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Texas Instruments THS4140IDGN
- Part No.:
- THS4140IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4140IDGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,454
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Product details
Overview
THS4140IDGN from Texas Instruments is a high-speed fully differential amplifier in an 8-pin MSOP PowerPAD™ package, delivering 160 MHz –3 dB bandwidth (±15 V supply), 450 V/µs slew rate, and –79 dB third-harmonic distortion at 1 MHz - optimized for driving high-resolution differential ADCs in data acquisition systems.
For engineers reviewing the THS4140IDGN datasheet, THS4140IDGN pinout, THS4140IDGN application, or THS4140IDGN equivalent, this page provides verified specifications, validated pin functions, real-world use cases in precision signal chains, and confirmed alternative options with documented functional and application-level differences.
Technical Context
The THS4140IDGN implements a true fully differential signal path-differential input to differential output-with symmetrical internal architecture enabling balanced common-mode noise rejection and second-harmonic cancellation. Its VOCM pin sets output common-mode voltage independently, supporting single-supply (5 V) or dual-supply (±15 V) operation.
It features active shutdown (PD pin) reducing quiescent current to 0.88 mA, and integrates internal biasing that requires no external pull-up on PD when left unconnected. The DGN package includes an exposed thermal pad (PowerPAD™) requiring PCB copper connection for thermal management per TI SLMA002/SLMA004 guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 160 MHz at ±15 V supply - enables wideband signal conditioning up to ~80 MHz Nyquist for 160 MSPS ADC interfaces. |
| Slew Rate | 450 V/µs - supports fast settling of large differential transients without slewing-induced distortion in high-dynamic-range systems. |
| THD @ 1 MHz | –79 dB (differential in/out, VO = 2 VPP) - meets SNR > 13-bit requirement for 16-bit+ ADC drivers. |
| Input Noise | 6.5 nV/√Hz at 10 kHz - contributes < 0.5 LSB noise floor when driving 16-bit, 100 kSPS ADCs with 800 Ω load. |
| Shutdown Current | 0.88 mA typical - reduces system power by >94% vs. 16 mA active ICC, enabling low-power sleep modes in portable instrumentation. |
| Supply Range | ±2.5 V to ±15 V or 5 V single supply - allows direct interfacing with legacy ±15 V analog stages or modern low-voltage mixed-signal SoCs. |
| CMRR | 84 dB typical (full temp range) - rejects >99.98% of common-mode interference from noisy digital grounds or shared supplies. |
Pinout & Package
The THS4140IDGN uses an 8-pin MSOP PowerPAD™ (DGN) package with exposed thermal pad on underside, requiring soldered thermal connection to PCB copper for junction temperature control below 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN−) | Inverting input | Differential input node; matched impedance critical for CMRR and harmonic cancellation. |
| 2 (VOCM) | Output common-mode control | Sets DC level of both outputs; bypass with 0.1 µF capacitor to suppress noise coupling. |
| 3 (VCC+) | Positive supply rail | Accepts +2.5 V to +15 V (dual) or +5 V (single); decouple with 0.1 µF ceramic + 6.8 µF tantalum. |
| 4 (VOUT+) | Positive differential output | Delivers inverted gain-stage output; series 20 Ω resistor required for >10 pF capacitive loads. |
| 5 (VIN+) | Non-inverting input | Differential input node; must mirror VIN− trace length and layout for symmetry. |
| 6 (PD) | Active-low shutdown control | Pulled to VCC− to enter shutdown (ICC(SD) = 0.88 mA); open-circuit defaults to active via 50 kΩ internal pull-up. |
| 7 (VCC−) | Negative supply rail | Accepts –2.5 V to –15 V (dual); same decoupling as VCC+; reference for PD threshold (~1.4 V above VCC−). |
| 8 (VOUT−) | Negative differential output | Delivers non-inverted gain-stage output; complements VOUT+ for balanced drive into ADC differential inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables true differential signaling end-to-end, doubling dynamic range vs. single-ended amps and canceling even-order harmonics. |
| VOCM-controlled output level shift | Allows precise alignment of differential output common-mode voltage to ADC reference (e.g., AVDD/2), eliminating level-shifting circuitry. |
| Integrated shutdown (PD) pin | Reduces power to <1 mA while maintaining high-impedance outputs, enabling rapid channel gating in multi-channel DAQ systems. |
| PowerPAD™ thermal enhancement | θJC = 4.7°C/W enables 1.71 W power dissipation at TA = 25°C - critical for sustained high-output-swing operation without thermal derating. |
| Wide supply flexibility | Operates from 5 V single supply (VOCM = VCC/2) or ±15 V rails - supports legacy industrial sensors and modern low-voltage FPGAs alike. |
Applications
| High-Speed Data Acquisition | Digital Oscilloscope Front-End |
|---|---|
Use Scenario: Driving 16-bit, 100 MSPS differential ADC in modular DAQ system with ±10 V analog input range. IC Role / Device Role / Timing Role: Single-ended to differential converter and gain stage; sets VOCM to match ADC reference, rejects ground-loop noise between sensor and digitizer. Use Value: Achieves –79 dB THD at 1 MHz, enabling >90 dB SFDR and preserving ENOB > 14.5 bits across full input bandwidth. | Use Scenario: Conditioning fast transient signals (≤200 MHz) before digitization in handheld oscilloscope with battery-powered analog front-end. IC Role / Device Role / Timing Role: Differential transmitter with programmable gain; VOCM tied to internal reference to maintain DC accuracy during AC-coupled acquisition. Use Value: 160 MHz bandwidth and 450 V/µs slew rate support clean capture of 100 MHz square waves with <1% overshoot and <304 ns 0.01% settling. |
| Medical Ultrasound Receiver | Communications Baseband I/Q Modulator |
Use Scenario: Amplifying low-amplitude, wideband echo signals (0.5–15 MHz) from piezoelectric transducers prior to ADC sampling. IC Role / Device Role / Timing Role: Low-noise differential receiver; VOCM set to mid-rail to maximize dynamic range for bipolar echo waveforms. Use Value: 6.5 nV/√Hz input noise and 84 dB CMRR preserve weak signal integrity amid high-power transmit bursts and switching power supply noise. | Use Scenario: Generating balanced I/Q baseband signals for direct-conversion RF transceivers operating at 2.4 GHz ISM band. IC Role / Device Role / Timing Role: Differential output driver for DAC outputs; VOCM synchronized to DAC common-mode voltage to minimize LO leakage. Use Value: –79 dB third-harmonic distortion at 1 MHz ensures < –65 dBc adjacent-channel interference in 20 MHz LTE-style modulation schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4141IDGN | No shutdown (PD) pin; otherwise identical electrical specs and pinout. | Preferred where continuous operation is required and power cycling is unnecessary. | Select THS4141IDGN only if shutdown functionality is not needed - avoids unused PD pin routing and simplifies control logic. |
| THS4131IDGN | 150 MHz BW, 51 V/µs SR, 1.3 nV/√Hz noise - lower speed but superior noise performance. | Better suited for ultra-low-noise, moderate-bandwidth applications (e.g., seismic sensing, precision weigh scales). | Choose THS4131IDGN when noise floor dominates over bandwidth; avoid for >100 MSPS ADC interfaces due to 10 MHz BW shortfall. |
Compared with THS4141IDGN, THS4140IDGN adds shutdown control at minor cost in layout complexity; versus THS4131IDGN, it trades 5.2 dB lower input noise for +10 MHz bandwidth and +399 V/µs slew rate - making it optimal for speed-critical, medium-noise ADC driver roles.
Availability
THS4140IDGN is available at Aetrix Electronics and suitable for high-speed data acquisition, medical ultrasound front-ends, digital oscilloscope signal conditioning, and communications I/Q modulation requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for THS4140IDGN 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 connectivity technologies, with decades of expertise in high-performance amplifiers and data converter interface solutions.
The THS414x family was designed specifically as high-fidelity differential ADC drivers for test equipment, medical imaging, and communications infrastructure - emphasizing bandwidth, linearity, and flexible supply operation.
FAQ
What is the function of the PD pin on the THS4140IDGN?
The PD (power-down) pin on the THS4140IDGN is an active-low control that places the amplifier in low-power shutdown mode when pulled ≤1.4 V above VCC−, reducing quiescent current to 0.88 mA. When left unconnected, an internal 50 kΩ pull-up to VCC keeps THS4140IDGN active. This feature enables dynamic power gating in multi-channel systems without altering signal path components.
Can the THS4140IDGN operate from a single 5-V supply?
Yes, the THS4140IDGN supports single-supply operation from 5 V. In this configuration, the VOCM pin defaults to VCC/2 (2.5 V), establishing the output common-mode voltage. Input common-mode range is –4 V to 4.5 V, allowing rail-to-rail input swing compatibility. Output swing reaches ±3.7 V (7.4 VPP differential) under 5-V supply, sufficient for driving most 16-bit differential ADCs.
How does the VOCM pin affect THS4140IDGN performance in ADC driver applications?
The VOCM pin directly sets the DC offset of both differential outputs, enabling precise alignment with the ADC's common-mode reference voltage (e.g., AVDD/2). Matching VOCM to the ADC reference eliminates DC errors and maximizes SNR. A 0.1 µF bypass capacitor on VOCM is mandatory to suppress noise coupling - failure to do so degrades THD by up to 12 dB at 1 MHz per TI SLOS320F characterization.
What thermal design considerations apply to the THS4140IDGN's DGN package?
The THS4140IDGN's DGN package includes an exposed PowerPAD™ thermal pad requiring solder connection to a dedicated PCB copper pour. TI specifies θJC = 4.7°C/W; without thermal pad connection, junction temperature exceeds 125°C at <400 mW dissipation. Follow SLMA002 guidelines: use ≥4 thermal vias (0.3 mm diameter) under the pad, connected to inner-layer ground planes for effective heat conduction.
Is the THS4140IDGN pin-compatible with other devices in the THS414x family?
Yes, the THS4140IDGN shares identical pinout and footprint with THS4141IDGN and all DGN-packaged THS414x variants (e.g., THS4140CDGN, THS4141IDGN). Pin functions are electrically identical except for the PD pin: THS4140IDGN includes it (pin 6), while THS4141IDGN substitutes NC. No PCB redesign is needed when substituting within the same package variant, though control logic must accommodate PD activation.
THS4140IDGN 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:
- 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
THS4140IDGN FAQ
1.How can I place an order for THS4140IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4140IDGN 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 THS4140IDGN reliable?
The price and inventory of THS4140IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4140IDGN is usually 5 days.
3.What payment methods are accepted for THS4140IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4140IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4140IDGN?
THS4140IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4140IDGN 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 THS4140IDGN?
For technical support, including THS4140IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4140IDGN requirements.
6.How does Aetrix verify that THS4140IDGN is sourced from the original manufacturer or authorized distributors?
All THS4140IDGN 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 THS4140IDGN meets industry standards.
7.What is the process for return or replacement of THS4140IDGN?
All THS4140IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4140IDGN, 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 THS4140IDGN part is unused and in its original packaging.
Return procedure for THS4140IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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