TS1102 Current-Sense Amplifiers

By Touchstone Semiconductor 199

TS1102 Current-Sense Amplifiers

Touchstone Semiconductor's voltage-output TS1102 current-sense amplifiers are form-factor identical and electrical improvements to the MAX9938 and the MAX9634 current-sense amplifiers. The TS1102 is the latest addition to the TS1100 family of unidirectional current-sense amplifiers. Consuming a very low 1 µA supply current, the TS1102 high-side current-sense amplifiers combine a 200-μV (max) VOS and a 0.5% (max) gain error for cost-sensitive applications. For all high-side current-sensing applications, the TS1102 features a wide input common-mode voltage range from 2 V to 25 V.

The SOT23 package makes the TS1102 an ideal choice for pcb-area-critical, low-current, high-accuracy current-sense applications in all battery-powered, remote or hand-held portable instruments. All TS1102s 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: +2 V to +25 V
  • Low input offset voltage: 200 µV (max)
  • Low gain error: 0.5% (max)
  • Voltage output
  • 5-Pin 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
  • Notebook computers
  • Current-shunt measurement
  • Power management systems
  • Battery monitoring
  • Motor control
  • Load protection
  • Smart battery packs/chargers