Purchase LT1491A, In-stock LT1491A From SeekIC.
Part Number: LT1491A
Description: The LT®1490A/LT1491A are enhanced versions of the popular LT1490/LT1491 dual and quad o...
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LT1491A
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DataSheet
General Description
LT1491A General Description
The LT®1490A/LT1491A are enhanced versions of the popular LT1490/LT1491 dual and quad op amps with improved
input offset voltage (500 V max) and output voltage swing (10mV max from V). They are recommended as replacements for the LT1490/LT1491 in all new designs. 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 amplifier. 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 0.22 F and 150 compensation is used.
The LT1490A/LT1491A have a unique input stage that operates and remains high impedance when above the positive
supply. 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. The quad LT1491A is available in the 14-pin SO and PDIP packages.
LT1491A Maximum Ratings
Total Supply Voltage (V + to V ) ............................... 44V
Differential Input Voltage ........................................... 44V
Input Current ....................................................... ±12mA
Output Short-Circuit Duration (Note 2) .......... Continuous
Operating Temperature Range (Note 3)
LT1490AC/LT1491AC .............................. 40 to 85
LT1490AI/LT1491AI ................................ 40 to 85
LT1490AH/LT1491AH ............................ 40 to 125
Specified Temperature Range (Note 4)
LT1490AC/LT1490AI ............................... 40 to 85
LT1491AC/LT1491AI ............................... 40 to 85
LT1490AH/LT1491AH ............................ 40 to 125
Junction Temperature ............................................. 150
Storage Temperature Range .................. 65 to 150
Lead Temperature (Soldering, 10 sec).................... 300
Differential Input Voltage ........................................... 44V
Input Current ....................................................... ±12mA
Output Short-Circuit Duration (Note 2) .......... Continuous
Operating Temperature Range (Note 3)
LT1490AC/LT1491AC .............................. 40 to 85
LT1490AI/LT1491AI ................................ 40 to 85
LT1490AH/LT1491AH ............................ 40 to 125
Specified Temperature Range (Note 4)
LT1490AC/LT1490AI ............................... 40 to 85
LT1491AC/LT1491AI ............................... 40 to 85
LT1490AH/LT1491AH ............................ 40 to 125
Junction Temperature ............................................. 150
Storage Temperature Range .................. 65 to 150
Lead Temperature (Soldering, 10 sec).................... 300
LT1491A Features
` Low Input Offset Voltage: 500mV Max
` Output Swings to 10mV Max from V
` Rail-to-Rail Input and Output
` Micropower: 50mA/Amplifier Max
` MSOP Package
` Over-The-TopTM Input Common Mode Range Extends 44V Above V , Independent of V +
` Specified on 3V, 5V and ±15V Supplies
` High Output Current: 20mA
` Output Drives 10,000pF with Output Compensation
` Reverse Battery Protection to 18V
` No Supply Sequencing Problems
` High Voltage Gain: 1500V/mV
` High CMRR: 98dB
` No Phase Reversal
` Gain Bandwidth Product: 200kHz
` Output Swings to 10mV Max from V
` Rail-to-Rail Input and Output
` Micropower: 50mA/Amplifier Max
` MSOP Package
` Over-The-TopTM Input Common Mode Range Extends 44V Above V , Independent of V +
` Specified on 3V, 5V and ±15V Supplies
` High Output Current: 20mA
` Output Drives 10,000pF with Output Compensation
` Reverse Battery Protection to 18V
` No Supply Sequencing Problems
` High Voltage Gain: 1500V/mV
` High CMRR: 98dB
` No Phase Reversal
` Gain Bandwidth Product: 200kHz
LT1491A Typical Application
· Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning
·Supply Current Sensing
· Battery Monitoring
·Micropower Active Filters
· 4mA to 20mA Transmitters
·Supply Current Sensing
· Battery Monitoring
·Micropower Active Filters
· 4mA to 20mA Transmitters
LT1491A Connection Diagram
LT1491A
PDF/DataSheet Download
- Datasheet: LT1491A
- File Size: 228655 KB
- Manufacturer: Linear
- Click here to Download
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LT1491A Relative Products
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The dual LT®1490 and quad LT1491 op amps operate on allsingle and split supplies with a total voltage of 2V to 44Vdrawing only 40µA of quiescent current per amplifier. Theseamplifiers are reverse supply protected; they draw no currentfor reverse su...
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