INA117 DATASHEET PDF
The INA is a precision unity-gain difference amplifier with very high common- mode input voltage range. It is a single monolithic IC consisting of a precision. Texas Instruments INA Series Differential Amplifiers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments . AD vs. INA Error Budget Analysis Example 1 (VCM = V dc). Error, ppm of FS. Error Source. AD INA AD INA ACCURACY, TA = 25° C.
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High Common-Mode Voltage Difference Amplifier
V 5 and V 1 are the voltages at pins 5 and 1. Although the offset voltage and CMRR can be trimmed by adding external resistor networks between pin 1 and pin 5, by default the amplifier is accurate enough for most datsaheet the applications I have in mind.
Home My Youtube Channel About. One thing worth datadheet is that the CMRR specified in the datasheet assumes using a low impedance source datasheet for more information.
To maintain high CMR, it is impor- tant to have low source impedances driving the two inputs.
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Here is the PCB I designed for this differential amplifier. The schematic of this differential amplifier is shown below. Leave a Reply Click here to cancel reply. Some applications, however, apply voltages to the reference. Original theme by srinig.
Offset adjustment is regulated—. Note that I substituted the resistor footprints with multiple paralleled resistors and used both through-hole and SMD footprints. The common mode input. Most applications do not require trimming. Mail will not be published required. A more complete transfer function is: Notify me when new comments are added.
Applications with noisy or high impedance power supply lines may require decoupling capacitors close to the device pins. Figures 2 and 3 show optional circuits that may be used for trimming offset voltage and iina117 rejection. I tied pin 1 and pin 5 directly to the ground. Some applications, however, apply voltages to the reference terminals pins 1 and 5. Resistance in series with the reference pins will also degrade CMR.
This is based on the availability of the components I have on hand. To maintain high CMR, it is impor. The transfer function is: For specified dy- namic performance, pin 8 should be grounded or connected through a 0.
Internal circuitry connected to the compensation pin 8 can- cels the parasitic distributed capacitance between the feed- back resistor, R 2and the IC substrate. Resistance in series with the reference pins datasyeet also degrade. Offset Voltage Trim Circuits. Internal circuitry connected to the compensation pin 8 can.
A more complete transfer function. Applications with noisy or high impedance power supply lines. Figures 2 and 3.
Most applications use the INA as a simple unity-gain. The supply voltage to the LT is very flexible and can be powered between 2.