INA2134PA - Dual 0dB Audio Differential Receiver | Texas Instruments
料号： INA2134PA ✓ 量产中INA2134PA 概述
An audio differential line receiver is a specialized amplifier stage that rejects common-mode noise present on balanced signal pairs while preserving the wanted differential audio voltage. Its place in the signal-chain hierarchy is differential receiver → balanced audio input amplifier → analog signal-conditioning front end. This makes the INA2134PA particularly useful when a stereo source uses balanced left and right channels but the downstream circuitry requires ground-referenced, single-ended audio signals.
Key performance characteristics include a fixed 0 dB voltage gain, 90 dB minimum CMRR, 2.9 mA maximum quiescent current, and operation from -18 V to +18 V. According to the TI INA134 and INA2134 datasheet, the receiver combines low distortion with fast settling and wide output-voltage swing. The 14 V/µs slew rate supports accurate reproduction of high-level, high-frequency transients rather than clipping them under moderate loading.
The INA2134PA contains two independent receiver channels and internal precision gain-setting resistors. On-chip resistors reduce component count and help maintain consistent channel-to-channel gain without requiring external matched networks. Its differential architecture is useful for rejecting ground-potential differences and coupled interference present between a source and the receiving equipment, especially in professional audio, instrumentation, and industrial control systems.
Typical uses include stereo balanced-to-unbalanced conversion, audio measurement front ends, line-level signal conditioning, and instrumentation amplifiers. Because the gain is fixed at 1 V/V, downstream stages must provide any required attenuation or additional amplification. The device is also appropriate for prototypes, repairs, and legacy equipment where a standard 14-pin PDIP footprint and through-hole assembly are preferred over a surface-mount package.
When laying out the receiver, connect the balanced input conductors to their assigned differential inputs and route the outputs to the following analog stage with short traces and a stable ground reference. Decouple each supply rail close to the device, keep input and output nodes away from switching-current paths, and verify the output swing against the selected load. This page also organizes package, electrical, and replacement information for faster component selection.
直接替换替代料： INA2134PA ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
INA2134PA 最大额定值与电气特性
| Number of Channels | 2 channels |
| Voltage Gain | 1 V/V (0 dB) |
| Architecture | Dual audio differential line receiver |
| Supply Voltage Range | -18 V to +18 V |
| 静态电流 | 2.9 mA maximum |
| Common-Mode Rejection Ratio | 90 dB minimum |
| Total Harmonic Distortion + Noise | 0.0005% at 1 kHz |
| Slew Rate | 14 V/µs |
| Gain Resistors | On-chip precision resistors |
| 工作温度范围 | -40 °C to +85 °C |
| Package Type | PDIP (N), 14 pins |
| 安装类型 | Through-hole |
INA2134PA pdip (n), 14 pins 引脚配置指南
INA2134PA（pdip (n), 14 pins 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： INA2134PA.
请参阅 数据手册 以查看完整引脚配置。
典型应用
INA2134PA 适用于 6 应用s: Stereo Balanced-to-Unbalanced Audio Conversion, Professional Audio Input Conditioning, Audio Test and Measurement Front End, Industrial Instrumentation Signal Conditioning, Broadcast and Studio Interface Electronics, Balanced Sensor and Low-Level Signal Inputs.
Stereo Balanced-to-Unbalanced Audio Conversion
The INA2134PA fits directly between a balanced stereo source and an unbalanced audio processing stage. Its two channels provide fixed 1 V/V differential gain while the 90 dB minimum CMRR suppresses common-mode voltage present on both input conductors. The 0.0005% distortion at 1 kHz and 14 V/µs slew rate preserve low-level musical detail and reduce the risk of output clipping during transients.
推荐
Professional Audio Input Conditioning
Use the INA2134PA in a professional mixing console, line-level interface, or monitor controller that accepts balanced analog audio. Because the gain is fixed at 1 V/V, the receiver changes the signal format without adding level gain. Its ±18 V supply capability supports generous headroom, while the dual-channel architecture preserves matched behavior across left and right signal paths.
推荐
Audio Test and Measurement Front End
The INA2134PA can serve as the differential input stage of an audio analyzer, oscilloscope interface, or precision measurement system. The high CMRR helps isolate a small differential test signal from common-mode noise on the source leads, while the fixed unity gain keeps amplitude relationships traceable. Its low distortion at 1 kHz and fast slew rate suit measurements involving accurate waveform reproduction.
推荐
Industrial Instrumentation Signal Conditioning
The INA2134PA is appropriate for low-level differential instrumentation signals that arrive over cable runs exposed to ground-potential differences. Its 90 dB minimum CMRR improves rejection of shared interference, and the 2.9 mA maximum quiescent current supports power-constrained analog modules. The ±18 V supply range and low 1 kHz distortion accommodate industrial signal-acquisition and process-control front ends.
推荐
Broadcast and Studio Interface Electronics
The INA2134PA suits legacy broadcast consoles, studio monitor electronics, and custom interface boards that rely on a standard through-hole footprint. Two integrated receiver channels reduce the component count for stereo link conversion, while the integrated precision resistors simplify board assembly. Its 14-lead PDIP package is also convenient for repair and retrofit work on older equipment.
推荐
Balanced Sensor and Low-Level Signal Inputs
Although designed for audio, the INA2134PA also supports precision differential sensing where the required bandwidth and amplitude remain within its specifications. The fixed 1 V/V gain preserves the differential input amplitude, and the high CMRR improves rejection of shared noise. Verify the common-mode input range, output swing, and load impedance in the TI datasheet before adapting the receiver to non-audio signals.
推荐
推荐产品汇总
工程参考数据： INA2134PA ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | INA2137PA |
|---|---|---|
| Package | PDIP (N), 14 pins | PDIP (N), 14 pins |
| Brand | Texas Instruments | Texas Instruments |
| Number of Channels | 2 channels | 2 channels |
| Gain | 1 V/V fixed (0 dB) | Selectable gain; differs from fixed 1 V/V |
| CMRR | 90 dB minimum | 74 dB minimum |
| THD + Noise at 1 kHz | 0.0005% | 0.0005% |
| Mounting Type | Through-hole | Through-hole |
关键差异点
- Fixed unity-gain stereo input format conversion （对比 INA2137PA)
- Higher common-mode rejection （对比 INA2137PA)
- Through-hole package for service and prototype assembly （对比 INA2134MDREP)
设计说明
Decouple both supply rails at the device with the capacitor network specified by TI. Keep the positive and negative decoupling loops compact so that supply-current transients do not share a long path with the differential input returns. Because the circuit can operate with bipolar supplies up to ±18 V, confirm the actual rail voltages and grounding scheme before energizing the board.
Route each balanced input pair together and connect the internal precision resistor inputs directly to their assigned pins. Avoid routing input conductors adjacent to switching-node or high-current return paths. Short output traces and a continuous ground plane reduce parasitic pickup and help preserve the receiver's common-mode rejection and low-distortion performance.
Check output-voltage headroom into the actual next-stage load before fixing the system gain. The 0 dB input stage does not provide attenuation, so a high-level source can still overload the following amplifier. Where level adjustment is needed, place a calibrated attenuator or gain-control stage after the receiver and verify the resulting noise contribution.
Do not treat the INA2134UA or INA2134MDREP as PCB drop-in replacements for the 14-pin PDIP INA2134PA; those related options use surface-mount packages. Likewise, changing to the INA2137PA can alter system gain even though it retains a similar receiver architecture. Confirm the physical footprint, gain setting, common-mode limits, and output swing for every redesign.
合规信息
The manufacturer identifies the INA2134PA as an industrial-temperature audio receiver in a 14-pin PDIP package. Explicit RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations were not identified for this orderable part.
