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Texas Instruments THS4141CD
- Part No.:
- THS4141CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4141CD.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,362
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Product details
Overview
THS4141CD 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 supply or 5 V single supply. It is used in high-fidelity data acquisition systems requiring balanced signal integrity.
For engineers reviewing the THS4141CD datasheet, THS4141CD pinout, THS4141CD application, or THS4141CD equivalent, key selection criteria include differential output swing (±12.9 V at ±15 V), VOCM-controlled common-mode level setting, matched gain-resistor dependency for CMRR preservation, and PowerPAD™ thermal management requirements in DGN-8 package variants.
Technical Context
The THS4141CD implements a true fully differential signal path-differential input to differential output-with symmetrical internal topology that inherently rejects common-mode noise at both input and output nodes. Its architecture enables cancellation of second-harmonic distortion and improves PSRR via balanced feedback paths.
Unlike conventional op-amps, it defines output common-mode voltage (VOCM) externally, allowing precise DC-level control independent of differential gain. The device lacks shutdown functionality (unlike THS4140CD), confirming its role as a continuously active, high-linearity signal chain component in real-time sampling systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - supports wideband IF/RF sampling up to Nyquist frequencies near 80 MHz |
| 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 16-bit+ ADC driver requirements with minimal harmonic corruption |
| Input Voltage Noise | 6.5 nV/√Hz at 10 kHz - preserves SNR in low-amplitude sensor or post-filter amplification stages |
| Common-Mode Input Range | –4 V to +4.5 V at ±5 V supply - accommodates rail-to-rail input signals while maintaining linearity |
| Output Swing | ±12.9 V at ±15 V supply - delivers full-scale differential drive into 800 Ω loads for high-resolution converters |
| Supply Range | ±2.5 V to ±15 V dual or 5 V single - supports legacy industrial and modern low-voltage embedded designs |
Pinout & Package
The THS4141CD is supplied in an 8-pin SOIC (D) package with standard lead pitch and gull-wing leads. Thermal performance is optimized when mounted on PCB copper planes per TI SLMA002 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN− | Inverting input | Differential input node; requires matched trace length and impedance to VIN+ for CMRR preservation |
| 2: VOCM | Output common-mode control | Sets DC offset of both outputs; bypass with 0.1 µF capacitor to suppress noise coupling |
| 3: VCC+ | Positive supply | Must be decoupled with 0.1 µF ceramic + 6.8 µF tantalum close to pin; shared supplies require individual ceramics |
| 4: VOUT+ | Positive differential output | Delivers inverted-phase signal; output impedance ~43 Ω open-loop; series 20 Ω recommended for >10 pF loads |
| 5: VIN+ | Non-inverting input | Differential input node; symmetry with VIN− critical for harmonic cancellation and PSRR |
| 6: NC | No connect | Internally unconnected; must remain floating-no tie to ground or supply |
| 7: VCC− | Negative supply | Reference for bias and output swing; same decoupling rules apply as VCC+ |
| 8: VOUT− | Negative differential output | Delivers non-inverted-phase signal; complements VOUT+ to form fully differential output pair |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables inherent common-mode noise rejection at both input and output, improving system-level EMI immunity without external baluns |
| VOCM-controlled output level shifting | Allows direct interfacing to ADC reference voltages (e.g., VREF) by tying VOCM to VREF via bypass capacitor, eliminating level-shifting circuitry |
| High slew rate + wide bandwidth | Supports accurate reproduction of multi-MHz transients in ultrasound, radar, and communications baseband chains |
| Low input voltage noise | 6.5 nV/√Hz ensures minimal degradation of SNR in front-end amplification before high-resolution ADCs |
| Matched resistor-dependent CMRR | CMRR > 84 dB achievable only with ≤1% tolerance Rf/Rg networks; mismatch directly degrades antialiasing filter fidelity |
Applications
| High-Speed Data Acquisition | Differential ADC Driver |
|---|---|
Use Scenario: Digitizing analog sensor outputs (e.g., piezoelectric, strain gauge) in automated test equipment with 16-bit+ SAR or sigma-delta ADCs. IC Role / Device Role / Timing Role: Single-ended sensor signal conditioning and conversion to balanced differential format synchronized to ADC sampling clock. Use Value: Enables 2× effective dynamic range vs. single-ended drivers by delivering ±12.9 V swing into 800 Ω, preserving full ADC ENOB at high input frequencies. | Use Scenario: Driving the differential inputs of high-speed pipeline ADCs (e.g., ADS54xx family) in communications infrastructure. IC Role / Device Role / Timing Role: Final-stage analog signal conditioning with precise VOCM alignment to ADC's internal reference, minimizing code-dependent offset errors. Use Value: –79 dB THD at 1 MHz ensures <0.01% harmonic contamination in baseband IQ channels, meeting LTE/WiMAX spectral mask requirements. |
| Antialiasing Filter Interface | Single-Supply Signal Conditioning |
Use Scenario: Integrating active low-pass filtering immediately prior to ADC input in medical imaging front-ends. IC Role / Device Role / Timing Role: Active antialiasing stage where THS4141CD's differential outputs feed passive RC networks with matched impedance to preserve balance. Use Value: Balanced drive maintains filter stopband attenuation symmetry, preventing even-order harmonic leakage into passband due to CM imbalance. | Use Scenario: Battery-powered portable instrumentation using 5 V single supply with rail-splitting or mid-rail VOCM generation. IC Role / Device Role / Timing Role: Level-translating and amplifying low-voltage sensor outputs to match 0–5 V ADC input range while rejecting supply ripple. Use Value: PSRR > 70 dB up to 1 MHz suppresses switching regulator noise in compact layouts, eliminating need for LDO post-regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131CD | 150 MHz BW, 51 V/µs SR, 1.3 nV/√Hz noise - lower noise but reduced bandwidth vs. THS4141CD | Better suited for low-noise, moderate-bandwidth precision measurement where THD < –90 dB is prioritized over speed | Select THS4131CD when input-referred noise dominates system SNR budget and 150 MHz BW suffices |
| THS4561IRGET | 1.8 GHz GBW, 3000 V/µs SR, 2.3 nV/√Hz - significantly faster, higher power, QFN-24 package | Targeted at RF sampling and JESD204B interface applications requiring >500 MSPS ADC support | Choose THS4561IRGET only when >800 MHz small-signal BW or sub-ns settling is required; not drop-in compatible |
Compared with THS4131CD and THS4561IRGET, the THS4141CD occupies a unique mid-tier position: it delivers optimal balance of 160 MHz bandwidth, –79 dB THD, and SOIC-mountable thermal design-making it the preferred choice for 10–100 MSPS data acquisition where layout simplicity and cost-sensitive reliability are critical.
Availability
THS4141CD is available at Aetrix Electronics and suitable for high-speed data acquisition, differential ADC interfacing, and antialiasing filter integration requiring stable component supply across industrial, test & measurement, and medical electronics programs.
Supply support for THS4141CD 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 amplifier design and manufacturing.
The THS4141CD belongs to TI's High-Speed Fully Differential I/O Amplifier product line, engineered specifically for precision signal chain applications demanding low distortion, wide bandwidth, and robust common-mode rejection in ADC driver and instrumentation roles.
FAQ
What is the maximum supply voltage rating for THS4141CD?
The THS4141CD has an absolute maximum supply voltage rating of ±16.5 V across VCC+ to VCC−. Operation beyond this risks permanent damage. Recommended operating range is ±2.5 V to ±15 V dual supply or 5 V single supply. Exceeding ±15 V may degrade THD and increase junction temperature beyond 125°C, triggering thermal derating per TI's dissipation rating table for the D-package variant.
Does THS4141CD support power-down mode?
No, THS4141CD does not include a power-down (PD) pin or shutdown functionality. This distinguishes it from the THS4140CD, which features an active-low PD terminal. The THS4141CD is designed for continuous operation in high-fidelity signal paths where quiescent current stability and absence of wake-up delay are essential-its ICC remains fixed at 16 mA typical under ±5 V conditions.
How should the VOCM pin be configured for optimal THS4141CD performance?
The VOCM pin must be bypassed with a 0.1 µF ceramic capacitor to ground to suppress high-frequency noise coupling. For ADC interfacing, connect VOCM directly to the ADC's reference voltage (VREF) output. Do not leave VOCM floating-internal bias defaults to midrail only under specific conditions and lacks regulation. Incorrect VOCM setup causes output common-mode shift, distorting differential swing and degrading CMRR below 75 dB.
What is the minimum load resistance supported by THS4141CD at ±15 V supply?
At ±15 V supply, THS4141CD supports differential load resistances down to 7 Ω per output (14 Ω total differential), delivering ±12.9 V swing with 85 mA peak output current. However, thermal limits in the D-package restrict continuous operation above 410 mW at 85°C ambient. For sustained full-swing operation, use ≥800 Ω loads or implement thermal vias and copper pour per TI SLMA002 guidelines to maintain junction temperature ≤125°C.
Why is resistor matching critical when using THS4141CD in closed-loop configurations?
Resistor matching directly determines CMRR, PSRR, and second-harmonic cancellation in THS4141CD circuits. A 1% mismatch in feedback/gain resistors degrades CMRR by >10 dB and increases even-order distortion. TI specifies ≤1% tolerance resistors for Rf and Rg to preserve >84 dB CMRR and –85 dB second-harmonic distortion. Unmatched networks also cause VOCM-dependent gain error and output imbalance, compromising ADC ENOB in precision digitization.
THS4141CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS4141CD FAQ
1.How can I place an order for THS4141CD through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4141CD 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 THS4141CD reliable?
The price and inventory of THS4141CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4141CD is usually 5 days.
3.What payment methods are accepted for THS4141CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4141CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4141CD?
THS4141CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4141CD 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 THS4141CD?
For technical support, including THS4141CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4141CD requirements.
6.How does Aetrix verify that THS4141CD is sourced from the original manufacturer or authorized distributors?
All THS4141CD 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 THS4141CD meets industry standards.
7.What is the process for return or replacement of THS4141CD?
All THS4141CD units undergo pre-shipment inspection (PSI). If there is an issue with THS4141CD, 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 THS4141CD part is unused and in its original packaging.
Return procedure for THS4141CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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