INA163UA - Low-Noise Instrumentation Amplifier | Texas Instruments
Référence : INA163UA ✓ ActifINA163UA Présentation
An instrumentation amplifier is a specialized analog amplifier that provides differential gain, high input impedance, and accurate common-mode rejection. The INA163UA combines these functions in a single IC, simplifying signal-chain design when a sensor or balanced source must be amplified before measurement, conversion, or audio processing. Its current-feedback approach differentiates it from voltage-feedback amplifiers and is particularly useful where bandwidth and dynamic response need to remain strong over multiple gain settings.
The principal benefit of the INA163UA is low-noise signal conditioning in demanding analog systems. Low noise preserves small-signal information and can improve the usable dynamic range of downstream converters, audio equipment, and laboratory instruments. Low distortion helps maintain signal integrity when the input contains high-quality content and the amplifier operates at practical signal levels. The device is also suitable for applications that require a compact solution rather than a discrete three-amplifier instrumentation-amplifier implementation.
Typical uses include balanced microphone preamplification, audio signal conditioning, industrial measurement systems, medical instrumentation, and low-level sensor interfaces. The 14-pin SOIC package supports conventional surface-mount assembly and provides a practical upgrade path when a design requires low noise and low distortion in a compact analog IC.
Designers should use the manufacturer datasheet for the complete electrical limits, gain configuration, pin assignments, recommended operating conditions, and application circuit. PCB layout should keep input and feedback connections short, maintain a clean ground reference, and place compensation or filtering components close to their associated pins. This page combines manufacturer information, distributor references, package details, practical design guidance, and drop-in alternative evaluation for faster component selection.
Alternatives de remplacement direct pour INA163UA — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec INA163UA (même facteur de forme et même empreinte) — différant par Package, Input Offset Voltage, Product Type, Amplifier Type, Architecture.
INA163UA/2K5
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
INA163UA/2K5G4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
INA163UAE4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
INA166UA
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →INA155UA
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →INA163UA Valeurs maximales et caractéristiques électriques
| Product Type | Low-noise, low-distortion instrumentation amplifier |
| Architecture | Monolithic current-feedback instrumentation amplifier |
| Number of Circuits | 1 circuit |
| Boîtier | 14-pin SOIC |
| Type de montage | Surface mount |
| Termination/Packing Code | UA package code |
Guide de configuration des broches du INA163UA 14-pin soic
Configuration des broches du INA163UA (boîtier 14-pin soic). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour INA163UA.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
INA163UA convient pour 6 applications: Balanced Microphone Preamplifier, Audio Signal Conditioning, Industrial Sensor Interface, Medical Instrumentation, Precision Data Acquisition, Low-Level Bridge Measurement.
Balanced Microphone Preamplifier
The INA163UA fits balanced low-impedance microphone preamplification because Texas Instruments identifies low noise, low distortion, current-feedback circuitry, wide bandwidth, and excellent dynamic response as central characteristics. The instrumentation amplifier accepts the differential microphone signal while helping reject common-mode noise present on balanced lines. In a practical audio front end, it can sit between a microphone connector and an audio converter or line stage. The design should use the gain and feedback arrangement from the manufacturer datasheet, maintain a low-impedance ground reference, and verify output swing, bandwidth, and distortion against the microphone sensitivity and downstream headroom.
Recommandé
Audio Signal Conditioning
The INA163UA is appropriate for conditioning low-level balanced audio signals before conversion, mixing, or amplification. Its low-noise, low-distortion instrumentation-amplifier architecture helps retain small-signal detail while providing the differential gain and common-mode rejection expected in professional audio equipment. Current-feedback circuitry is valuable when the design needs broad bandwidth and strong dynamic response over multiple gain settings. Confirm the required gain against the source level, place any input or feedback filtering close to the relevant pins, and verify output-headroom limits for the chosen supply configuration.
Recommandé
Industrial Sensor Interface
The INA163UA can amplify differential sensor outputs when low noise and accurate signal representation are important. Instrumentation-amplifier behavior helps reject common-mode voltage that may exist on industrial wiring, while the low-noise design preserves weak sensor signals. A typical circuit places the sensor near the input stage, routes the differential pair away from switching nodes, and converts the conditioned output into a measurement or control system. Before selecting the device, confirm the sensor output range, required gain, input common-mode limits, supply voltage, bandwidth, and isolation or protection requirements.
Recommandé
Medical Instrumentation
The INA163UA's low-noise, low-distortion characteristics suit medical instrumentation that must preserve small differential signals. It can provide input amplification for suitable sensing elements while rejecting common-mode interference on connected leads. Medical use also depends on the complete system risk assessment, isolation architecture, patient protection, leakage requirements, and applicable regulatory validation; the amplifier qualification alone does not establish medical-system compliance. Use the manufacturer datasheet for operating limits and implement the recommended grounding, filtering, and protection methods for the specific sensing topology.
Recommandé
Precision Data Acquisition
The INA163UA can serve as the analog front end of a precision data-acquisition channel when the source is differential and the signal level is low. Its low-noise, low-distortion architecture supports accurate amplification before an ADC, while current-feedback behavior provides wide bandwidth and excellent dynamic response. The implementation should minimize trace length around the high-impedance input and sensitive feedback nodes, maintain a stable reference ground, and select gain without saturating the converter. Compare the amplifier's noise, distortion, common-mode range, and settling behavior with the ADC acquisition window and input bandwidth.
Recommandé
Low-Level Bridge Measurement
The INA163UA is suitable for front-end amplification of suitable resistive bridge outputs because differential instrumentation-amplifier operation helps reject common-mode excitation and supply-related noise. Low input noise is important when the bridge imbalance is small, while low distortion preserves linear scaling for downstream conversion. A complete design must include excitation, reference, lead compensation, input filtering, and output-scaling calculations. Confirm the bridge impedance, common-mode voltage, output range, gain, and frequency response in the datasheet, and account for cable noise with appropriate filtering without degrading the intended measurement bandwidth.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour INA163UA — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | INA163UA/2K5 | INA163UA/2K5G4 | INA163UAE4 | INA166UA | INA155UA |
|---|---|---|---|---|---|---|
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Family | INA163 | INA163 | INA163 | INA163 | INA166 | INA155 |
| Amplifier Function | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier |
Principaux différenciateurs
- Direct same-family ordering alternatives preserve the INA163 function and footprint (vs INA163UA/2K5)
- Current-feedback implementation supports wide bandwidth and dynamic response (vs INA166UA)
- Low-noise and low-distortion architecture targets small-signal conditioning (vs INA155UA)
Notes de conception
Keep the differential input and feedback paths short and symmetrical, and route them away from switching regulators, relays, and high-current traces. Current-feedback instrumentation amplifiers can be sensitive to parasitic capacitance around gain-setting and feedback nodes, so follow the exact component placement shown in the Texas Instruments datasheet. Maintain a low-impedance ground reference under the device and decouple supply pins close to the package with the capacitance and ESR guidance specified by the manufacturer.
Calculate the complete gain plan before placing input filtering. The usable bandwidth, settling behavior, and noise depend on the selected gain, feedback network, source impedance, and filter components. Balanced microphone and sensor cables should use a consistent reference ground and, where practical, twisted-pair routing. Validate common-mode range and output swing across the full signal range; a low-noise amplifier still fails to deliver accurate measurements if the operating point approaches a supply or input limit.
Do not treat an INA163-family suffix as a functional difference without checking the ordering information. INA163UA/2K5, INA163UA/2K5G4, and INA163UAE4 are the strongest same-family drop-in candidates, while INA166UA and INA155UA are different families whose noise, distortion, gain, bandwidth, and common-mode limits must be compared. Before replacing a part, verify the exact pin functions, package drawing, gain-setting method, supply range, temperature rating, and qualification requirements.
Informations de conformité
The available INA166 comparison record references RoHS and REACH information for the compared products, but no explicit INA163UA compliance statement appears in the target part records. The /2K5G4 suffix is identified in the cross-reference record as a lead-free terminal-finish configuration, but broader INA163UA compliance claims are not made without explicit manufacturer documentation.