Product category: Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: THS450x
Edited by the Electronicstalk Editorial Team on 1 May 2002
Low-distortion amps boost ADC performance
Texas Instruments has developed a new family of ultra-low-distortion amplifiers designed for driving the highest performance ADCs in the market today
The family features fully differential amplifiers equipped with the industry's lowest distortion, surpassing competitive devices by 10 to 20dB across the entire frequency spectrum. The new amplifiers will enable higher ADC resolution at faster sampling speeds in wireless basestation receivers, high-end test equipment, medical imaging and industrial sensing applications.
This article was originally published on Electronicstalk on 1 May 2002 at 8.00am (UK)
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The new THS4502 amplifier, the flagship product in the family, provides fully differential signalling with ultra-low distortion for support of 12 and 14bit ADCs operating at sampling rates of 80Msample/s and beyond.
The device features distortion ratings significantly better than those of competing devices, including a third-order intermodulation distortion of -95dBc, and a third-order output intercept point of 50dBm at 30MHz.
These distortion ratings enable the device to provide up to three additional bits of resolution at the same operating frequency relative to the competition, yielding exceptional signal resolution for high-performance applications.
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The THS4502 amplifier offers flexibility and performance headroom for use in a wide variety of designs.
Key signalling features include a unity gain bandwidth of 360MHz and a slew rate of 2800V/us.
Dual input supply voltages of -5 and +5V provide differential outputs with a current of 100mA.
The THS4502 offers a power-down feature, while an alternative device, the THS4503, is identical but without power down.
Two other new devices in the same family provide similar performance and low distortion using a single supply.
All devices in the family can shift signalling levels to a new common mode voltage when necessary.
In addition, the THS4500, with power down, and the THS4501, without power down, can accommodate 0V, ground-referenced input signal voltages when powered by a single 5V power supply.
All of the devices are based on BICOM II technology, the second generation of TI's innovative and highly successful BICOM manufacturing process.
'The new THS4500 family of high-performance amplifiers shows TI's dedication to providing solutions for driving high-speed ADCs', said Paul Nossaman, strategic marketing manager for High-Speed Amplifiers.
'These new devices will enable designers to get the highest resolution outputs from the highest-performance ADCs in the market'.
The THS4500, THS4501, THS4502 and THS4503 high-speed fully differential amplifiers are available now in volume from TI and its authorised distributors.
The devices are packaged in either 8-pin small outline integrated circuit (SOIC) or 8-pin micro small outline package (MSOP) packages.
Suggested resale pricing is $3.77 each in quantities of 1000.
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