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Texas Instruments TL974IN
- Part No.:
- TL974IN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TL974IN.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,196
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Product details
Overview
TL974IN from Texas Instruments is a quad rail-to-rail output operational amplifier optimized for low-noise audio preamplification and battery-powered instrumentation. It delivers 4.4 nV/√Hz input voltage noise, ±2.4 V output swing at ±2.5 V supply, 10.6 MHz gain-bandwidth product, and operates from 2.7 V to 12 V single or dual supply. It is used in professional audio circuits and portable sensor signal conditioning.
For engineers reviewing the TL974IN datasheet, TL974IN pinout, TL974IN application, or TL974IN equivalent, key selection criteria include its rail-to-rail output capability, low-noise performance at audio frequencies, thermal stability across –40°C to +125°C, and compatibility with space-constrained SOIC-14 layouts in portable equipment designs.
Technical Context
The TL974IN implements a complementary-input-stage architecture enabling rail-to-rail common-mode input range (VCC– + 1.15 V to VCC+ – 1.15 V) and full output swing within 200 mV of each rail under 2 kΩ load. Its 10.6 MHz GBWP and 60° phase margin support stable unity-gain and high-gain configurations up to 100 kHz with minimal distortion.
It features low input bias current (±0.01 nA typ), low input offset voltage (±0.21 mV typ), and high CMRR (90 dB typ), making it suitable for precision DC-coupled sensor interfaces and AC-coupled audio paths where signal integrity and dynamic range are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports single-supply operation down to 2.7 V and dual-supply operation up to ±6 V, enabling direct integration into 3.3 V and 5 V systems without level-shifting. |
| Input Voltage Noise | 4.4 nV/√Hz at 100 kHz - enables high-fidelity audio preamplification with minimal added noise floor in microphone and line-level stages. |
| Output Swing | ±2.4 V at ±2.5 V supply - delivers >96% rail-to-rail output utilization, maximizing dynamic range in low-voltage portable applications. |
| Gain-Bandwidth Product | 10.6 MHz - supports stable closed-loop gains up to 100× at 100 kHz, suitable for active filters and wideband sensor amplifiers. |
| Input Offset Voltage | ±0.21 mV (typ) - ensures <1 mV total error in DC-coupled transducer interfaces without trimming, reducing calibration overhead. |
| Common-Mode Rejection | 90 dB (typ) - rejects power supply ripple and shared-noise coupling in multi-amplifier PCB layouts with mixed analog/digital domains. |
| Operating Temperature | –40°C to +125°C - qualified for industrial-grade embedded systems and automotive cabin electronics requiring extended thermal reliability. |
Pinout & Package
TL974IN is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 6.00 mm, compatible with standard surface-mount assembly processes and IPC-7351B footprint guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 10, 12 | IN+ | Non-inverting inputs for Amplifiers 1–4 - high-impedance (≥10¹² Ω) nodes requiring guarded routing to minimize leakage and capacitive coupling. |
| 2, 6, 9, 13 | IN− | Inverting inputs for Amplifiers 1–4 - sensitive to feedback network parasitics; must be placed adjacent to RG/RF with minimal trace length. |
| 3, 7, 8, 14 | OUT | Amplifier outputs 1–4 - capable of sourcing/sinking ±65 mA (typ), supporting direct drive of 2 kΩ loads or low-impedance cables without external buffers. |
| 4 | VCC+ | Positive supply pin - requires local 0.1 µF ceramic bypass capacitor to ground to suppress high-frequency supply noise coupling into all four amplifiers. |
| 11 | VCC− | Negative supply pin - must be decoupled identically to VCC+; in single-supply use, tied to system ground with dedicated low-impedance return path. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable output within 200 mV of both rails at 2 kΩ load, preserving maximum signal headroom in 3.3 V and 5 V systems. |
| Low input voltage noise | 4.4 nV/√Hz enables clean amplification of microvolt-level sensor signals (e.g., piezoelectric, electret mic) without degrading SNR. |
| Wide supply range | Operates from 2.7 V to 12 V, allowing reuse across battery-powered (3.7 V Li-ion) and line-powered (±5 V) platforms without redesign. |
| High CMRR and PSRR | 90 dB CMRR and ≥60 dB PSRR ensure stable DC accuracy and immunity to supply ripple in noisy mixed-signal environments. |
| Quad configuration | Integrates four independent amplifiers in one SOIC-14 package, reducing board area and interconnect complexity in multi-channel signal chains. |
Applications
| Professional Audio Preamplifier | Portable Instrumentation Front-End |
|---|---|
Use Scenario: Low-noise gain stage for condenser microphone signals in field recorders and USB audio interfaces. IC Role / Device Role / Timing Role: Quad op-amp configured as four parallel preamp channels with selectable gain (20–60 dB), DC-coupled to ADC drivers. Use Value: 4.4 nV/√Hz noise floor preserves transient detail and dynamic range in 24-bit/96 kHz recording, while rail-to-rail output drives ADC reference voltage rails directly. |
Use Scenario: Signal conditioning for multi-sensor data loggers in environmental monitoring (temperature, humidity, gas sensors). IC Role / Device Role / Timing Role: Four independent amplifiers performing offset correction, filtering, and level-shifting prior to multiplexed ADC sampling. Use Value: ±0.21 mV input offset and 90 dB CMRR enable sub-10 µV measurement resolution without per-channel calibration, reducing firmware complexity. |
| Cell Phone Audio Codec Interface | Industrial Sensor Signal Chain |
Use Scenario: Line-out buffer and headset driver in smartphone baseband IC audio subsystems. IC Role / Device Role / Timing Role: Dual amplifiers used for stereo line-out buffering; remaining two for headphone driver feedback control and detection circuitry. Use Value: ±2.4 V output swing at 2.7 V supply ensures full-scale audio playback into 32 Ω loads, while low quiescent current (2.8 mA per amp) extends battery life. |
Use Scenario: Analog front-end for 4–20 mA loop-powered transmitters in process control systems. IC Role / Device Role / Timing Role: One amplifier as current-sense differential receiver; others for isolation amplifier output conditioning and HART modem signal coupling. Use Value: –40°C to +125°C operating range and 125 dB large-signal voltage gain ensure reliable operation in harsh enclosures, while 2.7 V minimum supply supports low-power loop design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4134UA | Lower noise (3.2 nV/√Hz), higher supply current (4 mA/amp), no rail-to-rail output (clips ~1.5 V from rails) | Better suited for ultra-low-noise studio-grade audio; not ideal for low-voltage rail-limited systems | Select when absolute noise floor is priority and supply headroom ≥±3 V is available. |
| LMV434MT | Higher noise (12 nV/√Hz), rail-to-rail input/output, lower GBWP (3 MHz), smaller TSSOP-14 package | Optimized for cost-sensitive portable devices where size matters more than audio fidelity | Select when board space is constrained and noise requirements are relaxed to ≤0.01% THD+N. |
Compared with OPA4134UA and LMV434MT, TL974IN uniquely balances rail-to-rail output, 4.4 nV/√Hz noise, and 10.6 MHz bandwidth in a standard SOIC-14, making it optimal for portable audio and precision instrumentation where voltage headroom and fidelity are co-constrained.
Availability
TL974IN is available at Aetrix Electronics and suitable for professional audio circuits, portable instrumentation front-ends, and industrial sensor signal chains requiring stable component supply, long-term manufacturability, and guaranteed RoHS compliance.
Supply support for TL974IN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op-amps and signal-chain solutions.
The TL97x family was designed specifically for low-noise, rail-to-rail-output applications in battery-powered and portable equipment - emphasizing audio fidelity, thermal robustness, and supply flexibility without sacrificing DC precision.
FAQ
What is the maximum supply voltage rating for TL974IN?
The absolute maximum supply voltage for TL974IN is 15 V across VCC+ and VCC− terminals. However, the recommended operating range is 2.7 V to 12 V. Exceeding 12 V may degrade long-term reliability and is not characterized over temperature; operation above 15 V risks permanent damage per the Absolute Maximum Ratings table in the TL974IN datasheet.
Does TL974IN support true rail-to-rail input operation?
No, TL974IN features rail-to-rail *output* swing but not rail-to-rail *input*. Its common-mode input voltage range is specified as VCC– + 1.15 V to VCC+ – 1.15 V - meaning it cannot accept signals within ~1.15 V of either supply rail. This limitation is inherent to its complementary-input-stage architecture, as documented in Section 6.2.1 of the TL974IN datasheet.
What is the typical output current capability of TL974IN per amplifier?
TL974IN can source and sink up to ±65 mA per amplifier (typical) at 25°C, as specified in the Electrical Characteristics table. This allows direct driving of moderate loads such as 2 kΩ resistive networks or short cable runs without external buffers. Sustained output currents above ±50 mA require attention to thermal dissipation due to its SOIC-14 package thermal resistance (θJA = 86°C/W).
Can TL974IN be used in single-supply configurations?
Yes, TL974IN supports single-supply operation from 2.7 V to 12 V. In this mode, VCC− is connected to ground, and VCC+ receives the positive supply. Input common-mode range then spans 1.15 V to (VCC+ – 1.15 V), and output swings from near ground to within 200 mV of VCC+. Proper biasing of input signals (e.g., using DC-blocking capacitors or resistor dividers) is required to stay within these limits.
Is TL974IN pin-compatible with other quad op-amps in SOIC-14 packages?
TL974IN uses the industry-standard SOIC-14 pinout for quad op-amps (per JEDEC MS-012), matching pin assignments for IN+, IN−, OUT, VCC+, and VCC− across most TI and third-party equivalents. However, internal functions like shutdown pins or enable logic differ - always verify pin mapping against the specific alternative's datasheet before substitution, as TL974IN has no enable/shutdown functionality.
TL974IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 2mA (x4 Channels)
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TL974IN FAQ
1.How can I place an order for TL974IN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL974IN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TL974IN reliable?
The price and inventory of TL974IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL974IN is usually 5 days.
3.What payment methods are accepted for TL974IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL974IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL974IN?
TL974IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL974IN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TL974IN?
For technical support, including TL974IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL974IN requirements.
6.How does Aetrix verify that TL974IN is sourced from the original manufacturer or authorized distributors?
All TL974IN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TL974IN meets industry standards.
7.What is the process for return or replacement of TL974IN?
All TL974IN units undergo pre-shipment inspection (PSI). If there is an issue with TL974IN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TL974IN part is unused and in its original packaging.
Return procedure for TL974IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL974IN Tags
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