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Texas Instruments THS4042CDG4
- Part No.:
- THS4042CDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4042CDG4.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,342
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Product details
Overview
THS4042CDG4 from Texas Instruments is a dual-channel, high-speed voltage-feedback operational amplifier designed for driving capacitive loads in video and data acquisition systems. It delivers 165 MHz bandwidth (−3 dB, CL = 0 pF), 400 V/µs slew rate, ±15 V supply operation, unity-gain stability, and drives up to 100 mA into 20 Ω - enabling use in HD video line drivers and ADC buffer stages.
For engineers reviewing the THS4042CDG4 datasheet, THS4042CDG4 pinout, THS4042CDG4 application, or THS4042CDG4 equivalent, key selection criteria include capacitive-load stability, differential gain/phase error (<0.01% / <0.01°), low THD (−75 dBc at 1 MHz), wide supply range (±4.5 V to ±16.5 V), and SOIC-8 package compatibility with legacy layouts.
Technical Context
The THS4042CDG4 employs a dielectrically isolated complementary bipolar process with GHz fT transistors, enabling voltage-feedback architecture optimized for speed and stability. Its internal C-stable compensation dynamically adjusts dominant pole response based on capacitive load magnitude, maintaining phase margin across 0–1000 pF without external components.
It supports both inverting and noninverting configurations at all gains, features matched dual channels with −64 dB crosstalk at 1 MHz, and integrates null pins (1 & 8) for offset trimming - a capability retained from the single-channel THS4041 but not implemented in the THS4042's D-package variant per datasheet Figure 1 and pinout table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB) | 165 MHz at CL = 0 pF - enables full-spectrum analog video signal amplification without roll-off |
| Slew Rate | 400 V/µs at ±15 V - supports fast transient response for 5-V step settling in ≤120 ns (0.1%) |
| THD | −75 dBc at 1 MHz, RL = 150 Ω - ensures minimal harmonic distortion in broadcast-quality video paths |
| Differential Gain Error | 0.01% at NTSC, ±15 V - preserves color fidelity in composite video transmission |
| Output Drive | 100 mA into 20 Ω - directly drives coaxial cables and multiple parallel loads without external buffers |
| Supply Range | ±4.5 V to ±16.5 V - accommodates industrial and broadcast power rails while maintaining performance |
| Input Voltage Noise | 14 nV/√Hz at 10 kHz - limits noise contribution in medium-bandwidth precision signal chains |
Pinout & Package
THS4042CDG4 is housed in an 8-pin SOIC (D) package with standard JEDEC MS-012AC footprint and 1.27 mm pitch. The package is surface-mount, RoHS-compliant, and rated for 0°C to 70°C operation (C-suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null (IN− offset adjust) | No internal connection in THS4042CDG4 - unused; must be left open or tied to VCC− per datasheet note |
| 2 | 1IN− | Inverting input of Channel 1 - accepts feedback network for closed-loop gain configuration |
| 3 | 1IN+ | Noninverting input of Channel 1 - referenced to ground or common-mode bias in single-supply designs |
| 4 | VCC− | Negative supply rail - connects to system ground in single-supply mode or negative rail in dual-supply systems |
| 5 | 2OUT | Output of Channel 2 - drives downstream load; requires series isolation resistor for >100 pF capacitive loads |
| 6 | 2IN− | Inverting input of Channel 2 - electrically isolated from Channel 1; supports independent gain setting |
| 7 | 2IN+ | Noninverting input of Channel 2 - maintains channel-to-channel independence for differential or dual-path applications |
| 8 | VCC+ | Positive supply rail - supplies both amplifiers; decoupling capacitor required within 1 cm of pin |
Key Features
| Feature | Design Value |
|---|---|
| C-Stable compensation | Internally adapts dominant pole for stable operation with 0–1000 pF capacitive loads - eliminates need for external compensation networks |
| Video-optimized linearity | 0.01% differential gain and 0.01° differential phase error at NTSC - meets broadcast video fidelity requirements |
| Dual-channel matching | −64 dB crosstalk at 1 MHz - enables simultaneous processing of stereo audio or dual-sensor signals without interference |
| High output current | 100 mA drive into 20 Ω - supports direct termination of 75 Ω video lines with series 55 Ω resistor |
| Wide supply flexibility | Operates from ±4.5 V to ±16.5 V or 9–33 V single supply - simplifies integration into mixed-voltage systems |
Applications
| HD Video Line Driver | ADC Input Buffer |
|---|---|
Use Scenario: Driving 75 Ω coaxial cable runs from video DAC to monitor or encoder in HD broadcast equipment. IC Role / Device Role / Timing Role: Dual-channel THS4042CDG4 buffers and isolates two video signals (e.g., Y/C or RGB) while preserving timing integrity and amplitude flatness. Use Value: 0.01% differential gain error ensures accurate color reproduction; 165 MHz bandwidth supports 1080p60 signal passband without attenuation. | Use Scenario: Conditioning analog sensor outputs prior to sampling by 12-bit+ SAR or pipeline ADCs in test instrumentation. IC Role / Device Role / Timing Role: THS4042CDG4 provides low-noise, high-slew-rate buffering with unity-gain stability to prevent ADC aperture uncertainty from source impedance. Use Value: 400 V/µs slew rate settles 5-V steps in ≤120 ns (0.1%), minimizing conversion error; 14 nV/√Hz input noise avoids degrading effective resolution. |
| Medical Imaging Signal Chain | High-Speed Data Acquisition Front-End |
Use Scenario: Amplifying low-amplitude ultrasound echo signals in portable imaging systems before digitization. IC Role / Device Role / Timing Role: THS4042CDG4 serves as a low-distortion, wide-bandwidth gain stage in multi-channel receive beamformer ASIC interfaces. Use Value: −75 dBc THD at 1 MHz prevents harmonic artifacts from masking weak echoes; matched dual channels enable time-aligned I/Q path processing. | Use Scenario: Multiplexed analog front-end for 10+ MS/s data loggers capturing vibration, acoustic, or RF IF signals. IC Role / Device Role / Timing Role: THS4042CDG4 provides channelized buffering with fast settling to support interleaved sampling across multiple inputs. Use Value: 120 ns 0.1% settling time allows ≥8 MS/s per channel; ±16.5 V supply headroom supports ±10 V input ranges without clipping. |
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 |
|---|---|---|---|
| THS4042CDGN | Same electrical specs; MSOP-8 package (3 × 3 mm) with PowerPAD thermal pad - 58.4°C/W θJA vs 167°C/W for SOIC | Better thermal performance in space-constrained PCBs; requires re-layout due to different footprint and thermal pad soldering | Select when board area or junction temperature under high load is critical; verify thermal pad grounding per TI SLOA112 |
| THS4032CD | 100 MHz bandwidth, 160 V/µs slew rate, lower 14 nV/√Hz noise - optimized for low-noise over raw speed | Preferred in audio preamps or precision sensor interfaces where SNR > bandwidth; insufficient for 1080p video | Choose for sub-100 MHz applications prioritizing noise floor over slew rate; not suitable for video line driving |
Compared with THS4042CDGN, THS4042CDG4 offers identical performance in a legacy SOIC-8 footprint ideal for drop-in replacement in existing designs; versus THS4032CD, it trades noise density for 2.5× higher bandwidth and 2.5× faster slew rate - making it uniquely suited for video and fast transient capture.
Availability
THS4042CDG4 is available at Aetrix Electronics and suitable for HD video line driving, ADC input buffering, medical imaging front-ends, high-speed data acquisition, and broadcast equipment requiring stable component supply across long production lifecycles.
Supply support for THS4042CDG4 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 connectivity technologies with over 90 years of innovation in high-performance analog ICs.
The THS4042CDG4 belongs to TI's high-speed voltage-feedback op-amp product line, engineered specifically for demanding video, instrumentation, and communications applications requiring unity-gain stability and capacitive-load drive capability.
FAQ
What is the maximum capacitive load the THS4042CDG4 can drive without oscillation?
The THS4042CDG4 is internally compensated to remain stable with capacitive loads up to 1000 pF, as confirmed by datasheet Figures 6–7 and 24–25. At 1000 pF, overshoot remains below 15% for 1-V and 5-V steps under ±15 V supply. For loads >100 pF, adding a 20–75 Ω series isolation resistor at the output improves peaking margin without affecting DC gain - a technique validated in TI Application Report SLOA013. THS4042CDG4 does not require external compensation networks.
Does the THS4042CDG4 support single-supply operation?
Yes, the THS4042CDG4 supports single-supply operation from 9 V to 33 V, as specified in the Recommended Operating Conditions table (page 3). When used in single-supply mode, the common-mode input voltage range extends from 3.8 V to 4.3 V (at ±5 V equiv.) or ±13.8 V to ±14.3 V (at ±15 V equiv.), and output swing reaches ±3.5 V into 1 kΩ. Designers must bias inputs within VICR and use rail-to-rail compatible downstream components; the THS4042CDG4 itself is not rail-to-rail output.
What is the purpose of Pins 1 and 8 on the THS4042CDG4?
Pins 1 and 8 on the THS4042CDG4 are labeled "NULL" in the datasheet pinout diagram (page 1), but they have no internal connection - confirmed by the "NC − No internal connection" note in Figure 1 and absence of functional description in the Electrical Characteristics tables. Unlike the THS4041, the THS4042 does not implement offset-null circuitry. These pins must be left unconnected or tied to VCC−; floating them poses no risk, but routing traces to them is unnecessary and may introduce parasitic capacitance.
How does the THS4042CDG4 compare to the THS4041 in terms of performance and pin compatibility?
The THS4042CDG4 is the dual-channel counterpart to the single-channel THS4041, sharing identical per-channel specifications: 165 MHz bandwidth, 400 V/µs slew rate, 0.01% differential gain error, and C-stable capacitive-load drive. Pin compatibility exists only within channel subsets - THS4042CDG4's Channel 1 uses Pins 2–4 and 8 (1IN−, 1IN+, VCC−, VCC+), matching THS4041's Pin 2–4 and 8, but THS4042CDG4 adds Channel 2 on Pins 5–7 (2OUT, 2IN−, 2IN+). No pin-to-pin replacement is possible between single- and dual-channel variants.
Is the THS4042CDG4 suitable for driving 75 Ω video lines in NTSC/PAL systems?
Yes, the THS4042CDG4 is explicitly characterized for video applications: it achieves 0.01% differential gain error and 0.01° differential phase error under NTSC conditions at ±15 V supply (page 4), and its 100 mA output drive supports direct 75 Ω termination when paired with a 55 Ω series resistor (per TI Application Report SLOA013). Bandwidth exceeds 165 MHz - well above the 5.5 MHz PAL/NTSC luminance bandwidth - ensuring flat group delay and minimal edge ringing in composite video waveforms.
THS4042CDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SOIC
THS4042CDG4 FAQ
1.How can I place an order for THS4042CDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4042CDG4 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 THS4042CDG4 reliable?
The price and inventory of THS4042CDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4042CDG4 is usually 5 days.
3.What payment methods are accepted for THS4042CDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4042CDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4042CDG4?
THS4042CDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4042CDG4 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 THS4042CDG4?
For technical support, including THS4042CDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4042CDG4 requirements.
6.How does Aetrix verify that THS4042CDG4 is sourced from the original manufacturer or authorized distributors?
All THS4042CDG4 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 THS4042CDG4 meets industry standards.
7.What is the process for return or replacement of THS4042CDG4?
All THS4042CDG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS4042CDG4, 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 THS4042CDG4 part is unused and in its original packaging.
Return procedure for THS4042CDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4042CDG4 Tags
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