ADS9817 Series

Eight-channel, 18-bit, 2-MSPS/ch dual simultaneous-sampling ADC with integrated analog front end

Catalog

Eight-channel, 18-bit, 2-MSPS/ch dual simultaneous-sampling ADC with integrated analog front end

Part	Architecture	Ratio - S/H:ADC	Reference Type	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Supplier Device Package	Input Type	Features	Data Interface	Configuration	Number of Inputs	Package / Case	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Sampling Rate (Per Second)	Number of A/D Converters	Power (Typ) @ Conditions	Supplied Contents	Input Range [Min]	Input Range [Max]	Utilized IC / Part
Texas Instruments ADS9817RSHR	SAR	0:8	External Internal	1.15 V	1.85 V	1.75 V 4.75 V	1.85 V 5.25 V	56-VQFN (7x7)	Differential Single Ended	Over-Voltage Protection PGA	Serial SPI	MUX-PGA-ADC	16 8	56-VFQFN Exposed Pad	Surface Mount	125 °C	-40 °C	2M	8
Texas Instruments ADS9817EVM											CMOS Serial							2M	2	232 mW	Board(s)	-12 V	12 V	ADS9817
Texas Instruments ADS9817RSHT	SAR	0:8	External Internal	1.15 V	1.85 V	1.75 V 4.75 V	1.85 V 5.25 V	56-VQFN (7x7)	Differential Single Ended	Over-Voltage Protection PGA	Serial SPI	MUX-PGA-ADC	16 8	56-VFQFN Exposed Pad	Surface Mount	125 °C	-40 °C	2M	8

Catalog

Eight-channel, 18-bit, 2-MSPS/ch dual simultaneous-sampling ADC with integrated analog front end

Key Features

• 8-channel, 18-bit ADC with analog front-end:Dual, simultaneous sampling: 4 × 1 channelsConstant 1MΩ input impedance front-endProgrammable analog input ranges:±12V, ±10V, ±7V, ±5V, ±3.5V, and ±2.5VSingle-ended and differential inputs±12V common-mode voltage rangeInput overvoltage protection: Up to ±18VUser-selectable analog input bandwidth:21kHz and 400kHzIntegrated low-drift precision referencesADC reference: 4.096V2.5V reference output for external circuitsExcellent AC and DC performance at full-throughput:DNL: ±0.5LSB, INL: ±0.8LSBSNR: 92dB, THD: –113dBPower supply:Analog and digital: 5V and 1.8VDigital interface: 1.2V to 1.8VTemperature range: –40°C to +125°C8-channel, 18-bit ADC with analog front-end:Dual, simultaneous sampling: 4 × 1 channelsConstant 1MΩ input impedance front-endProgrammable analog input ranges:±12V, ±10V, ±7V, ±5V, ±3.5V, and ±2.5VSingle-ended and differential inputs±12V common-mode voltage rangeInput overvoltage protection: Up to ±18VUser-selectable analog input bandwidth:21kHz and 400kHzIntegrated low-drift precision referencesADC reference: 4.096V2.5V reference output for external circuitsExcellent AC and DC performance at full-throughput:DNL: ±0.5LSB, INL: ±0.8LSBSNR: 92dB, THD: –113dBPower supply:Analog and digital: 5V and 1.8VDigital interface: 1.2V to 1.8VTemperature range: –40°C to +125°C

Description

The ADS981x is an 8-channel data acquisition (DAQ) system based on a dual, simultaneous-sampling, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC). The ADS981x features a complete analog front-end for each channel with an input clamp protection circuit, 1MΩ input impedance, and a programmable gain amplifier (PGA) with user-selectable bandwidth options. The high input impedance allows direct connection with sensors and transformers, thus eliminating the need for external driver circuits. The ADS981x can be configured to accept unipolar or bipolar inputs with up to a ±12V common-mode voltage. The device also features a 4.096V reference for the ADC and a 2.5V reference output for use with external circuits. A digital interface supporting 1.2V to 1.8V operation enables the ADS981x to be used without external voltage level translators. The ADS981x is an 8-channel data acquisition (DAQ) system based on a dual, simultaneous-sampling, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC). The ADS981x features a complete analog front-end for each channel with an input clamp protection circuit, 1MΩ input impedance, and a programmable gain amplifier (PGA) with user-selectable bandwidth options. The high input impedance allows direct connection with sensors and transformers, thus eliminating the need for external driver circuits. The ADS981x can be configured to accept unipolar or bipolar inputs with up to a ±12V common-mode voltage. The device also features a 4.096V reference for the ADC and a 2.5V reference output for use with external circuits. A digital interface supporting 1.2V to 1.8V operation enables the ADS981x to be used without external voltage level translators.