INA333_15 Datasheet, PDF (1/33 Pages) Texas Instruments – Micro-Power (50mA), Zerø-Drift, Rail-to-Rail Out Instrumentation Amplifier

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
INA333
SBOS445C – JULY 2008 – REVISED DECEMBER 2015
INA333 Micro-Power (50μA), Zerø-Drift, Rail-to-Rail Out Instrumentation Amplifier
1 Features
•1 Low Offset Voltage: 25 μV (Maximum), G ≥ 100
• Low Drift: 0.1 μV/°C, G ≥ 100
• Low Noise: 50 nV/√Hz, G ≥ 100
• High CMRR: 100 dB (Minimum), G ≥ 10
• Low Input Bias Current: 200 pA (Maximum)
• Supply Range: 1.8 V to 5.5 V
• Input Voltage: (V–) +0.1 V to (V+) –0.1 V
• Output Range: (V–) +0.05 V to (V+) –0.05 V
• Low Quiescent Current: 50 μA
• Operating Temperature: –40°C to +125°C
• RFI Filtered Inputs
• 8-Pin VSSOP and 8-Pin WSON Packages
2 Applications
• Bridge Amplifiers
• ECG Amplifiers
• Pressure Sensors
• Medical Instrumentation
• Portable Instrumentation
• Weigh Scales
• Thermocouple Amplifiers
• RTD Sensor Amplifiers
• Data Acquisition
3 Description
The INA333 device is a low-power, precision
instrumentation amplifier offering excellent accuracy.
The versatile 3-operational amplifier 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 + (100 kΩ / R_G).
The INA333 device provides very low offset voltage
(25 μV, G ≥ 100), excellent offset voltage drift
(0.1 μV/°C, G ≥ 100), and high common-mode
rejection (100 dB at G ≥ 10). It operates with power
supplies as low as 1.8 V (±0.9 V) and quiescent
current is only 50 μA, making it ideal for battery-
operated systems. Using autocalibration techniques
to ensure excellent precision over the extended
industrial temperature range, the INA333 device also
offers exceptionally low noise density (50 nV/√Hz)
that extends down to DC.
The INA333 device is available in both 8-pin VSSOP
and WSON surface-mount packages and is specified
over the T_A = –40°C to +125°C temperature range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA333
VSSOP (8)
WSON (8)
3.00 mm × 3.00 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
2
V_IN-
1
R_G
8
Simplified Schematic
V+
7
RFI Filtered Inputs
A₁
RFI Filtered Inputs
50kW
150kW
50kW
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
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.