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Texas Instruments THS4505DGN
- Part No.:
- THS4505DGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4505DGN.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,757
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Product details
Overview
THS4505DGN from Texas Instruments is a high-performance, fully differential amplifier optimized for driving high-speed ADCs in precision signal chains. 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 12-bit accuracy through 40 MHz in wireless receiver front-ends and instrumentation systems.
For engineers reviewing the THS4505DGN datasheet, THS4505DGN pinout, THS4505DGN application, or THS4505DGN equivalent, key selection criteria include its input common-mode range extending to the negative rail (–5.7 V), output common-mode voltage control (VOCM) interface, MSOP-8 PowerPAD™ package for thermal performance, and absence of power-down functionality compared to THS4504.
Technical Context
The THS4505DGN implements a fully differential architecture with independent VOCM input for precise output common-mode 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 without level-shifting.
It operates across dual ±5 V to ±7.5 V or single 5 V to 15 V supplies, delivering 130 mA differential output current drive into 20 Ω loads and maintaining <0.1 Ω closed-loop output impedance at 1 MHz - critical for driving ADC inputs with minimal gain error and phase mismatch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 260 MHz at G = 1 (±5 V): enables wideband IF sampling up to 125 MHz Nyquist zone without gain peaking. |
| Slew rate | 1800 V/µs (±5 V): supports full-scale 2 VPP step response within 1 ns, preserving transient fidelity in pulsed RF applications. |
| IMD3 distortion | –73 dBc at 30 MHz, 200 kHz tone spacing: ensures >72 dB SFDR for 12-bit ADC drivers in LTE/WiMAX receivers. |
| OIP3 | 29 dBm at 30 MHz (50 Ω referenced): provides robust linearity margin against blocker signals in cellular base station front-ends. |
| Input voltage noise | 8 nV/√Hz above 1 MHz: contributes <0.5 LSB noise floor when driving 12-bit, 80 MSps ADCs with 1 kΩ source impedance. |
| Quiescent current | 16–25 mA (±5 V): balances power efficiency and linearity for battery-sensitive portable test equipment. |
| Common-mode input range | –5.7 V to +2.6 V (±5 V): accepts ground-referenced single-ended sources without external biasing networks. |
Pinout & Package
THS4505DGN uses an 8-pin MSOP package with exposed PowerPAD™ thermal pad (DGN suffix), optimized for low thermal resistance (θJC = 4.7 °C/W) and enhanced ac performance in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; matched to VIN+ for CMRR >70 dB; requires symmetrical layout to preserve balance. |
| VIN+ | Non-inverting input | Differential input node; accepts dc-coupled or ac-coupled signals; input impedance 10⁷ Ω || 1 pF. |
| VOCM | Output common-mode control | Setpoint input for VOUT+ and VOUT− average voltage; drives 100 µA max at ±5 V; default ~0 V if floating. |
| 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. |
| VOUT+ | Positive differential output | Drives ADC AIN+ or transformer primary; swing ±8 V into 1 kΩ (±5 V); balanced with VOUT− to <–65 dB. |
| VS− | Negative supply | Accepts –5 V to –7.5 V (dual); supports true bipolar operation; must be decoupled identically to VS+. |
| VOUT− | Negative differential output | Complementary to VOUT+; maintains amplitude/phase match for <0.1° skew up to 100 MHz. |
| PD | Power-down control | No internal connection on THS4505DGN (non-power-down variant); 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 ADC SNR by ≥3 dB vs single-ended drivers. |
| Output common-mode control (VOCM) | Enables precise alignment of differential output to ADC reference mid-point (e.g., 2.5 V), reducing offset-induced code errors. |
| Input common-mode range including VS– | Supports direct connection to ground-referenced DACs or sensors without level-shift circuitry, saving BOM cost and board area. |
| Wide supply range (±5 V to ±7.5 V / 5 V to 15 V) | Facilitates reuse across multiple platforms - e.g., ±5 V for lab instruments, +12 V for industrial data acquisition. |
| MSOP-8 PowerPAD™ package | Reduces junction-to-case thermal resistance to 4.7 °C/W, allowing 1.71 W dissipation at TA ≤+25°C for sustained high-linearity operation. |
Applications
| Wireless Communication Receiver | High-Speed Data Acquisition |
|---|---|
Use Scenario: Downconverting LTE FDD signals at 1800–2600 MHz IF (40–120 MHz) before digitization. IC Role / Device Role / Timing Role: ADC driver amplifying filtered IF signal to full-scale differential input of 12-bit, 80 MSps ADC. Use Value: –73 dBc IMD3 and 260 MHz bandwidth maintain >72 dB SFDR across entire IF band, meeting 3GPP ACLR requirements. |
Use Scenario: Digitizing fast transient waveforms from oscilloscope front-ends or automated test equipment. IC Role / Device Role / Timing Role: High-fidelity buffer between probe amplifier and 12-bit, 80 MSps pipeline ADC. Use Value: 1800 V/µs slew rate and 100 ns settling to 0.01% ensure sub-ns timing accuracy for 100 ps rise-time signals. |
| Instrumentation Signal Conditioning | Digital-to-Analog Converter Interface |
Use Scenario: Amplifying low-level sensor outputs (e.g., strain gauge bridges) in precision weigh scales or medical ECG front-ends. IC Role / Device Role / Timing Role: Differential line driver isolating sensitive analog section from noisy digital domains. Use Value: 80 dB CMRR and 8 nV/√Hz input noise preserve microvolt-level resolution without additional filtering. |
Use Scenario: Level-shifting and buffering output of 12-bit, ±5 V DACs to match differential input range of high-resolution ADCs. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with VOCM-adjustable output common-mode. Use Value: Input common-mode range extending to VS– allows direct connection to DAC outputs referenced to ground or negative rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4504DGN | Identical pinout and AC specs, but includes functional PD pin for 800 µA power-down current. | Required where system-level power gating or standby mode is mandated (e.g., portable spectrum analyzers). | Select THS4504DGN only if active power-down control is needed; THS4505DGN simplifies design by eliminating PD routing. |
| THS4131DGK | Lower bandwidth (150 MHz), higher PSRR (75 dB), and lower noise (1.3 nV/√Hz), but no VOCM control and limited input common-mode range. | Better suited for low-noise, medium-bandwidth applications like audio ADC interfaces or precision DC-coupled sensors. | Choose THS4131DGK when ultra-low noise dominates over wideband linearity; THS4505DGN prioritizes RF/IF fidelity. |
Compared with THS4504DGN, THS4505DGN removes power-down complexity while retaining identical linearity and bandwidth - ideal for fixed-power systems. Versus THS4131DGK, it trades 1.3 nV/√Hz noise for 260 MHz bandwidth and VOCM flexibility, making it superior for RF sampling and mixed-signal timing-critical designs.
Availability
THS4505DGN is available at Aetrix Electronics and suitable for wireless infrastructure, high-speed data acquisition, and precision instrumentation requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade traceability.
Supply support for THS4505DGN 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 THS4505 belongs to TI's high-linearity fully differential amplifier product line, engineered specifically for driving high-resolution, high-speed ADCs in communications, test equipment, and industrial measurement systems.
FAQ
What is the maximum operating supply voltage for THS4505DGN?
The THS4505DGN supports dual-supply operation up to ±7.5 V and single-supply operation up to 15 V. Absolute maximum ratings specify 16.5 V total supply difference, but recommended operation remains within ±7.5 V or 15 V to ensure specified distortion and bandwidth performance per the datasheet.
Does THS4505DGN support single-ended input configurations?
Yes, THS4505DGN is commonly used in single-ended-to-differential conversion. With VIN– grounded or biased and VIN+ driven, the device achieves >70 dB CMRR and preserves harmonic distortion performance - validated in Figure 5 and Table 1 of the SLOS363D datasheet for ±5 V operation.
What is the function of the PD pin on THS4505DGN?
The PD pin on THS4505DGN has no internal connection and must be left unconnected or tied to VS−. Unlike the THS4504DGN, the THS4505DGN lacks power-down functionality - this is explicitly stated in the "APPLICATIONS" and "PIN ASSIGNMENTS" sections of the datasheet.
How does the VOCM pin affect THS4505DGN output behavior?
The VOCM pin sets the average voltage of VOUT+ and VOUT−. When VOCM = 2.5 V, outputs center at 2.5 V; when VOCM = 0 V, they center at 0 V. The THS4505DGN maintains <0.1% gain error across VOCM = ±4 V (±5 V supply), enabling precise matching to ADC reference voltages without external resistive dividers.
Is THS4505DGN suitable for driving ADCs with 1.8-V I/O interfaces?
No - THS4505DGN is not designed for 1.8-V logic-level interfaces. Its minimum output swing is ±2.8 V (at 5 V supply, RL = 1 kΩ), and it requires ≥5 V total supply headroom. For 1.8-V ADCs, consider TI's THS4561 or ADI's ADA4940 family, which support rail-to-rail output and lower supply voltages.
THS4505DGN 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:
- 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:
- 130 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
THS4505DGN FAQ
1.How can I place an order for THS4505DGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4505DGN 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 THS4505DGN reliable?
The price and inventory of THS4505DGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4505DGN is usually 5 days.
3.What payment methods are accepted for THS4505DGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4505DGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4505DGN?
THS4505DGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4505DGN 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 THS4505DGN?
For technical support, including THS4505DGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4505DGN requirements.
6.How does Aetrix verify that THS4505DGN is sourced from the original manufacturer or authorized distributors?
All THS4505DGN 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 THS4505DGN meets industry standards.
7.What is the process for return or replacement of THS4505DGN?
All THS4505DGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4505DGN, 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 THS4505DGN part is unused and in its original packaging.
Return procedure for THS4505DGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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