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Texas Instruments OPA2725AIDGKT
- Part No.:
- OPA2725AIDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2725AIDGKT.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:345
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Product details
Overview
OPA2725AIDGKT 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 - enabling high-fidelity signal conditioning in optical networking transimpedance amplifiers and active filters.
For engineers reviewing the OPA2725AIDGKT datasheet, OPA2725AIDGKT pinout, OPA2725AIDGKT application, or OPA2725AIDGKT equivalent, key selection criteria include its 175mV output swing from rail (RL = 100kΩ), 200pA max input bias current, −40°C to +125°C operating range, MSOP-8 package compatibility, and verified performance in 16-bit settling-critical buffer and I/V conversion roles.
Technical Context
The OPA2725AIDGKT employs a proprietary 12V analog CMOS process with a class AB rail-to-rail output stage, achieving 20MHz GBW and 30V/µs slew rate without phase inversion under overvoltage conditions. Its input stage features FET-based architecture delivering <200pA bias current and 6nV/√Hz noise at 100kHz, supporting low-leakage photodiode interfacing.
Designed for unity-gain stability and wide supply flexibility (±2V to ±6V or +4V to +12V), it maintains >110dB open-loop gain (AOL) at light loads and exhibits excellent ac-coupled rejection: 94dB CMRR and 100dB PSRR at dc, with minimal degradation up to 100kHz - critical for precision active filtering and ADC driver applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 20MHz - enables stable unity-gain buffering of signals up to ~10MHz with ≤0.1% settling error in <450ns. |
| Slew Rate | 30V/µs - supports full-scale 5V step response in ≤167ns, sufficient for 250kSPS 16-bit ADC acquisition windows. |
| Input Voltage Noise | 6nV/√Hz at 100kHz - minimizes noise gain amplification in high-CD photodiode transimpedance configurations. |
| Output Swing | 175mV from rail (RL = 100kΩ) - preserves >96% dynamic range in ±5V or +5V systems when driving 16-bit inputs. |
| Input Bias Current | 200pA max - ensures sub-1µV offset drift in high-impedance I/V converters using ≥10MΩ feedback resistors. |
| THD+N | 0.0003% at 1kHz - meets audio-grade linearity requirements for portable audio and test equipment signal paths. |
| Supply Range | +4V to +12V or ±2V to ±6V - supports single-supply industrial sensors and dual-supply instrumentation without level-shifting. |
Pinout & Package
OPA2725AIDGKT is housed in an 8-pin MSOP (DGK) package with exposed thermal pad, rated for −40°C to +125°C operation and MSL Level-2-260°C-1 year reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive supply rail | Accepts +4V to +12V (single) or +2V to +6V (dual); bypass with 1nF ceramic || 1µF tantalum. |
| 2 - OUT B | Amplifier B output | Rail-to-rail capable; drives capacitive loads up to 20pF stably in G = +1 configuration. |
| 3 - −IN B | Inverting input B | High-impedance FET node; protected by ESD diodes clamped to rails (±0.5V overvoltage tolerance). |
| 4 - +IN B | Non-inverting input B | Common-mode range includes ground; supports single-supply biasing down to V−. |
| 5 - OUT A | Amplifier A output | Independent output; channel separation >120dB at dc ensures minimal crosstalk in dual-channel filters. |
| 6 - −IN A | Inverting input A | Matched to Pin 3; enables matched dual-path signal conditioning without inter-channel gain mismatch. |
| 7 - +IN A | Non-inverting input A | Identical specs to Pin 4; allows differential or parallel processing of two independent analog channels. |
| 8 - V− | Negative supply rail | Accepts 0V (single) or −2V to −6V (dual); referenced for DGND in shutdown variants (not applicable here). |
Key Features
| Feature | Design Value |
|---|---|
| 20MHz GBW + 30V/µs SR | Enables 16-bit settling in <450ns for fast ADC drivers like ADS8342 without external compensation. |
| Rail-to-rail output (175mV from rail) | Maximizes usable signal swing in low-voltage systems (e.g., +5V portable audio), preserving SNR. |
| 6nV/√Hz input voltage noise @ 100kHz | Reduces integrated noise in wideband transimpedance amplifiers where photodiode capacitance dominates gain peaking. |
| CMRR ≥ 88dB over full input range | Maintains accuracy in noisy industrial environments with common-mode interference on sensor inputs. |
| Input bias current < 200pA | Permits use with ultra-high-value feedback resistors (≥10MΩ) in precision I/V conversion without significant offset drift. |
| Specified −40°C to +125°C | Validates performance across automotive under-hood and industrial control temperature extremes. |
Applications
| Optical Networking Transimpedance Amplifier | 16-Bit ADC Driver |
|---|---|
|
Use Scenario: Converting photodiode current to voltage in ONET-compliant optical receivers with 10–100MHz bandwidth requirements. IC Role / Device Role / Timing Role: Dual-channel transimpedance amplifier (TIA) with one amplifier per channel, providing gain, bandwidth, and low-noise signal conditioning before digitization. Use Value: 200pA input bias current prevents DC error accumulation; 6nV/√Hz noise ensures minimal SNR degradation at 100kHz where photodiode capacitance elevates effective noise gain. |
Use Scenario: Buffering and driving the analog input of the ADS8342 16-bit, 250kSPS, 4-channel parallel-output ADC in test equipment. IC Role / Device Role / Timing Role: Single-ended unity-gain buffer that settles to 16-bit accuracy (<450ns) within the ADC's 600ns acquisition window. Use Value: Verified 0.0003% THD+N and 20MHz GBW suppress harmonic distortion and preserve full-scale resolution during fast sampling cycles. |
| Active Low-Pass Filter | Portable Audio Line Driver |
|
Use Scenario: Implementing a four-pole Butterworth Sallen-Key low-pass filter at 50kHz cutoff for anti-aliasing in data acquisition systems. IC Role / Device Role / Timing Role: Dual op-amp performing both gain stages and feedback path conditioning in a compact, thermally matched configuration. Use Value: Matched dual amplifiers ensure identical phase/gain response between channels; rail-to-rail output avoids clipping near supply rails in ±5V designs. |
Use Scenario: Driving 32Ω headphones or line-level inputs in battery-powered audio players with +5V supply. IC Role / Device Role / Timing Role: Low-noise, low-distortion output buffer delivering 2VRMS into 600Ω with <0.0003% THD+N at 1kHz. Use Value: 30V/µs slew rate prevents slew-induced distortion on transient-rich audio waveforms; 5.5mA/ch quiescent current balances performance and battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2726AIDGST | Includes enable/shutdown pin; IQ drops to 6µA/ch in shutdown vs 5.5mA/ch active; same GBW, noise, and output swing. | Required where power cycling or standby modes are needed (e.g., battery-operated instruments); adds complexity with DGND reference pin. | Select OPA2726AIDGST only if system-level power sequencing justifies added pin count and layout overhead. |
| OPA2743IDGKR | 7MHz GBW, 10V/µs SR, 30nV/√Hz noise at 10kHz, RRIO, lower cost; not specified for 16-bit settling or optical TIA use. | Suitable for general-purpose low-noise buffering below 1MHz; insufficient bandwidth/noise performance for 100kHz+ photodiode or fast ADC applications. | Choose OPA2743IDGKR for cost-sensitive, lower-speed signal chains where 20MHz GBW and 6nV/√Hz noise are unnecessary. |
Compared with OPA2726AIDGST, OPA2725AIDGKT offers simpler power management but no shutdown capability; compared with OPA2743IDGKR, it provides 2.8× higher bandwidth, 5× lower noise at 100kHz, and verified 16-bit ADC drive performance - making it the only choice for high-resolution, high-speed precision analog front-ends.
Availability
OPA2725AIDGKT is available at Aetrix Electronics and suitable for optical networking transceivers, 16-bit data acquisition systems, and portable audio line drivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2725AIDGKT 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 OPA2725AIDGKT belongs to TI's OPA725/OPA2725 series - a family of 12V CMOS op amps engineered specifically for 16-bit ADC driving, transimpedance amplification, and high-fidelity active filtering in demanding industrial and communications infrastructure.
FAQ
What is the maximum capacitive load the OPA2725AIDGKT can drive stably in unity-gain configuration?
The OPA2725AIDGKT is characterized for stable operation with up to 20pF capacitive load in unity-gain configuration without external compensation. For larger loads, a 10Ω–20Ω series resistor inside the feedback loop (between output and inverting input) improves phase margin and reduces ringing while maintaining DC accuracy - a technique validated in TI's SBOS278B datasheet Figure 3.
Does the OPA2725AIDGKT support single-supply operation, and what is the minimum recommended supply voltage?
Yes, the OPA2725AIDGKT supports true single-supply operation from +4V to +12V. The absolute minimum supply voltage is +3.5V (per Absolute Maximum Ratings), but full specification compliance - including 20MHz GBW, 30V/µs slew rate, and rail-to-rail output swing - is guaranteed only from +4V onward across −40°C to +125°C.
Is the OPA2725AIDGKT pin-compatible with other devices in the OPA725 family, such as the OPA2726?
No - the OPA2725AIDGKT (MSOP-8, no shutdown) is not pin-compatible with the OPA2726AIDGST (MSOP-10, with enable/DGND pins). The OPA2726 adds two dedicated control pins (Enable and DGND), requiring PCB layout changes. Only SO-8 variants (OPA2725AIDR vs OPA2726AIDR) share pinout, but OPA2725AIDGKT's MSOP-8 footprint has no direct P2P replacement among shutdown variants.
What is the typical input bias current of the OPA2725AIDGKT, and how does it vary with temperature?
The OPA2725AIDGKT has a typical input bias current of 30pA at +25°C, with a maximum of 200pA over −40°C to +125°C. As shown in Figure 7 of SBOS278B, bias current remains <±10pA across most of the common-mode range at +25°C and increases only modestly at temperature extremes - ensuring stable operation in high-impedance transimpedance circuits over full industrial temperature range.
Can the OPA2725AIDGKT be used to drive a 600Ω load at 2VRMS with low distortion?
Yes - the OPA2725AIDGKT delivers 0.0003% THD+N at 1kHz with 2VRMS output into a 600Ω load (per Electrical Characteristics table), meeting professional audio line-driver requirements. Its 30V/µs slew rate prevents slewing distortion on fast transients, and rail-to-rail output ensures full 4Vpp swing from ±2.5V supplies without clipping.
OPA2725AIDGKT 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
OPA2725AIDGKT FAQ
1.How can I place an order for OPA2725AIDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2725AIDGKT 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 OPA2725AIDGKT reliable?
The price and inventory of OPA2725AIDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2725AIDGKT is usually 5 days.
3.What payment methods are accepted for OPA2725AIDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2725AIDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2725AIDGKT?
OPA2725AIDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2725AIDGKT 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 OPA2725AIDGKT?
For technical support, including OPA2725AIDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2725AIDGKT requirements.
6.How does Aetrix verify that OPA2725AIDGKT is sourced from the original manufacturer or authorized distributors?
All OPA2725AIDGKT 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 OPA2725AIDGKT meets industry standards.
7.What is the process for return or replacement of OPA2725AIDGKT?
All OPA2725AIDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2725AIDGKT, 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 OPA2725AIDGKT part is unused and in its original packaging.
Return procedure for OPA2725AIDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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