Touchstone Introduces First Bidirectional, Symmetrical 1µA Current-Sense Amplifiers

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New, groundbreaking TS1101 eliminates charge/discharge dead band of competing products and reduces power by 30 times.

Touchstone Semiconductor's TS1101 Low-Power Current-Sense Amplifier

“The TS1101 defines a new state-of-the-art in current-sense amplifiers. It sets a new standard in ease-of-use, simplicity and performance.”

--Adolfo Garcia, Vice President, Marketing

Touchstone Semiconductor, Inc., a developer of high-performance analog integrated circuit solutions, today announced the TS1101, the first bidirectional, symmetrical, high-side current-sense amplifiers (CSA). The TS1101 consumes only 1µA, a 30 times reduction over the closest competing product.

The TS1101’s symmetrical architecture eliminates the “dead band” when switching from measuring battery discharge to measuring battery charge. This breakthrough significantly simplifies customer designs while, at the same time, reducing power, saving board space and improving system accuracy.

The TS1101 further improves system accuracy with input offset voltage guaranteed to be <100µV, a four times improvement over the closest competing part. The TS1101 is available in four gain options from 25V/V to 200V/V, enabling users to choose the best gain option for their application.

“The TS1101 defines a new state-of-the-art in current-sense amplifiers,” commented Adolfo Garcia, vice president of Marketing, Touchstone. “It sets a new standard in ease- of- use, simplicity and performance.”

The TS1101 is an ideal choice for low current, high-side current-sensing amplification in applications such as battery-powered and portable devices, including mobile phones, notebook computers, power management systems, motor control, load protection, current-shunt measurement and smart battery packs and chargers.

Key Specifications:

  •     Ultra-Low Supply Current: 1µA
  •     Wide Input Common Mode Range: +2V to +25V
  •     Low Input Offset Voltage: 100µV (max)
  •     Low Gain Error: <0.6%(max)
  •     6-Lead SOT23 Packaging
  •     Voltage Output
  •     Four Gain Options Available: TS1101-25: Gain = 25V/V; TS1101-50: Gain = 50V/V; TS1101-100: Gain = 100V/V; TS1101-200: Gain = 200V/V

The TS1101 is fully specified over the extended temperature range of −40°C to +105°C. The TS1101 prices start at $0.94 each in 1,000-piece quantities. The product is in stock and available from Future Electronics.

Free samples and free demo boards are available to qualified engineers. The products are part of Touchstone Semiconductor’s NanoWatt Analog™ high-performance analog integrated circuits portfolio.

Touchstone Semiconductor, Inc. ( creates high-performance analog integrated circuit solutions that solve critical problems for electronics companies. Touchstone's second-source products are pin-compatible, specification identical solutions, offering customers a long-awaited alternative source for hard to get sole-sourced products. Touchstone's proprietary products provide unique combinations of features and performance that cannot be found from any other supplier. Founded in 2010, Touchstone is headquartered in Milpitas, Calif. Its investors include Opus Capital and Khosla Ventures. Find us at Twitter:@touchstonesemi or Facebook: Touchstone Semiconductor.

Editor's Note: Photos and datasheet are available at
™NanoWatt Analog and the Touchstone Semiconductor logo are registered trademarks of Touchstone Semiconductor, Inc. All other trademarks are the property of their respective owners.

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Adolfo Garcia

Mary Hain
Hain Communications
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