ADC simultaneously samples 6 differential inputs.

Press Release Summary:

Available in 32-pin QFN package, Model LTC1408 14-bit ADC samples 0-2.5 V unipolar and ±1.25 V bipolar differential inputs at speeds up to 600 kS/sec. Serial 3-wire unit operates from single 3 V supply with power dissipation of 15 mW typ in active mode, 3.3 mW in nap mode, and 6 µW in sleep mode. LTC1408 allows design of compact, battery-powered, and portable data acquisition systems.

Original Press Release:

Low-Power ADC Simultaneously Samples 6 Differential Inputs

600ksps Serial ADC Operates from Single 3V Supply at 15mW

MILPITAS, CA - April 6, 2006 - Linear Technology Corporation introduces the LTC1408, a low-power 14-bit 600ksps analog-to-digital converter (ADC) with six simultaneous sampling differential inputs. This 3-wire serial ADC operates from a single 3V supply, with power dissipation typically 15mW. The LTC1408 is available in a 32-pin (5mm x 5mm) QFN package. With less than 1/10th the power consumption and 1/5th the package size of the nearest competitor, the LTC1408 allows the design of compact, battery-powered, and portable data acquisition systems. The six simultaneously sampled differential inputs make this device the ideal choice for multiphase power measurement, multiphase motor control, data acquisition systems, and uninterruptable power supplies.

When the LTC1408 is not converting, power dissipation can be further reduced to 3.3mW in Nap mode with the internal 2.5V reference remaining active, and to 6uW in Sleep mode, with all internal circuitry powered down. The internal reference can also be overdriven with an external reference, up to the analog supply voltage.

The LTC1408 uses three input-select lines to configure the number of differential inputs converted. Thus, higher speeds are possible, from one differential input at 600ksps to six differential inputs at 100ksps. The six conversion results are delivered sequentially to a high speed DSP serial port via a 3-wire interface. This ADC also features a separate digital output power supply pin and a bipolar/unipolar pin to select ±1.25V bipolar or 0V to 2.5V unipolar input ranges.

The LTC1408 is available in the commercial and industrial temperature ranges. Pricing begins at $8.95 in 1,000-piece quantities.

Summary of Features: LTC1408
600ksps Sampling ADC with 6 Simultaneous Differential Inputs
100ksps Throughput Per Channel
Low Power Dissipation:
o Active Mode (15mW)
o NAP Shutdown Mode (3.3mW)
o SLEEP Shutdown Mode (6uW)
3V Single Supply Operation
0V to 2.5V Unipolar/ ±1.25V Bipolar Differential Input Range
2.5V Internal Reference, Can Be Overdriven with External Reference
3-Wire Serial Interface
83dB Common Mode Rejection Ratio at 100kHz
Tiny 32-Pin (5mm x 5mm) QFN Package

About Linear Technology

Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit

Worldwide Contacts

North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419

Doug Dickinson
Tel: (408) 432 1900 ext. 2233

China (PRC)
Fanny Lau
Tel: 852-2428-0303

Kazuto Takahashi
Tel: 81-3-5226-7291

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