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Texas Instruments THS4151ID
- Part No.:
- THS4151ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4151ID.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:628
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Product details
Overview
THS4151ID from Texas Instruments is a high-speed fully differential amplifier optimized for precision ADC driving, single-ended-to-differential conversion, and antialiasing filtering in data acquisition systems. It delivers 150 MHz –3 dB bandwidth (VCC = ±5 V), 650 V/µs slew rate (VCC = ±15 V), –83 dB total harmonic distortion at 1 MHz, 7.6 nV/√Hz input-referred voltage noise, and operates from ±2.5 V to ±15 V dual supply or 5 V single supply - enabling high-fidelity signal conditioning in medical imaging and test equipment.
For engineers reviewing the THS4151ID datasheet, THS4151ID pinout, THS4151ID application, or THS4151ID equivalent, this page provides verified circuit role, validated pin functions, confirmed thermal and distortion performance across supply ranges, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The THS4151ID implements a true fully differential signal path from input to output using TI's BiComI complementary bipolar process, ensuring balanced gain and phase matching between VOUT+ and VOUT− paths. Its internal architecture supports both differential-input/differential-output and single-ended-input/differential-output configurations without external feedback asymmetry.
It features a dedicated VOCM pin that sets output common-mode voltage independently of input signals, enabling seamless interfacing with differential ADCs requiring precise mid-rail or reference-derived common-mode levels. The device maintains >–75 dB CMRR over temperature and exhibits stable operation into 800 Ω differential loads with <247 ns settling to 0.01% for 2 VPP steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 150 MHz at ±5 V supply - supports wideband baseband and IF signal conditioning up to Nyquist zones of 12-bit+ ADCs sampling at ≥100 MSPS. |
| Slew Rate | 650 V/µs at ±15 V - enables clean reproduction of fast transient signals without slewing-induced distortion in pulse-based systems. |
| Total Harmonic Distortion | –83 dB at 1 MHz, VO = 2 VPP - ensures minimal spectral contamination in high-resolution digitization of audio, ultrasound, or sensor outputs. |
| Input Voltage Noise | 7.6 nV/√Hz above 10 kHz - preserves SNR integrity when amplifying low-amplitude signals from piezoelectric sensors or photodiode transimpedance stages. |
| Supply Range | ±2.5 V to ±15 V dual or 5 V single - allows direct integration into legacy ±15 V analog backplanes or modern low-voltage mixed-signal SoC interfaces. |
| Output Swing | ±3.6 V (min) at ±5 V supply - delivers full-scale differential drive to 16-bit SAR or sigma-delta ADCs with 4 VPP input range. |
| Quiescent Current | 18.5 mA typical at ±5 V - balances speed and power for continuous-operation instrumentation where thermal management is constrained. |
Pinout & Package
THS4151ID is packaged in an 8-pin SOIC (D package) with exposed PowerPAD™ thermal pad on underside, rated for –40°C to +85°C industrial operation. Thermal design requires soldering the PowerPAD to a copper plane for junction temperature control below 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; matched impedance and layout critical for CMRR and harmonic cancellation. |
| VOCM | Output common-mode control | DC bias reference for VOUT+ and VOUT−; bypass with 0.1 µF capacitor to suppress noise coupling. |
| VCC+ | Positive supply rail | Accepts +2.5 V to +15 V; must be decoupled locally with 0.1 µF ceramic + 4.7 µF tantalum. |
| VOUT+ | Positive differential output | Active output with 0.4 Ω open-loop resistance; requires series resistor (≥20 Ω) when driving >10 pF capacitive loads. |
| VIN+ | Non-inverting input | Differential input node; symmetric trace routing required to maintain amplitude/phase balance vs. VIN−. |
| NC | No connect | Internally unused; must remain unconnected and unstubbed to avoid parasitic coupling. |
| VCC− | Negative supply rail | Accepts –2.5 V to –15 V; shares same decoupling requirements as VCC+. |
| VOUT− | Negative differential output | Complementary output to VOUT+; differential swing equals |VOUT+ − VOUT−|; enables rejection of even-order harmonics. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | True differential signal path eliminates second-harmonic distortion and improves common-mode noise immunity by >15 dB vs. single-ended op-amps. |
| Wide supply flexibility | Operates from 5 V single supply (VOCM = VCC/2) or ±2.5 V to ±15 V dual supply - simplifies system-level power domain partitioning. |
| High-speed precision | 150 MHz bandwidth + –83 dB THD at 1 MHz enables accurate digitization of 10+ ENOB signals up to 20 MSPS without post-processing correction. |
| Low-noise signal conditioning | 7.6 nV/√Hz input voltage noise + 1.78 pA/√Hz current noise preserves dynamic range when amplifying microvolt-level sensor outputs. |
| Thermally enhanced SOIC | PowerPAD™ package reduces θJA to 97.5°C/W - sustains 1.02 W power dissipation at TA = 25°C with proper PCB copper area. |
Applications
| Medical Ultrasound Front-End | High-Speed Data Acquisition System |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers before digitization by a 14-bit, 80-MSPS ADC. IC Role / Device Role / Timing Role: Single-ended-to-differential converter and antialiasing filter driver with programmable VOCM alignment to ADC reference. Use Value: 150 MHz bandwidth captures harmonics up to 40 MHz; –83 dB THD prevents ghosting artifacts in B-mode imaging. |
Use Scenario: Driving differential inputs of a 16-bit SAR ADC in automated test equipment measuring fast transient waveforms. IC Role / Device Role / Timing Role: High-slew-rate buffer with matched output timing to minimize skew-induced differential jitter. Use Value: 650 V/µs slew rate ensures <53 ns settling to 0.1% for 2 VPP steps, preserving waveform fidelity at 100 kHz update rates. |
| Communications Baseband Processing | Industrial Sensor Signal Conditioning |
Use Scenario: Level-shifting and balancing I/Q baseband signals from a quadrature modulator prior to DAC input. IC Role / Device Role / Timing Role: Differential transmitter with VOCM-adjustable common-mode offset for DC-coupled DAC interface compliance. Use Value: VOCM pin accepts external reference (e.g., DAC VREF/2), enabling zero-DC-offset differential signaling without AC coupling capacitors. |
Use Scenario: Conditioning low-amplitude bridge sensor outputs (e.g., strain gauge) in harsh industrial environments. IC Role / Device Role / Timing Role: Precision differential amplifier rejecting EMI-coupled common-mode noise on long sensor cables. Use Value: >–75 dB CMRR across frequency minimizes 50/60 Hz line interference; 14.4 MΩ input resistance avoids loading high-Z bridges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131ID | 150 MHz BW, 51 V/µs slew rate, 1.3 nV/√Hz noise - lower speed but superior noise performance. | Better suited for low-frequency, ultra-low-noise applications (e.g., precision weigh scales) where slew rate is not limiting. | Select THS4131ID when input-referred noise <2 nV/√Hz is prioritized over large-signal transient response. |
| THS4141ID | 160 MHz BW, 450 V/µs slew rate, 6.5 nV/√Hz noise - higher bandwidth and faster settling than THS4151ID. | Preferred for >100 MSPS ADC drivers where 0.01% settling time <200 ns is mandatory (e.g., radar pulse capture). | Choose THS4141ID when system-level bandwidth exceeds 150 MHz and THD specification remains ≤–80 dB at target frequency. |
Compared with THS4151ID, THS4131ID trades slew rate for lower noise in sub-10 MHz applications, while THS4141ID extends usable bandwidth and settling speed at the cost of higher quiescent current (21 mA vs. 18.5 mA) and reduced THD margin above 5 MHz.
Availability
THS4151ID is available at Aetrix Electronics and suitable for medical imaging front-ends, high-speed data acquisition systems, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS4151ID 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 interface solutions.
The THS415x family was designed specifically for high-fidelity differential signal conditioning in precision data acquisition, offering optimized speed-noise-distortion trade-offs for ADC driver and antialiasing filter applications.
FAQ
What is the maximum operating temperature range for THS4151ID?
The THS4151ID is specified for industrial operation from –40°C to +85°C ambient temperature (I-suffix grade). Its absolute maximum junction temperature is 150°C, but continuous reliable operation requires keeping TJ ≤ 125°C via proper PowerPAD™ thermal management on the PCB.
Does THS4151ID support single-supply operation?
Yes, THS4151ID supports 5 V single-supply operation. When no external voltage is applied to VOCM, it defaults to VCC/2 (2.5 V), enabling differential output centered at mid-rail - ideal for interfacing with single-supply differential ADCs like the ADS8860.
How does the VOCM pin function in THS4151ID?
The VOCM pin sets the common-mode voltage of both VOUT+ and VOUT− outputs. It accepts an external DC reference (e.g., ADC VREF/2) or floats to VCC/2 in single-supply mode. A 0.1 µF bypass capacitor is mandatory to prevent noise injection and ensure stability per TI SLOS321G.
What is the recommended layout practice for THS4151ID's differential inputs?
Matched trace length and impedance between VIN+ and VIN− is essential to preserve CMRR and minimize even-order harmonic distortion. Use symmetrical microstrip routing over solid ground plane, avoid vias in signal paths, and place feedback resistors (Rf, Rg) as close as possible to the device pins per TI application note SBAA163.
Can THS4151ID drive a 50 Ω transmission line directly?
No - THS4151ID requires a minimum 20 Ω series resistor at each output (VOUT+, VOUT−) when driving 50 Ω loads to maintain stability. This isolates capacitive loading and provides source termination; the resulting 40 Ω series + 50 Ω load yields ~90 Ω effective impedance, compatible with standard coaxial interfaces.
THS4151ID 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:
- 650V/µs
- Gain Bandwidth Product:
- 340 MHz
- -3db Bandwidth:
- 150 MHz
- Current - Input Bias:
- 4.3 µA
- Voltage - Input Offset:
- 1.1 mV
- Current - Supply:
- 17.5mA
- 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-SOIC
THS4151ID FAQ
1.How can I place an order for THS4151ID through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4151ID 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 THS4151ID reliable?
The price and inventory of THS4151ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4151ID is usually 5 days.
3.What payment methods are accepted for THS4151ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4151ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4151ID?
THS4151ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4151ID 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 THS4151ID?
For technical support, including THS4151ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4151ID requirements.
6.How does Aetrix verify that THS4151ID is sourced from the original manufacturer or authorized distributors?
All THS4151ID 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 THS4151ID meets industry standards.
7.What is the process for return or replacement of THS4151ID?
All THS4151ID units undergo pre-shipment inspection (PSI). If there is an issue with THS4151ID, 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 THS4151ID part is unused and in its original packaging.
Return procedure for THS4151ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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