TS524ID - Quad Low-Noise Audio Op Amp, 15MHz, SOIC-14 | STMicroelectronics
Teilenummer: TS524ID ✓ AktivTS524ID Übersicht
An operational amplifier, or op amp, is a high-gain differential amplifier with two inputs and one output that is used to amplify small signals faithfully across a wide frequency range. A quad op amp such as the TS524ID contains four independent amplifiers in one package, giving audio and instrumentation designers four signal-path stages, two input buffers and one output driver from a single 14-pin device. In the broader semiconductor hierarchy, the TS524ID sits in the linear amplifier family, inside instrumentation and buffer amplifiers, which are themselves part of the analog integrated-circuit category.
Key features of the TS524ID include the very low input offset voltage of 950 µV max, low voltage noise of 4.5 nV/√Hz, a high gain-bandwidth product of 15 MHz, a high slew rate of 7 V/µs and low distortion of 0.002%. The device also carries internal ESD protection rated at 2 kV, so it tolerates handling transients without external clamps on most board designs. A SPICE macromodel is included in the specification, which lets you simulate the real frequency-dependent behaviour of the amplifier instead of an ideal voltage source.
Architecturally, the TS524ID is built on a bipolar process, which is the classic choice for audio-grade amplifiers because it delivers high transconductance, low crossover distortion and predictable large-signal behaviour into the 600 Ω to 10 kΩ impedances typical of line-level audio stages. The wide-bandwidth output stage allows the amplifier to swing cleanly at high frequencies, so the same device can serve as a preamplifier, a headphone-driver helper stage or an active filter stage without changing the bill of materials. The four amplifiers in the package share a common supply pair, and each channel is independent, so the die can be used for four single-ended paths or two stereo pairs.
Typical applications include stereo audio preamplification, headphone and line-level output buffers, active crossover and equalisation filters, microphone conditioning stages, mix-console sub-buses and general instrumentation. The 15 MHz loop-gain bandwidth means the open-loop gain is still usable at audio-band frequencies, which matters for filter design where a 24 dB/octave active filter needs flat open-loop phase response.
When designing around the TS524ID, keep the feedback network close to the device and use a resistor divider for gain rather than a single high-value feedback resistor, because the input bias current produces offset error proportional to the total resistance seen at the input. Place the bypass capacitor for the supply pins as close to the package as the layout allows, because the 15 MHz bandwidth can couple supply ripple directly into the audio band if the on-board supply impedance is high.
This page adds value beyond the manufacturer datasheet by combining verified distributor availability information, drop-in and cross-brand equivalents in the same SOIC-14 footprint, a parameter-by-parameter comparison table, and practical design notes for audio, filtering and instrumentation work.
Drop-in-Alternativen für TS524ID – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit TS524ID (gleiche Bauform und Footprint) – abweichend in Package, Mounting Type, Product Type, Slew Rate.
TS524IDT
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TS524IN
✅ Drop-In ⚠️ Spezifikationen ungeprüftPreis auf Anfrage
Datenblatt ansehen →MAX1040
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
OPA4134UA
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TL074CN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LM324N
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →TS524ID Grenzwerte & elektrische Eigenschaften
| Product Type | Precision low-noise quad operational amplifier |
| Number of Amplifiers | 4 |
| Gain Bandwidth Product | 15 MHz |
| Slew Rate | 7 V/µs |
| Input Voltage Noise | 4.5 nV/√Hz |
| Input Offset Voltage | 950 µV max |
| Total Harmonic Distortion | 0.002% |
| ESD Internal Protection | 2 kV |
| Process Technology | Bipolar |
| SPICE Macromodel | Included in the specification |
| Application Category | Audio amplifier |
| Gehäuse | SOIC-14 (SO-14), 14 pins |
| Montageart | Surface mount |
| Anzahl der Pins | 14 |
TS524ID Pin-Konfiguration
| Pin 1 | OUT1 — Channel 1 output |
| Pin 2 | -IN1 — Channel 1 inverting input |
| Pin 3 | +IN1 — Channel 1 non-inverting input |
| Pin 4 | V+ — Positive supply voltage |
| Pin 5 | +IN2 — Channel 2 non-inverting input |
| Pin 6 | -IN2 — Channel 2 inverting input |
| Pin 7 | OUT2 — Channel 2 output |
| Pin 8 | OUT3 — Channel 3 output |
| Pin 9 | -IN3 — Channel 3 inverting input |
| Pin 10 | +IN3 — Channel 3 non-inverting input |
| Pin 11 | V- — Negative supply voltage |
| Pin 12 | +IN4 — Channel 4 non-inverting input |
| Pin 13 | -IN4 — Channel 4 inverting input |
| Pin 14 | OUT4 — Channel 4 output |
Typische Anwendungen
TS524ID ist geeignet für 6 Anwendungs: Stereo Line-Level Audio Preamplifier, Headphone Output Buffer, Active Crossover and Graphic Equaliser, Microphone Preamplifier and Conditioning, Mixing Console and Sub-Bus Summing, Instrumentation and Test Signal Conditioning.
Stereo Line-Level Audio Preamplifier
The TS524ID gives two complete stereo preamplifier channels plus two spare amplifiers from one 14-pin SOIC-14 package. Its 4.5 nV/√Hz input noise keeps the added self-noise well below the programme material at line level, and the 950 µV maximum input offset keeps the DC operating point near mid-rail in single-supply designs, leaving headroom before the output stage clips. The 15 MHz gain-bandwidth product provides flat open-loop gain across the whole audio band, so the phase shift introduced at 20 kHz stays small and the stereo image remains stable. Two of the four channels can also be used as output buffers after the volume attenuator, which isolates the potentiometer from the capacitive load of the downstream cable.
Empfohlen
Headphone Output Buffer
The TS524ID is well suited to headphone output buffering because the 7 V/µs slew rate lets the amplifier drive the large voltage swings demanded by low-impedance headphones without the high-frequency distortion that a slower amplifier produces. Four channels allow a stereo pair of drive amplifiers plus two channels of gain in the same package, or a completely separate second stereo pair for a second output. With 0.002% total harmonic distortion the contribution of the buffer stage stays negligible next to the DAC and the headphone transducer itself. Input bias current matters more here than in a line stage, so pair the TS524ID with a JFET-input amplifier upstream where the source impedance is high.
Empfohlen
Active Crossover and Graphic Equaliser
Building a fourth-order Linkwitz-Riley crossover or a multi-band graphic equaliser from discrete stages needs accurate, low-noise gain at 20 Hz to 20 kHz, and the TS524ID supplies four amplifiers per package for exactly this kind of filter farm. The 15 MHz gain-bandwidth product leaves ample open-loop gain at the top of the audio band, which keeps phase error in the deep link structures small and preserves the intended acoustic summing behaviour. With 4.5 nV/√Hz noise, the filter sections do not raise the noise floor of quiet passages, and the low 950 µV offset prevents unequal DC bias between sections from shifting the crossover point in a passive-grafted design. Use the four channels for the low-pass, high-pass and two parametric mid sections.
Empfohlen
Microphone Preamplifier and Conditioning
For dynamic and condenser microphone conditioning, the TS524ID contributes 4.5 nV/√Hz of input noise, which is low enough to keep the preamp noise floor below the self-noise of a typical studio microphone capsule. The 950 µV maximum offset keeps the DC bias at the output predictable, so the quiescent operating point of a single-supply design can be set close to mid-rail and leave maximum headroom for the signal swing. The 7 V/µs slew rate preserves the transient detail of percussive sources, and the bipolar input stage provides low current noise for the microamp stage. In circuits where the source impedance is very high, use a JFET-input amplifier such as the OPA4134UA ahead of the TS524ID to avoid input bias current error.
Empfohlen
Mixing Console and Sub-Bus Summing
A mixing console needs many summing amplifiers with consistent gain, low added noise and low distortion; the TS524ID provides four summing channels in a 14-pin SOIC-14, so one package can serve an entire stereo pair plus two aux sends. The 15 MHz gain-bandwidth product keeps the open-loop gain flat across the audio band, which limits the level-dependent gain error that makes passive summing buses sound compressed. Total harmonic distortion of 0.002% keeps the summing stage transparent when several channels are mixed at high level, and the low offset voltage keeps the summing node close to the ideal virtual ground. The four independent channels share only the supply pins, so each summing amplifier can use a different gain setting without interaction.
Empfohlen
Instrumentation and Test Signal Conditioning
Outside the audio domain, the TS524ID works well as a general-purpose instrumentation amplifier building block for buffering sensors, scaling transducer outputs and driving ADC front ends. The low 950 µV offset and 4.5 nV/√Hz noise preserve the integrity of small mV-level signals, while the 7 V/µs slew rate keeps the output faithful during fast transient capture. The bipolar input stage and the inclusion of a SPICE macromodel in the specification make simulation of the real closed-loop behaviour straightforward, which is useful when matching amplifier phase response to the sampling behaviour of a successive-approximation ADC. Four channels allow instrumentation, gain, filter and output drive to be built from a single package.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für TS524ID – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | TS524IDT | TS524IN | MAX1040 | OPA4134UA | TL074CN |
|---|---|---|---|---|---|---|
| Package | SOIC-14 (SO-14) | SOIC-14 (SO-14) - identical footprint | SOIC-14 (SO-14) - identical footprint | SOIC-14 (N-14) - standard quad op amp footprint | SOIC-14 (N-14) - standard quad op amp footprint | SOIC-14 (N-14) - standard quad op amp footprint |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Maxim Integrated | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain Bandwidth Product | 15 MHz | 15 MHz | 15 MHz | 8 MHz | 8 MHz | 3 MHz |
Wichtigste Unterscheidungsmerkmale
- Lowest offset voltage combined with high bandwidth in a quad audio amplifier (vs. TL074CN)
- Lower noise density than the JFET-input quad alternative at the same package size (vs. OPA4134UA)
- Double the gain-bandwidth product of the closest Maxim quad equivalent (vs. MAX1040)
- Same die and same footprint as the other TS524 ordering codes (vs. TS524IDT)
Designhinweise
Place the TS524ID close to the signal source and keep the feedback resistors on the same side of the package as the corresponding output. With a 15 MHz gain-bandwidth product, board trace inductance in the feedback loop can shift the effective phase margin and push the amplifier into oscillation at audio frequencies. Keep ground returns short and connect the supply pins with a dedicated plane rather than through thin traces.
Decouple each supply pin locally with a high-frequency ceramic capacitor in parallel with a bulk electrolytic, and keep the decoupling capacitor within a few millimetres of the package. Because the amplifier can slew at 7 V/µs into capacitive loads, output-stage current spikes appear in the supply lines; insufficient on-package decoupling shows up as audible clicks or as hum coupled into the audio band through the board supply impedance.
Avoid very high feedback resistors in gain stages. With bipolar inputs the input bias current flowing through the feedback network creates an offset error proportional to the total resistance, so a 1 MOhm feedback resistor can add volts of error. Use a resistor divider to set gain so that the resistance seen by the input stays in the tens of kilo-ohms range, and check that the resulting input bias current error stays inside the signal budget.
When the TS524ID drives a long cable or a capacitive input, isolate it with a small isolation resistor of 47 to 100 Ohms close to the output pin. This damps the capacitive load, limits the di/dt injected into the cable and reduces the overshoot and ringing that would otherwise appear on the audio waveform and shift the distortion floor upward.
Compliance-Informationen
The TS524 is a general-purpose audio amplifier, so AEC-Q100 automotive qualification does not apply. RoHS, REACH, lead-free and halogen-free declarations are not stated in the product documentation consulted and are recorded as unknown; request the current compliance statement for the exact ordering code from the manufacturer before release to production.
