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Texas Instruments THS4042CDR
- Part No.:
- THS4042CDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4042CDR.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,874
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Product details
Overview
THS4042CDR 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 (CL = 0 pF), 400 V/µs slew rate, ±15 V supply operation, 0.01% differential gain error, and 100 mA output drive - enabling direct buffering of ADC inputs and 75-Ω video line driving.
For engineers reviewing the THS4042CDR datasheet, THS4042CDR pinout, THS4042CDR application, or THS4042CDR equivalent, this page provides verified specifications, SOIC-8 package layout, dual-channel video/ADC buffer use cases, and validated alternatives for high-fidelity analog signal paths requiring unity-gain stability and low distortion.
Technical Context
The THS4042CDR employs a dielectrically isolated complementary bipolar process with GHz fT transistors, enabling voltage-feedback architecture optimized for wide bandwidth and fast settling. Its internal C-stable compensation dynamically adjusts phase margin under capacitive loading up to 1000 pF without external components.
Each channel operates independently with matched AC performance: 165 MHz small-signal bandwidth at G = 1, 60 MHz at G = 2, and 6.3 MHz full-power bandwidth (±15 V, 20 VPP). Channel-to-channel crosstalk is −64 dB at 1 MHz, confirming isolation suitable for dual-path signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB) | 165 MHz at G = 1, CL = 0 pF - supports >100 MSPS sampling in ADC driver applications |
| Slew Rate | 400 V/µs at ±15 V - enables clean 20-VPP step response within 120 ns to 0.1% |
| Total Harmonic Distortion | −75 dBc at 1 MHz, RL = 150 Ω - meets broadcast video fidelity requirements (NTSC/PAL) |
| Differential Gain/Phase Error | 0.01% / 0.01° at ±15 V - ensures color accuracy in composite video distribution |
| Output Drive Current | 100 mA (typ) into 20 Ω - drives heavy loads including coaxial cables and multiple 150-Ω terminations |
| Supply Range | ±4.5 V to ±16.5 V dual supply - compatible with legacy ±5 V, ±12 V, and ±15 V systems |
| Input Offset Voltage | 10 mV (max) over full temperature range - minimizes DC error in precision gain stages |
Pinout & Package
THS4042CDR is housed in an 8-pin SOIC (D) package with standard JEDEC outline, 1.27 mm pitch, and surface-mount compatibility. Thermal performance is characterized at θJA = 167°C/W (JEDEC Low-K board).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NULL (Channel 1) | Offset null connection for Channel 1; unused in THS4042CDR (dual version lacks null pins per channel) |
| 2 | 1IN− | Inverting input for Channel 1 - accepts differential or single-ended feedback configurations |
| 3 | 1IN+ | Noninverting input 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 - shared by both amplifiers; requires local 0.1 µF bypass |
| 6 | 1OUT | Output of Channel 1 - capable of ±13.6 V swing into 1 kΩ load at ±15 V supply |
| 7 | 2OUT | Output of Channel 2 - electrically isolated; crosstalk −64 dB at 1 MHz confirms independence |
| 8 | 2IN− | Inverting input for Channel 2 - pin-compatible with Channel 1 for symmetrical PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| C-stable capacitive-load drive | Internally compensates for loads up to 1000 pF without external components - eliminates need for output isolation resistors in most video applications |
| Unity-gain stable | Guaranteed stability at G = 1 in both inverting and noninverting configurations - simplifies design of gain-of-one buffers |
| Low-distortion video performance | 0.01% differential gain and 0.01° differential phase errors - preserves color fidelity in NTSC systems |
| High-output current | 100 mA typical drive into 20 Ω - supports driving multiple 75-Ω video lines or long traces without external buffers |
| Wide supply range | Operates from ±4.5 V to ±16.5 V - enables reuse across ±5 V instrumentation and ±15 V legacy test equipment |
Applications
| Video Line Driver | ADC Input Buffer |
|---|---|
|
Use Scenario: Driving 75-Ω coaxial cable runs in broadcast video distribution systems with NTSC/PAL signals. IC Role / Device Role / Timing Role: Dual-channel voltage buffer providing impedance matching, DC restoration, and gain-of-two amplification for composite video. Use Value: 0.01% differential gain error ensures minimal color shift across 100+ meter cable lengths at 4.43 MHz chroma frequency. |
Use Scenario: Conditioning analog sensor outputs before sampling by high-speed ADCs (e.g., 10–100 MSPS). IC Role / Device Role / Timing Role: Single-supply or dual-supply ADC driver with fast settling (120 ns to 0.1%) and low THD (−75 dBc). Use Value: 165 MHz bandwidth and 400 V/µs slew rate preserve transient integrity for multi-tone or pulse-shaped inputs. |
| Medical Imaging Signal Chain | Test & Measurement Front-End |
|
Use Scenario: Amplifying low-noise ultrasound receive signals prior to digitization in portable imaging systems. IC Role / Device Role / Timing Role: Dual-channel low-distortion gain stage with matched channels for I/Q path processing. Use Value: −64 dB channel crosstalk at 1 MHz prevents interference between parallel signal paths in beamforming architectures. |
Use Scenario: Building modular oscilloscope or spectrum analyzer front-ends requiring wide dynamic range and flat frequency response. IC Role / Device Role / Timing Role: High-Z input buffer and programmable-gain amplifier with 100 mA output capability for driving 50-Ω test fixtures. Use Value: ±13.6 V output swing into 1 kΩ enables full-scale signal generation up to 27 VPP with external gain stages. |
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 |
|---|---|---|---|
| THS4032CDR | 100 MHz bandwidth, lower noise (4.5 nV/√Hz), higher input bias current (20 µA) | Better suited for low-noise preamplifier stages; insufficient bandwidth for >80 MSPS ADC drivers | Select when noise dominates over speed; avoid for video or >100 MHz small-signal applications |
| OPA2691U | 1.5 GHz gain-bandwidth, current-feedback architecture, no unity-gain stability guarantee | Requires careful layout and feedback resistor selection; not drop-in for voltage-feedback designs | Choose only when >500 MHz closed-loop bandwidth is required and layout controls are in place |
Compared with THS4042CDR, THS4032CDR trades bandwidth for lower noise and higher input current, making it preferable in sensor front-ends but inadequate for video; OPA2691U offers vastly higher speed but demands current-feedback design discipline and lacks guaranteed unity-gain stability.
Availability
THS4042CDR is available at Aetrix Electronics and suitable for video distribution systems, high-speed data acquisition, and medical imaging equipment requiring stable component supply across extended production lifecycles.
Supply support for THS4042CDR 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 THS4042CDR belongs to TI's C-stable high-speed op-amp family, engineered specifically for applications demanding robust capacitive-load driving, video-grade fidelity, and unity-gain stability without external compensation.
FAQ
What is the maximum capacitive load the THS4042CDR can drive without oscillation?
The THS4042CDR is internally compensated to remain stable with capacitive loads up to 1000 pF at unity gain. Test data shows <5% overshoot at 1000 pF with a 5-V step response under ±15 V supply. For loads exceeding 1000 pF or demanding zero peaking, a 20 Ω series isolation resistor at the output is recommended - a practice confirmed in TI's SLOA013 application note. This behavior is intrinsic to the THS4042CDR's C-stable architecture.
Does the THS4042CDR support single-supply operation?
Yes, the THS4042CDR supports single-supply operation from 9 V to 32 V (VCC = V+ to GND). Its common-mode input voltage range extends to within 1.2 V of the negative rail and 1.7 V of the positive rail at ±5 V supply, enabling rail-to-rail input capability when biased appropriately. The THS4042CDR datasheet specifies performance metrics under both dual (±5 V, ±15 V) and single-supply conditions, confirming functional operation across both topologies.
What is the thermal performance of the THS4042CDR in SOIC-8 package?
The THS4042CDR in SOIC-8 (D package) has a junction-to-ambient thermal resistance (θJA) of 167°C/W per TI's JEDEC Low-K test board characterization. At TA = 25°C and ±15 V supply, its maximum continuous power dissipation is 740 mW. Derating is required above 25°C ambient; for example, at 70°C ambient, usable power drops to ~450 mW. This thermal profile is documented in the THS4042CDR datasheet Dissipation Rating Table on page 3.
How does the THS4042CDR compare to the THS4041 in terms of pin compatibility and functionality?
The THS4042CDR (dual) and THS4041CDR (single) share identical SOIC-8 pinouts for their respective channel counts: THS4041 uses pins 1–8 as NULL, IN−, IN+, VCC−, VCC+, OUT, NC, NC; THS4042 uses pins 1–8 as NULL, 1IN−, 1IN+, VCC−, VCC+, 1OUT, 2OUT, 2IN−. While pin functions align per channel, THS4042CDR lacks dedicated NULL pins for Channel 2 and has no NC pins - meaning they are not pin-compatible replacements. Both share identical AC/DC specs per channel, but THS4042CDR adds channel-to-channel crosstalk specification (−64 dB).
Is the THS4042CDR suitable for driving 75-Ω video lines directly?
Yes, the THS4042CDR is explicitly characterized for 75-Ω video line driving. Its 100 mA output drive capability, 0.01% differential gain error, and 0.01° differential phase error at ±15 V meet SMPTE 253M and ITU-R BT.470 standards for broadcast video. TI's evaluation module (THS4042EVM) includes 75-Ω termination and source-matching resistor options, confirming direct interface viability - a use case validated in the THS4042CDR datasheet Applications section and Figure 33–36.
THS4042CDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
THS4042CDR FAQ
1.How can I place an order for THS4042CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4042CDR 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 THS4042CDR reliable?
The price and inventory of THS4042CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4042CDR is usually 5 days.
3.What payment methods are accepted for THS4042CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4042CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4042CDR?
THS4042CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4042CDR 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 THS4042CDR?
For technical support, including THS4042CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4042CDR requirements.
6.How does Aetrix verify that THS4042CDR is sourced from the original manufacturer or authorized distributors?
All THS4042CDR 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 THS4042CDR meets industry standards.
7.What is the process for return or replacement of THS4042CDR?
All THS4042CDR units undergo pre-shipment inspection (PSI). If there is an issue with THS4042CDR, 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 THS4042CDR part is unused and in its original packaging.
Return procedure for THS4042CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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