LPV521 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier

LPV521
August 24, 2009
Nanopower, 1.8V, RRIO, CMOS Input, Operational
Amplifier
General Description
The LPV521 is a single nanopower 552 nW amplifier de-
signed for ultra long life battery applications. The operating
voltage range of 1.6V to 5.5V coupled with typically 351 nA of
supply current make it well suited for RFID readers and re-
mote sensor nanopower applications. The device has input
common mode voltage 0.1V over the rails, guaranteed
TCV_OS and voltage swing to the rail output performance. The
LPV521 has a carefully designed CMOS input stage that out-
performs competitors with typically 40 fA I_BIAS currents. This
low input current significantly reduces I_BIAS and I_OS errors in-
troduced 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-perfor-
mance 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 sen-
sitivity to unwanted RF signals from cell phones or other RFID
readers.
The LPV521 is offered in the 5-pin SC-70 package.
Features
(For V_S = 5V, Typical unless otherwise noted)
■ ^{Supply current at V}_CM ^{= 0.3V}
400 nA (max)
■ ^{Operating voltage range}
1.6V to 5.5V
■ ^{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
Applications
■ ^{Wireless remote sensors}
■ ^{Powerline monitoring}
■ ^{Power meters}
■ ^{Battery powered industrial sensors}
■ ^{Micropower oxygen sensor and gas sensor}
■ ^{Active RFID readers}
■ ^{Zigbee based sensors for HVAC control}
■ ^{Sensor network powered by energy scavenging}
Typical Application
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