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Texas Instruments OPA659IDBVR
- Part No.:
- OPA659IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA659IDBVR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,400
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Product details
Overview
OPA659IDBVR from Texas Instruments is a unity-gain stable, wideband JFET-input operational amplifier optimized for high-impedance photodiode transimpedance amplification and oscilloscope front-end buffering. It delivers 650 MHz small-signal bandwidth (G = 1 V/V), 2550 V/μs slew rate, and 8.9 nV/√Hz input voltage noise - enabling sub-ns pulse fidelity in wafer inspection and optical time-domain reflectometry (OTDR) systems.
For engineers reviewing the OPA659IDBVR datasheet, OPA659IDBVR pinout, OPA659IDBVR application, or OPA659IDBVR equivalent, key selection criteria include transimpedance stability with photodiode capacitance up to 100 pF, ±10 pA max input bias current at 25°C, fast 8 ns settling time to 1%, and SOT-23-5 package compatibility with high-density analog front-ends.
Technical Context
The OPA659IDBVR employs a voltage-feedback architecture with a JFET input stage, achieving unity-gain stability without external compensation. Its 350 MHz gain-bandwidth product supports broadband transimpedance configurations while maintaining low distortion (–78 dBc THD at 10 MHz) and fast overdrive recovery (8 ns).
Designed for split-supply operation (±3.5 V to ±6.5 V), it maintains symmetrical ±4.8 V output swing into 100 Ω at ±6 V supplies and exhibits 70 mA output drive capability. Input common-mode range extends to ±3.37 V, supporting rail-to-rail signal handling in high-fidelity acquisition paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 650 MHz at G = 1 V/V - enables full-spectrum fidelity for 500+ MHz analog signals without gain peaking. |
| Slew Rate | 2550 V/μs - preserves edge integrity of <5 ns rise-time pulses in TOF sensing and OTDR burst detection. |
| Input Voltage Noise | 8.9 nV/√Hz - minimizes integrated noise in high-Z transimpedance stages with feedback resistors ≥10 kΩ. |
| Input Bias Current | ±10 pA (max, TA = 25°C) - ensures minimal DC error when interfacing with high-impedance photodiodes (e.g., >1 GΩ shunt resistance). |
| Settling Time (1%) | 8 ns for 4-V step - guarantees accurate sampling of fast transient events in oscilloscope input amplifiers. |
| THD @ 10 MHz | –78 dBc - meets spectral purity requirements for high-resolution digitization in test equipment front-ends. |
| Output Drive | ±70 mA - drives 50 Ω transmission lines directly without external buffers in compact probe designs. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, thermally enhanced with exposed pad (not electrically connected in DBV variant). Pin 1 = NC (no connection); Pin 2 = –VS; Pin 3 = VIN+; Pin 4 = VIN–; Pin 5 = +VS. Output is internal to amplifier core and not assigned to a dedicated pin - device operates only in closed-loop configurations with external feedback network.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No Connection | Internally unconnected; must be left floating or tied to ground per layout best practice - no electrical function. |
| Pin 2 (–VS) | Negative Power Supply | Accepts –3.5 V to –6.5 V supply; requires local 0.1 μF ceramic bypass to ground for high-frequency PSRR stability. |
| Pin 3 (VIN+) | Noninverting Input | High-impedance JFET node (10¹² Ω || 1 pF); sensitive to PCB leakage - guard ring recommended in photodiode applications. |
| Pin 4 (VIN–) | Inverting Input | Primary feedback node in transimpedance configuration; connects directly to photodiode cathode and RF resistor. |
| Pin 5 (+VS) | Positive Power Supply | Accepts +3.5 V to +6.5 V supply; pairs with Pin 2 for symmetrical ±6 V operation in lab-grade instrumentation. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-Gain Stable Architecture | Guarantees stable closed-loop operation down to G = 1 V/V without external compensation components - simplifies layout in space-constrained optical modules. |
| Low Input Bias Current | ±10 pA maximum at 25°C - reduces dark-current-induced offset drift in photodiode amplifiers operating at ambient temperature. |
| Fast Overdrive Recovery | 8 ns recovery from saturation - prevents pulse pile-up errors in high-repetition-rate laser detection (e.g., >100 MHz burst modes). |
| High Output Current | ±70 mA drive capability - eliminates need for external output buffers when driving 50 Ω coaxial cables in oscilloscope input stages. |
| Low Input Voltage Noise | 8.9 nV/√Hz - enables sub-picoamp photocurrent resolution in transimpedance gains up to 10⁶ V/A with 100 pF diode capacitance. |
Applications
| Optical Time-Domain Reflectometry (OTDR) | Wafer Scanning Equipment |
|---|---|
Use Scenario: Detecting backscattered light pulses from fiber-optic faults with nanosecond timing resolution. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photodiode current to voltage with minimal group delay and overshoot. Use Value: 650 MHz bandwidth and 8 ns settling enable ≤1 m spatial fault resolution in single-mode fiber testing. |
Use Scenario: Real-time capture of reflected laser signals during semiconductor wafer surface inspection. IC Role / Device Role / Timing Role: High-speed, low-noise front-end buffer amplifying photodiode outputs before ADC sampling. Use Value: 8.9 nV/√Hz noise and ±10 pA bias current preserve SNR across multi-GHz modulation bandwidths used in defect mapping. |
| Oscilloscope Input Amplifier | High-Speed Time-of-Flight (TOF) Sensing |
Use Scenario: Signal conditioning path for passive probes in 500+ MHz bandwidth digital storage oscilloscopes. IC Role / Device Role / Timing Role: Unity-gain stable buffer isolating probe tip from ADC input while preserving signal integrity. Use Value: 2550 V/μs slew rate and 650 MHz flat bandwidth ensure accurate reproduction of fast edges without slew-induced distortion. |
Use Scenario: Converting photocurrent from pulsed laser diodes into precise timing voltages for distance measurement. IC Role / Device Role / Timing Role: Low-jitter transimpedance stage feeding time-to-digital converter (TDC) inputs. Use Value: 8 ns settling and –78 dBc THD minimize time-walk error in sub-centimeter TOF accuracy systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA656IDBVR | Lower 230 MHz bandwidth, 290 V/μs slew rate, 7 nV/√Hz noise, ±5 V supply max. | Better quiescent current efficiency (13.5 mA vs 32 mA), suited for portable or battery-powered instruments. | Select OPA656IDBVR when bandwidth demand is ≤250 MHz and power budget is constrained; not suitable for 650 MHz OTDR pulse fidelity. |
| OPA657UB | Higher 1600 MHz GBP but gain-stable only at G ≥ +7; 4.8 nV/√Hz noise; 700 V/μs slew rate. | Requires minimum gain of +7 - incompatible with unity-gain transimpedance or buffer configurations. | Choose OPA657UB only for fixed-gain ≥+7 signal chains where ultra-low noise dominates over flexibility; OPA659IDBVR remains preferred for G = 1–2 photodiode interfaces. |
Compared with OPA656IDBVR and OPA657UB, the OPA659IDBVR uniquely balances unity-gain stability, 650 MHz bandwidth, and photodiode-optimized input characteristics - making it the only direct fit for high-precision, low-capacitance transimpedance applications requiring sub-ns timing fidelity without gain constraints.
Availability
OPA659IDBVR is available at Aetrix Electronics and suitable for optical time-domain reflectometry (OTDR), wafer scanning equipment, and oscilloscope input amplifiers requiring stable component supply, traceable lot control, and long-term production continuity.
Supply support for OPA659IDBVR 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 company specializing in analog and embedded processing technologies, with leadership in high-performance op-amps, data converters, and signal chain solutions.
The OPA659IDBVR belongs to TI's precision high-speed operational amplifier product line, engineered specifically for optical front-end and test-and-measurement applications demanding ultra-low noise, high input impedance, and guaranteed unity-gain stability.
FAQ
What is the maximum photodiode capacitance supported by OPA659IDBVR in transimpedance mode?
The OPA659IDBVR maintains stable transimpedance response with photodiode capacitances up to 100 pF when paired with appropriate feedback resistor values and optional RISO compensation. Figure 31 in the SBOS342C datasheet shows flat transimpedance gain up to 100 MHz with CD = 100 pF and RF = 1 MΩ, confirming suitability for high-capacitance avalanche photodiodes used in OTDR systems. OPA659IDBVR achieves this via its 350 MHz gain-bandwidth product and optimized internal compensation.
Does OPA659IDBVR require external compensation for unity-gain stability?
No, the OPA659IDBVR is internally compensated for unity-gain stability and operates reliably with G = 1 V/V without any external compensation components. This is confirmed in Section 8.1 ("Overview") and Section 9.1.1 of the SBOS342C datasheet. The device's voltage-feedback architecture and JFET input stage are co-designed to ensure phase margin >45° at G = 1, eliminating the need for external capacitors or resistors in standard noninverting or transimpedance configurations - a key advantage over alternatives like OPA657UB.
What is the recommended power supply configuration for OPA659IDBVR in oscilloscope front-end designs?
For oscilloscope front-end applications, the OPA659IDBVR is recommended in ±6 V split-supply configuration (Pin 2 = –6 V, Pin 5 = +6 V), enabling symmetrical ±4.8 V output swing into 100 Ω and optimal common-mode rejection. This matches standard lab equipment grounding and avoids level-shifting complexity. Section 8.3.1 of SBOS342C explicitly states split-supply operation is preferred for ground-referenced signal paths - exactly matching oscilloscope input amplifier requirements. OPA659IDBVR delivers full 650 MHz bandwidth and 2550 V/μs slew rate under these conditions.
How does OPA659IDBVR handle input overdrive and recovery in TOF sensing?
The OPA659IDBVR recovers from input overdrive in 8 ns (Section 7.5, "Electrical Characteristics"), a critical parameter for high-repetition-rate time-of-flight sensing where successive laser pulses may saturate the input stage. This fast recovery is enabled by its JFET input architecture and internal clamping design, preventing pulse-to-pulse distortion and ensuring consistent timing accuracy across bursts. Figure 20 and Figure 21 in SBOS342C validate 8 ns recovery at G = ±2 V/V - performance retained in the OPA659IDBVR SOT-23-5 variant per Device Information table.
Can OPA659IDBVR be used in single-supply applications?
Yes, the OPA659IDBVR supports single-supply operation from 7 V to 13 V (Section 7.3, "Recommended Operating Conditions"), provided input and output signals remain within the linear common-mode range (±3.37 V at TA = 85°C). Section 8.3.2 clarifies that no performance degradation occurs - bandwidth, slew rate, and noise remain identical to split-supply operation. However, careful DC biasing of VIN+ and feedback network is required to center the output swing; OPA659IDBVR does not include rail-to-rail input or output stages.
OPA659IDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2550V/µs
- Gain Bandwidth Product:
- 350 MHz
- -3db Bandwidth:
- 650 MHz
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 32mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 13 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA659IDBVR FAQ
1.How can I place an order for OPA659IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA659IDBVR 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 OPA659IDBVR reliable?
The price and inventory of OPA659IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA659IDBVR is usually 5 days.
3.What payment methods are accepted for OPA659IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA659IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA659IDBVR?
OPA659IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA659IDBVR 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 OPA659IDBVR?
For technical support, including OPA659IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA659IDBVR requirements.
6.How does Aetrix verify that OPA659IDBVR is sourced from the original manufacturer or authorized distributors?
All OPA659IDBVR 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 OPA659IDBVR meets industry standards.
7.What is the process for return or replacement of OPA659IDBVR?
All OPA659IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA659IDBVR, 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 OPA659IDBVR part is unused and in its original packaging.
Return procedure for OPA659IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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