Low-Noise Op Amps draw only 1.15 mA.

Press Release Summary:

Offered in Tiny ThinSOT(TM), DFN, SO-8 and SSOP packages, operational amplifiers feature rail-to-rail outputs and are specified for 3.3 V operation. Models LT®6233/4/5 are single/dual/quad rail-to-rail output, unity gain stable op amps that feature 1.9 nV/rtHz noise voltage, 60 MHz gain bandwidth, and 17 V/µs slew rate and draw 1.15 mA of supply current per amplifier. Models LT6230/1/2 offer 215 MHz gain bandwidth and 1.1 nV/rtHz voltage noise and draw 3.4 mA of supply current.

Original Press Release:

Ultra Low Noise Op Amps Draw Only 1.15mA

New LT6230/1/2 & LT6233/4/5 Offer Rail-to-Rail Outputs & 3V Operation

MILPITAS, CA - February 19, 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 LT®6233/4/5 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/us 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/uS slew rate.

"Portable instrumentation and high channel count applications that demand high speed, low noise amplification and filtering will immediately reap the benefits of the dramatically reduced current draw," comments Erik Soule, product marketing manager for LTC's Signal Conditioning Products. "The devices save power across the board, even the shutdown current has been reduced to less than a microamp. These new amplifiers really push the power vs. noise curve off the chart."

Both families of 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 350uV - exceptional for a high-speed amplifier. The devices are fully specified on 3.3V, 5V and ±5V supplies, and are guaranteed over the commercial (0°C to 70°C) and industrial (-40°C to +85°C) 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 3 x 3 x 0.8mm 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 1,000-piece quantities.

Summary of Features: LTC2435

Ultra Low Noise Voltage:

- 1.1nV/rtHz (LT6230/1/2)

- 1.9nV/rtHz (LT6233/4/5)

Low Supply Current:

- 3.4mA (LT6230/1/2)

- 1.1mA (LT6233/4/5)

Low Offset Voltage: 350uV Max

High Speed: 60MHz to 1.45GHz versions

Wide Supply Range: 3V to 12.6V

Output Swings Rail-to-Rail

Common Mode Rejection Ratio: 115dB

Output Current: 30mA

Operating Temperature Range: -40°C to 85°C

Shutdown to 10uA Max (Singles)

Tiny ThinSOT(TM), DFN, SO-8 and SSOP Packages

Company Background

Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequencydevices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.

Note: LT, AND LTC are registered trademarks of Linear Technology Corp.

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