INA2137UA - Dual ±6dB Audio Receiver | Texas Instruments
部品番号: INA2137UA ✓ 生産中INA2137UA 概要
An audio differential line receiver is a specialized analog interface that converts a balanced, differential input into a single-ended audio signal. Its functional position is input conditioning: line receiver, differential receiver, analog signal conditioner, and interface IC. Differential reception is particularly useful when two conductors carry the same signal in opposite polarity, allowing common-mode noise to be rejected before the signal reaches an audio-processing or amplification stage.
Key features include low distortion of 0.0005% at 1 kHz, a slew rate of 14 V/µs, a fast settling time of 0.01%, and high common-mode rejection of 90 dB. The maximum quiescent current is 2.9 mA, while the wide ±18 V supply range supports conventional professional and consumer audio rails. Each receiver can provide a fixed gain of 1/2 or 2, corresponding to -6 dB or +6 dB.
The internal precision-resistor network provides repeatable gain without requiring external gain-setting resistors. This simplifies board design and reduces tolerance-related gain errors. High slew rate preserves large-signal dynamic range in music and speech paths, while low distortion minimizes added harmonic content. The 90 dB CMRR specification helps attenuate hum and interference picked up equally by both input conductors.
Typical applications include balanced professional-audio inputs, consumer audio equipment, active speaker systems, audio mixers, and instrumentation interfaces. The dual-channel configuration accommodates left and right channels in one package. The 14-pin SOIC also offers a practical standard footprint for through-hole assembly and conventional surface-mount production.
When designing a board around the INA2137UA, preserve the balanced input topology and keep input and return paths appropriately routed. Check output swing, input common-mode range, and gain configuration against the intended signal amplitude. Decoupling capacitors should be placed close to the supply pins, while unused inputs require appropriate treatment according to the manufacturer pin-description table.
This product overview combines the device's audio-performance figures, package information, pin and footprint considerations, replacement guidance, and application-level design guidance to support faster component evaluation and board-level implementation.
ドロップイン代替品: INA2137UA — 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: INA2137UA （同一形状・フットプリント） — 相違点: Number of Channels, Package.
INA2134UA/2K5
✅ ドロップイン📋 参考代替品（カタログ未掲載）
INA2138UA/2K5
✅ ドロップイン📋 参考代替品（カタログ未掲載）
INA2139UA/2K5
✅ ドロップイン📋 参考代替品（カタログ未掲載）
INA2137UA 最大定格＆電気的特性
| Product Type | Dual audio differential line receiver |
| Number of Channels | 2 channels |
| Gain Options | +6 dB or -6 dB |
| Gain Values | 2 V/V or 0.5 V/V |
| Supply Voltage Range | ±18 V maximum |
| Maximum Quiescent Current | 2.9 mA |
| Common-Mode Rejection Ratio | 90 dB |
| Slew Rate | 14 V/µs |
| Distortion | 0.0005% at 1 kHz |
| Settling Time | 0.01% |
| パッケージ | 14-pin SOIC (D) |
| 実装タイプ | Surface mount |
INA2137UA 14-pin soic (d) ピン配置ガイド
INA2137UA (14-pin soic (d) パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: INA2137UA.
詳細は データシート をご参照ください。
主な用途
INA2137UA の用途: 6 件s: Balanced Professional Audio Input, Active Speaker Input Stage, Audio Mixer Interface, Consumer Audio Receiver, Audio Measurement Instrumentation, Broadcast and Studio Signal Routing.
Balanced Professional Audio Input
The INA2137UA fits a balanced professional-audio input because its differential architecture provides 90 dB CMRR while maintaining 0.0005% distortion at 1 kHz. The receiver can be placed directly at the input connector, where it rejects common-mode hum before the signal enters a mixing or amplification stage. Its selectable +6 dB or -6 dB gain provides flexibility for nominal consumer, line, or instrument-level routing, provided the selected mode preserves adequate headroom. The 14 V/µs slew rate also supports high dynamic-range audio without excessive distortion.
おすすめ
Active Speaker Input Stage
The INA2137UA is appropriate for an active-speaker input stage requiring balanced rejection and two-channel handling. Place one receiver for the left channel and the other for the right channel, then feed the single-ended outputs into the speaker amplifier. The INA2137UA's fixed gain options avoid external precision gain networks, while its 90 dB CMRR helps suppress interference induced in long speaker cables. The -6 dB mode is useful when preventing clipping, whereas +6 dB adds gain when the source level is low.
おすすめ
Audio Mixer Interface
The INA2137UA can condition balanced sources entering an audio mixer or console input module. Its two receivers per package conserve board area, and the internal precision-resistor network simplifies gain implementation. The 0.0005% distortion figure at 1 kHz helps preserve signal fidelity in mixing paths, while the 90 dB CMRR reduces common-mode hum from connected equipment. The design must still account for the selected gain, maximum output swing, and the input common-mode range required by the source.
おすすめ
Consumer Audio Receiver
The INA2137UA supports consumer audio equipment that accepts balanced line signals but requires a single-ended output for downstream processing. The dual ±18 V supply capability accommodates conventional analog audio rails, and the maximum quiescent current of 2.9 mA helps limit standby-related power demand. With gain fixed at either +6 dB or -6 dB, the receiver provides predictable signal scaling without external potentiometers. Its SOIC package also suits conventional mixed-signal consumer board assembly.
おすすめ
Audio Measurement Instrumentation
The INA2137UA can be used in balanced audio measurement equipment where low distortion and common-mode rejection influence reading accuracy. Its 0.0005% distortion at 1 kHz and 90 dB CMRR help separate signal-chain errors from the source under test. The fixed-gain configuration is useful in a calibrated instrument because it limits configuration variables. For precision work, confirm the applicable frequency range of the distortion and CMRR specifications and account for the selected gain when establishing input limits.
おすすめ
Broadcast and Studio Signal Routing
The INA2137UA is well matched to studio and broadcast routing electronics that receive balanced audio over long interconnects. Its 90 dB CMRR improves rejection of shared ground hum and induced common-mode noise, while 14 V/µs slew rate supports fast transients in program material. The two independent channels simplify stereo routing, and the selectable fixed gain helps match downstream headroom. Signal-integrity results still depend on maintaining a true balanced source and using a ground reference appropriate to the equipment architecture.
おすすめ
エンジニアリング参考データ: INA2137UA — 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 | INA2134UA/2K5 | INA2138UA/2K5 | INA2139UA/2K5 |
|---|---|---|---|---|
| Package | 14-pin SOIC (D) | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Function | Dual audio differential line receiver | INA213-family audio receiver | INA213-family audio receiver | INA213-family audio receiver |
主な差別化要因
- Supports both attenuation and modest amplification in the same receiver family （vs INA2138UA/2K5)
- Provides dual balanced-audio channels in one package （vs INA2139UA/2K5)
- Combines low audio distortion with high common-mode rejection （vs INA2134UA/2K5)
設計ノート
Route each balanced input as a closely coupled differential pair and keep the input traces away from switching nodes and high-current return paths. Use the manufacturer pin-description table to identify the input and gain-control pins. Because common-mode rejection depends partly on trace symmetry, avoid long stubs, unnecessary vias, and large differences in input trace length. Maintain a continuous ground reference beneath the analog signal path where the board stackup permits.
Confirm the selected +6 dB or -6 dB mode against source level, downstream headroom, and input common-mode range before finalizing the schematic. The receiver's 90 dB CMRR is valuable for balanced audio, but it does not eliminate clipping caused by an excessive differential or common-mode input. Check peak signal amplitude and the output swing under the intended load rather than relying on nominal audio levels.
Place supply-decoupling capacitors close to the relevant supply and ground pins, and keep the return-current path short. The dual-supply arrangement requires adequate bypassing for both rails. Follow the manufacturer application diagram for capacitor selection and placement, and keep analog output routing away from digital clocks and switching-regulator nodes to minimize injected noise and crosstalk.
コンプライアンス情報
The manufacturer product page and ordering information do not provide extractable compliance declarations for this product. Verify current material and environmental declarations with the manufacturer before release.