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Texas Instruments THS4271DRBR
- Part No.:
- THS4271DRBR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
THS4271DRBR.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,758
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Product details
Overview
THS4271DRBR from Texas Instruments is a low-noise, high-slew-rate, unity-gain-stable voltage-feedback amplifier optimized for wideband signal conditioning in ±5 V or single 5 V supply systems. It delivers 1.4 GHz small-signal bandwidth, 1000 V/μs slew rate, –92 dBc THD at 30 MHz, 3 nV/√Hz input voltage noise, and drives 150 Ω loads with 2 VPP output swing - enabling high-fidelity ADC preamplification and RF receiver front-ends.
For engineers reviewing the THS4271DRBR datasheet, THS4271DRBR pinout, THS4271DRBR application, or THS4271DRBR equivalent, this page provides verified specifications, validated pin functions, real-world use cases in high-linearity analog signal chains, and confirmed alternative options for design flexibility under thermal and distortion constraints.
Technical Context
The THS4271DRBR employs a voltage-feedback architecture with internal compensation ensuring stability at unity gain - eliminating need for external compensation networks. Its high slew rate and low distortion stem from optimized transconductance stages and low-impedance output drive capable of sourcing 160 mA and sinking 80 mA into 10 Ω loads.
Thermal management is critical: oscillation may occur above +60°C junction temperature, requiring PCB-level thermal design with PowerPAD™ connection to ground plane. Input common-mode range extends to ±3.5 V (±5 V supply), and PSRR exceeds 70 dB across both supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 1.4 GHz at G = 1, RL = 150 Ω - supports baseband-to-UHF signal amplification without gain peaking. |
| Slew rate | 1000 V/μs at G = –1 - enables clean 2 V step response in <25 ns, critical for fast-settling data acquisition. |
| THD @ 30 MHz | –92 dBc at VO = 1 VPP, RL = 150 Ω - preserves spectral purity in wideband communications receivers. |
| Input voltage noise | 3 nV/√Hz at f = 1 MHz - minimizes added noise floor in low-amplitude sensor or DAC buffer applications. |
| Supply voltage range | ±2.5 V to ±5 V dual or 5 V to 10 V single - compatible with legacy ±5 V systems and modern low-voltage signal chains. |
| Output current | ±160 mA sourcing/sinking capability into 10 Ω - drives heavy capacitive or resistive loads without gain compression. |
| Quiescent current | 22–28 mA max - balances performance and power in high-speed analog modules where thermal density matters. |
Pinout & Package
THS4271DRBR uses an 8-pin leadless MSOP package with PowerPAD™ (DRB), requiring soldering of the exposed thermal pad to a PCB ground plane for reliable thermal dissipation and oscillation prevention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No internal connection | Must be left unconnected or tied to ground per layout guidelines; no electrical function. |
| 2 IN− | Inverting input | Differential input node; high-impedance (5 MΩ) with 0.8 pF differential capacitance. |
| 3 IN+ | Non-inverting input | Differential input node; matched to IN− for optimal CMRR (>65 dB) and low offset drift. |
| 4 VS− | Negative supply rail | Connects to –5 V (or GND in single-supply); decoupling capacitor required within 1 cm. |
| 5 NC | No internal connection | Must be left unconnected; not bonded internally. |
| 6 VS+ | Positive supply rail | Connects to +5 V (or 5 V in single-supply); requires local 0.1 μF ceramic decoupling. |
| 7 VOUT | Amplified output | Low-impedance (0.1 Ω) output capable of driving 150 Ω loads with <0.01% settling error in 38 ns. |
| 8 NC | No internal connection | Exposed PowerPAD™ thermal pad - must be soldered to solid copper pour for thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Internally compensated for stable operation at G = 1 without external components - reduces BOM count and layout risk. |
| Low distortion at high frequency | –92 dBc THD at 30 MHz ensures minimal harmonic generation in IF/RF signal paths and video reconstruction filters. |
| PowerPAD™ thermal enhancement | θJA = 45.8°C/W enables sustained 28 mA quiescent current operation without exceeding +60°C die limit. |
| High output drive strength | 160 mA sourcing into 10 Ω allows direct interface to 75 Ω/150 Ω transmission lines without external buffers. |
| Wide supply flexibility | Operates from ±2.5 V to ±5 V or 5 V to 10 V - supports both legacy industrial and modern low-power embedded designs. |
Applications
| High Linearity ADC Preamplifier | Wireless Communication Receivers |
|---|---|
Use Scenario: Driving the input of a 14-bit, 105 MSPS ADC in a software-defined radio front-end with 70 MHz IF signal. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate gain stage providing 2× differential-to-single-ended conversion and anti-alias filtering interface. Use Value: 3 nV/√Hz input noise and –92 dBc THD preserve ENOB >12.5 bits at 30 MHz, directly enabling high-dynamic-range digitization. | Use Scenario: IF amplifier in a cellular base station receiver operating at 190–220 MHz with 20 MHz channel bandwidth. IC Role / Device Role / Timing Role: Wideband gain block after downconversion, delivering flat 1.4 GHz bandwidth and high OIP3 (35 dBm). Use Value: 35 dBm third-order output intercept ensures robust linearity against adjacent-channel interference in multi-carrier LTE deployments. |
| Differential to Single-Ended Conversion | DAC Output Buffer |
Use Scenario: Converting balanced I/Q outputs from a quadrature modulator to single-ended signals for RF power amplifier input matching. IC Role / Device Role / Timing Role: High-speed, low-phase-error active balun with matched IN+ and IN− paths and precise gain control. Use Value: 0.004° differential phase error and 0.007% differential gain error maintain EVM <1.5% in 256-QAM systems up to 80 MHz bandwidth. | Use Scenario: Buffering a high-speed current-steering DAC (e.g., TI DAC5688) in a broadband waveform generator with 500 MSPS update rate. IC Role / Device Role / Timing Role: Fast-settling output driver that maintains monotonicity and minimizes glitch energy during major carry transitions. Use Value: 25 ns 0.1% settling time and 1000 V/μs slew rate suppress transient-induced spurs, preserving SFDR >75 dBc. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4275DRBR | Identical AC/DC specs but adds power-down pin (PD) and 3–4 μs enable/disable timing; quiescent current drops to ≤1.2 mA in shutdown. | Required where dynamic power gating is needed (e.g., battery-powered portable test equipment with intermittent signal capture). | Select THS4275DRBR only if system-level power sequencing and low-standby-current operation are mandatory. |
| LMH6629MA/NOPB | Lower noise (1.9 nV/√Hz), lower THD (–102 dBc @ 10 MHz), but narrower small-signal bandwidth (1.5 GHz vs. THS4271's 1.4 GHz) and no PowerPAD™ package option. | Better suited for ultra-low-noise DC-coupled sensor interfaces than wideband RF; lacks thermal robustness above +60°C junction. | Choose LMH6629MA/NOPB when noise dominates over thermal margin and PCB space allows SOIC-8 thermal relief. |
Compared with THS4271DRBR, THS4275DRBR adds controllable power-down without sacrificing speed or linearity, while LMH6629MA/NOPB trades thermal resilience and package efficiency for superior noise performance - making THS4271DRBR the optimal choice for thermally constrained, high-output-drive wideband systems.
Availability
THS4271DRBR is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure transceivers, and precision video signal processing requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for THS4271DRBR 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-performance amplifiers and signal chain solutions.
The THS4271 belongs to TI's high-speed voltage-feedback amplifier product line, engineered specifically for wideband, low-distortion, unity-gain-stable operation in demanding RF, instrumentation, and communications applications.
FAQ
What is the maximum junction temperature limit for reliable operation of the THS4271DRBR?
The THS4271DRBR must be operated with junction temperature ≤+60°C to prevent low-level oscillation. This is a hard thermal limit - not a reliability derating threshold. The DRB package's PowerPAD™ must be soldered to a thermally robust PCB ground plane, and θJA = 45.8°C/W assumes proper layout. Exceeding +60°C risks instability even if ambient temperature remains within –40°C to +85°C rating.
Does the THS4271DRBR support single-supply operation, and what are the input/output voltage ranges?
Yes, THS4271DRBR operates from a single 5 V to 10 V supply. With VS = 5 V, the input common-mode range is 1.3 V to 3.7 V (min), and output swing is 1.2 V to 3.8 V (min) into 150 Ω. Rail-to-rail input/output is not supported; design must ensure signals remain within these bounds to avoid clipping or degraded CMRR.
How does the THS4271DRBR differ from the THS4275DRBR beyond the power-down feature?
THS4271DRBR and THS4275DRBR share identical AC/DC specifications, pinout, and package. The sole functional difference is the THS4275DRBR's dedicated PD pin (Pin 5 on DGN/DGK, Pin 4 on DRB), which enables 3–4 μs turn-on/off control and reduces quiescent current to ≤1.2 mA in shutdown. No performance trade-offs exist in active mode.
Can the THS4271DRBR drive a 50 Ω load directly, and what is the impact on distortion?
Yes, THS4271DRBR can drive 50 Ω loads, but harmonic distortion degrades: at G = 1, VO = 1 VPP, f = 30 MHz, THD rises from –92 dBc (150 Ω) to approximately –80 dBc (50 Ω) due to increased output stage loading. For best linearity, use 150 Ω termination or add a series resistor to match 50 Ω while preserving gain accuracy.
Is the THS4271DRBR pin-compatible with other TI high-speed amplifiers like the THS3201 or THS4503?
No, THS4271DRBR is not pin-compatible with THS3201 (current-feedback, different pinout) or THS4503 (fully differential, 10-pin package). Its 8-pin DRB layout is unique to the THS427x family. Substitution requires PCB redesign; only THS4275DRBR is mechanically and electrically pin-compatible.
THS4271DRBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1000V/µs
- Gain Bandwidth Product:
- 400 MHz
- -3db Bandwidth:
- 1.4 GHz
- Current - Input Bias:
- 6 µA
- Voltage - Input Offset:
- 5 mV
- Current - Supply:
- 22mA
- Current - Output / Channel:
- 160 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 15 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
THS4271DRBR FAQ
1.How can I place an order for THS4271DRBR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4271DRBR 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 THS4271DRBR reliable?
The price and inventory of THS4271DRBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4271DRBR is usually 5 days.
3.What payment methods are accepted for THS4271DRBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4271DRBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4271DRBR?
THS4271DRBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4271DRBR 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 THS4271DRBR?
For technical support, including THS4271DRBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4271DRBR requirements.
6.How does Aetrix verify that THS4271DRBR is sourced from the original manufacturer or authorized distributors?
All THS4271DRBR 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 THS4271DRBR meets industry standards.
7.What is the process for return or replacement of THS4271DRBR?
All THS4271DRBR units undergo pre-shipment inspection (PSI). If there is an issue with THS4271DRBR, 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 THS4271DRBR part is unused and in its original packaging.
Return procedure for THS4271DRBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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