The AD589 is a 2-terminal, low-cost, temperature-compensated bandgap voltage reference that provides a fixed 1.23V output voltage for input currents between 50μA and 5mA. The high stability of the AD589 is primarily dependent upon the matching and thermal tracking of the on-chip components. Analog Devices’ precision bipolar processing and thin-film technology combine to provide excellent performance at low cost. Additionally, the active circuit produces an output impedance of 0.6Ω, eliminating the need for frequency compensation.
The AD589 is a 2‑terminal, temperature‑compensated band‑gap voltage reference that delivers a fixed 1.23 V output over input currents from 50 pA to 5 mA. It offers low output impedance (0.6 Ω), low noise, and a temperature coefficient as low as 10 ppm/°C, making it suitable for battery‑powered instruments and CMOS ADC references.
The device is available in several grades (J, K, L, M, S, T) covering temperature ranges from 0 °C to +70 °C or –55 °C to +125 °C, in metal‑can (H‑02) and SOIC‑8 (R‑8) packages. The datasheet includes electrical specifications, absolute maximum ratings, ordering information, and example application circuits.
| Typical Output Voltage | 1.235 V |
|---|---|
| Dynamic Output Impedance | 0.6 Ω |
| Temperature Coefficient | 10 ppm/°C |
The typical output voltage is 1.235 V at 25 °C.
The AD589 has a temperature coefficient of 10 ppm/°C.
The device features a low output impedance of 0.6 Ω.