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Texas Instruments THS4502CD
- Part No.:
- THS4502CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4502CD.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,393
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Product details
Overview
THS4502CD from Texas Instruments is a high-performance, fully differential amplifier with power-down capability, designed for precision signal conditioning in high-speed data acquisition systems. It delivers 370 MHz small-signal bandwidth, 2800 V/µs slew rate, and -95 dBc third-order intermodulation distortion at 30 MHz under ±5 V supply - enabling 14-bit ADC preamplification up to 40 MHz.
For engineers reviewing the THS4502CD datasheet, THS4502CD pinout, THS4502CD application, or THS4502CD equivalent, this device is selected for demanding analog front-ends requiring low distortion, wide common-mode input range, output common-mode voltage control (VOCM), and thermal-aware operation below +60°C junction temperature.
Technical Context
The THS4502CD employs a fully differential architecture with centered input common-mode range and independent VOCM input, allowing precise control of output common-mode level without affecting differential gain. Its internal feedback structure supports stable unity-gain operation and maintains balance error better than -58 dB across frequency.
Power-down functionality is implemented via a dedicated PD pin with defined enable/disable thresholds (≥2.1 V ON, ≤0.7 V OFF under 5 V supply), reducing quiescent current to ≤1.2 mA while preserving input impedance and enabling fast turnon/turnoff delays (1000 ns / 800 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 370 MHz at G = +1, ±5 V supply - supports wideband IF/RF signal chain amplification without gain peaking. |
| Slew rate | 2800 V/µs - enables clean reproduction of fast transient signals up to 220 MHz large-signal bandwidth. |
| IMD3 | -95 dBc at 30 MHz, 2 VPP output - ensures minimal spectral regrowth in wireless receiver chains. |
| OIP3 | 52 dBm at 30 MHz - provides high linearity for driving 14-bit ADCs with >80 dB SFDR. |
| Input common-mode range | ±4.0 V (±5 V supply) - accommodates rail-to-rail single-ended inputs while maintaining CMRR ≥70 dB. |
| VOCM control bandwidth | 180 MHz - allows dynamic adjustment of output common-mode level without degrading AC performance. |
| Quiescent current | 23–34 mA (active), ≤1.2 mA (power-down) - balances speed and power efficiency in battery-sensitive or thermally constrained designs. |
Pinout & Package
THS4502CD is packaged in an 8-pin SOIC (D package) with exposed thermal pad (PowerPAD™). The package supports enhanced thermal dissipation and requires PCB thermal plane connection per TI SLMA002 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; accepts single-ended or differential signals with centered common-mode range. |
| VIN+ | Non-inverting input | Differential input node; matched to VIN− for optimal CMRR and harmonic cancellation. |
| VOCM | Output common-mode control | Analog input setting DC offset of differential outputs; high-impedance (25 kΩ || 1 pF) with ±4 V range. |
| VS+ | Positive supply | Accepts +5 V, ±5 V, or +12/+15 V; max rating 16.5 V; requires local 0.1 µF + 10 µF decoupling. |
| VOUT+ | Positive differential output | High-speed, low-impedance (0.1 Ω) output; drives 20 Ω loads up to 120 mA differential current. |
| PD | Power-down enable | Active-high logic input; disables amplifier core while retaining input bias integrity and fast recovery. |
| VS− | Negative supply | Required for dual-supply operation (±5 V); tied to ground for single-supply 5 V mode. |
| VOUT− | Negative differential output | Complementary output to VOUT+; balanced output pair enables rejection of even-order distortion. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and improves PSRR/CMMR by >70 dB over frequency. |
| Centered input common-mode range | Supports ±4 V input swing on ±5 V rails - simplifies interface with DACs, sensors, and mixers without level-shifting. |
| Output common-mode voltage control (VOCM) | Enables precise matching to ADC reference midpoints (e.g., 2.5 V) without external resistive dividers. |
| Power-down capability | Reduces supply current to <1.2 mA while maintaining input bias stability and <1 µs wake-up latency. |
| Wide supply range | Operates from 5 V single supply to ±7.5 V dual supply - suitable for portable and industrial systems. |
Applications
| High-Speed ADC Preamplifier | Wireless Receiver IF Amplifier |
|---|---|
|
Use Scenario: Driving a 14-bit, 80 MSps ADC in a baseband or IF sampling system with 2 VPP full-scale requirement. IC Role / Device Role / Timing Role: Fully differential gain stage that converts single-ended sensor/mixer output to balanced ADC input while rejecting common-mode noise. Use Value: Achieves >80 dB SFDR at 30 MHz due to -95 dBc IMD3 and 52 dBm OIP3, meeting LTE/WiMAX receiver linearity specs. |
Use Scenario: Amplifying downconverted RF signals in cellular infrastructure or test equipment receiver chains. IC Role / Device Role / Timing Role: Low-distortion IF buffer between mixer and programmable gain amplifier or filter network. Use Value: Maintains signal fidelity across 150 MHz bandwidth with <0.1 dB gain flatness up to 150 MHz, minimizing channel compensation complexity. |
| Single-Ended to Differential Converter | Active Differential Line Driver |
|
Use Scenario: Converting legacy single-ended signal sources (e.g., op-amp outputs, DACs) to differential format for noise-immune transmission. IC Role / Device Role / Timing Role: Precision gain block with VOCM control to set output common-mode level matching downstream receivers. Use Value: Delivers <−58 dB output balance error and 2800 V/µs slew rate - preserves edge integrity in high-speed digital interfaces. |
Use Scenario: Driving long PCB traces or cables in high-resolution imaging or industrial DAQ systems where EMI immunity is critical. IC Role / Device Role / Timing Role: High-current differential driver capable of sourcing/sinking 120 mA into 20 Ω loads. Use Value: Sustains ±7.4 V differential swing into 1 kΩ load at ±5 V supply - reduces need for external level-shifting or buffering stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4503CD | No power-down pin; identical AC/DC specs and pinout except NC replaces PD. | Preferred where continuous operation is required and thermal management ensures TJ < 60°C. | Select THS4503CD when power-down functionality is unnecessary and board space allows same SOIC footprint. |
| THS4502ID | Same circuit design but rated for -40°C to +85°C industrial temperature range; higher max quiescent current (32 mA). | Required for outdoor, automotive, or industrial environments exceeding 70°C ambient. | Choose THS4502ID when extended temperature operation is mandatory and thermal derating is applied per oscillation warning. |
Compared with THS4503CD and THS4502ID, the THS4502CD offers unique power-down control in commercial-grade packaging - making it optimal for cost-sensitive, thermally managed instrumentation where intermittent operation reduces average power and die temperature.
Availability
THS4502CD is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, and precision test equipment requiring stable component supply across production lifecycles.
Supply support for THS4502CD 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-speed amplifiers and precision signal chain solutions.
The THS4502CD belongs to TI's high-linearity fully differential amplifier product line, engineered specifically for 14-bit+ data converter interfaces and wideband communication systems demanding ultra-low distortion and robust thermal behavior.
FAQ
What is the maximum junction temperature specification for reliable operation of the THS4502CD?
The THS4502CD must be operated with junction temperature below +60°C to prevent low-level oscillation. This is a hard thermal limit - not a recommended maximum. Designers must use thermal modeling, PCB copper area, and ambient conditions to ensure TJ remains under +60°C during continuous operation. TI explicitly states the device is not recommended for new designs expecting higher die temperatures.
Does the THS4502CD support single-supply operation, and what is the valid VOCM input range in that configuration?
Yes, the THS4502CD supports 5 V single-supply operation with VS− tied to ground. In this mode, the VOCM input range is 1.0 V to 4.0 V (min), enabling precise setting of output common-mode voltage between 1.3 V and 3.7 V. This matches standard 2.5 V ADC references and avoids clipping when driving rail-to-rail inputs.
How does the power-down function of the THS4502CD affect input bias current and output impedance?
In power-down mode, the THS4502CD reduces input bias current to ≤260 µA and maintains high input impedance (50 kΩ || 1 pF), preserving signal integrity at the input nodes. Output impedance rises significantly - the outputs enter high-Z state, eliminating loading effects on downstream circuits while consuming <1.2 mA total supply current.
Can the THS4502CD drive a 50 Ω differential load directly, and what is the resulting output swing?
The THS4502CD is not optimized for direct 50 Ω differential termination. Its specified load is 800 Ω (differential) or 20 Ω (per side, single-ended). Driving 50 Ω differentially would reduce output swing to ~±3.5 V (vs. ±7.4 V into 1 kΩ) and increase distortion. A series resistor or transformer interface is recommended for 50 Ω systems to maintain THS4502CD's specified linearity and bandwidth.
What is the purpose of the PowerPAD™ in the THS4502CD SOIC package, and how must it be implemented on the PCB?
The PowerPAD™ is an exposed thermal pad on the underside of the THS4502CD SOIC package, acting as a primary heat path from die to PCB. It must be soldered to a solid copper thermal plane (minimum 1 in²) with ≥4 thermal vias to inner/ground layers. Failure to connect the PowerPAD™ risks exceeding the +60°C oscillation threshold and permanent reliability degradation, as confirmed in TI's SLMA002 thermal design brief.
THS4502CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 2800V/µs
- Gain Bandwidth Product:
- 300 MHz
- -3db Bandwidth:
- 370 MHz
- Current - Input Bias:
- 4 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 23mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 15 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS4502CD FAQ
1.How can I place an order for THS4502CD through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4502CD 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 THS4502CD reliable?
The price and inventory of THS4502CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4502CD is usually 5 days.
3.What payment methods are accepted for THS4502CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4502CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4502CD?
THS4502CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4502CD 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 THS4502CD?
For technical support, including THS4502CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4502CD requirements.
6.How does Aetrix verify that THS4502CD is sourced from the original manufacturer or authorized distributors?
All THS4502CD 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 THS4502CD meets industry standards.
7.What is the process for return or replacement of THS4502CD?
All THS4502CD units undergo pre-shipment inspection (PSI). If there is an issue with THS4502CD, 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 THS4502CD part is unused and in its original packaging.
Return procedure for THS4502CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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