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Texas Instruments OPA2677IRGVT
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- Part No.:
- OPA2677IRGVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
OPA2677IRGVT.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,347
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Product details
Overview
OPA2677IRGVT 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 ADSL/VDSL, cable modem, and broadband video driver designs with low distortion and high load drive capability.
For engineers reviewing the OPA2677IRGVT datasheet, OPA2677IRGVT pinout, OPA2677IRGVT application, or OPA2677IRGVT equivalent, this page provides verified technical context, QFN-16 package details, differential I/Q channel implementation guidance, thermal performance data, and validated alternative options for xDSL and high-capacitive-load driver circuits.
Technical Context
The OPA2677IRGVT uses a current-feedback architecture where bandwidth and distortion remain stable across gain settings - unlike voltage-feedback op amps. Its transimpedance gain of 135kΩ (min) and low input impedance (250kΩ || 2pF) enable fast settling and minimal peaking, even with reactive loads up to 100pF.
It features a thermally enhanced QFN-16 package with exposed thermal pad tied to –VS, achieving θJA = 50°C/W when soldered to PCB ground plane. The output stage supports ±500mA continuous current and ±1.6A peak sinking, with < –85dBc harmonic distortion at 5MHz under full-rate ADSL upstream conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (G = +4) | 200MHz - supports VDSL2 line drivers and >100MHz video signal paths without gain-dependent bandwidth roll-off. |
| Output Current | ±500mA min - drives 10 parallel 15Ω video loads or 82.5Ω twisted-pair xDSL lines with >380mA margin at +25°C. |
| Slew Rate | 1800V/µs - enables clean 5VPP large-signal response at 200MHz, critical for ARB waveform fidelity in test equipment. |
| Supply Range | +5V to +12V single or ±2.5V to ±6V dual - compatible with legacy ADSL CPE power rails and modern low-voltage video systems. |
| Harmonic Distortion | –82dBc (2nd), –93dBc (3rd) @ 5MHz, RL ≥ 500Ω - meets stringent NTSC dG/dφ < 0.05%/0.04° and DOCSIS spectral mask requirements. |
| Input Voltage Noise | 2nV/√Hz @ f > 1MHz - preserves SNR in high-gain, wideband receiver front-ends before ADC sampling. |
| Thermal Resistance θJA | 50°C/W (QFN-16, exposed slug soldered) - allows sustained 1W per channel dissipation in compact industrial modules. |
Pinout & Package
OPA2677IRGVT is housed in a 4mm × 4mm, 16-pin QFN package (RGV) with wettable flank leads and an exposed thermal pad that must be connected to –VS for thermal and electrical integrity. Pin 1 is marked by a dot; the thermal pad is electrically tied to pin 7 (–VS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection; leave unconnected or tie to ground for mechanical stability. |
| 2 | –In B | Inverting input of Channel B; high-impedance node requiring matched layout to minimize crosstalk. |
| 3 | +In B | Noninverting input of Channel B; accepts common-mode voltage up to ±4.5V on ±6V supply. |
| 4 | NC | No internal connection; no routing required. |
| 5 | NC | No internal connection; no routing required. |
| 6 | NC | No internal connection; no routing required. |
| 7 | –VS | Negative supply rail; thermal pad must be soldered to this net for thermal management and noise reduction. |
| 8 | NC | No internal connection; no routing required. |
| 9 | Out A | Output of Channel A; capable of ±500mA into 25Ω load with <1% THD+N at 5MHz. |
| 10 | NC | No internal connection; no routing required. |
| 11 | +VS | Positive supply rail; decoupling capacitor (0.1µF + 6.8µF) required within 5mm. |
| 12 | Out B | Output of Channel B; independent channel enables matched I/Q amplification with < –92dB channel-to-channel crosstalk. |
| 13 | NC | No internal connection; no routing required. |
| 14 | +In A | Noninverting input of Channel A; used for single-ended or differential noninverting configurations. |
| 15 | –In A | Inverting input of Channel A; feedback resistor (e.g., 402Ω) sets bandwidth and gain in CFB topology. |
| 16 | NC | No internal connection; no routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Bandwidth remains stable across gains (G = +1 to +8), eliminating re-compensation when adjusting line driver gain. |
| High-output-current stage | Delivers ±500mA continuously - sufficient to drive 82.5Ω xDSL lines at full upstream power without external boost transistors. |
| Low-distortion video drive | Supports 10 parallel 15Ω video loads with <0.05%/0.04° dG/dφ, meeting SMPTE 253M broadcast compliance. |
| Single-supply flexibility | Operates from +5V with 2.4VPP input range and 3VPP output swing - simplifies power design in portable test gear and CPE. |
| Thermally optimized QFN | 50°C/W θJA enables 1W/channel operation in space-constrained DSLAM line cards without forced air cooling. |
Applications
| xDSL Line Driver | Cable Modem Upstream Driver |
|---|---|
Use Scenario: Full-rate ADSL2+ line card driving twisted-pair copper loop up to 3km with >380mA peak current. IC Role / Device Role / Timing Role: Final-stage current-boosting amplifier in differential transmit path, configured as G = +4 noninverting driver. Use Value: Achieves < –85dBc 3rd-harmonic distortion at peak upstream power, satisfying ITU-T G.992.5 spectral mask without post-filtering. |
Use Scenario: DOCSIS 3.0 upstream transmitter driving 75Ω coaxial cable with 64-QAM modulation. IC Role / Device Role / Timing Role: High-linearity, wideband driver for DAC output in RF modulator stage. Use Value: Maintains EVM < 2.5% at 65MHz while delivering 22dBm into 75Ω, enabling 1024-QAM support in next-gen modems. |
| Broadband Video Distribution | Matched I/Q Channel Amplifier |
Use Scenario: Broadcast-grade SDI distribution amplifier feeding 10 parallel 15Ω video monitors over BNC cables. IC Role / Device Role / Timing Role: Dual-channel buffer amplifier with unity-gain configuration and DC-coupled outputs. Use Value: Delivers <0.03% differential gain and <0.01° differential phase error across NTSC/PAL signals, preserving color fidelity. |
Use Scenario: Direct-conversion transceiver baseband path requiring amplitude- and phase-matched I/Q channels. IC Role / Device Role / Timing Role: Dual-channel gain block in quadrature modulator/demodulator, configured for G = +9 differential gain. Use Value: Provides < –92dB channel-to-channel crosstalk and <0.1° inter-channel phase mismatch at 5MHz, minimizing image rejection loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-current, wideband operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2674IDDA | SO-8/HSOP-8 package; lower 350mA output current; 150MHz bandwidth at G = +4; no exposed thermal pad. | Targeted for cost-sensitive ADSL CPE with less aggressive thermal constraints and lower load current demands. | Select when board space permits larger SO-8 footprint and thermal budget allows θJA = 55°C/W. |
| THS6042CD | ±15V capable; 400mA output; 180MHz bandwidth; higher 25mA quiescent current; different pinout and biasing scheme. | Used in legacy telecom infrastructure requiring ±12V rails and higher headroom for analog front-end conditioning. | Choose only if system already uses ±15V supplies and requires >12V output swing - not drop-in compatible. |
Compared with OPA2677IRGVT, OPA2674IDDA offers reduced thermal performance and output drive but lower cost and simpler layout, while THS6042CD supports higher supply voltages at the expense of quiescent power and pin compatibility - making OPA2677IRGVT optimal for space-constrained, high-efficiency xDSL and video line cards.
Availability
OPA2677IRGVT is available at Aetrix Electronics and suitable for xDSL line cards, cable modem upstream transmitters, broadcast video distribution systems, and I/Q modulator designs requiring stable component supply, high-volume traceability, and long-term lifecycle assurance.
Supply support for OPA2677IRGVT 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, embedded processing, and connectivity technologies, with decades of expertise in high-speed amplifier design and broadband communications ICs.
The OPA2677IRGVT belongs to TI's OPA high-speed operational amplifier product line, engineered specifically for high-fidelity, high-current line driver applications in DSL, CATV, video, and test instrumentation systems.
FAQ
What is the maximum capacitive load the OPA2677IRGVT can drive stably?
The OPA2677IRGVT can drive up to 100pF capacitively without oscillation when using the recommended series resistance (RS = 40Ω for CL = 100pF). For larger loads, RS must be increased - e.g., 133Ω for 1000pF - to maintain phase margin. This behavior is documented in Figure 7 of the SBOS126I datasheet, and applies directly to the OPA2677IRGVT in its QFN-16 package with proper PCB layout and decoupling.
Does the OPA2677IRGVT require external current-limiting resistors in xDSL line driver configurations?
No - the OPA2677IRGVT does not include internal current limiting, and TI's reference designs (e.g., TIDA-00217) use external 17.4Ω series resistors for ADSL line protection. The OPA2677IRGVT itself sustains ±500mA continuously and ±1.6A peak sinking, so external resistors are applied for fault protection and impedance matching, not device safety. This is confirmed in the "Single-Supply ADSL CPE Driver" schematic on page 2 of SBOS126I.
Can the OPA2677IRGVT operate from a single +5V supply in video applications?
Yes - the OPA2677IRGVT supports single +5V operation with 2.4VPP input range and 3VPP output swing into 100Ω, as verified in the +5V Electrical Characteristics table (page 4) and Figure 3 of SBOS126I. In video applications, it drives 10 parallel 15Ω loads with <0.05% dG error, meeting SMPTE 253M requirements without level-shifting circuitry.
What is the thermal pad connection requirement for the OPA2677IRGVT QFN package?
The exposed thermal pad on the OPA2677IRGVT (RGV package) must be soldered to the –VS plane - not left floating or tied to ground. This is explicitly stated in the "PIN CONFIGURATIONS" section (page 2) and affects both thermal resistance (θJA drops from 75°C/W to 50°C/W) and output stage stability. Failure to connect the pad to –VS degrades distortion performance and risks thermal shutdown under sustained load.
How does the OPA2677IRGVT compare to the OPA2691 in terms of bandwidth and output current?
The OPA2677IRGVT delivers 200MHz bandwidth at G = +4 and ±500mA output current, whereas the OPA2691 offers 280MHz bandwidth but only ±250mA output current. The OPA2677IRGVT prioritizes drive strength for line termination, while the OPA2691 emphasizes speed for low-current signal conditioning. Both are current-feedback op amps, but the OPA2677IRGVT is specified for ADSL CPE and video load drive - roles where current capability outweighs raw bandwidth.
OPA2677IRGVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 2000V/µs
- Gain Bandwidth Product:
- 220 MHz
- -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:
- 16-VQFN (4x4)
OPA2677IRGVT FAQ
1.How can I place an order for OPA2677IRGVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2677IRGVT 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 OPA2677IRGVT reliable?
The price and inventory of OPA2677IRGVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2677IRGVT is usually 5 days.
3.What payment methods are accepted for OPA2677IRGVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2677IRGVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2677IRGVT?
OPA2677IRGVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2677IRGVT 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 OPA2677IRGVT?
For technical support, including OPA2677IRGVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2677IRGVT requirements.
6.How does Aetrix verify that OPA2677IRGVT is sourced from the original manufacturer or authorized distributors?
All OPA2677IRGVT 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 OPA2677IRGVT meets industry standards.
7.What is the process for return or replacement of OPA2677IRGVT?
All OPA2677IRGVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2677IRGVT, 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 OPA2677IRGVT part is unused and in its original packaging.
Return procedure for OPA2677IRGVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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