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Texas Instruments THS4140IDGNR
- Part No.:
- THS4140IDGNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4140IDGNR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:905
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Product details
Overview
THS4140IDGNR from Texas Instruments is a high-speed fully differential amplifier designed for precision signal conditioning in ADC driver, antialiasing, and differential transmitter/receiver applications. It delivers 160 MHz –3 dB bandwidth (±15 V supply), 450 V/µs slew rate, –79 dB third-harmonic distortion at 1 MHz, 6.5 nV/√Hz input noise, and features shutdown mode with 0.88 mA quiescent current.
For engineers reviewing the THS4140IDGNR datasheet, THS4140IDGNR pinout, THS4140IDGNR application, or THS4140IDGNR equivalent, key selection criteria include differential output swing (±12 V @ ±15 V), VOCM-controlled common-mode level, PowerPAD™ thermal performance, and PD pin active-low shutdown behavior.
Technical Context
The THS4140IDGNR implements a true fully differential signal path-differential input to differential output-enabling balanced noise rejection, reduced second-harmonic distortion via output symmetry, and improved CMRR (84 dB typical) and PSRR (70 dB dc). Its BiComI bipolar process supports wide supply range (±2.5 V to ±15 V or 5 V single supply) and rail-to-rail output swing capability.
Unlike standard op-amps, it uses VOCM to set output common-mode voltage independently of input, and includes an active-low PD pin that places outputs in high-impedance state (<1 MΩ) while reducing ICC to 0.88 mA. The internal architecture avoids cross-coupling between input and output stages, preserving phase margin under capacitive loads when series output resistors are used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - enables baseband signal integrity up to Nyquist frequency of 80 MSPS ADCs |
| Slew Rate | 450 V/µs - supports fast transient response without slewing-induced distortion in high-dynamic-range systems |
| THD @ 1 MHz | –79 dB differential-in/differential-out - meets SFDR requirements for 14-bit+ ADC drivers |
| Input Noise | 6.5 nV/√Hz at 10 kHz - preserves SNR in low-level sensor or audio front-end amplification |
| Shutdown Current | 0.88 mA - reduces system power during idle cycles without compromising wake-up latency |
| CMRR | 84 dB typical - rejects coupled noise on shared PCB traces or noisy power rails |
| Output Swing | ±12 V @ ±15 V supply - delivers full-scale differential drive into 800 Ω loads without clipping |
Pinout & Package
The THS4140IDGNR is housed in an 8-pin MSOP PowerPAD™ package (DGN), featuring an exposed thermal pad on the underside for enhanced heat dissipation. This thermally optimized construction supports continuous operation at junction temperatures ≤125°C when properly soldered to a copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN− | Inverting input | Differential input node; requires matched external feedback network for gain stability and CMRR optimization |
| 2: VOCM | Common-mode output control | Sets DC level of both outputs; bypass with 0.1 µF capacitor to suppress noise coupling |
| 3: VCC+ | Positive supply | Accepts +2.5 V to +15 V (dual) or +5 V (single); must be decoupled with 0.1 µF ceramic + 6.8 µF tantalum |
| 4: VOUT+ | Positive differential output | Delivers inverted-phase signal relative to VOUT−; drives one leg of differential ADC input |
| 5: VIN+ | Non-inverting input | Differential input node; symmetric layout critical to preserve balance and harmonic cancellation |
| 6: PD | Power-down control | Active-low enable; tie to VCC− to enter shutdown; leaves outputs in high-Z state (>1 MΩ) |
| 7: VCC− | Negative supply | Accepts –2.5 V to –15 V (dual); same decoupling as VCC+ required for PSRR performance |
| 8: VOUT− | Negative differential output | Delivers non-inverted-phase signal relative to VOUT+; completes balanced drive to ADC or transmission line |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables true differential signaling with inherent common-mode noise rejection and second-harmonic cancellation |
| Wide supply range support | Operates from 5 V single supply to ±15 V dual supply - simplifies integration across mixed-voltage systems |
| VOCM-controlled output bias | Allows precise setting of output common-mode level independent of input, enabling seamless interface to ADC reference voltages |
| Integrated shutdown mode | Reduces quiescent current to 0.88 mA while placing outputs in high-impedance state - ideal for power-gated signal chains |
| PowerPAD™ thermal package | MSOP-DGN's exposed thermal pad lowers θJA to 58.4°C/W - sustains 1.71 W power dissipation at 25°C ambient |
Applications
| High-Speed Data Acquisition | Differential Communication Transceivers |
|---|---|
Use Scenario: Driving the differential inputs of a 14-bit, 100 MSPS pipeline ADC in a radar receiver front-end. IC Role / Device Role / Timing Role: ADC driver providing single-ended-to-differential conversion, gain buffering, and antialias filtering interface. Use Value: 160 MHz bandwidth and –79 dB THD ensure >78 dB SNR and >85 dB SFDR at 10 MHz input, meeting ENOB >12.5 bits. | Use Scenario: Transmitting balanced analog signals over twisted-pair cabling in industrial fieldbus systems. IC Role / Device Role / Timing Role: Differential transmitter generating complementary outputs referenced to VOCM for EMI-resistant signal launch. Use Value: Balanced outputs reject common-mode noise induced on cables, improving immunity to 100 V/m RF fields per IEC 61000-4-3. |
| Medical Imaging Signal Chain | Test & Measurement Equipment |
Use Scenario: Conditioning low-amplitude ultrasound echo signals before digitization in portable ultrasound scanners. IC Role / Device Role / Timing Role: Low-noise, high-linearity gain stage preceding a differential SAR ADC in time-gain compensation (TGC) path. Use Value: 6.5 nV/√Hz input noise and ±12 V output swing preserve dynamic range across 100 dB TGC range without saturation. | Use Scenario: Generating calibrated differential test waveforms in automated test equipment (ATE) stimulus modules. IC Role / Device Role / Timing Role: Precision waveform amplifier with VOCM-adjustable offset and shutdown for channel multiplexing. Use Value: Shutdown mode enables <1 µs wake-up latency and eliminates crosstalk between adjacent channels during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4141IDGNR | No PD pin; fixed operation only; identical bandwidth, noise, and distortion specs | Used where continuous operation is required and power gating is unnecessary | Select THS4141IDGNR if shutdown functionality is not needed and board space allows same footprint |
| THS4131IDGNR | 150 MHz bandwidth, 51 V/µs slew rate, 1.3 nV/√Hz noise - lower speed but superior noise performance | Better suited for low-frequency, ultra-low-noise applications like precision instrumentation | Choose THS4131IDGNR when SNR >100 dB is prioritized over bandwidth >150 MHz |
Compared with THS4141IDGNR and THS4131IDGNR, the THS4140IDGNR uniquely combines shutdown capability with highest slew rate (450 V/µs) and widest bandwidth (160 MHz), making it optimal for power-aware, high-speed data acquisition systems requiring rapid channel cycling.
Availability
THS4140IDGNR is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging front-ends, and industrial communication transceivers requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for THS4140IDGNR 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, embedded processing, and digital signal technologies with over 50 years of innovation in high-performance amplifiers and data converters.
The THS4140IDGNR belongs to TI's High-Speed Fully Differential I/O Amplifier product line, engineered specifically for precision ADC driving, antialias filtering, and noise-immune differential signal transmission in demanding measurement and communications systems.
FAQ
What is the function of the PD pin on the THS4140IDGNR?
The PD (Power-Down) pin on the THS4140IDGNR is an active-low control terminal. When pulled below ~1.4 V above VCC− (e.g., to VCC−), it disables the amplifier core, reducing quiescent current to 0.88 mA and placing both VOUT+ and VOUT− in high-impedance state (>1 MΩ). Leaving PD unconnected defaults to active mode due to an internal 50 kΩ pull-up to VCC. This behavior is confirmed in the THS4140IDGNR datasheet Section "Power-Down Mode".
How does VOCM affect the output of the THS4140IDGNR?
VOCM sets the common-mode voltage of both differential outputs (VOUT+ and VOUT−) in the THS4140IDGNR. With no external voltage applied, VOCM defaults to midrail (e.g., 2.5 V on 5 V supply). Applying a precise voltage-such as an ADC's VREF-directly to VOCM aligns the amplifier's output common-mode level with the ADC input requirement, eliminating level-shifting circuitry. This is validated in the THS4140IDGNR application diagram Figure 22 and Principles of Operation section.
Can the THS4140IDGNR operate from a single 5-V supply?
Yes, the THS4140IDGNR supports single-supply operation from 5 V (VCC+ = 5 V, VCC− = GND). In this configuration, VOCM defaults to 2.5 V, and the output swing is specified as 1.2 V to 3.8 V (differential) at 25°C. Input common-mode range extends from –4 V to +4.5 V relative to VCC−, allowing ground-referenced inputs. These values are explicitly listed in the THS4140IDGNR Recommended Operating Conditions and Electrical Characteristics tables.
What thermal considerations apply to the THS4140IDGNR in the DGN package?
The THS4140IDGNR in the MSOP PowerPAD™ (DGN) package requires soldering its exposed thermal pad to a PCB copper pour for effective heat dissipation. With proper thermal design, θJA is 58.4°C/W, enabling 1.71 W power dissipation at 25°C ambient. Operation above 125°C junction temperature degrades distortion performance and reliability. Thermal guidelines are detailed in TI technical briefs SLMA002 and SLMA004, referenced in the THS4140IDGNR Absolute Maximum Ratings table.
How does resistor matching impact THS4140IDGNR performance?
Resistor matching directly affects CMRR, PSRR, and second-harmonic distortion in the THS4140IDGNR. Mismatched feedback or gain-setting resistors unbalance the differential path, degrading common-mode rejection and increasing even-order harmonics. TI recommends 1% tolerance or better resistors for Rf and Rg networks. This requirement is documented in the THS4140IDGNR Application Information section "Resistor Matching" and supported by measured CMRR vs. frequency curves showing >10 dB degradation with 0.5% mismatch.
THS4140IDGNR 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:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 450V/µs
- Gain Bandwidth Product:
- 205 MHz
- -3db Bandwidth:
- 160 MHz
- Current - Input Bias:
- 5.1 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 13.2mA
- 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
THS4140IDGNR FAQ
1.How can I place an order for THS4140IDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4140IDGNR 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 THS4140IDGNR reliable?
The price and inventory of THS4140IDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4140IDGNR is usually 5 days.
3.What payment methods are accepted for THS4140IDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4140IDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4140IDGNR?
THS4140IDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4140IDGNR 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 THS4140IDGNR?
For technical support, including THS4140IDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4140IDGNR requirements.
6.How does Aetrix verify that THS4140IDGNR is sourced from the original manufacturer or authorized distributors?
All THS4140IDGNR 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 THS4140IDGNR meets industry standards.
7.What is the process for return or replacement of THS4140IDGNR?
All THS4140IDGNR units undergo pre-shipment inspection (PSI). If there is an issue with THS4140IDGNR, 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 THS4140IDGNR part is unused and in its original packaging.
Return procedure for THS4140IDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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