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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Resistance in series with the reference pins will also degrade CMR. V 5 and V 1 are the voltages at pins 5 and 1.
Here is the PCB I designed for this differential amplifier. Reflow soldering is pretty much the only option for handling this kind of chips. Most applications use the INA as a simple unity-gain.
INA Datasheet(PDF) – Burr-Brown (TI)
The common mode input. Home My Youtube Channel About. To maintain high CMR, it is impor. Applications with noisy or high impedance power supply lines. A more complete transfer function.
Figures 2 and 3 show optional circuits that may be used for trimming offset voltage and common-mode rejection. Note that I substituted the resistor footprints with multiple paralleled resistors and used both through-hole and SMD footprints. Some applications, however, apply voltages to the reference. Since this design was meant to serve as a building block for other circuits, no impedance matching resistors are incorporated on the input side and no additional signal amplification is provided.
Basic Power and Signal Connections. So to keep things simple.
INA117 Datasheet PDF
This is based on the availability of the inz117 I have on hand. 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. Internal circuitry connected to the compensation pin 8 can- cels the parasitic distributed capacitance between the feed- back resistor, R 2and the IC substrate. I tied pin 1 and pin datazheet directly to datashest ground. The common mode input voltage is rejected. Some applications, however, apply voltages to the reference terminals pins 1 and 5.
Notify me when new comments are added. Original theme by srinig. Mail will not be published required. To maintain high CMR, it is impor- tant to have low source impedances driving the two inputs.
Internal circuitry connected to the compensation pin 8 can.
INA datasheet, Pinout ,application circuits High Common-Mode Voltage Difference Amplifier
V 3 and V 2 are the voltages at pins 3 and 2. One thing worth noting is that the CMRR specified in the datasheet assumes using a low impedance source datasheet for more information.
The schematic of this differential amplifier is shown below. Most applications do not require trimming. A more complete transfer function is: Resistance in series with the reference pins will also degrade.
The supply voltage to the LT is very flexible and can be powered between 2. Figure 1 shows the basic connections required datqsheet operation.
Datasheeet Voltage Trim Circuits. Inz117 the offset voltage and CMRR can be trimmed by adding external resistor networks between pin 1 and pin 5, by iha117 the amplifier is accurate enough for most of the applications I have in mind.
The transfer function is: Offset adjustment is regulated—. The output voltage is equal to the differential input volt. For specified dy- namic performance, pin 8 should be grounded or connected through a 0. 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.
High Common-Mode Voltage Difference Amplifier
Figures 2 and 3. Applications with noisy or high impedance power supply lines may require decoupling capacitors close to the device pins. The output voltage is equal to the differential input volt- dataheet between pins 2 and 3.