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Texas Instruments OPA726AID
- Part No.:
- OPA726AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA726AID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,615
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Product details
Overview
OPA726AID from Texas Instruments is a single-channel, rail-to-rail output operational amplifier with shutdown control, designed for high-precision, high-speed signal conditioning in 16-bit data acquisition systems. It delivers 20MHz gain-bandwidth, 30V/µs slew rate, 6nV/√Hz input voltage noise at 100kHz, 0.0003% THD+N at 1kHz, and operates from 4V to 12V supply. It drives ADC buffers and transimpedance amplifiers in optical networking and test equipment.
For engineers reviewing the OPA726AID datasheet, OPA726AID pinout, OPA726AID application, or OPA726AID equivalent, key selection criteria include its shutdown-enabled low-power operation (6µA/ch), 150mV rail-to-rail output swing under light load, −40°C to +125°C temperature range, and SO-8 package compatibility with precision analog signal chains requiring fast settling and low distortion.
Technical Context
The OPA726AID uses a proprietary 12V analog CMOS process with a patented output stage enabling 20MHz GBW and 30V/µs slew rate while maintaining <200pA input bias current and 6nV/√Hz noise at 100kHz. Its rail-to-rail output stage employs class AB common-source transistors, achieving 150mV swing from rails into 100kΩ loads with AOL >110dB.
Shutdown functionality is implemented via an Enable pin referenced to DGND, requiring VEN > VDGND +2V to activate and VEN < VDGND +0.8V to disable - supporting direct CMOS logic interfacing in dual-supply configurations without level-shifting. Input common-mode range extends from V− to (V+) −2V, with CMRR >88dB over that full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 20MHz - enables stable unity-gain operation and supports ≥16-bit settling in <450ns for 5V step inputs. |
| Slew Rate | 30V/µs - ensures minimal distortion driving fast 250kSPS ADCs like ADS8342 within 600ns acquisition windows. |
| Input Voltage Noise | 6nV/√Hz at 100kHz - critical for low-noise transimpedance amplification of photodiode signals in optical networking. |
| THD+N | 0.0003% at 1kHz - preserves signal fidelity in high-end audio and active filter applications requiring ultra-low distortion. |
| Quiescent Current | 5.5mA/ch max - balances speed and power in portable instrumentation; drops to 6µA/ch in shutdown mode. |
| Rail-to-Rail Output | Swings to within 150mV of V+ and V− into 100kΩ - maximizes dynamic range in single-supply 4V–12V systems. |
| Supply Range | 4V to 12V (single) or ±2V to ±6V (dual) - supports flexible power architecture in industrial and test equipment. |
Pinout & Package
OPA726AID is packaged in an 8-pin SOIC (SO-8) surface-mount package with standard 1.27mm pitch, rated for −40°C to +125°C operation and RoHS-compliant NIPDAU lead finish (MSL Level-2-260°C-1 year).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Enable) | Shutdown control input | Active-high enable referenced to DGND; asserts shutdown when < VDGND+0.8V, draws ≤5µA when disabled. |
| 2 (V+) | Positive supply rail | Accepts 4V–12V single or +6V max dual supply; bypass with 1nF ceramic + 1µF tantalum. |
| 3 (OUT) | Analog output | Rail-to-rail capable; drives ≥40mA; swings within 150mV of rails into 100kΩ with >110dB open-loop gain. |
| 4 (NC) | No internal connection | Not bonded; must be left unconnected or grounded per layout best practices. |
| 5 (DGND) | Enable reference voltage | Reference point for Enable pin; set between V− and (V+)−2V; connects to logic ground in dual-supply designs. |
| 6 (−IN) | Inverting input | High-impedance FET input (10¹¹Ω || 4pF); accepts common-mode voltages from V− to (V+)−2V. |
| 7 (+IN) | Non-inverting input | Same CMVR and impedance as −IN; used for unity-gain buffer or precision differential configurations. |
| 8 (V−) | Negative supply rail | Supports single-supply (ground) or dual-supply (−2V to −6V); input CMVR includes GND. |
Key Features
| Feature | Design Value |
|---|---|
| Fast 16-bit settling time | 450ns to 0.01% for 5V step - meets timing budget of 250kSPS 16-bit ADCs like ADS8342. |
| Low input bias current | <200pA - minimizes error in high-impedance transimpedance and integrator circuits. |
| Excellent PSRR/CMRR | ≥94dB PSRR and ≥88dB CMRR - rejects supply ripple and common-mode interference in noisy industrial environments. |
| Shutdown mode | Reduces quiescent current to 6µA/ch - enables power gating in battery-powered portable audio and handheld test gear. |
| Rail-to-rail output with GND-inclusive CMVR | Output swings to 150mV of rails; inputs accept V− (including GND) - simplifies single-supply sensor interface design. |
Applications
| Optical Networking Transimpedance Amplifier | A/D Converter Buffer |
|---|---|
Use Scenario: Monitoring optical power in ONET-compliant fiber receivers using a photodiode with 5–10pF junction capacitance. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with 10MΩ feedback resistor and optional CF compensation. Use Value: 6nV/√Hz noise at 100kHz and <200pA bias current preserve SNR across bandwidths up to ~1.5MHz (GBW/2πRFCD). | Use Scenario: Driving the analog input of the ADS8342 16-bit, 250kSPS parallel-output ADC in precision data loggers. IC Role / Device Role / Timing Role: Single-ended buffer isolating ADC input capacitance and charge injection during sample-and-hold acquisition. Use Value: 450ns 0.01% settling ensures full 16-bit accuracy within the ADC's 600ns acquisition window. |
| Active Filter (Butterworth Low-Pass) | Portable Audio Line Driver |
Use Scenario: Implementing a 50kHz four-pole Sallen-Key low-pass filter using dual OPA2725/OPA2726 in precision measurement front-ends. IC Role / Device Role / Timing Role: High-linearity gain stage with 0.0003% THD+N and 20MHz GBW enabling flat group delay and minimal phase distortion. Use Value: 20MHz GBW and 30V/µs slew rate support filter stability and transient response up to 5× cutoff frequency. | Use Scenario: Line-level output driver in battery-powered audio analyzers or portable spectrum monitors. IC Role / Device Role / Timing Role: Rail-to-rail output stage delivering ±2.5V full-scale signal into 600Ω loads with ultra-low distortion. Use Value: 0.0003% THD+N at 1kHz and 150mV rail swing maximize dynamic range and minimize clipping in 3.3V–5V powered systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA725AID | No shutdown function; identical GBW (20MHz), noise (6nV/√Hz), and output swing (150mV). | Lacks enable/disable control; requires external power switching for low-power modes. | Select when shutdown is unnecessary and lowest BOM cost is prioritized. |
| OPA743ID | Lower GBW (7MHz), higher noise (30nV/√Hz at 10kHz), but rail-to-rail input/output and lower IQ (1.3mA). | Better suited for low-power, lower-bandwidth applications like process control sensors. | Select when 7MHz bandwidth suffices and quiescent current <2mA is mandatory. |
Compared with OPA725AID, OPA726AID adds shutdown control without sacrificing speed or noise; compared with OPA743ID, it trades 3× lower IQ for 3× higher GBW and 5× lower noise - making OPA726AID optimal for 16-bit ADC buffering and optical transimpedance where performance outweighs standby power.
Availability
OPA726AID is available at Aetrix Electronics and suitable for optical networking transceivers, high-resolution data acquisition systems, portable test equipment, and precision active filter designs requiring stable component supply across extended temperature ranges.
Supply support for OPA726AID 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 OPA726AID belongs to TI's OPA725/OPA726 series of 12V CMOS op amps, engineered specifically for driving 16-bit ADCs and low-noise transimpedance applications in optical, test, and industrial systems.
FAQ
What is the maximum operating supply voltage for the OPA726AID?
The OPA726AID has an absolute maximum supply voltage rating of +13.2V. Its specified operating range is 4V to 12V for single-supply use or ±2V to ±6V for dual-supply configurations. Operation beyond 12V voids guaranteed specifications and risks permanent damage per TI's Absolute Maximum Ratings table.
Does the OPA726AID support true rail-to-rail input operation?
No, the OPA726AID does not feature rail-to-rail input. Its input common-mode voltage range extends from V− to (V+) −2V, which includes ground in single-supply operation but excludes the positive rail by 2V. This is confirmed in the Electrical Characteristics table under "Common-Mode Voltage Range" and Application Information section.
How does the Enable pin on the OPA726AID interface with standard CMOS logic?
The OPA726AID Enable pin is referenced to the DGND pin. When DGND is tied to logic ground (e.g., in dual-supply ±5V systems), the Enable pin activates with a logic-high signal > +2.8V and shuts down with a signal < +0.8V - directly compatible with 3.3V or 5V CMOS outputs without level-shifting circuitry.
What is the typical output voltage swing for the OPA726AID under 1kΩ load?
Under a 1kΩ resistive load, the OPA726AID output swings to within 250mV of both supply rails while maintaining >106dB open-loop gain, as specified in the Electrical Characteristics table under "Voltage Output Swing from Rail." This is wider than its 150mV swing into 100kΩ loads due to increased output stage loading.
Can the OPA726AID drive capacitive loads without external compensation?
The OPA726AID is unity-gain stable but exhibits increasing overshoot with capacitive loads >20pF. For loads >50pF, TI recommends adding a 10Ω–20Ω series resistor inside the feedback loop (as shown in Figure 3 of SBOS278B) to maintain stability and reduce ringing while preserving DC accuracy.
OPA726AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 1.2 mV
- Current - Supply:
- 4.3mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA726AID FAQ
1.How can I place an order for OPA726AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA726AID 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 OPA726AID reliable?
The price and inventory of OPA726AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA726AID is usually 5 days.
3.What payment methods are accepted for OPA726AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA726AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA726AID?
OPA726AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA726AID 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 OPA726AID?
For technical support, including OPA726AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA726AID requirements.
6.How does Aetrix verify that OPA726AID is sourced from the original manufacturer or authorized distributors?
All OPA726AID 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 OPA726AID meets industry standards.
7.What is the process for return or replacement of OPA726AID?
All OPA726AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA726AID, 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 OPA726AID part is unused and in its original packaging.
Return procedure for OPA726AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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