INA126P - 36V MicroPower Precision INA | Texas Instruments
部品番号: INA126P ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.8951 | $0.90 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
INA126P 概要
An instrumentation amplifier is a differential analog-front-end IC that amplifies the voltage difference between two inputs while rejecting common-mode interference. INA126 belongs to the instrumentation-amplifier hierarchy within operational amplifiers and analog signal-chain ICs. Its two-op-amp architecture supports accurate, low-noise acquisition from sensors, bridges, and low-level transducers, especially where power consumption and input precision are important.
The verified features include 250 µV offset, 175 µA typical quiescent current, and operation from ±1.35 V to ±18 V, corresponding to a stated 36 V maximum supply condition. The INA126 family also provides programmable gains of 1, 10, 100, or 1000 through the external gain resistor. These values make it suitable for battery-powered instrumentation, industrial measurement, portable diagnostics, and sensor interfaces where common-mode rejection and low bias current are more valuable than wide bandwidth.
The device uses a two-op-amp internal architecture rather than a three-op-amp topology, helping keep power consumption low. Because the gain depends on the external resistor and its matching, PCB resistor placement, source impedance balance, input filtering, grounding, and reference-connection practices directly influence accuracy. The 8-pin PDIP package is mechanically straightforward for through-hole assembly but requires adequate lead spacing and clean soldering practice.
Typical applications include bridge-based pressure and load measurement, low-level sensor conditioning, portable medical or industrial instrumentation, battery-operated data acquisition, and differential signal acquisition where a precision offset and low supply current are required. For single-supply systems, the output-reference arrangement must be designed to keep the output within the input and output common-mode limits.
The principal design trade-off is the relatively modest micropower-focused feature set versus higher-bandwidth or lower-noise instrumentation amplifiers. Confirm supply voltage, input range, gain resistor, output swing, reference connection, and common-mode limits against the manufacturer datasheet before committing a PCB design.
This page combines verified manufacturer and distributor information with design guidance, selection criteria, and same-package comparison context for engineers evaluating the INA126P.
ドロップイン代替品: INA126P — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: INA126P （同一形状・フットプリント） — 相違点: Architecture, Mounting Type, Package, Quiescent Current.
クイック比較ツール — 並列比較する代替部品を選択:
INA126PA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
INA126U
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$5.1904 / 個
データシートを見る →INA126P
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →INA126PA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
INA126UA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
INA126P 最大定格＆電気的特性
| Product Type | Precision micropower instrumentation amplifier |
| Architecture | Two-op-amp instrumentation amplifier |
| Maximum Supply Voltage | 36 V |
| Supply Voltage Range | ±1.35 V to ±18 V |
| 静止電流 | 175 µA/channel typical |
| Input Offset Voltage | 250 µV |
| Programmable Gain | 1, 10, 100, or 1000 using external resistor |
| Differential Signal Acquisition | Precision low-noise differential input |
| Channel Count | 1 channel |
| パッケージ | 8-pin PDIP |
| Terminal Count | 8 terminals |
| 実装タイプ | Through-hole |
| Package Shape | Rectangular DIP |
| Temperature Grade | Industrial |
| Application Class | Portable instrumentation and data acquisition |
INA126P ピン構成
| ピン 1 | RG — Gain resistor connection |
| ピン 2 | IN- — Inverting differential input |
| ピン 3 | IN+ — Non-inverting differential input |
| ピン 4 | V- — Negative supply or ground connection |
| ピン 5 | RG — Gain resistor connection |
| ピン 6 | OUT — Instrumentation-amplifier output |
| ピン 7 | V+ — Positive supply connection |
| ピン 8 | REF — Output reference input |
主な用途
INA126P の用途: 6 件s: Bridge-Based Pressure Measurement, Portable Battery-Powered Instrumentation, Industrial Sensor Signal Conditioning, Portable Diagnostic Measurement, Battery-Powered Data Acquisition, Low-Level Differential Signal Acquisition.
Bridge-Based Pressure Measurement
The INA126P is suited to low-level bridge excitation outputs because it is designed for accurate differential-signal acquisition and offers gains of 1, 10, 100, or 1000 through an external resistor. Place the bridge output across the two differential inputs and keep the input traces short and balanced. The 250 µV input offset is relevant when bridge millivolt-level signals are amplified for an ADC, while the 175 µA typical quiescent current helps limit static consumption. Verify bridge excitation voltage, common-mode limits, input bias effects, and output swing in the complete analog chain.
おすすめ
Portable Battery-Powered Instrumentation
The INA126P is a strong fit for portable instrumentation because the verified family specification is 175 µA typical quiescent current per channel, with operation from ±1.35 V to ±18 V. Its precision differential input can amplify sensor signals without requiring a high-power instrumentation stage. A battery design should still account for regulator quiescent current, sensor draw, display load, and duty cycle. Use a low-noise reference and controlled gain resistor when the measurement resolution depends on stable scale factor.
おすすめ
Industrial Sensor Signal Conditioning
The INA126P can condition low-level industrial sensor outputs when the application needs a precision instrumentation front end and differential rejection. The two-op-amp architecture, programmable gains, and 250 µV offset specification support measurements from resistive or ratiometric sensors. Keep the input pair balanced, provide filtering at the connector, and check the sensor's common-mode voltage before increasing gain. Industrial designs should also assess surge protection, grounding, shielding, and calibration stability according to the installation environment.
おすすめ
Portable Diagnostic Measurement
The INA126P is appropriate for portable diagnostic equipment that measures small differential physiological or sensor signals while keeping supply demand modest. Its precision input stage can reduce the need for a higher-power analog front end, although actual safety and compliance requirements depend on the complete medical system. The output reference must be selected to keep the signal within the amplifier's allowable output range on a single supply. Validate input protection, isolation strategy, leakage current, and application-specific standards before clinical use.
おすすめ
Battery-Powered Data Acquisition
The INA126P supports battery-powered data acquisition when each channel must amplify a differential signal at low quiescent current. The verified 36 V maximum supply and ±1.35 V to ±18 V operating range provide flexibility around regulated rails, while external gain selection lets the designer match amplification to the sensor range. A practical DAQ should define sensor excitation, anti-alias filtering, reference voltage, and ADC input range together. The INA126P does not replace the ADC or sensor excitation regulator; it is the analog input-conditioning stage.
おすすめ
Low-Level Differential Signal Acquisition
The INA126P is intended for low-level differential signal acquisition where common-mode voltage and offset errors can obscure the wanted measurement. Its 250 µV input offset specification, low-noise instrumentation-amplifier architecture, and selectable gains make it suitable for sensor outputs and precision analog front ends. Use symmetrical input routing, a stable gain resistor, and a defined reference connection to reduce scale and output errors. Confirm the complete signal chain against the manufacturer datasheet before selecting the final gain and bandwidth.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: INA126P — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | INA126PA | INA126U | INA126P | INA126PA | INA126UA |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Precision micropower instrumentation amplifier | INA126-family instrumentation amplifier | INA126-family instrumentation amplifier | Precision micropower instrumentation amplifier | INA126-family instrumentation amplifier | INA126-family instrumentation amplifier |
主な差別化要因
- Micropower precision signal acquisition （vs INA126UA)
- Through-hole 8-pin PDIP configuration （vs INA126UA)
- Precision offset target （vs AD623ANZ)
設計ノート
The INA126P's 175 µA typical quiescent current is the device baseline, not the complete system current. Estimate total current from the sensor, gain resistor path, reference network, ADC, regulator, and any indicator or interface circuitry. On a battery-powered design, verify the regulator's own quiescent current and the sensor's load over the full measurement cycle before selecting battery capacity.
Route the differential input pair together and keep both traces short, symmetric, and away from switching nodes and high-current return paths. Place the external gain resistor and associated filtering close to the INA126P pins, following the datasheet layout guidance. A ground-plane connection should be deliberate; do not route sensitive input returns through noisy regulator or converter currents.
The INA126P is a precision instrumentation amplifier, but system accuracy still depends on reference placement, gain-resistor tolerance, input common-mode range, and output swing. On a single-supply design, a mid-supply reference is often useful, but it must be established only after checking the actual sensor range and the amplifier's allowed output voltage. Also avoid treating AD623ANZ as a drop-in replacement without verified pin and package mapping.
For low-level sensor signals, place filtering at the connector or input side and use matched or closely controlled passive values so the differential signal remains balanced. Check whether added input networks alter input bias current, common-mode rejection, or settling behavior. After layout changes, validate gain, offset, noise, and common-mode performance with the final sensor and reference network rather than evaluating the IC alone.
コンプライアンス情報
The supplied verified data confirms the manufacturer, product specifications, package information, distributor presence, and one reported LCSC price, but does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.