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Texas Instruments THS4140CDGN
- Part No.:
- THS4140CDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4140CDGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,664
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Product details
Overview
THS4140CDGN from Texas Instruments is a high-speed fully differential amplifier designed for single-ended-to-differential conversion and precision ADC driving. It delivers 160 MHz –3 dB bandwidth (±15 V supply), 450 V/µs slew rate, –79 dB third-harmonic distortion at 1 MHz, and 6.5 nV/√Hz input-referred voltage noise in an MSOP PowerPAD™ (DGN-8) package.
For engineers reviewing the THS4140CDGN datasheet, THS4140CDGN pinout, THS4140CDGN application, or THS4140CDGN equivalent, key selection criteria include differential output impedance control, VOCM pin functionality for common-mode level setting, shutdown current of 0.88 mA, and thermal management via exposed thermal pad in DGN-8 packaging.
Technical Context
The THS4140CDGN implements a true fully differential signal path from input to output using TI's BiComI complementary bipolar process, enabling balanced rejection of common-mode noise at both input and power supply terminals. Its symmetrical architecture inherently suppresses second-harmonic distortion and improves PSRR and CMRR beyond conventional op-amps.
It supports flexible biasing with VOCM pin controlling output common-mode voltage (midrail by default), and features an active-low PD (pin 6) enabling shutdown mode with 0.88 mA quiescent current and >1 MΩ output impedance. The device operates from ±2.5 V to ±15 V dual supply or 5 V to 30 V single supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - enables wideband signal conditioning up to UHF range without gain peaking. |
| Slew Rate | 450 V/µs - supports fast transient response for high-fidelity pulse and video applications. |
| THD @ 1 MHz | –79 dB differential-in/differential-out - ensures low distortion when driving 16-bit+ ADCs. |
| Input Voltage Noise | 6.5 nV/√Hz at 10 kHz - preserves SNR in precision analog front-ends. |
| Shutdown Current | 0.88 mA - reduces system power during idle cycles without full rail disconnect. |
| Common-Mode Input Range | –4 V to +4.5 V at ±5 V supply - accommodates wide input signal excursions before clipping. |
| Output Swing | ±12.9 V at ±15 V supply - delivers full-rail differential output headroom for maximum dynamic range. |
Pinout & Package
THS4140CDGN is housed in an 8-pin MSOP PowerPAD™ (DGN-8) package with an exposed thermal pad on the underside requiring solder connection to PCB copper for thermal dissipation. The package footprint matches industry-standard MSOP-8 but includes enhanced thermal performance via the PowerPAD™ structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN− | Inverting input | Differential input node; requires matched external feedback network for gain stability. |
| 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 | Accepts +2.5 V to +15 V (dual) or +5 V to +30 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−; forms balanced pair for ADC interface. |
| 5: VIN+ | Non-inverting input | Differential input node; symmetric layout critical to preserve CMRR above 10 MHz. |
| 6: PD | Power-down enable | Active-low shutdown control; tie to VCC− to enter low-power state (ICC(SD) = 0.88 mA). |
| 7: VCC− | Negative supply | Accepts –2.5 V to –15 V (dual); internal 50 kΩ pull-up to VCC+ keeps PD active if left floating. |
| 8: VOUT− | Negative differential output | Delivers non-inverted-phase signal relative to VOUT+; maintains 180° phase relationship for noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables true differential signaling end-to-end, rejecting coupled noise at input, output, and supply rails simultaneously. |
| VOCM pin with midrail default | Allows precise DC-level alignment of differential outputs to match ADC reference without external resistive dividers. |
| PowerPAD™ thermal enhancement | Exposes die thermal pad on package underside; requires soldered PCB copper area to maintain junction temperature ≤125°C at full load. |
| Active-low shutdown (PD) | Reduces ICC to 0.88 mA while placing outputs in high-impedance state (>1 MΩ), enabling dynamic power gating in battery-sensitive systems. |
| Wide supply range support | Operates from 5 V single supply to ±15 V dual supply - simplifies integration across mixed-voltage data acquisition platforms. |
Applications
| High-Speed Data Acquisition | Differential ADC Driver |
|---|---|
Use Scenario: Driving 16-bit, 100 MSPS pipeline ADCs in radar digitizers requiring low THD and wide bandwidth. IC Role / Device Role / Timing Role: Single-ended input signal conditioner and differential output driver with VOCM referenced to ADC VREF. Use Value: Delivers –79 dB THD at 1 MHz and 160 MHz bandwidth to preserve ENOB across full Nyquist band. | Use Scenario: Interfacing precision SAR ADCs (e.g., ADS8860) with unbalanced sensor outputs in industrial PLC modules. IC Role / Device Role / Timing Role: Fully differential amplifier configured as unity-gain single-ended-to-differential converter. Use Value: Eliminates need for external balun transformers while maintaining >84 dB CMRR up to 10 MHz. |
| Communications Baseband | Medical Imaging Front-End |
Use Scenario: Transmitting baseband I/Q signals in LTE femtocell transceivers where spectral purity is critical. IC Role / Device Role / Timing Role: Differential transmitter stage shaping analog I/Q paths prior to upconversion. Use Value: Achieves –103 dBc intermodulation distortion at 5 MHz, meeting ACLR requirements for Class 3 RF stages. | Use Scenario: Conditioning photodiode or CT detector signals in portable ultrasound beamformers. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate differential driver feeding multiplexed ADC arrays. Use Value: 6.5 nV/√Hz input noise and 450 V/µs slew rate preserve transient fidelity of microsecond-scale echo pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4141CDGN | Lacks PD pin; no shutdown capability; otherwise identical AC/DC specs and pinout. | Not suitable for power-gated systems requiring standby mode; preferred where always-on operation is acceptable. | Select THS4141CDGN only if shutdown functionality is unnecessary and cost minimization is prioritized. |
| THS4131CDGN | Lower 150 MHz bandwidth, higher 51 V/µs slew rate, lower 1.3 nV/√Hz noise, no PD pin. | Better for ultra-low-noise, moderate-bandwidth applications (e.g., audio ADCs); unsuitable for >150 MHz signal chains. | Choose THS4131CDGN when noise floor dominates over bandwidth, and shutdown is not required. |
Compared with THS4140CDGN, THS4141CDGN removes shutdown capability while retaining identical performance, whereas THS4131CDGN trades bandwidth for lower noise and higher slew rate-making each alternative optimal only under specific signal chain constraints.
Availability
THS4140CDGN is available at Aetrix Electronics and suitable for high-speed data acquisition, communications baseband, medical imaging front-end, and precision test equipment requiring stable component supply and long-term manufacturability.
Supply support for THS4140CDGN 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 over 50 years of innovation in high-performance amplifiers.
The THS4140CDGN belongs to TI's High-Speed Fully Differential I/O Amplifier family, engineered specifically for precision differential signal conditioning in data converter interfaces and wideband communication systems.
FAQ
What is the function of the PD pin on the THS4140CDGN?
The PD (Power-Down) pin on the THS4140CDGN is an active-low control terminal that places the device into low-power shutdown mode when pulled below 1.4 V above VCC−. In this state, quiescent current drops to 0.88 mA and output impedance exceeds 1 MΩ. The THS4140CDGN remains fully functional upon exit from shutdown, with no reset or initialization delay required.
How does the VOCM pin affect THS4140CDGN output behavior?
The VOCM pin on the THS4140CDGN sets the common-mode DC voltage level of both differential outputs (VOUT+ and VOUT−). When left unconnected, it defaults to midrail (e.g., VCC/2 for single supply). Applying an external voltage allows precise alignment to ADC reference levels. A 0.1 µF bypass capacitor is mandatory to prevent noise injection, as specified in the THS4140CDGN datasheet.
Can THS4140CDGN operate from a single 5-V supply?
Yes, the THS4140CDGN supports single-supply operation from 5 V to 30 V. At 5 V, its common-mode input range is –4 V to +4.5 V and output swing reaches 1.2 V to 3.8 V (single-ended) or ±1.9 V differential. VOCM defaults to 2.5 V, enabling direct interfacing with 5-V ADCs having rail-to-rail input ranges. Full AC performance is maintained per THS4140CDGN electrical characteristics tables.
Why is thermal pad soldering required for THS4140CDGN in DGN-8 package?
The THS4140CDGN in DGN-8 package integrates a PowerPAD™ thermal pad on its underside that provides direct thermal conduction from the die to the PCB. Without soldering this pad to a thermally conductive copper plane, junction temperature can exceed 125°C under load, degrading distortion performance and reliability. TI specifies θJC = 4.7°C/W and requires ≥1.71 W power rating compliance - achievable only with proper pad soldering per SLMA002 guidelines.
What resistor tolerance is recommended for THS4140CDGN feedback networks?
Texas Instruments recommends 1% or better tolerance for all external resistors in THS4140CDGN feedback and gain-setting networks. Mismatch greater than 0.1% degrades CMRR, PSRR, and second-harmonic cancellation - directly impacting THD performance. For example, at 1 MHz, 0.5% mismatch increases second-harmonic distortion by >10 dB versus matched 0.1% resistors, as validated in THS4140CDGN application notes.
THS4140CDGN 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4140CDGN FAQ
1.How can I place an order for THS4140CDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4140CDGN 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 THS4140CDGN reliable?
The price and inventory of THS4140CDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4140CDGN is usually 5 days.
3.What payment methods are accepted for THS4140CDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4140CDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4140CDGN?
THS4140CDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4140CDGN 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 THS4140CDGN?
For technical support, including THS4140CDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4140CDGN requirements.
6.How does Aetrix verify that THS4140CDGN is sourced from the original manufacturer or authorized distributors?
All THS4140CDGN 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 THS4140CDGN meets industry standards.
7.What is the process for return or replacement of THS4140CDGN?
All THS4140CDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4140CDGN, 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 THS4140CDGN part is unused and in its original packaging.
Return procedure for THS4140CDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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