TS1103 Current-Sense Amplifiers

By Touchstone Semiconductor 185

TS1103 Current-Sense Amplifiers

Touchstone Semiconductor's TS1103 is the latest addition to the TS1103 family of bi-directional current-sense amplifiers. Consuming a very low 1 µA supply current, the TS1103 high-side current-sense amplifiers combine a 200-µV (max) VOS and a 0.6% (max) gain error for cost-sensitive applications. For all high-side bi-directional current-sensing applications, the TS1103s are self-powered and feature a wide input common-mode voltage range from 2 V to 25 V. A SIGN comparator digital output is also provided that indicates the direction of current flow depending on the external connections to the TS1103’s RS+ and RS- input terminals.

The SOT23 package makes the TS1103 an ideal choice for pcb-area-critical, supply-current-sensitive, high-accuracy current-sense applications in all battery-powered and portable instruments. All TS1103s are specified for operation over the -40°C to 105°C extended temperature range.

Features
  • Ultra-low supply current: 1 µA
  • Wide input common mode range: +2 V to +25 V
  • Low input offset voltage: 200µV (max)
  • Low gain error: 0.6% (max)
  • Voltage output
  • 6-lead SOT23 packaging
  • Four gain options available:
    • TS1103-25: Gain = 25 V/V
    • TS1103-50: Gain = 50 V/V
    • TS1103-100: Gain = 100 V/V
    • TS1103-200: Gain = 200 V/V
Applications
  • Notebook computers
  • Current-shunt measurement
  • Power management systems
  • Battery monitoring
  • Motor control
  • Load protection
  • Smart battery packs/chargers

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