Product category:
Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: DAC5675
Edited by the Electronicstalk Editorial
Team on 13 December 2001
DAC aims for multicarrier basestations
Claiming the industry's highest performance for high-datarate digital communications applications, Texas Instruments has a new high-speed high-resolution LVDS-compatible DAC.
Claiming the industry's highest performance for high-datarate digital communications applications, Texas Instruments has a new high-speed high-resolution LVDS-compatible DAC The new 14bit resolution DAC5675 enables transmission of 3G multicarrier wideband CDMA (WCDMA) and supports additional major wireless standards such as CDMA2000, IS-95, GSM, GPRS, EDGE and IS-136, as well as other digital applications based on QAM and QPSK modulation techniques
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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TI's DAC5675 maintains excellent dynamic performance at high output frequencies at up to 400Msample/s of data throughput.
The high speeds enable direct digital intermediate frequency (IF) transmission at high intermediate frequencies, thus eliminating a mix-up stage from the signal chain and enabling the support of up to four WCDMA carriers in a single channel.
Moreover, the DAC5675 features a 68dB WCDMA adjacent channel power ratio (ACPR) at 150MHz IF.
For multicarrier narrowband applications, the DAC5675 provides a low intermodulation distortion (IMD3) of -82dBc at 100MHz IF.
The high dynamic range of the new DAC5675 allows developers of cellular base transceiver stations, broadband wireless access and point-to-point microwave equipment, cable modem head ends and high-end test equipment to reduce system cost by relaxing filter specifications and reducing component count.
The DAC5675 is the first DAC to offer a low-voltage differential signalling (LVDS) interface, typically an option in ASIC and FPGA libraries, capable of providing a high-datarate direct interface to onboard ASICs and FPGAs.
In addition, the LVDS interface of the DAC5675 lowers electromagnetic interference (EMI) in the system.
Support for system development includes an evaluation module (EVM) and documentation.
For interfacing to other types of logic, such as digital signal processors (DSPs), TI offers the SN65LVDS387 CMOS-to-LVDS translator.
Samples of TI's 14bit DAC5675 high-speed data convertor are available now, with volume production scheduled for January 2002.
The device is packaged in a 48-lead high-temperature quad flatpack (HTQFP) with PowerPad.
Planned pricing in quantities of 1000 is $34.50.
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