TS974IN - 4-Channel Low-Noise Rail-to-Rail Op Amp | STMicroelectronics
MPN： TS974IN ✓ 啟用中TS974IN 概覽
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its non-inverting and inverting inputs. Within the amplifier hierarchy, the TS974IN is a general-purpose precision operational amplifier and a member of the rail-to-rail low-noise amplifier family. Rail-to-rail input and output operation allows the signal to approach the supply rails, improving usable dynamic range in low-voltage and single-supply systems.
The TS974IN provides four amplifier channels in one package, reducing board area and simplifying multi-channel signal-conditioning layouts. Its 4 nV/Hz noise density supports high-resolution analog measurement, while the 12 MHz gain-bandwidth product and 4 V/us slew rate preserve signal fidelity in faster signal paths. The listed ultra-low distortion of 0.003% makes the device suitable for audio preamplification, filtering, buffering, and instrumentation.
The device operates over a supply range extending to 10 V and includes ESD protection rated at 2 kV. The listed latch-up immunity is Class A. Each amplifier is configured as a standard voltage-feedback operational amplifier, allowing the same component to implement inverting, non-inverting, summing, comparator-style, and active-filter circuits. Operating and electrical limits should always be confirmed in the manufacturer datasheet.
Typical uses include four-channel audio preamplification, sensor signal conditioning, active audio filters, low-level instrumentation, data acquisition front ends, and general-purpose analog buffering. Because all four channels share one package, matching and thermal tracking are convenient when several related analog signals are processed under similar conditions.
For low-noise layouts, keep the input and feedback resistors short, place input compensation and decoupling capacitors close to the relevant pins, and avoid routing high-impedance input traces beside digital clock or switching nodes. Select the bypass capacitance and compensation values with the datasheet's stability and noise guidance in mind, particularly when driving capacitive loads.
This page combines the verified TS974IN product characteristics with application guidance, drop-in replacement analysis, and engineering design notes. It is intended to help designers evaluate the TS974IN quickly while completing the mandatory signal-integrity, noise, and stability checks against the full manufacturer documentation.
直接替換替代品，適用於 TS974IN — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TS974IN （相同外形與佔位） — 差異在於 Amplifier Type, Mounting Type, Package, Slew Rate, Voltage Noise Density.
TS974IN 最大額定值與電氣特性
| Number of Amplifiers | 4 circuits |
| Amplifier Type | General-purpose operational amplifier |
| 拓撲 | Rail-to-rail output |
| Voltage Noise Density | 4 nV/Hz |
| Total Harmonic Distortion | 0.003% |
| Gain-Bandwidth Product | 12 MHz |
| Slew Rate | 4 V/us |
| Maximum Supply Voltage | 10 V |
| ESD Protection | 2 kV |
| Latch-Up Immunity | Class A |
| 封裝 | 14-DIP (0.300 inch, 7.62 mm pitch) |
| 安裝類型 | Through-hole |
TS974IN 14-dip (0.300 inch, 7.62 mm pitch) 腳位配置指南
TS974IN（14-dip (0.300 inch, 7.62 mm pitch) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： TS974IN.
請參閱 資料表 以查看完整腳位配置。
典型應用
TS974IN 適用於 6 應用s: Low-Noise Audio Preamplifier, Active Audio Filter Bank, Sensor Signal Conditioning, Data Acquisition Front End, Precision Instrumentation Buffer, Voltage Reference and Bridge Conditioning.
Low-Noise Audio Preamplifier
The TS974IN fits four-channel audio preamplification because its 4 nV/Hz voltage noise density and 0.003% distortion preserve small signals through the input stage. Each of the four amplifiers can condition a separate mono or balanced channel while operating from the same supply. Use the rail-to-rail output swing to maximize headroom in a single-supply design, and keep the feedback network short to prevent added board noise and phase delay. Verify the required input common-mode range and output drive against the datasheet before fixing the gain resistors.
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Active Audio Filter Bank
The TS974IN is suitable for a four-channel active filter bank where low noise and high closed-loop bandwidth are both important. Its 12 MHz gain-bandwidth product gives practical headroom for filters set to audible and ultrasonic bands, while the 4 V/us slew rate helps preserve low distortion at larger signal amplitudes. Implement equalizer, crossover, or shelf stages around the four independent channels. Place filter and feedback components close to the device and follow the datasheet stability guidance for capacitive loading and noise measurement bandwidth.
推薦
Sensor Signal Conditioning
The TS974IN can condition four low-level sensor outputs where the amplifier's 4 nV/Hz noise density helps preserve small-signal information. Place each sensor signal through a high-impedance input stage, then use the other channels for gain, offset correction, filtering, and buffering. The 12 MHz gain-bandwidth product supports both slow industrial sensors and faster measurement signals. Compensation-network selection should match the sensor capacitance, and guarding techniques should be used when high-impedance traces are long.
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Data Acquisition Front End
The TS974IN works well as a four-channel data-acquisition front end that buffers or amplifies inputs before conversion. Its four independent circuits can handle separate sensor lines while maintaining consistent bias and operating conditions across the channels. The 4 V/us slew rate allows the amplifier to follow higher-amplitude or higher-frequency signals better than a slow precision-only amplifier. Use the manufacturer's compensation recommendations, keep input nodes short, and establish an anti-alias filter before the sampling stage.
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Precision Instrumentation Buffer
The TS974IN is useful for precision instrumentation buffers that must handle four inputs with low added noise. Its 4 nV/Hz noise density and 0.003% distortion are beneficial when the measured signal is small relative to the instrument's full-scale output. The amplifier can provide unity-gain buffering or moderate inverting and non-inverting gain around each channel. Validate input offset, bias-current error, and common-mode behavior against the actual source impedance because those parameters establish the practical accuracy of the complete chain.
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Voltage Reference and Bridge Conditioning
The TS974IN can amplify the differential output of resistive bridge sensors and monitor several related voltage signals. Its rail-to-rail output operation helps maximize usable signal range in low-voltage systems, while the low noise density limits added error in the bridge amplifier. Use the four channels for two differential bridge measurements or for bridge excitation monitoring plus auxiliary channels. Follow the datasheet input bias, common-mode range, and noise specifications, and use matched resistors when channel-to-channel accuracy is important.
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推薦產品摘要
工程參考資料，適用於 TS974IN — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TS974 |
|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics |
| Package | 14-DIP (0.300 inch, 7.62 mm pitch) | 14-DIP (0.300 inch, 7.62 mm pitch) |
| Number of Amplifiers | 4 circuits | 4 circuits |
| Voltage Noise Density | 4 nV/Hz | 4 nV/Hz |
| Gain-Bandwidth Product | 12 MHz | 12 MHz |
| Slew Rate | 4 V/us | 4 V/us |
| Total Harmonic Distortion | 0.003% | 0.003% |
| Maximum Supply Voltage | 10 V | 10 V |
| ESD Protection | 2 kV | 2 kV |
主要差異化特點
- Four low-noise amplifier channels in one through-hole package (對比TLV2402ID)
- Higher listed slew rate for fast large-signal transitions (對比NE5534PSR)
- Rail-to-rail output operation with very low noise density (對比TLV2402ID)
設計說明
Route each non-inverting input directly to its source with a short trace and minimal area. High-impedance input nodes are sensitive to capacitive pickup, so avoid placing them beside digital clock lines, switching-regulator nodes, or relay contacts. Keep the feedback components adjacent to the relevant amplifier pins and place the manufacturer's recommended compensation capacitor directly at the output or input node. These steps reduce added noise and parasitic feedback that can otherwise mask the TS974IN's 4 nV/Hz noise density.
Treat 4 V/us as the large-signal limit when evaluating fast waveforms. The estimated full-scale swing rate at a 1 V output change is 0.25 us, calculated as 1 V divided by 4 V/us. When driving capacitive loads, follow the manufacturer stability guidance rather than adding large capacitors directly at the output. Isolation resistors or an additional buffer can reduce oscillation risk, but they must be included in the stability simulation and signal-budget analysis.
Do not assume rail-to-rail output operation guarantees an unrestricted rail-to-rail input common-mode range. Verify the input range, supply limits, offset voltage, bias current, and output-current capability against the manufacturer datasheet before finalizing the schematic. Also avoid selecting feedback resistors solely for their nominal value; resistor Johnson noise, source impedance, and the 4 nV/Hz amplifier noise all contribute to the total input-referred noise density.
合規資訊
The manufacturer datasheet listing confirms a 10 V maximum operating range, 2 kV ESD protection, and Class A latch-up immunity. RoHS, REACH, halogen-free, conflict-minerals, and automotive qualification status require confirmation from the current manufacturer declaration or product documentation.
