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LT1491

Features: Rail-to-Rail Input and Output Single Supply Input Range: 0.4V to 44V Micropower: 50µA/Amplifier Max 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 ...

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SeekIC No. : 004400622 Detail

LT1491: Features: Rail-to-Rail Input and Output Single Supply Input Range: 0.4V to 44V Micropower: 50µA/Amplifier Max Specified on 3V, 5V and ±15V Supplies High Output Current: 20mA Output Drives 10,...

LT1491 Data Sheet

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Part Number:
LT1491
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/20

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Product Details

Description



Features:

Rail-to-Rail Input and Output
Single Supply Input Range: 0.4V to 44V
Micropower: 50µA/Amplifier Max
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


Application

Battery- or Solar-Powered SystemsPortable InstrumentationSensor Conditioning
Supply Current Sensing
Battery Monitoring
Micropower Active Filters
4mA to 20mA Transmitters


Pinout

Connection Diagram




Specifications

Junction Temperature ........................................... 150°C
Specified Temperature Range (Note 2) .. 40°C to 85°C
Storage Temperature Range ................65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
Total Supply Voltage (V+ to V) ................................ 44V
Input Differential Voltage ........................................... 44V
Input Current ........................................................ ±25mA
Output Short-Circuit Duration (Note 1) .............Continuous
Operating Temperature Range ............... 40°C to 85°C


Description

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 supply up to 18V. The input range of the LT1490/LT1491 includes both supplies and the output swings to bothsupplies. Unlike most micropower op amps, the devices can drive heavy loads; their rail-to-rail outputs drive20mA. The LT1490/LT1491 are unity-gain stable and drive allcapacitive loads up to 10,000pF when optional 0.22µF and150Ω compensation is used.

The LT1490/LT1491 have a unique input stage that oper-ates and remains high impedance when above the positivesupply. The inputs take 44V both differential and commonmode even when operating on a 3V supply. Built-in resis-tors protect the inputs for faults below the negative supplyup to 22V.

There is no phase reversal of the output for inputs22V below V or 44V above V, independent of V+.

The LT1490 dual op amp is available in the 8-pin SO andPDIP packages. The quad LT1491 is available in the 14-pinSO and PDIP packages.




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