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Texas Instruments TL972IDRG4
- Part No.:
- TL972IDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL972IDRG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
TL972IDRG4 from Texas Instruments is a dual rail-to-rail output operational amplifier optimized for low-noise audio preamplification and portable battery-powered systems. 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 high-fidelity headphone amplifiers and sensor signal conditioning stages.
For engineers reviewing the TL972IDRG4 datasheet, TL972IDRG4 pinout, TL972IDRG4 application, or TL972IDRG4 equivalent, key selection criteria include its rail-to-rail output capability under low-voltage operation, verified 4.4 nV/√Hz noise floor at 100 kHz, thermal stability across –40°C to +125°C, and compatibility with 8-pin SOIC (D) PCB footprints requiring no layout redesign.
Technical Context
The TL972IDRG4 implements a complementary N-channel/P-channel input stage enabling true rail-to-rail output swing while maintaining stable phase margin (60° typical) across 2.7–12 V supply range. Its internal architecture supports unity-gain stability with capacitive loads up to 250 pF without external isolation resistors.
It features matched dual amplifier channels sharing common supply rails, with independent input pairs (IN1±, IN2±) and outputs (OUT1, OUT2), each delivering 65 mA sink/source current and 125 dB large-signal voltage gain at 25°C - critical for driving low-impedance transducers and ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4.4 nV/√Hz at 100 kHz - enables high-resolution audio signal amplification without audible hiss |
| Output Swing | ±2.4 V at ±2.5 V supply - delivers full dynamic range into 2 kΩ load near supply rails |
| Supply Range | 2.7 V to 12 V - supports single-supply 3.3 V/5 V logic and dual-supply ±2.5 V/±5 V analog systems |
| Gain-Bandwidth Product | 10.6 MHz - sustains stable closed-loop gain ≥10 up to 1 MHz for anti-aliasing filter interfaces |
| Input Offset Voltage | ±0.21 mV (typ) - minimizes DC error in precision sensor buffer and instrumentation amplifier topologies |
| Common-Mode Rejection | 90 dB (typ) - rejects power supply ripple and shared-noise coupling in mixed-signal PCB layouts |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin electronics and industrial control environments |
Pinout & Package
TL972IDRG4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 6.00 mm, compatible with standard surface-mount reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - drives external load directly; rail-to-rail swing supports 0–5 V or ±2.5 V output ranges |
| 2 | IN1– | Inverting input of Amp1 - accepts feedback network for precise gain setting in inverting configurations |
| 3 | IN1+ | Non-inverting input of Amp1 - high-impedance node (IIB = ±0.01 nA typ) for sensor or reference signal routing |
| 4 | VCC– | Negative supply rail - connects to ground (single supply) or negative voltage (dual supply); must be bypassed with 0.1 µF ceramic |
| 5 | VCC+ | Positive supply rail - accepts 2.7–12 V; decoupling capacitor placement critical for PSRR >60 dB |
| 6 | IN2+ | Non-inverting input of Amp2 - electrically isolated from Amp1 inputs; enables dual-channel independent signal paths |
| 7 | IN2– | Inverting input of Amp2 - supports differential input configuration when paired with IN2+ and external resistor network |
| 8 | OUT2 | Amplifier 2 output - identical performance to OUT1; allows stereo audio buffering or dual-sensor conditioning on one IC |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable signal headroom within 100 mV of both supply rails - essential for maximizing SNR in low-voltage audio chains |
| Low input voltage noise | 4.4 nV/√Hz at 100 kHz - preserves weak microphone or piezoelectric sensor signals without degrading dynamic range |
| Wide supply voltage range | Operates from 2.7 V to 12 V - eliminates need for separate LDOs in multi-rail systems and simplifies power tree design |
| High output drive capability | Sinks and sources up to 65 mA per channel - directly drives 16 Ω headphones or 100 pF capacitive loads without external buffers |
| Thermal robustness | Specified over –40°C to +125°C with RθJA = 97°C/W (SOIC-8) - ensures reliability in enclosed enclosures and automotive junction boxes |
Applications
| Professional Audio Preamp | Portable Sensor Interface |
|---|---|
Use Scenario: Low-noise amplification of condenser microphone output before ADC sampling in studio-grade USB audio interfaces. IC Role / Device Role / Timing Role: Dual-channel voltage follower and gain stage - first amplifier buffers mic bias, second provides programmable gain with minimal added noise. Use Value: 4.4 nV/√Hz noise floor ensures >110 dB SNR at 1 Vrms output, preserving transient detail and harmonic integrity in vocal recordings. | Use Scenario: Signal conditioning for MEMS accelerometers in handheld diagnostic tools requiring battery life >24 hours. IC Role / Device Role / Timing Role: Dual op-amp configured as DC-coupled instrumentation amplifier front-end - rejects common-mode motion artifacts while amplifying differential acceleration signals. Use Value: Rail-to-rail output swing at 3.3 V supply enables full-scale utilization of 12-bit SAR ADC input range, improving resolution by 0.5 LSB over non-rail-to-rail alternatives. |
| Headphone Driver | Industrial Analog Input Module |
Use Scenario: Direct-drive headphone amplifier in Bluetooth-enabled wireless earbuds with integrated DAC. IC Role / Device Role / Timing Role: Single-supply (3.3 V) dual op-amp in split-rail virtual-ground configuration - delivers ±1.65 V output swing to 32 Ω loads. Use Value: 65 mA output current per channel supports 100 mW into 32 Ω without clipping, meeting IEC 60684-2 loudness compliance. | Use Scenario: Isolated analog input channel in DIN-rail PLC modules accepting 0–10 V or 4–20 mA field signals. IC Role / Device Role / Timing Role: Dual op-amp performing level-shifting and filtering - first stage converts current loop to voltage, second applies 2nd-order low-pass anti-aliasing. Use Value: 10.6 MHz GBWP enables sharp 1 kHz cutoff with <0.1 dB passband ripple, meeting IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2376AIDR | Lower noise (4.2 nV/√Hz), higher quiescent current (760 µA vs 2.8 mA per amp), same SOIC-8 package | Better suited for ultra-low-power sensor nodes where 2.8 mA total supply current is prohibitive | Select OPA2376AIDR only if sub-1 mA per amplifier is mandatory and 0.2 nV/√Hz noise reduction justifies cost premium |
| LMV722MMX/NOPB | Higher noise (11 nV/√Hz), lower GBWP (1.5 MHz), same 8-pin VSSOP package but smaller footprint (3.0 × 3.0 mm) | Acceptable for cost-sensitive consumer audio where SNR >95 dB suffices and board space is constrained | Choose LMV722MMX/NOPB only for non-critical audio paths or legacy designs already using VSSOP land patterns |
Compared with OPA2376AIDR and LMV722MMX/NOPB, TL972IDRG4 offers optimal balance of noise (4.4 nV/√Hz), bandwidth (10.6 MHz), and drive strength (65 mA) in industry-standard SOIC-8 - making it the preferred choice for new designs targeting professional audio fidelity and industrial signal integrity.
Availability
TL972IDRG4 is available at Aetrix Electronics and suitable for professional audio equipment, portable medical diagnostics, industrial analog input modules, and battery-powered sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL972IDRG4 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 amplifiers and signal-chain solutions.
The TL97x family was designed specifically for low-noise, rail-to-rail output amplification in portable and battery-operated equipment - emphasizing audio fidelity, wide supply flexibility, and thermal resilience in compact packages.
FAQ
What is the maximum capacitive load the TL972IDRG4 can drive without instability?
The TL972IDRG4 maintains stable operation with capacitive loads up to 250 pF when configured in unity-gain mode, as verified by phase margin measurements ≥60° across 2.7–12 V supply range. For loads exceeding 250 pF, TI recommends adding a series isolation resistor (RISO = 50 Ω) between the output and capacitance to preserve stability - a technique validated in Figure 5-7 and Figure 5-18 of the TL972IDRG4 datasheet.
Does the TL972IDRG4 support true rail-to-rail input voltage range?
No, the TL972IDRG4 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 at 25°C, meaning it cannot accept signals within ~1.15 V of either supply rail. This limitation is due to its complementary P/N-channel input stage architecture, where transition region performance (CMRR, PSRR, noise) degrades near the rails - details are provided in Section 6.2.1 of the TL972IDRG4 datasheet.
What is the thermal resistance (RθJA) of the TL972IDRG4 in its SOIC-8 package?
The TL972IDRG4 in the SOIC-8 (D) package has a junction-to-ambient thermal resistance (RθJA) of 97°C/W, measured per JESD 51-7 standards. This value assumes standard JEDEC 2-layer board conditions (2 oz copper, 1 in² copper area). Actual thermal performance may improve with enhanced PCB copper pour or thermal vias - critical for sustained 65 mA output current operation at elevated ambient temperatures.
Can the TL972IDRG4 operate from a single 3.3 V supply?
Yes, the TL972IDRG4 is fully specified for single-supply operation from 2.7 V to 12 V, including 3.3 V. At 3.3 V, it delivers ±1.5 V output swing into 2 kΩ (per Figure 5-12/5-13), supports common-mode input up to 2.15 V, and maintains 10.6 MHz GBWP and 4.4 nV/√Hz noise - making it suitable for 3.3 V microcontroller-based audio and sensor systems without level-shifting circuitry.
Is the TL972IDRG4 pin-compatible with other dual op-amps in SOIC-8 packages?
The TL972IDRG4 uses the industry-standard 8-pin SOIC (D) pinout for dual op-amps: Pin 1 = OUT1, Pin 2 = IN1–, Pin 3 = IN1+, Pin 4 = VCC–, Pin 5 = VCC+, Pin 6 = IN2+, Pin 7 = IN2–, Pin 8 = OUT2. This matches the pin mapping of LM358, TL072, and OPA234 - enabling drop-in replacement in existing layouts where rail-to-rail output and low-noise performance are required upgrades.
TL972IDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 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:
- 8-SOIC
TL972IDRG4 FAQ
1.How can I place an order for TL972IDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL972IDRG4 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 TL972IDRG4 reliable?
The price and inventory of TL972IDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL972IDRG4 is usually 5 days.
3.What payment methods are accepted for TL972IDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL972IDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL972IDRG4?
TL972IDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL972IDRG4 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 TL972IDRG4?
For technical support, including TL972IDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL972IDRG4 requirements.
6.How does Aetrix verify that TL972IDRG4 is sourced from the original manufacturer or authorized distributors?
All TL972IDRG4 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 TL972IDRG4 meets industry standards.
7.What is the process for return or replacement of TL972IDRG4?
All TL972IDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL972IDRG4, 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 TL972IDRG4 part is unused and in its original packaging.
Return procedure for TL972IDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL972IDRG4 Tags
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LM358DT
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LM358DR
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LM2904DR
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LM358ADR
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