TS1100 Current-Sense Amplifiers

By Touchstone Semiconductor 169

TS1100 Current-Sense Amplifiers

Touchstone Semiconductor's voltage-output TS1100 current-sense amplifiers are form-factor identical and electrical improvements to the MAX9938 and the MAX9634 current-sense amplifiers. Consuming a very low 1 µA supply current, the TS1100 high-side current-sense amplifiers exhibit a 50 µV (max) VOS and a 0.5% (max) gain error, both specifications optimized for any precision current measurement. For all high-side current-sensing applications, the TS1100 features a wide input common-mode voltage range from 1.6 V to 25 V.

The SOT23 package makes the TS1100 an ideal choice for PCB-area-critical, low-current, high-accuracy current-sense applications in all battery-powered and portable instruments.

All TS1100s are specified for operation over the -40°C to 105°C extended temperature range.

  • Improved electrical performance over the MAX9938 and the MAX9634
  • Ultra-low supply current: 1 µA
  • Wide input common mode range: +1.6 V to +25 V
  • Low input offset voltage: 50 µV (max)
  • Low gain error: <0.5% (max)
  • Notebook computers
  • Power management systems
  • Portable/battery-powered systems
  • Smart chargers
  • Smart phones

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