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Texas Instruments OPA846IDBVR
- Part No.:
- OPA846IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA846IDBVR.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,055
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Product details
Overview
OPA846IDBVR from Texas Instruments is a wideband, low-noise, voltage-feedback operational amplifier in SOT-23-5 package, delivering 400MHz bandwidth at G = +10, 1.2nV/√Hz input voltage noise, –100dBc 2nd-harmonic distortion at 5MHz, 625V/µs slew rate, and stable operation for gains ≥ +7. It serves as a high-performance ADC preamplifier and transimpedance amplifier in ultrasound, security sensor, and VDSL receiver front ends.
For engineers reviewing the OPA846IDBVR datasheet, OPA846IDBVR pinout, OPA846IDBVR application, or OPA846IDBVR equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and validated alternative options - all grounded in TI's SBOS250E production data sheet and official characterization.
Technical Context
The OPA846IDBVR uses a classical differential input stage followed by two forward-gain stages and a high-power output stage, enabling exceptional linearity (–100dBc HD2 @ 5MHz) and DC accuracy (±150µV VIO). Its voltage-feedback architecture supports standard op amp configurations while maintaining stability down to gain +7.
It achieves 1750MHz gain-bandwidth product with 1.2nV/√Hz input voltage noise and 2.8pA/√Hz input current noise - optimized for wideband transimpedance stages where diode capacitance dominates noise contribution. External compensation enables flat frequency response below minimum stable gain, extending utility in 12–16-bit ADC driver applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (G = +10) | 400MHz - enables full-power signal amplification up to 400MHz without gain roll-off in noninverting configuration. |
| Input Voltage Noise | 1.2nV/√Hz - sets fundamental noise floor for high-sensitivity analog front ends like photodiode transimpedance stages. |
| Slew Rate | 625V/µs - supports fast large-signal settling (10ns to 0.1%) for high-fidelity pulse and video applications. |
| Harmonic Distortion (2nd, 5MHz) | –100dBc @ RL = 500Ω - ensures minimal spectral contamination in RF and communication receivers. |
| Gain Bandwidth Product | 1750MHz - allows design of high-gain (>20×), wideband (>80MHz) amplifiers without sacrificing bandwidth. |
| Stable Gain Minimum | G ≥ +7 - defines lowest closed-loop gain for unconditional stability without external compensation. |
| Supply Current | 12.6mA @ ±5V - balances ultra-high speed performance with moderate power consumption in portable or multi-channel systems. |
Pinout & Package
SOT-23-5 package (DBV), 5-pin surface-mount, 1.6mm × 2.9mm footprint, thermal resistance θJA = 150°C/W. Pin 1 marked by dot; pin orientation per TI DBV package drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +VS | Positive supply rail connection - must be decoupled with 0.1µF ceramic capacitor close to pin. |
| 2 | Inverting Input (–) | Differential input node - high-impedance, matched to noninverting input for common-mode rejection. |
| 3 | Output | High-current, low-impedance output capable of ±60mA drive into 100Ω load with ±3.3V swing. |
| 4 | –VS | Negative supply rail connection - requires symmetrical decoupling to minimize PSRR degradation. |
| 5 | Noninverting Input (+) | Differential input node - used for unity-gain buffer or noninverting gain configurations; bias current ≤ ±0.6µA max. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 1.2nV/√Hz enables sub-picoamp equivalent input noise in transimpedance designs with >10pF photodiode capacitance. |
| High slew rate with low distortion | 625V/µs slew rate combined with –100dBc 2nd-harmonic distortion preserves signal fidelity in wideband video and RF IF stages. |
| Gain-bandwidth optimization | 1750MHz GBP allows flat 140MHz 0.1dB gain flatness at G = +10 - critical for high-resolution ADC driving with minimal group delay variation. |
| DC precision | ±150µV input offset voltage and ±0.4µV/°C drift ensure <±4.1mV total output error in transimpedance circuits over temperature. |
| External compensation support | Enables stable operation below G = +7 using noise-gain shaping - extends usable bandwidth in low-gain inverting configurations (e.g., G = –2 @ 142MHz). |
Applications
| Ultrasound Channel Amplifier | VDSL Line Receiver |
|---|---|
Use Scenario: Amplifying weak, wideband echo signals (1–20MHz) from piezoelectric transducers before digitization in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-noise, high-linearity voltage gain stage with 400MHz bandwidth and <1.2nV/√Hz noise floor to preserve SNR across full imaging bandwidth. Use Value: Enables 12–16-bit ADC sampling without pre-amplifier-induced distortion, directly supporting high-resolution B-mode and Doppler imaging. |
Use Scenario: Receiving asymmetric DSL signals over twisted-pair copper lines with high-frequency content up to 30MHz and strong near-end crosstalk. IC Role / Device Role / Timing Role: Differential receiver front end with >110dB CMRR and –100dBc harmonic suppression to reject common-mode interference and maintain signal integrity. Use Value: Improves bit-error rate (BER) margin by >6dB compared to LMH6624-based receivers due to lower integrated noise and higher SFDR. |
| Security Sensor Front End | High Dynamic Range ADC Preamplifier |
Use Scenario: Conditioning microvolt-level signals from passive infrared (PIR) or microwave Doppler sensors in smart building intrusion detection systems. IC Role / Device Role / Timing Role: Single-supply or dual-supply preamplifier with rail-to-rail output swing and low 12.6mA quiescent current for battery-powered edge nodes. Use Value: Extends sensor node battery life beyond 5 years while maintaining >90dB dynamic range through ultra-low input-referred noise. |
Use Scenario: Driving the input of 14-bit, 100MSPS ADCs in test equipment and communications baseband processing where spurious-free dynamic range (SFDR) is critical. IC Role / Device Role / Timing Role: Precision, high-speed buffer with 10ns 0.1% settling time and <±150µV offset to minimize code-dependent errors and DNL degradation. Use Value: Achieves >92dB SFDR at 5MHz input - 8dB better than OPA686 - enabling accurate spectral analysis in real-time signal analyzers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA847 | Lower input voltage noise (0.85nV/√Hz), higher GBP (3900MHz), but higher supply current (18mA) and unstable below G = +15. | Better for ultra-low-noise transimpedance stages with >50pF detector capacitance; unsuitable for G = +7–+10 fixed-gain ADC drivers. | Select OPA847 only when noise-limited performance dominates power and gain flexibility requirements. |
| LMH6624 | Higher input voltage noise (1.9nV/√Hz), lower GBP (1.5GHz), but stable at unity gain and lower cost. | Acceptable for medium-dynamic-range ADC preamps (<12-bit) or general-purpose wideband gain blocks where distortion <–85dBc suffices. | Choose LMH6624 for cost-sensitive, lower-performance applications where OPA846IDBVR's 1.2nV/√Hz noise and –100dBc distortion are not required. |
Compared with OPA846IDBVR, OPA847 trades higher power and reduced gain flexibility for superior noise and bandwidth, while LMH6624 sacrifices 0.7nV/√Hz noise and 15dB distortion headroom to achieve unity-gain stability and lower BOM cost - making OPA846IDBVR the optimal balance for 12–16-bit, G ≥ +7, wideband precision amplification.
Availability
OPA846IDBVR is available at Aetrix Electronics and suitable for ultrasound channel amplifiers, VDSL line receivers, and high dynamic range ADC preamplifiers requiring stable component supply, traceable sourcing, and long-term industrial lifecycle support.
Supply support for OPA846IDBVR 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 manufacturing.
The OPA846IDBVR belongs to TI's OPA8xx family of ultra-wideband, low-noise voltage-feedback op amps, engineered specifically for high-fidelity signal conditioning in medical imaging, communications infrastructure, and precision test equipment.
FAQ
What is the minimum stable gain for OPA846IDBVR?
The OPA846IDBVR is unconditionally stable for closed-loop gains ≥ +7 in noninverting configuration. At G = +7, it delivers 500MHz bandwidth with <0.5dB peaking. For gains below +7, external compensation (e.g., noise-gain shaping with CS/CF network) is required to maintain stability and flat frequency response - as demonstrated in Figure 5 of TI's SBOS250E datasheet for G = –2 operation.
Does OPA846IDBVR support single-supply operation?
Yes, OPA846IDBVR supports single-supply operation with rail-to-rail output swing capability. When operated from +5V to ground, its common-mode input range extends to within 1.2V of either rail (±3.2V with ±5V supplies), and output swings to ±3.1V into 100Ω. However, optimal distortion and bandwidth performance is achieved with symmetric ±5V supplies, as characterized in the datasheet.
What is the input bias current specification for OPA846IDBVR?
The OPA846IDBVR has a maximum input bias current of –21µA at +85°C (typical –10µA at +25°C), reflecting its bipolar input stage. This value is confirmed in Table 1 of SBOS250E under "Input Bias Current" with VCM = 0V. Designers must account for this in high-impedance transimpedance or precision integrator circuits - e.g., by adding a matched resistor to the noninverting input to cancel offset voltage error.
How does OPA846IDBVR compare to OPA686 in ADC driver applications?
OPA846IDBVR improves upon OPA686 with 400MHz bandwidth (vs. 280MHz), 1.2nV/√Hz input voltage noise (vs. 1.9nV/√Hz), and –100dBc 2nd-harmonic distortion at 5MHz (vs. –88dBc). These enhancements enable >2-bit ENOB improvement in 14-bit, 100MSPS ADC systems - directly supporting TI's stated upgrade path for OPA686 in high-dynamic-range data acquisition.
What decoupling is recommended for OPA846IDBVR's power pins?
TI recommends 0.1µF X7R ceramic capacitors placed within 2mm of each supply pin (+VS and –VS), plus a bulk 6.8µF tantalum or aluminum electrolytic capacitor near the device. The 0.1µF cap must have low ESL/ESR and be mounted directly between the pin and ground plane. Inadequate decoupling causes instability, increased distortion, and degraded PSRR - especially above 10MHz where θJA and package inductance dominate.
OPA846IDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 625V/µs
- Gain Bandwidth Product:
- 1.75 GHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 µA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 12.6mA
- Current - Output / Channel:
- 80 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:
- SOT-23-5
OPA846IDBVR FAQ
1.How can I place an order for OPA846IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA846IDBVR 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 OPA846IDBVR reliable?
The price and inventory of OPA846IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA846IDBVR is usually 5 days.
3.What payment methods are accepted for OPA846IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA846IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA846IDBVR?
OPA846IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA846IDBVR 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 OPA846IDBVR?
For technical support, including OPA846IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA846IDBVR requirements.
6.How does Aetrix verify that OPA846IDBVR is sourced from the original manufacturer or authorized distributors?
All OPA846IDBVR 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 OPA846IDBVR meets industry standards.
7.What is the process for return or replacement of OPA846IDBVR?
All OPA846IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA846IDBVR, 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 OPA846IDBVR part is unused and in its original packaging.
Return procedure for OPA846IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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