Datasheet

1
FEATURES DESCRIPTION
APPLICATIONS
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50kW
150kW 150kW
A
1
A
3
V
OUT
V
IN-
6
REF
5
RFIFilteredInputs
2
V+
7
V-
4
1
8
150kW 150kW
50kW
A
2
V
IN+
RFIFilteredInputs
3
INA333
R
G
G=1+
100kW
R
G
RFIFilteredInputs
RFIFilteredInputs
INA333
www.ti.com ..................................................................................................................................................... SBOS445B – JULY 2008 – REVISED OCTOBER 2008
Micro-Power (50 µ A), Zer ø -Drift, Rail-to-Rail Out
Instrumentation Amplifier
2
• LOW OFFSET VOLTAGE: 25 µ V (max), G ≥ 100
The INA333 is a low-power, precision instrumentation
amplifier offering excellent accuracy. The versatile
• LOW DRIFT: 0.1 µ V/ ° C, G ≥ 100
3-op amp design, small size, and low power make it
• LOW NOISE: 50nV/ √ Hz, G ≥ 100
ideal for a wide range of portable applications.
• HIGH CMRR: 100dB (min), G ≥ 10
A single external resistor sets any gain from 1 to
• LOW INPUT BIAS CURRENT: 200pA (max)
1000. The INA333 is designed to use an
• SUPPLY RANGE: +1.8V to +5.5V
industry-standard gain equation: G = 1 + (100k Ω /R
G
).
• INPUT VOLTAGE: (V – ) +0.1V to (V+) – 0.1V
The INA333 provides very low offset voltage (25 µ V,
• OUTPUT RANGE: (V – ) +0.05V to (V+) – 0.05V
G ≥ 100), excellent offset voltage drift (0.1 µ V/ ° C,
G ≥ 100), and high common-mode rejection (100dB
• LOW QUIESCENT CURRENT: 50 µ A
at G ≥ 10). It operates with power supplies as low as
• OPERATING TEMPERATURE: – 40 ° C to +125 ° C
1.8V ( ± 0.9V), and quiescent current is only
• RFI FILTERED INPUTS
50 µ A — ideal for battery-operated systems. Using
autocalibration techniques to ensure excellent
• MSOP-8 AND DFN-8 PACKAGES
precision over the extended industrial temperature
range, the INA333 also offers exceptionally low noise
density (50nV/ √ Hz) that extends down to dc.
• BRIDGE AMPLIFIERS
The INA333 is available in both MSOP-8 and DFN-8
• ECG AMPLIFIERS
surface-mount packages and is specified over the
• PRESSURE SENSORS
T
A
= – 40 ° C to +125 ° C temperature range.
• MEDICAL INSTRUMENTATION
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• PORTABLE INSTRUMENTATION
• WEIGH SCALES
• THERMOCOUPLE AMPLIFIERS
• RTD SENSOR AMPLIFIERS
• DATA ACQUISITION
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 All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, 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.