Key facts
- Brand
- Linear Technology
- Model
- LT1991
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-05-08
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LINEAR TECHNOLOGY LT1991 Precision 100 A Gain Selectable Ampli er handbook
The LT1991 combines a precision operational amplifier with eight on‑chip resistors to provide selectable gains from –13 to 14 without external components. It offers a CMRR greater than 75 dB, a gain‑bandwidth product of 560 kHz, and a maximum input offset voltage of 50 µV. The device operates from 2.7 V to 36 V and draws only 100 pA supply current at 5 V.
Typical applications include handheld instrumentation, medical instrumentation, strain‑gauge amplifiers, and single‑ended conversion. The part is offered in space‑saving 10‑lead MSOP and low‑profile 3 mm × 3 mm DFN packages.
Linear Technology LT1991 specifications
| Gain range (difference amplifier) | 1 to 13 |
|---|---|
| Supply voltage range | 2.7 V to 36 V |
| Supply current (5 V) | 100 pA |
| Gain‑bandwidth product | 560 kHz |
| CMRR | >75 dB |
| Output swing | ±40 mV from either rail |
| Package options | 10‑lead MSOP, 3 mm × 3 mm DFN |
Source: LINEAR TECHNOLOGY LT1991 Precision 100 A Gain Selectable Ampli er handbook
All Linear Technology LT1991 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the gain range of the LT1991 in difference‑amplifier mode?
The LT1991 provides a gain range of 1 to 13 in the difference‑amplifier configuration.
From: LINEAR TECHNOLOGY LT1991 Precision 100 A Gain Selectable Ampli er handbook
How much supply current does the LT1991 draw at 5 V?
It draws only 100 pA of supply current when powered from a 5 V supply.
From: LINEAR TECHNOLOGY LT1991 Precision 100 A Gain Selectable Ampli er handbook
What is the supply voltage range for the LT1991?
The device operates from any supply voltage between 2.7 V and 36 V.
From: Linear Technology LT1991 Precision 100µA Gain Selectable Amplifier Datasheet
What is the gain‑bandwidth product of the LT1991?
The gain‑bandwidth product is 560 kHz.
From: Linear Technology LT1991 Precision 100µA Gain Selectable Amplifier Datasheet