Texas Instruments LM4140ACM-2.5/NOPB series voltage reference, fixed 2.5V output, ±0.1% tolerance, 3ppm/°C temperature coefficient, 2.2µVp-p noise (0.1Hz to 10Hz), 8 mA output, 375µA supply, 8-SOIC surface mount, 0°C to 70°C.
| Parameter | Value |
|---|---|
| Output type | Fixed |
| Mounting type | Surface Mount |
| Reference type | Series |
| Voltage - input | 1.8V ~ 5.5V |
| Voltage - output (Min (Fixed)) | 2.5V |
| Current - output | 8 mA |
| Current - supply | 375µA |
| Operating temperature | 0°C ~ 70°C (TA) |
| Package | Tube |
| Tolerance | ±0.1% |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Noise - 0.1Hz to 10Hz | 2.2µVp-p |
| Temperature coefficient | 3ppm/°C |
The 375 µA supply current is the quiescent draw from the input rail; it stays on even when the output is unloaded. In a battery-powered instrument that spends most of its time asleep, this reference is always consuming that current — factor it into the sleep budget if the reference stays enabled.
The LM4140ACM-2.5/NOPB carries an Active lifecycle status and is ROHS3 compliant. No last-time-buy or obsolescence notice is in effect.
Initial accuracy is ±0.1% at 25 °C. Temperature drift is 3 ppm/°C, and output noise is 2.2 µVp-p from 0.1 Hz to 10 Hz.
A higher-accuracy sibling is the LM4132AMF-4.1/NOPB, which offers ±0.05% tolerance and a wider temperature range of -40°C to 125°C, but its output is 4.096 V and noise is higher at 350 µVp-p. The LM4140ACM-2.5/NOPB is the better fit for a 2.5 V rail with low noise and low drift.
Yes, it is ROHS3 Compliant.
Noise is 2.2 µVp-p over the 0.1 Hz to 10 Hz bandwidth.