Pseudo-differential serial SAR ADC achieves 96.5-dB SNR
November 08, 2011 // Paul Buckley
Linear Technology has introduced the LTC2369-18, a serial 18-bit, 1.6 Msps pseudo-differential SAR analog-to-digital converter, which achieves 96.5 dB SNR and -120 dB THD while supporting a 0 V to 5 V unipolar input range. The pseudo-differential input simplifies the ADC driver requirement, enabling single-ended drive while benefiting from the reduction of unwanted signals common to both inputs.
The input reduces complexity and lowers the power requirements in the signal chain. Operating from a 2.5 V supply, the LTC2369-18 consumes 18 mW, with a low power shutdown mode that consumes 2.25 µW. When used in combination with the recommended single-ended ADC driver LT6202, the combined power dissipation is 53 mW, a 40% reduction from a fully differential drive circuit. The LTC2369-18 claims to be the industry’s highest performing 18-bit pseudo-differential SAR ADC, featuring a maximum INL of ±2.5 LSB with no missing codes and guaranteed specifications over the -40 to 125°C temperature range.
Complementing the LTC2369-18 is the pin- and software-compatible 16-bit, 2 Msps LTC2370-16. The LTC2370-16 achieves outstanding 94 dB SNR and ±0.85 LSB maximum INL. The LTC2369-18 and LTC2370-16 are the first in a family of 18-/16-bit high performance pseudo-differential SAR ADCs with speeds ranging from 250 ksps to 2 Msps. They offer a user-friendly SPI interface, explicit Busy and Chain pins, I/O voltages from 1.8 V to 5 V and an internal oscillator that simplifies digital timing and minimizes external component count. Their true no-latency operation enables accurate one-shot measurements even after lengthy idle periods with no minimum sample rate required.
The LTC2369-18 family of 18-/16-bit pseudo-differential SAR ADCs broadens the LTC2379-18 family of up to 102 dB SNR, fully differential SAR ADCs introduced earlier in 2011. Linear’s complete portfolio of high performance pseudo and fully differential 18-/16-bit SAR ADCs with high SNR, fast throughput and low power dissipation is ideal for high performance medical, industrial and automotive applications.
The LTC2369-18 and LTC2370-16 are available in small 16-lead MSOP and 4 mm x 3 mm DFN packages.
For further information: www.linear.com/product/LTC2369.
The automation obituaries
January 27, 2015
What will humans soon have in common with horses? Obsoletion in the work place, if a video on YouTube by CGP Grey is anything ...
TSVs to split more chips: re-integration is the focus
Analog, embedded drive TI upwards in 2014
Maxim exits consumer MEMS, touch sensors
Algorithm indicates the electricity consumption of individual appliances
Graphene enables electrical control light emitter energy flows
January 27, 2015
Scientists from Europe's Graphene Flagship have demonstrated active, in-situ electrical control of energy flow from erbium ...
ARM backs printed electronics startup
Infineon takes the lead in auto semiconductors
Harman continues shopping spree with two software takeovers
- Sensing Elements for Current Measurements
- Investigating Die attach Failure in IGBTs using Power Cycling Tests
- Power Semiconductor Failure Diagnosis using Thermal Characterization and Power Cycling
- Top 5 Trends in Product Development and Test Engineering
InterviewCEO interview: Bosch's IoT startup is all about the system
Thorsten Mueller, CEO of Bosch Connected Devices and Solutions GmbH (Reutlingen, Germany), has been guiding the latest startup subsidiary of Robert Bosch GmbH since 2013 when he started the initiative ...
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
To ensure you have a good start in 2015, Freescale is giving away five of its QorIQ TWR-LS1021A Tower system modules, worth USD269 each, for EETimes Europe's readers to win.
The module is the most feature-rich and high-performance Tower system offered by Freescale, enabling compatibility and interoperability with the growing list of Tower expansion modules, offering an easily accessible...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.