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Texas Instruments THS4042CDGNR
- Part No.:
- THS4042CDGNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4042CDGNR.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,791
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Product details
Overview
THS4042CDGNR from Texas Instruments is a dual-channel, high-speed voltage-feedback operational amplifier optimized for driving capacitive loads up to 1000 pF while maintaining stability and low distortion. It delivers 165 MHz small-signal bandwidth (±15 V, CL = 0 pF), 400 V/µs slew rate, ±100 mA output drive, and −75 dBc THD at 1 MHz into 150 Ω - making it suitable for video line driving, ADC buffering, and high-fidelity signal conditioning.
For engineers reviewing the THS4042CDGNR datasheet, THS4042CDGNR pinout, THS4042CDGNR application, or THS4042CDGNR equivalent, this page provides verified specifications, package-validated pin functions, real-world video and data-acquisition use cases, and two confirmed alternative amplifiers with documented performance trade-offs.
Technical Context
The THS4042CDGNR uses a dielectrically isolated complementary bipolar process enabling GHz fT transistors, delivering wide bandwidth and fast settling (120 ns to 0.1%). Its internal C-stable compensation dynamically adjusts phase margin in response to capacitive load, eliminating external compensation in most configurations.
It supports both inverting and noninverting unity-gain stable operation across ±4.5 V to ±16.5 V supplies, features independent null pins per channel (pins 1 and 8), and maintains <0.01% differential gain / 0.01° differential phase error in NTSC video applications at ±15 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 165 MHz (−3 dB, ±15 V, CL = 0 pF): enables full HD video baseband amplification without roll-off |
| Slew rate | 400 V/µs (±15 V, 20-V step): supports fast transient response in pulse-amplifier and DAC output stages |
| THD @ 1 MHz | −75 dBc (±15 V, RL = 150 Ω): ensures minimal harmonic contamination in 10-bit+ data acquisition systems |
| Output drive | ±100 mA (±15 V, RL = 20 Ω): drives coaxial cables, multiple 75-Ω terminations, or low-impedance ADC inputs directly |
| Supply range | ±4.5 V to ±16.5 V (dual) or +9 V to +33 V (single): compatible with legacy ±12 V, ±15 V, and modern low-voltage industrial rails |
| Differential gain/phase | 0.01% / 0.01° (NTSC, ±15 V): meets broadcast-grade video fidelity requirements without post-correction |
| Channel crosstalk | −64 dB (1 MHz, ±15 V): isolates dual-channel signals in simultaneous sampling or stereo analog processing |
Pinout & Package
THS4042CDGNR is housed in an 8-pin MSOP PowerPAD™ (DGN) package with exposed thermal pad for enhanced power dissipation (θJA = 58.4°C/W). The PowerPAD must be soldered to PCB ground plane for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null (Ch1) | Offset null connection for Channel 1; tied to VCC− via potentiometer for precision DC trimming |
| 2 | Inverting input (Ch1) | High-impedance differential input node for Channel 1; 1.5 pF input capacitance limits high-Z source bandwidth |
| 3 | Noninverting input (Ch1) | High-impedance differential input node for Channel 1; common-mode range extends to ±14.3 V at ±15 V supply |
| 4 | VCC− | Negative supply rail; must be decoupled with 0.1 µF ceramic capacitor near pin |
| 5 | VCC+ | Positive supply rail; must be decoupled with 0.1 µF ceramic capacitor near pin |
| 6 | Output (Ch2) | Low-impedance output capable of ±100 mA sink/source; requires series isolation resistor when driving >100 pF |
| 7 | Inverting input (Ch2) | High-impedance differential input node for Channel 2; electrically identical to Pin 2 |
| 8 | Null (Ch2) | Offset null connection for Channel 2; independent of Pin 1 for dual-channel calibration |
Key Features
| Feature | Design Value |
|---|---|
| C-stable architecture | Internally senses capacitive load and adds dynamic compensation - eliminates need for external RC networks when driving 100–1000 pF |
| Video-optimized linearity | 0.01% differential gain / 0.01° differential phase error at ±15 V ensures broadcast-compliant NTSC/PAL signal integrity |
| High-output current | ±100 mA drive into 20 Ω allows direct termination of 75-Ω video lines or parallel ADC inputs without external buffers |
| Wide supply flexibility | Operates from ±4.5 V to ±16.5 V dual or +9 V to +33 V single supply - supports legacy and modern system rails |
| Dual independent null pins | Pins 1 and 8 provide per-channel offset adjustment - enables precise DC calibration in dual-path instrumentation |
Applications
| Video Signal Distribution | High-Speed Data Acquisition |
|---|---|
|
Use Scenario: Driving multiple 75-Ω coaxial video lines from a single RGB or YPbPr source in broadcast equipment. IC Role / Device Role / Timing Role: Dual-channel buffer amplifier with unity-gain stable operation and ultra-low differential phase/gain error. Use Value: Maintains <0.01° timing skew between channels and preserves color fidelity across 100 m cable runs without equalization. |
Use Scenario: Buffering high-resolution SAR ADC outputs in automated test equipment requiring low noise and fast settling. IC Role / Device Role / Timing Role: Output driver stage with 120 ns settling to 0.1% and −75 dBc THD at 1 MHz. Use Value: Enables accurate 12-bit+ sampling at ≥1 MSPS by minimizing code-dependent distortion and aperture uncertainty. |
| Medical Imaging Front-End | Communications Baseband Processing |
|
Use Scenario: Amplifying low-amplitude ultrasound echo signals prior to digitization in portable imaging systems. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate gain stage with 14 nV/√Hz input voltage noise and 400 V/µs slew rate. Use Value: Preserves weak signal integrity across 1–10 MHz bandwidth while rejecting power-supply ripple (PSRR = 84 dB). |
Use Scenario: Transmit path filtering and level-shifting in broadband wireless infrastructure for DOCSIS or LTE baseband. IC Role / Device Role / Timing Role: High-linearity I/Q channel driver with −64 dB inter-channel crosstalk at 1 MHz. Use Value: Minimizes I/Q imbalance-induced EVM degradation in 64-QAM and higher modulation schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4032CDGNR | Lower 100 MHz bandwidth, 100 V/µs slew rate, but lower 1.8 nV/√Hz input voltage noise | Better suited for low-noise, medium-bandwidth applications (e.g., sensor front-ends); insufficient for >120 MHz video | Select when noise dominates over speed; avoid for >80 MHz closed-loop designs |
| THS4082IDGNR | 175 MHz bandwidth, 250 V/µs slew rate, 3.3 mA/ch supply current (vs. 9.5 mA), but only ±30 mA output drive | Optimized for battery-powered portable instruments; cannot drive 75-Ω lines or heavy capacitive loads | Select for low-power, high-bandwidth portable systems where output current ≤ ±30 mA is sufficient |
Compared with THS4042CDGNR, THS4032CDGNR trades bandwidth for lower noise and THS4082IDGNR trades output drive and slew rate for reduced power - neither offers equivalent capacitive-load stability or video-grade linearity, making THS4042CDGNR the sole choice for demanding video and high-current analog signal routing.
Availability
THS4042CDGNR is available at Aetrix Electronics and suitable for video distribution systems, high-speed data acquisition platforms, and medical imaging front-ends requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for THS4042CDGNR 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 signal chain solutions.
The THS4042CDGNR belongs to TI's C-Stable high-speed op-amp family, engineered specifically for uncompromised video fidelity, robust capacitive-load driving, and precision analog signal conditioning in broadcast, test, and medical equipment.
FAQ
What is the maximum capacitive load the THS4042CDGNR can drive without external compensation?
The THS4042CDGNR is internally compensated to remain stable with capacitive loads up to 1000 pF in unity-gain configuration. At CL = 1000 pF, it retains 35 MHz bandwidth (−3 dB) and exhibits minimal peaking (<1 dB) - no external compensation is required. For loads >1000 pF or critical phase-margin applications, a 20 Ω series isolation resistor at the output is recommended. This behavior is validated in the THS4042CDGNR datasheet Figure 6 and Figure 24.
Does the THS4042CDGNR support single-supply operation?
Yes, the THS4042CDGNR supports single-supply operation from +9 V to +33 V. Its input common-mode range extends to within 1.2 V of the negative rail (e.g., 0 V at +9 V supply), and output swing reaches within 1.5 V of each rail under typical loads. For rail-to-rail input/output performance, external level-shifting or biasing is required. This capability is specified in the THS4042CDGNR "Recommended Operating Conditions" table on page 3 of the datasheet.
How does the THS4042CDGNR achieve its 0.01% differential gain accuracy in video applications?
The THS4042CDGNR achieves 0.01% differential gain error through precision laser-trimmed internal resistor networks and a highly linear voltage-feedback architecture built on TI's 30-V dielectrically isolated bipolar process. This minimizes gain nonlinearity across the 0–4.2 MHz NTSC luminance band and 0–4.43 MHz PAL chroma band. Measurement is performed at ±15 V supply with 40 IRE NTSC modulation and ±100 IRE ramp, as documented in the THS4042CDGNR electrical characteristics table (page 4) and Figure 33.
Can the THS4042CDGNR replace the THS4041CDGNR in a dual-channel design?
No - the THS4042CDGNR is a dual-channel device, while the THS4041CDGNR is single-channel. Using two THS4041CDGNRs would occupy more board area, increase component count, and introduce channel-to-channel mismatch not present in the monolithic THS4042CDGNR. The THS4042CDGNR provides matched gain, phase, and offset tracking between channels (−64 dB crosstalk), which is essential for stereo audio, I/Q processing, or differential signaling - a benefit not achievable with discrete THS4041CDGNRs.
What thermal considerations apply to the THS4042CDGNR in MSOP PowerPAD™ (DGN) package?
The THS4042CDGNR in the DGN package has θJA = 58.4°C/W when mounted on a 3″ × 3″ PCB with 2 oz. copper and soldered PowerPAD. To maintain TJ ≤ 125°C at maximum ambient (70°C), total power dissipation must stay below 2.14 W (per datasheet Dissipation Rating Table, page 3). This requires proper thermal vias under the PowerPAD, ground-plane connection, and derating above 25°C ambient. Exceeding absolute max junction temperature (150°C) risks permanent damage.
THS4042CDGNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 400V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 165 MHz
- Current - Input Bias:
- 2.5 µA
- Voltage - Input Offset:
- 2.5 mV
- Current - Supply:
- 8mA (x2 Channels)
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4042CDGNR FAQ
1.How can I place an order for THS4042CDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4042CDGNR 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 THS4042CDGNR reliable?
The price and inventory of THS4042CDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4042CDGNR is usually 5 days.
3.What payment methods are accepted for THS4042CDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4042CDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4042CDGNR?
THS4042CDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4042CDGNR 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 THS4042CDGNR?
For technical support, including THS4042CDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4042CDGNR requirements.
6.How does Aetrix verify that THS4042CDGNR is sourced from the original manufacturer or authorized distributors?
All THS4042CDGNR 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 THS4042CDGNR meets industry standards.
7.What is the process for return or replacement of THS4042CDGNR?
All THS4042CDGNR units undergo pre-shipment inspection (PSI). If there is an issue with THS4042CDGNR, 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 THS4042CDGNR part is unused and in its original packaging.
Return procedure for THS4042CDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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