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Texas Instruments THS4151IDGK
- Part No.:
- THS4151IDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4151IDGK.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,065
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Product details
Overview
THS4151IDGK from Texas Instruments is a high-speed fully differential amplifier optimized for ADC driver, antialiasing, 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 THD 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 THS4151IDGK datasheet, THS4151IDGK pinout, THS4151IDGK application, or THS4151IDGK equivalent, this device is selected for high-fidelity differential I/O where common-mode noise rejection, low harmonic distortion, wide supply flexibility, and stable drive into capacitive loads are critical - especially in 12–16-bit SAR and sigma-delta ADC front-ends.
Technical Context
The THS4151IDGK implements a true fully differential signal path from input to output using TI's BiComI complementary bipolar process, enabling balanced output symmetry and inherent second-harmonic cancellation. Its VOCM pin sets output common-mode level independently, supporting both single-supply mid-rail biasing and external reference alignment with ADC VREF.
Internally compensated for maximum bandwidth and slew rate, the device requires series output isolation (≥20 Ω) when driving >10 pF capacitive loads to maintain phase margin and prevent ringing. Resistor matching (1% or better) on feedback and gain-setting networks is mandatory to preserve CMRR, PSRR, and distortion performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 150 MHz at ±5 V supply - supports >75 MSPS sampling without gain peaking in ADC driver configurations. |
| Slew Rate | 650 V/µs at ±15 V - enables clean 2 VPP differential step response with 53 ns settling to 0.1%. |
| Total Harmonic Distortion | –83 dB at 1 MHz, 2 VPP output - ensures <0.012% distortion in 16-bit ADC applications up to Nyquist. |
| Input Voltage Noise | 7.6 nV/√Hz above 10 kHz - contributes ≤0.5 LSB noise floor in 16-bit, 100 kSPS systems with 100 Ω source impedance. |
| Common-Mode Input Range | VS– +1.5 V to VS+ –1.5 V - allows direct interface to rail-to-rail sensors or DAC outputs without level-shifting. |
| Supply Voltage Range | ±2.5 V to ±15 V dual or 5 V single - supports legacy ±15 V industrial systems and modern low-voltage portable designs. |
| Output Voltage Swing | ±3.6 V (min) at ±5 V supply - delivers 7.2 VPP differential swing into 800 Ω load, sufficient for full-scale ADC input ranges. |
Pinout & Package
THS4151IDGK is housed in an 8-pin MSOP PowerPAD™ package (DGK) with exposed thermal pad. The PowerPAD must be soldered to a PCB copper pour for thermal reliability; junction temperature must remain ≤125°C for long-term performance stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; matched impedance required with VIN+ for optimal CMRR and distortion. |
| VOCM | Output common-mode control | Sets DC offset of both outputs; 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 in single supply; decoupling required near pin. |
| VOUT+ | Positive differential output | Provides inverted or non-inverted output depending on configuration; requires ≥20 Ω series resistor for >10 pF loads. |
| VIN+ | Non-inverting input | Differential input node; symmetric layout and trace length critical to maintain balance. |
| NC | No connect | Internally unused; must remain unconnected and unstubbed to avoid parasitic coupling. |
| VCC− | Negative supply | Accepts –2.5 V to –15 V in dual supply; connects to ground in single-supply mode (VCC− = GND). |
| VOUT− | Negative differential output | Complementary output to VOUT+; maintains precise amplitude and phase balance for common-mode rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables >80 dB common-mode noise rejection at 1 MHz and cancels even-order harmonics without external tuning. |
| Wide supply range support | Operates from 5 V single supply (VCC− = GND, VOCM = 2.5 V) to ±15 V - eliminates need for separate analog/digital rails. |
| High slew rate with fast settling | 650 V/µs slew rate and 247 ns settling to 0.01% enable accurate capture of fast transient signals in high-speed digitization. |
| Low input voltage noise | 7.6 nV/√Hz input-referred noise preserves SNR in low-level sensor signal chains feeding 16-bit ADCs. |
| VOCM-controlled output bias | Allows direct connection to ADC VREF pins via bypass capacitor - simplifies level alignment and improves PSRR. |
Applications
| ADC Driver | Differential Antialiasing |
|---|---|
|
Use Scenario: Driving the differential inputs of a 16-bit SAR ADC (e.g., THS1206) in a precision data logger with ±5 V analog front-end. IC Role / Device Role / Timing Role: Fully differential amplifier configured as single-ended-to-differential converter with gain = 1 and VOCM tied to ADC VREF. Use Value: Eliminates transformer coupling, reduces board area by 40%, and achieves –95 dBc SFDR at 20 MHz due to balanced output rejection of power-supply ripple. |
Use Scenario: Active low-pass filtering ahead of a 12-bit sigma-delta ADC in motor current sensing with 100 kHz bandwidth requirement. IC Role / Device Role / Timing Role: Differential op-amp implementing 2nd-order active antialias filter with R2=R3=1 kΩ, C1=C2=1.59 nF (fc = 100 kHz). Use Value: Provides >60 dB stopband attenuation at 500 kHz while maintaining <0.05% gain error across temperature via matched external resistors. |
| Single-Supply Sensor Interface | Differential Transmitter |
|
Use Scenario: Conditioning output of a 0–5 V rail-to-rail pressure sensor for digitization in battery-powered IoT node using 3.3 V MCU and 12-bit ADC. IC Role / Device Role / Timing Role: Single-supply fully differential amplifier with VOCM = 1.65 V (mid-rail), gain = 1, and input biased at 2.5 V via resistor divider. Use Value: Extends effective dynamic range by 6 dB versus single-ended amplification and rejects EMI coupled equally onto sensor traces. |
Use Scenario: Transmitting differential analog video signals over 50 Ω coaxial cable in industrial machine vision system operating at 25 MHz pixel clock. IC Role / Device Role / Timing Role: Differential line driver with 20 Ω series output resistors, gain = 2, and VOCM set to 1.4 V for DC-coupled LVDS-compatible levels. Use Value: Delivers 1.4 VPP differential swing with <0.5% THD at 25 MHz and suppresses common-mode jitter induced by shared ground paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131IDGK | 150 MHz BW, 51 V/µs SR, 1.3 nV/√Hz noise - lower noise but slower slew rate than THS4151IDGK. | Better suited for low-frequency, ultra-low-noise applications (e.g., seismic sensor front-end); less ideal for >10 MSPS transient capture. | Select THS4131IDGK when input-referred noise dominates system SNR budget and slew-limited distortion is not critical. |
| THS4141IDGK | 160 MHz BW, 450 V/µs SR, 6.5 nV/√Hz noise - higher bandwidth and slew rate, but higher noise than THS4151IDGK. | Preferred for >50 MSPS sampling where bandwidth headroom and fast settling outweigh noise sensitivity. | Select THS4141IDGK when driving high-speed pipeline ADCs requiring >100 MHz small-signal bandwidth and sub-100 ns settling. |
Compared with THS4151IDGK, THS4131IDGK trades slew rate for lower noise in static-signal applications, while THS4141IDGK prioritizes bandwidth and speed over noise floor - making THS4151IDGK the balanced choice for general-purpose high-fidelity ADC drivers across 1–50 MSPS.
Availability
THS4151IDGK is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor signal conditioning, and high-speed ADC interface applications requiring stable component supply, extended temperature operation (–40°C to +85°C), and long-term production continuity.
Supply support for THS4151IDGK 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 digital signal technologies, with decades of expertise in high-performance amplifier design and manufacturing.
The THS415x family was engineered specifically for high-fidelity differential signal routing in data converter interfaces - emphasizing distortion suppression, common-mode rejection, and flexible supply operation across industrial, test & measurement, and communications systems.
FAQ
What is the operating temperature range for THS4151IDGK?
The THS4151IDGK is rated for –40°C to +85°C ambient operating temperature (I-suffix grade). This extended range supports deployment in industrial automation, outdoor instrumentation, and automotive under-hood environments where thermal stability is critical. All electrical specifications in the datasheet are guaranteed across this full range unless otherwise noted.
Does THS4151IDGK include a shutdown function?
No, THS4151IDGK does not include a shutdown pin or power-down mode. That feature is exclusive to the THS4150 variant (which has a PD pin). The THS4151IDGK is a fixed-function fully differential amplifier with continuous operation only - quiescent current remains ~18.5 mA at ±5 V supply across temperature.
How should the VOCM pin be used in single-supply operation of THS4151IDGK?
In single-supply operation (e.g., VCC+ = 5 V, VCC− = GND), the VOCM pin should be connected to a stable 2.5 V reference - either via a precision voltage divider from VCC+, an LDO, or directly to the ADC's VREF output (with 0.1 µF bypass capacitor). Leaving VOCM floating causes undefined output common-mode level and degraded distortion performance.
Can THS4151IDGK drive a 50 Ω transmission line directly?
No - THS4151IDGK must not drive 50 Ω loads directly. Its open-loop output resistance is 0.4 Ω, but driving low-impedance loads causes excessive current and thermal stress. For 50 Ω systems, use a minimum 20 Ω series resistor per output (VOUT+ and VOUT−) to isolate the amplifier, match source impedance, and maintain stability with typical PCB trace capacitance.
What resistor tolerance is required for optimal THS4151IDGK performance?
Resistors in the feedback network (Rf) and gain-setting path (Rg) must be matched to ≤0.1% tolerance or use monolithic matched arrays to preserve CMRR >80 dB and minimize second-harmonic distortion. 1% discrete resistors degrade CMRR by up to 20 dB and increase THD by 5–10 dB at 1 MHz - TI explicitly recommends 1% or better in the datasheet.
THS4151IDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
THS4151IDGK FAQ
1.How can I place an order for THS4151IDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4151IDGK 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 THS4151IDGK reliable?
The price and inventory of THS4151IDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4151IDGK is usually 5 days.
3.What payment methods are accepted for THS4151IDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4151IDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4151IDGK?
THS4151IDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4151IDGK 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 THS4151IDGK?
For technical support, including THS4151IDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4151IDGK requirements.
6.How does Aetrix verify that THS4151IDGK is sourced from the original manufacturer or authorized distributors?
All THS4151IDGK 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 THS4151IDGK meets industry standards.
7.What is the process for return or replacement of THS4151IDGK?
All THS4151IDGK units undergo pre-shipment inspection (PSI). If there is an issue with THS4151IDGK, 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 THS4151IDGK part is unused and in its original packaging.
Return procedure for THS4151IDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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