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Texas Instruments THS4151IDGN
- Part No.:
- THS4151IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4151IDGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
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Product details
Overview
THS4151IDGN from Texas Instruments is a high-speed fully differential amplifier optimized for precision ADC driving, antialiasing, and differential signal conditioning in industrial and test equipment. 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 THS4151IDGN datasheet, THS4151IDGN pinout, THS4151IDGN application, or THS4151IDGN 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/Rg), and thermal performance in MSOP PowerPAD™ package with θJA = 58.4°C/W.
Technical Context
The THS4151IDGN 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 common-mode levels. The device maintains stable operation with 0.1 µF bypassing on VOCM and requires matched feedback resistors (≤1% tolerance) to preserve CMRR > –83 dB and PSRR > 65 dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 150 MHz at ±5 V supply - enables baseband signal conditioning up to UHF frequencies in data acquisition systems |
| Slew Rate | 650 V/µs at ±15 V - supports fast transient response for high-resolution, high-speed ADC drivers |
| Total Harmonic Distortion | –83 dB at 1 MHz, VO = 2 VPP - ensures minimal spectral contamination in precision measurement front-ends |
| Input Voltage Noise | 7.6 nV/√Hz above 10 kHz - preserves SNR in wideband sensor interfaces and RF sampling chains |
| Common-Mode Input Range | VCC– +1.5 V to VCC+ –1.5 V - accommodates rail-to-rail input signals while maintaining linearity |
| Output Voltage Swing | ±3.6 V min (±5 V supply), ±11 V min (±15 V supply) - delivers full-scale differential drive into 800 Ω loads |
| Supply Range | ±2.5 V to ±15 V dual or 5 V to 30 V single - supports flexible power architecture in mixed-signal PCBs |
Pinout & Package
THS4151IDGN is housed in an 8-pin MSOP PowerPAD™ package (DGN), featuring thermal enhancement via exposed die pad soldered to PCB ground plane. Package dimensions: 3.0 mm × 3.0 mm × 1.0 mm, pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Accepts differential or single-ended input; paired with VIN+ for fully differential operation |
| VOCM | Output common-mode control | Sets DC level of both outputs; bypass with 0.1 µF capacitor for noise immunity |
| VCC+ | Positive supply | Supports ±2.5 V to ±15 V dual or 5–30 V single supply; connects to power plane with low-ESR decoupling |
| VOUT+ | Positive differential output | Delivers amplified, phase-aligned signal; requires series resistor (≥20 Ω) for >10 pF capacitive loads |
| VIN+ | Non-inverting input | Completes differential input pair; matched impedance critical for CMRR optimization |
| NC | No connect | Internally unused; must remain unconnected and unstubbed on PCB |
| VCC− | Negative supply | Required for dual-supply operation; ties to ground in single-supply mode with VOCM = VCC/2 |
| VOUT− | Negative differential output | Provides complementary inverted output; enables rejection of common-mode interference at load |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables true differential signaling with inherent common-mode noise rejection and second-harmonic cancellation |
| VOCM-controlled output bias | Allows precise alignment of differential output common-mode level to ADC reference (e.g., VREF/2) without external resistive dividers |
| Wide supply range support | Operates from ±2.5 V to ±15 V dual or 5 V to 30 V single supply-reduces need for multiple rail generators in mixed-signal systems |
| High slew rate & bandwidth | 650 V/µs slew rate and 150 MHz bandwidth maintain fidelity for fast-settling, high-resolution ADC drivers (e.g., THS1206, THS1050) |
| Low distortion at high frequency | –83 dB THD at 1 MHz and –65 dB at 8 MHz ensures clean spectral performance in IF sampling and broadband instrumentation |
Applications
| ADC Driver for Precision Data Acquisition | Differential Antialiasing Filter Interface |
|---|---|
Use Scenario: Driving 12–16-bit SAR or sigma-delta ADCs (e.g., THS1206) in automated test equipment requiring low noise and high SFDR. IC Role / Device Role / Timing Role: Fully differential amplifier configured as single-ended-to-differential converter with VOCM tied to ADC reference voltage. Use Value: Eliminates transformer coupling, improves dynamic range by 6 dB over single-ended drivers, and reduces second-harmonic distortion by >15 dB. | Use Scenario: Integrating active low-pass filtering before high-speed ADC inputs to suppress out-of-band noise and prevent aliasing. IC Role / Device Role / Timing Role: Differential amplifier serving as unity-gain buffer and filter node in Sallen-Key or MFB topologies with matched R/C networks. Use Value: Maintains amplitude and phase balance across both signal paths, preserving differential integrity while achieving >60 dB stopband attenuation at Nyquist frequency. |
| Industrial Sensor Signal Conditioning | High-Fidelity Differential Transmitter |
Use Scenario: Amplifying low-level bridge sensor outputs (e.g., strain gauges, RTDs) in PLC analog input modules operating from ±15 V rails. IC Role / Device Role / Timing Role: Differential-input/differential-output amplifier with gain = 10, VOCM set to mid-supply for optimal headroom. Use Value: Rejects EMI-induced common-mode interference on long sensor cables and improves PSRR by >70 dB versus op-amp alternatives. | Use Scenario: Transmitting balanced analog signals over twisted-pair cabling in medical imaging or broadcast video systems. IC Role / Device Role / Timing Role: Single-ended source interface with differential output stage; VOCM adjusted to match receiver common-mode window. Use Value: Enables >80 dB common-mode rejection at cable ends, reduces radiated emissions by >10 dB, and supports >100 m transmission at 10 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131IDGN | 150 MHz BW, 51 V/µs SR, 1.3 nV/√Hz noise - lower noise but slower slew rate | Better suited for low-noise, moderate-speed applications (e.g., audio ADCs); less ideal for fast-settling 1 MSPS+ systems | Select THS4131IDGN when input-referred noise dominates system SNR budget and slew-limited settling is acceptable |
| THS4141IDGN | 160 MHz BW, 450 V/µs SR, 6.5 nV/√Hz noise - higher bandwidth and slew, higher noise | Optimized for ultra-fast settling in RF sampling receivers; requires tighter layout control due to higher sensitivity to parasitics | Select THS4141IDGN when >100 ns settling to 0.01% is required and THD < –70 dB at 10 MHz suffices |
Compared with THS4151IDGN, THS4131IDGN trades slew rate for lower noise, making it preferable in DC-coupled precision measurement; THS4141IDGN prioritizes speed over noise floor, better matching wideband communications front-ends where THS4151IDGN's balanced 150 MHz/650 V/µs/–83 dB THD profile offers superior all-around performance.
Availability
THS4151IDGN is available at Aetrix Electronics and suitable for industrial data acquisition, test & measurement instrumentation, and high-fidelity analog signal chains requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for THS4151IDGN 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 for industrial, automotive, and communications markets.
The THS415x family was designed specifically for high-fidelity differential signal conditioning-targeting ADC driver, antialiasing, and differential transmission roles in precision measurement and high-speed data conversion systems.
FAQ
What is the maximum recommended capacitive load for THS4151IDGN without external isolation?
THS4151IDGN should not drive capacitive loads exceeding 10 pF directly. For larger loads-including PCB traces, connectors, or ADC input capacitance-TI recommends placing a minimum 20 Ω series resistor between each output (VOUT+, VOUT−) and the load. This isolates the amplifier from reactive loading, prevents peaking or oscillation, and maintains phase margin above 45° across its 150 MHz bandwidth. The THS4151IDGN datasheet confirms this in Figure 34 and the "Driving a Capacitive Load" section.
How does the VOCM pin function in single-supply operation of THS4151IDGN?
In single-supply operation (e.g., VCC+ = 5 V, VCC− = GND), the VOCM pin defaults to mid-rail (2.5 V) internally if left unconnected. To ensure stability and noise immunity, TI specifies a 0.1 µF ceramic capacitor from VOCM to ground. When interfacing with an ADC that provides a reference voltage (e.g., VREF = 2.5 V), connecting VOCM directly to VREF-bypassed with the same 0.1 µF cap-aligns the THS4151IDGN output common-mode level precisely with the ADC's input requirement, eliminating offset errors and maximizing dynamic range.
Can THS4151IDGN be used as a single-ended-to-differential converter without external inversion circuitry?
Yes, THS4151IDGN supports single-ended-to-differential conversion natively. With VIN+ grounded or biased, and the signal applied to VIN−, the device produces complementary outputs (VOUT+, VOUT−) referenced to VOCM. Gain is set by Rf/Rg per TI's recommended resistor table (e.g., Rf = 390 Ω, Rg = 390 Ω for gain = 1). This configuration avoids discrete inverters or additional op-amps, reduces component count, and preserves amplitude/phase balance-key for THS4151IDGN's role in ADC driver applications.
What thermal considerations apply to THS4151IDGN in the MSOP PowerPAD™ package?
The THS4151IDGN in DGN package has θJA = 58.4°C/W and θJC = 4.7°C/W. To avoid exceeding the 125°C maximum junction temperature for continuous reliability, the exposed PowerPAD™ must be soldered to a thermally robust PCB copper plane (≥2 cm², 2 oz Cu). TI's SLMA002/SLMA004 technical briefs mandate this connection; omitting it risks thermal runaway under 17.5 mA quiescent current (±15 V) or 21 mA (±5 V). Derating curves in the Dissipation Rating Table show usable power drops from 1.71 W at 25°C ambient to 685 mW at 85°C.
Does THS4151IDGN support shutdown mode, and how does it differ from THS4150IDGN?
No, THS4151IDGN does not include a shutdown pin. Only the THS4150 variant (e.g., THS4150IDGN) features a PD (Power Down) pin enabling ICC(SD) ≤ 1.3 mA at ±5 V. The THS4151IDGN lacks this function-its pinout replaces PD with NC (No Connect), as confirmed in the top-view diagrams and "AVAILABLE OPTIONS" table. Therefore, THS4151IDGN remains fully operational whenever powered; system-level power gating must occur upstream of VCC+/VCC− rails.
THS4151IDGN 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4151IDGN FAQ
1.How can I place an order for THS4151IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4151IDGN 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 THS4151IDGN reliable?
The price and inventory of THS4151IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4151IDGN is usually 5 days.
3.What payment methods are accepted for THS4151IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4151IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4151IDGN?
THS4151IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4151IDGN 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 THS4151IDGN?
For technical support, including THS4151IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4151IDGN requirements.
6.How does Aetrix verify that THS4151IDGN is sourced from the original manufacturer or authorized distributors?
All THS4151IDGN 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 THS4151IDGN meets industry standards.
7.What is the process for return or replacement of THS4151IDGN?
All THS4151IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4151IDGN, 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 THS4151IDGN part is unused and in its original packaging.
Return procedure for THS4151IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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