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Texas Instruments THS4031CDGN
- Part No.:
- THS4031CDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4031CDGN.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:230
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Product details
Overview
THS4031CDGN from Texas Instruments is a single-channel, ultra-low-noise (1.2nV/√Hz), high-speed voltage-feedback operational amplifier optimized for precision analog signal conditioning in demanding wideband applications. It delivers 100MHz bandwidth at G = 2, 100V/μs slew rate, –96dBc THD at 1MHz (RL = 1kΩ), ±13.6V output swing, and features dedicated offset nulling pins (1 & 8) for fine-tuning in high-accuracy DAQ and ADC buffer circuits.
For engineers reviewing the THS4031CDGN datasheet, THS4031CDGN pinout, THS4031CDGN application, or THS4031CDGN equivalent, this page provides verified specifications, HVSSOP-8 package layout, real-world use cases in SAR ADC driving and ultrasound front-ends, and validated alternative options with documented functional and application-level differences.
Technical Context
The THS4031CDGN employs a 30V complementary bipolar process with GHz fT NPN/PNP transistors, enabling voltage-feedback architecture with unity-gain stability (120MHz bandwidth) and fast 70ns settling time (0.1%). Its internal compensation prioritizes bandwidth and slew rate but requires external series isolation (≥20Ω) when driving capacitive loads >10pF to maintain phase margin.
It operates from dual supplies (±4.5V to ±16V) or single supply (9V–32V), supports rail-to-rail input common-mode range (±14.3V at ±15V), and integrates thermal pad (HVSSOP only) for enhanced power dissipation-critical for sustained 200mA output drive capability without thermal derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3dB) | 100MHz at G = 2; enables accurate amplification of signals up to video and ultrasound baseband frequencies. |
| Slew Rate | 100V/μs; supports clean reproduction of fast transient signals (e.g., 20V step in 200ns) without slewing distortion. |
| Voltage Noise | 1.2nV/√Hz @ >10kHz; preserves SNR in low-amplitude sensor and ADC driver stages where noise dominates resolution. |
| THD | –96dBc @ 1MHz, RL = 1kΩ; ensures minimal harmonic contamination in high-fidelity signal chains (e.g., vector signal transceivers). |
| Output Drive | 200mA typical; directly drives heavy loads like 150Ω video lines or multiplexed ADC inputs without external buffers. |
| Input Offset Voltage | 0.3mV typical; reduces DC error in precision gain stages, further adjustable via pins 1 & 8 for sub-100μV calibration. |
| Supply Range | ±4.5V to ±16V dual or 9V–32V single; accommodates industrial and medical systems with varied rail availability. |
Pinout & Package
HVSSOP-8 (DGN) package: 3.0mm × 4.9mm body with exposed thermal pad on bottom; requires connection to large copper plane for optimal thermal performance (RθJB = 33°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 NULL | Offset adjust input | Connect potentiometer wiper to VCC– to actively null input offset voltage-essential for DC-critical instrumentation. |
| 2 IN– | Inverting input | Differential input node; used in inverting configurations or as feedback node in transimpedance amplifiers. |
| 3 IN+ | Noninverting input | High-impedance (2MΩ) input for direct sensor or reference signal connection with minimal loading. |
| 4 VCC– | Negative supply | Return path for bias current and output stage; must be decoupled with 0.1μF capacitor near pin. |
| 5 NC | No connection | Internally unconnected; leave floating-no routing or grounding required. |
| 6 OUT | Amplifier output | Capable of ±13.6V swing into 1kΩ; requires series resistor ≥20Ω if driving >10pF capacitance to prevent oscillation. |
| 7 VCC+ | Positive supply | Primary power rail; decouple with 0.1μF ceramic capacitor close to pin to suppress high-frequency supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 1.2nV/√Hz enables <16-bit effective resolution in 1MHz-bandwidth ADC drivers without noise floor degradation. |
| Offset nulling capability | Pins 1 & 8 allow manual trimming to <50μV, critical for DC-stable active filters and precision integrators. |
| High output current drive | 200mA sourcing/sinking eliminates need for external output buffers in 75Ω video or cable-driver applications. |
| Unity-gain stable architecture | 120MHz bandwidth at G = 1 supports wideband non-inverting buffers without external compensation components. |
| Thermal pad integration | Exposed pad in HVSSOP-8 reduces junction-to-board thermal resistance to 33°C/W, sustaining full output drive at 85°C ambient. |
Applications
| ADC Driver for High-Resolution SAR Converters | Ultrasound Analog Front-End |
|---|---|
Use Scenario: Driving ADS8422 or similar 16-bit SAR ADCs with 8VPP, 0V common-mode input signals requiring minimal additive noise and distortion. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between multiplexer and ADC input, providing fast settling (<70ns) and low THD to preserve ENOB. Use Value: –96dBc THD and 1.2nV/√Hz noise ensure >15.5 ENOB at 1MHz, meeting specification limits for medical-grade data acquisition. | Use Scenario: Amplifying weak echo signals from piezoelectric transducers in portable ultrasound scanners before digitization. IC Role / Device Role / Timing Role: Low-noise, wideband gain stage in receive-path beamformer; handles 1–15MHz bandwidth with minimal phase distortion. Use Value: 100MHz bandwidth and 70ns settling enable accurate time-of-flight measurement across full imaging depth range. |
| Video Signal Distribution | Active Filter for Communications |
Use Scenario: Buffering and distributing composite NTSC/PAL video signals across multiple monitors or recording devices. IC Role / Device Role / Timing Role: 75Ω line driver with differential gain/phase error <0.02%/0.03°, preserving color fidelity and sync integrity. Use Value: 200mA output drive sustains 1VPP into three 75Ω loads simultaneously without droop or overshoot. | Use Scenario: Implementing high-Q Sallen-Key low-pass filters in RF transceiver IF stages or spectrum analyzers. IC Role / Device Role / Timing Role: Active filter op-amp with bandwidth >10× filter cutoff (e.g., 10MHz BW for 1MHz filter), minimizing passband ripple. Use Value: Unity-gain stability and 120MHz GBW allow Butterworth response design up to 12MHz without peaking or instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA656IDBVR | Lower 1.6nV/√Hz noise, 500MHz GBW, but only 45mA output drive and no offset null pins. | Better for ultra-low-noise photodiode preamps; unsuitable for 150Ω video or high-current ADC driving. | Select OPA656IDBVR when noise is primary constraint and load current <50mA; avoid when offset trimming or >100mA drive is needed. |
| LMH6629MF/NOPB | 1.4nV/√Hz noise, 1.5GHz GBW, 120mA drive, no offset null, higher 12.5mA supply current. | Preferred for GHz-range RF sampling buffers; less optimal for DC-coupled precision DAQ due to lack of nulling and higher quiescent power. | Choose LMH6629MF/NOPB for RF/IF signal chains above 100MHz; retain THS4031CDGN for mixed-signal DAQ with DC accuracy requirements. |
Compared with OPA656IDBVR and LMH6629MF/NOPB, the THS4031CDGN uniquely balances ultra-low noise, high output current, and user-adjustable offset-making it the only option among the three qualified for precision, high-drive, DC-stable applications like medical ultrasound front-ends and 16-bit+ SAR ADC buffering.
Availability
THS4031CDGN is available at Aetrix Electronics and suitable for high-resolution data acquisition, medical ultrasound imaging, and broadcast video equipment requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.
Supply support for THS4031CDGN 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 expertise in high-performance op-amps and precision signal-chain solutions.
The THS403x family was designed specifically for low-noise, wideband analog signal conditioning in communications infrastructure, medical imaging, and test equipment-where simultaneous bandwidth, linearity, and noise performance are non-negotiable.
FAQ
What is the maximum safe operating supply voltage for THS4031CDGN?
The THS4031CDGN supports dual-supply operation from ±4.5V to ±16V (32V total) or single-supply from 9V to 32V. Absolute maximum ratings specify VCC– to VCC+ ≤ 33V; exceeding this risks permanent damage. For reliable long-term operation, stay within ±16V or 32V single-supply as specified in Recommended Operating Conditions.
Does THS4031CDGN require external compensation for stability?
No-the THS4031CDGN is internally compensated and unity-gain stable (120MHz bandwidth). However, when driving capacitive loads >10pF, a series isolation resistor (≥20Ω) must be placed between the OUT pin and the load to prevent phase-margin degradation and potential oscillation, as confirmed in Section 7.1.1 of the datasheet.
How is the offset nulling function implemented on THS4031CDGN?
The THS4031CDGN provides dedicated NULL pins (1 and 8) for offset adjustment. Connect a 10kΩ potentiometer between pins 1 and 8, with its wiper tied to VCC–. Adjusting the potentiometer changes the internal bias current balance, reducing input offset voltage to <50μV-enabling calibration in precision instrumentation using the THS4031CDGN.
Can THS4031CDGN drive a 150Ω video load at full output swing?
Yes-the THS4031CDGN delivers ±12.9V output swing into 250Ω and ±12V into 150Ω at ±15V supplies, with 200mA typical output current. This meets SMPTE 259M/424M video line-driving requirements. Use a 75Ω series resistor at the output for proper source termination and stability when driving 75Ω coaxial cables with the THS4031CDGN.
What is the thermal performance advantage of the DGN (HVSSOP) package over SOIC for THS4031CDGN?
The DGN package's exposed thermal pad reduces junction-to-board thermal resistance (RθJB) to 33°C/W versus 72.2°C/W for SOIC-8. This 55% improvement allows the THS4031CDGN to sustain 200mA continuous output drive at 85°C ambient without thermal shutdown-critical for compact, fanless medical or industrial enclosures where heat dissipation is constrained.
THS4031CDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 100V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 100 MHz
- Current - Input Bias:
- 3 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 8.5mA
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4031CDGN FAQ
1.How can I place an order for THS4031CDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4031CDGN 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 THS4031CDGN reliable?
The price and inventory of THS4031CDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4031CDGN is usually 5 days.
3.What payment methods are accepted for THS4031CDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4031CDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4031CDGN?
THS4031CDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4031CDGN 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 THS4031CDGN?
For technical support, including THS4031CDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4031CDGN requirements.
6.How does Aetrix verify that THS4031CDGN is sourced from the original manufacturer or authorized distributors?
All THS4031CDGN 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 THS4031CDGN meets industry standards.
7.What is the process for return or replacement of THS4031CDGN?
All THS4031CDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4031CDGN, 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 THS4031CDGN part is unused and in its original packaging.
Return procedure for THS4031CDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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