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Design

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LPV811, LPV812

SNOSD33B – NOVEMBER 2016 – REVISED NOVEMBER 2016

LPV811/LPV812 Precision 425 nA Nanopower Operational Amplifiers

1

1 Features

1

•

Nanopower Supply Current: 425 nA/channel

•

Offset Voltage: 300 µV (max)

•

TcVos: 1 µV/°C

•

Gain-Bandwidth: 8 kHz

•

Unity-Gain Stable

•

Low Input Bias Current : 100 fA

•

Wide Supply Range: 1.6 V to 5.5 V

•

Rail-to-Rail Output

•

No Output Reversals

•

EMI Protection

•

Temperature Range: –40°C to 125°C

•

Industry Standard Packages:

–

Single in 5-pin SOT-23

–

Dual in 8-pin VSSOP

2 Applications

•

CO and O2 Gas Detectors (TIDA-0756)

•

PIR Motion Detectors

•

Current Sensing

•

Thermostats

•

IoT Remote Sensors

•

Active RFID Readers and Tags

•

Portable Medical Equipment

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

3 Description

The LPV811 (single) and LPV812 (dual) are a ultra-

low-power precision operational amplifier family for

“Always ON” sensing applications in battery powered

wireless and low power wired equipment. With 8 kHz

of bandwidth from 425 nA of quiescent current and a

trimmed offset voltage to under 300µV, the LPV81x

amplifiers

provide

the

required

precision

while

minimizing power consumption in equipment such as

gas detectors and portable electronic devices where

operational battery-life is critical.

In addition to being ultra-low-power, the LPV81x

amplifiers have CMOS input stages with fempto-amp

bias currents for impedance source applications. The

LPV81x amplifiers also feature a negative-rail sensing

input stage and a rail-to-rail output stage that swings

within millivolts of the rails, maintaining the widest

dynamic range possible. EMI protection is designed

into the LPV81x in order to reduce system sensitivity

to unwanted RF signals from mobile phones, WiFi,

radio transmitters, and tag readers.

Device Information(1)

PART

NUMBER

PACKAGE

BODY SIZE

LPV811

SOT-23 (5)

2.90 mm x 1.60 mm

LPV812

VSSOP (8)

3.00 mm × 3.00 mm

LPV8xx Family of Nanopower Amplifiers

PART

NUMBER

CHANNELS

SUPPLY

CURRENT

(Typ/Ch)

OFFSET

VOLTAGE

(Max)

LPV801

1

500 nA

3.5 mV

LPV802

2

320 nA

3.5 mV

LPV811

1

450 nA

370 µV

LPV812

2

425 nA

300 µV

Figure 1. Nanopower CO Sensor

Figure 2. LPV812 Offset Voltage Distribution