = 3V, Short to VCC10101530mAmAVS = 5V, Short to GNDVS = 5V, Short to VCC15152530mAmALT1490A/LT1491A514901afdE LECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range of 40 C TA 85 C, otherwise specifications are at TA = 25 C.

9 VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise noted. (Note 4)The denotes specifications which apply over the full operating temperature range of 40 C TA 85 C, otherwise specifications are at TA = 25 C. VS = 15V, VCM = 0V, VOUT = 0V unless otherwise noted. (Note 4)SYMBOLPARAMETERCONDITIONSLT1490AC/LT14 91 ACLT1490AI/LT1491 AIUNITSMINTYPMAXPSRRP ower supply Rejection RatioVS = to , VCM = VO = 1V l8498dBMinimum Operating supply supply VoltageIS = 100 A per Amplifierl1827 VISS upply Current per Amplifier (Note 7)l405055 A AGBWGain Bandwidth Product(Note 6)f = 1kHz0 C TA 70 C 40 C TA 85 Cll11010090180kHzkHzkHzSRSlew Rate(Note 8)AV = 1, RL = 0 C TA 70 C 40 C TA 85 sV/ sV/ sSYMBOLPARAMETERCONDITIONSLT1490AC/LT149 1 ACLT1490AI/LT1491 AIUNITSMINTYPMAXVOSI nput Offset Voltage (Note 5)LT1490A N, S Packages0 C TA 70 C 40 C TA 85 Cll1507009501100 V V VLT1490A MS8 Package, LT1491A N, S Packages0 C TA 70 C 40 C TA 85 Cll250120013501500 V V VLT1490A DD, LT1491A DHC0 C TA 70 C 40 C TA 85 Cll285140015501700 V V V Input Offset Voltage Drift (Note 9)

10 40 C TA 85 CLT1490A DD, LT1491A DHC, 40 C TA 85 Cll2267 V/ C V/ CIOSI nput Offset Bias Currentl18nAInput Bias Current Drift 40 C TA 85 Cl5pA/ CInput Noise to 10Hz1 VP-PenInput Noise Voltage Densityf = 1kHz 50nV/ HzinInput Noise Current Densityf = HzRINI nput ResistanceDifferentialCommon Mode, VCM = 15V to 14V61715000M M CINI nput Voltage Rangel 1529 VCMRRC ommon Mode Rejection RatioVCM = 15V to 29Vl8098dBAVOLL arge-Signal Voltage GainVO = 14V, RL = 10k0 C TA 70 C 40 C TA 85 Cll1007550250V/mVV/mVV/mVVOO utput Voltage SwingNo LoadIOUT = 5mAIOUT = 10mAll CHARACTERISTICS The denotes specifications which apply over the full operating temperature range of 40 C TA 85 C, otherwise specifications are at TA = 25 C.