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Texas Instruments LPV521 Single Nanopower Operational Amplifiers

Texas Instruments LPV521 Single Nanopower Operational Amplifiers are designed for battery applications that require ultra-long life. A typical supply current of 351nA and an operating voltage range of 1.6V to 5.5V make this device an excellent choice for remote-sensor nanopower and RFID reader applications. The device has voltage-swing-to-the-rail output performance and an input common-mode voltage of 0.1V over the rails, specified TCVOS. The input stage of the LPV521 is carefully designed with a CMOS input stage that outperforms competitors with typically 40fA IBIAS currents. This low input current significantly reduces IOS and IBIAS errors introduced in megohm resistance, high-impedance photodiode, and charge sense applications.

The Texas Instruments LPV521 has an exceptional power-to-performance ratio and is part of the PowerWise family. The specified 1mV VOS, wide input common-mode voltage range, and 3.5µV/°C TCVOS enables stable and accurate measurements for both high-side and low-side current sensing. EMI protection is designed into the device to reduce sensitivity to unwanted RF signals from cell phones or other RFID readers. The LPV521 is offered in 5-pin SC70 and 8-pin PDIP packages.

Features

  • Supply current at VCM = 0.3V of 400nA (max)
  • 1.6V to 5.5V operating voltage range
  • Low TCVOS of 3.5µV/°C (max)
  • 1mV (max) VOS
  • 40fA input bias current
  • PSRR of 109dB
  • CMRR of 102dB
  • 132dB open-loop gain
  • 6.2kHz gain-bandwidth product
  • 2.4V/ms slew rate
  • Input voltage noise at f = 100Hz of 255nV/√Hz
  • −40°C to +125°C temperature range
  • Note: For VS = 5V, typical unless otherwise noted

Applications

  • Wireless environmental sensors
  • Grid asset monitoring
  • Electricity meter
  • Smoke and heat detector
  • Gas detector
  • Portable electronics
  • Thermostat
  • Field transmitter and sensor

Functional Block Diagram

Block Diagram - Texas Instruments LPV521 Single Nanopower Operational Amplifiers

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Published: 2024-08-26 | Updated: 2024-08-29