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Texas Instruments THS4140ID
- Part No.:
- THS4140ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4140ID.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
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Product details
Overview
THS4140ID from Texas Instruments is a high-speed fully differential amplifier designed for precision 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 features an active shutdown pin (PD) enabling 880 µA quiescent current in low-power mode - used as a differential ADC driver in high-resolution instrumentation.
For engineers reviewing the THS4140ID datasheet, THS4140ID pinout, THS4140ID application, or THS4140ID equivalent, key selection criteria include differential output swing (±12 V @ ±15 V), VOCM-controlled common-mode level shifting, shutdown functionality, and PowerPAD™ MSOP-8 thermal performance under high-frequency load conditions.
Technical Context
The THS4140ID 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 symmetrical architecture inherently cancels second-harmonic distortion and improves PSRR beyond single-ended op-amps.
It supports flexible biasing via the VOCM pin, which sets the output common-mode voltage - internally defaulting to midrail in single-supply operation (e.g., 2.5 V @ 5 V). The PD pin provides active-low shutdown control, placing outputs in high-impedance state with >1 MΩ output impedance while reducing ICC to 0.88 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - enables baseband signal fidelity up to Nyquist frequency of 80 MSPS ADCs |
| Slew Rate | 450 V/µs - supports fast settling of large-signal transients without slewing-induced distortion |
| THD @ 1 MHz | –79 dB differential-in/differential-out - meets SFDR requirements for 14-bit+ ADC front-ends |
| Input Noise | 6.5 nV/√Hz at 10 kHz - preserves SNR in low-level sensor signal amplification |
| Shutdown Current | 0.88 mA typical - reduces system power by >94% vs. 16 mA active ICC, critical for battery-operated DAQ |
| Common-Mode Range | –4 V to +4.5 V @ ±5 V supply - accommodates wide input signal excursions before clipping |
| Output Swing | ±12 V @ ±15 V supply into 800 Ω - delivers full-scale differential drive for 24-bit SAR or sigma-delta ADCs |
Pinout & Package
The THS4140ID is packaged in an 8-pin MSOP PowerPAD™ (DGN) thermally enhanced package, with the exposed thermal pad electrically connected to VCC– and requiring solder connection to PCB ground or thermal plane for optimal junction temperature control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN− | Inverting input | Differential input node; matched impedance critical 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 or ±15 V dual supply; decoupling required within 2.54 mm |
| 4: VOUT+ | Positive differential output | Delivers inverted gain-stage output; requires series resistor ≥20 Ω 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 | Pulled to VCC– to disable amplifier; internal 50 kΩ pull-up to VCC keeps device active if floating |
| 7: VCC− | Negative supply / thermal pad reference | Connected to exposed PowerPAD™; must be soldered to thermal plane for <125°C junction temp |
| 8: VOUT− | Negative differential output | Delivers non-inverted gain-stage output; complements VOUT+ for balanced signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables true differential signaling end-to-end, rejecting coupled noise on inputs, supplies, and outputs |
| Programmable output common-mode level | VOCM pin allows precise DC offset setting independent of gain, essential for ADC reference alignment |
| Integrated shutdown control | PD pin reduces ICC to 0.88 mA while placing outputs in high-Z state - eliminates need for external enable logic |
| PowerPAD™ thermal enhancement | MSOP-8 DGN package achieves θJC = 4.7°C/W, enabling 1.71 W power dissipation at TA = 25°C |
| Wide supply range | Operates from 5 V single supply to ±15 V dual supply - supports legacy industrial and modern low-voltage systems |
Applications
| High-Speed Data Acquisition | Differential Sensor Interface |
|---|---|
Use Scenario: Driving the differential input of a 16-bit, 1 MSPS SAR ADC in automated test equipment. IC Role / Device Role / Timing Role: Differential ADC driver providing gain, level-shifting, and antialias filtering interface between analog front-end and converter. Use Value: 160 MHz bandwidth and –79 dB THD ensure full dynamic range utilization without harmonic folding into Nyquist band. | Use Scenario: Conditioning low-amplitude bridge sensor outputs (e.g., strain gauge) in precision weigh scales. IC Role / Device Role / Timing Role: Single-ended to differential converter with VOCM-adjusted common-mode output matching ADC reference. Use Value: 6.5 nV/√Hz input noise and 84 dB CMRR preserve microvolt-level signal integrity amid noisy industrial environments. |
| Communications Baseband Processing | Medical Imaging Signal Chain |
Use Scenario: Transmitting baseband I/Q signals from FPGA DAC outputs to RF mixer inputs in software-defined radio. IC Role / Device Role / Timing Role: Differential transmitter buffer with matched output impedance and shutdown for channel gating. Use Value: 450 V/µs slew rate and balanced outputs minimize even-order distortion critical for EVM compliance. | Use Scenario: Front-end amplification for ultrasound receive beamforming ASICs requiring low-noise, high-linearity analog paths. IC Role / Device Role / Timing Role: Low-distortion differential driver feeding multiplexed ADC arrays in portable imaging devices. Use Value: Shutdown mode (ICC(SD) = 0.88 mA) extends battery life during idle periods without sacrificing startup latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4141ID | No PD pin; fixed operation only; identical bandwidth, noise, and distortion specs | Used where continuous operation is mandatory and power cycling is not required | Select THS4141ID when shutdown functionality is unnecessary and board space allows same footprint |
| THS4131IDGN | 150 MHz bandwidth, 51 V/µs slew rate, 1.3 nV/√Hz noise - lower speed but ultra-low noise | Preferred for sub-MHz precision measurement where SNR dominates over speed | Choose THS4131IDGN when optimizing for <2 nV/√Hz noise at the expense of 10 MHz bandwidth margin |
Compared with THS4141ID, THS4140ID adds shutdown control at minor cost in layout complexity; versus THS4131IDGN, it trades 1.3 nV/√Hz noise for 10× higher slew rate and 10 MHz extra bandwidth - making THS4140ID optimal for mixed-signal systems demanding both speed and moderate noise floor.
Availability
THS4140ID is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging signal chains, and communications baseband processing requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for THS4140ID 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 THS4140ID belongs to TI's High-Speed Fully Differential I/O Amplifier product line, engineered specifically for precision differential signal conditioning in data converter interfaces and high-fidelity analog front-ends.
FAQ
What is the function of the PD pin on the THS4140ID?
The PD (Power-Down) pin on the THS4140ID is an active-low control that places the amplifier in low-power shutdown mode when pulled below 1.4 V above VCC–. In this state, quiescent current drops to 0.88 mA and outputs enter high-impedance (>1 MΩ), preserving signal integrity in multi-channel systems. THS4140ID requires no external pull-up since an internal 50 kΩ resistor connects PD to VCC.
How does the VOCM pin affect THS4140ID performance in single-supply operation?
In single-supply operation (e.g., 5 V), the VOCM pin on the THS4140ID sets the common-mode voltage of both differential outputs - defaulting to midrail (2.5 V) if left unconnected. Applying a clean reference (e.g., ADC VREF via 0.1 µF bypass) ensures optimal common-mode alignment, minimizing offset errors and maximizing dynamic range when interfacing with differential ADCs. THS4140ID maintains full AC performance across VOCM voltages from –3.77 V to +4.3 V.
Can THS4140ID drive capacitive loads directly, and what precautions apply?
The THS4140ID is not recommended for direct capacitive loading >10 pF due to potential phase-margin degradation and high-frequency ringing. To maintain stability, a series resistor (≥20 Ω) must be placed between each output (VOUT+, VOUT−) and the load - especially critical in 50 Ω transmission lines where 50 Ω series termination also provides impedance matching. THS4140ID's internal compensation prioritizes bandwidth and slew rate, making external isolation essential for robust capacitive drive.
What thermal management is required for THS4140ID in the DGN package?
The THS4140ID in the MSOP PowerPAD™ (DGN) package requires soldering of its exposed thermal pad to a dedicated PCB copper pour connected to ground or a thermal plane. With θJC = 4.7°C/W, failure to thermally connect the pad risks exceeding the 125°C maximum junction temperature under 1.71 W dissipation. THS4140ID's PowerPAD™ design mandates thermal vias under the pad and ≥1 in² copper area for reliable operation at full rated power across –40°C to +85°C.
How does THS4140ID differ from THS4141ID in pin configuration and system impact?
The THS4140ID includes a dedicated PD pin (Pin 6) for shutdown control, whereas THS4141ID replaces it with NC (no connect). This makes THS4140ID suitable for power-gated systems like portable DAQ or battery-powered medical devices, reducing idle current by >94%. Both share identical electrical specs, package, and pinout except Pin 6 - so THS4140ID can replace THS4141ID in existing layouts only if PD is tied to VCC– or controlled externally.
THS4140ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
THS4140ID FAQ
1.How can I place an order for THS4140ID through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4140ID 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 THS4140ID reliable?
The price and inventory of THS4140ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4140ID is usually 5 days.
3.What payment methods are accepted for THS4140ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4140ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4140ID?
THS4140ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4140ID 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 THS4140ID?
For technical support, including THS4140ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4140ID requirements.
6.How does Aetrix verify that THS4140ID is sourced from the original manufacturer or authorized distributors?
All THS4140ID 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 THS4140ID meets industry standards.
7.What is the process for return or replacement of THS4140ID?
All THS4140ID units undergo pre-shipment inspection (PSI). If there is an issue with THS4140ID, 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 THS4140ID part is unused and in its original packaging.
Return procedure for THS4140ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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