The EL5225 is a 10-channel TFT-LCD reference voltage generator from Intersil that can operate over the full -40°C to +85°C temperature range. The device has 10 outputs with a resolution of 10 bits and is programmed using a 3-wire SPI compatible interface. The EL5225 can be stacked to meet applications requiring more than 10 outputs. The reference inputs can be tied to the rails, enabling each part to output the full voltage range, or alternatively, they can be connected to external resistors to split the output range and enable finer resolutions of the outputs.
The EL5225 provides ten programmable reference‑voltage outputs for TFT‑LCD drive circuits. Each channel can be set with 10‑bit resolution and can swing to within 50 mV of the supply rails, offering +1 % accuracy and rail‑to‑rail capability. The device can be stacked to expand the number of available channels.
Programming is performed via a three‑wire, SPI‑compatible serial interface that supports clock rates up to 5 MHz. The chip includes an internal 21 kHz oscillator or can use an external clock, and features built‑in protection against electrostatic discharge. Electrical specifications include a supply range of 4.5 V–18 V, digital supply of 3.3 V–5 V, and a low supply current of 9 mA.
| Number of channels | 10 |
|---|---|
| Resolution per channel | 10 bits |
| Supply voltage range (Vg‑GND) | 4.5 V min to 18 V max |
| Digital supply voltage | 3.3 V to 5 V |
| Low supply current | 9 mA |
| Accuracy | +1 % |
| Rail‑to‑rail capability | Yes |
| Input resistance (RINH) | 32 kΩ |
The EL5225 is programmed through a three‑wire, SPI‑compatible serial interface.
It provides ten independent reference‑voltage channels.
Each output can be programmed with 10‑bit resolution.