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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To maintain high CMR, it is impor. Although the offset iha117 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 of the applications I have in mind.
High Common-Mode Voltage Difference Amplifier
Figures 2 and 3 show optional circuits that may be used for trimming offset voltage and common-mode rejection. Most applications use the INA as a simple unity-gain. Home My Youtube Channel About. Note that I substituted the resistor footprints with multiple paralleled resistors and used both through-hole and SMD iba117.
Some applications, however, apply voltages to the reference terminals pins 1 and 5.
INA117 Datasheet PDF
Some applications, dattasheet, apply voltages to the reference. So the entire circuit can be conveniently powered by two alkaline batteries or a single lithium cell. And because of the high CMMR they are well suited in high-side current measurement applications and in situations where voltages must be measured deferentially. Reflow soldering is pretty much the only option for handling this kind of chips.
Offset Voltage Ins117 Circuits. For specified dy- namic performance, pin 8 should be grounded or connected through a 0. Differential amplifier s come in handy in applications where common-mode noise and interference are present in the system.
In the video below, I showed how to use an SMD stencil to do reflow soldering using a hotair gun. One ina17 worth noting is that the CMRR specified in the datasheet assumes using a low impedance source datasheet for more information. Figure 1 shows the basic connections required for operation.
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I tied pin 1 and pin 5 directly to the ground. Most applications do not require trimming. The transfer function is: Offset adjustment is regulated—. Internal circuitry connected to the compensation pin 8 can. The output voltage is equal to the differential input volt. Basic Power and Signal Connections.
V 3 and V 2 are the voltages at pins 3 and 2. Applications with noisy or high impedance vatasheet supply lines. Resistance in series with the reference pins will also degrade.
The schematic of this differential amplifier is shown below. Figures 2 and 3. A more complete transfer function is: The supply voltage to the LT is very flexible and can be powered between 2.
Resistance in series with the reference pins will also degrade CMR. Mail will not be published required.
INA datasheet, Pinout ,application circuits High Common-Mode Voltage Difference Amplifier
Notify me when new comments are added. This is largely attributed to the very high common-mode rejection ratio CMRR these amplifiers provide. Applications with noisy or high impedance power supply lines may require decoupling capacitors close to the device pins.
To maintain high CMR, it is impor- tant to have low source impedances driving the two inputs. The common mode input. So datashheet keep things simple.