My Inquiry
My Account
Texas Instruments THS4131CDGN
- Part No.:
- THS4131CDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4131CDGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,320
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS4131CDGN 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 instrumentation systems.
For engineers reviewing the THS4131CDGN datasheet, THS4131CDGN pinout, THS4131CDGN application, or THS4131CDGN equivalent, key selection criteria include its 1.25 nV/√Hz input voltage noise, 95 dB CMRR at 800 kHz, HVSSOP-8 PowerPAD™ thermal performance, and absence of power-down functionality compared to THS4130 variants.
Technical Context
The THS4131CDGN 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 and even-order harmonic suppression. Its VOCM pin directly sets output common-mode voltage, and internal 10-kΩ resistors tie each output to the VCM error amplifier, defining closed-loop differential output impedance as [(2 × RF + 2 × RG) || 20 kΩ].
No power-down circuitry is integrated - unlike the THS4130, the THS4131CDGN lacks a PD pin and operates continuously. The HVSSOP-8 package includes an electrically isolated thermal pad requiring connection to a large copper plane for junction temperature control under high-output-current conditions (up to ±85 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 170 MHz at ±15 V supply - enables wideband signal chain design up to ~100 MHz usable bandwidth with gain = 1. |
| Slew rate | 51 V/µs - supports fast transient response for 2-VPP signals without distortion at frequencies up to ~8 MHz. |
| Input voltage noise | 1.25 nV/√Hz at 10 kHz - critical for preserving SNR in low-amplitude sensor interfaces and ultrasound receive paths. |
| THD | –102 dBc at 250 kHz, 2 VPP, ±15 V - ensures minimal harmonic contamination in high-fidelity data acquisition. |
| CMRR | 95 dB at 800 kHz - rejects coupled noise in mixed-signal PCB layouts and noisy industrial environments. |
| Supply range | ±2.5 V to ±15 V (dual) or 5 V to 30 V (single) - accommodates both low-voltage portable and high-dynamic-range industrial rails. |
| Quiescent current | 13 mA at ±15 V - defines thermal load in continuous operation; no shutdown mode reduces system power sequencing complexity. |
Pinout & Package
HVSSOP-8 PowerPAD™ package with exposed thermal pad on underside; requires soldering to PCB copper pour for thermal management. Thermal pad is electrically isolated and may connect to any potential.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Differential input (+) | Accepts positive phase of fully differential or single-ended input signal; high-impedance node (215 MΩ common-mode RIN). |
| VIN− | Differential input (−) | Accepts negative phase of differential input or ground reference for single-ended use; matched to VIN+ for balance. |
| VOCM | Common-mode output control | DC voltage applied here sets output common-mode level; floating defaults to (VCC+ + VCC−)/2; bypass with 0.1 µF recommended. |
| VOUT+ | Differential output (+) | Delivers amplified positive-phase output; internal 10-kΩ resistor connects to VCM error amplifier for feedback stability. |
| VOUT− | Differential output (−) | Delivers inverted-phase output; symmetric architecture ensures amplitude/phase matching critical for ADC interface integrity. |
| VCC+ | Positive supply | Supports up to +15 V; powers output stage and internal bias circuits; PSRR = 98 dB (dc) minimizes supply ripple coupling. |
| VCC− | Negative supply | Supports down to –15 V; defines lower rail for bipolar signal swing; complements VCC+ for ±11.5 V output swing (RL = 1 kΩ). |
| NC | No-connect | Pin 7 is unconnected in THS4131CDGN; must remain floating - not tied to ground or supply per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables single-ended-to-differential conversion without external baluns or transformers, reducing board area and EMI susceptibility. |
| 95 dB CMRR at 800 kHz | Rejects common-mode interference from switching power supplies or digital noise coupling into analog traces. |
| 1.25 nV/√Hz input voltage noise | Maintains >16-bit ENOB in 1-MHz bandwidth ADC drivers when paired with low-noise 24-bit converters like ADS127L01. |
| HVSSOP-8 PowerPAD™ thermal design | RθJB = 30.0 °C/W enables 85°C ambient operation at full output current (±85 mA) without derating. |
| No power-down pin | Eliminates need for external enable logic or sequencing circuitry - simplifies system-level power management in always-on applications. |
Applications
| Medical Ultrasound Imaging | Differential ADC Driver |
|---|---|
Use Scenario: Amplifying weak echo 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: 1.25 nV/√Hz noise floor preserves microvolt-level echoes; –102 dBc THD prevents harmonic artifacts mimicking tissue boundaries. |
Use Scenario: Driving the differential inputs of precision SAR or delta-sigma ADCs such as ADS131M04 in energy metering. IC Role / Device Role / Timing Role: High-speed, low-distortion buffer isolating ADC inputs from source impedance variations and ensuring clean sampling. Use Value: 170 MHz bandwidth supports >5 MSPS sampling with minimal group delay variation; 95 dB CMRR suppresses digital feedthrough from ADC digital lines. |
| Single-Ended to Differential Conversion | Differential Antialiasing Filter Driver |
Use Scenario: Converting legacy single-ended sensor outputs (e.g., strain gauges, RTDs) to differential format for modern isolated ADCs. IC Role / Device Role / Timing Role: Gain-stage FDA accepting single-ended input while generating matched, inverted output pair referenced to VOCM. Use Value: Eliminates need for discrete op-amp pairs or transformers; VOCM pin allows precise DC offset alignment with ADC common-mode input range. |
Use Scenario: Driving passive RC antialiasing filters preceding high-speed ADCs in communications test equipment. IC Role / Device Role / Timing Role: Low-output-impedance driver maintaining filter transfer function integrity despite capacitive loading. Use Value: Output stage drives ≥10 pF loads without oscillation when series 20-Ω resistors are added; preserves filter stopband attenuation above Nyquist. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561IRGET | Lower noise (0.85 nV/√Hz), wider bandwidth (3200 MHz GBW), but only ±5 V max supply; no VOCM pin - uses internal reference. | Better for RF/IF signal chains up to 1 GHz; unsuitable for ±15 V industrial sensor interfaces requiring wide dynamic range. | Select THS4561IRGET when ultra-low noise and GHz bandwidth outweigh supply voltage and VOCM flexibility requirements. |
| ADA4940-1ACPZ-R7 | Lower quiescent current (10.5 mA), higher CMRR (105 dB), but narrower bandwidth (575 MHz GBW); same ±15 V rating and VOCM control. | Preferred for battery-powered portable instruments where power efficiency and CMRR dominate over raw speed. | Choose ADA4940-1ACPZ-R7 when optimizing for power-constrained, high-precision measurement systems needing superior CMRR over bandwidth. |
Compared with THS4131CDGN, THS4561IRGET trades supply voltage headroom and VOCM configurability for RF-grade noise and bandwidth, while ADA4940-1ACPZ-R7 prioritizes power efficiency and CMRR at the expense of small-signal bandwidth - making THS4131CDGN optimal for ±15 V, wide-dynamic-range, medium-bandwidth instrumentation.
Availability
THS4131CDGN is available at Aetrix Electronics and suitable for medical imaging systems, precision data acquisition modules, industrial process controllers, and test equipment requiring stable component supply across extended temperature ranges.
Supply support for THS4131CDGN 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 company specializing in analog and embedded processing technologies, with leadership in high-performance amplifiers, data converters, and power management ICs.
The THS413x family was designed for high-fidelity, wideband differential signal conditioning in ultrasound, instrumentation, and communications infrastructure - emphasizing low noise, high linearity, and robust thermal performance in compact packages.
FAQ
What is the maximum supply voltage for THS4131CDGN?
The THS4131CDGN supports dual-supply operation up to ±15 V or single-supply operation from 5 V to 30 V. Absolute maximum supply voltage is 33 V (VCC+ to VCC−), but recommended operating conditions specify ±15 V for optimal distortion and bandwidth performance. Exceeding ±15 V risks increased quiescent current and thermal stress without proportional gain in dynamic range.
Does THS4131CDGN have a power-down feature?
No, THS4131CDGN does not include a power-down pin or shutdown mode. Unlike the THS4130CDGN, which features an active-low PD pin, the THS4131CDGN operates continuously. This simplifies power sequencing but means quiescent current remains at 13 mA (±15 V) regardless of signal activity - a design trade-off favoring simplicity over ultra-low-power operation.
How should the thermal pad on the THS4131CDGN HVSSOP-8 package be connected?
The exposed thermal pad on the THS4131CDGN must be soldered to a large PCB copper pour for effective heat dissipation. It is electrically isolated from the die and may connect to any net - typically tied to VCC− or ground. Per TI SLMA002/SLMA004, minimum pad size is 3.5 mm × 3.5 mm with ≥4 thermal vias (0.3-mm diameter) to inner ground planes to achieve RθJB = 30.0 °C/W and prevent junction temperature exceedance at full load.
What is the role of the VOCM pin on THS4131CDGN?
The VOCM pin on THS4131CDGN sets the DC common-mode voltage of the differential output pair. Applying a low-impedance voltage (e.g., from a precision DAC or resistor divider) directly establishes VOUT,CM = VOCM. If left floating, it defaults to (VCC+ + VCC−)/2. A 0.1-µF bypass capacitor is required to minimize noise coupling, and output-stage current increases proportionally with VOCM deviation from mid-rail - affecting thermal design.
Can THS4131CDGN drive heavy capacitive loads?
THS4131CDGN is not unity-gain stable into direct capacitive loads >10 pF due to internal compensation optimized for bandwidth. To drive such loads (e.g., ADC input capacitance or long cables), place a 20-Ω series resistor at each output (VOUT+ and VOUT−). This isolates the amplifier from capacitive reactance, restores phase margin, and prevents ringing or oscillation - verified in Figure 9-1 of the datasheet.
THS4131CDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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
THS4131CDGN FAQ
1.How can I place an order for THS4131CDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4131CDGN 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 THS4131CDGN reliable?
The price and inventory of THS4131CDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4131CDGN is usually 5 days.
3.What payment methods are accepted for THS4131CDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4131CDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4131CDGN?
THS4131CDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4131CDGN 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 THS4131CDGN?
For technical support, including THS4131CDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4131CDGN requirements.
6.How does Aetrix verify that THS4131CDGN is sourced from the original manufacturer or authorized distributors?
All THS4131CDGN 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 THS4131CDGN meets industry standards.
7.What is the process for return or replacement of THS4131CDGN?
All THS4131CDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4131CDGN, 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 THS4131CDGN part is unused and in its original packaging.
Return procedure for THS4131CDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4131CDGN 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…
