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INA302A3IPWR
Public Unreviewedby Ray
Texas Instruments Current Sense Amplifiers, TSSOP-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownINA302A3IPWR
Texas Instruments · Current Sense Amplifiers · TSSOP-14
INA302A3IPWR from Texas Instruments, in a TSSOP-14. 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 | VS | power_in | Analog power supply input, 2.7 V to 5.5 V. Bypass to GND with a 0.1 µF ceramic capacitor placed close to the pin. Maximum supply current is 950 µA. |
| 2 | OUT | output | Analog output voltage proportional to the differential input voltage across IN+/IN- multiplied by the amplifier gain (100 V/V for A3 version). Output is referenced to the REF pin. |
| 3 | LIMIT1 | input | ALERT1 threshold limit input. Sets the trip threshold for comparator 1 via an external resistor divider; see Setting Alert Thresholds section. Range 0 V to VS. |
| 4 | REF | input | Reference voltage input for the current-sense amplifier output, 0 V to VS. Sets the zero-current output voltage; typically driven from a precision reference or from VS/2 for bidirectional current sensing. |
| 5 | GND | power_in | Analog ground return for the supply and internal reference circuitry. |
| 6 | LATCH1 | input | Digital input selecting transparent or latched mode for the ALERT1 output. Transparent mode tracks the comparator state; latched mode holds the ALERT1 asserted until reset. |
| 7 | LATCH2 | input | Digital input selecting transparent or latched mode for the ALERT2 output. Transparent mode tracks the comparator state; latched mode holds the ALERT2 asserted until reset. |
| 8 | NC | unconnected | No internal connection. Leave floating or tie to GND per board layout preference. |
| 9 | LIMIT2 | input | ALERT2 threshold limit input. Sets the trip threshold for comparator 2 via an external resistor divider; see Setting Alert Thresholds section. Range 0 V to VS. |
| 10 | DELAY | input | Delay timing input for comparator 2. An external capacitor to GND sets the ALERT2 response delay from 2 µs to 10 s; see Alert Outputs section. |
| 11 | ALERT2 | output | Open-drain, active-low alert output driven by comparator 2. For the INA302 this is a second overlimit alert; for the INA303 (window comparator) this is the underlimit alert. Requires an external pull-up resistor (e.g., 10 kΩ) to a supply ≤6 V. |
| 12 | ALERT1 | output | Open-drain, active-low overlimit alert output driven by comparator 1 (response time <1 µs). Requires an external pull-up resistor (e.g., 10 kΩ) to a supply ≤6 V. |
| 13 | IN- | input | Inverting current-sense input. Connect to the load side of the external current-sense (shunt) resistor. Common-mode range -0.1 V to +36 V, independent of VS. |
| 14 | IN+ | input | Non-inverting current-sense input. Connect to the supply side of the external current-sense (shunt) resistor. Common-mode range -0.1 V to +36 V, independent of VS. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-14 |
| Category | Amplifiers/Comparators |
| Pins | 14 |
Ordering variants
Same part, different packaging or reel option.
INA302A3IPWR
CAD (KiCad official)
- Symbol:
INA302A3IPWR - Footprint:
Package_SO:TSSOP-14_4.4x5mm_P0.65mm - 3D model: TSSOP-14 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (None pp, sha256
1610232399ad3a07, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).