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Texas Instruments THS4141IDGK
- Part No.:
- THS4141IDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4141IDGK.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,991
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Product details
Overview
THS4141IDGK from Texas Instruments is a high-speed fully differential amplifier optimized for single-ended-to-differential conversion and precision ADC driving. It delivers 160 MHz –3 dB bandwidth (±15 V supply), 450 V/µs slew rate, –79 dB third-harmonic distortion at 1 MHz, 6.5 nV/√Hz input-referred voltage noise, and operates from ±2.5 V to ±15 V dual supplies or 5 V single supply. It is used in high-resolution data acquisition systems where balanced signal integrity and low distortion are critical.
For engineers reviewing the THS4141IDGK datasheet, THS4141IDGK pinout, THS4141IDGK application, or THS4141IDGK equivalent, key selection criteria include differential output swing (±12.9 V at ±15 V), VOCM-controlled common-mode level setting, MSOP PowerPAD™ thermal performance, and compatibility with 16-bit+ SAR and sigma-delta ADCs requiring >90 dB SFDR.
Technical Context
The THS4141IDGK implements a true fully differential signal path-differential input to differential output-with symmetrical internal architecture that inherently rejects common-mode noise and cancels second-harmonic distortion. Its BiComI bipolar process enables high slew rate and wide bandwidth while maintaining low input bias current (5.1 µA typical) and stable DC accuracy.
Unlike conventional op-amps, it features a dedicated VOCM pin to set output common-mode voltage independently of input, enabling seamless interfacing with ADC reference voltages. The device lacks shutdown functionality (unlike THS4140), confirming its role as a continuously active, high-fidelity signal conditioner rather than a power-gated component.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - supports wideband signal conditioning up to ~80 MHz Nyquist for high-speed ADCs |
| Slew Rate | 450 V/µs - enables clean reproduction of fast transient signals without slewing-induced distortion |
| THD @ 1 MHz | –79 dB (differential in/out, 2 VPP) - meets dynamic range requirements for 16-bit+ data converters |
| Input Voltage Noise | 6.5 nV/√Hz at 10 kHz - contributes <0.5 LSB error in 16-bit 1 MSPS systems with 100 kΩ source impedance |
| Common-Mode Input Range | –4 V to +4.5 V at ±5 V supply - accommodates rail-to-rail input signals when VOCM is mid-supply |
| Output Swing | ±12.9 V at ±15 V supply - provides full-scale drive for differential ADC inputs with ≥2.5 VPP common-mode tolerance |
| Supply Range | ±2.5 V to ±15 V dual or 5 V single - supports industrial, test equipment, and portable instrumentation designs |
Pinout & Package
The THS4141IDGK is housed in an 8-pin MSOP PowerPAD™ package (DGK), featuring an exposed thermal pad on the underside for enhanced heat dissipation. The PowerPAD must be soldered to a PCB copper pour connected to ground or a thermal plane to maintain junction temperature ≤125°C under continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN−) | Inverting input | Differential input node; matched impedance required with VIN+ for optimal CMRR and distortion cancellation |
| 2 (VOCM) | Output common-mode control | DC voltage applied here sets midpoint of VOUT+ and VOUT−; bypass with 0.1 µF capacitor for noise immunity |
| 3 (VCC+) | Positive supply | Connect to +V rail; requires local 0.1 µF ceramic + 6.8 µF tantalum decoupling per TI layout guidelines |
| 4 (VOUT+) | Positive differential output | Delivers inverted-phase signal relative to VOUT−; series 20 Ω resistor recommended for >10 pF capacitive loads |
| 5 (VIN+) | Non-inverting input | Differential input node; symmetry with VIN− essential for harmonic cancellation and PSRR optimization |
| 6 (NC) | No connect | Internally unused; must remain unconnected and not tied to any net to avoid parasitic coupling |
| 7 (VCC−) | Negative supply | Connect to –V rail; decoupling identical to VCC+; forms return path for quiescent current (16 mA typical) |
| 8 (VOUT−) | Negative differential output | Delivers non-inverted-phase signal relative to VOUT+; maintains balanced output impedance (43 Ω open-loop) |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables inherent common-mode noise rejection (>84 dB CMRR) and second-harmonic cancellation without external trimming |
| VOCM pin with wide bandwidth | Allows precise, high-bandwidth setting of output common-mode level to match ADC reference (e.g., AVDD/2 or external Vref) |
| BiComI complementary bipolar process | Delivers 450 V/µs slew rate and 160 MHz bandwidth while maintaining low 1.25 pA/√Hz input current noise |
| PowerPAD™ thermal enhancement | Reduces θJA to 260°C/W (DGK package), enabling 385 mW power dissipation at 85°C ambient without derating |
| Wide supply flexibility | Operates from 5 V single supply (VOCM = VCC/2) or ±2.5 V to ±15 V dual supplies - simplifies system-level power architecture |
Applications
| High-Speed Data Acquisition | Digital Oscilloscope Front-End |
|---|---|
Use Scenario: Driving 16-bit, 1 MSPS SAR ADC in automated test equipment with ±10 V analog input range. IC Role / Device Role / Timing Role: Single-ended sensor signal to fully differential output converter; sets VOCM to match ADC's internal reference voltage. Use Value: Achieves –79 dB THD and 90 dB SFDR, preserving ENOB >14.5 bits across full bandwidth without transformer coupling. | Use Scenario: Conditioning 100 MHz analog input signals before digitization in real-time oscilloscope acquisition channels. IC Role / Device Role / Timing Role: High-slew-rate differential driver with matched output impedance; VOCM set to mid-supply for symmetric ADC input swing. Use Value: 160 MHz bandwidth and 450 V/µs slew rate prevent signal fidelity loss during fast edge capture, enabling accurate rise-time measurement. |
| Communications Baseband I/Q Modulator | Medical Ultrasound Beamformer |
Use Scenario: Generating balanced I and Q baseband signals for direct-conversion RF transceivers operating up to 40 MHz IF. IC Role / Device Role / Timing Role: Differential transmitter with independent VOCM control per channel; gain configured via external resistors for I/Q amplitude matching. Use Value: –65 dB third-harmonic distortion at 8 MHz ensures clean spectral purity, reducing adjacent-channel interference in LTE/WiFi systems. | Use Scenario: Amplifying echo-return signals from phased-array transducers prior to digitization in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-noise (6.5 nV/√Hz), low-distortion differential receiver; VOCM biased to match ADC common-mode input window. Use Value: Enables >70 dB dynamic range in time-gain compensation stages, supporting deep-tissue imaging with minimal harmonic artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131IDGK | 150 MHz bandwidth, 51 V/µs slew rate, 1.3 nV/√Hz noise - lower distortion but reduced speed vs. THS4141IDGK | Better suited for ultra-low-noise, moderate-bandwidth (<50 MHz) precision measurement where THD < –90 dB is critical | Select THS4131IDGK when noise dominates over speed; THS4141IDGK preferred for >100 MHz signal chains |
| ADA4941-1ARMZ | 35 MHz bandwidth, 47 V/µs slew rate, rail-to-rail output, 2.9 nV/√Hz noise - lower power (12.5 mA ICC), no PowerPAD | Ideal for battery-powered portable instruments requiring low quiescent current and rail-to-rail output swing at lower frequencies | Choose ADA4941-1ARMZ for power-constrained, sub-50 MHz applications; THS4141IDGK remains optimal for high-speed industrial DAQ |
Compared with THS4131IDGK and ADA4941-1ARMZ, the THS4141IDGK offers superior small-signal bandwidth and slew rate for demanding high-frequency signal conditioning, while its PowerPAD package provides better thermal management in continuous high-output-drive scenarios - making it the preferred choice for fixed-installation test equipment and communications infrastructure.
Availability
THS4141IDGK is available at Aetrix Electronics and suitable for high-speed data acquisition, digital oscilloscope front-ends, and medical ultrasound beamformers requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for THS4141IDGK 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 data converter interfaces.
The THS4141IDGK belongs to TI's High-Speed Fully Differential I/O Amplifier product line, designed specifically to replace transformers and discrete op-amp pairs in precision ADC driver, antialiasing filter, and differential communication applications.
FAQ
What is the function of the VOCM pin on the THS4141IDGK?
The VOCM pin on the THS4141IDGK sets the common-mode voltage level of both differential outputs (VOUT+ and VOUT−). When a voltage is applied to VOCM, the amplifier centers its differential output around that DC level - enabling direct interface with ADCs that require specific common-mode input ranges. If left unconnected, VOCM defaults to mid-supply (VCC/2) in single-supply operation. A 0.1 µF bypass capacitor is required for stability and noise rejection. This feature is integral to the THS4141IDGK's role as a flexible, precision ADC driver.
Does the THS4141IDGK support shutdown mode?
No, the THS4141IDGK does not support shutdown mode. Unlike the THS4140 variant (which includes a PD pin), the THS4141IDGK omits the power-down function entirely - confirmed by its pinout (Pin 6 is NC, not PD) and electrical specifications (no ICC(SD) parameter listed). This design choice reflects its target use case: continuous, high-fidelity signal conditioning where power cycling would compromise signal integrity or timing stability. Engineers selecting the THS4141IDGK should plan for uninterrupted operation and thermal management accordingly.
What is the maximum differential output voltage swing for THS4141IDGK at ±15 V supply?
At ±15 V supply, the THS4141IDGK delivers a differential output voltage swing of ±12.9 V (25.8 VPP) under typical conditions with RL = 800 Ω, as specified in the Electrical Characteristics table. This corresponds to a peak single-ended swing of ±12.9 V on each output relative to ground, resulting in a full 25.8 V peak-to-peak differential signal. The actual usable swing depends on load impedance and output current demand; for 7 Ω loads, the swing reduces to ±12 V. This performance makes the THS4141IDGK suitable for driving high-input-range differential ADCs without attenuation.
How does the THS4141IDGK achieve low harmonic distortion?
The THS4141IDGK achieves low harmonic distortion through its fully differential architecture: symmetrical internal circuitry causes even-order harmonics (especially second harmonic) to cancel at the differential output, while the BiComI bipolar process ensures high linearity and low crossover distortion. Measured performance includes –79 dB third-harmonic distortion at 1 MHz and –85 dB second-harmonic distortion under standard test conditions (VO = 2 VPP, RL = 800 Ω). Resistor matching in the external feedback network is critical - TI recommends ≤1% tolerance resistors to preserve this distortion performance. This behavior is intrinsic to the THS4141IDGK's core design, not dependent on external calibration.
Why is the PowerPAD™ thermal pad important for THS4141IDGK reliability?
The PowerPAD™ thermal pad on the THS4141IDGK's DGK package reduces thermal resistance from junction to board (θJA = 260°C/W), enabling safe dissipation of 385 mW at 85°C ambient - critical for sustained high-output-drive operation. Without soldering the pad to a thermally conductive PCB plane, junction temperature can exceed 125°C, triggering distortion increase and long-term reliability degradation. TI's SLMA002/SLMA004 technical briefs specify minimum copper area (≥250 mm²) and thermal vias (≥4×0.3 mm) for optimal performance. This thermal design requirement is mandatory for the THS4141IDGK, not optional.
THS4141IDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 450V/µs
- Gain Bandwidth Product:
- 205 MHz
- -3db Bandwidth:
- 160 MHz
- Current - Input Bias:
- 5.1 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 13.2mA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 33 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
THS4141IDGK FAQ
1.How can I place an order for THS4141IDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4141IDGK 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 THS4141IDGK reliable?
The price and inventory of THS4141IDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4141IDGK is usually 5 days.
3.What payment methods are accepted for THS4141IDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4141IDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4141IDGK?
THS4141IDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4141IDGK 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 THS4141IDGK?
For technical support, including THS4141IDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4141IDGK requirements.
6.How does Aetrix verify that THS4141IDGK is sourced from the original manufacturer or authorized distributors?
All THS4141IDGK 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 THS4141IDGK meets industry standards.
7.What is the process for return or replacement of THS4141IDGK?
All THS4141IDGK units undergo pre-shipment inspection (PSI). If there is an issue with THS4141IDGK, 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 THS4141IDGK part is unused and in its original packaging.
Return procedure for THS4141IDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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