ADS8557IPM

The ADS8557IPM is a 14-bit, 670 kSPS (parallel) or 470 kSPS (serial) simultaneous-sampling SAR analog-to-digital converter from Texas Instruments. It features six single-ended input channels grouped in three pairs, each with its own sample-and-hold amplifier, enabling simultaneous sampling of up to three differential pairs or six single-ended signals. The device offers a pin-selectable or programmable input voltage range up to ±12 V, and includes a programmable and buffered internal reference (0.5 V to 2.5 V or 0.5 V to 3.0 V).

Key specifications include a typical signal-to-noise ratio of 85 dB, power consumption of 335 mW, and support for both internal and external conversion clocks and references. The ADC interfaces via byte-wide parallel or SPI serial interface, and features daisy-chain capability for multiple devices. It also includes comprehensive power-down modes: deep power-down, partial power-down, and auto-nap.

The ADS8557IPM is part of the ADS855x family of pin- and software-compatible 16-, 14-, and 12-bit ADCs, allowing easy scalability. It is housed in a 64-pin LQFP package (10x10 mm) with surface mount mounting, and operates over the industrial temperature range of -40°C to 125°C. Typical applications include industrial automation, motor control, power monitoring, and data acquisition systems requiring high-speed simultaneous sampling.