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Texas Instruments TL974IDG4
- Part No.:
- TL974IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL974IDG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,597
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Product details
Overview
TL974IDG4 from Texas Instruments is a quad rail-to-rail output operational amplifier optimized for low-noise audio preamplification and portable battery-powered systems. It operates from 2.7V to 12V single supply or ±1.35V to ±6V dual supply, delivers 4.4 nV/√Hz input voltage noise at 100 kHz, supports ±2.4V output swing at ±2.5V supplies, and features 10.6 MHz gain-bandwidth product with 60° phase margin into 2 kΩ/100 pF.
For engineers reviewing the TL974IDG4 datasheet, TL974IDG4 pinout, TL974IDG4 application, or TL974IDG4 equivalent, key selection considerations include its quad-channel rail-to-rail output architecture, low-noise performance in audio signal chains, thermal stability across –40°C to +125°C, and compatibility with space-constrained SOIC-14 layouts requiring minimal external components.
Technical Context
The TL974IDG4 implements a complementary-input-stage architecture enabling rail-to-rail common-mode input range (VCC– +1.15 V to VCC+ –1.15 V) and rail-to-rail output swing (±2.4 V at ±2.5 V). Its internal design uses paralleled NMOS and PMOS differential pairs to maintain CMRR ≥90 dB and PSRR ≥70 dB across frequency while minimizing offset drift (±0.25 μV/°C).
It operates as a unity-gain-stable voltage-feedback amplifier with 2.8 mA per amplifier quiescent current, 125 dB large-signal voltage gain, and 65 mA output sink/source capability-enabling direct drive of 2 kΩ loads without external buffering in audio line-driver and sensor interface applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V single supply; enables operation from Li-ion battery (3.0–4.2 V) or 5 V/12 V rails without level-shifting. |
| Input Voltage Noise | 4.4 nV/√Hz at 100 kHz; supports high-fidelity audio preamp stages with <0.003% THD at 1 kHz. |
| Output Swing | ±2.4 V at ±2.5 V supply; delivers >96% of full rail-to-rail dynamic range for maximum signal headroom. |
| Gain-Bandwidth Product | 10.6 MHz; sustains stable closed-loop gain up to G = 100 at audio frequencies with 60° phase margin. |
| Input Offset Voltage | ±0.21 mV typical; reduces DC error in precision sensor amplifiers and active filters without trimming. |
| Common-Mode Rejection | 90 dB typical; rejects supply ripple and coupled noise in mixed-signal PCB environments. |
| Quiescent Current | 2.8 mA per amplifier; balances low-noise performance with power efficiency in always-on portable circuits. |
Pinout & Package
TL974IDG4 is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 6.00 mm, compatible with standard surface-mount reflow processes and offering robust thermal performance (RθJA = 86 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 10, 12 | IN+ | Non-inverting inputs for Amplifier A, B, C, D - accept signals up to VCC– +1.15 V and VCC+ –1.15 V. |
| 2, 6, 9, 13 | IN– | Inverting inputs for Amplifier A, B, C, D - enable standard op-amp configurations including inverting gain stages. |
| 3, 7, 8, 14 | OUT | Amplifier A, B, C, D outputs - deliver rail-to-rail swing and ±65 mA drive capability into 2 kΩ loads. |
| 4 | VCC– | Negative supply pin - connects to ground (single supply) or negative rail (dual supply); referenced by all amplifiers. |
| 11 | VCC+ | Positive supply pin - accepts 2.7–12 V; powers all four amplifiers simultaneously with shared bias network. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ±2.4 V output at ±2.5 V supply, maximizing usable dynamic range in low-voltage audio and sensor interfaces. |
| Very low input voltage noise | 4.4 nV/√Hz at 100 kHz enables clean amplification of microvolt-level microphone or piezoelectric sensor signals. |
| Wide supply range | Operates from 2.7 V to 12 V single supply - supports direct integration into Li-ion, USB-powered, and industrial 5/12 V systems. |
| High CMRR and PSRR | 90 dB CMRR and 70 dB PSRR minimize interference from noisy digital supplies and ground bounce in mixed-signal boards. |
| Thermal stability | Specified over –40°C to +125°C with ±0.25 μV/°C offset drift - suitable for automotive cabin and industrial control environments. |
Applications
| Professional Audio Preamplifier | Portable Music Player Line Driver |
|---|---|
Use Scenario: Amplifying low-level signals from condenser microphones or instrument pickups before ADC conversion. IC Role / Device Role / Timing Role: Quad-channel low-noise preamplifier providing gain, DC blocking, and impedance matching. Use Value: 4.4 nV/√Hz noise floor preserves signal integrity; rail-to-rail output ensures full utilization of 24-bit ADC input range. |
Use Scenario: Driving stereo headphone outputs and line-level analog outputs in compact handheld devices. IC Role / Device Role / Timing Role: Dual-channel buffer and level-shifter delivering low-distortion audio to variable-impedance loads. Use Value: ±2.4 V output swing at 3.3 V supply provides >90% headroom; 65 mA drive capability supports 16 Ω headphones directly. |
| Industrial Sensor Signal Conditioning | Medical Instrumentation Front-End |
Use Scenario: Amplifying millivolt-level outputs from RTDs, thermocouples, or strain gauges in PLC modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage with programmable gain and filtering. Use Value: ±0.21 mV input offset and 90 dB CMRR suppress thermal EMFs and common-mode noise in 4–20 mA loop interfaces. |
Use Scenario: Biopotential acquisition in ECG/EEG monitors requiring ultra-low noise and high DC accuracy. IC Role / Device Role / Timing Role: First-stage gain and anti-aliasing filter driver for medical-grade analog front-ends. Use Value: 0.003% THD at 1 kHz and 125 dB open-loop gain ensure faithful reproduction of sub-mV physiological waveforms. |
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 GBW (8 MHz), but higher quiescent current (4 mA per amp) and narrower supply range (±2.25 V to ±18 V). | Better suited for high-end audio DAC output stages where power budget allows; less optimal for battery-critical portable designs. | Select OPA4134UA when ultimate noise performance outweighs power efficiency and board space constraints. |
| LMV4342MA | Higher noise (12 nV/√Hz), lower GBW (5.5 MHz), but lower supply current (0.75 mA per amp) and same 2.7–12 V range. | Targeted at cost-sensitive consumer electronics where moderate noise is acceptable for line-level signal routing. | Select LMV4342MA when system-level power consumption dominates over signal fidelity requirements. |
Compared with TL974IDG4, OPA4134UA trades higher power for superior noise and bandwidth, while LMV4342MA sacrifices noise and speed to achieve ultra-low quiescent current - making TL974IDG4 the balanced choice for portable audio and precision sensor interfaces demanding both low noise and efficient operation.
Availability
TL974IDG4 is available at Aetrix Electronics and suitable for professional audio equipment, portable music players, industrial sensor modules, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL974IDG4 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 high-performance op-amps and precision signal-chain solutions.
The TL97x family was designed specifically for low-noise, rail-to-rail output applications in battery-powered and portable audio systems - emphasizing noise density, output drive strength, and wide supply flexibility without compromising thermal stability.
FAQ
What is the maximum operating supply voltage for TL974IDG4?
The TL974IDG4 has an absolute maximum supply voltage rating of 15 V, but its recommended operating range is 2.7 V to 12 V. Operating above 12 V risks exceeding specified electrical characteristics and may reduce long-term reliability. The device is fully characterized from –40°C to +125°C within this 2.7–12 V window, and TI explicitly cautions against sustained operation beyond 12 V in the datasheet's Power Supply Recommendations section.
Does TL974IDG4 support true rail-to-rail input operation?
No, TL974IDG4 does not support true 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 arises from its complementary-input-stage architecture, which uses NMOS and PMOS pairs with a transition region between them. While the output swings rail-to-rail, input signals must stay ≥1.15 V away from each supply to maintain specified CMRR, PSRR, and distortion performance.
Can TL974IDG4 drive capacitive loads without instability?
TL974IDG4 is unity-gain stable but exhibits reduced phase margin with increasing capacitive load - dropping from 60° at no load to ~45° at 130 pF and ~30° at 250 pF (per Figure 5-6). For loads >100 pF, TI recommends adding a small series isolation resistor (e.g., 50 Ω) between the output and capacitance to restore stability. This behavior is confirmed in the Typical Characteristics section and applies directly to the TL974IDG4's SOIC-14 variant as part of the TL97x family.
What is the thermal resistance (RθJA) of TL974IDG4 in its SOIC-14 package?
The TL974IDG4 in the SOIC-14 (D) package has a junction-to-ambient thermal resistance (RθJA) of 86 °C/W, as documented in Table 5-5 under Thermal Information. This value assumes standard JEDEC JESD 51-7 test conditions on a two-layer board with 1 in² copper pad. Actual thermal performance in end equipment depends on PCB layout, copper area, airflow, and adjacent heat sources - but 86 °C/W serves as the baseline for calculating junction temperature rise under specified 2.8 mA per amplifier quiescent current.
Is TL974IDG4 pin-compatible with other TL97x variants like TL974CDR?
Yes, TL974IDG4 is pin-compatible with all TL974 variants in the SOIC-14 (D) package, including TL974CDR and TL974IPW. The pin configuration - including IN+, IN–, OUT, VCC+, and VCC– assignments - is identical across temperature grades and packaging options for the TL974. However, performance parameters such as input offset voltage (±0.21 mV typical for I-grade vs ±4 mV for C-grade) and operating temperature range (–40°C to +125°C for I vs 0°C to +70°C for C) differ, so electrical substitution requires verification against system-level requirements.
TL974IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
TL974IDG4 FAQ
1.How can I place an order for TL974IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL974IDG4 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 TL974IDG4 reliable?
The price and inventory of TL974IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL974IDG4 is usually 5 days.
3.What payment methods are accepted for TL974IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL974IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL974IDG4?
TL974IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL974IDG4 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 TL974IDG4?
For technical support, including TL974IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL974IDG4 requirements.
6.How does Aetrix verify that TL974IDG4 is sourced from the original manufacturer or authorized distributors?
All TL974IDG4 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 TL974IDG4 meets industry standards.
7.What is the process for return or replacement of TL974IDG4?
All TL974IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL974IDG4, 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 TL974IDG4 part is unused and in its original packaging.
Return procedure for TL974IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL974IDG4 Tags
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