AD7298 is a 12-bit high-speed low-power, 8-channel successive approximation ADC with an internal temperature sensor. The device operates from a single 3.3 V power supply and features throughput rates up to 1 MSPS. The device contains a low noise, wide bandwidth track-and-hold amplifier that can handle inp up to 1Vpp. AD7298 also has a 12-bit temperature-to-digital converter with an accuracy of ±1°C. AD7298 uses SPI interface which is convenient to connect with MCU.
The AD7298 is a high‑speed, low‑power 8‑channel 12‑bit successive‑approximation ADC that operates from a single 3.3 V supply and provides up to 1 MSPS throughput. It includes an on‑chip 2.5 V reference and a high‑accuracy band‑gap temperature sensor with 0.25 °C resolution.
The document contains a full specification table, timing diagrams, pin‑out descriptions, typical performance graphs, and guidelines for PCB layout, power‑supply bypassing, and grounding. It also covers serial SPI interface timing, temperature‑sensor operation, and power‑down modes.
| Resolution | 12‑bit |
|---|---|
| Number of analog inputs | 8 single‑ended |
| Maximum sampling rate | 1 MSPS |
| Analog input voltage range | 0 V to 2.5 V |
| Temperature sensor accuracy | ±1 °C |
| Temperature sensor resolution | 0.25 °C |
| Operating temperature range | −40 °C to +125 °C |
| Supply voltage (VDD) | 2.8 V to 3.6 V |
| Logic voltage (VDRIVE) | 1.65 V to 3.6 V |
| Power‑down current | <10 µA |
| Internal reference voltage | 2.5 V |
The AD7298 can sample at up to 1 MSPS.
It provides eight single‑ended analog input channels.
The temperature sensor has a resolution of 0.25 °C.
The AD7298 operates from –40 °C to +125 °C.