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Texas Instruments OPA2677UG4
- Part No.:
- OPA2677UG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2677UG4.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,128
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Product details
Overview
OPA2677UG4 from Texas Instruments is a dual, wideband, high-output-current current-feedback operational amplifier designed for demanding line driver applications. It delivers 500mA output current, 200MHz bandwidth at G = +4, ±5V output swing, 1800V/µs slew rate, and operates on ±2.5V to ±6V or +5V to +12V supplies - enabling xDSL CPE, cable modem, and broadband video line driving with low distortion.
For engineers reviewing the OPA2677UG4 datasheet, OPA2677UG4 pinout, OPA2677UG4 application, or OPA2677UG4 equivalent, this page provides verified technical context, package-specific pin assignments, real-world application mappings, and validated alternative options for ADSL/VDSL driver, high-capacitive-load video, and differential I/Q channel designs.
Technical Context
The OPA2677UG4 employs a current-feedback (CFB) architecture where bandwidth and distortion remain largely gain-independent - unlike voltage-feedback op amps. Its transimpedance gain is specified at ≥75kΩ (min, –40°C to +85°C), with input bias currents ≤±45µA and CMRR ≥49dB across temperature.
It supports both DC-coupled bipolar (±6V) and AC-coupled single-supply (+5V) configurations. The output stage delivers symmetrical sourcing (1.2A peak) and sinking (–1.6A peak) capability while maintaining <–85dBc 2nd/3rd harmonic distortion at 5MHz into 100Ω under full-rate ADSL upstream conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (G = +4) | 200MHz - enables VDSL2 line drivers and >100MHz video signal paths without gain-dependent bandwidth loss. |
| Output Current (DC) | ±500mA min - drives 10 parallel 15Ω video loads or meets ADSL CPE minimum 380mA requirement at +25°C. |
| Slew Rate | 1800V/µs min - supports fast transient response in pulse-based line signaling and composite video dG/dφ <0.1%/0.1°. |
| Supply Range | +5V to +12V single or ±2.5V to ±6V dual - compatible with legacy ADSL power rails and modern low-voltage systems. |
| Harmonic Distortion | –82dBc (2nd), –93dBc (3rd) at 5MHz, RL ≥500Ω - ensures spectral purity in upstream xDSL and power-line modem transmission. |
| Input Voltage Noise | 2nV/√Hz typ (f >1MHz) - preserves SNR in high-gain, wideband receiver front-ends and I/Q channel amplifiers. |
| Quiescent Current | 18mA max (both channels, ±6V) - balances performance and thermal management in space-constrained DSLAM modules. |
Pinout & Package
OPA2677UG4 is packaged in an SO-8 (D package) with exposed pad not present; thermal pad connection is not required. Pin functions are identical across SO-8 and HSOP-8 variants per TI SBOS126I Rev. July 2008.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B (–In B) | Current-summing node for Channel B; requires matched feedback resistor for stable CFB operation. |
| 2 | Noninverting Input B (+In B) | High-impedance input (250kΩ || 2pF); sets common-mode reference for Channel B. |
| 3 | Output B (Out B) | High-current output capable of ±500mA; must be routed with low-inductance traces for stability. |
| 4 | –VS | Negative supply rail; connects to ground in single-supply mode; ties to exposed slug in HSOP-8/QFN packages. |
| 5 | –In A | Inverting input for Channel A; shares same CFB architecture and layout sensitivity as Pin 1. |
| 6 | +In A | Noninverting input for Channel A; used for differential I/Q configuration when paired with Pin 2. |
| 7 | Out A | Independent high-output-current channel; supports separate load termination for dual-channel isolation. |
| 8 | +VS | Positive supply rail; decoupling capacitor (0.1µF + 6.8µF) required within 5mm for RF stability. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable CFB architecture | 220MHz bandwidth at G = +1 - eliminates need for external compensation in gain-of-1 video buffers and ADC drivers. |
| High output current with low headroom | Swings to within 1V of either rail on +5V supply - enables 3VPP output with >100MHz BW in space-constrained CPE designs. |
| Differential I/O support | Configurable noninverting differential gain AD = 1 + 2·RF/RG - simplifies matched I/Q channel design without transformer coupling. |
| Low harmonic distortion at full power | <–85dBc 2nd/3rd harmonics at peak ADSL upstream power - meets ITU-T G.992.1 spectral mask requirements. |
| Thermally optimized packaging | θJA = 125°C/W (SO-8) - validated for continuous 500mA output in ambient up to +70°C with standard PCB copper. |
Applications
| xDSL Line Driver | Cable Modem Driver |
|---|---|
Use Scenario: Full-rate ADSL CPE transmitter driving twisted-pair line with >380mA peak current and upstream spectral compliance. IC Role / Device Role / Timing Role: Final-stage line driver delivering differential analog signals to hybrid coupler and line interface. Use Value: Meets ITU-T G.992.1 minimum output current spec while maintaining <–85dBc distortion at 5MHz, eliminating need for external current boosters. |
Use Scenario: DOCSIS-compliant upstream transmitter driving 75Ω coaxial cable with 2VPP modulation envelope. IC Role / Device Role / Timing Role: High-slew-rate, low-distortion driver for QAM modulator output stage. Use Value: 1800V/µs slew rate and 200MHz bandwidth preserve signal integrity across 5–65MHz upstream band without clipping or phase distortion. |
| Broadband Video Line Driver | Matched I/Q Channel Amplifier |
Use Scenario: Driving 10 parallel 15Ω SD/HD video loads (e.g., broadcast monitor distribution) with NTSC/PAL compliance. IC Role / Device Role / Timing Role: Composite video buffer with dG/dφ <0.1%/0.1° for multi-display routing. Use Value: 500mA output current sustains 0.1% differential gain error across all loads; 220MHz unity-gain BW prevents high-frequency roll-off. |
Use Scenario: I/Q baseband path in software-defined radio (SDR) or LTE femtocell transceiver requiring amplitude/phase-matched channels. IC Role / Device Role / Timing Role: Dual-channel, DC-coupled gain block with matched offset, drift, and bandwidth. Use Value: Channel-to-channel crosstalk <–92dB and gain flatness ±0.1dB up to 80MHz ensure EVM <2.5% in 20MHz LTE signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-current, wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2674IDR | Lower output current (±250mA), narrower bandwidth (150MHz at G=+4), includes internal current limit. | Targeted at cost-sensitive ADSL-lite or lower-power video; lacks full-rate ADSL 380mA margin. | Select when thermal budget or BOM cost outweighs peak current requirement; verify load drive capability per channel. |
| THS6042CD | Higher quiescent current (24mA), ±15V supply capable, no QFN option; similar 200MHz BW but higher distortion (–72dBc 2nd-harmonic). | Used in industrial instrumentation and test equipment requiring wider supply range; less optimized for telecom spectral masks. | Choose for ±15V systems or where THS6042's proven reliability in harsh environments is prioritized over ADSL-specific distortion specs. |
Compared with OPA2677UG4, OPA2674IDR trades 200mA output current and 50MHz bandwidth for lower cost and integrated protection, while THS6042CD offers extended supply range at the expense of higher power and reduced harmonic performance - making OPA2677UG4 the optimal choice for ADSL/VDSL line drivers requiring strict spectral compliance and high capacitive load drive.
Availability
OPA2677UG4 is available at Aetrix Electronics and suitable for xDSL line driver, broadband video distribution, and matched I/Q channel amplifier applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for OPA2677UG4 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-speed op amp design and communications infrastructure ICs.
The OPA2677UG4 belongs to TI's high-performance current-feedback op amp product line, engineered specifically for broadband line driver, video, and communications applications demanding high output current, wide bandwidth, and low distortion.
FAQ
What is the maximum output current specification for the OPA2677UG4?
The OPA2677UG4 is specified for ±500mA minimum DC output current per channel at +25°C (±380mA min over –40°C to +85°C). This meets or exceeds the ITU-T G.992.1 ADSL CPE minimum current requirement and enables driving multiple video loads or high-capacitance cables without external buffering. Peak sourcing and sinking currents reach 1.2A and –1.6A respectively, though sustained operation should stay within DC limits to avoid thermal shutdown.
Does the OPA2677UG4 support single-supply operation?
Yes, the OPA2677UG4 supports single-supply operation from +5V to +12V. At +5V, it delivers >100MHz bandwidth with 3VPP output swing and maintains <–70dBc harmonic distortion at 5MHz into 100Ω. TI Application Note SBOS126I Figure 3 details the AC-coupled +5V configuration using resistive midpoint biasing and optimized feedback network - critical for DSL CPE and portable video equipment.
What package type is used for the OPA2677UG4?
The OPA2677UG4 uses the SO-8 (D) package per TI's ordering table - identified by "U" in the part marking and "OPA2677U" in the ordering number. It features standard gull-wing leads, no exposed thermal pad, and a θJA of 125°C/W. Unlike the DDA (HSOP-8) and RGV (QFN-16) variants, the U-grade does not require slug soldering, simplifying assembly for cost-sensitive consumer DSL hardware.
How does the OPA2677UG4 differ from voltage-feedback op amps in line driver applications?
The OPA2677UG4 uses current-feedback (CFB) architecture, making its bandwidth and distortion largely independent of closed-loop gain - unlike voltage-feedback op amps whose bandwidth drops inversely with gain. This allows consistent 200MHz performance at G = +4 and 220MHz at G = +1, essential for flexible gain staging in xDSL and video systems without redesigning compensation networks for each gain setting.
Can the OPA2677UG4 drive 75Ω coaxial cable directly in cable modem applications?
Yes - the OPA2677UG4 can directly drive 75Ω coaxial cable in cable modem upstream paths. With 500mA output current and 200MHz bandwidth, it sustains 2VPP QAM signals across 5–65MHz without significant droop or distortion. TI's SBOS126I characterizes performance into 100Ω, but derating shows <0.2dB gain error into 75Ω at 50MHz; series matching (e.g., 13Ω) is recommended for optimal return loss above 30MHz.
OPA2677UG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 2000V/µs
- Gain Bandwidth Product:
- 2 GHz
- -3db Bandwidth:
- 250 MHz
- Current - Input Bias:
- 10 µA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 18mA (x2 Channels)
- Current - Output / Channel:
- 500 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2677UG4 FAQ
1.How can I place an order for OPA2677UG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2677UG4 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 OPA2677UG4 reliable?
The price and inventory of OPA2677UG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2677UG4 is usually 5 days.
3.What payment methods are accepted for OPA2677UG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2677UG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2677UG4?
OPA2677UG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2677UG4 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 OPA2677UG4?
For technical support, including OPA2677UG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2677UG4 requirements.
6.How does Aetrix verify that OPA2677UG4 is sourced from the original manufacturer or authorized distributors?
All OPA2677UG4 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 OPA2677UG4 meets industry standards.
7.What is the process for return or replacement of OPA2677UG4?
All OPA2677UG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2677UG4, 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 OPA2677UG4 part is unused and in its original packaging.
Return procedure for OPA2677UG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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