Analog-to-Digital Converter optimizes receiver performance.

Press Release Summary:





With spurious free dynamic range of 100 dBc combined with 78 dB SNR, 16-bit Model LTC2208 resolves low-level signals in presence of large interferers and blockers. Offered in speed grades up to 130 Msps, unit includes internal transparent dither circuit, which optimizes SFDR response, and digital output randomizer that minimizes unwanted tones caused by digital feedback. Unit is housed in 9 x 9 mm QFN package and consumes 1,250 mW without need for heatsinking.




Original Press Release:




16-bit, 130Msps ADC Delivers 100dBc SFDR for High Performance Receivers & Instrumentation



Fastest 16-Bit ADC Enables Leading Edge Development for Applications Demanding the Highest Dynamic Range Specifications

MILPITAS, CA - September 6, 2005 - A new 16-bit, 130Msps ADC (Analog-to-Digital Converter) by Linear Technology Corporation extends the company's leadership in high speed (ADCs) for the most demanding wideband, low noise, signal acquisition applications. The LTC2208 ADC addresses the key requirements for maximizing performance of high sensitivity receivers and data acquisition systems. The device's exceptional spurious free dynamic range (SFDR) performance of 100dBc, combined with 78dB signal to noise ratio (SNR), enable it to resolve low level signals in the presence of large interferers and blockers. The LTC2208 is the fastest 16-bit, high performance ADC on the market today.

The LTC2208 family innovates ADC technology for digital receivers by incorporating two unique features that simplify receiver design and improve system performance. The first is an internal transparent dither circuit that improves the ADC's spurious free dynamic range (SFDR) response well beyond 100dBc for low level input signals. The second feature is a digital output randomizer that dramatically reduces unwanted tones caused by digital feedback. The flexible digital outputs can be run as CMOS or LVDS.

The LT2208 also features a programmable gain amplifier (PGA) front end that eases the ADC driver output power requirements when driving the lower input range of 1.5 Vp-p. This improves the distortion performance and power consumption of the driver with minimal impact on ADC noise performance.

The LTC2208 packages an extensive feature set in a 9mm x 9mm QFN package delivering low power consumption at 1250mW without the need for heat sinking. Most importantly, both the power consumption and total solution size with integrated bypass capacitance are less than half that of the nearest competitor. Designed for ease of use, it requires only a single 3.3V supply for operation and comes with a clock duty cycle stabilizer for maintaining the ADC performance over varying duty cycles. The LTC2208 can accept high frequency, wide dynamic range signals, offering a wide analog input bandwidth of 700MHz.

The LTC2208 family includes speed grades of 130Msps, 105Msps, 80Msps, 65Msps, 40Msps, 25Msps and 10Msps all with superior SFDR and SNR performance. In addition to the 16-bit parts, 14-bit versions of this family will also be available. All devices are supported with demo boards for quick device evaluation. Samples and demo boards for the LTC2208 are available today, and production quantities in October for both commercial and industrial temperature grades and are competitively priced at $65 each in 1,000-piece quantities.

All parts can be ordered in optional lead free packages for RoHS compliance.

Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.

LT and LTC are registered trademarks of Linear Technology Corp.

North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com

Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com

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