Imec and Renesas Electronics claim record ADC for next-generation high-bandwidth wireless receivers
February 23, 2012 // Paul Buckley
At International Solid-State Circuit Conference (ISSCC2012) imec and Renesas Electronics Corporation are reporting an innovative SAR ADC with a marked improvement in power efficiency and speed, targeting wireless receivers for next-generation high-bandwidth standards such as LTE-advanced and the emerging generation of Wi-Fi (IEEE802.11ac). The world-first 11bit 250 MSamples/s SAR ADC achieves a record low-power consumption of 1.7 mWatt.
The new SAR ADC architecture, developed by imec and Renesas Electronics, is an answer to the need for much faster low-power ADCs with small form factor. The reported ADC is an ultra-low power (1.7 mWatt) high resolution (11b) fully-dynamic, two-step interleaved pipelined SAR ADC achieving a record power efficiency of 10fJoule per conversion step at a sampling speed as high as 250MSamples/s. This is a spectacular increase of the speed and sampling frequency, which are both an order of magnitude better than state-of-the art available ADC IP blocks.
The result is obtained with a new converter architecture based on prior groundbreaking ADC designs from imec, exploiting the opportunities of modern advanced CMOS technologies. The design uses completely dynamic circuits, such that the power consumption scales linearly with the sampling frequency, and is implemented with a maximum amount of digital content, leaving the comparator as the only analog building block.
The ADC prototype has been manufactured in 40 nm CMOS with a core chip area of 0.066 mm2. Measurements show a DNL and INL of respectively 0.8/-0.5 and 1.1/-1.5 LSB. The dynamic performance is characterized by 62 dB SNDR (10.0 ENOB) at 10 MSamples/s, which is maintained up to 9.5 ENOB level for a sampling speed of up to 250 MSamples/s. The power consumption is 6.9pJoule per conversion (70 Watt at 10 MSamples/s, 1.7 mWatt at 250 MSamples/s), resulting in a spectacular energy efficiency of 7 to 10fJoule per conversion-step.All news
ADCs for high dynamic range – successive-approximation or sigma-delta?
September 01, 2014
Maithil Pachchigar, an applications engineer with Analog Devices Inc., looks at trade-offs that must be considered when choosing ...
Microchip in Pursuit of CSR
Samsung Funds III-V FinFETs in US Lab
A question of Europe
Trinamic's stepper motor package gets you started
Winged parcel delivery: Google's way
August 29, 2014
While there is still debate about if legislation would ever allow swarms of commercial drones to fly over our heads, Google ...
Two-inch Super AMOLED display fits Samsung smartwatch plans
UK armed forces consider lithium sulfur batteries
Small cell market to hit $4.8 billion in five years
- Power Modules: The New Super Power
- Digital Power Management Reduces Energy Costs While Improving System Performance
- Using RF Recording Techniques to Resolve Interference Problems
- How to Protect & Monetize Android Apps
InterviewA question of Europe
Sir Peter Bonfield sits on the board and has advisory roles in many international companies and universities. With more than 45 years of experience in electronics, computers and communications, here he ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Trinamic Motion Control is offering you to win one of four TMCM-1043 development kits for its highly integrated, NEMA 17-compatible TMCM-1043 stepDancer stepper motor module.
Offering designers an easy-to-use PC-based GUI that allows one-click modification of motor drive current, micro-stepping and other key parameters, the intuitive kits are custom designed and developed for...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.