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Texas Instruments THS4131CDGNR
- Part No.:
- THS4131CDGNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4131CDGNR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,292
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Product details
Overview
THS4131CDGNR 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, –102 dBc THD at 250 kHz, and 1.25 nV/√Hz input voltage noise, operating from ±2.5 V to ±15 V supplies. It serves as a differential ADC driver in medical ultrasound and instrumentation systems requiring wide dynamic range and high common-mode rejection.
For engineers reviewing the THS4131CDGNR datasheet, THS4131CDGNR pinout, THS4131CDGNR application, or THS4131CDGNR equivalent, this page provides verified electrical specifications, HVSSOP-8 package details, functional mode distinctions versus THS4130, VOCM-controlled output common-mode setting, and real-world design implications of its 95 dB CMRR at 800 kHz and 1.7 pA/√Hz input current noise.
Technical Context
The THS4131CDGNR implements a true fully differential signal path with matched internal gain stages and a dedicated VOCM input that directly sets output common-mode voltage-enabling precise level shifting without external resistive dividers. Its complementary bipolar process supports rail-to-rail output swing (±11.2 V at ±15 V supply) and maintains 95 dB CMRR up to 800 kHz.
No power-down pin is integrated; unlike the THS4130CDGNR, the THS4131CDGNR operates continuously and draws 13 mA quiescent current at ±15 V. Its differential input resistance is 10 kΩ, common-mode input resistance is 215 MΩ, and it drives 800 Ω loads with <61 ns settling to 0.01%.
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. |
| Slew rate | 51 V/µs - supports clean reproduction of fast transient signals such as ultrasound pulses or radar IF waveforms. |
| Total harmonic distortion | –102 dBc at 2 VPP, 250 kHz - ensures minimal spectral contamination in high-fidelity data acquisition paths. |
| Input voltage noise | 1.25 nV/√Hz at 10 kHz - critical for preserving SNR in low-amplitude sensor interfaces like piezoelectric transducers. |
| Common-mode rejection ratio | 95 dB at 800 kHz - suppresses coupled EMI and ground bounce in mixed-signal PCB layouts with shared return paths. |
| Supply voltage range | ±2.5 V to ±15 V dual supply - accommodates both low-power portable systems and high-voltage industrial signal chains. |
| Output voltage swing | ±11.2 V at ±15 V, RL = 1 kΩ - maximizes usable dynamic range before clipping in high-resolution ADC driver applications. |
Pinout & Package
HVSSOP-8 (PowerPAD™) package with exposed thermal pad on underside; requires connection to large copper plane for thermal management. Pin 1 = VIN+, Pin 2 = VOCM, Pin 3 = VCC−, Pin 4 = VOUT−, Pin 5 = VIN−, Pin 6 = VOUT+, Pin 7 = NC, Pin 8 = VCC+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Differential positive input | Accepts one polarity of fully differential or single-ended input; referenced to VOCM for common-mode control. |
| VOCM | Output common-mode voltage control | DC voltage applied here sets midpoint of VOUT+ and VOUT−; floating defaults to (VCC+ + VCC−)/2. |
| VCC− | Negative supply rail | Must be connected to stable negative supply; powers internal bias circuitry and output stage. |
| VOUT− | Negative differential output | Complementary output paired with VOUT+; imbalance degrades CMRR and increases even-order harmonics. |
| VIN− | Differential negative input | Completes differential input pair; matched impedance to VIN+ essential for optimal balance. |
| VOUT+ | Positive differential output | Primary output node; used with VOUT− to drive differential ADC inputs or transmission lines. |
| NC | No connect | Unbonded pin; must remain unconnected per TI specification to avoid parasitic coupling or latch-up risk. |
| VCC+ | Positive supply rail | Supplies core amplifier and output buffers; bypassing with 0.1 µF ceramic capacitor near pin is mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Eliminates need for external baluns or transformer coupling when interfacing with differential ADCs or RF ICs. |
| 95 dB CMRR at 800 kHz | Enables robust operation in noisy industrial environments where ground loops or switching supply noise dominate. |
| VOCM-controlled output level | Allows direct alignment of amplifier output common-mode to ADC reference voltage without resistor networks. |
| 1.25 nV/√Hz input voltage noise | Preserves signal integrity in low-level sensor amplification stages such as ultrasound receive beamforming. |
| HVSSOP-8 PowerPAD™ thermal package | 57.6 °C/W junction-to-ambient thermal resistance enables sustained 13 mA operation at full temperature range. |
Applications
| Medical Ultrasound Imaging | Differential ADC Driver |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducer arrays in portable ultrasound machines. IC Role / Device Role / Timing Role: Fully differential signal conditioner and level shifter between transducer front-end and 14-bit, 80-MSPS ADC. Use Value: 1.25 nV/√Hz noise floor and –102 dBc THD preserve image contrast resolution while enabling >120 dB dynamic range. |
Use Scenario: Driving high-speed differential-input ADCs (e.g., ADS58J86) in automated test equipment. IC Role / Device Role / Timing Role: Single-chip gain block and common-mode translator ensuring matched timing and amplitude across both ADC inputs. Use Value: 170 MHz bandwidth and 61 ns 0.01% settling support accurate sampling of multi-tone IF signals up to 40 MHz. |
| Single-Ended to Differential Conversion | Differential Antialiasing Filter Driver |
Use Scenario: Converting legacy single-ended sensor outputs (e.g., LVDT, strain gauge bridges) into differential format for noise immunity. IC Role / Device Role / Timing Role: Precision gain stage with VOCM-adjustable output common-mode to match downstream filter or ADC requirements. Use Value: 215 MHz gain-bandwidth product allows unity-gain stable operation with minimal phase shift in feedback networks. |
Use Scenario: Buffering and driving passive or active antialiasing filters preceding high-resolution delta-sigma ADCs. IC Role / Device Role / Timing Role: Low-output-impedance driver maintaining filter transfer function integrity under varying load conditions. Use Value: 41 Ω open-loop output resistance and 95 dB CMRR prevent filter response distortion caused by common-mode feedthrough. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131IDGNR | Same silicon, extended –40°C to +85°C temperature grade; identical electrical specs and pinout. | Required for industrial or automotive ambient environments; not suitable for commercial-grade cost-sensitive designs. | Select THS4131IDGNR when operating outside 0°C–70°C ambient range; otherwise THS4131CDGNR suffices. |
| THS4561IRGET | Lower 1.05 nV/√Hz noise, 2.1 GHz GBW, but higher 22 mA ICC; uses 16-pin QFN vs 8-pin HVSSOP. | Better suited for RF sampling receivers or JESD204B ADC interfaces demanding wider bandwidth and lower noise. | Choose THS4561IRGET only if >500 MHz small-signal BW or sub-1.1 nV/√Hz noise is required; THS4131CDGNR remains optimal for DC–170 MHz precision ADC drivers. |
Compared with THS4131IDGNR, the THS4131CDGNR offers identical performance at lower cost for commercial-temperature applications; compared with THS4561IRGET, it trades bandwidth and noise for lower power, smaller footprint, and proven stability in legacy 800-kHz antialiasing filter designs.
Availability
THS4131CDGNR is available at Aetrix Electronics and suitable for medical imaging systems, high-speed data acquisition, industrial process monitoring, and test equipment requiring stable component supply across long production lifecycles.
Supply support for THS4131CDGNR 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 data converters.
The THS413x family was designed specifically for precision differential signal conditioning in ultrasound, instrumentation, and communications infrastructure-emphasizing low distortion, wide bandwidth, and robust common-mode rejection in compact packages.
FAQ
What is the key functional difference between THS4131CDGNR and THS4130CDGNR?
The THS4131CDGNR lacks a power-down (PD) pin, whereas the THS4130CDGNR includes an active-low PD input enabling shutdown mode with 860 µA quiescent current. THS4131CDGNR operates continuously at 13 mA (±15 V), making it simpler for always-on signal chains but unsuitable for battery-powered intermittent-use systems. Both share identical bandwidth, noise, and distortion specs.
Does THS4131CDGNR require external resistors for gain configuration?
Yes, THS4131CDGNR uses external feedback (RF) and gain-setting (RG) resistors to define closed-loop gain and maintain output balance. Recommended values include RF = RG = 390 Ω for G = 1 V/V, and 1% tolerance or better is required to preserve CMRR and minimize even-order distortion. The VOCM pin sets output common-mode independently of gain network.
Can THS4131CDGNR drive a 50-Ω coaxial cable directly?
No-direct 50-Ω loading causes instability due to capacitive reactance and reduced phase margin. TI recommends adding a 20–50 Ω series resistor at each output (VOUT+ and VOUT−) to isolate capacitance and enable proper source termination. This preserves 170 MHz bandwidth while preventing ringing in transmission-line applications.
What is the maximum safe continuous output current for THS4131CDGNR?
The THS4131CDGNR supports up to ±85 mA peak output current into 7 Ω loads at ±15 V supply, but continuous DC current is limited by thermal dissipation. With HVSSOP-8 PowerPAD™ mounted on ≥2 in² copper, sustained 45 mA per output is achievable. Exceeding this without adequate heatsinking risks junction temperature exceeding 125°C, triggering reliability degradation.
How does VOCM pin behavior affect THS4131CDGNR performance in single-ended input configurations?
In single-ended input use, the VOCM pin still defines the output common-mode voltage-critical for matching ADC reference levels. If left floating, VOCM defaults to (VCC+ + VCC−)/2, which may misalign with the ADC's required common-mode input range. Applying a precise voltage (e.g., 2.5 V for a 5-V ADC) via low-impedance source ensures optimal SNR and prevents clipping of either VOUT+ or VOUT−.
THS4131CDGNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-HVSSOP
THS4131CDGNR FAQ
1.How can I place an order for THS4131CDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4131CDGNR 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 THS4131CDGNR reliable?
The price and inventory of THS4131CDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4131CDGNR is usually 5 days.
3.What payment methods are accepted for THS4131CDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4131CDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4131CDGNR?
THS4131CDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4131CDGNR 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 THS4131CDGNR?
For technical support, including THS4131CDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4131CDGNR requirements.
6.How does Aetrix verify that THS4131CDGNR is sourced from the original manufacturer or authorized distributors?
All THS4131CDGNR 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 THS4131CDGNR meets industry standards.
7.What is the process for return or replacement of THS4131CDGNR?
All THS4131CDGNR units undergo pre-shipment inspection (PSI). If there is an issue with THS4131CDGNR, 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 THS4131CDGNR part is unused and in its original packaging.
Return procedure for THS4131CDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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