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Texas Instruments THS4503CDGKR
- Part No.:
- THS4503CDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4503CDGKR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,305
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Product details
Overview
THS4503CDGKR 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 in wireless receiver chains and active filtering applications.
For engineers reviewing the THS4503CDGKR datasheet, THS4503CDGKR pinout, THS4503CDGKR application, or THS4503CDGKR equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional trade-offs for analog front-end design.
Technical Context
The THS4503CDGKR implements a fully differential architecture with centered input common-mode range (±4 V at ±5 V supply) and independent output common-mode voltage control via VOCM pin. Its high open-loop gain (55 dB) and low input bias current (4 µA max) support stable closed-loop operation with precise DC-coupled gain configurations.
It operates across dual supplies (±5 V to ±7.5 V) or single supply (4.5–15 V), with differential output swing of ±8 V into 1 kΩ and 120 mA output drive capability. Unlike the THS4502, it lacks power-down functionality - simplifying biasing but eliminating standby current reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 370 MHz at G = +1, ±5 V supply - supports wideband IF sampling and baseband signal conditioning without gain-bandwidth compromise. |
| Slew rate | 2800 V/µs - enables clean 2 VPP step response with 0.8 ns rise time, critical for fast-settling ADC driver stages. |
| IMD3 | -95 dBc at 30 MHz, 2 VPP output - ensures minimal spectral regrowth in 3G/4G receiver I/Q paths. |
| OIP3 | 51 dBm at 30 MHz - confirms high linearity for RF signal chain applications requiring >70 dB SFDR. |
| Input voltage noise | 6.8 nV/√Hz above 1 MHz - maintains SNR integrity when driving high-resolution ADCs like 14-bit/80 MSPS converters. |
| Quiescent current | 23–34 mA over temperature - balances performance and thermal load in compact MSOP-8 PowerPAD packages. |
| Common-mode rejection ratio | 80 dB minimum - suppresses coupled noise in mixed-signal PCB layouts with shared ground references. |
Pinout & Package
The THS4503CDGKR is housed in an 8-pin MSOP PowerPAD™ package (DGK suffix), featuring thermal enhancement via exposed die paddle connected to PCB ground plane for improved thermal dissipation.
| 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 impedance to VIN− for optimal CMRR and balance. |
| VOCM | Output common-mode voltage control | DC-biases differential outputs to user-defined level (e.g., 2.5 V for 5 V ADC reference); 25 kΩ input impedance. |
| VS+ | Positive supply | Accepts +5 V to +15 V (single) or +5 V to +7.5 V (dual); requires local 0.1 µF + 10 µF decoupling. |
| VOUT+ | Positive differential output | Delivers amplified, phase-inverted signal relative to VOUT−; drives 50 Ω or 800 Ω loads directly. |
| VS− | Negative supply | Accepts −5 V to −7.5 V (dual supply only); must be referenced to system ground for single-supply operation. |
| VOUT− | Negative differential output | Delivers complementary amplified signal; paired with VOUT+ for balanced transmission to ADC or filter stage. |
| NC | No connect | Pin 6 is internally unconnected (not PD as in THS4502); must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and improves PSRR/CMMR vs single-ended amplifiers - essential for high-SFDR data converters. |
| Centered input common-mode range | ±4.0 V at ±5 V supply - allows direct interface to bipolar sensors or DAC outputs without level-shifting circuitry. |
| Output common-mode control (VOCM) | Enables precise alignment of differential output midpoint to ADC reference voltage (e.g., 2.5 V), reducing offset-induced errors. |
| Wide supply voltage range | Operates from ±5 V to ±7.5 V or 4.5–15 V single supply - supports legacy ±5 V systems and modern low-voltage/high-voltage designs. |
| MSOP-8 PowerPAD™ package | Thermally enhanced 3 mm × 3 mm footprint with exposed paddle - reduces θJA to 260°C/W, enabling sustained 370 MHz operation. |
Applications
| High-Linearity ADC Preamplifier | Wireless Receiver I/Q Chain |
|---|---|
Use Scenario: Driving a 14-bit, 80 MSPS analog-to-digital converter in a software-defined radio front end. IC Role / Device Role / Timing Role: Fully differential ADC driver with gain = +1 configuration and VOCM set to 2.5 V. Use Value: Achieves -95 dBc IMD3 at 30 MHz, preserving ENOB > 13.5 bits across 40 MHz bandwidth without external filtering. |
Use Scenario: Amplifying downconverted I and Q baseband signals in LTE femtocell receivers. IC Role / Device Role / Timing Role: Single-ended-to-differential conversion stage with matched gain/phase between I and Q paths. Use Value: Output balance error < -58 dB ensures < 0.1° phase mismatch, minimizing image rejection degradation in quadrature demodulation. |
| Active Differential Filtering | High-Speed Line Driver |
Use Scenario: Implementing a 2nd-order active bandpass filter for ECG signal conditioning with DC-coupled inputs. IC Role / Device Role / Timing Role: Dual-opamp topology using THS4503CDGKR as both integrator and summing node in state-variable filter. Use Value: 370 MHz GBW and 2800 V/µs slew rate enable stable 100 kHz filter response with < 0.01% THD+N at 5 VPP output. |
Use Scenario: Transmitting differential video signals over 10 m coaxial cable in broadcast equipment. IC Role / Device Role / Timing Role: High-current differential line driver with 120 mA output capability into 50 Ω loads. Use Value: ±8 V differential swing into 1 kΩ and 0.1 Ω closed-loop output impedance ensure minimal amplitude loss and reflection-free transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4502CDGKR | Includes power-down pin (PD); quiescent current drops to ≤1.2 mA in shutdown; otherwise identical AC/DC specs. | Required where dynamic power management is needed (e.g., battery-powered portable test equipment). | Select THS4502CDGKR only if explicit power-down control is required; THS4503CDGKR offers simpler biasing and lower risk of unintended shutdown. |
| THS4521RGTR | Lower bandwidth (1.6 GHz), higher slew rate (5500 V/µs), but reduced OIP3 (42 dBm at 30 MHz) and no VOCM pin. | Suitable for ultra-high-speed pulse amplification but not for precision ADC driving requiring adjustable common-mode output. | Choose THS4521RGTR for >500 MHz transient applications; THS4503CDGKR remains preferred for 14-bit ADC interfaces demanding VOCM control and proven IMD3 performance. |
Compared with THS4502CDGKR and THS4521RGTR, the THS4503CDGKR uniquely balances 370 MHz bandwidth, -95 dBc IMD3, and programmable VOCM - making it the optimal choice for fixed-gain, high-linearity ADC driver designs where power-down is unnecessary and common-mode alignment is critical.
Availability
THS4503CDGKR is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, medical imaging, and industrial instrumentation requiring stable component supply and guaranteed long-term manufacturability.
Supply support for THS4503CDGKR 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 amplifier design and manufacturing.
The THS4503CDGKR belongs to TI's high-speed fully differential amplifier product line, engineered specifically for precision signal conditioning in data converter interfaces and RF receiver chains where linearity, bandwidth, and common-mode control are paramount.
FAQ
What is the maximum junction temperature limit to prevent oscillation in the THS4503CDGKR?
The THS4503CDGKR must not exceed +60°C junction temperature during continuous operation to avoid low-level oscillation. This constraint is explicitly stated in the datasheet's "Maximum Die Temperature to Prevent Oscillation" section. Thermal design must ensure θJA and board copper area keep TJ ≤ 60°C under worst-case load and ambient conditions - especially critical in MSOP-8 PowerPAD™ packages operating near full bandwidth.
Does the THS4503CDGKR support single-supply operation, and what is its minimum single-supply voltage?
Yes, the THS4503CDGKR supports single-supply operation from 4.5 V to 15 V. At 5 V supply, it delivers 320 MHz small-signal bandwidth and 1300 V/µs slew rate while maintaining -74 dBc 3rd-harmonic distortion at 30 MHz. The input common-mode range is 1.0 V to 4.0 V, and VOCM can be set to 2.5 V to center outputs for standard 5 V ADC interfaces.
How does the VOCM pin function in the THS4503CDGKR, and what happens if left unconnected?
When the VOCM pin is left floating, the THS4503CDGKR defaults to approximately 2.5 V output common-mode voltage under 5 V supply. Its input impedance is 25 kΩ || 1 pF, and it accepts DC voltages from 1.0 V to 4.0 V to precisely set the differential output midpoint - critical for matching ADC reference levels. Leaving VOCM unconnected is acceptable only if 2.5 V alignment is desired and load conditions maintain stability.
What is the differential output voltage swing specification for the THS4503CDGKR at ±5 V supply?
At ±5 V supply, the THS4503CDGKR delivers a minimum differential output voltage swing of ±8 V into a 1 kΩ load, with typical performance sustaining ±7.6 V over 0°C to 70°C. This swing is referenced to the VOCM voltage and enables full-scale drive of high-performance ADCs such as the ADS4149 without external level-shifting circuitry.
Is the THS4503CDGKR pin-compatible with the THS4502CDGKR, and what is the key functional difference?
The THS4503CDGKR and THS4502CDGKR share identical pinout and package (MSOP-8 DGK), but Pin 6 is NC on THS4503CDGKR versus PD (power-down) on THS4502CDGKR. This means THS4503CDGKR has no power-down capability - eliminating potential failure modes from stray logic signals on PD but removing dynamic power control. Layouts designed for THS4502CDGKR can use THS4503CDGKR only if PD is tied to VS+ or removed from control logic.
THS4503CDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-VSSOP
THS4503CDGKR FAQ
1.How can I place an order for THS4503CDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4503CDGKR 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 THS4503CDGKR reliable?
The price and inventory of THS4503CDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4503CDGKR is usually 5 days.
3.What payment methods are accepted for THS4503CDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4503CDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4503CDGKR?
THS4503CDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4503CDGKR 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 THS4503CDGKR?
For technical support, including THS4503CDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4503CDGKR requirements.
6.How does Aetrix verify that THS4503CDGKR is sourced from the original manufacturer or authorized distributors?
All THS4503CDGKR 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 THS4503CDGKR meets industry standards.
7.What is the process for return or replacement of THS4503CDGKR?
All THS4503CDGKR units undergo pre-shipment inspection (PSI). If there is an issue with THS4503CDGKR, 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 THS4503CDGKR part is unused and in its original packaging.
Return procedure for THS4503CDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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