High-performance Burr-Brown ADS1255 and ADS1256 analog-to-digital converters (ADCs) for industrial applications boast a best-in-class combination of noise-free resolution, data rate, and functionality.
The 24-bit delta-sigma ADCs provide designers with high-resolution measurement solutions for demanding industrial applications including scientific instrumentation, process control, medical equipment, and weighing scales.
The ADS1255 and ADS1256 offer noise-free resolution up to 23 bits, data rates up to 30 k samples per second, ۪.001 percent non-linearity (max), and a host of onboard peripherals (input multiplexer, input buffer, and programmable gain amplifier).
Both converters are comprised of a fourth-order delta-sigma modulator followed by a programmable digital filter. The flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. The input also includes a chopper-stabilized buffer engineered to provide very high input impedance and a low-noise programmable gain amplifier with gains of 1 to 64. The programmable filter allows the user to optimize between resolution and data rate. When measuring multiplexed inputs, these devices are designed to cycle quickly between channels without data loss. One-shot conversions can be performed to achieve power savings with a low-power standby mode.
The ADS1255 supports one differential or two single-ended inputs and has two general-purpose digital I/Os. The ADS1256 supports four differential or eight single-ended inputs and has four general-purpose digital I/Os. Communication is handled over an SPI-compatible serial interface.
The ADS1255 is packaged in an SSOP-20 with pricing starting at $7.95. The ADS1256 comes in an SSOP-28 with pricing starting at $8.95.
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