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Texas Instruments THS4140IDGKR
- Part No.:
- THS4140IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4140IDGKR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,311
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Product details
Overview
THS4140IDGKR from Texas Instruments is a high-speed fully differential amplifier optimized 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, 6.5 nV/√Hz input-referred voltage noise, and features an active shutdown pin (PD) drawing only 0.88 mA quiescent current in power-down mode. It is widely deployed in high-resolution data acquisition systems interfacing with differential-input ADCs.
For engineers reviewing the THS4140IDGKR datasheet, THS4140IDGKR pinout, THS4140IDGKR application, or THS4140IDGKR equivalent, key selection criteria include differential output swing (±12.9 V at ±15 V), VOCM-controlled common-mode level setting, PowerPAD™ thermal management requirements, and precise resistor matching for CMRR preservation in antialiasing filter designs.
Technical Context
The THS4140IDGKR implements a true fully differential signal path-differential input to differential output-using TI's BiComI complementary bipolar process. Its architecture enables balanced output rejection of common-mode noise and intrinsic cancellation of second-harmonic distortion due to symmetrical output polarity.
It supports wide supply flexibility (5 V single supply to ±15 V dual supply) and integrates a dedicated PD (power-down) terminal that actively disables internal bias circuitry, reducing ICC to 0.88 mA while raising output impedance above 1 MΩ. The VOCM pin sets the DC common-mode level of both outputs independently of gain configuration and must be bypassed with a 0.1 µF capacitor for stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 160 MHz at ±15 V supply - enables baseband signal conditioning up to Nyquist frequencies of 14-bit+ ADCs sampling at ≥100 MSPS. |
| Slew Rate | 450 V/µs - supports clean amplification of fast transient signals without slewing-induced distortion in pulse applications. |
| THD @ 1 MHz | –79 dB differential-in/differential-out - ensures minimal harmonic corruption when driving high-SFDR ADCs like ADS54J60. |
| Input Voltage Noise | 6.5 nV/√Hz at 10 kHz - preserves SNR integrity in low-level sensor signal chains prior to digitization. |
| Shutdown Current | 0.88 mA - allows system-level power gating 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 while maintaining linearity and PSRR. |
| Output Swing | ±12.9 V at ±15 V supply - provides full-scale differential headroom for 16-bit ADCs requiring >24 VPP input range. |
Pinout & Package
The THS4140IDGKR is housed in an 8-pin MSOP PowerPAD™ package (DGK), featuring an exposed thermal pad on the underside for direct PCB copper connection to enhance thermal dissipation. This package requires soldering the thermal pad to a thermally conductive plane per TI SLMA002/SLMA004 guidelines to maintain junction temperature ≤125°C under continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; matched impedance critical for CMRR and harmonic cancellation. |
| VOCM | Common-mode output control | DC level setter for both VOUT+ and VOUT−; bypass with 0.1 µF capacitor to suppress noise coupling. |
| VCC+ | Positive supply | Accepts +2.5 V to +15 V in dual-supply or +5 V to +30 V in single-supply configurations. |
| VOUT+ | Positive differential output | Delivers inverted-phase signal relative to VOUT−; balanced pair rejects common-mode interference. |
| VIN+ | Non-inverting input | Differential input node; symmetry with VIN− essential for input stage matching and offset cancellation. |
| PD | Power-down control | Active-low enable; pulled to VCC− to enter shutdown mode (ICC(SD) = 0.88 mA); internal 50 kΩ pull-up to VCC. |
| VCC− | Negative supply | Accepts –2.5 V to –15 V in dual-supply or ground in single-supply operation. |
| VOUT− | Negative differential output | Delivers non-inverted-phase signal relative to VOUT+; forms true differential pair with VOUT+. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables intrinsic second-harmonic cancellation and >84 dB CMRR across audio-to-RF bands, improving ADC effective resolution. |
| PowerPAD™ thermal package (DGK) | Reduces θJA to 260°C/W and supports 385 mW continuous power dissipation at 85°C ambient-critical for compact high-density layouts. |
| Programmable VOCM interface | Allows dynamic adjustment of output common-mode level to match ADC reference voltage (e.g., AVDD/2), eliminating level-shifting components. |
| Active shutdown with high-Z outputs | Drives output impedance >1 MΩ in shutdown, preventing loading of downstream stages and enabling multiplexed analog front-ends. |
| Wide supply range (5 V to ±15 V) | Supports legacy industrial ±15 V rails and modern low-voltage 5 V systems without redesign-reducing BOM variants. |
Applications
| High-Speed Data Acquisition | Differential ADC Driver |
|---|---|
Use Scenario: Digitizing wideband sensor outputs (e.g., ultrasound transducers, radar IF signals) at ≥100 MSPS using 14–16-bit differential-input ADCs. IC Role / Device Role / Timing Role: Single-ended-to-differential converter and gain stage preceding the ADC, providing matched drive to both AIN+ and AIN− pins. Use Value: Delivers 160 MHz bandwidth and –79 dB THD to preserve ENOB >12.5 bits at 10 MSPS, avoiding external transformers or discrete baluns. | Use Scenario: Driving the differential inputs of precision SAR or pipeline ADCs (e.g., ADS8860, ADS54J60) in test equipment and medical imaging. IC Role / Device Role / Timing Role: Precision gain block with VOCM alignment to ADC reference, ensuring optimal common-mode headroom and minimizing code-dependent errors. Use Value: 6.5 nV/√Hz input noise and ±12.9 V output swing enable full utilization of 16-bit ADC dynamic range without clipping or SNR degradation. |
| Antialiasing Filter Interface | Single-Supply Signal Conditioning |
Use Scenario: Integrating into active antialiasing filters between signal source and ADC, where phase-matched low-pass response is required. IC Role / Device Role / Timing Role: Active filter stage implementing 2nd-order Butterworth topology with THS4140IDGKR as gain element and feedback network. Use Value: High slew rate (450 V/µs) and wide bandwidth prevent group delay distortion in filter passband, maintaining time-domain fidelity of sampled waveforms. | Use Scenario: Amplifying unipolar sensor outputs (e.g., pressure transducers, RTDs) in battery-powered portable instruments using 5 V single supply. IC Role / Device Role / Timing Role: Rail-to-rail capable differential driver with VOCM set to 2.5 V, enabling full-scale differential swing from 0–5 V input. Use Value: Operates down to 5 V supply with 45 mA output drive capability, eliminating need for dual supplies while retaining >100 dB PSRR at DC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4141IDGKR | No PD pin; higher quiescent current (16 mA vs. 13.2 mA typical); identical bandwidth, noise, and distortion specs. | Used where continuous operation is mandatory and power gating is unnecessary-e.g., always-on instrumentation front-ends. | Select THS4141IDGKR if shutdown functionality is not required and board space permits same footprint. |
| THS4131IDGKR | Lower bandwidth (150 MHz), higher slew rate (51 V/µs), lower input noise (1.3 nV/√Hz), no PD pin. | Better suited for ultra-low-noise, moderate-bandwidth applications (e.g., precision weigh scales, seismic sensors) where power-down is secondary. | Choose THS4131IDGKR when sub-2 nV/√Hz noise dominates over shutdown capability and 10 MHz extra bandwidth is expendable. |
Compared with THS4141IDGKR and THS4131IDGKR, the THS4140IDGKR uniquely combines active power-down, 160 MHz bandwidth, and 6.5 nV/√Hz noise-making it optimal for portable, high-sample-rate data loggers requiring dynamic power management without sacrificing fidelity.
Availability
THS4140IDGKR is available at Aetrix Electronics and suitable for high-speed data acquisition, differential ADC driving, and antialiasing filter interface applications requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for THS4140IDGKR 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 op-amps and data converter interface solutions.
The THS414x product line was designed specifically for high-fidelity, high-bandwidth differential signal conditioning in precision data acquisition systems-emphasizing low distortion, wide supply flexibility, and robust thermal performance in compact packages.
FAQ
What is the function of the PD pin on the THS4140IDGKR?
The PD (power-down) pin on the THS4140IDGKR is an active-low control terminal 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 output impedance exceeds 1 MΩ. Leaving PD unconnected defaults the device to active operation via an internal 50 kΩ pull-up to VCC. Proper use of PD enables dynamic power management in battery-operated THS4140IDGKR-based systems.
How does the VOCM pin affect THS4140IDGKR performance in ADC driver applications?
The VOCM pin on the THS4140IDGKR sets the DC common-mode voltage of both differential outputs (VOUT+ and VOUT−). When interfacing with differential-input ADCs, VOCM must be aligned to the ADC's reference voltage (e.g., AVDD/2) to maximize input headroom and minimize code-dependent offset errors. TI recommends bypassing VOCM with a 0.1 µF capacitor to suppress noise coupling-failure to do so degrades THD and SFDR. In the THS4140IDGKR, VOCM operates up to the amplifier's full bandwidth, supporting dynamic level shifting.
What thermal design considerations apply to the THS4140IDGKR's DGK package?
The THS4140IDGKR uses an 8-pin MSOP PowerPAD™ (DGK) package with an exposed thermal pad on the underside. To maintain junction temperature ≤125°C under continuous load, the thermal pad must be soldered to a dedicated PCB copper pour connected via multiple thermal vias to an internal ground or power plane. Per TI SLMA002, insufficient thermal relief causes rapid distortion rise and reliability risk. The DGK package achieves θJA = 260°C/W only with proper thermal pad implementation-board layout directly determines maximum sustainable output current and bandwidth stability.
Can the THS4140IDGKR operate from a single 5-V supply, and what are the output swing limitations?
Yes, the THS4140IDGKR supports single 5-V supply operation (VCC+ = 5 V, VCC− = GND). In this configuration, the output swing is specified as 1.2 V to 3.8 V (typical) for each output-yielding a differential swing of up to 2.6 VPP. VOCM defaults to midrail (2.5 V), enabling direct interface with 2.5 V-referenced differential ADCs. Output current remains rated at 45 mA (RL = 7 Ω), but slew rate reduces slightly versus ±15 V operation. Full specifications for 5-V use are validated across –40°C to +85°C for the THS4140IDGKR variant.
Why is resistor matching critical when using the THS4140IDGKR in closed-loop configurations?
Resistor matching is critical for the THS4140IDGKR because mismatched feedback (Rf) or gain-setting (Rg) resistors directly degrade CMRR, PSRR, and second-harmonic cancellation-core advantages of its fully differential architecture. A 1% mismatch can reduce CMRR by >20 dB at 1 MHz and increase even-order distortion by 10–15 dB. TI specifies performance assuming matched ratios; therefore, 0.1% thin-film or 1% metal-film resistor pairs are recommended. Mismatch also shifts VOCM tracking and introduces gain error-both verified in THS4140IDGKR electrical characterization across temperature.
THS4140IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
THS4140IDGKR FAQ
1.How can I place an order for THS4140IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4140IDGKR 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 THS4140IDGKR reliable?
The price and inventory of THS4140IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4140IDGKR is usually 5 days.
3.What payment methods are accepted for THS4140IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4140IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4140IDGKR?
THS4140IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4140IDGKR 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 THS4140IDGKR?
For technical support, including THS4140IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4140IDGKR requirements.
6.How does Aetrix verify that THS4140IDGKR is sourced from the original manufacturer or authorized distributors?
All THS4140IDGKR 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 THS4140IDGKR meets industry standards.
7.What is the process for return or replacement of THS4140IDGKR?
All THS4140IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with THS4140IDGKR, 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 THS4140IDGKR part is unused and in its original packaging.
Return procedure for THS4140IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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