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Texas Instruments THS4503IDGN
- Part No.:
- THS4503IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4503IDGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:327
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Product details
Overview
THS4503IDGN 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 under ±5 V supply - enabling 14-bit ADC preamplification up to 40 MHz in wireless receiver chains and active filtering applications.
For engineers reviewing the THS4503IDGN datasheet, THS4503IDGN pinout, THS4503IDGN application, or THS4503IDGN equivalent, key selection criteria include its centered input common-mode range (±3.4 V at –40°C to +85°C), output common-mode voltage control (VOCM), absence of power-down functionality (distinguishing it from THS4502), and MSOP-8 PowerPAD™ package thermal performance.
Technical Context
The THS4503IDGN employs a fully differential architecture with symmetrical input and output stages, supporting both single-ended-to-differential and differential-to-differential conversion. Its open-loop gain exceeds 50 dB across temperature, and common-mode rejection ratio remains ≥70 dB up to 100 kHz, ensuring robust noise immunity in mixed-signal front-ends.
It features dedicated VOCM terminal for precise output common-mode level setting (2.5 V default when floating), independent of gain configuration. The device operates from ±5 V, ±7.5 V, or single 5–15 V supplies, with quiescent current ranging from 12 mA (min) to 31 mA (max) over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 370 MHz at G = +1, ±5 V - supports wideband IF sampling and baseband signal chain bandwidths beyond 100 MHz. |
| Slew rate | 2800 V/µs at ±5 V - enables clean 2 VPP step response with ≤0.8 ns rise time, critical for fast-settling ADC drivers. |
| IMD3 | –95 dBc at 30 MHz, 2 VPP, 200 kHz tone spacing - meets linearity requirements for 14-bit, 80 MSPS ADC interfaces. |
| OIP3 | 51 dBm at 30 MHz, referenced to 50 Ω - confirms high dynamic range in RF receiver I/Q paths. |
| Input common-mode range | ±3.4 V (min) at –40°C to +85°C - allows direct interfacing with ±3.3 V or 5 V logic without level-shifting. |
| Quiescent current | 20–31 mA over temperature - balances power efficiency and high-speed performance in thermally constrained layouts. |
| Output swing | ±7.4 V (min) differential into 1 kΩ at ±5 V - provides >14.8 VPP headroom for driving ADC inputs with margin. |
Pinout & Package
The THS4503IDGN is housed in an 8-pin MSOP PowerPAD™ package (DGN), featuring exposed thermal pad on underside for enhanced thermal dissipation. Pin 1 is VIN–; pin 2 is VIN+; pin 3 is VOCM; pin 4 is VS+; pin 5 is VOUT+; pin 6 is VS–; pin 7 is VOUT–; pin 8 is NC (no connect, not internally bonded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN– | Inverting input | Differential input node; accepts centered common-mode voltage (e.g., 0 V with ±5 V supplies). |
| VIN+ | Non-inverting input | Differential input node; matched impedance and offset to VIN– for optimal CMRR. |
| VOCM | Output common-mode control | Directly sets DC level of differential outputs (VOUT+ and VOUT–); floats to 2.5 V by default. |
| VS+ | Positive supply | Accepts +5 V, +12 V, or +15 V in single-supply mode; or +5 V/+7.5 V in dual-supply mode. |
| VOUT+ | Positive differential output | Delivers amplified, phase-aligned signal relative to VOUT–; requires matched termination for balance. |
| VS– | Negative supply | Required for dual-supply operation (e.g., –5 V); tied to GND in single-supply configurations. |
| VOUT– | Negative differential output | Complementary output to VOUT+; differential swing defined as VOUT+ – VOUT–. |
| NC | No connect | Unbonded pin; must be left unconnected per TI design guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and improves PSRR/CMMR vs single-ended amplifiers - essential for high-fidelity ADC interface. |
| Centered input common-mode range | Supports rail-to-rail input swing around midsupply (e.g., 0 V with ±5 V), simplifying sensor or DAC interfacing without external biasing. |
| Output common-mode voltage control (VOCM) | Enables precise alignment of differential output DC level to ADC reference (e.g., 2.5 V), reducing offset-induced errors. |
| Wide supply range | Operates from ±5 V to ±7.5 V or 5 V to 15 V single supply - accommodates legacy and low-voltage system designs. |
| MSOP-8 PowerPAD™ package | θJA = 58.4°C/W enables stable operation at full speed up to +85°C ambient without forced airflow. |
Applications
| High-Speed ADC Preamplifier | Wireless Receiver I/Q Demodulator |
|---|---|
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 amplifier providing gain, common-mode level shifting, and harmonic suppression before digitization. Use Value: –95 dBc IMD3 at 30 MHz ensures spurious-free dynamic range >80 dB, preserving ENOB across Nyquist band. |
Use Scenario: Converting single-ended I and Q baseband signals from quadrature demodulators into balanced differential pairs for ADC input. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with matched gain and phase across I/Q paths. Use Value: Output balance error <–58 dB maintains I/Q amplitude/phase matching, minimizing image rejection degradation. |
| Active Differential Filter Stage | High-Fidelity Signal Chain Driver |
Use Scenario: Implementing a 4th-order Butterworth anti-aliasing filter between RF mixer and ADC in LTE femtocell baseband. IC Role / Device Role / Timing Role: High-linearity active filter element with programmable common-mode output level. Use Value: 370 MHz bandwidth supports filter cutoffs up to 100 MHz while maintaining flat group delay and low passband ripple. |
Use Scenario: Conditioning output from a precision DAC in test equipment requiring low distortion and wide dynamic range. IC Role / Device Role / Timing Role: Precision buffer and level shifter delivering differential output with minimal added noise (6.8 nV/√Hz). Use Value: Input voltage noise of 6.8 nV/√Hz and 52 dB open-loop gain preserve SNR in 16-bit DAC reconstruction paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4502IDGN | Identical pinout and AC specs, but includes power-down pin (PD) and higher quiescent current in active mode (up to 34 mA). | Required where system-level power gating is needed; unsuitable if PD pin routing is unavailable or unused. | Select THS4502IDGN only when dynamic power management is mandatory; THS4503IDGN offers lower static power and simpler layout. |
| THS4521IRGTR | Higher bandwidth (1.5 GHz), lower noise (2.1 nV/√Hz), but narrower input common-mode range (0.3 V to VS – 0.3 V) and no VOCM pin. | Better suited for DC-coupled, high-frequency (>200 MHz) applications where VOCM control is unnecessary. | Choose THS4521IRGTR for >100 MHz signal chains with tight noise budgets; THS4503IDGN remains preferred for VOCM-flexible, wide common-mode ADC interfaces. |
Compared with THS4502IDGN, THS4503IDGN eliminates power-down complexity and reduces quiescent current by ~10%, improving thermal stability in dense layouts; versus THS4521IRGTR, it trades bandwidth and noise for VOCM control and robust common-mode input range - making it optimal for precision ADC driver roles.
Availability
THS4503IDGN is available at Aetrix Electronics and suitable for high-speed data acquisition, wireless infrastructure transceivers, and precision instrumentation requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for THS4503IDGN 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 THS4503 forms part of TI's high-linearity, fully differential amplifier product line, engineered specifically for demanding ADC driver, I/Q signal conditioning, and wideband active filter applications in communications and test equipment.
FAQ
What is the maximum junction temperature limit for reliable operation of the THS4503IDGN?
The THS4503IDGN must not exceed +60°C junction temperature to prevent low-level oscillation, as specified in TI's Application Information section. Continuous operation above this threshold is not recommended. Thermal design must ensure θJA = 58.4°C/W and adequate PCB copper area under the PowerPAD™ to maintain TJ ≤ 60°C at full load and +85°C ambient. THS4503IDGN datasheet Section 6.2 explicitly defines this constraint.
Does the THS4503IDGN support single-supply operation, and what is the minimum supply voltage?
Yes, the THS4503IDGN supports single-supply operation from 4.5 V to 15 V. At 5 V single supply, it delivers 320 MHz small-signal bandwidth and 1300 V/µs slew rate. The input common-mode range is 1.0 V to 4.0 V (min), and VOCM defaults to 2.5 V when left floating - enabling direct interfacing with 2.5 V-referenced ADCs. THS4503IDGN electrical characteristics tables confirm performance across both ±5 V and 5 V conditions.
How does the VOCM pin function in the THS4503IDGN, and what happens if it is left unconnected?
When left unconnected, the VOCM pin of the THS4503IDGN defaults to 2.5 V ±0.1 V (at +25°C), establishing the midpoint of the differential output swing. This internal bias allows immediate operation without external circuitry. If precise common-mode level is required (e.g., 1.25 V for a specific ADC), VOCM must be driven externally via a low-impedance source (<1 kΩ). THS4503IDGN datasheet Section 7.3 specifies VOCM input impedance as 25 kΩ || 1 pF and maximum input bias current of 3 µA.
Is the THS4503IDGN pin-compatible with the THS4502IDGN, and what design changes are needed for substitution?
Yes, THS4503IDGN and THS4502IDGN share identical pinout and package (MSOP-8 DGN), but THS4502IDGN's pin 8 is PD (power-down), whereas THS4503IDGN's pin 8 is NC. Substituting THS4503IDGN for THS4502IDGN requires leaving pin 8 unconnected and verifying that system-level power-down control is unnecessary. No PCB changes are required, but quiescent current will decrease by ~10–15% in active mode. THS4503IDGN datasheet Figure 10 confirms identical top-view pin assignments except for pin 8 function.
What is the differential output voltage swing capability of the THS4503IDGN into 1 kΩ load at ±5 V supply?
At ±5 V supply and –40°C to +85°C, the THS4503IDGN delivers a minimum differential output voltage swing of ±7.4 V into 1 kΩ, corresponding to 14.8 VPP. This is verified in the "Differential output voltage swing" parameter table (Section 7.5, Electrical Characteristics), where min values are specified across temperature. The swing remains linear with low distortion up to 2 VPP per output (4 VPP differential) at 30 MHz, as confirmed by harmonic distortion plots in Figures 4–7 of the THS4503IDGN datasheet.
THS4503IDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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-HVSSOP
THS4503IDGN FAQ
1.How can I place an order for THS4503IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4503IDGN 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 THS4503IDGN reliable?
The price and inventory of THS4503IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4503IDGN is usually 5 days.
3.What payment methods are accepted for THS4503IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4503IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4503IDGN?
THS4503IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4503IDGN 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 THS4503IDGN?
For technical support, including THS4503IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4503IDGN requirements.
6.How does Aetrix verify that THS4503IDGN is sourced from the original manufacturer or authorized distributors?
All THS4503IDGN 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 THS4503IDGN meets industry standards.
7.What is the process for return or replacement of THS4503IDGN?
All THS4503IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4503IDGN, 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 THS4503IDGN part is unused and in its original packaging.
Return procedure for THS4503IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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