ADS1256 Series

24-Bit, 30kSPS, 8-Ch Delta-Sigma ADC With PGA for Factory Automation and Process Control

Catalog

24-Bit, 30kSPS, 8-Ch Delta-Sigma ADC With PGA for Factory Automation and Process Control

Part	Number of Inputs	Configuration	Sampling Rate (Per Second)	Reference Type	Mounting Type	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Features	Package / Case [custom]	Package / Case	Package / Case [custom]	Number of Bits	Data Interface	Voltage - Supply, Analog	Number of A/D Converters	Architecture	Input Type	Power (Typ) @ Conditions	Utilized IC / Part	Input Range [Max]	Input Range [Min]	Supplied Contents
Texas Instruments ADS1256IDBRG4	4 8	MUX-PGA-ADC	30k	External	Surface Mount	3.6 V	1.8 V	85 °C	-40 °C	28-SSOP	PGA	0.209 in	28-SSOP	5.3 mm	24	SPI	5 V	1	Sigma-Delta	Differential Single Ended
Texas Instruments ADS1256IDBT	4 8	MUX-PGA-ADC	30k	External	Surface Mount	3.6 V	1.8 V	85 °C	-40 °C	28-SSOP	PGA	0.209 in	28-SSOP	5.3 mm	24	SPI	5 V	1	Sigma-Delta	Differential Single Ended
Texas Instruments ADS1256EVM-PDK			30k												24	Serial		1			38 mW	ADS1256	5 V	0 V	Board(s)
Texas Instruments ADS1256IDBR	4 8	MUX-PGA-ADC	30k	External	Surface Mount	3.6 V	1.8 V	85 °C	-40 °C	28-SSOP	PGA	0.209 in	28-SSOP	5.3 mm	24	SPI	5 V	1	Sigma-Delta	Differential Single Ended
Texas Instruments ADS1256IDBTG4	4 8	MUX-PGA-ADC	30k	External	Surface Mount	3.6 V	1.8 V	85 °C	-40 °C	28-SSOP	PGA	0.209 in	28-SSOP	5.3 mm	24	SPI	5 V	1	Sigma-Delta	Differential Single Ended

Catalog

24-Bit, 30kSPS, 8-Ch Delta-Sigma ADC With PGA for Factory Automation and Process Control

Key Features

• 24 Bits, No Missing CodesAll Data Rates and PGA SettingsUp to 23 Bits Noise-Free Resolution±0.0010% Nonlinearity (max)Data Output Rates to 30kSPSFast Channel Cycling18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHzOne-Shot Conversions with Single-Cycle SettlingFlexible Input Multiplexer with Sensor DetectFour Differential Inputs (ADS1256 only)Eight Single-Ended Inputs (ADS1256 only)Chopper-Stabilized Input BufferLow-Noise PGA: 27nV Input-Referred NoiseSelf and System Calibration for All PGA Settings5V Tolerant SPI™-Compatible Serial InterfaceAnalog Supply: 5VDigital Supply: 1.8V to 3.6VPower DissipationAs Low as 38mW in Normal Mode0.4mW in Standby Mode24 Bits, No Missing CodesAll Data Rates and PGA SettingsUp to 23 Bits Noise-Free Resolution±0.0010% Nonlinearity (max)Data Output Rates to 30kSPSFast Channel Cycling18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHzOne-Shot Conversions with Single-Cycle SettlingFlexible Input Multiplexer with Sensor DetectFour Differential Inputs (ADS1256 only)Eight Single-Ended Inputs (ADS1256 only)Chopper-Stabilized Input BufferLow-Noise PGA: 27nV Input-Referred NoiseSelf and System Calibration for All PGA Settings5V Tolerant SPI™-Compatible Serial InterfaceAnalog Supply: 5VDigital Supply: 1.8V to 3.6VPower DissipationAs Low as 38mW in Normal Mode0.4mW in Standby Mode

Description

The ADS1255 and ADS1256 are extremely low-noise, 24-bit analog-to-digital (A/D) converters. They provide 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. The selectable input buffer greatly increases the input impedance and the low-noise programmable gain amplifier (PGA) provides gains from 1 to 64 in binary steps. The programmable filter allows the user to optimize between resolution of up to 23 bits noise-free and data rate of up to 30k samples per second (SPS). The converters offer fast channel cycling for measuring multiplexed inputs and can also perform one-shot conversions that settle in just a single cycle. 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 ADS1255 is packaged in an SSOP-20, and the ADS1256 in an SSOP-28. The ADS1255 and ADS1256 are extremely low-noise, 24-bit analog-to-digital (A/D) converters. They provide 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. The selectable input buffer greatly increases the input impedance and the low-noise programmable gain amplifier (PGA) provides gains from 1 to 64 in binary steps. The programmable filter allows the user to optimize between resolution of up to 23 bits noise-free and data rate of up to 30k samples per second (SPS). The converters offer fast channel cycling for measuring multiplexed inputs and can also perform one-shot conversions that settle in just a single cycle. 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 ADS1255 is packaged in an SSOP-20, and the ADS1256 in an SSOP-28.