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7Semi LMV358A Automotive-Grade Op Amp Breakout Board with 2-Stage Rail-to-Rail Output and Adjustable Signal Gain
The 7Semi LMV358A breakout board is a compact, ready-to-use evaluation and prototyping platform built around the LMV358A-Q1 automotive operational amplifier from Texas Instruments. Configured as a 2-stage amplifier with a total gain of 100 (10x per stage), the board operates from a standard 5 V supply and is well-suited for signal conditioning, sensor interfacing, and low-impedance driving in both automotive and general-purpose embedded applications. An on-board trim pot allows fine adjustment of the inter-stage signal level, giving users precise control over the amplitude without altering the feedback path. Two feedback capacitors set the -3 dB bandwidth to 15.9 kHz for noise-limited applications; removing them extends the usable bandwidth to over 100 kHz for wider-band signal work.
The LMV358A-Q1 device at the heart of this board is AEC-Q100 Grade 1 qualified, making it suitable for deployment in harsh automotive environments. With a supply voltage range of 2.5 V to 5.5 V, rail-to-rail output swing, and the ability to source up to 160 mA, this op amp delivers strong dynamic range even on low-voltage single-supply rails. The input common-mode voltage range extends to the negative rail, which simplifies single-supply circuit design for current sensing, ADC driving, body electronics, and advanced driver assistance systems (ADAS). At 25 x 11 x 3.2 mm, the board fits easily into tight enclosures or on a breadboard for rapid prototyping.
Key Features
- Automotive Qualification: AEC-Q100 Grade 1 certified for use in safety-critical and high-reliability automotive systems
- 2-Stage Amplifier Configuration: Factory-configured with a total gain of 100 (10 per stage), ready to use without external components
- Adjustable Inter-Stage Level: On-board trim pot for signal-level tuning between stages, independent of the feedback path
- Selectable Bandwidth: Feedback capacitors limit bandwidth to 15.9 kHz; remove caps for greater than 100 kHz operation
- Rail-to-Rail Output Swing: Maximises dynamic range on low-voltage supplies from 2.5 V to 5.5 V
- High Output Current: Sources up to 160 mA, suitable for use as a low-impedance driver or buffer
- Wide Input Common-Mode Range: Extends to the negative rail, enabling straightforward single-supply and low-side sensing designs
- Unity-Gain Stable: No external compensation required for unity-gain buffer configurations
- Compact Form Factor: PCB dimensions of 25 x 11 x 3.2 mm for space-constrained designs
- ADC-Driver Ready: Rail-to-rail output is well-matched for driving sampling analog-to-digital converters directly
Applications
- Infotainment systems and instrument cluster signal conditioning
- Passive safety electronics (airbag control, seatbelt tensioners)
- Body electronics and automotive lighting control
- HEV/EV inverter and motor-control signal chains
- On-board charger (OBC) and wireless charger circuitry
- Powertrain current sensing (single-supply, low-side, unidirectional)
- Advanced driver assistance systems (ADAS) sensor front-ends
- General-purpose amplifier stages in 3.3 V and 5 V embedded systems
- Low-impedance signal buffering between high-output-impedance sensors and MCU ADC inputs
- Bandwidth-limited pre-amplifier stages for audio and industrial sensors
