Texas Instruments has released two multichannel, 16-bit, delta-sigma analog-to-digital converters (ADCs), which combine high DC accuracy and AC performance with cost-effective integration. The ADS1174 (4-channel) and ADS1178 (8-channel) provide a simultaneous-sampling measurement system for demanding signal acquisition applications, such as power metering, defibrillators and ECG monitors, as well as pressure sensors, coriolis flow meters and vibration/modal analysis.
Both devices feature 25 kHz bandwidth, 2 μV/°C offset drift and up to 97 dB signal-to-noise ratio (SNR). Two operating modes allow for optimisation of speed (52 Ksps) or power dissipation (7 mW/channel).
Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop, resulting in limited signal bandwidth and being mostly suited for DC measurements. High-resolution ADCs for audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly worse (and often unspecified) than their industrial counterparts.
The ADS1174 and ADS1178 combine these two types of converters, allowing high-precision industrial measurements with excellent DC and AC specifications. The high-order, chopper-stabilised modulator achieves low drift and low noise over the signal bandwidth of DC up to the Nyquist frequency. The onboard decimation filter suppresses modulator and out-of-band noise, providing a usable signal bandwidth up to 90% of the Nyquist rate with stopband attenuation of 100 dB.
A selectable SPI or frame sync serial interface allows for convenient interfacing to DSPs, FPGAs and microcontrollers. Either interface supports daisy chaining to simplify readback of multiple ADCs in high channel-count systems. The ADCs are fully specified over the industrial temperature range of -40°C to +105°C.
General-purpose evaluation board Altron Arrow
DSP, Micros & Memory
Based on the 32-bit Arm Cortex-M7 S32K3 MCU in a 172 HDQFP package, the S32K3X4EVB-T172 offers dual cores configured in lockstep mode, ASIL D safety hardware, and HSE security engine.
Read more...Zero drift current shunt monitors Altron Arrow
Power Electronics / Power Management
The NCS21671 and NCV21671 from onsemi are a series of voltage output current sense amplifiers offered in gains of 25, 50, 100, and 200 V/V.
Read more...Wi-Fi 6/BLE module enables rapid development Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Telit Cinterion has announced the WE310K6, a fully integrated, low-power module featuring dual-band, dual-stream Wi-Fi 6, and dual-mode Bluetooth/BLE.
Read more...Analysis of switch-mode power supply: inductor violations Altron Arrow
Editor's Choice Power Electronics / Power Management
Common switch-mode power supply (SMPS) design errors are discussed, and their appropriate rectification is specified, with details on complications that arise with the power stage design of DC-DC switching regulators.
Read more...Microsoft Windows IoT on ARM Altron Arrow
Computer/Embedded Technology
This expansion means that the Windows IoT ecosystem can now harness the power of ARM processors, known for their energy efficiency and versatility.
Read more...Microchip introduces ECC608 TrustMANAGER Altron Arrow
Circuit & System Protection
To increase security on IoT products and facilitate easier setup and management, Microchip Technology has added the ECC608 TrustMANAGER with Kudelski IoT keySTREAM, Software as a Service (SaaS) to its Trust Platform portfolio of devices, services and tools.
Read more...SolidRun unveils new SoM Altron Arrow
AI & ML
SolidRun and Hailo has unveiled a game-changer for engineers and AI product developers with the launch of their market-ready SoM, which packs the cutting-edge capabilities of the Hailo-15H SoC.
Read more...An evolutionary step in customisable logic Altron Arrow
DSP, Micros & Memory
Microchip Technology is offering a tailored hardware solution with the launch of its PIC16F13145 family of microcontrollers, which are outfitted with a new Configurable Logic Block module.
printer friendly version