Product category:
Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: DAC290x family
Edited by the Electronicstalk Editorial
Team on 28 August 2001
Speedy dual DACs have the edge for
wireless
Texas Instruments has a new family of 125Msample/s dual D/A convertors providing 10, 12 and 14bit resolution in pin-compatible packages.
Texas Instruments has a new family of 125Msample/s dual D/A convertors providing 10, 12 and 14bit resolution in pin-compatible packages which it claims feature exceptional dynamic performance for wireless communications The high performance and low price of the DAC290x family make it attractive for any communications system using quadrature modulation such as cellular and paging basestations, point-to-point microwave systems, wireless local loop, wireless LANs, and cable modems
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Additionally, the wide supply range (single +3.3V and/or +5V) and low power (310mW power dissipation) make the DAC290x family suitable for test instrumentation and battery-powered applications.
The DAC290x family consists of the DAC2904 (dual 14bit), DAC2902 (dual 12bit), and DAC2900 (dual 10bit).
All devices in the family are pin-compatible allowing an easy resolution upgrade path with the same board design.
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Furthermore, the standard pin-configuration followed by the DAC290x family gives customers a higher dynamic performance, lower power and lower price alternative to pin-compatible competitive devices, and simplifies the in-system evaluation and qualification process.
Designed for use in the transmit section of communications systems, the dual channels offered by the DAC290x are ideal for quadrature-modulated signal conversion by providing simultaneous processing and excellent I/Q channel matching.
This is critical for maintaining low error-vector magnitudes in systems deploying QAM (quadrature amplitude modulation) or other advanced multilevel modulation schemes.
"Transmit architectures using some form of analogue quadrature modulation represent a proven system solution.
With the DAC290x family, designers can upgrade their systems for wider bandwidth and higher data rate applications, such as EDGE, while avoiding the high cost of complete redesigns", said Stephan Baier, strategic marketing engineer of TI's high-speed data convertor products.
"The unmatched price/performance ratio of our new DAC290x family offers the perfect solution for any designer going through a cost reduction cycle without having to sacrifice performance.
For example, narrowband spurious-free dynamic range on the DAC2904 is well above the 80dB mark, while wideband ACPR performance is at an impressive -69dB level".
The DAC2904 and DAC2902 offer 81dB spurious-free dynamic range (SFDR) at 5MHz output frequency and 52Msample/s update rate.
The DAC2900 offers 80dB SFDR at 5MHz output frequency and 52Msample/s update rate.
The differential current outputs support a high compliance range of up to +1.25V while maintaining low distortion.
Each device features a power-down mode (23mW) allowing for significant power reduction while in standby mode.
Other features of the DAC290x family include differential current outputs, an adjustable 2-20mA full-scale output range, and an internal +1.25V reference.
All three devices in the DAC290x family are available now and are packaged in TQFP-48 packages.
Suggested resale pricing for 1000 piece quantities is: DAC2904 ($19.95), DAC2902 ($15.25) and DAC2900 ($9.10).
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