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Texas Instruments THS4503IDGKR
- Part No.:
- THS4503IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4503IDGKR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,491
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Product details
Overview
THS4503IDGKR 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 8-pin MSOP PowerPAD™ package supports thermal management in compact layouts.
For engineers reviewing the THS4503IDGKR datasheet, THS4503IDGKR pinout, THS4503IDGKR application, or THS4503IDGKR equivalent, key selection criteria include differential linearity (OIP3 = 51 dBm), VOCM-controlled output swing, ±5 V / 5 V single/dual supply operation, and junction temperature derating below +60°C to prevent low-level oscillation.
Technical Context
The THS4503IDGKR 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 independent VOCM terminal enable precise DC-coupled gain staging into high-resolution ADCs.
Unlike the THS4502, the THS4503IDGKR omits power-down functionality - simplifying biasing and eliminating PD pin routing. Its internal feedback network maintains stable unity-gain operation with 0.1 dB flatness to 150 MHz and settling time of 6.3 ns to 0.1% for 4 VPP steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 370 MHz at G = +1, ±5 V supply - supports wideband RF/IF signal chain amplification without gain peaking. |
| Slew rate | 2800 V/µs - enables full-scale transient response for 14-bit, 80 MSPS ADC drivers without slewing-induced distortion. |
| Third-order IMD | -95 dBc at 30 MHz, 2 VPP - ensures minimal spectral regrowth in wireless receiver I/Q paths. |
| OIP3 | 51 dBm at 30 MHz - confirms high linearity for demanding analog front-end applications requiring >70 dB SFDR. |
| Input common-mode range | ±3.4 V (min) at ±5 V supply - allows direct interfacing with op-amp-based anti-alias filters and DAC outputs. |
| VOCM control bandwidth | 180 MHz - permits fast common-mode level adjustment during dynamic range scaling in multi-channel systems. |
| Quiescent current | 32 mA max at -40°C to +85°C - balances performance and power in thermally constrained industrial modules. |
Pinout & Package
The THS4503IDGKR is housed in an 8-pin MSOP PowerPAD™ (DGK) package with exposed thermal pad on underside for enhanced heat dissipation. The PowerPAD must be soldered to a PCB thermal plane per TI SLMA002 guidelines to maintain junction temperature ≤60°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; requires matched trace length and impedance to VIN+ for optimal CMRR. |
| VIN+ | Non-inverting input | Differential input node; referenced to VOCM for centered common-mode operation. |
| VOCM | Output common-mode voltage control | Analog input setting DC offset of differential output pair; drives internal summing node with 25 kΩ || 1 pF impedance. |
| VS+ | Positive supply rail | Accepts +5 V (single) or +5 V to +7.5 V (dual); decoupling with 0.1 µF + 10 µF required per datasheet Figure 1. |
| VOUT+ | Positive differential output | High-impedance, low-distortion output; drives 50 Ω or 800 Ω loads directly with ±7.4 V swing (RL = 1 kΩ). |
| VS− | Negative supply rail | Accepts 0 V (single) or −5 V to −7.5 V (dual); must be decoupled identically to VS+. |
| VOUT− | Negative differential output | Complementary output to VOUT+; balance error <−58 dB ensures <0.1% amplitude/phase mismatch at 100 kHz. |
| NC | No connect | Pin 6 is unconnected in THS4503 (vs. PD in THS4502); must remain floating or grounded per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and doubles effective SNR vs. single-ended amplifiers in ADC driver applications. |
| Centered input common-mode range | Supports rail-to-rail input signals across ±3.4 V at ±5 V supply - enables direct connection to DACs and sensor interfaces. |
| Output common-mode voltage control (VOCM) | Allows precise alignment of differential output DC level to ADC reference mid-point (e.g., 2.5 V), reducing AC coupling requirements. |
| Wide supply voltage range | Operates from 4.5 V to 15 V single supply or ±5 V to ±7.5 V dual supply - simplifies integration into mixed-voltage systems. |
| Low harmonic distortion | −78 dBc 3rd harmonic at 30 MHz ensures clean spectral purity for LTE/WiFi baseband I/Q processing. |
Applications
| High Linearity ADC Preamplifier | Wireless Communication Receiver Chain |
|---|---|
|
Use Scenario: Driving a 14-bit, 80 MSPS pipeline ADC in medical ultrasound beamforming. IC Role / Device Role / Timing Role: Fully differential gain stage converting single-ended transducer signals to matched differential inputs while rejecting common-mode noise. Use Value: −95 dBc IMD3 at 30 MHz preserves dynamic range across 20–40 MHz imaging bands, enabling >74 dB SFDR. |
Use Scenario: I/Q baseband amplification in a 4G LTE femtocell receiver. IC Role / Device Role / Timing Role: Differential line driver between quadrature demodulator and ADC, maintaining phase/gain matching across I and Q paths. Use Value: <−58 dB output balance error ensures <0.1° phase mismatch, minimizing image rejection degradation. |
| Single-Ended to Differential Conversion | Active Filtering of Differential Signals |
|
Use Scenario: Converting output of a single-ended DAC to differential format for high-speed DAC buffer stage. IC Role / Device Role / Timing Role: Precision gain block with VOCM-adjustable output common-mode level matching downstream ADC reference. Use Value: 0.98–1.02 VOCM gain accuracy over temperature ensures stable DC offset alignment without calibration. |
Use Scenario: Implementing a 2nd-order active bandpass filter for ECG signal conditioning in portable diagnostics. IC Role / Device Role / Timing Role: Differential op-amp core in Sallen-Key topology, rejecting power supply ripple via high PSRR (70 dB min). Use Value: 80 dB CMRR minimizes electrode motion artifact coupling, improving baseline stability in low-frequency biopotential measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4502IDGKR | Includes power-down pin (PD); otherwise identical AC/DC specs and pinout except NC → PD mapping. | Required where system-level power gating is needed; adds 800 ns turnoff delay and 1.2 mA max power-down current. | Select THS4502IDGKR only if dynamic power cycling is mandatory; THS4503IDGKR offers simpler biasing and lower standby risk. |
| THS4521RGTR | Lower bandwidth (1.8 GHz GBW), higher quiescent current (40 mA), no VOCM pin - uses fixed internal common-mode reference. | Suited for ultra-high-speed (>100 MHz) applications where VOCM control is unnecessary and board space permits larger QFN package. | Choose THS4521RGTR for >100 MHz closed-loop gain ≥2 designs; THS4503IDGKR remains optimal for VOCM-flexible, thermally sensitive 30–40 MHz systems. |
Compared with THS4502IDGKR and THS4521RGTR, the THS4503IDGKR uniquely balances VOCM programmability, thermal safety margin (<60°C TJ limit), and MSOP footprint - making it the preferred choice for cost-sensitive, high-linearity ADC interface designs operating up to 40 MHz.
Availability
THS4503IDGKR is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure, medical imaging, and test equipment requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for THS4503IDGKR 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 THS4503IDGKR belongs to TI's high-linearity fully differential amplifier product line, engineered specifically for precision ADC driving, I/Q signal conditioning, and wideband analog front-ends in communications and instrumentation.
FAQ
What is the maximum junction temperature specification for reliable operation of the THS4503IDGKR?
The THS4503IDGKR must not exceed +60°C junction temperature during continuous operation to prevent low-level oscillation, as documented in the "Maximum Die Temperature to Prevent Oscillation" section of the datasheet. This is a hard reliability limit - not a recommended maximum. Thermal design must ensure TJ ≤60°C under worst-case ambient, power dissipation, and PCB copper area conditions using the θJA = 260°C/W rating for the DGK package.
Does the THS4503IDGKR support single-supply operation, and what is the minimum supply voltage?
Yes, the THS4503IDGKR supports true 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. Input common-mode range is 1.6 V to 3.4 V (min), and differential output swing is ±2.6 V into 1 kΩ - enabling direct interfacing with 2.5 V-referenced ADCs when VOCM is set to 2.5 V.
How does the VOCM pin function in the THS4503IDGKR, and what happens if it is left unconnected?
The VOCM pin sets the DC common-mode level of the differential output pair. When left floating, the THS4503IDGKR defaults to 2.5 V ±0.1 V (at 5 V supply) due to internal biasing. However, TI recommends actively driving VOCM with a low-impedance source (≤1 kΩ) for stable operation - especially in noisy environments - since its input impedance is only 25 kΩ || 1 pF and floating nodes may induce drift or instability.
What is the difference between THS4503IDGKR and THS4502IDGKR beyond the power-down pin?
Functionally identical in all AC/DC specifications, package, and pinout except Pin 6: THS4503IDGKR has NC (no connect), while THS4502IDGKR uses it as PD (power-down). No electrical or thermal differences exist between the two devices outside power-down behavior. THS4503IDGKR eliminates PD-related timing delays, leakage paths, and layout complexity - making it preferable for always-on, thermally critical applications.
Can the THS4503IDGKR drive a 50 Ω differential load directly, and what is the maximum output current?
Yes, the THS4503IDGKR can drive a 50 Ω differential load (25 Ω per side) with guaranteed 100 mA minimum output current per output (sink/source) at −40°C to +85°C. At ±5 V supply, it delivers ±7.4 V differential swing into 1 kΩ, scaling to ±3.5 V into 50 Ω - sufficient for most high-speed ADC inputs and RF mixer interfaces without external buffering.
THS4503IDGKR 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
THS4503IDGKR FAQ
1.How can I place an order for THS4503IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4503IDGKR 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 THS4503IDGKR reliable?
The price and inventory of THS4503IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4503IDGKR is usually 5 days.
3.What payment methods are accepted for THS4503IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4503IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4503IDGKR?
THS4503IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4503IDGKR 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 THS4503IDGKR?
For technical support, including THS4503IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4503IDGKR requirements.
6.How does Aetrix verify that THS4503IDGKR is sourced from the original manufacturer or authorized distributors?
All THS4503IDGKR 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 THS4503IDGKR meets industry standards.
7.What is the process for return or replacement of THS4503IDGKR?
All THS4503IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with THS4503IDGKR, 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 THS4503IDGKR part is unused and in its original packaging.
Return procedure for THS4503IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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