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Texas Instruments THS4140IDGK
- Part No.:
- THS4140IDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4140IDGK.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,347
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Product details
Overview
THS4140IDGK 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. It functions as a precision single-ended-to-differential converter and ADC driver in high-fidelity data acquisition systems.
For engineers reviewing the THS4140IDGK datasheet, THS4140IDGK pinout, THS4140IDGK application, or THS4140IDGK equivalent, key selection criteria include differential output impedance matching, VOCM pin biasing for DC level control, shutdown current of 0.88 mA, and thermal management via the exposed PowerPAD™ thermal pad.
Technical Context
The THS4140IDGK implements a true fully differential signal path-differential input to differential output-enabling balanced noise rejection and cancellation of even-order harmonics. Its internal architecture supports precise common-mode output voltage control via the VOCM pin and features an active-low power-down (PD) terminal that reduces quiescent current to 0.88 mA while raising output impedance above 1 MΩ.
It operates across a wide supply range (±2.5 V to ±15 V dual or 5 V single supply), maintains >75 dB CMRR over temperature, and achieves 6.5 nV/√Hz input-referred voltage noise at 10 kHz-critical for low-noise, high-SFDR signal chains feeding precision ADCs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - enables baseband signal conditioning up to UHF frequencies without gain peaking. |
| Slew Rate | 450 V/µs - supports fast settling of large-swing differential signals into 800 Ω loads with 96 ns to 0.1%. |
| THD @ 1 MHz | –79 dB (differential in/out, VO = 2 VPP) - ensures minimal harmonic contamination in ADC front-ends. |
| Input Voltage Noise | 6.5 nV/√Hz at 10 kHz - preserves SNR in high-resolution (≥16-bit) sampling systems. |
| Shutdown Current | 0.88 mA - reduces system power during idle cycles without compromising wake-up latency. |
| Common-Mode Input Range | –4 V to +4.5 V at ±5 V supply - accommodates rail-to-rail input signals when referenced to mid-supply. |
| Output Swing | ±12 V at ±15 V supply - delivers full-scale differential drive capability for 24-bit SAR and sigma-delta ADCs. |
Pinout & Package
The THS4140IDGK is housed in an 8-pin MSOP PowerPAD™ (DGK) package with an exposed thermal pad on the underside, requiring solder connection to a PCB copper pour for thermal integrity and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN− | Inverting input | Differential input node; matched impedance critical for CMRR and harmonic cancellation. |
| 2: VOCM | Common-mode output voltage 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); requires local 0.1 µF ceramic decoupling. |
| 4: VOUT+ | Positive differential output | Delivers inverted-phase signal relative to VOUT−; symmetric routing essential for skew control. |
| 5: VIN+ | Non-inverting input | Differential input node; must mirror VIN− trace length and impedance for optimal balance. |
| 6: PD | Power-down enable (active low) | Pulls to VCC− to enter shutdown; internal 50 kΩ pull-up to VCC keeps device active if left floating. |
| 7: VCC− | Negative supply | Accepts –2.5 V to –15 V (dual); connects to ground in single-supply configurations. |
| 8: VOUT− | Negative differential output | Delivers non-inverted-phase signal relative to VOUT+; forms true complementary pair with VOUT+. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables 2× dynamic range vs. single-ended amps by splitting 2 VPP signal into two 1 VPP anti-phase outputs. |
| Active-low shutdown (PD) pin | Reduces ICC to 0.88 mA while placing outputs in high-Z state (>1 MΩ), enabling rapid power cycling. |
| VOCM-controlled output common-mode | Allows precise DC alignment of differential outputs to match ADC reference voltage (e.g., AVDD/2). |
| PowerPAD™ thermal enhancement | Exposes die thermal pad on package underside; requires soldered copper area for junction temp ≤125°C at 125°C ambient. |
| High PSRR & CMRR | 70 dB PSRR and >75 dB CMRR up to 10 MHz - rejects supply ripple and board-level noise in mixed-signal systems. |
Applications
| Medical Ultrasound Beamforming | Communications Baseband Processing |
|---|---|
Use Scenario: Conditioning analog I/Q signals from RF demodulators before digitization in 5G NR and LTE transceivers. IC Role / Device Role / Timing Role: Differential ADC driver with VOCM alignment to match ADC's internal reference, minimizing offset-induced image rejection loss. Use Value: –79 dB THD at 1 MHz ensures <0.01% harmonic distortion in 12-bit+ IF sampling, preserving EVM and ACLR performance. | Use Scenario: Driving high-resolution ADCs in portable ultrasound scanners where space and thermal budget are constrained. IC Role / Device Role / Timing Role: Single-ended sensor signal to fully differential conversion with programmable output common-mode voltage. Use Value: 160 MHz bandwidth supports >40 MHz receive channel bandwidth; PowerPAD™ enables operation at 85°C ambient without derating. |
| Test & Measurement Equipment | Industrial Data Acquisition Systems |
Use Scenario: Front-end amplification in high-speed oscilloscope channels requiring low-noise, wide-bandwidth signal conditioning. IC Role / Device Role / Timing Role: High-fidelity differential transmitter with matched output impedance for 50 Ω transmission lines. Use Value: 450 V/µs slew rate enables accurate capture of fast transients; 6.5 nV/√Hz noise floor preserves small-signal resolution. | Use Scenario: Isolating and scaling analog sensor outputs (e.g., strain gauges, RTDs) before multiplexed ADC conversion in PLC modules. IC Role / Device Role / Timing Role: Precision differential driver with shutdown mode for power-gated channel banks. Use Value: 0.88 mA shutdown current reduces standby power per channel by >90%, extending battery life in portable DAQ units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4141IDGK | No shutdown (PD) pin; identical bandwidth, noise, and distortion specs. | Used where continuous operation is required and power cycling is unnecessary. | Select THS4141IDGK only if shutdown functionality is not needed-pinout differs (NC instead of PD on Pin 6). |
| THS4131IDGK | 150 MHz bandwidth, 51 V/µs slew rate, 1.3 nV/√Hz noise - lower speed but superior noise performance. | Better suited for ultra-low-noise, moderate-bandwidth (<100 MHz) precision measurement. | Choose THS4131IDGK when noise dominates over speed; avoid for >120 MHz signal paths due to bandwidth limitation. |
Compared with THS4141IDGK, THS4140IDGK adds power-down control at the cost of one dedicated pin; compared with THS4131IDGK, it trades 4.8× higher input noise for 7.4× faster slew rate and 10 MHz more bandwidth-making THS4140IDGK optimal for speed-critical ADC drivers.
Availability
THS4140IDGK is available at Aetrix Electronics and suitable for medical ultrasound beamforming, 5G baseband processing, test equipment front-ends, and industrial data acquisition systems requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for THS4140IDGK 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 decades of expertise in high-speed amplifier design and manufacturing.
The THS4140IDGK belongs to TI's High-Speed Fully Differential I/O Amplifier product line, engineered specifically for precision signal conditioning in high-bandwidth data converter interfaces and noise-sensitive instrumentation.
FAQ
What is the function of the PD pin on the THS4140IDGK?
The PD (Power-Down) pin on the THS4140IDGK is an active-low control input that places the amplifier in a low-power state when pulled below 1.4 V above VCC−. In shutdown, THS4140IDGK draws only 0.88 mA and its outputs enter a high-impedance state (>1 MΩ), enabling selective channel power gating in multi-channel systems without affecting adjacent circuitry.
How should the VOCM pin be configured for optimal THS4140IDGK performance?
The VOCM pin on the THS4140IDGK sets the DC common-mode level of both differential outputs and must be bypassed with a 0.1 µF ceramic capacitor to ground. For single-supply operation, connect VOCM to VCC/2; for dual-supply, tie it to a stable reference matching the ADC's common-mode input requirement-ensuring THS4140IDGK's output swing aligns precisely with the converter's input range.
Does the THS4140IDGK require external compensation for stability?
No, the THS4140IDGK is internally compensated for unity-gain stability across its specified supply range. However, when driving capacitive loads >10 pF, a 20 Ω series resistor must be added at each output to maintain phase margin and prevent ringing-this isolation also provides source-end impedance matching in 50 Ω transmission environments used with THS4140IDGK.
What thermal considerations apply to the THS4140IDGK's PowerPAD™ package?
The THS4140IDGK's DGK package incorporates an exposed thermal pad that must be soldered to a PCB copper pour connected to ground or a dedicated thermal plane. Without this connection, junction temperature can exceed 125°C under load, degrading distortion performance and long-term reliability. TI recommends ≥200 mm² of 2-oz copper with ≥4 thermal vias directly beneath the pad for operation at 85°C ambient.
Can the THS4140IDGK operate from a single 5-V supply?
Yes, the THS4140IDGK supports single-supply operation from 5 V. In this configuration, VCC− is connected to ground, VOCM is biased to 2.5 V (mid-supply), and the input common-mode range extends from –4 V to +4.5 V-allowing direct interfacing with sensors or DACs referenced to the same 5-V rail. Output swing reaches ±3.7 V differential under these conditions, sufficient for driving most 5-V differential ADCs.
THS4140IDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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-VSSOP
THS4140IDGK FAQ
1.How can I place an order for THS4140IDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4140IDGK 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 THS4140IDGK reliable?
The price and inventory of THS4140IDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4140IDGK is usually 5 days.
3.What payment methods are accepted for THS4140IDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4140IDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4140IDGK?
THS4140IDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4140IDGK 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 THS4140IDGK?
For technical support, including THS4140IDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4140IDGK requirements.
6.How does Aetrix verify that THS4140IDGK is sourced from the original manufacturer or authorized distributors?
All THS4140IDGK 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 THS4140IDGK meets industry standards.
7.What is the process for return or replacement of THS4140IDGK?
All THS4140IDGK units undergo pre-shipment inspection (PSI). If there is an issue with THS4140IDGK, 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 THS4140IDGK part is unused and in its original packaging.
Return procedure for THS4140IDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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