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Texas Instruments OPA4658UB
- Part No.:
- OPA4658UB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4658UB.pdf
- Description:
- IC OPAMP CFA 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,162
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Product details
Overview
OPA4658UB from Texas Instruments (formerly Burr-Brown) is a quad ultra-wideband current-feedback operational amplifier optimized for high-resolution video, medical imaging, and high-speed signal processing. It delivers 900MHz gain bandwidth at G = 2, 1700V/µs slew rate, and ultra-low differential gain/phase errors of 0.015%/0.02° into 150Ω, enabling precision NTSC/PAL video amplification and ADC/DAC gain staging.
For engineers reviewing the OPA4658UB datasheet, OPA4658UB pinout, OPA4658UB application, or OPA4658UB equivalent, this page provides verified technical context, SO-14 package mapping, real-world settling time (15.1ns to 0.1%), noise performance (3.2nV/√Hz at 1MHz), and validated alternatives for video, imaging, and communications signal chains.
Technical Context
The OPA4658UB employs a current-feedback architecture with low-impedance inverting input (25Ω) and high-impedance non-inverting input (500kΩ || 1pF), enabling stable operation at gains ≥2 without external compensation. Its open-loop transimpedance ranges from 150kΩ to 360kΩ, supporting wide closed-loop bandwidths-450MHz at G = +2, 195MHz at G = +5, and 130MHz at G = +10-while maintaining <0.015% differential gain error.
Thermal design is supported by θJA = 75°C/W in SO-14 packaging, and it operates across –40°C to +85°C with ±4.5V to ±5.5V supply range. Quiescent current is ±23mA total (all four amplifiers) at ±5V, delivering 50mW per amplifier-critical for multi-channel portable and embedded video systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 900MHz at G = 2 - enables full-spectrum video bandwidth up to 450MHz closed-loop with minimal phase roll-off |
| Slew Rate | 1700V/µs - supports clean 2V step transitions in ≤4.8ns (1% settling), essential for pulse and fast-edge video signals |
| Differential Gain/Phase | 0.015% / 0.02° at NTSC, 1.4Vp-p, 150Ω - meets broadcast-grade video fidelity requirements |
| Input Impedance | Non-inverting: 500kΩ || 1pF; Inverting: 25Ω - enables precise termination matching for 75Ω/100Ω video lines |
| Output Drive | ±2.2V into 100Ω, sourcing 80mA/sinking 60mA - drives coaxial cables and flash ADC inputs directly without buffers |
| Noise Density | 3.2nV/√Hz at 1MHz - preserves SNR in high-gain CCD and medical imaging front-ends |
| Supply Range | ±4.5V to ±5.5V - compatible with standard ±5V analog rails and tolerant of rail sag in dense PCB layouts |
Pinout & Package
OPA4658UB is housed in a 14-pin SOIC (SO-14) surface-mount package with standard 1.27mm pitch, JEDEC MS-012 compliant footprint, and θJA = 75°C/W thermal resistance. Pin 1 is marked with a beveled corner or dot; the device is rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out A) | Amplifier A output | Low-impedance buffer output capable of driving 100Ω loads to ±2.2V |
| 2 (–In A) | Amplifier A inverting input | 25Ω low-Z node - requires matched feedback resistor (e.g., 402Ω) for stability and bandwidth control |
| 3 (+In A) | Amplifier A non-inverting input | 500kΩ || 1pF high-Z input - sensitive to parasitic capacitance; must be routed away from ground/power planes |
| 4 (–VS) | Negative supply rail | Connect to clean –5V with local 0.1µF + 2.2µF decoupling; shared across all four amps |
| 5 (+In B) | Amplifier B non-inverting input | Independent high-Z input for second channel; same layout rules as Pin 3 |
| 6 (–In B) | Amplifier B inverting input | 25Ω low-Z node - use separate 402Ω feedback resistor to avoid crosstalk |
| 7 (Out B) | Amplifier B output | Electrically isolated output; supports independent load termination |
| 8 (NC) | No connect | Not bonded internally - leave unconnected and un-routed |
| 9 (Out C) | Amplifier C output | Third independent output; layout symmetry critical to minimize channel-to-channel isolation degradation (–85dB @ 5MHz) |
| 10 (–In C) | Amplifier C inverting input | 25Ω node - maintain identical trace length and impedance as Pins 2 and 6 |
| 11 (+In C) | Amplifier C non-inverting input | High-Z input - avoid stubs or vias; route over solid ground plane cutout |
| 12 (+VS) | Positive supply rail | Connect to clean +5V with dedicated 0.1µF + 2.2µF decoupling; star-point grounding recommended |
| 13 (+In D) | Amplifier D non-inverting input | Fourth channel input - identical electrical behavior to Pins 3, 5, 11 |
| 14 (–In D) | Amplifier D inverting input | 25Ω node - use individual feedback network to preserve >–74dB three-channel crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Quad current-feedback topology | Four independent amplifiers sharing only supply rails - enables compact multi-channel video routing without inter-channel gain drift |
| G ≥ 2 internal compensation | Stable at unity-gain-equivalent noise gain of 2 (e.g., inverting G = –1) with 66° phase margin - eliminates need for external compensation components |
| Low-power wideband operation | 50mW per amplifier at ±5V - allows four-channel 450MHz video gain blocks in thermally constrained enclosures |
| Video-optimized distortion performance | 66dBc SFDR at 5MHz and 57dBc at 20MHz (G = +2, 2Vp-p) - meets broadcast and medical imaging dynamic range requirements |
| Channel-to-channel isolation | –85dB input-referred crosstalk (channel-to-channel, 5MHz) - preserves signal integrity in RGB or multi-sensor imaging systems |
Applications
| Medical Ultrasound Imaging | HD Video Distribution Amplifier |
|---|---|
Use Scenario: Amplifying weak echo signals from phased-array transducers before digitization in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-noise, wideband gain block for analog beamforming channels with precise amplitude matching. Use Value: 0.015% differential gain error ensures accurate grayscale rendering across full 10-bit dynamic range; 1700V/µs slew rate preserves pulse fidelity in time-of-flight measurements. | Use Scenario: Buffering and distributing 1080p/60Hz HDMI or SDI video signals to multiple monitors or recorders in broadcast trucks. IC Role / Device Role / Timing Role: Quad-channel video driver with matched gain and phase response across RGB or YUV paths. Use Value: –85dB channel isolation prevents color bleeding between channels; 450MHz bandwidth supports full HD pixel clock harmonics without attenuation. |
| CCD Sensor Signal Chain | High-Speed DAC Output Buffer |
Use Scenario: Post-integration amplification of low-voltage, high-bandwidth outputs from scientific CCD arrays used in spectroscopy or astronomy. IC Role / Device Role / Timing Role: Precision gain stage before correlated double sampling (CDS) and ADC conversion. Use Value: 3.2nV/√Hz input voltage noise minimizes added noise floor; 15.1ns 0.1% settling time aligns with sub-microsecond pixel readout timing. | Use Scenario: Driving the current-output pins of high-speed DACs (e.g., 16-bit, 100MSPS) into 75Ω transmission lines for RF waveform generation. IC Role / Device Role / Timing Role: I/V conversion and line-driving buffer with low output impedance (<0.1Ω at DC). Use Value: ±2.2V swing into 100Ω supports 2Vp-p RF carriers; 130MHz bandwidth at G = +10 accommodates third-harmonic suppression in direct-conversion transmitters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6703MQ | Single-channel, 1.8GHz GBW, higher power (90mW), no integrated compensation for G < 2 | Requires external compensation for gains below 2; unsuitable for space-constrained quad-channel designs | Select when single-channel bandwidth >1.5GHz is required and board area permits discrete compensation networks |
| THS3204D | Quad, 1.8GHz GBW, higher quiescent current (120mA total), no specified differential gain/phase data | Lacks published NTSC/PAL video specs; not validated for broadcast imaging applications | Select for general-purpose high-speed signal processing where video fidelity metrics are not mandatory |
Compared with LMH6703MQ and THS3204D, the OPA4658UB uniquely combines quad integration, G ≥ 2 internal stability, broadcast-grade differential gain/phase (0.015%/0.02°), and 50mW/channel power efficiency-making it the only validated choice for compact, low-power, multi-channel video and medical imaging systems requiring guaranteed video fidelity.
Availability
OPA4658UB is available at Aetrix Electronics and suitable for medical imaging equipment, HD video infrastructure, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA4658UB 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 acquired Burr-Brown in 2000 and maintains its precision analog portfolio, emphasizing high-performance op amps for signal integrity-critical applications.
The OPA4658UB belongs to TI's ultra-wideband current-feedback op amp product line, designed specifically for broadcast video, medical ultrasound, and high-speed instrumentation where differential gain/phase accuracy, multi-channel matching, and low power are mandatory.
FAQ
What is the minimum stable gain for the OPA4658UB?
The OPA4658UB is internally compensated for stable operation at non-inverting gains of +2 V/V or greater. An inverting configuration with G = –1 V/V is also stable because it presents a noise gain of 2. The device is not guaranteed stable at unity gain (G = +1) or lower noise gains without external compensation networks.
Does the OPA4658UB support dual-supply operation only, or can it run on single supply?
The OPA4658UB is specified for dual-supply operation from ±4.5V to ±5.5V and does not support true single-supply operation. Its input common-mode range is ±2.9V (typical), and output swing is asymmetric under single-rail biasing. For single-supply applications, consider TI's OPA695 or THS3201, which offer rail-to-rail input/output and explicit single-supply characterization.
What is the recommended feedback resistor value for the OPA4658UB at G = +2?
The datasheet specifies RFB = 402Ω for G = +2 configurations with optimal Butterworth response and 2pF parasitic capacitance. Deviating from 402Ω affects stability: lowering RFB reduces phase margin and may cause peaking, while increasing it rolls off bandwidth. Layout parasitics must be minimized to maintain this nominal performance.
How does the OPA4658UB perform driving capacitive loads like ADC inputs?
The OPA4658UB is optimized for resistive loads (75Ω/100Ω) and becomes unstable with >5pF capacitive loads. To drive flash ADC inputs, place a 5Ω–25Ω series resistor (RISO) between the OPA4658UB output and the capacitive load. This isolates the amplifier from the load capacitance and restores phase margin, as confirmed in Figure 4 of the OPA4658UB datasheet.
Is the OPA4658UB pin-compatible with the OPA2658 or OPA658?
No, the OPA4658UB (quad, SO-14) is not pin-compatible with the OPA2658 (dual, SO-8) or OPA658 (single, SO-8). Each variant has distinct pin counts, pin functions, and package footprints. Interchange requires PCB redesign. However, all three share identical electrical specifications and current-feedback architecture, enabling consistent system-level design across channel counts.
OPA4658UB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 1700V/µs
- Gain Bandwidth Product:
- 900 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.1 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 19mA (x4 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 22 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4658UB FAQ
1.How can I place an order for OPA4658UB through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4658UB 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 OPA4658UB reliable?
The price and inventory of OPA4658UB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4658UB is usually 5 days.
3.What payment methods are accepted for OPA4658UB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4658UB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4658UB?
OPA4658UB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4658UB 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 OPA4658UB?
For technical support, including OPA4658UB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4658UB requirements.
6.How does Aetrix verify that OPA4658UB is sourced from the original manufacturer or authorized distributors?
All OPA4658UB 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 OPA4658UB meets industry standards.
7.What is the process for return or replacement of OPA4658UB?
All OPA4658UB units undergo pre-shipment inspection (PSI). If there is an issue with OPA4658UB, 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 OPA4658UB part is unused and in its original packaging.
Return procedure for OPA4658UB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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