ADS8638 Series

12-Bit 8-Channel Bipolar SAR With Software-Selectable Input Ranges

Catalog

12-Bit 8-Channel Bipolar SAR With Software-Selectable Input Ranges

Part	Number of Inputs	Data Interface	Architecture	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Number of Bits	Configuration	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Features	Input Type	Supplier Device Package	Ratio - S/H:ADC	Number of A/D Converters	Reference Type	Sampling Rate (Per Second)	Package / Case	Mounting Type	Supplied Contents	Utilized IC / Part
Texas Instruments ADS8638SRGER	8	SPI	SAR	2.7 V	5.25 V	125 °C	-40 °C	12 bits	MUX-S/H-ADC	5.25 V	1.65 V	Temperature Sensor	Single Ended	24-VQFN (4x4)	1:1	1	External Internal	1 M	24-VFQFN Exposed Pad	Surface Mount
Texas Instruments ADS8638EVM-PDK		SPI						12 bits								1		1 M			Board(s)	ADS8638

Catalog

12-Bit 8-Channel Bipolar SAR With Software-Selectable Input Ranges

Key Features

• Selectable Input Range:±10V, ±5V, ±2.5V, 0V to 10V, or0V to 5VUp to ±12V with External ReferenceNo Latent Conversions Up to 1MSPSOutstanding Performance:12 Bits No Missing CodesINL: ±0.9LSBSNR: 71.8dBHighly Integrated:4- or 8-Channel Input MuxTemperature SensorInternal Voltage ReferenceAlarm Thresholds for Each ChannelLow Power:14.45mW at 1MSPS5.85mW at 0.1MSPSFlexible Power-Down ModeSPI™-Compatible Serial InterfaceExtended Temperature Range:–40°C to +125°CSmall Footprint: 4mm × 4mm QFN PackageSelectable Input Range:±10V, ±5V, ±2.5V, 0V to 10V, or0V to 5VUp to ±12V with External ReferenceNo Latent Conversions Up to 1MSPSOutstanding Performance:12 Bits No Missing CodesINL: ±0.9LSBSNR: 71.8dBHighly Integrated:4- or 8-Channel Input MuxTemperature SensorInternal Voltage ReferenceAlarm Thresholds for Each ChannelLow Power:14.45mW at 1MSPS5.85mW at 0.1MSPSFlexible Power-Down ModeSPI™-Compatible Serial InterfaceExtended Temperature Range:–40°C to +125°CSmall Footprint: 4mm × 4mm QFN Package

Description

The ADS8634 and ADS8638 (ADS8634/8) are 12-bit analog-to-digital converters (ADCs) capable of measuring inputs up to ±10V at 1MSPS. Using a successive approximation register (SAR) core, these ADCs provide a sample-and-hold front-end with no latency in conversions. The ADS8634 includes an input multiplexer (mux) for measuring up to four inputs. The ADS8638 can measure up to eight inputs. In addition to the input multiplexer, the ADS8634/8 feature an internal temperature sensor, voltage reference, and a digital comparator for setting alarm thresholds on each input; therefore, a minimal amount of external components are required. A simple SPI-compatible interface provides for communication and control. The digital supply operates from 5V all the way down to 1.8V for direct connection to a wide range of processors and controllers. Ideal for demanding industrial measurement applications, the ADS8634/8 are fully specified over the extended industrial temperature range of –40°C to +125°C and are available in a small form-factor QFN-24 package. The ADS8634 and ADS8638 (ADS8634/8) are 12-bit analog-to-digital converters (ADCs) capable of measuring inputs up to ±10V at 1MSPS. Using a successive approximation register (SAR) core, these ADCs provide a sample-and-hold front-end with no latency in conversions. The ADS8634 includes an input multiplexer (mux) for measuring up to four inputs. The ADS8638 can measure up to eight inputs. In addition to the input multiplexer, the ADS8634/8 feature an internal temperature sensor, voltage reference, and a digital comparator for setting alarm thresholds on each input; therefore, a minimal amount of external components are required. A simple SPI-compatible interface provides for communication and control. The digital supply operates from 5V all the way down to 1.8V for direct connection to a wide range of processors and controllers. Ideal for demanding industrial measurement applications, the ADS8634/8 are fully specified over the extended industrial temperature range of –40°C to +125°C and are available in a small form-factor QFN-24 package.