INA333 –    Zero Drift Instrumentation Amplifier <ul><li>Source: T EXAS  I NSTRUMENTS </li></ul>
Introduction <ul><li>Purpose </li></ul><ul><ul><li>This training module introduces TI’s zero-drift technology and INA333 z...
Chopper Amplifier …  an old idea Mechanical Vibrator Synchronous Rectifier
Conventional Chopper Op Amp Frequency Domain Figure 1. Low-speed zero-offset path (10,000x gain of high-speed path)
New Synchronous Notch Filter Technology fc 3fc 5fc 7fc Synchronous clocking  assures that notches align  with harmonics Re...
TI’s Zero-Drift Amplifiers Integrated Function Power Consumption Operational Amplifiers OPA333 Offset: 0.01µV  Drift: 0.01...
Single Supply Instrumentation Amplifiers  Low Power < 500uA 500 400 300 200 100 50 Supply Current (uA) 20  50  250   500  ...
INA333 Overview <ul><li>Creates excellent accuracy: Gain Error < 0.1% </li></ul><ul><li>Ideal for maximum power efficiency...
INA333 Applications <ul><li>Portable Medical Devices </li></ul><ul><li>Handheld Instrumentation </li></ul><ul><li>Data Acq...
Basic Connections Bypass capacitor Bypass capacitor
Low Voltage Operation
Single Supply Operation To ensure that the bridge output voltage is within the common-mode range of the amplifier inputs.
Portable ECG System INA333
Weigh Scale/Bridge Sensor System INA333
Additional Resource <ul><li>For ordering the INA333, please click the part list or </li></ul><ul><li>Call our sales hotlin...
Upcoming SlideShare
Loading in …5
×

INA333 - Zero Drift Instrumentation Amplifier

3,183 views

Published on

This training module introduces TI’s zero-drift technology and INA333 zero drift Instrumentation Amplifier

  • Be the first to comment

INA333 - Zero Drift Instrumentation Amplifier

  1. 1. INA333 – Zero Drift Instrumentation Amplifier <ul><li>Source: T EXAS I NSTRUMENTS </li></ul>
  2. 2. Introduction <ul><li>Purpose </li></ul><ul><ul><li>This training module introduces TI’s zero-drift technology and INA333 zero drift Instrumentation Amplifier. </li></ul></ul><ul><li>Outline </li></ul><ul><ul><li>TI’s zero-drift technology </li></ul></ul><ul><ul><li>INA333 overview </li></ul></ul><ul><ul><li>Basic operations </li></ul></ul><ul><ul><li>Applications </li></ul></ul><ul><li>Content </li></ul><ul><ul><li>15 pages </li></ul></ul>
  3. 3. Chopper Amplifier … an old idea Mechanical Vibrator Synchronous Rectifier
  4. 4. Conventional Chopper Op Amp Frequency Domain Figure 1. Low-speed zero-offset path (10,000x gain of high-speed path)
  5. 5. New Synchronous Notch Filter Technology fc 3fc 5fc 7fc Synchronous clocking assures that notches align with harmonics Response (dB) Log Frequency Figure 1. Switched-capacitor notch filter with synchronous integration included Synchronous Filter Response
  6. 6. TI’s Zero-Drift Amplifiers Integrated Function Power Consumption Operational Amplifiers OPA333 Offset: 0.01µV Drift: 0.01µV/°C BW: 350kHz I Q = 0.025mA Vs: 1.8V Instrumentation Amplifiers INA333 Offset: 20µV Drift: 0.05µV/C BW: 150kHz I Q = 0.075mA Vs: 1.8V RRIO Current Shunt Monitors INA210 Offset: 35µV Drift: 0.5uV/C BW: 14 kHz I Q = 0.1mA Vs: 2.7V 1% accuracy Bi-directional
  7. 7. Single Supply Instrumentation Amplifiers Low Power < 500uA 500 400 300 200 100 50 Supply Current (uA) 20 50 250 500 10000 Voltage Offset uV INA333 INA321 INA322 INA332 INA122 INA126 INA118 INA331 INA125 1.8V 2.2V 2.7V 2.7V 2.7V 2.7V 2.7V 2.7V 2.7V Zero Drift Rail-to-Rail I/0 Low cost Dual available Low Drift High CMRR Sleep Mode Internal Reference RR0 and Wide BW Shutdown Dual available RRO and Wide BW Shutdown, Low cost Dual Available RRO, Shutdown Low cost, Dual avail RRO, Shutdown Dual Available RRO CMD to Ground
  8. 8. INA333 Overview <ul><li>Creates excellent accuracy: Gain Error < 0.1% </li></ul><ul><li>Ideal for maximum power efficiency </li></ul><ul><li>Easy compatibility for battery powered apps </li></ul><ul><li>Great for high impedance applications </li></ul><ul><li>Low Noise 1.6 µ V p-p (0.1 to 10Hz) </li></ul><ul><li>Enables highest accuracy possible </li></ul><ul><li>Enhances noise immunity </li></ul><ul><li>Low offset and drift: 20µV (max) with 50nV/C </li></ul><ul><li>75µs max Supply Current </li></ul><ul><li>Wide Supply Range +1.8V To +5.5V </li></ul><ul><li>Input Bias Current : 200pA Max </li></ul><ul><li>Input Voltage Noise: 50nV/rt-Hz, 1kHz </li></ul><ul><li>CMRR 106db Min at G=100 </li></ul><ul><li>RFI filtered inputs </li></ul>Applications <ul><li>Medical Instrumentation </li></ul><ul><li>Data Acquisition </li></ul><ul><li>Bridge Amplifier </li></ul><ul><li>Weigh Scales </li></ul><ul><li>Thermocouple Amplifier </li></ul><ul><li>RTD Sensor Amplifier </li></ul>MSOP-8, DFN-8 Package Features Benefits
  9. 9. INA333 Applications <ul><li>Portable Medical Devices </li></ul><ul><li>Handheld Instrumentation </li></ul><ul><li>Data Acquisition </li></ul><ul><li>Weigh Scales </li></ul><ul><li>And Many More… </li></ul>
  10. 10. Basic Connections Bypass capacitor Bypass capacitor
  11. 11. Low Voltage Operation
  12. 12. Single Supply Operation To ensure that the bridge output voltage is within the common-mode range of the amplifier inputs.
  13. 13. Portable ECG System INA333
  14. 14. Weigh Scale/Bridge Sensor System INA333
  15. 15. Additional Resource <ul><li>For ordering the INA333, please click the part list or </li></ul><ul><li>Call our sales hotline </li></ul><ul><li>For additional inquires contact our technical service hotline </li></ul><ul><li>For more product information go to </li></ul><ul><ul><li>http://focus.ti.com/docs/prod/folders/print/ina333.html </li></ul></ul>Newark Farnell

×