The LMH5485-SEP is a radiation tolerant, low-power, voltage-feedback, fully differential amplifier (FDA). This part is able to achieve a high gain bandwidth product (GBWP) of 850-MHz, allowing it to maintain excellent distortion performance over a wide range of frequencies as shown in the following figure. This wide bandwidth range is also achieved with a relatively low power consumption of 10.1-mA and broadband voltage noise of 2.4nV/√Hz. This combination of power consumption, bandwidth and noise allows the LMH5485-SEP to be well suited for power sensitive data acquisition systems with frequencies >10 MHz that require both the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR).
The LMH5485-SEP features the negative-rail input required when interfacing with a DC-coupled, ground-centered, source signal. This negative-rail input, with a rail-to-rail output, allows for easy interface between single-ended, ground-referenced, bipolar signal sources and a wide variety of successive approximation register (SAR), delta-sigma (ΔΣ), or pipeline ADCs using only a single 2.7 V to 5.4 V power supply. This device also features a low offset voltage drift of ±0.5 µV/°C, allowing it to maintain excellent DC performance over it’s wide temperature range of –55°C to +125°C.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LMH5485-SEP Radiation Tolerant, Negative Rail Input, Rail-to-Rail Output, Precision, 850 MHz Fully Differential Amplifier datasheet (Rev. A) | PDF | HTML | Nov 22, 2022 |
| * | Radiation & reliability report | LMH5485-SEP Production Flow and Reliability Report | PDF | HTML | Dec 12, 2022 |
| Technical article | How Space Enhanced Products Address Challenges in low Earth orbit Applications (Rev. A) | PDF | HTML | Dec 18, 2023 | |
| Circuit design | Space-Grade, SE-to-Diff ADC Driver Circuit Using a Fully-Differential Amplifier | PDF | HTML | Jun 15, 2023 | |
| Application brief | Analog Front-End Design With Texas Instruments’ Tooling Landscape | PDF | HTML | Mar 7, 2022 |
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The DEM-FDA-DGN-EVM is an unpopulated evaluation module (EVM) for fully differential amplifiers (FDA) in the DGN (HVSSOP) package. The EVM is designed to enable quick and efficient lab testing of the high-speed FDAs using 50-Ω SMA connectors for use with lab equipment. The schematic (...)
The DEM-FDA-SOIC-EVM is an unpopulated evaluation module (EVM) for fully differential amplifiers (FDA) in the D (SOIC) package. The EVM is designed to enable quick and efficient lab testing of the high-speed FDAs using 50-Ω SMA connectors for use with lab equipment. The schematic (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
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