TS524IN - Quad Low-Noise Precision Op Amp | STMicroelectronics
MPN： TS524IN ✓ 啟用中TS524IN 概覽
An operational amplifier is an analog integrated circuit that uses high-gain differential amplification to improve signals applied to its two inputs. The TS524 belongs to the broader hierarchy of operational amplifier, instrumentation amplifier, analog amplifier, and semiconductor. Its four-channel configuration reduces the number of packages required in stereo, surround-sound, mixer, and other multi-channel audio signal paths while preserving consistent performance across each amplifier.
Key characteristics include very low input-offset voltage, 4.5 nV/sqrt(Hz) voltage-noise density, 80 dB gain bandwidth or signal-to-noise performance identified for the device, 250 nA input-bias current, and 0.8 uA input-bias current figure listed for the family. The 37 mA per-channel current rating reflects the operating conditions associated with the amplifier family. These characteristics make the TS524 useful where microphone signals, line-level audio, or control signals require low-noise amplification and wide bandwidth.
The TS524 combines four precision operational amplifiers in one monolithic IC. Its 15 MHz gain-bandwidth product supports moderate-gain audio stages, while the 7 V/us slew rate improves large-signal response compared with slower general-purpose amplifiers. The low 4.5 nV/sqrt(Hz) input noise helps preserve quiet signal chains, and the low input-bias current reduces errors when operating with high-impedance sources. Its stated supply range accommodates both positive single-supply operation and dual-supply audio systems.
Typical uses include stereo preamplifiers, audio mixer stages, active crossover networks, microphone preamplifiers, headphone-driver signal chains, and four-channel surround-sound processing. In each case, the quad arrangement can simplify routing between channels and conserve board area, although independent de-coupling and careful grounding remain necessary when multiple amplifiers share one package.
PCB design should keep input and feedback paths short, connect a suitable bypass capacitor near each supply pin, and maintain a quiet return-current path. Decoupling between amplifier channels can reduce interaction through the shared supply network. Designers should also verify output swing, load capability, stability with the selected feedback network, and thermal behavior against the intended supply voltage and signal level before releasing the layout.
This product record combines the TS524 family specifications with package details, application guidance, selection criteria, and practical design notes. It helps engineers distinguish the 14-pin DIP TS524IN from differently packaged family members while focusing attention on the measured electrical characteristics that matter in low-noise audio circuitry.
直接替換替代品，適用於 TS524IN — 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： TS524IN （相同外形與佔位） — 差異在於 Mounting Type, Package, Slew Rate.
此產品無可直接替換的替代品。
申請替代品TS524IN 最大額定值與電氣特性
| Amplifier Type | Quad general-purpose operational amplifier |
| Number of Channels | 4 circuits |
| Gain-Bandwidth Product | 15 MHz |
| Slew Rate | 7 V/us |
| Input Voltage Noise Density | 4.5 nV/sqrt(Hz) |
| Input Bias Current | 250 nA |
| Low Input Bias Current | 0.8 uA |
| Signal-to-Noise Performance | 80 dB |
| Supply Voltage Range | 5 V to 30 V |
| Maximum Supply Voltage | 15 V |
| 輸出電壓範圍 | plus or minus 2.5 V to plus or minus 15 V |
| 供應電流 | 37 mA per channel |
| 封裝 | 14-DIP, 7.62 mm row spacing |
| 安裝類型 | Through-hole |
| Primary Application | Low-noise audio amplification |
TS524IN 14-dip, 7.62 mm row spacing 腳位配置指南
TS524IN（14-dip, 7.62 mm row spacing 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： TS524IN.
請參閱 資料表 以查看完整腳位配置。
典型應用
TS524IN 適用於 6 應用s: Stereo Audio Preamplifier, Microphone Preamplifier, Audio Mixer Signal Path, Active Crossover Network, Headphone Signal Driver, Broadcast and Studio Monitoring.
Stereo Audio Preamplifier
The TS524IN is appropriate for two-channel line-level preamplification because it provides four precision amplifiers, 4.5 nV/sqrt(Hz) input-voltage-noise density, and a 15 MHz gain-bandwidth product in one 14-DIP package. Two channels can form the left and right preamplifier paths while the remaining channels support gain-control, monitoring, or auxiliary functions. The 7 V/us slew rate provides useful large-signal capability for audio, but the chosen feedback network must maintain stability. Keep input and feedback traces short, decouple the supply pins locally, and verify output swing against the selected dual- or single-supply operating point.
推薦
Microphone Preamplifier
The TS524IN can amplify low-level microphone signals where input noise and bias-current behavior are important. Its 4.5 nV/sqrt(Hz) input-noise density is particularly useful when the preceding stage must preserve a quiet signal floor, while the identified 250 nA and 0.8 uA bias-current figures support source-dependent design evaluation. A practical microphone stage should use short input routing, a shielded connection, carefully selected input-bias resistors, and supply bypassing near the IC. The designer must also confirm that the source impedance, gain, and capacitive cable loading do not compromise stability.
推薦
Audio Mixer Signal Path
Four amplifiers in the TS524IN package suit compact audio mixer boards that process several balanced or unbalanced channels. The 15 MHz gain-bandwidth product provides bandwidth above the audible range, while the 7 V/us slew rate helps the amplifier follow larger transient signals without excessive distortion. Each mixer channel should use an appropriate gain-setting network and input attenuation or filtering as required by the source. Route high-impedance summing nodes conservatively, isolate channels from each other, and use local decoupling to prevent shared-supply current from coupling modulation or switching noise into the quiet input stages.
推薦
Active Crossover Network
The TS524IN is suitable for active crossover and equalization stages that need multiple gain-bandwidth and low-noise channels in a compact package. Its 15 MHz bandwidth gives ample frequency range for crossover filters and audio EQ, while the 7 V/us slew rate supports clean output into practical line-level loads. Place the filter resistors and capacitors close to the relevant input, feedback, and output pins to minimize parasitic effects. Confirm each filter's stability with the intended source and load impedances, and verify that the package supply current remains compatible with the available regulator and thermal design.
推薦
Headphone Signal Driver
The TS524IN can form the voltage-drive stage of a headphone output when the selected headphone impedance and signal level remain within the device's output-swing and load limits. Its 4.5 nV/sqrt(Hz) input noise supports a quiet driver chain, and the 7 V/us slew rate helps maintain transient response. A passive damping network may be required to control ringing with cable capacitance. Keep the output route compact, provide stable feedback, and test the completed design across headphone impedances because output-current limits, thermal behavior, and distortion must all be evaluated at the intended load.
推薦
Broadcast and Studio Monitoring
The TS524IN fits low-noise monitoring paths that require multiple amplifier channels in a single through-hole package. Its low 4.5 nV/sqrt(Hz) input-noise density, 15 MHz gain-bandwidth product, and 7 V/us slew rate are useful for line-level conditioning before an audio converter or monitor input. The four channels can monitor left, right, and auxiliary sources or provide balanced output stages when the circuit topology supports it. Maintain a clean analog ground reference, avoid sharing high-current return paths with input returns, and verify common-mode range and output swing for the selected balanced signaling standard.
推薦
推薦產品摘要
工程參考資料，適用於 TS524IN — 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 |
|---|---|
| Package | 14-DIP |
| Brand | STMicroelectronics |
| Amplifier Channels | 4 circuits |
| Gain-Bandwidth Product | 15 MHz |
| Slew Rate | 7 V/us |
| Input Voltage Noise Density | 4.5 nV/sqrt(Hz) |
| Supply Voltage Range | 5 V to 30 V |
| Output Voltage Range | plus or minus 2.5 V to plus or minus 15 V |
| Primary Application | Low-noise audio amplification |
主要差異化特點
- Four audio-optimized amplifiers in one DIP package (對比TS524IDT)
- Low-noise performance for audio signal chains (對比TS524IDT)
- Broad bandwidth for practical audio stages (對比TS524IDT)
設計說明
Route each amplifier's non-inverting input, inverting input, and feedback components close to the corresponding TS524IN pins. Keep the 14-DIP footprint free of unintended ground-plane voids where possible, and keep high-current output returns separate from sensitive input references. Because all four channels share one package, power-supply and ground-current coupling can affect otherwise independent stages. Review the completed layout for loops, shared return paths, and traces passing beside output and supply connections.
Use the manufacturer's recommended bypass capacitance at the supply pins with short traces and a low-impedance connection to the circuit ground. Estimated: four channels operating at the listed 37 mA per channel require approximately 148 mA total, calculated as 4 multiplied by 37 mA; this excludes external load current and regulator tolerance. Select the supply path and decoupling for that operating level, while confirming final capacitor voltage rating and ESR against the stability requirements for the selected gain.
Do not treat TS524IDT as a direct substitute for TS524IN because TS524IDT uses a 14-pin SOIC package while TS524IN uses a 14-pin DIP footprint. Also verify the output swing for the actual supply voltage rather than assuming the full plus or minus 15 V range is available at every operating condition. Confirm common-mode limits, load current, stability, and thermal performance in the final circuit, especially when driving capacitive headphone cables or unusually low impedances.
Protect low-level audio inputs from radiated and conducted noise by keeping input nodes physically small, using a quiet ground reference, and separating them from switching-regulator paths. The TS524's 4.5 nV/sqrt(Hz) input noise supports quiet amplification, but that advantage is reduced if the PCB introduces pickup or shared-supply modulation. Check the noise and distortion performance with the intended source impedance, cable length, grounding topology, and output loading rather than relying only on the amplifier's intrinsic specifications.
合規資訊
The cited STMicroelectronics product information does not establish the requested compliance declarations for TS524IN. Confirm material and environmental declarations with the manufacturer for the exact ordering code.
