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Texas Instruments THS4031IDGN
- Part No.:
- THS4031IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4031IDGN.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,140
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Product details
Overview
THS4031IDGN from Texas Instruments is a single-channel, ultra-low-noise (1.2nV/√Hz), high-speed voltage-feedback operational amplifier in an 8-pin HVSSOP package. It delivers 100MHz bandwidth at G = 2, 100V/μs slew rate, and –96dBc THD at 1MHz into 1kΩ - optimized for precision analog signal conditioning in data acquisition and ADC driver applications.
For engineers reviewing the THS4031IDGN datasheet, THS4031IDGN pinout, THS4031IDGN application, or THS4031IDGN equivalent, key selection criteria include input offset voltage (0.3mV typ), output drive capability (200mA), dual-supply operation (±4.5V to ±16V), offset nulling pins (1 & 8), and thermal pad integration requirements for the DGN package.
Technical Context
The THS4031IDGN employs a 30V complementary bipolar process with GHz fT transistors, enabling unity-gain stability and 120MHz bandwidth in closed-loop configurations. Its voltage-feedback architecture provides predictable gain-bandwidth trade-offs and fast settling (70ns to 0.1%) without requiring external compensation.
It supports both split-supply (±4.5V to ±16V) and single-supply (9V to 32V) operation, with rail-to-rail output swing limited by load impedance and supply voltage. The integrated offset nulling pins (1 and 8) allow fine-tuning of input offset voltage, a feature absent in the dual-channel THS4032 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 100MHz at G = 2 (–3dB); enables wideband signal amplification up to video and ultrasound frequencies. |
| Slew Rate | 100V/μs (±15V); supports clean reproduction of fast transient signals without slewing distortion. |
| Voltage Noise | 1.2nV/√Hz (f > 10kHz); critical for preserving SNR in low-level sensor and ADC front-end stages. |
| THD | –96dBc at 1MHz, RL = 1kΩ; ensures minimal harmonic contamination in high-fidelity signal chains. |
| Input Offset Voltage | 0.3mV typical; reduces DC error in precision gain stages and active filter implementations. |
| Output Drive | 200mA (±15V); drives heavy loads including 150Ω cables and SAR ADC reference buffers directly. |
| Supply Range | ±4.5V to ±16V dual supply; accommodates industrial and test equipment power rails without regulation overhead. |
Pinout & Package
The THS4031IDGN is housed in an 8-pin HVSSOP (DGN) package measuring 3.0mm × 4.9mm, featuring an exposed thermal pad on the bottom for enhanced heat dissipation. The pad must be connected to a large copper plane for optimal thermal performance and may be tied to any potential between VCC+ and VCC−.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 NULL | Offset adjust input | Connect external potentiometer between pins 1 and 8; wiper to VCC− to null input offset voltage. |
| 2 IN– | Inverting input | Differential input node; used for feedback configuration and inverting gain stages. |
| 3 IN+ | Noninverting input | Differential input node; used for noninverting gain stages and active filter inputs. |
| 4 VCC− | Negative supply | Reference for internal biasing; must remain within absolute max rating (≤33V total across supplies). |
| 5 NC | No connection | Internally unconnected; leave floating or tie to ground only if required by PCB layout rules. |
| 6 OUT | Amplifier output | High-current output capable of sourcing/sinking 200mA; requires series isolation resistor for CLOAD > 10pF. |
| 7 VCC+ | Positive supply | Reference for internal biasing; decoupling capacitor (0.1μF) required close to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 1.2nV/√Hz enables high-resolution signal capture in sensor interfaces and medical imaging front-ends. |
| Offset nulling capability | Pins 1 and 8 support external trimming to reduce system-level DC error below 100μV in precision instrumentation. |
| High output current drive | 200mA output sustains full swing into 150Ω video lines or multiplexed ADC input capacitance without external buffers. |
| Unity-gain stable | 120MHz bandwidth at G = 1 allows use in voltage follower, active filter, and cable driver topologies without compensation. |
| Thermal pad integration | Exposed pad in DGN package lowers RθJA to 60.7°C/W - essential for sustained high-output-power operation in compact layouts. |
Applications
| ADC Driver | Video Amplifier |
|---|---|
Use Scenario: Driving the analog input of a 16-bit SAR ADC (e.g., ADS8422) with low-noise, fast-settling signal conditioning. IC Role / Device Role / Timing Role: High-speed buffer and gain stage placed immediately before ADC sampling switch to minimize aperture jitter and maintain SNR. Use Value: 70ns settling time to 0.1% and –96dBc THD preserve effective resolution and spurious-free dynamic range (SFDR) at 1MHz. | Use Scenario: Amplifying composite video signals (NTSC/PAL) in broadcast or test equipment with minimal differential gain/phase error. IC Role / Device Role / Timing Role: Line driver with flat frequency response up to 10MHz and precise DC-coupled gain control. Use Value: 0.015% differential gain error and 0.025° phase error at ±15V ensure color fidelity and timing accuracy in analog video paths. |
| Ultrasound Signal Chain | Active Filter Stage |
Use Scenario: Low-noise amplification of weak echo signals in portable ultrasound front-ends prior to digitization. IC Role / Device Role / Timing Role: First-stage LNA with high gain-bandwidth product and minimal added noise floor. Use Value: 1.2nV/√Hz input voltage noise dominates over transducer noise, maximizing overall system SNR in 1–15MHz band. | Use Scenario: Implementing high-Q Sallen-Key or multiple-feedback active filters in precision measurement systems. IC Role / Device Role / Timing Role: Gain block and integrator core with sufficient bandwidth (>10× filter f3dB) to avoid phase distortion. Use Value: 100MHz GBW supports stable 10MHz second-order filters with Butterworth response and <1% passband ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4031IDR | Same silicon, SOIC-8 (D) package; no thermal pad; RθJA = 124.5°C/W vs 60.7°C/W for DGN. | Limited to lower continuous output power due to higher thermal resistance; unsuitable for sustained 200mA drive. | Select THS4031IDR only when board space allows larger SOIC footprint and thermal load is intermittent. |
| OPA656U | Lower noise (0.92nV/√Hz) but narrower bandwidth (230MHz GBW, 500MHz –3dB); no offset null pins; 16V max supply. | Better noise performance but lacks offset trim and cannot operate at ±16V; not unity-gain stable without external compensation. | Choose OPA656U only for ultra-low-noise, fixed-gain applications where offset drift is managed digitally and supply is ≤±15V. |
Compared with THS4031IDGN, THS4031IDR trades thermal performance for legacy package compatibility, while OPA656U offers superior noise at the cost of flexibility in gain configuration, supply range, and DC trimming - making THS4031IDGN the balanced choice for thermally constrained, precision analog front-ends requiring field-adjustable offset.
Availability
THS4031IDGN is available at Aetrix Electronics and suitable for data acquisition systems, medical ultrasound scanners, broadcast video equipment, and high-resolution ADC driver circuits requiring stable component supply and long-term manufacturability.
Supply support for THS4031IDGN 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 op-amps and signal chain solutions.
The THS403x family was designed specifically for low-noise, wide-bandwidth analog signal conditioning in communications, imaging, and test equipment - emphasizing voltage-feedback speed, distortion performance, and robust output drive.
FAQ
What is the maximum supply voltage for the THS4031IDGN?
The THS4031IDGN supports dual-supply operation from ±4.5V to ±16V (32V total), with absolute maximum ratings limiting VCC+ to VCC− +33V. Exceeding ±16V risks permanent damage per TI's Absolute Maximum Ratings table. Operation at ±15V is recommended for full specification compliance, including 100MHz bandwidth and 100V/μs slew rate. The THS4031IDGN must never be operated beyond these limits even briefly.
Does the THS4031IDGN require external compensation for stability?
No, the THS4031IDGN is internally compensated and unity-gain stable, supporting closed-loop gains from G = 1 to G = 10 without external components. Its 120MHz unity-gain bandwidth and 100MHz bandwidth at G = 2 are specified under standard conditions with proper decoupling (0.1μF ceramic capacitors at VCC+ and VCC−). However, driving capacitive loads >10pF requires a series isolation resistor (≥20Ω) at the output to maintain phase margin.
How is the offset nulling function implemented on the THS4031IDGN?
The THS4031IDGN provides dedicated offset nulling pins (1 and 8) that accept an external 10kΩ potentiometer: its ends connect to pins 1 and 8, and its wiper connects to VCC−. This configuration adjusts the internal input stage bias to reduce input offset voltage to <100μV. This feature is unique to the THS4031 (single-channel) and is not available on the THS4032 dual-channel variant. The THS4031IDGN datasheet Figure 6-4 shows the exact schematic.
Can the THS4031IDGN drive a 150Ω load at full output swing?
Yes, the THS4031IDGN delivers ±12.9V output swing into 250Ω and ±12V into 150Ω at ±15V supplies, with 200mA output current capability. At ±15V, it sustains ±12V into 150Ω (80mA load) with minimal distortion (–81dBc THD). For sustained full-swing operation, ensure PCB layout includes adequate copper area under the thermal pad (RθJB = 33°C/W) and verify junction temperature remains <130°C using TI's thermal metrics in Section 5.4.
What is the purpose of the thermal pad on the THS4031IDGN package?
The exposed thermal pad on the THS4031IDGN's HVSSOP (DGN) package reduces junction-to-board thermal resistance to 33°C/W, enabling reliable operation at high output currents. It must be soldered to a large internal or external copper plane - not left floating - and may be connected to any potential between VCC+ and VCC−, including ground or VCC−. Failure to properly attach the pad results in elevated junction temperatures, derated output current, and potential thermal shutdown or long-term reliability degradation.
THS4031IDGN 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4031IDGN FAQ
1.How can I place an order for THS4031IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4031IDGN 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 THS4031IDGN reliable?
The price and inventory of THS4031IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4031IDGN is usually 5 days.
3.What payment methods are accepted for THS4031IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4031IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4031IDGN?
THS4031IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4031IDGN 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 THS4031IDGN?
For technical support, including THS4031IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4031IDGN requirements.
6.How does Aetrix verify that THS4031IDGN is sourced from the original manufacturer or authorized distributors?
All THS4031IDGN 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 THS4031IDGN meets industry standards.
7.What is the process for return or replacement of THS4031IDGN?
All THS4031IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4031IDGN, 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 THS4031IDGN part is unused and in its original packaging.
Return procedure for THS4031IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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