LPV811 Datasheet, PDF (1/12 Pages) Texas Instruments – Nanopower Operational Amplifiers

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LPV811, LPV812
SNOSD33 – AUGUST 2016
LPV811/LPV812 Precision 425 nA Nanopower Operational Amplifiers
1 Features
•1 Nanopower Supply Current: 425 nA/channel
• Offset Voltage: 300 µV (max)
• Good TcVos: 1.5 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
• Gas Detectors such as CO and O2
• Current Sensing
• Motion Detectors using PIR sensors
• Portable Medical Equipment
• Thermostats
• Remote Sensors, IoT
• Active RFID Readers and Tags
3 Description
The LPV811/LPV812 is an ultra-low-power
operational amplifier family for “Always ON” sensing
applications in wireless and wired equipment. With 8
kHz of bandwidth from 425 nA of quiescent current
and less than 300µV of input offset, the
LPV811/LPV812 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
LPV811/LPV812 amplifiers have CMOS input stages
with fempto-amp bias current which reduces errors
commonly introduced in transimpedance amplifier
(TIA) configurations with megaohm feedback
resistors and high source impedance applications.
The LPV811/LPV812 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.
Likewise, EMI protection is designed into the
LPV811/LPV812 in order to reduce system sensitivity
to unwanted RF signals from mobile phones, WiFi,
radio transmitters, and tag readers.
The LPV811/LPV812 amplifiers operate with a single
supply voltage as low as 1.6V, ensuring continuous
performance in low battery situations over the
extended temperature range of -40ºC to 125ºC. The
single and dual channel versions are available in
industry standard 5-pin SOT-23 and 8-pin VSSOP
packages respectively.
PART
NUMBER
LPV811
LPV812
Device Information⁽¹⁾
PACKAGE
BODY SIZE
SOT-23 (5)
VSSOP (8)
2.90 mm x 1.60 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Nanopower Oxygen Sensor
100 M
Nanopower CO Sensor
1M
+
V
1M
+
R_L
V_OUT
+
V
R_L
CO
+
Sensor
V_OUT
OXYGEN SENSOR
1
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. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.