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Texas Instruments THS4140IDGNG4
- Part No.:
- THS4140IDGNG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4140IDGNG4.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,014
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Product details
Overview
THS4140IDGNG4 from Texas Instruments is a high-speed fully differential amplifier designed for precision analog signal conditioning in data acquisition systems. 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. Its key role is single-ended-to-differential conversion and driving high-resolution differential ADCs.
For engineers reviewing the THS4140IDGNG4 datasheet, THS4140IDGNG4 pinout, THS4140IDGNG4 application, or THS4140IDGNG4 equivalent, this page provides verified package mapping (MSOP PowerPAD™, DGN-8), validated shutdown functionality (PD pin), confirmed differential I/O architecture, and real-world design context for antialiasing filter interfaces and single-supply VOCM biasing.
Technical Context
The THS4140IDGNG4 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 nodes. Its internal architecture supports precise VOCM control (midrail default on single supply) and maintains symmetrical gain paths via matched Rf/Rg feedback networks.
Unlike standard op-amps, it operates as two coordinated inverting amplifiers with shared biasing - delivering twice the dynamic range of single-ended equivalents while inherently canceling second-harmonic distortion. The PD pin enables active-low shutdown, reducing quiescent current to 0.88 mA and raising output impedance above 1 MΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - supports wideband signal chain front-ends up to UHF sampling rates. |
| Slew Rate | 450 V/µs - enables clean reproduction of fast transient signals without slewing-induced distortion. |
| THD @ 1 MHz | –79 dB (differential in/out, 2 VPP) - meets SNR requirements for 16-bit+ ADC drivers. |
| Input Noise | 6.5 nV/√Hz at 10 kHz - preserves low-level signal integrity in high-gain sensor interfaces. |
| Shutdown Current | 0.88 mA typical - allows power gating in battery-powered or multi-channel systems without PCB redesign. |
| Common-Mode Range | –4 V to +4.5 V (±5 V supply) - accommodates rail-to-rail input signals in industrial sensor front-ends. |
| Output Swing | ±12.9 V (±15 V supply) - delivers full-scale differential drive into 800 Ω loads for high-fidelity data converter coupling. |
Pinout & Package
THS4140IDGNG4 is housed in an 8-pin MSOP PowerPAD™ package (DGN-8), featuring an exposed thermal pad on the underside for enhanced thermal dissipation. The PowerPAD must be soldered to a copper pour connected to VCC− or ground for reliable operation at full performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN−) | Inverting input | Differential input node; requires matched trace length and impedance to VIN+ for CMRR optimization. |
| 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 5 V single supply or ±15 V dual supply; decouple with 6.8 µF + 0.1 µF per rail. |
| 4 (VOUT+) | Positive differential output | Delivers inverted-phase signal; series 20 Ω resistor required for >10 pF capacitive loads. |
| 5 (VIN+) | Non-inverting input | Differential input node; symmetry with VIN− critical for harmonic cancellation and PSRR. |
| 6 (PD) | Power-down enable | Active-low shutdown control; tie to VCC− to enter low-power mode (ICC(SD) = 0.88 mA). |
| 7 (VCC−) | Negative supply | Reference for PD pin threshold (1.4 V above VCC−); also serves as thermal pad connection point. |
| 8 (VOUT−) | Negative differential output | Delivers non-inverted-phase signal; complements VOUT+ to form fully differential output pair. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables inherent common-mode noise rejection at input, output, and supply rails - critical for noisy industrial environments. |
| Single-supply VOCM biasing | VOCM defaults to midrail (VCC/2) when unconnected - simplifies interface to 5 V ADCs without external level-shifting circuitry. |
| High slew rate + low distortion | 450 V/µs slew rate combined with –79 dB THD at 1 MHz ensures fidelity in wideband instrumentation and communications applications. |
| Thermally enhanced PowerPAD™ | DGN-8 package achieves θJA = 58.4°C/W - supports continuous operation at 85°C ambient with proper PCB copper area. |
| Active-low shutdown | PD pin reduces ICC to 0.88 mA and raises output impedance >1 MΩ - enables channel multiplexing and power sequencing in multi-amplifier systems. |
Applications
| ADC Driver for High-Speed Data Acquisition | Differential Antialiasing Filter Interface |
|---|---|
Use Scenario: Driving the differential inputs of a 16-bit, 100 MSPS ADC in a portable spectrum analyzer. IC Role / Device Role / Timing Role: Converts single-ended IF signal to balanced differential output while maintaining phase coherence and minimizing even-order harmonics. Use Value: Enables full utilization of ADC dynamic range (16-bit ENOB) by suppressing second-harmonic distortion through symmetrical output cancellation. | Use Scenario: Integrating into a 5th-order active antialiasing filter preceding a medical-grade 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Provides high-Z differential output to drive filter input while rejecting common-mode interference from adjacent switching regulators. Use Value: Maintains >84 dB CMRR across 100 kHz–10 MHz band, preserving filter stopband attenuation and preventing aliasing artifacts. |
| Single-Supply Sensor Signal Conditioning | High-Fidelity Communications Transceiver |
Use Scenario: Amplifying low-level bridge sensor outputs in a 5 V-powered industrial pressure transmitter. IC Role / Device Role / Timing Role: Performs single-ended-to-differential conversion and level shifting to match ADC input range, with VOCM tied to internal midrail. Use Value: Eliminates need for external reference buffers or dual supplies - reduces BOM count and layout complexity while retaining 110 dB PSRR. | Use Scenario: Transmitting baseband I/Q signals in a software-defined radio front-end operating from ±12 V supplies. IC Role / Device Role / Timing Role: Serves as differential line driver with matched output impedance and ultra-low group delay variation (<10 ps over 20 MHz). Use Value: Delivers <0.01% differential gain/phase error across 0–15 MHz, ensuring EVM compliance for QAM-64 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 |
|---|---|---|---|
| THS4141IDGNG4 | No PD pin; fixed operation only; identical bandwidth, noise, and distortion specs. | Preferred where continuous operation is required and power cycling is unnecessary. | Select THS4141IDGNG4 if shutdown functionality is not needed - eliminates PD routing and simplifies control logic. |
| THS4131IDGNG4 | Lower 150 MHz bandwidth, 51 V/µs slew rate, 1.3 nV/√Hz noise; no PD pin. | Better suited for lower-frequency, ultra-low-noise applications like precision weigh scales or seismic sensors. | Choose THS4131IDGNG4 when sub-100 MHz bandwidth suffices and input noise below 2 nV/√Hz is prioritized over speed. |
Compared with THS4141IDGNG4 and THS4131IDGNG4, THS4140IDGNG4 uniquely combines 160 MHz bandwidth, 450 V/µs slew rate, and active-low shutdown in the same DGN-8 footprint - making it optimal for power-aware, wideband data acquisition systems requiring flexible channel management.
Availability
THS4140IDGNG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, precision sensor signal conditioning, and communications transceiver designs requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for THS4140IDGNG4 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-performance amplifier design and manufacturing.
The THS414x family was engineered specifically for demanding differential signal chain applications - including ADC driving, antialiasing filtering, and high-fidelity communications - where bandwidth, linearity, and power efficiency are simultaneously critical.
FAQ
What is the function of the PD pin on the THS4140IDGNG4?
The PD (Power-Down) pin on the THS4140IDGNG4 is an active-low control terminal that places the amplifier into low-power standby mode when pulled below 1.4 V above VCC−. In shutdown, quiescent current drops to 0.88 mA and output impedance exceeds 1 MΩ, enabling selective channel disabling without affecting adjacent circuitry. This feature is exclusive to the THS4140IDGNG4 within its family and is not present on the THS4141IDGNG4.
How does the THS4140IDGNG4 handle single-supply operation?
The THS4140IDGNG4 supports single-supply operation with VCC ranging from 5 V to 30 V. When no external voltage is applied to the VOCM pin, it defaults to midrail (VCC/2), establishing the common-mode output level automatically. This allows direct interfacing to 5 V differential ADCs without external level-shifting components - a capability confirmed in TI's SLOS320F datasheet Figure 23 and validated in THS4140IDGNG4 evaluation board schematics.
What thermal considerations apply to the THS4140IDGNG4 in DGN-8 package?
The THS4140IDGNG4 in DGN-8 uses TI's PowerPAD™ construction, with an exposed thermal pad on the underside requiring solder connection to a PCB copper pour. Thermal resistance is θJA = 58.4°C/W when properly implemented. To maintain junction temperature ≤125°C at 85°C ambient, the thermal pad must connect to ≥2 cm² of 2-oz copper with ≥4 thermal vias - as specified in TI technical brief SLMA002 and confirmed in the THS4140IDGNG4 dissipation rating table.
Can the THS4140IDGNG4 drive capacitive loads directly?
No - the THS4140IDGNG4 must not drive capacitive loads >10 pF directly due to reduced phase margin causing instability. TI's datasheet mandates a minimum 20 Ω series resistor between each output (VOUT+, VOUT−) and the load. For 50 Ω transmission lines, a 50 Ω series resistor provides both isolation and impedance matching. This requirement is explicitly stated in Figure 25 and the "Driving a Capacitive Load" section of the THS4140IDGNG4 datasheet.
What is the recommended resistor tolerance for feedback networks used with THS4140IDGNG4?
Texas Instruments specifies 1% or better resistor tolerance for Rf and Rg in THS4140IDGNG4 circuits. Mismatch degrades CMRR, PSRR, and second-harmonic cancellation - all critical to the device's differential performance. The datasheet's "Resistor Matching" section (page 11) confirms that 1% tolerance preserves >84 dB CMRR and prevents distortion increase beyond –79 dB THD. Precision thin-film or bulk metal foil resistors are recommended for production designs.
THS4140IDGNG4 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:
- Discontinued at Digi-Key
- 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
THS4140IDGNG4 FAQ
1.How can I place an order for THS4140IDGNG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4140IDGNG4 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 THS4140IDGNG4 reliable?
The price and inventory of THS4140IDGNG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4140IDGNG4 is usually 5 days.
3.What payment methods are accepted for THS4140IDGNG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4140IDGNG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4140IDGNG4?
THS4140IDGNG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4140IDGNG4 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 THS4140IDGNG4?
For technical support, including THS4140IDGNG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4140IDGNG4 requirements.
6.How does Aetrix verify that THS4140IDGNG4 is sourced from the original manufacturer or authorized distributors?
All THS4140IDGNG4 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 THS4140IDGNG4 meets industry standards.
7.What is the process for return or replacement of THS4140IDGNG4?
All THS4140IDGNG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS4140IDGNG4, 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 THS4140IDGNG4 part is unused and in its original packaging.
Return procedure for THS4140IDGNG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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