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Texas Instruments THS4505DGKRG4
- Part No.:
- THS4505DGKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4505DGKRG4.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,551
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Product details
Overview
THS4505DGKRG4 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, –73 dBc third-order intermodulation distortion at 30 MHz, and 1800 V/µs slew rate under ±5 V supply, enabling high-fidelity signal conditioning in wireless receiver chains and active differential filtering applications.
For engineers reviewing the THS4505DGKRG4 datasheet, THS4505DGKRG4 pinout, THS4505DGKRG4 application, or THS4505DGKRG4 equivalent, this page provides verified technical context, package-specific pin mapping, real-world application scenarios, and validated alternative options for ADC driver selection in RF and instrumentation systems.
Technical Context
The THS4505DGKRG4 implements a fully differential architecture with independent output common-mode voltage control via the VOCM pin, supporting precise DC-coupled interfacing to ADC inputs. Its input common-mode range extends to the negative rail (–5.7 V at ±5 V supply), enabling single-ended-to-differential conversion without level-shifting circuitry.
It features a high-speed current-feedback topology delivering 260 MHz bandwidth and 1800 V/µs slew rate under ±5 V operation, with OIP3 of 29 dBm at 30 MHz - confirming suitability for demanding wideband receiver front-ends where linearity and settling performance are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 260 MHz at G = 1, ±5 V supply - supports wideband IF sampling up to 100 MHz Nyquist zone. |
| Slew rate | 1800 V/µs - ensures full-scale step response within 100 ns for 4 VPP outputs, critical for fast-settling ADC drivers. |
| IMD3 distortion | –73 dBc at 30 MHz, 200 kHz tone spacing - meets linearity requirements for LTE/WiMAX baseband receivers. |
| OIP3 | 29 dBm at 30 MHz, referenced to 50 Ω - enables direct drive of high-performance ADCs without external gain stages. |
| Input voltage noise | 8 nV/√Hz above 1 MHz - minimizes added noise in precision signal chains before digitization. |
| Quiescent current | 25 mA max at ±5 V, +85°C - balances power efficiency with high-speed performance in thermally constrained layouts. |
| Common-mode input range | –5.7 V to +2.6 V at ±5 V supply - accommodates ground-referenced single-ended sources without biasing networks. |
Pinout & Package
THS4505DGKRG4 is packaged in an 8-pin MSOP (DGK) with exposed thermal pad (PowerPAD™), offering compact footprint and enhanced thermal dissipation for high-power analog signal paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; accepts complementary signal or single-ended source with proper termination. |
| VIN+ | Non-inverting input | Differential input node; used with VIN− to establish gain and common-mode rejection. |
| VOCM | Output common-mode control | Sets DC offset of differential outputs; directly interfaces to ADC reference or mid-supply bias point. |
| VS+ | Positive supply | Accepts +5 V, +12 V, or +15 V single supply or +5 V/+7.5 V dual supply; decoupling required per layout guidelines. |
| VS− | Negative supply | Required for dual-supply operation (e.g., –5 V); tied to ground for single-supply use with appropriate VOCM setting. |
| VOUT+ | Positive differential output | Drives one leg of ADC differential input; balanced with VOUT− for optimal CMRR and harmonic suppression. |
| VOUT− | Negative differential output | Complementary output leg; must be routed symmetrically to VOUT+ to preserve balance and minimize skew. |
| PD | Power-down control | No internal connection on THS4505DGKRG4 - device lacks power-down functionality (distinguishes it from THS4504). |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and common-mode noise coupling, improving ADC effective resolution by ≥1 LSB in noisy environments. |
| Output common-mode control (VOCM) | Enables precise alignment of differential output swing to ADC input range (e.g., 0–5 V or ±2.5 V), removing need for external level-shifting resistors. |
| Input common-mode range includes VS− | Supports direct interface to ground-referenced sensors or DAC outputs without AC coupling or biasing circuits, reducing component count and phase error. |
| Wide supply range (±5 V to ±7.5 V / 4.5–15 V) | Allows reuse across multiple system voltage domains - e.g., ±5 V for test equipment, +5 V for portable instrumentation, +12 V for industrial signal conditioning. |
| 260 MHz bandwidth & 1800 V/µs slew rate | Ensures <0.01% settling in ≤100 ns for 4 VPP steps, meeting timing budgets for 80-MSps ADCs with minimal aperture jitter impact. |
Applications
| Wireless Baseband Receiver | High-Speed Data Acquisition |
|---|---|
Use Scenario: Conditioning I/Q signals from quadrature demodulators prior to 12-bit, 80-MSps ADC sampling in LTE femtocell receivers. IC Role / Device Role: Single-ended-to-differential converter and anti-alias filter driver with precise VOCM alignment to ADC reference. Use Value: –73 dBc IMD3 at 30 MHz preserves EVM performance; 260 MHz bandwidth supports >100 MHz IF bandwidth without gain peaking. |
Use Scenario: Driving differential inputs of pipeline ADCs in automated test equipment requiring 12-bit accuracy at 80 MSPS. IC Role / Device Role: High-fidelity buffer with low 8 nV/√Hz noise and rail-to-rail input common-mode range. Use Value: Input range extending to VS− allows direct connection to DAC outputs; 1800 V/µs slew rate ensures sub-100 ns settling for full-scale transitions. |
| Active Differential Line Driver | Instrumentation Signal Conditioning |
Use Scenario: Transmitting balanced analog waveforms over 50 Ω coaxial cables in arbitrary waveform generators. IC Role / Device Role: Low-distortion differential driver with 29 dBm OIP3 and matched output impedance. Use Value: Output balance error <–65 dB enables >80 dB common-mode rejection at 100 kHz, minimizing radiated emissions and crosstalk. |
Use Scenario: Amplifying low-level sensor outputs (e.g., strain gauges, RTDs) before digitization in precision measurement systems. IC Role / Device Role: High-PSRR (80 dB) differential amplifier rejecting supply noise while maintaining DC accuracy. Use Value: 80 dB PSRR and 70 dB CMRR ensure stable offset and gain over temperature; VOCM pin simplifies calibration of zero-point drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4504DGKRG4 | Identical pinout and bandwidth, but includes functional PD pin enabling 800 µA power-down mode. | Preferred where dynamic power management is required (e.g., battery-powered portable instruments). | Select THS4504DGKRG4 only if power-down capability is needed; THS4505DGKRG4 offers identical AC performance with simplified control logic. |
| LMH5401RTVR | Higher 1.2 GHz bandwidth, 3600 V/µs slew rate, but requires external VOCM resistor network and has higher 32 mA quiescent current. | Better suited for >100 MSPS ADCs or mmWave IF stages; less optimal for cost-sensitive 80 MSPS designs. | Choose LMH5401RTVR when bandwidth headroom >500 MHz is required; THS4505DGKRG4 provides optimal balance of linearity, speed, and power for 12-bit/80-MSps systems. |
Compared with THS4504DGKRG4, THS4505DGKRG4 removes power-down complexity while retaining identical linearity and speed; versus LMH5401RTVR, it trades bandwidth for lower power and simpler VOCM implementation - making it the preferred choice for deterministic 80-MSps ADC driver applications.
Availability
THS4505DGKRG4 is available at Aetrix Electronics and suitable for wireless infrastructure, high-speed data acquisition, and precision instrumentation applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for THS4505DGKRG4 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 signal chain solutions.
The THS4505DGKRG4 belongs to TI's high-performance fully differential amplifier product line, engineered specifically for driving high-resolution, high-speed ADCs in communications and test equipment where linearity, bandwidth, and noise performance are critical.
FAQ
What is the function of the PD pin on THS4505DGKRG4?
The PD (Power-Down) pin is not internally connected on the THS4505DGKRG4. Unlike the THS4504 variant, the THS4505DGKRG4 lacks power-down functionality - the PD pin must be left unconnected or tied to a fixed potential without affecting operation. This simplifies control logic in always-on signal chain designs.
Can THS4505DGKRG4 operate from a single 5-V supply?
Yes, THS4505DGKRG4 supports single-supply operation at 5 V. When configured this way, VS− is connected to ground, VOCM is set to 2.5 V (mid-supply), and the input common-mode range becomes –0.7 V to +2.6 V - sufficient for most ground-referenced sources. Output swing is ±3.3 V into 1 kΩ, referenced to VOCM.
What is the maximum differential output voltage swing for THS4505DGKRG4?
Under ±5 V supply and RL = 1 kΩ, THS4505DGKRG4 delivers a minimum differential output voltage swing of ±8 V (16 VPP). At 5 V single supply, the swing reduces to ±3.3 V (6.6 VPP) referenced to VOCM = 2.5 V. Load impedance and gain configuration directly affect achievable swing.
How does THS4505DGKRG4 achieve high linearity at 30 MHz?
THS4505DGKRG4 achieves –73 dBc third-order intermodulation distortion at 30 MHz through its optimized current-feedback architecture, low-noise input stage, and symmetrical differential layout. The 29 dBm OIP3 value confirms robust large-signal handling, validated under RF = RG = 499 Ω, 200 kHz tone spacing, and 2 VPP output conditions.
Is THS4505DGKRG4 compatible with the THS4504DGKRG4 PCB layout?
Yes, THS4505DGKRG4 shares identical MSOP-8 (DGK) package dimensions, pinout, and thermal pad configuration with THS4504DGKRG4. Since the PD pin is NC on THS4505DGKRG4, existing layouts designed for THS4504DGKRG4 can accommodate THS4505DGKRG4 without modification - though power-down circuitry should be omitted or disabled.
THS4505DGKRG4 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:
- 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-VSSOP
THS4505DGKRG4 FAQ
1.How can I place an order for THS4505DGKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4505DGKRG4 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 THS4505DGKRG4 reliable?
The price and inventory of THS4505DGKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4505DGKRG4 is usually 5 days.
3.What payment methods are accepted for THS4505DGKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4505DGKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4505DGKRG4?
THS4505DGKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4505DGKRG4 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 THS4505DGKRG4?
For technical support, including THS4505DGKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4505DGKRG4 requirements.
6.How does Aetrix verify that THS4505DGKRG4 is sourced from the original manufacturer or authorized distributors?
All THS4505DGKRG4 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 THS4505DGKRG4 meets industry standards.
7.What is the process for return or replacement of THS4505DGKRG4?
All THS4505DGKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS4505DGKRG4, 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 THS4505DGKRG4 part is unused and in its original packaging.
Return procedure for THS4505DGKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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