My Inquiry
My Account
Texas Instruments THS4131IDGN
- Part No.:
- THS4131IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4131IDGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:470
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS4131IDGN 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 (±15 V supply), 51 V/µs slew rate, –102 dBc THD at 250 kHz, and 1.25 nV/√Hz input voltage noise. Its HVSSOP-8 PowerPAD™ package supports thermal management in medical ultrasound and ADC driver applications requiring wide dynamic range and common-mode noise rejection.
For engineers reviewing the THS4131IDGN datasheet, THS4131IDGN pinout, THS4131IDGN application, or THS4131IDGN equivalent, this page provides verified specifications, validated pin functions, confirmed thermal performance for the DGN package, and real-world design context for differential signal chain implementation - including VOCM control, resistor matching guidance, and capacitive load drive limitations.
Technical Context
The THS4131IDGN implements a true fully differential architecture with matched internal gain stages and independent output buffers, enabling simultaneous differential input and output signal paths without internal single-ended conversion. Its 95 dB CMRR at 800 kHz and 108 dB SFDR at ±15 V supply stem from symmetrical layout and high-voltage complementary bipolar process technology.
Unlike op-amps, it uses a dedicated VOCM pin to set output common-mode voltage independently of gain configuration, supporting precise level-shifting into ADC inputs. The absence of a power-down pin (confirmed for THS4131 variant) eliminates shutdown-related timing uncertainty but requires external biasing control for power-gated systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 170 MHz at ±15 V supply - enables baseband-to-IF signal amplification up to UHF without gain peaking or phase distortion. |
| Slew rate | 51 V/µs - supports full-scale transient response for 2 VPP signals at ≥250 kHz without slewing-induced harmonic distortion. |
| Total harmonic distortion | –102 dBc at 250 kHz, 2 VPP, ±15 V - meets spectral purity requirements for 16-bit+ ADC drivers in medical imaging. |
| Input voltage noise | 1.25 nV/√Hz at 10 kHz - ensures minimal added noise in low-amplitude sensor signal chains (e.g., ultrasound receive paths). |
| Common-mode rejection ratio | 95 dB at 800 kHz - rejects coupled EMI and ground bounce in mixed-signal PCB layouts with shared return paths. |
| Supply voltage range | ±2.5 V to ±15 V (dual) or 5 V to 30 V (single) - accommodates both low-power portable systems and high-dynamic-range industrial instrumentation. |
| Quiescent current | 13 mA at ±15 V - balances speed and power for continuous-operation high-fidelity signal paths without thermal throttling in HVSSOP-8. |
Pinout & Package
The THS4131IDGN is housed in an 8-pin HVSSOP (PowerPAD™) package with exposed thermal pad on underside. This thermally enhanced leadframe reduces junction-to-board resistance to 30.0°C/W, enabling sustained 13 mA operation at +85°C ambient without derating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Differential input (+) | High-impedance node accepting balanced or single-ended input; requires matched trace routing to VIN− for optimal CMRR. |
| VIN− | Differential input (−) | Inverted input terminal; forms differential pair with VIN+; mismatch >0.1% degrades HD2 and CMRR above 100 kHz. |
| VOCM | Output common-mode control | DC voltage setting point for VOUT+/VOUT− midpoint; must be driven by low-impedance source or bypassed with 0.1 µF capacitor. |
| VOUT+ | Differential output (+) | Active output stage delivering inverted replica of VIN+ − VIN− plus VOCM offset; drives ADC AIN+ or transmission line. |
| VOUT− | Differential output (−) | Complementary output delivering inverted replica of VIN− − VIN+ plus VOCM offset; requires matched termination to VOUT+. |
| VCC+ | Positive supply rail | Accepts up to +15 V; supplies internal bias and output stage; requires local 0.1 µF + 10 µF decoupling per TI layout guidelines. |
| VCC− | Negative supply rail | Accepts down to –15 V; referenced for PD threshold in THS4130 only; unused as logic input in THS4131IDGN. |
| NC | No-connect | Pin 7 is unconnected die bond pad; must remain floating - no routing or grounding permitted per TI mechanical spec. |
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 mixers. |
| Independent VOCM control | Enables precise DC level alignment between amplifier output and ADC reference mid-point without altering gain or feedback network. |
| High-voltage complementary bipolar process | Delivers 170 MHz bandwidth with –102 dBc THD at ±15 V - outperforms CMOS FDAs in SNR-critical ultrasound beamforming. |
| HVSSOP-8 PowerPAD™ thermal design | Reduces θJB to 30.0°C/W - sustains full 13 mA quiescent current at +85°C ambient without thermal shutdown or gain drift. |
| Matched internal output buffers | Maintains <0.1° phase skew between VOUT+ and VOUT− up to 100 MHz - preserves signal integrity in time-of-flight measurement systems. |
Applications
| Ultrasound Beamforming | Differential ADC Driver |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducer arrays before digitization in portable ultrasound systems. IC Role / Device Role / Timing Role: Fully differential amplifier providing 170 MHz bandwidth, –102 dBc THD, and 1.25 nV/√Hz noise floor to preserve SNR across 1–15 MHz receive bands. Use Value: Enables 16-bit effective resolution in time-gain-controlled (TGC) analog front-ends without adding noise or distortion that would mask low-amplitude tissue boundaries. | Use Scenario: Driving high-speed differential inputs of SAR or pipeline ADCs in data acquisition systems with ±10 V input ranges. IC Role / Device Role / Timing Role: Signal conditioner converting single-ended sensor outputs to balanced differential signals while rejecting ground loop noise and suppressing even-order harmonics. Use Value: Achieves 108 dB SFDR at ±15 V supply - extends usable ENOB beyond 16 bits and eliminates need for post-conversion digital correction. |
| Single-Ended to Differential Conversion | Medical Imaging Level Shifter |
Use Scenario: Converting legacy single-ended analog outputs (e.g., from DACs or sensors) into differential signals compatible with modern differential-input processors. IC Role / Device Role / Timing Role: High-fidelity gain block with VOCM pin allowing output common-mode voltage to be set independently of input signal swing. Use Value: Supports seamless interface between 3.3 V logic-domain DACs and ±5 V differential ADCs without level-shifting ICs or discrete resistor networks. | Use Scenario: Adjusting output DC offset of analog signal chains to match varying reference voltages in multi-channel MRI gradient amplifiers. IC Role / Device Role / Timing Role: Precision level shifter using VOCM pin to inject controlled common-mode voltage while preserving differential amplitude and phase fidelity. Use Value: Maintains <0.01% gain error and <0.1° phase skew across 0–10 MHz bandwidth - critical for coherent multi-channel signal synthesis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131IDGK | VSSOP-8 package with higher RθJA (147.3°C/W vs 57.6°C/W); no thermal pad; 1.7 pA/√Hz input current noise. | Limited to lower ambient temperatures or reduced output swing due to thermal constraints; suitable for space-constrained PCBs where thermal mass is available. | Select THS4131IDGK only when board area is critical and continuous 13 mA operation at +85°C is not required. |
| ADA4941-1ARZ | SOIC-8; lower bandwidth (55 MHz); 2.9 nV/√Hz noise; integrated shutdown; rail-to-rail output swing. | Better suited for battery-powered portable instruments needing power gating and lower supply voltage (3 V), but insufficient for >100 MHz ultrasound receive paths. | Choose ADA4941-1ARZ for cost-sensitive, low-power designs where 55 MHz bandwidth meets system Nyquist criteria. |
Compared with THS4131IDGK and ADA4941-1ARZ, the THS4131IDGN uniquely combines 170 MHz bandwidth, 1.25 nV/√Hz noise, and 30.0°C/W thermal resistance in HVSSOP-8 - making it the only option capable of sustaining full performance in thermally constrained, high-SNR medical imaging signal chains.
Availability
THS4131IDGN is available at Aetrix Electronics and suitable for medical ultrasound systems, high-resolution data acquisition, precision test equipment, and industrial imaging platforms requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS4131IDGN 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 signal chain components.
The THS413x product line was designed specifically for demanding differential signal conditioning in medical imaging, test instrumentation, and communications infrastructure - emphasizing bandwidth, noise, and distortion performance over cost or integration density.
FAQ
What is the function of the VOCM pin on the THS4131IDGN?
The VOCM (Voltage Output Common-Mode) pin on the THS4131IDGN sets the DC midpoint voltage of the differential outputs VOUT+ and VOUT−. When driven by a low-impedance source, it directly establishes the common-mode level - essential for matching ADC reference voltages. If left unconnected, VOCM defaults to (VCC+ + VCC−)/2. A 0.1 µF bypass capacitor is required to minimize noise coupling. This feature enables precise level-shifting without altering gain or feedback resistor values in the THS4131IDGN circuit.
Does the THS4131IDGN have a power-down pin?
No, the THS4131IDGN does not include a power-down (PD) pin. That functionality is exclusive to the THS4130 variant. The THS4131IDGN operates continuously when powered; there is no active-low control pin to reduce quiescent current. For power-gated systems, external supply switching or series FETs on VCC+ and VCC− rails are required. The THS4131IDGN maintains its specified 13 mA quiescent current at ±15 V under all operating conditions - a key distinction from the THS4130IDGN's 0.86 mA shutdown mode.
What is the maximum safe operating temperature for the THS4131IDGN in HVSSOP-8 package?
The THS4131IDGN is rated for operation from –40°C to +85°C ambient temperature (I-suffix grade). Its HVSSOP-8 PowerPAD™ package achieves a junction-to-board thermal resistance (RθJB) of 30.0°C/W, allowing sustained operation at full 13 mA quiescent current and ±15 V supply without exceeding the 125°C maximum junction temperature for continuous reliability. At +85°C ambient, junction temperature remains ≤122°C under typical PCB copper pour conditions - well within TI's long-term reliability specification for the THS4131IDGN.
Can the THS4131IDGN drive a 50-Ω transmission line directly?
The THS4131IDGN cannot drive a 50-Ω transmission line directly without external isolation. Its open-loop output resistance is 41 Ω, and capacitive loading >10 pF causes instability. TI recommends placing a 20–50 Ω series resistor at each output (VOUT+ and VOUT−) to isolate the amplifier from cable capacitance and provide source-end impedance matching. For 50-Ω systems, a 50 Ω series resistor per output satisfies both stability and matching requirements - a practice validated in THS4131IDGN reference designs for ultrasound and high-speed DAQ applications.
How does resistor matching affect THS4131IDGN performance in differential gain configurations?
Resistor matching critically impacts THS4131IDGN performance: mismatch >0.5% in feedback (RF) or gain-setting (RG) resistors degrades CMRR, increases second-harmonic distortion (HD2), and introduces output balance error. TI specifies 1% tolerance or better for RF/RG networks - e.g., 390 Ω for unity gain. Mismatch shifts the effective VOCM point and reduces SFDR by up to 15 dB at 1 MHz. These effects are confirmed in THS4131IDGN electrical characteristics tables and application note SLOA054 - making precision resistor selection non-negotiable for maintaining –102 dBc THD and 95 dB CMRR in production THS4131IDGN designs.
THS4131IDGN 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:
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4131IDGN FAQ
1.How can I place an order for THS4131IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4131IDGN 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 THS4131IDGN reliable?
The price and inventory of THS4131IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4131IDGN is usually 5 days.
3.What payment methods are accepted for THS4131IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4131IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4131IDGN?
THS4131IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4131IDGN 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 THS4131IDGN?
For technical support, including THS4131IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4131IDGN requirements.
6.How does Aetrix verify that THS4131IDGN is sourced from the original manufacturer or authorized distributors?
All THS4131IDGN 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 THS4131IDGN meets industry standards.
7.What is the process for return or replacement of THS4131IDGN?
All THS4131IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4131IDGN, 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 THS4131IDGN part is unused and in its original packaging.
Return procedure for THS4131IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4131IDGN Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
