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Texas Instruments THS4042IDGN
- Part No.:
- THS4042IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4042IDGN.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,611
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Product details
Overview
THS4042IDGN from Texas Instruments is a dual-channel, high-speed voltage-feedback operational amplifier designed for driving heavy capacitive loads in video and data-acquisition systems. It delivers 165 MHz bandwidth (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 direct buffering of ADC inputs and 75-Ω video lines.
For engineers reviewing the THS4042IDGN datasheet, THS4042IDGN pinout, THS4042IDGN application, or THS4042IDGN equivalent, this page provides verified electrical specifications, MSOP-8 package layout, dual-channel crosstalk performance (−64 dB at 1 MHz), differential gain/phase accuracy (0.01% / 0.01°), and real-world load-driving behavior across 0–1000 pF capacitance.
Technical Context
The THS4042IDGN uses a dielectrically isolated complementary bipolar process with GHz fT transistors, enabling wide bandwidth and low distortion. Its internal C-stable compensation dynamically adjusts phase margin based on capacitive load, maintaining stability without external components across CL = 0–1000 pF.
It supports both inverting and noninverting configurations at all gains, features independent null pins per channel (pins 1 & 8), and maintains 0.1% settling in 120 ns (±15 V, 5-V step). Channel-to-channel crosstalk is −64 dB at 1 MHz, confirming isolation suitable for dual-signal-path applications like stereo video or dual ADC buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB) | 165 MHz at CL = 0 pF - enables full-spectrum analog video (SD/HD) and >100 MSPS ADC driver use |
| Slew Rate | 400 V/µs at ±15 V - supports fast transient response for pulse amplification and composite video sync edges |
| Output Drive | 100 mA (typ) into 20 Ω - directly drives coaxial cables, back-terminated video lines, or low-Z ADC inputs |
| Differential Gain/Phase | 0.01% / 0.01° at NTSC, ±15 V - meets broadcast-grade video fidelity requirements without external correction |
| THD | −75 dBc at 1 MHz, RL = 150 Ω - ensures minimal harmonic contamination in high-fidelity signal chains |
| Supply Range | ±4.5 V to ±16.5 V dual supply - compatible with legacy ±5 V, ±12 V, and ±15 V industrial and test equipment rails |
| Input Voltage Noise | 14 nV/√Hz at 10 kHz - low enough for precision gain stages preceding high-resolution ADCs |
Pinout & Package
THS4042IDGN is housed in an 8-pin Plastic MSOP (DGN) package with PowerPAD™ thermal enhancement. The exposed thermal pad must be soldered to PCB copper for optimal junction temperature control (θJA = 58.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Null | Offset null adjustment terminal for Channel 1; connect potentiometer wiper to VCC− for fine-tuning |
| 2 | Channel 1 Inverting Input | Inverting input node for first amplifier; high-impedance, matched to noninverting input for CMRR optimization |
| 3 | Channel 1 Noninverting Input | Noninverting input node for first amplifier; common-mode range extends to ±14.3 V at ±15 V supply |
| 4 | VCC− | Negative supply rail connection; decoupling capacitor required within 1 cm for stability |
| 5 | VCC+ | Positive supply rail connection; separate bypassing from VCC− prevents ground bounce coupling |
| 6 | Channel 2 Output | Amplified output of second channel; capable of ±13.6 V swing into 1 kΩ load at ±15 V supply |
| 7 | Channel 2 Inverting Input | Inverting input for second amplifier; electrically isolated from Channel 1 to maintain −64 dB crosstalk |
| 8 | Channel 2 Null | Offset null adjustment terminal for Channel 2; independent of Channel 1 for dual calibration |
Key Features
| Feature | Design Value |
|---|---|
| C-Stable Compensation | Internally senses capacitive load and adds adaptive compensation - eliminates need for external isolation resistors up to 1000 pF |
| Unity-Gain Stable | Operates stably at gain = 1 in both inverting and noninverting configurations - simplifies design of video line drivers and unity-gain buffers |
| High Output Current | Delivers 100 mA continuous into 20 Ω - enables direct drive of 75-Ω coax without external current boosters |
| Low Distortion | −75 dBc THD at 1 MHz, 150 Ω load - preserves signal integrity in high-frequency instrumentation and video reconstruction |
| Dual Independent Null Pins | Pins 1 and 8 provide per-channel offset trimming - allows precise DC alignment in dual-path systems without shared calibration error |
Applications
| Video Line Driver | ADC Input Buffer |
|---|---|
Use Scenario: Driving 75-Ω SD/HD video signals over coaxial cable with minimal group delay and phase distortion. IC Role / Device Role / Timing Role: Dual-channel buffer amplifying composite, Y/C, or RGB video signals while preserving NTSC/PAL timing integrity. Use Value: 0.01% differential gain and 0.01° differential phase error ensure broadcast-compliant color fidelity without post-processing. |
Use Scenario: Conditioning analog sensor outputs before sampling by high-speed SAR or pipeline ADCs. IC Role / Device Role / Timing Role: High-slew-rate, low-noise buffer isolating source impedance and driving ADC sample-and-hold inputs. Use Value: 400 V/µs slew rate and 120 ns 0.1% settling support >100 MSPS sampling without aperture uncertainty. |
| Dual-Channel Instrumentation | Test Equipment Signal Generator |
Use Scenario: Simultaneous amplification of differential sensor pairs (e.g., strain gauge bridges or current shunts) in automated test systems. IC Role / Device Role / Timing Role: Matched dual op-amp providing gain, level-shifting, and drive capability with <−64 dB inter-channel crosstalk. Use Value: Independent null pins (pins 1 & 8) allow per-channel DC offset calibration, critical for precision ratiometric measurements. |
Use Scenario: Generating clean, high-amplitude test waveforms (sine, square, pulse) in benchtop signal sources. IC Role / Device Role / Timing Role: Final-stage output amplifier delivering ±13.6 V into 1 kΩ with <0.1% THD up to 1 MHz. Use Value: 165 MHz bandwidth and 400 V/µs slew rate enable accurate reproduction of fast-edged pulses and wideband modulation envelopes. |
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 |
|---|---|---|---|
| THS4032IDGN | 100 MHz bandwidth, lower noise (9 nV/√Hz), higher input bias current (20 µA) | Better suited for low-noise preamp stages; insufficient bandwidth for >75 MHz video or fast ADC buffering | Select when noise dominates over speed; avoid for video line driving or >100 MSPS ADC interface |
| THS4082IDGN | 175 MHz bandwidth, lower supply current (6.5 mA/ch), reduced output drive (60 mA) | Optimized for portable/battery-powered systems; cannot sustain 100 mA into 20 Ω loads | Choose for power-constrained designs where full 100 mA drive is unnecessary; verify load compatibility |
Compared with THS4042IDGN, THS4032IDGN trades bandwidth for noise performance and THS4082IDGN trades output current for power efficiency - making THS4042IDGN the only option among the three that simultaneously delivers 165 MHz, 400 V/µs, and 100 mA drive in an MSOP-8 package.
Availability
THS4042IDGN is available at Aetrix Electronics and suitable for video line driving, high-speed ADC buffering, and dual-channel instrumentation requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for THS4042IDGN 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 heritage in high-performance op-amps and signal-chain solutions.
The THS4042IDGN belongs to TI's C-Stable high-speed op-amp family, engineered specifically for robust capacitive-load driving in video, test equipment, and data acquisition - prioritizing stability, fidelity, and ease of use over generic amplification.
FAQ
What is the operating temperature range for THS4042IDGN?
The THS4042IDGN is rated for industrial operation from −40°C to +85°C, as indicated by its "I" suffix. This range is validated across all key parameters including bandwidth, slew rate, and distortion - ensuring reliable performance in factory automation, outdoor test gear, and embedded vision systems where ambient temperatures fluctuate widely. THS4042IDGN maintains specified 165 MHz bandwidth and 0.01% differential gain error across this full range.
Does THS4042IDGN require external compensation for capacitive loads?
No, THS4042IDGN does not require external compensation for capacitive loads up to 1000 pF due to its patented C-Stable architecture. Internal circuitry senses output capacitance and adapts dominant-pole compensation in real time. This eliminates the need for series isolation resistors in most applications - though a 20 Ω resistor is recommended for marginal cases (e.g., >1000 pF or long PCB traces). THS4042IDGN remains unity-gain stable under all tested CL conditions.
Can THS4042IDGN drive a 75-Ω video line directly?
Yes, THS4042IDGN can drive a 75-Ω video line directly. Its 100 mA output current capability and ±13.6 V output swing into 1 kΩ (±11.5 V into 250 Ω) support full-amplitude video signals. For optimal impedance matching and ringing suppression, place a 75 Ω series resistor at the output - which simultaneously isolates capacitance and establishes proper source termination. THS4042IDGN's 0.01% differential gain error confirms suitability for broadcast-quality video.
What is the purpose of pins 1 and 8 on THS4042IDGN?
Pins 1 and 8 are independent offset null terminals for Channel 1 and Channel 2, respectively. Each connects to an internal nulling network allowing fine adjustment of input offset voltage via an external potentiometer (e.g., 10 kΩ) tied between the pin and VCC−. This enables per-channel DC calibration - critical in dual-path applications like stereo video or differential sensor conditioning where mismatched offsets degrade common-mode rejection or measurement accuracy. THS4042IDGN's dual-null architecture avoids cross-talk between channels during trimming.
How does THS4042IDGN compare to THS4041 in terms of pin compatibility and performance?
THS4042IDGN and THS4041CDGN share identical MSOP-8 (DGN) pinouts and electrical specs per channel - but THS4042IDGN integrates two fully independent amplifiers in one package, while THS4041CDGN contains only one. Both deliver 165 MHz bandwidth, 400 V/µs slew rate, and C-Stable operation. THS4042IDGN's channel-to-channel crosstalk is −64 dB at 1 MHz, confirming functional independence. No PCB redesign is needed when upgrading from single to dual channel using the same DGN footprint.
THS4042IDGN 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:
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4042IDGN FAQ
1.How can I place an order for THS4042IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4042IDGN 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 THS4042IDGN reliable?
The price and inventory of THS4042IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4042IDGN is usually 5 days.
3.What payment methods are accepted for THS4042IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4042IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4042IDGN?
THS4042IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4042IDGN 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 THS4042IDGN?
For technical support, including THS4042IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4042IDGN requirements.
6.How does Aetrix verify that THS4042IDGN is sourced from the original manufacturer or authorized distributors?
All THS4042IDGN 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 THS4042IDGN meets industry standards.
7.What is the process for return or replacement of THS4042IDGN?
All THS4042IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4042IDGN, 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 THS4042IDGN part is unused and in its original packaging.
Return procedure for THS4042IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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