The AD7678 is a high performance, low power, low cost, 18-bit, 100 kSPS SAR ADC featuring low errors, high dynamic range, low noise and high accuracy.
The AD7678 is an 18‑bit, charge‑redistribution SAR analog‑to‑digital converter that operates from a single 5 V supply. It offers 100 kSPS throughput, low power consumption, and a dynamic range of 103 dB, making it suitable for high‑speed data‑acquisition applications such as CT scanners, medical instruments, and spectrum analysis.
This datasheet provides complete electrical specifications, absolute maximum ratings, pin‑out descriptions, and detailed timing diagrams for both parallel and serial interfaces. It also includes application hints, performance graphs, and ordering information for the 48‑lead LQFP and LFCSP packages.
| Resolution | 18 bits |
|---|---|
| Throughput | 100 kSPS |
| Power Dissipation (100 kSPS) | 18 mW |
| Dynamic Range | 103 dB typ |
| Integral Nonlinearity (INL) | +2.5 LSB max |
| Supply Voltage (AVDD) | 4.75 V – 5.25 V |
| Package Options | 48‑lead LQFP or 48‑lead LFCSP |
The AD7678 provides 18‑bit resolution with no missing codes.
The device can sample at up to 100 kSPS.
Power dissipation is 18 mW when operating at 100 kSPS.
It is offered in 48‑lead LQFP or 48‑lead LFCSP packages.