The AD1580 is a low cost, 2-terminal (shunt), precision band gap reference. It provides an accurate 1.225 V output for input currents between 50 μA and 10 mA, with an initial accuracy of ±0.1% maximum.
The AD1580 provides a stable 1.225 V output over a 50 pA‑10 mA current range. It features a 0.5 Ω maximum output impedance, 20 µV rms noise (10 Hz‑10 kHz) and a temperature drift of 50 ppm/°C. The device is supplied in compact SOT‑23 and SC70 surface‑mount packages and includes a 4 kV human‑body‑model ESD rating.
Typical applications include portable battery‑powered equipment, cellular phones, notebook computers, GPS units, industrial transmitters and PCMCIA cards. The reference can be used as a shunt regulator by adding an external series resistor, and noise can be further reduced with a simple low‑pass filter.
| Reverse Voltage Output (SOT‑23) typical | 1.225 V |
|---|---|
| Reverse Voltage Output (SC70) typical | 1.225 V |
| Output Noise (10 Hz‑10 kHz) | 20 µV rms |
| Low‑Frequency Noise (0.1 Hz‑10 Hz) | 5 µV p‑p |
| Turn‑On Settling Time (to 0.1 %) | 5 µs |
| Operating Temperature Range | –40 °C to +85 °C |
| ESD Rating (Human Body Model) | 4 kV |
| ESD Rating (Machine Model) | 400 V |
The typical output voltage is 1.225 V.