LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps
Features
- Low Input Offset Voltage: 500µV Max
- Output Swings to 10mV Max from V –
- Rail-to-Rail Input and Output
- Micropower: 50µA/Amplifier Max
- Over-The-Top® 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
- Tiny 3mm × 3mm × 0.8mm DFN Package
AEC-Q100 data available for specific packages
Typical Application
Description
The LT1490A/LT1491A are dual and quad op amps with a low input offset voltage of 500µV max. The LT1490A/LT1491A operate on all single and split supplies with a total voltage of 2V to 44V, drawing only 40µA 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 0.22µF and 150Ω 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. For space limited applications LT1490A is available in a 3mm × 3mm × 0.8mm, dual fine pitch leadless package (DFN). The quad LT1491A is available in the 14-pin SO, PDIP and 5mm × 3mm × 0.8mm DFN packages.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT1490ACDD#PBF | 3x3 DFN-8 | DD | C | 05-08-1698 | Yes |
| LT1490ACDD#TRPBF | 3x3 DFN-8 | DD | C | 05-08-1698 | Yes |
| LT1490ACMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT1490ACMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT1490ACN8#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LT1490ACS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1490ACS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1490AHMS8#PBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LT1490AHMS8#TRPBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LT1490AHS8#PBF | SO-8 | S8 | H | 05-08-1610 (S8) | Yes |
| LT1490AHS8#TRPBF | SO-8 | S8 | H | 05-08-1610 (S8) | Yes |
| LT1490AIDD#PBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT1490AIDD#TRPBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT1490AIMS8#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT1490AIMS8#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT1490AIN8#PBF | N-8 | N | I | 05-08-1510 (N8) | Yes |
| LT1490AIS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1490AIS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1490ACDD#PBF | 3x3 DFN-8 | C | $3.39 | $2.20 | Yes | |
| LT1490ACDD#TRPBF | 3x3 DFN-8 | C | $2.25 | Yes | ||
| LT1490ACMS8#PBF | MS-8 | C | $2.45 | $2.10 | Yes | |
| LT1490ACMS8#TRPBF | MS-8 | C | $2.16 | Yes | ||
| LT1490ACN8#PBF | N-8 | C | $2.05 | $1.75 | Yes | |
| LT1490ACS8#PBF | SO-8 | C | $2.15 | $1.85 | Yes | |
| LT1490ACS8#TRPBF | SO-8 | C | $1.91 | Yes | ||
| LT1490AHMS8#PBF | MS-8 | H | $3.15 | $2.60 | Yes | |
| LT1490AHMS8#TRPBF | MS-8 | H | $2.66 | Yes | ||
| LT1490AHS8#PBF | SO-8 | H | $2.70 | $2.30 | Yes | |
| LT1490AHS8#TRPBF | SO-8 | H | $2.36 | Yes | ||
| LT1490AIDD#PBF | 3x3 DFN-8 | I | $3.93 | $2.60 | Yes | |
| LT1490AIDD#TRPBF | 3x3 DFN-8 | I | $2.65 | Yes | ||
| LT1490AIMS8#PBF | MS-8 | I | $2.90 | $2.50 | Yes | |
| LT1490AIMS8#TRPBF | MS-8 | I | $2.56 | Yes | ||
| LT1490AIN8#PBF | N-8 | I | $2.45 | $2.10 | Yes | |
| LT1490AIS8#PBF | SO-8 | I | $2.55 | $2.20 | Yes | |
| LT1490AIS8#TRPBF | SO-8 | I | $2.26 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC591A | LT1490ACDD | Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp in DFN package | $50.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1490AHMS8#PBF | MS-8 | H | $3.15 | $2.60 | Yes | |
| LT1490AHMS8#TRPBF | MS-8 | H | $2.66 | Yes | ||
| LT1490AIDD#PBF | 3x3 DFN-8 | I | $3.93 | $2.60 | Yes | |
| LT1490AIDD#TRPBF | 3x3 DFN-8 | I | $2.65 | Yes | ||
| LT1490AIMS8#PBF | MS-8 | I | $2.90 | $2.50 | Yes | |
| LT1490AIMS8#TRPBF | MS-8 | I | $2.56 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning - Supply Current Sensing
- Battery Monitoring
- Micropower Active Filters
- 4mA to 20mA Transmitters
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LT1490
LT1490A
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
