10 M:

-

+

10 M:

10 M:

10 M:

10 M:

270 pF

270 pF

270 pF

CR2032 Coin Cell

225 mAh = 5 circuits @ 9.5 yrs.

60 Hz Twin T Notch Filter

10 M:

270 pF

Remote Sensor

Signal

+

60 Hz

To ADC

Signal × 2

(No 60 Hz)

LPV521

www.ti.com

SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013

LPV521 Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier

Check for Samples: LPV521

1

FEATURES

DESCRIPTION

The LPV521 is a single nanopower 552 nW amplifier

23

•

designed for ultra long life battery applications. The

–

operating voltage range of 1.6V to 5.5V coupled with

–

Operating Voltage Range 1.6V to 5.5V

typically 351 nA of supply current make it well suited

for RFID readers and remote sensor nanopower

–

applications. The device has input common mode

–

–

Input Bias Current 40 fA

voltage swing to the rail output performance. The

LPV521 has a carefully designed CMOS input stage

–

PSRR 109 dB

–

CMRR 102 dB

currents. This low input current significantly reduces

–

Open Loop Gain 132 dB

high impedance photodiode, and charge sense

–

Gain Bandwidth Product 6.2 kHz

situations.

The

LPV521

is

a

member

of

the

–

Slew Rate 2.4 V/ms

–

Input Voltage Noise at f = 100 Hz 255

performance ratio.

nV/

√Hz

The

wide

input

common

mode

voltage

range,

–

Temperature Range

−40°C to 125°C

accurate and stable measurement for both high side

APPLICATIONS

and low side current sensing.

•

Wireless Remote Sensors

EMI protection was designed into the device to

•

Powerline Monitoring

reduce sensitivity to unwanted RF signals from cell

phones or other RFID readers.

•

Power Meters

•

Battery Powered Industrial Sensors

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

•

Micropower Oxygen sensor and Gas Sensor

•

Active RFID Readers

•

Zigbee Based Sensors for HVAC Control

•

Sensor Network Powered by Energy

Scavenging

Typical Application

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerWise is a registered trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.