The ADL5315 is a wide input current range, precision high-side current mirror featuring a stable and user-adjustable input current limit, single-supply operation range of 2.7 V to 8 V, and miniature 8-lead LFCSP (2 mm × 3 mm) package. It is suitable for applications such as optical power monitoring, general voltage biasing with precision current monitoring, and voltage-to-current conversion.
The ADL5315 precision high‑side current mirror provides a 1:1 current ratio over six decades (3 nA to 3 mA) with a stable, user‑adjustable input voltage. It is optimized for PIN photodiodes but suitable for many voltage‑bias and current‑monitoring applications.
The device operates from a single 2.7 V‑8 V supply, includes adjustable input current limiting via an external resistor, and is offered in a miniature 2 mm × 3 mm 8‑lead LFCSP package. Absolute maximum ratings, ESD precautions, and detailed pin functions are provided.
| Nonlinearity (3 nA‑3 mA) | 0.25 % |
|---|---|
| Small‑Signal Bandwidth | 1 kHz |
| Wideband Noise | 20 nA rms |
| Quiescent Current typical | 2.2 mA |
| Package | 8‑lead LFCSP (2 mm × 3 mm) |
The ADL5315 accepts an input current from 3 nA to 3 mA.
An external resistor (RLIM) to VPOS sets the input current limit between 1 mA and 16 mA.
The device is supplied in an 8‑lead LFCSP package measuring 2 mm × 3 mm.