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Texas Instruments THS4505DR
- Part No.:
- THS4505DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4505DR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,195
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Product details
Overview
THS4505DR from Texas Instruments is a high-linearity, fully differential amplifier optimized for driving 12-bit, 80-MSps analog-to-digital converters (ADCs). It delivers 260 MHz small-signal bandwidth, 1800 V/µs slew rate, and –73 dBc third-order intermodulation distortion at 30 MHz under ±5 V supply - enabling high-fidelity signal conditioning in wireless receiver chains and active differential filtering applications.
For engineers reviewing the THS4505DR datasheet, THS4505DR pinout, THS4505DR application, or THS4505DR equivalent, key selection criteria include its input common-mode range extending to the negative rail, output common-mode voltage control (VOCM) interface, differential output swing of ±7.4 V (±5 V supply), and SOIC-8 package with PowerPAD™ thermal enhancement.
Technical Context
The THS4505DR implements a fully differential architecture with independent VOCM input for precise output common-mode level setting, supporting both single-ended-to-differential and differential-to-differential conversion. Its input stage features rail-to-rail common-mode capability down to VS–, enabling direct interfacing with low-voltage sensors or DAC outputs.
It operates across wide supply ranges (±5 V to ±7.5 V or 5 V to 15 V single-ended), maintains >70 dB CMRR up to 100 kHz, and achieves 0.1-dB gain flatness to 65 MHz - making it suitable for wideband IF sampling and baseband signal chain stages where amplitude fidelity and phase matching are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 260 MHz at G = 1 (±5 V): enables wideband IF amplification up to UHF frequencies without gain peaking. |
| Slew rate | 1800 V/µs (±5 V): supports full-scale 2 VPP step response in <1 ns, critical for fast-settling ADC driver stages. |
| IMD3 @ 30 MHz | –73 dBc (200 kHz tone spacing): ensures minimal spectral regrowth when driving high-resolution ADCs in communication receivers. |
| OIP3 | 29 dBm (referenced to 50 Ω, ±5 V): provides robust linearity margin for +10 dBm input signals in LTE/WiMAX front ends. |
| Input voltage noise | 8 nV/√Hz (>1 MHz): contributes <0.5 LSB noise floor when driving 12-bit ADCs with 1 kΩ effective source impedance. |
| Common-mode input range | –5.1 V to +2.0 V (±5 V): allows direct connection to ground-referenced sources without level-shifting circuitry. |
| Quiescent current | 25 mA max (±5 V, +85°C): balances performance and power in thermally constrained RF modules. |
Pinout & Package
THS4505DR is housed in an 8-pin SOIC package with exposed PowerPAD™ thermal pad (D package), offering enhanced thermal dissipation (θJA = 97.5°C/W) and improved ac performance versus standard SOIC.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; accepts single-ended or complementary signals; biased internally to mid-supply in typical configurations. |
| VIN+ | Non-inverting input | Differential input node; paired with VIN− to define gain and common-mode rejection path. |
| VOCM | Output common-mode control | DC voltage input setting output common-mode level (e.g., 2.5 V for 5-V ADC reference); high-impedance (25 kΩ || 1 pF). |
| VS+ | Positive supply | Accepts +5 V to +7.5 V (dual) or +5 V to +15 V (single); decoupling with 0.1 µF + 10 µF required per datasheet. |
| VS− | Negative supply | Accepts –5 V to –7.5 V (dual); supports true bipolar operation and rail-to-rail input common-mode range. |
| VOUT+ | Positive differential output | Drives ADC AIN+ or transformer primary; specified swing ±7.4 V into 1 kΩ (±5 V supply). |
| VOUT− | Negative differential output | Drives ADC AIN− or transformer secondary; matched to VOUT+ for <–65 dB balance error at 100 kHz. |
| PD | Power-down (no connect) | No internal connection on THS4505DR; distinct from THS4504 - this pin must be left unconnected or tied to VS−. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and common-mode noise coupling, improving dynamic range by >10 dB vs single-ended drivers. |
| Output common-mode control (VOCM) | Enables precise alignment of differential output to ADC reference voltage (e.g., 2.5 V), reducing offset-induced code errors. |
| Rail-to-rail input common-mode range | Includes VS− rail (–5.1 V min at ±5 V), allowing direct interface with low-voltage DACs or sensor outputs without external biasing. |
| High OIP3 (29 dBm) | Supports >+10 dBm input signals before compression, essential for wide dynamic range in cellular and broadband receiver front ends. |
| SOIC-8 with PowerPAD™ | Reduces junction-to-ambient thermal resistance by 35% vs standard SOIC, sustaining full performance at +85°C ambient. |
Applications
| Wireless Base Station Receiver | High-Speed Data Acquisition System |
|---|---|
Use Scenario: Amplifying 70–250 MHz IF signals prior to digitization in LTE macrocell transceivers. IC Role / Device Role / Timing Role: Fully differential ADC driver with VOCM-adjustable output level matched to 12-bit, 80-MSps ADC reference. Use Value: –73 dBc IMD3 at 30 MHz preserves adjacent channel power ratio (ACPR) compliance; 260 MHz bandwidth accommodates multi-carrier signals. |
Use Scenario: Conditioning sensor outputs (e.g., piezoelectric, strain gauge) for precision 12-bit digitization in test equipment. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with rail-to-rail input, rejecting ground-loop noise in mixed-signal PCB layouts. Use Value: Input common-mode range down to VS– eliminates need for external bias networks; 8 nV/√Hz noise ensures <0.5 LSB quantization error contribution. |
| Differential Line Driver | Active Filtering Stage |
Use Scenario: Driving long PCB traces or coaxial cables between FPGA-based signal processors and ADCs in radar subsystems. IC Role / Device Role / Timing Role: High-current differential output stage (130 mA drive) maintaining amplitude/phase balance over frequency. Use Value: –65 dB output balance error at 100 kHz minimizes image distortion; ±7.4 V swing drives 50 Ω loads directly without external termination. |
Use Scenario: Implementing 2nd-order active low-pass filtering before ADC input in medical imaging front ends. IC Role / Device Role / Timing Role: Configurable gain block (G = 1 to 10) with VOCM-controlled DC offset, replacing passive RC filters and op-amp buffers. Use Value: 0.1-dB flatness to 65 MHz enables sharp roll-off without passband ripple; differential topology rejects EMI-induced common-mode interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4504DR | Identical architecture and AC specs, but includes functional power-down pin (PD); quiescent current drops to 1.2 mA in shutdown. | Required where system-level power gating is needed (e.g., battery-powered portable radios); THS4505DR lacks PD functionality. | Select THS4504DR only if power-down sequencing is mandatory; otherwise THS4505DR offers identical signal-chain performance with simpler layout. |
| THS4131DGKR | Lower bandwidth (150 MHz), lower slew rate (51 V/µs), but lower noise (1.3 nV/√Hz) and higher PSRR (90 dB). | Better suited for precision dc-coupled instrumentation than wideband RF; not viable for >40 MHz signal paths. | Choose THS4131DGKR for sub-20 MHz, low-noise applications; THS4505DR remains optimal for >60 MHz IF/RF driver roles. |
Compared with THS4504DR and THS4131DGKR, the THS4505DR delivers unmatched 260 MHz bandwidth and 1800 V/µs slew rate for high-speed ADC driving, while avoiding power-down complexity and preserving full RF linearity - making it the preferred choice for fixed-power, wideband signal chain stages.
Availability
THS4505DR is available at Aetrix Electronics and suitable for wireless infrastructure, high-speed data acquisition, and differential line driving applications requiring stable component supply, consistent parametric performance across temperature, and long-term industrial lifecycle support.
Supply support for THS4505DR 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 innovation in high-performance signal chain components.
The THS4505DR belongs to TI's THS45xx family of fully differential amplifiers, engineered specifically for high-fidelity, wideband ADC driver and differential signal conditioning applications in communications and test equipment.
FAQ
What is the maximum supply voltage for THS4505DR?
The THS4505DR supports dual supplies up to ±7.5 V or single supply up to 15 V. Absolute maximum ratings specify ±8.25 V on VS+ and VS−, but recommended operating conditions limit continuous use to ±7.5 V to ensure reliability and maintain specified AC performance across temperature.
Does THS4505DR support single-ended input configuration?
Yes, the THS4505DR is commonly used in single-ended-to-differential mode: VIN+ is biased to mid-supply (e.g., 2.5 V), while VIN− receives the signal. The datasheet provides resistor network examples (e.g., 499 Ω feedback/resistor) and specifies harmonic distortion performance under this configuration.
What is the function of the PD pin on THS4505DR?
The PD pin on THS4505DR has no internal connection and must be left floating or tied to VS−. Unlike the THS4504DR, the THS4505DR does not implement power-down functionality - this distinction is explicitly noted in the device ordering table and pin assignment diagrams.
Can THS4505DR drive a 50 Ω load directly?
The THS4505DR can deliver 130 mA differential output current into 20 Ω loads and maintains ±7.4 V swing into 1 kΩ. For 50 Ω, it requires external series termination (e.g., 25 Ω per leg) to avoid excessive current draw and maintain stability; direct 50 Ω drive is not recommended per datasheet guidelines.
How does VOCM affect THS4505DR output swing and accuracy?
VOCM sets the DC common-mode level of VOUT+ and VOUT−. When VOCM = 2.5 V, outputs center at 2.5 V with ±7.4 V differential swing possible. Deviations in VOCM cause proportional shifts in output offset; the datasheet specifies ±7.6 mV common-mode offset error over temperature, directly impacting ADC code-center accuracy.
THS4505DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 1800V/µs
- Gain Bandwidth Product:
- 210 MHz
- -3db Bandwidth:
- 260 MHz
- Current - Input Bias:
- 4 µA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 16mA
- 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-SOIC
THS4505DR FAQ
1.How can I place an order for THS4505DR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4505DR 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 THS4505DR reliable?
The price and inventory of THS4505DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4505DR is usually 5 days.
3.What payment methods are accepted for THS4505DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4505DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4505DR?
THS4505DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4505DR 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 THS4505DR?
For technical support, including THS4505DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4505DR requirements.
6.How does Aetrix verify that THS4505DR is sourced from the original manufacturer or authorized distributors?
All THS4505DR 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 THS4505DR meets industry standards.
7.What is the process for return or replacement of THS4505DR?
All THS4505DR units undergo pre-shipment inspection (PSI). If there is an issue with THS4505DR, 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 THS4505DR part is unused and in its original packaging.
Return procedure for THS4505DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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