What this part is and where it fits
The Texas Instruments LM2907MX/NOPB is a frequency-to-voltage converter IC that takes a variable-frequency input signal — from a magnetic pickup, optical tachometer, or logic-level pulse train — and outputs a DC voltage proportional to the input frequency. It is a classic tachometer building block for speed sensing, rate metering, and frequency-to-analog conversion in industrial controls, automotive instrumentation, and motor-drive feedback loops.
Key ratings and what they mean for the BOM
The 10 kHz maximum input frequency sets the practical upper bound for the pulse train this part can convert linearly. The ±0.3% linearity spec means the output voltage tracks the input frequency within that error band across the full 10 kHz span.
Package and mounting
The 14-SOIC package is a low-thermal-mass body — it heats up fast under a hot-air pencil, and the leads are exposed enough to wet with a fine-tip iron for touch-up. No hidden pads, no thermal pad underneath that wicks heat into the board. The 0.154-inch width is the narrow SOIC variant, which matches the common 3.90 mm body width.
Lifecycle and compliance
It is also RoHS3 compliant, so it meets the current EU restriction limits on lead and other substances. For new designs, this part is a safe choice without near-term supply risk. For legacy BOM lines, the active status means you can replenish without scrambling for surplus stock.