The document describes a dual, 500kHz, 12-bit, 2 + 2 channel, simultaneous sampling analog-to-digital converter. The product features fully differential inputs, 2µs total throughput per channel, 1MHz effective sampling rate, etc. It is suitable for motor control, multi-axis positioning systems, and 3-phase power control applications.
The ADS7861 is a dual, 12‑bit, 500 kHz analog‑to‑digital converter with four fully differential input channels grouped into two pairs. It offers high‑speed simultaneous sampling, low power consumption (40 mW), and an SSI serial interface.
The datasheet details electrical characteristics, pin configurations, typical performance graphs, and application notes such as motor control and multi‑axis positioning. It also includes absolute maximum ratings, recommended handling procedures, and an important notice regarding product availability and warranty.
| Resolution | 12 bits |
|---|---|
| Maximum Sampling Rate | 500 kHz |
| Number of Input Channels | 4 fully differential (2+2) |
| Power Dissipation (Low Power) | 40 mW |
| Common‑Mode Rejection Ratio | 80 dB |
| Input Capacitance | 15 pF |
The ADS7861 can sample at up to 500 kHz.
It provides four fully differential input channels arranged as two pairs (2 + 2).
The device operates with low power consumption of about 40 mW.
The ADC achieves a common‑mode rejection ratio of 80 dB at DC.