INA333_2 Datasheet, PDF (1/25 Pages) Texas Instruments – Micro-Power (50mA), Zerø-Drift, Rail-to-Rail Out Instrumentation Amplifier

INA333
www.ti.com ..................................................................................................................................................... SBOS445B – JULY 2008 – REVISED OCTOBER 2008
Micro-Power (50µA), Zerø-Drift, Rail-to-Rail Out
Instrumentation Amplifier
FEATURES
1
•2 LOW OFFSET VOLTAGE: 25µV (max), G ≥ 100
• LOW DRIFT: 0.1µV/°C, G ≥ 100
• LOW NOISE: 50nV/√Hz, G ≥ 100
• HIGH CMRR: 100dB (min), G ≥ 10
• LOW INPUT BIAS CURRENT: 200pA (max)
• SUPPLY RANGE: +1.8V to +5.5V
• INPUT VOLTAGE: (V–) +0.1V to (V+) –0.1V
• OUTPUT RANGE: (V–) +0.05V to (V+) –0.05V
• LOW QUIESCENT CURRENT: 50µA
• OPERATING TEMPERATURE: –40°C to +125°C
• RFI FILTERED INPUTS
• MSOP-8 AND DFN-8 PACKAGES
APPLICATIONS
• BRIDGE AMPLIFIERS
• ECG AMPLIFIERS
• PRESSURE SENSORS
• MEDICAL INSTRUMENTATION
• PORTABLE INSTRUMENTATION
• WEIGH SCALES
• THERMOCOUPLE AMPLIFIERS
• RTD SENSOR AMPLIFIERS
• DATA ACQUISITION
DESCRIPTION
The INA333 is a low-power, precision instrumentation
amplifier offering excellent accuracy. The versatile
3-op amp design, small size, and low power make it
ideal for a wide range of portable applications.
A single external resistor sets any gain from 1 to
1000. The INA333 is designed to use an
industry-standard gain equation: G = 1 + (100kΩ/R_G).
The INA333 provides very low offset voltage (25µV,
G ≥ 100), excellent offset voltage drift (0.1µV/°C,
G ≥ 100), and high common-mode rejection (100dB
at G ≥ 10). It operates with power supplies as low as
1.8V (±0.9V), and quiescent current is only
50µA—ideal for battery-operated systems. Using
autocalibration techniques to ensure excellent
precision over the extended industrial temperature
range, the INA333 also offers exceptionally low noise
density (50nV/√Hz) that extends down to dc.
The INA333 is available in both MSOP-8 and DFN-8
surface-mount packages and is specified over the
T_A = –40°C to +125°C temperature range.
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V+
7
2
V_IN-
1
R_G
8
RFI Filtered Inputs
A₁
RFI Filtered Inputs
50kW
50kW
150kW
150kW
A₃
6 _VOUT
3
V_IN+
RFI Filtered Inputs
RFI Filtered Inputs
A₂
4
V-
150kW
150kW
5 _REF
INA333
100kW
G=1+
R_G
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.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated