Precision Fixed Current Source
A common requirement for measurement applications or powering sensors is the provision of a highly accurate, highly stable fixed current. Eliminating the need to measure the supplied current by ensuring an accurate supply can greatly increase measurement accuracy, reduce measurement noise and simplify the measurement setup.
In spite of these benefits, the availability of such a supply, and in particular multiple such supplies, in a compact and convenient form factor outside of a bulky, cumbersome and expensive precision benchtop lab supply, is not commonplace.
Our precision fixed current source accepts any regular dc input such as from a cheap and ubiquitous “wall wart” adapter and generates one to three channels of ultrahigh precision fixed (factory-set) current output.
The unit can be equipped with any choice of input and output connectors suited to your application. Standard options are listed below.
| Input | 5*–24 Vdc, 5.5 mm barrel jack, 2.5 mm positive pin |
| Output | 0.5–200 mA (fixed single value per channel), 0.1" header |
| Setpoint accuracy | Better than 1% |
| Current regulation | 10 ppm per volt typical |
| Channels | 1–3 (more on request) |
| Size | 60 × 65 × 30 mm (l × w × h) approx. |
| CS-1 | Single-channel fixed current source | £350 |
| CS-2 | Dual-channel fixed current source | £450 |
| CS-3 | Three-channel fixed current source | £500 |