ADS1218 Series

24-Bit, 780SPS ADC w/ Flash Memory, 8 Ch, VREF, Buffer, 2 IDACs, Serial Out, Digital I/O, Low Power

Catalog

24-Bit, 780SPS ADC w/ Flash Memory, 8 Ch, VREF, Buffer, 2 IDACs, Serial Out, Digital I/O, Low Power

Part	Supplier Device Package	Number of Inputs	Features	Reference Type	Number of Bits	Package / Case	Data Interface	Mounting Type	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Voltage - Supply, Analog	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Number of A/D Converters	Architecture	Operating Temperature [Max]	Operating Temperature [Min]	Sampling Rate (Per Second)	Configuration	Input Type	Supplied Contents	Utilized IC / Part	Sampling Rate (Per Second)
Texas Instruments ADS1218Y/250	48-TQFP (7x7)	8	PGA	External Internal	24	48-TQFP	SPI	Surface Mount	5.25 V	2.7 V	5 V	3.3 V	2.7 V	1	Sigma-Delta	85 °C	-40 °C	780 Per Second	MUX-PGA-ADC	Differential
Texas Instruments ADS1218EVM					24		SPI							1							Board(s)	ADS1218	1k

Catalog

24-Bit, 780SPS ADC w/ Flash Memory, 8 Ch, VREF, Buffer, 2 IDACs, Serial Out, Digital I/O, Low Power

Key Features

• 24 BITS NO MISSING CODES0.0015% INL22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25VPGA FROM 1 TO 128SINGLE CYCLE SETTLING MODEPROGRAMMABLE DATA OUTPUT RATES UP TO 1kHzPRECISION ON-CHIP 1.25V/2.5V REFERENCE:ACCURACY: 0.2%DRIFT: 5ppm/°CEXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5VON-CHIP CALIBRATIONPIN-COMPATIBLE WITH ADS1216SPI™ COMPATIBLE2.7V TO 5.25V< 1mW POWER CONSUMPTIONAPPLICATIONSINDUSTRIAL PROCESS CONTROLLIQUID/GAS CHROMATOGRAPHYBLOOD ANALYSISSMART TRANSMITTERSPORTABLE INSTRUMENTATIONWEIGHT SCALESPRESSURE TRANSDUCERSSPI is a trademark of Motorola.All trademarks are the property of their respective owners.24 BITS NO MISSING CODES0.0015% INL22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25VPGA FROM 1 TO 128SINGLE CYCLE SETTLING MODEPROGRAMMABLE DATA OUTPUT RATES UP TO 1kHzPRECISION ON-CHIP 1.25V/2.5V REFERENCE:ACCURACY: 0.2%DRIFT: 5ppm/°CEXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5VON-CHIP CALIBRATIONPIN-COMPATIBLE WITH ADS1216SPI™ COMPATIBLE2.7V TO 5.25V< 1mW POWER CONSUMPTIONAPPLICATIONSINDUSTRIAL PROCESS CONTROLLIQUID/GAS CHROMATOGRAPHYBLOOD ANALYSISSMART TRANSMITTERSPORTABLE INSTRUMENTATIONWEIGHT SCALESPRESSURE TRANSDUCERSSPI is a trademark of Motorola.All trademarks are the property of their respective owners.

Description

The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits. The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/A) converter provides an offset correction with a range of 50% of the FSR (Full-Scale Range). The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for ratiometric conversion. The on-board current DACs (Digital-to-Analog Converters) operate independently with the maximum current set by an external resistor. The serial interface is SPI-compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1218 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation. The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits. The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/A) converter provides an offset correction with a range of 50% of the FSR (Full-Scale Range). The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for ratiometric conversion. The on-board current DACs (Digital-to-Analog Converters) operate independently with the maximum current set by an external resistor. The serial interface is SPI-compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1218 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.