LT1673 - 2uA Max, AV >=5 Dual Over-The-Top Precision Rail-to-Rail Input and Output Op Amps
Features
- Gain of 5 Stable
- Low Supply Current: 2µA Max per Amplifier
- Rail-to-Rail Input and Output
- Low Offset Voltage: 375µV Max
- Over-The-Top™ Inputs Operate Above V+
- Gain Bandwidth Product: 12kHz
- Wide Supply Range: 2.2V to 36V
- Single Supply Input Range: -0.3V to 36V
- Low Input Bias Current: 250pA
- Low Input Offset Current: 20pA
- High AVOL : 100V/mV Minimum Driving 100kOhms Load
- Output Sources and Sinks 500µA Load Current
- Reverse Battery Protected to 18V
Typical Application
Description
The LT®1672/LT1673/LT1674 are ultralow power (IS <=2µA) decompompensated (AV >=5) op amps with precision specifications. The extremely low supply current is combineed with excellent amplifier specifications: input offset voltage is 375µV maximum with atypicaal drift of only 0.4µV/°C, input offset current is 100pA maximum. A minimum open-loop gain (AVOL) of 100V/mV ensures that gain errors are small. The devices' characteristics change little over the supply range of 2.2V to ±15V. Supply rejection is 90dB and the common mode rejection ratio is 90dB. Operation is specified for 3V, 5V and ±15V supplies. Reverse battery protection (-18V min) and inputs that operate above the positive supply make the LT1672/LT1673/LT1674 easy to use in harsh environments.
The low bias currents and offset current of the amplifier permit the use of megohm level source resistors without introducing significant errors. Voltage noise at 4µVP-P is remarkably low considering the low supply current. For unity gain stable versions of these amplifiers, see the LT1494/LT1495/LT1496.
The LT1672 is available in the 8-pin MSOP, PDIP and SO packages. The LT1673 is available in plastic 8-pin PDIP and SO-8 packages with the standard dual op amp pinout. The LT1674 is available in 14-pin PDIP and SO 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 |
|---|---|---|---|---|---|
| LT1673CN8#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LT1673CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1673CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1673IN8#PBF | N-8 | N | I | 05-08-1510 (N8) | Yes |
| LT1673IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1673IS8#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 | |
|---|---|---|---|---|---|---|
| LT1673CN8#PBF | N-8 | C | $3.20 | $2.45 | Yes | |
| LT1673CS8#PBF | SO-8 | C | $3.30 | $2.55 | Yes | |
| LT1673CS8#TRPBF | SO-8 | C | $2.61 | Yes | ||
| LT1673IN8#PBF | N-8 | I | $3.70 | $2.90 | Yes | |
| LT1673IS8#PBF | SO-8 | I | $3.80 | $3.00 | Yes | |
| LT1673IS8#TRPBF | SO-8 | I | $3.06 | 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.Click here to view our complete list of demo boards
Applications
- Battery- or Solar-Powered Systems
- Portable Instrumentation
- Remote Sensor Amplifier
- Micropower Filter
- Photodiode Amplifier
- High Impedance Circuits
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LT1673
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.
