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Texas Instruments OPA653IDRBT
- Part No.:
- OPA653IDRBT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
OPA653IDRBT.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,337
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Product details
Overview
OPA653IDRBT from Texas Instruments is a wideband, fixed-gain, JFET-input voltage-feedback operational amplifier optimized for +2 V/V noninverting or –1 V/V inverting configurations. It delivers 500 MHz small-signal bandwidth, 2675 V/μs slew rate, and –72 dBc 2nd-harmonic distortion at 10 MHz into 100 Ω - enabling high-fidelity pulse acquisition in oscilloscope front-ends and high-impedance probe interfaces.
For engineers reviewing the OPA653IDRBT datasheet, OPA653IDRBT pinout, OPA653IDRBT application, or OPA653IDRBT equivalent, this page provides verified electrical parameters, VSON-8 package terminal mapping, real-world test-environment configurations (50-Ω source/load), and validated alternative options for fixed-gain, low-noise, high-speed amplification.
Technical Context
The OPA653IDRBT integrates precision internal gain-setting resistors (RG = RF = 160 Ω) to fix noise gain at +2 V/V, eliminating external resistor selection while ensuring optimal phase margin and stability in noninverting mode. Its JFET input delivers 10¹² Ω input impedance with only 10 pA bias current at +25°C, supporting high-Z sensor and probe interfaces without signal loading.
It operates from ±3.5 V to ±6.5 V supplies, draws 32 mA quiescent current, and achieves 7.9 ns settling time to 1% on a 4-V step. The device is internally compensated for unity-gain-stable operation but optimized for fixed +2 V/V noise gain - requiring RISO isolation (e.g., 10–46 Ω) when driving >5 pF capacitive loads to maintain flat frequency response and minimal overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 500 MHz at G = +2 V/V, RL = 100 Ω - supports full-bandwidth digitization of fast transients up to UHF. |
| Slew Rate | 2675 V/μs on 4-V step - preserves edge fidelity in pulse-amplifier and time-domain measurement circuits. |
| Input Voltage Noise | 6.1 nV/√Hz above 100 kHz - enables low-noise amplification of weak signals from high-impedance sources. |
| Harmonic Distortion | –72 dBc (2nd) at 10 MHz, VO = 2 VPP - meets spectral purity requirements for FFT-based signal analysis. |
| Output Current | ±70 mA at +25°C - drives 50-Ω transmission lines or 100-Ω ADC inputs directly without buffer stages. |
| Supply Voltage Range | ±3.5 V to ±6.5 V - compatible with standard ±5 V and ±6 V lab/system rails; ±6 V recommended for best THD. |
| Input Bias Current | ±10 pA at +25°C - minimizes DC error in high-Z feedback networks and passive probe attenuation paths. |
Pinout & Package
VSON-8 (DRB) package: 2.0 mm × 2.0 mm, 0.5 mm pitch, exposed thermal pad (PowerPAD™). Pin 1 marked by dot; top-side marking "OBEI". Thermal resistance θJA = 55°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS+) | Positive supply rail | Connect to +VS via low-inductance 0.1-μF ceramic capacitor; shared single-point ground for decoupling caps. |
| 2 (VOUT) | Amplifier output | Route with minimal trace length; add series RISO (10–46 Ω) close to pin when driving >5 pF load. |
| 3 (VIN−) | Inverting input | Highest sensitivity to parasitic capacitance; place feedback resistor (160 Ω internal) termination as close as possible. |
| 4 (VS−) | Negative supply rail | Connect to –VS via separate 0.1-μF ceramic capacitor; avoid shared traces with VS+ or signal paths. |
| 5 (NC) | No connection | Not bonded; leave unconnected and un-routed; do not tie to ground or supply. |
| 6 (NC) | No connection | Not bonded; electrically isolated; no PCB trace or copper pour required. |
| 7 (VIN+) | Noninverting input | Terminate to ground with 49.9 Ω in 50-Ω test setups; avoid >2.4 kΩ source impedance to prevent added Johnson noise. |
| 8 (NC) | No connection | Not bonded; floating; ensure no solder mask bridge or accidental short. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +2 V/V or –1 V/V gain | Internal 160 Ω RF/RG resistors eliminate external component count and layout variability in high-frequency designs. |
| 500 MHz bandwidth at G = +2 | Enables accurate reproduction of sub-2 ns rise-time signals without gain peaking or group delay distortion. |
| 6.1 nV/√Hz input voltage noise | Preserves SNR when amplifying mV-level signals from passive probes or piezoelectric sensors. |
| Fast overdrive recovery (8 ns) | Resumes linear operation within 8 ns after clipping - critical for pulse train integrity in data acquisition. |
| JFET input (10¹² Ω || 2.5 pF) | Minimizes loading on high-impedance sources such as 10× oscilloscope probes and photodiode transimpedance nodes. |
Applications
| Oscilloscope Front-End Amplifier | High-Impedance Passive Probe Interface |
|---|---|
Use Scenario: Amplifying attenuated signals from 10× passive probes before digitization in benchtop or portable oscilloscopes. IC Role / Device Role / Timing Role: Fixed-gain +2 V/V noninverting amplifier providing broadband signal conditioning with minimal group delay variation. Use Value: Maintains flat 500 MHz bandwidth and –72 dBc THD at 10 MHz, preserving waveform fidelity across full analog bandwidth. |
Use Scenario: Buffering and gain restoration in 100-MHz+ passive probe tip assemblies with 10 MΩ input impedance. IC Role / Device Role / Timing Role: High-Z input stage with ultra-low bias current (±10 pA) and 10¹² Ω input resistance. Use Value: Prevents probe attenuation error drift caused by input leakage; enables stable DC offset control in calibrated probe systems. |
| Data Acquisition Card Signal Chain | ADC Driver for Wideband Sampling |
Use Scenario: Conditioning analog inputs in modular DAQ cards used for RF test, vibration analysis, or transient capture. IC Role / Device Role / Timing Role: Low-noise, fast-settling (+2 V/V) amplifier preceding 12–14-bit, 100+ MSPS ADCs. Use Value: 7.9 ns settling to 1% ensures accurate sampling of multi-cycle transients without aperture uncertainty penalty. |
Use Scenario: Driving differential or single-ended ADC inputs in spectrum analyzers and software-defined radios. IC Role / Device Role / Timing Role: Output stage delivering ±3.6 V swing into 100 Ω with 2675 V/μs slew rate and low THD. Use Value: Supports full-scale 2-VPP ADC inputs at Nyquist frequencies up to 50 MHz without harmonic folding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-gain, high-bandwidth amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA656IDBVR | Same JFET input, ±5 V supply, 500 MHz BW, but unity-gain stable; requires external gain resistors. | Supports variable gain (≥1 V/V); less suitable for space-constrained +2 V/V probe designs where internal resistors reduce BOM count. | Choose OPA656IDBVR when gain flexibility or lower supply voltage (±5 V) is required; OPA653IDRBT preferred for fixed +2 V/V miniaturized front-ends. |
| OPA657UB | Higher 350 MHz BW at G = +7 V/V; 4.8 nV/√Hz noise; ±5 V supply; no internal resistors. | Optimized for higher closed-loop gain; lacks integrated +2 V/V configuration; requires external feedback network. | Choose OPA657UB for applications needing >200 MHz bandwidth at G ≥ +7; OPA653IDRBT remains optimal for compact +2 V/V probe or scope channel designs. |
Compared with OPA656IDBVR and OPA657UB, the OPA653IDRBT uniquely combines factory-trimmed +2 V/V gain, 500 MHz bandwidth, and VSON-8 packaging - reducing layout complexity and component count in high-density, high-speed analog signal chains where fixed gain suffices.
Availability
OPA653IDRBT is available at Aetrix Electronics and suitable for oscilloscope front-end modules, high-impedance probe assemblies, and wideband data acquisition cards requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for OPA653IDRBT 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 heritage in precision op amps and high-speed signal chain solutions.
The OPA653IDRBT belongs to TI's OPA high-speed amplifier product line, designed specifically for ultra-wideband, low-distortion, fixed-gain applications in test equipment, instrumentation, and high-fidelity data acquisition systems.
FAQ
What is the maximum recommended supply voltage for OPA653IDRBT?
The absolute maximum supply voltage for OPA653IDRBT is ±6.5 V, but the datasheet specifies optimal performance at ±6 V - including lowest harmonic distortion (–72 dBc at 10 MHz) and full 500 MHz bandwidth. Operation at ±3.5 V is functional but reduces slew rate and bandwidth; always use 0.1-μF ceramic decoupling capacitors at both VS+ and VS− pins.
Does OPA653IDRBT support inverting gain configuration?
Yes, OPA653IDRBT supports inverting gain of –1 V/V using its internal 160 Ω resistors, with VIN− as input and VIN+ terminated to ground. However, the noise gain becomes +1.84 V/V due to 72.3 Ω input termination in 50-Ω test setups, causing slight peaking; for best stability, drive VIN− from a near-0-Ω source like another op amp.
What is the purpose of the NC pins on OPA653IDRBT?
OPA653IDRBT has three NC (no-connect) pins (5, 6, and 8) in its VSON-8 DRB package. These pins are not bonded to die circuitry and must remain unconnected - no routing, grounding, or supply ties. Leaving them floating avoids parasitic coupling; ensure no solder mask bridges or copper pour overlaps during PCB layout.
How should I stabilize OPA653IDRBT when driving capacitive loads?
For capacitive loads >5 pF, add a series output resistor (RISO) between OPA653IDRBT's VOUT pin and the load. Recommended values range from 10 Ω (for ≤5 pF) to 46 Ω (for 100 pF), per Figure 17 in the datasheet. Place RISO as close as possible to the VOUT pin to isolate the load capacitance from the feedback loop and restore phase margin.
Is OPA653IDRBT suitable for driving 50-Ω transmission lines directly?
Yes - OPA653IDRBT delivers ±70 mA output current and is characterized into 100 Ω loads, making it capable of driving 50-Ω lines with proper termination. Use a 49.9 Ω series resistor at VOUT (as shown in Figure 21) to match the line and prevent reflections; ensure the destination is also 50-Ω terminated to avoid standing waves and distortion.
OPA653IDRBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2675V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 500 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:
- 8-SON (3x3)
OPA653IDRBT FAQ
1.How can I place an order for OPA653IDRBT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA653IDRBT 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 OPA653IDRBT reliable?
The price and inventory of OPA653IDRBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA653IDRBT is usually 5 days.
3.What payment methods are accepted for OPA653IDRBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA653IDRBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA653IDRBT?
OPA653IDRBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA653IDRBT 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 OPA653IDRBT?
For technical support, including OPA653IDRBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA653IDRBT requirements.
6.How does Aetrix verify that OPA653IDRBT is sourced from the original manufacturer or authorized distributors?
All OPA653IDRBT 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 OPA653IDRBT meets industry standards.
7.What is the process for return or replacement of OPA653IDRBT?
All OPA653IDRBT units undergo pre-shipment inspection (PSI). If there is an issue with OPA653IDRBT, 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 OPA653IDRBT part is unused and in its original packaging.
Return procedure for OPA653IDRBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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