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Texas Instruments THS4503IDGK
- Part No.:
- THS4503IDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4503IDGK.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,359
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Product details
Overview
THS4503IDGK from Texas Instruments is a high-performance fully differential amplifier optimized 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 - enabling 14-bit ADC preamplification up to 40 MHz with centered input common-mode range and output common-mode voltage control (VOCM). Its MSOP-8 PowerPAD™ package supports thermal management in compact layouts.
For engineers reviewing the THS4503IDGK datasheet, THS4503IDGK pinout, THS4503IDGK application, or THS4503IDGK equivalent, key selection criteria include differential linearity (OIP3 = 51 dBm), VOCM-controlled output swing, ±5 V / 5 V supply flexibility, and junction temperature derating below +60°C to prevent low-level oscillation - critical for wireless receiver chains and active filtering designs.
Technical Context
The THS4503IDGK implements a fully differential architecture with symmetrical input and output stages, supporting both single-ended-to-differential and differential-to-differential conversion. Its centered input common-mode range (±3.4 V at ±5 V supply) and VOCM terminal enable precise DC-coupled gain staging without level-shifting circuitry.
Unlike the THS4502IDGK, this variant omits power-down functionality (PD pin is NC), simplifying biasing while maintaining identical AC performance, noise floor (6.8 nV/√Hz), and output drive capability (±7.4 V swing into 1 kΩ at ±5 V). Thermal design must prioritize die temperature control per TI's maximum 60°C oscillation threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 370 MHz at G = +1, ±5 V supply - enables wideband RF/IF signal amplification without gain peaking. |
| Slew rate | 2800 V/µs - supports fast transient response for high-resolution ADC sampling at >80 MSPS. |
| Third-order IMD | -95 dBc at 30 MHz, 2 VPP - ensures minimal spectral regrowth in communication receiver front-ends. |
| OIP3 | 51 dBm at 30 MHz - confirms robust linearity for demanding analog signal chains. |
| Input voltage noise | 6.8 nV/√Hz above 1 MHz - preserves SNR in low-noise preamplifier stages. |
| VOCM bandwidth | 180 MHz - allows dynamic common-mode adjustment without degrading signal integrity. |
| Quiescent current | 34 mA max at ±5 V, -40°C to +85°C - defines thermal load for PCB layout and heatsinking. |
Pinout & Package
The THS4503IDGK is housed in an 8-pin MSOP PowerPAD™ (DGK) package with exposed thermal pad on underside, requiring solder connection to PCB ground plane for optimal thermal dissipation and ac performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; requires matched trace length and impedance to VIN+ for CMRR optimization. |
| VIN+ | Non-inverting input | Differential input node; symmetric routing essential to preserve balance and harmonic suppression. |
| VOCM | Output common-mode control | DC voltage sets output common-mode level; drives internal feedback to maintain VOUT+/VOUT− symmetry. |
| VS+ | Positive supply | Accepts +5 V single supply or +5 V/+7.5 V dual supply; decoupling required within 5 mm of pin. |
| VOUT+ | Positive differential output | High-impedance, low-distortion output; typically terminated into 100 Ω differential or 50 Ω single-ended loads. |
| VS− | Negative supply | Required for ±5 V operation; connects to -5 V or GND for single-supply mode (5 V). |
| VOUT− | Negative differential output | Complementary to VOUT+; balanced output pair enables rejection of even-order harmonics. |
| NC | No connect | Pin 5 is unconnected (not PD); must remain floating or grounded - no external connection permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates need for external baluns or transformers in ADC driver applications, reducing board area and insertion loss. |
| Centered input common-mode range | ±3.4 V at ±5 V supply enables direct interface to op-amp-based signal sources without level-shifting networks. |
| Output common-mode voltage control (VOCM) | Allows precise alignment of differential output to ADC reference mid-point (e.g., 2.5 V), minimizing offset errors. |
| Wide supply range | Operates from ±5 V to ±7.5 V or 4.5 V to 15 V single supply - supports legacy and modern mixed-signal systems. |
| Low harmonic distortion | -78 dBc 3rd harmonic at 30 MHz ensures clean spectral content for LTE/WiFi baseband processing. |
Applications
| High-Linearity ADC Preamplifier | Wireless Communication Receiver Chain |
|---|---|
Use Scenario: Driving a 14-bit, 80 MSPS ADC in a software-defined radio front-end. IC Role / Device Role / Timing Role: Differential signal conditioner that converts single-ended IF signals to matched differential outputs synchronized to ADC clock domain. Use Value: -95 dBc IMD3 and 370 MHz bandwidth preserve ENOB across full Nyquist band, enabling direct sampling of 30 MHz carriers. |
Use Scenario: Baseband I/Q channel amplification in LTE femtocell receivers. IC Role / Device Role / Timing Role: Low-noise, high-linearity gain block between mixer and ADC, maintaining phase coherence across I/Q paths. Use Value: VOCM control aligns output common-mode to 2.5 V reference, eliminating DC offset accumulation in successive gain stages. |
| Single-Ended to Differential Conversion | Active Filtering of Differential Signals |
Use Scenario: Converting output of a single-ended DAC to differential format for driving balanced transmission lines. IC Role / Device Role / Timing Role: Precision gain stage with unity-gain configuration and VOCM set to mid-supply for rail-to-rail swing. Use Value: Centered input common-mode range accepts DAC output directly (0–5 V), avoiding external bias resistors or op-amp level shifters. |
Use Scenario: Implementing a 2nd-order differential active filter in medical imaging signal chain. IC Role / Device Role / Timing Role: High-speed filter amplifier with matched differential outputs feeding downstream instrumentation amplifier. Use Value: 2800 V/µs slew rate supports fast step response in pulse-echo timing circuits, while low noise preserves weak echo signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4502IDGK | Includes power-down pin (PD); otherwise identical AC/DC specs and pinout except PD replaces NC. | Required where system-level power gating is needed; adds complexity in biasing and timing (800 ns turnoff delay). | Select THS4502IDGK only if dynamic power cycling is mandatory; THS4503IDGK reduces BOM count and layout risk. |
| THS4503CDGK | Same silicon, but rated for 0°C to +70°C ambient (C-suffix) vs. -40°C to +85°C (I-suffix) for THS4503IDGK. | Not suitable for industrial or automotive environments requiring extended temperature operation. | Choose THS4503IDGK for reliability in harsh thermal environments; THS4503CDGK is cost-optimized for commercial-grade equipment. |
Compared with THS4502IDGK, THS4503IDGK removes power-down complexity while retaining full signal-chain performance; versus THS4503CDGK, it guarantees operation across industrial temperature extremes - making it the preferred choice for embedded systems requiring long-term stability and thermal resilience.
Availability
THS4503IDGK is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, and precision test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS4503IDGK 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 amplifier design and manufacturing.
The THS4503IDGK belongs to TI's high-performance fully differential amplifier product line, engineered specifically for ultra-linear signal conditioning in ADC driver, communications, and instrumentation applications demanding sub-0.1% distortion and GHz-class settling.
FAQ
What is the maximum junction temperature for reliable operation of the THS4503IDGK?
The THS4503IDGK must be operated with junction temperature ≤ +60°C to prevent low-level oscillation. This is a hard thermal limit - not a recommended maximum. Derate quiescent current and ensure adequate PCB copper area under the PowerPAD™, especially at elevated ambient temperatures. TI specifies 125°C as maximum continuous-reliability junction temperature, but oscillation begins below that threshold.
Does the THS4503IDGK support single-supply operation?
Yes, the THS4503IDGK operates from a single 5 V supply (4.5 V to 15 V range). In this mode, VS− connects to ground, VOCM sets output common-mode (typically 2.5 V), and input common-mode range shifts to 1.3 V to 3.7 V. Performance metrics like bandwidth and IMD remain specified and validated under 5 V conditions per the datasheet.
What is the function of Pin 5 (labeled NC) on the THS4503IDGK?
Pin 5 on the THS4503IDGK is a no-connect terminal - physically unconnected internally. It must not be tied to any voltage or ground. This distinguishes it from the THS4502IDGK, where Pin 5 is the power-down (PD) control input. Using THS4503IDGK in a layout designed for THS4502IDGK requires leaving Pin 5 floating.
How does VOCM control affect THS4503IDGK output balance and distortion?
VOCM directly sets the average DC level of VOUT+ and VOUT−. When VOCM is stable and well-decoupled, output balance error remains ≤ -58 dB across frequency, preserving harmonic cancellation. Deviations in VOCM voltage cause common-mode shifts that degrade even-order distortion rejection - so low-impedance, low-noise VOCM drive is essential for best OIP3 and HD2 performance.
Can the THS4503IDGK drive a 50 Ω single-ended load directly?
Yes, but with trade-offs: the THS4503IDGK can drive one side of a 50 Ω load referenced to VOCM (e.g., VOUT+ to 50 Ω to VOCM), achieving ~100 mA output current. However, full differential termination into 100 Ω provides optimal linearity and balance. Single-ended use reduces effective output swing and increases even-harmonic distortion due to asymmetry.
THS4503IDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 120 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 15 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
THS4503IDGK FAQ
1.How can I place an order for THS4503IDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4503IDGK 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 THS4503IDGK reliable?
The price and inventory of THS4503IDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4503IDGK is usually 5 days.
3.What payment methods are accepted for THS4503IDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4503IDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4503IDGK?
THS4503IDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4503IDGK 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 THS4503IDGK?
For technical support, including THS4503IDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4503IDGK requirements.
6.How does Aetrix verify that THS4503IDGK is sourced from the original manufacturer or authorized distributors?
All THS4503IDGK 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 THS4503IDGK meets industry standards.
7.What is the process for return or replacement of THS4503IDGK?
All THS4503IDGK units undergo pre-shipment inspection (PSI). If there is an issue with THS4503IDGK, 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 THS4503IDGK part is unused and in its original packaging.
Return procedure for THS4503IDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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