The document introduces a single-channel, 1024-position digital rheostat with SPI interface and 50-TP memory. It has a nominal resistance of 10 kΩ and can operate with a single supply voltage of 2.7 V to 5.5 V, or dual supply voltages of ±2.5 V to ±2.75 V for AC or bipolar operations. The product is suitable for applications such as mechanical rheostat replacements, variable gain control in op-amps, gain and offset adjustment in instrumentation, programmable voltage-to-current conversions, programmable filters, delays, and time constants, programmable power supplies, and sensor calibration.
The AD5174 is a single‑channel, 1024‑position digital rheostat that provides high‑resolution variable resistance with a 10‑bit resolution and a nominal 10 kΩ resistance. It features a 50‑times programmable (50‑TP) non‑volatile memory, a temperature coefficient of 35 ppm/°C, and operates from either a single‑supply (2.7 V to 5.5 V) or dual‑supply (±2.5 V to ±2.75 V) voltage range. The device is offered in thin‑profile 10‑lead LFCSP and MSOP packages.
Typical applications include replacing mechanical rheostats, providing variable gain control for op‑amps, sensor calibration, programmable voltage‑to‑current conversion, and programmable filters. The datasheet includes functional block diagrams, pin configurations, timing specifications, absolute maximum ratings, and test circuits to aid designers in integrating the part into their systems.
| Resolution | 10 Bits |
|---|---|
| Nominal Resistance | 10 kΩ |
| Temperature Coefficient | 35 ppm/°C |
| Single‑Supply Voltage Range | 2.7 V to 5.5 V |
| Dual‑Supply Voltage Range | ±2.5 V to ±2.75 V |
| Package Options | 10‑lead LFCSP (3 mm × 3 mm × 0.8 mm) or 10‑lead MSOP (3 mm × 4.9 mm × 1.1 mm) |
| Non‑volatile Memory | 50‑times programmable (50‑TP) wiper memory |
It can operate from a single‑supply of 2.7 V to 5.5 V or from dual supplies of ±2.5 V to ±2.75 V.
The device provides 1024 discrete positions for the digital rheostat.
The temperature coefficient is specified as 35 ppm/°C.