The AD7715 is a 16-bit Sigma-Delta ADC from Analog Devices that consumes less than 450µA of supply current at 3V and has a conversion speed of 1µs. The AD7715 is manufactured using CMOS technology and has very low power consumption, with a standby power consumption of only 50µW at 3V. The AD7715 provides four gain selections of 1, 2, 32, and 128 and supports a three-wire serial interface that is compatible with SPI™, QSPI™, MICROWIRE™, and DSP.
The AD7715 is a 16‑bit sigma‑delta analog‑to‑digital converter designed for low‑frequency measurement applications. It features a programmable gain front end (gains of 1, 2, 32, 128), differential input capability, and a three‑wire serial interface compatible with SPI, QSPI, Microwire, and DSP.
The device operates from a single 3 V or 5 V supply, consumes less than 450 µA at 3 V, and has a standby current below 10 pA. It offers a variety of unipolar and bipolar input ranges, on‑chip calibration, and low‑power standby modes, making it suitable for microcontroller or DSP‑based systems.
| Resolution | 16‑Bit |
|---|---|
| Supply Current (3 V) | 450 µA max |
| Standby Current | <10 pA |
| Programmable Gain Options | 1, 2, 32, 128 |
| Power Dissipation (max) | 450 mW |
The AD7715 draws up to 450 µA from a 3 V supply.
It supports SPI, QSPI, Microwire and DSP‑compatible three‑wire serial interfaces.
Four gain settings are available: 1, 2, 32 and 128.
In standby mode the device consumes less than 10 pA.