ADS1255IDBT

Product Summary

The ADS1255IDBT is a extremely low-noise, 24-bit analog-to-digital (A/D) converter. The ADS1255IDBT provides complete high-resolution measurement solutions for the most demanding applications. The converter is comprised of a 4th-order, delta-sigma (ΔΣ) modulator followed by a programmable digital filter. A flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. Communication is handled over an SPI-compatible serial interface that can operate with a 2-wire connection. Onboard calibration supports both self and system correction of offset and gain errors for all the PGA settings. Bidirectional digital I/Os and a programmable clock output driver are provided for general use. The ADS1255IDBT is packaged in an SSOP-20, and the ADS1256 in an SSOP-28.

Parametrics

ADS1255IDBT absolute maximum ratings: (1)AVDD to AGND: -0.3 to +6 V; (2)DVDD to DGND: -0.3 to +3.6 V; (3)AGND to DGND: -0.3 to +0.3 V; (4)Input Current: 100, Momentary mA; 10, Continuous mA; (5)Analog inputs to AGND: -0.3 to AVDD +0.3 V; (6)Digital inputs, DIN, SCLK, CS, RESET, SYNC/PDWN, XTAL1/CLKIN to DGND: -0.3 to +6 V; (7)D0/CLKOUT, D1, D2, D3 to DGND: -0.3 to DVDD +0.3 V; (8)Maximum Junction Temperature: +150℃; (9)Operating Temperature Range: -40 to +105℃; (10)Storage Temperature Range: -60 to +150℃; (11)Lead Temperature (soldering, 10s): +300℃.

Features

ADS1255IDBT features: (1)24 Bits, No Missing Codes; (2). All Data Rates and PGA Settings; (3)Up to 23 Bits Noise-Free Resolution; (4)±0.0010% Nonlinearity (max); (5)Data Output Rates to 30kSPS; (6)Fast Channel Cycling, 18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHz; (7)One-Shot Conversions with Single-Cycle Settling; (8)Flexible Input Multiplexer with Sensor Detect, Four Differential Inputs; (9)Chopper-Stabilized Input Buffer; (10)Low-Noise PGA: 27nV Input-Referred Noise; (11)Self and System Calibration for All PGA Settings; (12)5V Tolerant SPI.-Compatible Serial Interface; (13)Analog Supply: 5V; (14)Digital Supply: 1.8V to 3.6V; (15)Power Dissipation, As Low as 38mW in Normal Mode; 0.4mW in Standby Mode.

Diagrams