Op Amp sets benchmarks for power and noise

LT6230/1/2 and LT6233/4/5 offer rail-to-rail outputs and 3V operation

Milpitas, CA January 29, 2004 – Two new families of high-speed operational amplifiers from Linear Technology set new low power and low noise performance benchmarks. These devices consume only 50% as much power as competitive devices and deliver ultra low noise performance, rail-to-rail outputs and fully specified 3.3V operation. The LT6230/1/2 and LT6233/4/5 amplifiers combine features ideal for designing active filters and driving A/D converters in instrumentation, communications and medical equipment.

The LT6233/4/5 are single/dual/quad ultra low noise, rail-to-rail output, unity gain stable op amps that feature 1.9nV/rtHz noise voltage and draw only 1.15mA of supply current per amplifier. These amplifiers combine very low noise and supply current with a 60MHz gain bandwidth product, a 17V/¼s slew rate and are optimized for low supply voltage signal conditioning systems. The LT6233-10 is a 375MHz single amplifier optimized for higher gain applications.

The LT6230/1/2 are higher speed versions that offer 215MHz gain bandwidth and an even lower voltage noise of 1.1nV/rtHz, yet still draw a best-in-class 3.4mA of supply current per amplifier. The decompensated version for closed-loop gains greater than 10 (LT6230-10) offers a gain bandwidth product of 1.45GHz and 320V/¼S slew rate.

All amplifiers have an output that swings within 50mV of either supply rail to maximize the signal dynamic range in low supply applications. Input offset voltage is trimmed to less than 350¼V ” exceptional for a high-speed amplifier. The devices are fully specified on 3.3V, 5V and 5V supplies, and are guaranteed over the commercial (0C to 70C) and industrial (-40C to +85C) temperature ranges.

The single versions (LT6230/3) offer an enable pin and are available in the 6-lead SOT-23 package. The duals (LT6231/4) are offered in the 8-pin SO package with industry standard pinouts. For compact layouts, the duals are also available in a tiny 3x3x0.8mm dual, flat leadless package (DFN). The quads (LT6232/5) are available in the space-saving 16-pin SSOP package.

All versions are now in full production, with pricing from $1.25 in 1k quantities.

Summary of Features:
Noise Voltage:
1.1nV/rtHz (LT6230/1/2)
1.9nV/rtHz (LT6233/4/5)

Supply Current:
3.4mA (LT6230/1/2)
1.1mA (LT6233/4/5)

Offset Voltage: 350V Max
Speed: 60MHz to 1.45GHz versions
Supply Range: 3V to 12.6V
Output Swings Rail-to-Rail
Common Mode Rejection Ratio: 115dB
Output Current: 30mA
Operating Temperature Range: -40C to 85C
Shutdown to 10uA Max (singles)
Tiny ThinSOT, DFN, SO-8 and SSOP packages

Linear Technology Corporation 1630 McCarthy Boulevard Milpitas, CA 95035-7417. Tel: 408-432-1900 or toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site:



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