TS972IN - Dual Low-Noise R2R Op Amp | STMicroelectronics
料号： TS972IN ✗ 停产TS972IN 概述
An operational amplifier is an analog semiconductor that amplifies the voltage difference between its two inputs while using negative feedback to establish gain and bandwidth. The TS972IN belongs to the operational-amplifier hierarchy within analog ICs and interface signal-conditioning components. Its dual-circuit configuration provides two independent amplifiers in one package, reducing board area in audio, instrumentation, sensor, and portable-equipment designs.
The TS972IN combines several performance characteristics suited to precision signal chains. Its 4 nV/Hz noise density supports low-noise preamplification, while its maximum distortion of 0.003% is useful in audio and measurement paths. A 12 MHz gain-bandwidth product supports wider-band signal amplification, and the 4 V/us slew rate improves large-signal response. Rail-to-rail output swing allows the output to approach the supply rails more closely than a conventional non-rail-to-rail amplifier.
The TS97x family supports operation from voltages as low as ±1.35 V, making the TS972IN suitable for battery-powered and portable systems. Its specified operating range extends to 10 V. The device also includes 2 kV ESD protection and Class A latch-up immunity, helping improve interface robustness in sensitive applications. The dual amplifier uses an 8-DIP package for conventional PCB through-hole assembly.
Typical uses include audio preamplification, portable instrumentation, low-level sensor conditioning, active filtering, and general-purpose analog signal conditioning. Two amplifiers in one package are especially useful for balanced differential stages, buffer stages, or paired gain blocks where matching and board-space efficiency are beneficial. Its rail-to-rail output also makes it suitable for systems whose signal range approaches the available supply voltage.
When designing a circuit, verify input and output common-mode limits, output-current demand, output swing, and stability with the selected feedback network. Place input and output decoupling close to the relevant pins, route sensitive input traces away from switching nodes, and use short ground paths to minimize parasitic feedback. The 8-DIP package is convenient for prototype and legacy through-hole assemblies but requires more board area than an equivalent surface-mount package.
This product page combines the TS972IN electrical characteristics, application guidance, drop-in alternatives, and design considerations needed to evaluate the amplifier for a new analog circuit. It also highlights the trade-offs among verified same-footprint alternatives without confusing package compatibility with merely similar functionality.
直接替换替代料： TS972IN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TS972IN （相同外形与封装尺寸） ——差异在于 Amplifier Type, Mounting Type, Package.
TS972IN 最大额定值与电气特性
| Amplifier Type | General-purpose operational amplifier |
| Number of Circuits | 2 circuits |
| Output Swing | Rail-to-rail |
| 噪声密度 | 4 nV/Hz |
| Maximum Distortion | 0.003% |
| Gain-Bandwidth Product | 12 MHz |
| Slew Rate | 4 V/us |
| Minimum Total Supply Voltage | 2.7 V (±1.35 V) |
| Maximum Operating Supply Voltage | 10 V |
| 电源电流 | 2 mA per channel |
| Output Current | 100 mA typical |
| ESD Protection | 2 kV |
| Latch-Up Immunity | Class A |
| 工作温度范围 | -40°C to 125°C |
| 封装 | 8-DIP, 7.62 mm pin spacing |
| 安装类型 | Through-hole |
| Shipping Package | Tube |
TS972IN tube 引脚配置指南
TS972IN（tube 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： TS972IN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TS972IN 适用于 6 应用s: Low-Noise Audio Preamplifier, Portable Sensor Signal Conditioning, Precision Active Filtering, Battery-Powered Instrumentation, Industrial Control and Monitoring, General-Purpose Analog Buffering.
Low-Noise Audio Preamplifier
The TS972IN fits low-noise audio preamplification because its 4 nV/Hz noise density limits the amplifier's contribution to the input signal noise floor. Its maximum distortion of 0.003% and 4 V/us slew rate support clean reproduction of moderate-amplitude audio waveforms, while the 12 MHz gain-bandwidth product provides useful bandwidth for active filtering and equalization stages. Two amplifiers in one 8-DIP package can implement a balanced or dual-channel preamp. The rail-to-rail output allows more of the available supply span to be used when operating from low-voltage supplies.
Portable Sensor Signal Conditioning
The TS972IN is appropriate for conditioning signals from low-level sensors in portable equipment because the TS97x family operates from total supplies as low as 2.7 V, or ±1.35 V. Its typical supply current of 2 mA per channel helps limit power consumption, while 4 nV/Hz noise is valuable when the sensor output is small. The dual configuration can amplify or buffer two related channels, such as a differential sensor pair. Rail-to-rail output helps maximize usable signal range, but designers should verify the input common-mode range and output swing at the selected supply voltage.
Precision Active Filtering
The TS972IN can serve as an active-filter building block in low-noise measurement and control systems. Its 12 MHz gain-bandwidth product supplies ample closed-loop bandwidth for moderate-gain filter sections, while the 4 V/us slew rate improves large-signal behavior. The 4 nV/Hz noise density is especially useful in filters handling microphone, sensor, or instrumentation outputs where added amplifier noise affects the measurement result. Two independent amplifiers allow paired filter sections to share one package. Stable feedback-network component selection and careful grounding remain essential for accurate cutoff and gain characteristics.
Battery-Powered Instrumentation
The TS972IN supports battery-powered instrumentation because the device operates from a minimum total supply of 2.7 V and consumes a typical 2 mA per channel. Its rail-to-rail output improves usable signal swing in compact systems where every volt matters, and its 100 mA typical output current supports a range of buffering duties. The low 4 nV/Hz noise density helps preserve small measurement signals without adding a higher-noise amplification stage. For long acquisition windows, verify supply-current behavior across the full temperature range and confirm that the selected load does not cause unacceptable output distortion.
Industrial Control and Monitoring
The TS972IN can condition control and monitoring signals in industrial equipment where rail-to-rail output operation and low noise are useful. Its 12 MHz bandwidth supports signals well beyond slow process-control loops, while 4 nV/Hz noise can improve the fidelity of low-level measurements. The -40°C to 125°C operating range covers many industrial environments, and 2 kV ESD protection adds interface robustness. The 8-DIP through-hole package is particularly convenient for legacy control boards, repair assemblies, and prototype systems where surface-mount rework is undesirable.
General-Purpose Analog Buffering
The TS972IN is practical as a general-purpose rail-to-rail buffer when a source impedance or load would otherwise degrade the signal path. The dual-circuit package provides two buffers in one 8-DIP, reducing component count in instrumentation and interface designs. A 12 MHz gain-bandwidth product supports moderate closed-loop bandwidth, while the 4 V/us slew rate helps the output follow changing signals. Designers should use the amplifier in its specified operating region, preserve adequate output margin, and place bypass capacitance close to the supply pins to limit supply-borne disturbance.
工程参考数据： TS972IN ——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 | TS972 | TS972I |
|---|---|---|---|
| Package | 8-DIP | 8-DIP | 8-DIP |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Number of Amplifiers | 2 circuits | 2 circuits | 2 circuits |
| Output Swing | Rail-to-rail | Rail-to-rail | Rail-to-rail |
| Noise Density | 4 nV/Hz | 4 nV/Hz | 4 nV/Hz |
| Gain-Bandwidth Product | 12 MHz | 12 MHz | 12 MHz |
| Slew Rate | 4 V/us | 4 V/us | 4 V/us |
| Minimum Total Supply Voltage | 2.7 V | 2.7 V | 2.7 V |
| ESD Protection | 2 kV | 2 kV | 2 kV |
关键差异点
- Combines two low-noise amplifiers in one through-hole package （对比 TS972)
- Provides 12 MHz bandwidth and 4 V/us slew rate in a dual amplifier （对比 TS972I)
- Supports low-voltage portable operation （对比 TS972)
设计说明
Place the supply bypass capacitor immediately adjacent to the amplifier's supply and ground pins. Keep the input and feedback traces short, and route them away from high-current switching nodes and digital clock lines. For the TS972IN's 4 nV/Hz noise performance, PCB leakage and grounding can become relevant at very high source impedances, so use a suitable grounding topology and avoid long, high-impedance input routes.
Do not treat rail-to-rail output as unlimited output range. Verify output swing under the actual load, supply voltage, output current, and temperature, and preserve the voltage headroom required by the connected circuit. Likewise, confirm that each input remains inside the common-mode range. The TS972IN can operate from 2.7 V total supply, but correct low-voltage operation also depends on the selected gain and feedback network.
Choose feedback resistors and capacitors for stability and the intended closed-loop bandwidth rather than relying only on the 12 MHz gain-bandwidth product. Keep the feedback loop compact and symmetric where practical, and account for stray capacitance in high-gain or precision-filter configurations. The 4 V/us slew rate supports large-signal response, but output-current demand and capacitive loading must still be checked before driving heavy or nonlinear loads.
合规信息
The available product information does not provide explicit compliance declarations for the TS972IN. These fields remain unknown rather than being inferred.
