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Texas Instruments THS4151CDGKR
- Part No.:
- THS4151CDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4151CDGKR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,815
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Product details
Overview
THS4151CDGKR from Texas Instruments is a high-speed fully differential amplifier optimized for ADC driving, antialias filtering, and differential signal conditioning in precision data acquisition systems. It delivers 150 MHz –3 dB bandwidth (±5 V supply), 650 V/µs slew rate (±15 V), –83 dB total harmonic distortion at 1 MHz, 7.6 nV/√Hz input-referred voltage noise, and operates from ±2.5 V to ±15 V dual supply or 5 V single supply.
For engineers reviewing the THS4151CDGKR datasheet, THS4151CDGKR pinout, THS4151CDGKR application, or THS4151CDGKR equivalent, key selection criteria include differential output swing (±3.6 V min at ±5 V), VOCM-controlled common-mode level setting, resistor-matched gain configuration (Rf = 390 Ω, Rg = 390 Ω for G = 1), and MSOP-8 PowerPAD™ thermal performance with θJA = 260°C/W.
Technical Context
The THS4151CDGKR 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 and suppression of even-order harmonics. Its internal architecture supports both differential-input/differential-output and single-ended-input/differential-output configurations without external phase inversion.
It features a dedicated VOCM pin that sets the output common-mode voltage independently of input signals-critical for interfacing with differential ADCs requiring precise mid-rail or reference-derived biasing. The device lacks shutdown functionality (unlike THS4150), confirmed by absence of PD pin and omission of ICC(SD) specification in its electrical characteristics table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 150 MHz at ±5 V supply - enables baseband signal fidelity up to UHF frequencies in high-resolution ADC front-ends. |
| Slew Rate | 650 V/µs at ±15 V - supports fast transient response for wide dynamic range inputs without slewing-induced distortion. |
| Total Harmonic Distortion | –83 dB at 1 MHz, VO = 2 VPP - ensures minimal spectral contamination in 12–16-bit data converter applications. |
| Input Voltage Noise | 7.6 nV/√Hz above 10 kHz - preserves SNR integrity when amplifying low-level sensor or transducer outputs. |
| Output Swing | ±3.6 V min into 800 Ω load at ±5 V - delivers full-scale differential drive capability compatible with 12-bit+ ADC inputs. |
| Supply Range | ±2.5 V to ±15 V dual or 5 V single - allows flexible integration across industrial, medical, and test equipment power domains. |
| Common-Mode Input Range | VS– +1.5 V to VS+ –1.5 V - accommodates rail-to-rail input signal centering while maintaining linearity. |
Pinout & Package
THS4151CDGKR is housed in an 8-pin MSOP PowerPAD™ package (DGK), featuring an exposed thermal pad on the underside requiring connection to a PCB copper pour for thermal management. The PowerPAD enhances power dissipation capability but mandates proper solder stencil design and thermal via placement per TI SLMA002/SLMA004 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; paired with VIN+ to define VID = VIN+ − VIN−; requires matched trace routing and impedance control. |
| VOCM | Output common-mode control | Sets average DC level of VOUT+ and VOUT−; bypass with 0.1 µF capacitor to suppress noise coupling into output stage. |
| VCC+ | Positive supply | Accepts +2.5 V to +15 V in dual supply or +5 V in single supply; must be decoupled locally with 0.1 µF ceramic capacitor. |
| VOUT+ | Positive differential output | Delivers amplified signal referenced to VOCM; requires series resistor (≥20 Ω) when driving >10 pF capacitive loads to prevent oscillation. |
| VIN+ | Non-inverting input | Differential input node; symmetric layout with VIN− essential for CMRR >75 dB and second-harmonic cancellation. |
| NC | No connect | Pin 6 is internally unconnected; must remain floating-no external connection or pull-up/down allowed. |
| VCC− | Negative supply | Accepts –2.5 V to –15 V in dual supply; tied to ground in single-supply mode; requires local 0.1 µF decoupling. |
| VOUT− | Negative differential output | Complementary output to VOUT+; maintains precise amplitude and phase symmetry for optimal common-mode rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables balanced noise rejection and 6 dB higher dynamic range vs. single-ended amplifiers-critical for 16-bit+ ADC drivers. |
| VOCM-controlled output bias | Allows direct interface to ADC reference voltages (e.g., VREF/2) without level-shifting circuitry, reducing component count and board area. |
| Resistor-matched gain configuration | Supports precise gain accuracy (G = Rf/Rg) with 1% tolerance resistors; mismatch >0.1% degrades CMRR and harmonic performance. |
| High slew rate + wide bandwidth | 650 V/µs slew rate and 150 MHz bandwidth jointly support fast settling (<247 ns to 0.01%) for multiplexed or burst-mode sampling. |
| Low input voltage noise | 7.6 nV/√Hz input-referred noise preserves signal integrity in low-amplitude sensor interfaces (e.g., strain gauges, piezoelectrics). |
Applications
| High-Speed Data Acquisition | Differential Antialias Filtering |
|---|---|
|
Use Scenario: Driving the analog inputs of a 16-bit, 1 MSPS differential SAR ADC in automated test equipment. IC Role / Device Role / Timing Role: Fully differential amplifier configured as single-ended-to-differential converter with VOCM tied to ADC's internal reference midpoint. Use Value: Eliminates need for external transformers or discrete op-amp pairs, reduces THD by >10 dB versus single-ended solutions, and improves SNR by 3 dB through common-mode noise rejection. |
Use Scenario: Active low-pass filter stage preceding a 12-bit pipeline ADC in medical imaging front-end. IC Role / Device Role / Timing Role: Differential amplifier embedded in a 2nd-order MFB topology with Rf/Rg network defining cutoff frequency and Q-factor. Use Value: Provides monotonic group delay and <−65 dB alias rejection at Nyquist frequency while maintaining differential signaling integrity to ADC inputs. |
| Industrial Sensor Signal Conditioning | Communications Baseband Processing |
|
Use Scenario: Amplifying low-level bridge sensor outputs (e.g., pressure transducers) in harsh EMI environments. IC Role / Device Role / Timing Role: Differential-input/differential-output amplifier rejecting common-mode interference induced on long sensor cables. Use Value: Achieves >75 dB CMRR over 100 kHz bandwidth, suppressing 50/60 Hz mains noise and RF pickup without additional shielding or chokes. |
Use Scenario: Level-shifting and balancing I/Q baseband signals in software-defined radio receiver chains. IC Role / Device Role / Timing Role: Output level shifter with VOCM set to match DAC output common-mode voltage, ensuring seamless analog interface. Use Value: Maintains precise amplitude/phase matching between I and Q paths, minimizing image rejection degradation below –60 dBc. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131CDGKR | 150 MHz BW, 51 V/µs SR, 1.3 nV/√Hz noise, no VOCM pin - uses fixed internal common-mode bias. | Lacks VOCM flexibility; unsuitable for ADCs requiring external reference alignment or variable common-mode setup. | Select when lowest noise dominates and VOCM control is unnecessary; verify ADC input common-mode compatibility. |
| THS4561IRGET | 1.8 GHz GBW, 4000 V/µs SR, 1.6 nV/√Hz, integrated VOCM buffer, 16-pin QFN - higher performance, larger footprint. | Supports >100 MSPS ADCs and RF sampling; requires more complex layout and tighter layout constraints than MSOP-8. | Choose for >100 MSPS systems where THS4151CDGKR's 150 MHz BW is limiting; accept higher cost and thermal design effort. |
Compared with THS4151CDGKR, THS4131CDGKR trades VOCM configurability for lower noise and simpler biasing, while THS4561IRGET extends bandwidth and slew rate at the cost of increased complexity and power-making THS4151CDGKR the optimal balance for 1–10 MSPS precision data acquisition.
Availability
THS4151CDGKR is available at Aetrix Electronics and suitable for high-speed data acquisition, differential antialias filtering, and industrial sensor signal conditioning requiring stable component supply and long-term production continuity.
Supply support for THS4151CDGKR 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 high-performance signal chain solutions with over 50 years of innovation in precision amplifiers and data converters.
The THS415x family was designed specifically for high-fidelity differential signal conditioning in precision ADC driver, antialias filter, and communications baseband applications-emphasizing low distortion, wide bandwidth, and robust common-mode control.
FAQ
What is the function of the NC pin on the THS4151CDGKR?
The NC (No Connect) pin on the THS4151CDGKR is Pin 6, which is internally unconnected and must remain electrically floating. It is not intended for grounding, pulling, or any external connection. Improper handling of this pin may disrupt internal biasing or cause unpredictable behavior. Always follow TI's recommended layout practices for the DGK package, including isolation of Pin 6 from adjacent traces and planes.
Does the THS4151CDGKR support shutdown mode?
No, the THS4151CDGKR does not support shutdown mode. Unlike the THS4150 variant-which includes a PD (Power Down) pin and specifies ICC(SD) = 1 mA-the THS4151CDGKR omits this functionality entirely. Its datasheet contains no shutdown-related specifications, timing diagrams, or pin definitions for power-down control. System-level power management must therefore be implemented externally, such as via supply sequencing or enable circuitry.
How should the VOCM pin be used in single-supply operation of the THS4151CDGKR?
In single-supply operation (e.g., VCC+ = 5 V, VCC− = GND), the VOCM pin of the THS4151CDGKR should be driven to 2.5 V-typically sourced from the ADC's internal reference (e.g., VREF/2) or a precision voltage divider. A 0.1 µF ceramic capacitor must be placed directly at the VOCM pin to ground to suppress noise coupling. Leaving VOCM open results in undefined output common-mode voltage and potential saturation or distortion.
What is the maximum capacitive load the THS4151CDGKR can drive without instability?
The THS4151CDGKR is internally compensated for optimal bandwidth and slew rate, making it sensitive to capacitive loading. Driving >10 pF directly at the output risks reduced phase margin, ringing, or oscillation. For loads exceeding 10 pF-including PCB trace capacitance and ADC input capacitance-a minimum 20 Ω series resistor must be placed at each output (VOUT+ and VOUT−). This isolates the amplifier from the load and restores stability while preserving signal integrity in 50 Ω transmission environments.
Can the THS4151CDGKR be used with a 3.3 V single supply?
Yes, the THS4151CDGKR supports 3.3 V single supply operation (VCC+ = 3.3 V, VCC− = GND), though performance is derated versus 5 V or ±5 V conditions. At 3.3 V, the output swing reduces to approximately ±1.2 V (2.4 VPP differential), and small-signal bandwidth drops to ~100 MHz. Ensure the VOCM voltage is set to 1.65 V and verify that the input common-mode range (VCC− +1.5 V to VCC+ –1.5 V) remains satisfied-i.e., 1.5 V to 1.8 V-for linear operation.
THS4151CDGKR 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:
- 650V/µs
- Gain Bandwidth Product:
- 340 MHz
- -3db Bandwidth:
- 150 MHz
- Current - Input Bias:
- 4.3 µA
- Voltage - Input Offset:
- 1.1 mV
- Current - Supply:
- 17.5mA
- 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-VSSOP
THS4151CDGKR FAQ
1.How can I place an order for THS4151CDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4151CDGKR 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 THS4151CDGKR reliable?
The price and inventory of THS4151CDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4151CDGKR is usually 5 days.
3.What payment methods are accepted for THS4151CDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4151CDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4151CDGKR?
THS4151CDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4151CDGKR 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 THS4151CDGKR?
For technical support, including THS4151CDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4151CDGKR requirements.
6.How does Aetrix verify that THS4151CDGKR is sourced from the original manufacturer or authorized distributors?
All THS4151CDGKR 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 THS4151CDGKR meets industry standards.
7.What is the process for return or replacement of THS4151CDGKR?
All THS4151CDGKR units undergo pre-shipment inspection (PSI). If there is an issue with THS4151CDGKR, 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 THS4151CDGKR part is unused and in its original packaging.
Return procedure for THS4151CDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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