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Texas Instruments THS4131CDGK
- Part No.:
- THS4131CDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4131CDGK.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,880
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Product details
Overview
THS4131CDGK from Texas Instruments is a fully differential input/output amplifier optimized for high-speed, low-noise signal conditioning in precision analog front-ends. It delivers 170 MHz small-signal bandwidth, 51 V/µs slew rate, and –102 dBc THD at 250 kHz with ±15 V supplies, serving as a differential ADC driver or single-ended-to-differential converter in medical ultrasound and data acquisition systems.
For engineers reviewing the THS4131CDGK datasheet, THS4131CDGK pinout, THS4131CDGK application, or THS4131CDGK equivalent, this page provides verified package mapping (VSSOP-8), confirmed pin functions including VOCM control and differential I/O, thermal performance data (RθJA = 147.3°C/W), and two validated alternative parts with documented functional and application differences.
Technical Context
The THS4131CDGK implements a true fully differential signal path from input to output using TI's high-voltage complementary bipolar process, enabling excellent common-mode noise rejection (95 dB at 800 kHz) and inherent suppression of even-order harmonics. Its VOCM pin directly sets output common-mode voltage, supporting flexible level-shifting without external bias networks.
No power-down pin is present-unlike the THS4130 variant-making it suitable for always-on, low-latency signal chains. The device operates across ±2.5 V to ±15 V dual supplies or 5 V to 30 V single supply, with input common-mode range extending from –3.77 V to +4.3 V (±5 V supply) and differential output swing up to ±11.5 V into 1 kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 170 MHz at ±15 V supply - enables baseband signal amplification up to UHF frequencies without gain peaking or phase degradation |
| Slew rate | 51 V/µs - supports clean reproduction of fast transient signals such as ultrasound pulses or high-speed DAC outputs |
| Total harmonic distortion | –102 dBc at 250 kHz, 2 VPP output - ensures minimal spectral contamination in precision measurement and imaging applications |
| Input voltage noise | 1.25 nV/√Hz at 10 kHz - preserves SNR in low-amplitude sensor interfaces and high-gain stages |
| Common-mode rejection ratio | 95 dB at 800 kHz - rejects coupled interference in noisy industrial or medical environments |
| Supply voltage range | ±2.5 V to ±15 V dual or 5 V to 30 V single - accommodates both low-power portable and high-dynamic-range instrumentation designs |
| Quiescent current | 13 mA at ±15 V - balances speed and power efficiency for continuous operation in battery- or thermally constrained systems |
Pinout & Package
VSSOP-8 (DGK) package with exposed thermal pad electrically isolated from die; requires PCB copper plane connection for thermal management per TI SLMA002/SLMA004 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Differential input (+) | Accepts positive-phase signal; forms balanced pair with VIN– for full rejection of common-mode interference |
| VIN– | Differential input (–) | Accepts negative-phase signal; matched impedance and layout critical for >95 dB CMRR performance |
| VOCM | Common-mode output control | DC voltage applied here sets output common-mode level; bypass with 0.1 µF capacitor minimizes noise coupling |
| VOUT+ | Differential output (+) | Delivers amplified positive-phase signal; output impedance ~41 Ω open-loop, configurable via feedback network |
| VOUT– | Differential output (–) | Delivers amplified negative-phase signal; maintains precise amplitude/phase balance with VOUT+ for low residual CM |
| VCC+ | Positive supply rail | Supports up to +15 V; powers internal bias and output stages; decoupling required within 1 cm of pin |
| VCC– | Negative supply rail | Supports down to –15 V; referenced for PD threshold in THS4130; not used in THS4131 power-down logic |
| NC | No-connect | Pin 7 is unconnected in THS4131CDGK; must remain floating-no tie to ground or supply |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Eliminates need for external baluns or transformer coupling; reduces board area and EMI susceptibility in high-frequency signal paths |
| 1.25 nV/√Hz input voltage noise | Enables high-resolution digitization of microvolt-level sensor outputs without degrading system SNR |
| 95 dB CMRR at 800 kHz | Maintains signal integrity in mixed-signal systems with shared ground planes or switching power supply noise |
| ±15 V supply capability | Provides >22 VPP differential output swing into 1 kΩ, supporting legacy industrial sensors and high-fidelity test equipment |
| VOCM-controlled output level shifting | Allows direct interface to ADCs with non-mid-rail reference voltages (e.g., AFE58JD18 TGC VCNTL) without external op-amps |
Applications
| Medical Ultrasound Imaging | Differential ADC Driver |
|---|---|
Use Scenario: Amplifying echo return signals from piezoelectric transducers before digitization in portable ultrasound systems. IC Role / Device Role / Timing Role: Fully differential amplifier converting single-ended transducer outputs to balanced differential signals for high-SNR ADC sampling. Use Value: –102 dBc THD and 170 MHz bandwidth preserve pulse fidelity and harmonic content critical for B-mode image resolution and Doppler velocity accuracy. |
Use Scenario: Driving the differential inputs of high-speed SAR or pipeline ADCs (e.g., THS1206) in data acquisition modules. IC Role / Device Role / Timing Role: Precision gain stage and level shifter matching ADC input common-mode requirements while rejecting supply noise. Use Value: 95 dB CMRR and VOCM pin enable robust operation despite varying ADC reference voltages and shared digital supply rails. |
| Single-Ended to Differential Conversion | Differential Antialiasing Filter Driver |
Use Scenario: Converting legacy single-ended sensor outputs (e.g., strain gauges, accelerometers) into differential format for noise-immune transmission. IC Role / Device Role / Timing Role: High-linearity buffer with programmable gain and VOCM-adjustable output offset. Use Value: 51 V/µs slew rate handles fast step responses without slewing-induced distortion; 1.25 nV/√Hz noise floor avoids degrading sensor-limited SNR. |
Use Scenario: Driving passive or active antialiasing filters preceding high-speed ADCs in spectrum analyzers and communication receivers. IC Role / Device Role / Timing Role: Low-output-impedance source maintaining filter transfer function integrity across full bandwidth. Use Value: 41 Ω open-loop output resistance and stable phase margin ensure minimal interaction with filter component tolerances and parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131IDGN | HVSSOP-8 package with thermal pad; RθJA = 57.6°C/W vs 147.3°C/W for DGK; same electrical specs | Better thermal performance for high-power or high-ambient-temperature deployments; requires thermal pad soldering | Select THS4131IDGN when ambient temperature exceeds 60°C or continuous output current >40 mA is required |
| THS4561IRGET | Lower noise (0.85 nV/√Hz), higher BW (320 MHz), but lower output swing (±2.5 V); uses different VOCM architecture | Optimized for low-voltage, high-bandwidth ADC drivers (e.g., 16-bit, 100 MSPS+); less suitable for ±15 V signal chains | Choose THS4561IRGET only when system supply is ≤5 V and bandwidth >200 MHz is mandatory |
Compared with THS4131CDGK, THS4131IDGN offers superior thermal dissipation in space-constrained layouts, while THS4561IRGET trades output voltage headroom and supply flexibility for enhanced speed and noise performance-making THS4131CDGK the optimal choice for industrial and medical systems requiring wide supply range and proven reliability at ±15 V.
Availability
THS4131CDGK is available at Aetrix Electronics and suitable for medical ultrasound imaging, high-precision data acquisition, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS4131CDGK 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 over 50 years of innovation in high-performance amplifiers and precision signal chain solutions.
The THS413x product line was designed specifically for demanding fully differential signal conditioning in medical imaging, test equipment, and high-fidelity data acquisition-emphasizing low distortion, wide bandwidth, and robust common-mode rejection.
FAQ
What is the maximum supply voltage rating for THS4131CDGK?
The THS4131CDGK has an absolute maximum supply voltage rating of 33 V across VCC+ and VCC– pins. Recommended operating range is ±2.5 V to ±15 V dual supply or 5 V to 30 V single supply. Exceeding ±15 V in normal operation risks exceeding junction temperature limits and reducing long-term reliability, as specified in Section 7.1 of the SLOS318L datasheet.
Does THS4131CDGK include a power-down feature?
No, THS4131CDGK does not include a power-down pin. Unlike the THS4130 variant, the THS4131CDGK omits the PD pin (pin 7 is NC). This makes it suitable for always-on applications where latency and startup time must be minimized, such as real-time ultrasound beamforming or continuous data logging circuits.
How is the output common-mode voltage set on THS4131CDGK?
The output common-mode voltage of THS4131CDGK is set by applying a DC voltage to the VOCM pin (pin 2). When left unconnected, VOCM defaults to mid-rail (VCC+ + VCC–)/2. For best noise performance, TI recommends bypassing VOCM to ground with a 0.1 µF ceramic capacitor placed within 2 mm of the pin.
What is the thermal resistance of THS4131CDGK in VSSOP-8 package?
The THS4131CDGK in VSSOP-8 (DGK) package has a junction-to-ambient thermal resistance (RθJA) of 147.3°C/W under standard JEDEC JESD51-7 conditions. This value assumes a 1-inch² 2-oz copper pad on the top layer with no internal planes; actual board-level performance depends on PCB copper area and via count beneath the thermal pad.
Can THS4131CDGK drive capacitive loads directly?
THS4131CDGK should not drive capacitive loads >10 pF directly due to potential instability. TI recommends placing a 20 Ω series resistor at each output (VOUT+ and VOUT–) when driving cables or ADC input capacitance. This isolates the amplifier from load capacitance while preserving bandwidth and settling behavior, as shown in Figure 9-1 of the datasheet.
THS4131CDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 52V/µs
- Gain Bandwidth Product:
- 225 MHz
- -3db Bandwidth:
- 150 MHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 12.3mA
- 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-VSSOP
THS4131CDGK FAQ
1.How can I place an order for THS4131CDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4131CDGK 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 THS4131CDGK reliable?
The price and inventory of THS4131CDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4131CDGK is usually 5 days.
3.What payment methods are accepted for THS4131CDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4131CDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4131CDGK?
THS4131CDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4131CDGK 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 THS4131CDGK?
For technical support, including THS4131CDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4131CDGK requirements.
6.How does Aetrix verify that THS4131CDGK is sourced from the original manufacturer or authorized distributors?
All THS4131CDGK 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 THS4131CDGK meets industry standards.
7.What is the process for return or replacement of THS4131CDGK?
All THS4131CDGK units undergo pre-shipment inspection (PSI). If there is an issue with THS4131CDGK, 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 THS4131CDGK part is unused and in its original packaging.
Return procedure for THS4131CDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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