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Texas Instruments THS4541IRUNT
- Part No.:
- THS4541IRUNT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFQFN
- Datasheet:
-
THS4541IRUNT.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 10WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:173
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Product details
Overview
THS4541IRUNT from Texas Instruments is a negative-rail-input, rail-to-rail-output fully differential amplifier (FDA) optimized for high-performance, low-power ADC driving. It delivers 500MHz small-signal bandwidth at G = 2V/V, 850MHz gain-bandwidth product, 1500V/µs slew rate, –95dBc HD2 and –90dBc HD3 at 10MHz (2VPP), and operates from 2.7V to 5.4V single supply. It enables dc-coupled interface between ground-referenced bipolar sources and SAR/ΔΣ/pipeline ADCs.
For engineers reviewing the THS4541IRUNT datasheet, THS4541IRUNT pinout, THS4541IRUNT application, or THS4541IRUNT equivalent, key selection criteria include negative-rail input capability for dc-coupled signal conditioning, rail-to-rail output swing into ≥50Ω loads, Vocm-controlled common-mode output setting, power-down mode (2µA), and operation across –40°C to +125°C.
Technical Context
The THS4541IRUNT uses a voltage-feedback FDA architecture with independent input common-mode range extending below the negative rail and output swing to both supply rails. Its internal feedback structure supports precise differential output control via the Vocm pin, enabling accurate matching to ADC input common-mode requirements.
It integrates robust power-down logic with sub-µA quiescent current, fast 100ns turn-on/60ns turn-off timing, and maintains <±12mV CM offset shift over full supply headroom. The device is characterized for stable operation into capacitive loads up to 100pF using recommended series output resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (G=2) | 500MHz - Enables wideband signal conditioning for >200MSPS ADCs without gain-dependent bandwidth collapse. |
| Gain-bandwidth product | 850MHz - Supports stable closed-loop gains up to G=10 while preserving >125MHz bandwidth. |
| Slew rate | 1500V/µs - Ensures faithful reproduction of fast transient signals (e.g., 2V step in ≤1.4ns) without slewing distortion. |
| HD2 / HD3 @10MHz | –95dBc / –90dBc - Delivers ultra-low harmonic distortion for high-SNR data acquisition in precision measurement systems. |
| Input voltage noise | 2.2nV/√Hz - Minimizes added noise in front-end amplification stages, critical for low-level sensor or DAC output buffering. |
| Quiescent current | 10.1mA @5V - Balances performance and power efficiency for high-density, battery-sensitive, or thermally constrained designs. |
| Operating temperature | –40°C to +125°C - Qualified for automotive under-hood, industrial motor control, and aerospace avionics environments. |
Pinout & Package
THS4541IRUNT is packaged in a 10-pin WQFN (RUN) with 2mm × 2mm footprint and exposed thermal pad. Pin 1 is IN–; pins 2 and 3 are PD and OUT–; pins 4–5 are OUT+ and Vocm; pins 6–7 are Vs– and Vs+; pins 8–10 are IN+, NC, and NC. The exposed pad must be soldered to a ground or power plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN– | Inverting input | Accepts differential or single-ended input; supports common-mode down to (Vs–) – 0.1V for true negative-rail operation. |
| PD | Power-down enable | Logic-high enables normal operation; logic-low reduces quiescent current to ≤8µA with 60ns turn-off delay. |
| OUT– | Negative output | Delivers rail-to-rail differential output swing; requires matched termination (e.g., 500Ω) for optimal distortion performance. |
| OUT+ | Positive output | Complements OUT– to form fully differential output pair; enables rejection of common-mode noise in ADC interfaces. |
| Vocm | Output common-mode control | Directly sets average output DC level (0.975–0.995V/V gain); open-circuit defaults to midsupply ±8mV. |
| Vs– | Negative supply | Supports single-supply (GND) or split-supply (±1.35V to ±2.7V); multiple pins reduce IR drop and improve PSRR. |
| Vs+ | Positive supply | Accepts 2.7V–5.4V; dual or triple connections ensure low-impedance path for high-frequency supply currents. |
| IN+ | Noninverting input | Completes differential input pair; input impedance is 110kΩ || 0.85pF for minimal loading of preceding stage. |
Key Features
| Feature | Design Value |
|---|---|
| Negative-rail input (NRI) | Enables dc-coupled interface to ground-centered bipolar sources without level-shifting circuitry or dual supplies. |
| Rail-to-rail output (RRO) | Delivers full dynamic range into ADCs with input ranges spanning from Vs– to Vs+, maximizing SNR utilization. |
| Vocm-controlled common-mode | Allows precise alignment of differential output midpoint to ADC's required input common-mode voltage, eliminating external bias networks. |
| Power-down mode | Reduces supply current to ≤8µA while maintaining fast 100ns wake-up, ideal for duty-cycled or event-triggered signal chains. |
| Robust load drive | Stable operation into RL ≥ 50Ω and CL up to 100pF (with Ro compensation), simplifying layout for high-speed PCB interconnects. |
Applications
| High-Speed Data Acquisition | Low-Power Sensor Interface |
|---|---|
Use Scenario: Driving SAR or pipeline ADCs (e.g., ADS8900B, ADC3660) in portable test equipment requiring >100dB SFDR at 10MHz. IC Role / Device Role / Timing Role: Fully differential amplifier providing gain, common-mode translation, and distortion-limited signal conditioning before digitization. Use Value: –95dBc HD2 ensures >16-bit ENOB preservation; 500MHz bandwidth supports >200MSPS sampling without aliasing penalties. | Use Scenario: Conditioning low-amplitude outputs from MEMS accelerometers or precision DACs (e.g., DAC80508) in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Single-ended to differential converter with programmable Vocm, enabling direct connection to low-power ΔΣ ADCs. Use Value: 2.2nV/√Hz input noise and 10.1mA quiescent current optimize dynamic range per milliwatt in always-on sensing applications. |
| Differential Active Filtering | DC-Coupled ADC Front-End |
Use Scenario: Implementing 2nd-order Chebyshev or elliptic filters in medical imaging front-ends where phase linearity and group delay flatness are critical. IC Role / Device Role / Timing Role: Active filter building block with configurable gain and common-mode setpoint, used in cascaded biquad topologies. Use Value: 850MHz GBW and low 0.5µV/°C offset drift maintain filter accuracy across temperature and frequency sweep. | Use Scenario: Interfacing dc-coupled, ground-referenced signal sources (e.g., strain gauge bridges, photodiode TIA outputs) to ADC3xxx-family converters. IC Role / Device Role / Timing Role: Precision FDA with NRI and RRO, eliminating need for input AC coupling or output level-shifting components. Use Value: Input common-mode extends to (Vs–) – 0.1V and output swings to within 250mV of rails, preserving full signal fidelity in zero-V offset systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4932-1ACPZ-R7 | Pin-compatible VQFN-16; higher 145MHz BW but 0.95mA IQ; no power-down; limited to ±2.5V max supply. | Best suited for fixed-supply, lower-frequency (<50MHz), ultra-low-power systems where power-down is unnecessary. | Select ADA4932-1 when board space allows VQFN-16 and system does not require power-down or extended supply range. |
| THS4521RGTT | Same 10-pin WQFN package; 145MHz BW, 0.95mA IQ, –102dBc HD3 at 100kHz; lacks NRI and Vocm control. | Ideal for ac-coupled, cost-sensitive applications where dc accuracy and common-mode flexibility are secondary. | Choose THS4521RGTT only if dc coupling, negative-rail input, or precise Vocm adjustment are not required. |
Compared with ADA4932-1 and THS4521, THS4541IRUNT uniquely combines pin-compatible WQFN-10 packaging, negative-rail input, rail-to-rail output, Vocm control, and power-down-enabling compact, flexible, and energy-efficient ADC driver designs across automotive, industrial, and portable instrumentation.
Availability
THS4541IRUNT is available at Aetrix Electronics and suitable for high-speed data acquisition, low-power sensor interface, differential active filtering, and dc-coupled ADC front-end applications requiring stable component supply, extended temperature operation, and consistent parametric performance.
Supply support for THS4541IRUNT 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, embedded processing, and connectivity technologies with decades of high-precision amplifier design heritage.
The THS4541 belongs to TI's high-speed, low-power FDA product line, engineered specifically for precision, wideband ADC/DAC interface applications demanding rail-to-rail swing, negative-rail input, and robust thermal performance across –40°C to +125°C.
FAQ
What is the maximum operating supply voltage for THS4541IRUNT?
The THS4541IRUNT supports a total supply voltage range of 2.7V to 5.4V. Absolute maximum rating is 5.5V across Vs+ and Vs–. Exceeding this may cause permanent damage. Operation at 5.4V is fully characterized and supported across the full temperature range, delivering specified bandwidth, distortion, and output swing.
Does THS4541IRUNT support true dc-coupled operation with ground-referenced inputs?
Yes. THS4541IRUNT features negative-rail input (NRI), allowing its input common-mode range to extend to (Vs–) – 0.1V. When powered from a single 3.3V or 5V supply with Vs– = GND, it accepts input signals down to –0.1V - enabling direct dc-coupled connection to ground-centered bipolar sources without level-shifting circuitry.
How does the Vocm pin function in THS4541IRUNT, and what happens if left unconnected?
The Vocm pin in THS4541IRUNT directly controls the average DC level of the differential output. With Vocm open, the output common-mode defaults to midsupply ±8mV. Driving Vocm with a stable voltage (e.g., from a DAC or resistor divider) sets the output midpoint with 0.975–0.995V/V gain and <±7mV offset error across –40°C to +125°C.
What is the minimum load resistance THS4541IRUNT can drive while maintaining specified distortion performance?
THS4541IRUNT is characterized for robust operation with RL ≥ 50Ω. At 10MHz and 2VPP output, HD2 remains ≤–95dBc and HD3 ≤–90dBc into 500Ω; distortion degrades only marginally into 100Ω (–88dBc HD3). For 50Ω loads, use matched 50Ω terminations at both outputs to preserve balance and minimize reflections.
Is THS4541IRUNT pin-compatible with any other Texas Instruments FDA devices?
No - THS4541IRUNT (WQFN-10) is not pin-compatible with other TI FDAs. It shares functional similarity with THS4541RGT (VQFN-16), but pin count, layout, and terminal assignments differ. The datasheet explicitly notes pin-compatibility only with Analog Devices' ADA4932-1 (VQFN-16), not with TI's own THS4521 or THS4531A.
THS4541IRUNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 1500V/µs
- Gain Bandwidth Product:
- 850 MHz
- -3db Bandwidth:
- 620 MHz
- Current - Input Bias:
- 12 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 10.1mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.4 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WQFN (2x2)
THS4541IRUNT FAQ
1.How can I place an order for THS4541IRUNT through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4541IRUNT 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 THS4541IRUNT reliable?
The price and inventory of THS4541IRUNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4541IRUNT is usually 5 days.
3.What payment methods are accepted for THS4541IRUNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4541IRUNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4541IRUNT?
THS4541IRUNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4541IRUNT 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 THS4541IRUNT?
For technical support, including THS4541IRUNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4541IRUNT requirements.
6.How does Aetrix verify that THS4541IRUNT is sourced from the original manufacturer or authorized distributors?
All THS4541IRUNT 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 THS4541IRUNT meets industry standards.
7.What is the process for return or replacement of THS4541IRUNT?
All THS4541IRUNT units undergo pre-shipment inspection (PSI). If there is an issue with THS4541IRUNT, 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 THS4541IRUNT part is unused and in its original packaging.
Return procedure for THS4541IRUNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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