SAR ADCs ideal for motor control and data acquisition applications

10-04-2019 | Analog Devices | Power

Analog Devices' pin-compatible 16-bit AD7380 and 14-bit AD7381 ADCs offer throughput rates of 4MSPS and a tiny 3mm x 3mm LFCSP package. The dual simultaneous-sampling, high-speed ADCs are perfect for motor control, power quality, sonar, and data acquisition applications.

The devices comprise two SAR ADCs and a serial interface with two separate data output pins. Engineers are able to access data on the devices via the serial interface, which can work with one or two serial outputs. The ADCs offer fully differential analog inputs that allow a wide common-mode input voltage, sampling and converting on the falling edge of CS. The conversion process and data acquisition use standard control inputs enabling simple interfacing to microprocessors or DSPs. Integrated on-chip oversampling blocks enhance dynamic range and decrease noise at lower bandwidths.

The ADCs operate from a 3V to 3.6V power supply, with a buffered internal 2.5V reference (optional external reference up to 3.3V) and typical drift of just ┬▒1 ppm/C. The devices are supported by the EVAL-AD7380FMCZ and EVAL-AD7381FMCZ evaluation boards, respectively, together with the EVAL-SDP-CH1Z high-speed controller board.

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