LPV521 - Nanopower, 350 nA, 1.6 V RRIO Single, CMOS input op amp

The LPV521 is a single nanopower 552-nW amplifier designed for ultra long life battery applications. The operating voltage range of 1.6 V to 5.5 V coupled with typically 351 nA of supply current make it well suited for RFID readers and remote sensor nanopower applications. The device has input common mode voltage 0.1 V over the rails, guaranteed TCV_OS and voltage swing to the rail output performance. The LPV521 has a carefully designed CMOS input stage that outperforms competitors with typically 40 fA I_BIAS currents. This low input current significantly reduces I_BIAS and I_OS errors introduced in megohm resistance, high impedance photodiode, and charge sense situations. The LPV521 is a member of the PowerWise family and has an exceptional power-to-performance ratio.

The wide input common mode voltage range, guaranteed 1 mV V_OS and 3.5 µV/°C TCV_OS enables accurate and stable measurement for both high-side and low-side current sensing.

EMI protection was designed into the device to reduce sensitivity to unwanted RF signals from cell phones or other RFID readers.

The LPV521 is offered in the 5-pin SC70 package.

• For V_S = 5 V, Typical Unless Otherwise Noted
  • Supply Current at V_CM = 0.3 V 400 nA (Max)
  • Operating Voltage Range 1.6 V to 5.5 V
  • Low TCV_OS 3.5 µV/°C (Max)
  • V_OS 1 mV (Max)
  • Input Bias Current 40 fA
  • PSRR 109 dB
  • CMRR 102 dB
  • Open-Loop Gain 132 dB
  • Gain Bandwidth Product 6.2 kHz
  • Slew Rate 2.4 V/ms
  • Input Voltage Noise at f = 100 Hz 255 nV/√Hz
  • Temperature Range –40°C to 125°C