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Texas Instruments OPA2725AIDGKR
- Part No.:
- OPA2725AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2725AIDGKR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
OPA2725AIDGKR from Texas Instruments is a dual, rail-to-rail output, 20MHz gain-bandwidth precision CMOS operational amplifier optimized for driving 16-bit ADCs such as the ADS8342. It delivers 30V/µs slew rate, 6nV/√Hz input voltage noise at 100kHz, 0.0003% THD+N at 1kHz, and operates from ±2V to ±6V or +4V to +12V supplies. Its key role is high-fidelity signal buffering in optical networking transimpedance amplifiers and active filter stages.
For engineers reviewing the OPA2725AIDGKR datasheet, OPA2725AIDGKR pinout, OPA2725AIDGKR application, or OPA2725AIDGKR equivalent, this page provides verified specifications, package-validated pin functions, real-world use cases in 16-bit data acquisition and photodiode I/V conversion, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The OPA2725AIDGKR uses a proprietary 12V analog CMOS process with a class AB output stage enabling rail-to-rail swing within 175mV of rails under 100kΩ load while maintaining >110dB open-loop gain. Its input stage features <200pA bias current and extends common-mode range to ground, supporting single-supply operation without level-shifting.
It achieves fast 16-bit settling (450ns at 0.01%) via high GBW and low noise, with excellent PSRR (≥100dB), CMRR (≥94dB), and AOL (≥120dB) across −40°C to +125°C - critical for precision timing and dynamic range preservation in ADC front-ends and optical monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 20MHz - enables stable unity-gain buffer operation and supports ≥100kHz closed-loop bandwidth in precision active filters. |
| Slew Rate | 30V/µs - ensures distortion-free reproduction of fast 5V-step signals within 450ns for 16-bit ADC acquisition windows. |
| Input Voltage Noise | 6nV/√Hz at 100kHz - minimizes noise gain amplification in high-CD photodiode transimpedance applications. |
| THD+N | 0.0003% at 1kHz - preserves signal fidelity in high-end audio and test equipment signal chains. |
| Quiescent Current | 5.5mA per channel max - balances low power with high-speed performance in portable and industrial instrumentation. |
| Supply Range | +4V to +12V or ±2V to ±6V - supports flexible single/dual supply design in mixed-signal systems without external regulators. |
| Output Swing | Within 175mV of rails (100kΩ load) - maximizes dynamic range in 12V or ±5V systems interfacing to 16-bit ADCs. |
Pinout & Package
VSSOP-8 (DGK) package: 2.3mm × 2.0mm, 0.5mm pitch, thermally enhanced, RoHS-compliant, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply | Accepts +4V to +12V or connects to +VCC in dual-supply; bypass with 1nF ceramic + 1µF tantalum. |
| 2 (OUT A) | Amplifier A Output | Rail-to-rail output capable of sourcing/sinking 40mA; drives ADC inputs or active filter loads directly. |
| 3 (−IN A) | Inverting Input A | High-impedance node (<1011Ω); used for transimpedance summing junction or inverting gain configuration. |
| 4 (+IN A) | Non-inverting Input A | Common-mode range includes ground; enables single-supply sensor interface without dc biasing. |
| 5 (OUT B) | Amplifier B Output | Independent rail-to-rail output; allows dual-channel signal conditioning (e.g., differential ADC driver). |
| 6 (−IN B) | Inverting Input B | Electrically isolated from Channel A; supports independent feedback networks for multi-stage filtering. |
| 7 (+IN B) | Non-inverting Input B | Same CMRR and PSRR specs as Channel A; suitable for reference buffering or dual-sensor signal paths. |
| 8 (V−) | Negative Supply | Connects to ground (single-supply) or −VEE (dual-supply); must be decoupled identically to V+. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of 12V or ±5V supply rails in ADC buffer stages, preserving >98% of theoretical dynamic range. |
| Low input bias current (<200pA) | Prevents signal error in high-impedance transimpedance amplifiers using 10MΩ+ feedback resistors for optical power monitoring. |
| Fast 16-bit settling (450ns) | Meets acquisition time requirements of 250kSPS 16-bit ADCs like ADS8342 without external settling optimization. |
| Excellent CMRR (≥94dB) and PSRR (≥100dB) | Maintains accuracy in noisy industrial environments where supply ripple or common-mode interference would degrade measurement integrity. |
| Stable in unity-gain configuration | Eliminates need for external compensation components in buffer applications, reducing BOM count and layout complexity. |
Applications
| Optical Networking Transimpedance Amplifier | 16-Bit ADC Driver |
|---|---|
Use Scenario: Monitoring optical power in ONET-compliant receivers using PIN photodiodes with 5–15pF junction capacitance. IC Role / Device Role / Timing Role: Converts photodiode current to voltage with minimal added noise and no phase inversion during input overvoltage events. Use Value: 6nV/√Hz noise density at 100kHz and <200pA bias current enable detection of sub-nA photocurrents with SNR >85dB. | Use Scenario: Buffering analog inputs to the ADS8342 16-bit, 250kSPS parallel-output ADC in automated test equipment. IC Role / Device Role / Timing Role: Drives ADC sample-and-hold input capacitance while settling to 0.01% in ≤450ns to meet 600ns acquisition window. Use Value: 20MHz GBW and 30V/µs slew rate ensure full-scale step response settles within ADC timing budget without droop or overshoot. |
| Active Low-Pass Filter | Portable Audio Line Driver |
Use Scenario: Four-pole Butterworth low-pass filtering at 50kHz in medical sensor signal conditioning (e.g., ECG front-end). IC Role / Device Role / Timing Role: Implements Sallen-Key topology with dual OPA2725 channels to achieve sharp roll-off and minimal passband distortion. Use Value: 0.0003% THD+N at 1kHz and rail-to-rail output swing preserve harmonic integrity across full audio band up to 20kHz. | Use Scenario: Driving stereo line outputs from portable audio DACs operating from +5V supply with battery life constraints. IC Role / Device Role / Timing Role: Provides gain, level-shifting, and output isolation while consuming only 5.5mA per channel. Use Value: 4.3mA typical quiescent current and ±2V to ±6V operation extend battery runtime without sacrificing THD+N or bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2726AIDGSR | Includes shutdown mode (6µA/ch IQ in shutdown); identical GBW, noise, and settling specs; MSOP-10 package with Enable and DGND pins. | Required where system-level power sequencing or standby current <10µA per channel is mandated (e.g., battery-powered IoT sensors). | Select OPA2726AIDGSR only if shutdown functionality is needed; pinout and PCB layout differ due to extra Enable/DGND pins. |
| OPA2132UA | FET-input architecture; 8MHz GBW; 20V/µs slew rate; 8.5nV/√Hz noise at 1kHz; SO-8 package; higher input impedance (>1012Ω). | Better suited for ultra-high-Z sensor interfaces (e.g., pH electrodes) but lacks 16-bit settling speed for fast ADCs. | Choose OPA2132UA when input impedance >1TΩ is critical and 20MHz bandwidth is not required; not drop-in compatible. |
Compared with OPA2725AIDGKR, the OPA2726AIDGSR adds shutdown control at the cost of package size and pin count, while the OPA2132UA trades bandwidth and settling speed for higher input impedance and lower 1/f noise - making each suitable for distinct precision analog subsystems.
Availability
OPA2725AIDGKR is available at Aetrix Electronics and suitable for optical transimpedance amplifiers, 16-bit ADC buffering, active filter design, and portable audio line driving requiring stable component supply across industrial temperature ranges (−40°C to +125°C).
Supply support for OPA2725AIDGKR 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA2725AIDGKR belongs to TI's OPA725/OPA726 series - high-speed, low-noise CMOS op amps designed specifically for 16-bit data acquisition systems, optical networking front-ends, and high-fidelity signal conditioning where bandwidth, settling accuracy, and noise performance are critical.
FAQ
What is the maximum capacitive load the OPA2725AIDGKR can drive stably in unity-gain configuration?
The OPA2725AIDGKR can drive up to 100pF capacitive load with minimal overshoot in unity-gain configuration when configured with appropriate feedback compensation. For larger loads (e.g., >200pF), inserting a 10Ω–20Ω resistor in series with the output inside the feedback loop - as shown in TI's Figure 3 - improves stability without degrading DC accuracy. This behavior is validated in the "Small-Signal Overshoot vs Capacitive Load" curve on page 9 of the SBOS278B datasheet.
Does the OPA2725AIDGKR support true single-supply operation with input common-mode range including ground?
Yes, the OPA2725AIDGKR supports true single-supply operation with input common-mode voltage range extending from V− (ground in single-supply mode) to (V+) − 2V. This allows direct connection of grounded sensors or reference voltages to the +IN pins without level-shifting circuitry. The device maintains ≥94dB CMRR across this full range, as specified in the Electrical Characteristics table on page 4 of SBOS278B.
What is the thermal resistance (θJA) of the OPA2725AIDGKR in its VSSOP-8 package?
The OPA2725AIDGKR in the VSSOP-8 (DGK) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, as specified in the "Thermal Resistance" row on page 5 of the SBOS278B datasheet. This value assumes standard JEDEC 2-layer board conditions and confirms suitability for continuous operation at full rated quiescent current (5.5mA per channel) across −40°C to +125°C ambient temperatures.
Can the OPA2725AIDGKR be used to drive a 600Ω audio load at 2VRMS with low distortion?
Yes, the OPA2725AIDGKR delivers 0.0003% THD+N at 1kHz with 2VRMS output into a 600Ω load, as measured per the conditions in the Electrical Characteristics table (page 4). Its rail-to-rail output swing and 40mA output current capability allow clean delivery of full-scale audio signals without clipping or crossover distortion, making it suitable for line-driver applications in professional audio interfaces.
Is the OPA2725AIDGKR pin-compatible with the OPA2726AIDGSR?
No, the OPA2725AIDGKR is not pin-compatible with the OPA2726AIDGSR. The OPA2725AIDGKR uses an 8-pin VSSOP (DGK) package with dual amplifier functionality only, while the OPA2726AIDGSR uses a 10-pin VSSOP (DGS) package that adds dedicated Enable and DGND pins for shutdown control. Their pinouts differ fundamentally - substitution requires PCB redesign and firmware-level enable logic integration.
OPA2725AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 4.3mA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3.5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2725AIDGKR FAQ
1.How can I place an order for OPA2725AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2725AIDGKR 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 OPA2725AIDGKR reliable?
The price and inventory of OPA2725AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2725AIDGKR is usually 5 days.
3.What payment methods are accepted for OPA2725AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2725AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2725AIDGKR?
OPA2725AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2725AIDGKR 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 OPA2725AIDGKR?
For technical support, including OPA2725AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2725AIDGKR requirements.
6.How does Aetrix verify that OPA2725AIDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2725AIDGKR 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 OPA2725AIDGKR meets industry standards.
7.What is the process for return or replacement of OPA2725AIDGKR?
All OPA2725AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2725AIDGKR, 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 OPA2725AIDGKR part is unused and in its original packaging.
Return procedure for OPA2725AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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