Product category:
Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD9254
Edited by the Electronicstalk Editorial
Team on 31 August 2006
Convertor saves power in basestations
ADC offers optimal performance with low power consumption in a small footprint, making it well suited for wireless infrastructure applications and handheld instrumentation.
Analog Devices is expanding its portfolio of devices targeted at wireless infrastructure applications with the AD9254 14bit, 150Msample/s ADC The device achieves 83dBc SFDR (spurious-free dynamic range) at 70MHz while consuming only 430mW - a 50% reduction in power consumption over competing solutions
This article was originally published on Electronicstalk on 14 Sep 2001 at 8.00am (UK)
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14bit A/D conversion at 105Msample/s
Analog Devices is claiming another industry breakthrough with the first 14bit ADC to run at 105Msample/s.
This combination of high SFDR, low power consumption and small packaging (7 x 7mm 48-lead LFCSP) makes the device well suited for a range of wireless infrastructure applications, including WiMAX and picocell basestation receivers, as well as ultrasound and handheld instrumentation equipment.
The low power consumption of the AD9254 simplifies the deployment of cellular receivers and saves design and electricity costs by eliminating the need for separate cooling devices.
WiMAX and instrumentation designers also benefit from improved performance without having to sacrifice battery life.
Furthermore, the 150Msample/s sample rate eases analogue filtering in the receiver path and enables a wider continuous bandwidth up to 75MHz, which is necessary to support the 20MHz bandwidth requirements of a WiMAX basestation receiver.
The high sample rate also allows designers to realise the benefits of the lower noise floor and simplified AGC loop.
The AD9254 achieves SFDR of 83dBc with a 70MHz input.
An important specification for wireless infrastructure applications, high SFDR expands the dynamic range of basestation receivers by capturing weak signals in the frequency band despite the presence of stronger signals.
In addition to achieving the highest SFDR in its class, the AD9254 provides SNR (signal-to-noise ratio) of 72.7dBFS at 70MHz input.
This enables high-quality conversion of third-generation wireless standards including CDMA2000, W-CDMA and TD-SCDMA, reducing power consumption by adhering to the lower voltage levels of each standard.
The AD9254's SHA (sample-and-hold amplifier) maintains excellent performance for input frequencies up to 200MHz.
The device is pin-compatible with the AD9246 and AD9233 ADCs and can be used with ADI's AD8352 driver IC.
The AD9254 is sampling now.
It is priced at $55 per unit in 1000-piece quantities and is packaged in a 7 x 7mm 48-lead LFCSP (lead-free chip scale package).
The device is specified over the industrial temperature range (-40 to +85C).
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