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ina326ea
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Texas Instruments Instrumentation OpAmps, VSSOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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markdownINA326EA
Texas Instruments · Instrumentation OpAmps · VSSOP-8
INA326EA from Texas Instruments, in a VSSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | R1 | passive | Gain-set resistor terminal. External R1 is connected between pins 1 and 8 to set the input-stage gain. Minimize stray capacitance on this node for best high-frequency CMR; recommended R1 ≥ 2kΩ. |
| 2 | VIN- | input | Inverting analog input. Rail-to-rail input range extending from (V-) - 0.02V to (V+) + 0.1V. Diode-clamped to supply rails; external signals must be current-limited to ±10mA if they can swing more than 0.5V beyond the rails. |
| 3 | VIN+ | input | Non-inverting analog input. Rail-to-rail input range from (V-) - 0.02V to (V+) + 0.1V. Diode-clamped to supply rails; external signals must be current-limited to ±10mA if they can swing more than 0.5V beyond the rails. |
| 4 | V- | power_in | Negative supply pin. Tie to GND for single-supply operation (+2.7V to +5.5V) or to the negative rail for dual-supply operation (e.g. -2.5V). A 0.1µF bypass capacitor from pin 7 (V+) to pin 4 (V-) placed close to the device is strongly recommended. |
| 5 | R2/IACOMMON | passive | Output reference terminal / low side of external R2. This node (IACOMMON) sets the output offset reference; the output voltage is referenced to IACOMMON. R2 (typically 100kΩ) connects between pins 5 and 6 to set the output-stage gain. Must be sufficiently filtered to avoid nonlinearity with large output swings. |
| 6 | VO | output | Amplifier output. Rail-to-rail, swings to within 10mV of the supply rails. Continuous short-circuit protected. Connects to the top of external R2 and to the optional output filter (RO/CO) that combines with C2 for a 2-pole response. |
| 7 | V+ | power_in | Positive supply pin. Single-supply operation from +2.7V to +5.5V, or +2.5V in split-supply operation. Absolute maximum +5.5V. A 0.1µF bypass capacitor from pin 7 (V+) to pin 4 (V-) placed close to the device is strongly recommended. |
| 8 | R1 | passive | Gain-set resistor terminal. External R1 connects between pins 1 and 8 to set the input-stage gain (G = 2·R2/R1). Minimize stray capacitance on this node for best high-frequency CMR; R1 must be ≥ 2kΩ. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |
Ordering variants
INA326EA/250INA326EA/2K5
CAD (KiCad official)
- Symbol:
INA326EA - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (None pp, sha256
65b97a2e89a1ca1a, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).