The AD7851 is a high speed, 14-bit ADC that operates from a single 5V supply. The ADC powers up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and has a number of power-down options for low power applications. The AD7851 is capable of a 333 kHz throughput rate. The input track-and-hold acquires a sample of the input signal and converts it to a digital value using a 4.096V reference voltage. The digital data is then transferred to an external device via the serial interface.
The AD7851 is a high‑speed, 14‑bit analog‑to‑digital converter that operates from a single 5 V supply. It offers up to 333 kSPS throughput (A‑grade) or 285 kSPS (K‑grade) and includes self‑calibration and system‑calibration features for accurate performance over temperature and time.
The device is available in 24‑lead PDIP, SOIC, and SSOP packages and provides flexible serial interfaces (8051, SPI, QSPI) with configurable timing. Detailed specifications, absolute maximum ratings, pinouts, and register maps are included for designers.
| Resolution | 14 bits |
|---|---|
| Throughput Rate (A‑grade) | 333 kSPS |
| Throughput Rate (K‑grade) | 285 kSPS |
| Supply Voltage | Single 5 V |
| Power Consumption (typical) | 60 mW |
| Input Voltage Range | 0 V to VDD (unipolar) or –VREF/2 to +VREF/2 (bipolar) |
| Package Options | 24‑lead PDIP, SOIC, SSOP |
| Absolute Maximum AVDD to AGND | –0.3 V to +7 V |
It operates from a single 5 V supply.
It supports two input ranges: 0 V to VREF (unipolar) and –VREF/2 to +VREF/2 (bipolar).