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Texas Instruments THS4151CDGN
- Part No.:
- THS4151CDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4151CDGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,013
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Product details
Overview
THS4151CDGN 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 (VCC = ±5 V), 650 V/µs slew rate (VCC = ±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 THS4151CDGN datasheet, THS4151CDGN pinout, THS4151CDGN application, or THS4151CDGN equivalent, key selection criteria include differential output swing (±3.9 V at ±5 V), VOCM-controlled common-mode level setting, resistor-matched gain configuration (Rf = 390 Ω, Rg = 390 Ω for G = 1), and thermal performance in MSOP PowerPAD™ package with θJA = 58.4°C/W.
Technical Context
The THS4151CDGN implements a true fully differential signal path using TI's BiComI complementary bipolar process, enabling balanced differential input-to-differential output operation without internal feedback splitting. Its architecture inherently rejects common-mode noise on both input and power rails while reducing second-harmonic distortion via symmetric signal cancellation.
It supports both differential-input/differential-output and single-ended-input/differential-output configurations. Gain is set externally by matched resistor pairs (e.g., Rf = Rg = 390 Ω for unity gain), and the VOCM pin directly controls output common-mode voltage-critical for interfacing with differential ADCs requiring precise mid-rail or reference-derived bias levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 150 MHz at ±5 V supply - enables wideband signal conditioning up to ~75 MHz Nyquist for high-speed ADCs |
| Slew Rate | 650 V/µs at ±15 V - supports fast transient response for large-signal step inputs without slewing distortion |
| Total Harmonic Distortion | –83 dB at 1 MHz, 2 Vpp output - ensures minimal spectral contamination in precision measurement front-ends |
| Input Voltage Noise | 7.6 nV/√Hz above 10 kHz - preserves SNR in low-noise analog signal chains feeding 12–16-bit ADCs |
| Output Voltage Swing | ±3.9 V at ±5 V supply into 800 Ω - delivers full-scale differential drive capability matching typical ADC input ranges |
| Common-Mode Input Range | VS– +1.5 V to VS+ –1.5 V - defines safe linear input operating window for rail-to-rail compatible design margins |
| Supply Voltage Range | ±2.5 V to ±15 V dual or 5 V single - supports flexible system-level power architecture including mixed-supply domains |
Pinout & Package
The THS4151CDGN is housed in an 8-pin MSOP PowerPAD™ package (DGN) with exposed thermal pad on underside, requiring connection to PCB copper pour for thermal management per TI SLMA002/SLMA004 guidelines. Package dimensions: 3.0 mm × 3.0 mm × 1.0 mm, pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input terminal | Accepts differential or single-ended input; paired with VIN+ to define VID = VIN+ − VIN− |
| VOCM | Output common-mode control | Sets average DC level of VOUT+ and VOUT−; bypass with 0.1 µF capacitor for stability |
| VCC+ | Positive supply rail | Connects to +VS; must be decoupled locally with 0.1 µF ceramic capacitor |
| VOUT+ | Positive differential output | Delivers amplified, phase-inverted or non-inverted signal depending on configuration |
| VIN+ | Non-inverting input terminal | Accepts differential or single-ended input; defines common-mode input range with VIN− |
| NC | No-connect terminal | Internally unused; leave unconnected and unbonded - not for grounding or routing |
| VCC− | Negative supply rail | Connects to –VS; requires local 0.1 µF ceramic decoupling |
| VOUT− | Negative differential output | Complementary output to VOUT+; together forms fully differential output pair |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables inherent common-mode noise rejection on input, output, and power supply paths - critical for EMI-prone industrial/data acquisition environments |
| Resistor-configurable gain | External Rf/Rg network (e.g., 390 Ω/390 Ω) sets precise gain without internal feedback limitations - supports G = 1 to G = 10 with <1% error using 1% resistors |
| VOCM-controlled output bias | Direct VOCM pin interface allows dynamic adjustment of output common-mode level - essential for seamless coupling to differential ADC references (e.g., Vref/2) |
| High slew rate + wide bandwidth | 650 V/µs slew rate and 150 MHz bandwidth maintain fidelity for fast transients and wideband signals - suitable for >10 MSPS sampling systems |
| Low distortion + low noise | –83 dB THD at 1 MHz and 7.6 nV/√Hz noise preserve signal integrity in high-resolution digitization - meets requirements for 14-bit+ effective resolution |
Applications
| High-Speed Data Acquisition Front-End | Differential ADC Driver |
|---|---|
Use Scenario: Conditioning sensor outputs (e.g., strain gauge, RTD bridge) before digitization in automated test equipment or medical imaging systems. IC Role / Device Role / Timing Role: Single-ended-to-differential converter and gain stage driving SAR or sigma-delta ADC inputs. Use Value: Eliminates need for external transformers or discrete op-amp pairs; VOCM alignment with ADC reference ensures optimal dynamic range utilization. | Use Scenario: Driving the differential inputs of high-resolution ADCs such as ADS8860 or THS1206 in precision instrumentation. IC Role / Device Role / Timing Role: Final-stage signal buffer and level shifter ensuring matched amplitude/phase across both ADC input pins. Use Value: Delivers ±3.9 V swing at ±5 V supply - matches typical 2 Vpp–4 Vpp ADC full-scale ranges while maintaining <–80 dB THD up to 10 MHz. |
| Active Antialias Filtering | Single-Supply Signal Conditioning |
Use Scenario: Implementing 2nd-order active low-pass filters ahead of ADCs to suppress out-of-band noise and prevent aliasing in vibration monitoring or audio digitization. IC Role / Device Role / Timing Role: Core amplification element in Sallen-Key or MFB filter topologies with differential output termination. Use Value: Maintains filter Q and cutoff accuracy under load due to low output impedance (0.4 Ω) and high open-loop gain (67 dB). | Use Scenario: Signal conditioning in battery-powered portable instruments where only a 5 V rail is available. IC Role / Device Role / Timing Role: Fully differential amplifier operating from single 5 V supply with VOCM internally biased to 2.5 V. Use Value: Enables transformerless differential drive to ADCs - reduces BOM count and eliminates magnetic component size/EMI concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131CDGN | 150 MHz BW, 51 V/µs slew rate, 1.3 nV/√Hz noise - lower noise but slower slew rate than THS4151CDGN | Better suited for ultra-low-noise, moderate-speed applications (e.g., audio ADC drivers); less ideal for fast transient-heavy waveforms | Select THS4131CDGN when input-referred noise dominates system SNR budget and slew-limited distortion is not a concern. |
| THS4141CDGN | 160 MHz BW, 450 V/µs slew rate, 6.5 nV/√Hz noise - higher bandwidth and faster slew than THS4151CDGN, slightly higher noise | Optimized for highest-speed applications (e.g., >20 MSPS digitizers); may require tighter layout control due to increased bandwidth sensitivity | Choose THS4141CDGN when system bandwidth exceeds 150 MHz and slew-induced distortion must be minimized at multi-volt step amplitudes. |
Compared with THS4131CDGN and THS4141CDGN, the THS4151CDGN strikes a balance between slew rate (650 V/µs), noise (7.6 nV/√Hz), and distortion (–83 dB THD), making it the preferred choice for general-purpose high-fidelity differential ADC driving where both speed and linearity are critical.
Availability
THS4151CDGN is available at Aetrix Electronics and suitable for high-speed data acquisition, precision instrumentation, and industrial ADC interface applications requiring stable component supply across extended temperature ranges (0°C to 70°C).
Supply support for THS4151CDGN 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.
The THS415x family was designed specifically for high-fidelity differential signal conditioning in data converter interfaces - emphasizing low distortion, wide bandwidth, and robust common-mode rejection in demanding measurement and communication systems.
FAQ
What is the recommended power supply decoupling for THS4151CDGN?
Each supply pin (VCC+ and VCC−) requires a local 0.1 µF ceramic capacitor placed within 2 mm of the pin and connected to a low-inductance ground plane. For high-current or noisy environments, add a 4.7 µF–10 µF bulk capacitor nearby. The VOCM pin also needs a 0.1 µF bypass capacitor to suppress noise coupling into the output common-mode level. These values are validated in TI's THS4151CDGN evaluation board layout.
Does THS4151CDGN support single-supply operation?
Yes, THS4151CDGN operates from a single 5 V supply. In this mode, the VOCM pin defaults to mid-rail (2.5 V) if left unconnected, enabling direct interfacing with differential ADCs that accept 2.5 V common-mode input. Input common-mode range is limited to 1.5 V to 3.5 V, and output swing reaches ±3.9 V differentially - sufficient for most 5 V-domain ADC drivers.
How does resistor matching affect THS4151CDGN performance?
Resistor mismatch in the external Rf/Rg feedback network directly degrades CMRR, PSRR, and second-harmonic distortion. TI specifies ≤1% tolerance resistors for optimal performance. A 0.1% mismatch can reduce CMRR by >10 dB at 1 MHz and increase even-order harmonics. Matched thin-film arrays or precision discrete resistors are recommended for THS4151CDGN designs targeting <–90 dB THD.
Can THS4151CDGN drive capacitive loads directly?
No - THS4151CDGN is internally compensated for optimal bandwidth/slew rate and becomes unstable with >10 pF capacitive load directly at the output. For any capacitive load (e.g., PCB trace, ADC input capacitance), a series isolation resistor (≥20 Ω) must be placed between the THS4151CDGN output and the load. This maintains phase margin and prevents ringing, especially critical in high-frequency signal paths.
What is the function of the NC pin on THS4151CDGN?
The NC (No Connect) pin on THS4151CDGN is an unconnected, unbonded terminal inside the die. It serves no electrical function and must remain floating - do not tie to ground, supply, or any other node. Routing traces to or placing vias near the NC pin may introduce parasitic coupling; TI's layout guidelines specify keeping this pin isolated and unpopulated on the PCB.
THS4151CDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4151CDGN FAQ
1.How can I place an order for THS4151CDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4151CDGN 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 THS4151CDGN reliable?
The price and inventory of THS4151CDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4151CDGN is usually 5 days.
3.What payment methods are accepted for THS4151CDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4151CDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4151CDGN?
THS4151CDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4151CDGN 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 THS4151CDGN?
For technical support, including THS4151CDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4151CDGN requirements.
6.How does Aetrix verify that THS4151CDGN is sourced from the original manufacturer or authorized distributors?
All THS4151CDGN 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 THS4151CDGN meets industry standards.
7.What is the process for return or replacement of THS4151CDGN?
All THS4151CDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4151CDGN, 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 THS4151CDGN part is unused and in its original packaging.
Return procedure for THS4151CDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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