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Texas Instruments THS4505DGKG4
- Part No.:
- THS4505DGKG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4505DGKG4.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,317
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Product details
Overview
THS4505DGKG4 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 RF receiver chains and active filtering applications.
For engineers reviewing the THS4505DGKG4 datasheet, THS4505DGKG4 pinout, THS4505DGKG4 application, or THS4505DGKG4 equivalent, key selection criteria include differential output swing (±7.4 V min into 1 kΩ), input common-mode range extending to the negative rail (–5.1 V min), VOCM control bandwidth (200 MHz), and MSOP-8 PowerPAD™ thermal performance - all critical for precision ADC interface design.
Technical Context
The THS4505DGKG4 implements a fully differential architecture with independent VOCM input for precise output common-mode voltage setting, supporting both single-ended-to-differential and differential-to-differential conversion. Its input stage features rail-to-rail common-mode capability on the negative side, enabling direct interfacing with low-voltage sensors or DAC outputs referenced to ground.
Unlike the THS4504, the THS4505DGKG4 omits power-down functionality - confirmed by pin assignment (PD pin absent) and electrical specifications excluding power-down quiescent current or enable thresholds. Its gain-bandwidth product remains stable at 210 MHz (G > +10), and output balance error is –65 dB at 100 kHz, ensuring matched differential paths for high-SNR data acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 260 MHz at G = 1 (±5 V): enables wideband IF sampling up to 130 MHz Nyquist zone without gain peaking. |
| Slew rate | 1800 V/µs (±5 V): supports full-scale 2 VPP steps at >200 MHz without slewing-induced distortion. |
| IMD3 | –73 dBc at 30 MHz (200 kHz tone spacing): meets linearity requirements for LTE/WiMAX baseband receivers. |
| OIP3 | 29 dBm at 30 MHz (50 Ω ref): allows direct drive of high-performance ADC inputs without external attenuation. |
| Input CM range | –5.1 V to +2.0 V (±5 V): accepts ground-referenced signals without level-shifting circuitry. |
| Differential output swing | ±7.4 V min into 1 kΩ (±5 V): provides >14 VPP headroom for 12-bit ADCs requiring ≥2 VFS differential input. |
| VOCM bandwidth | 200 MHz (RL = 400 Ω): permits fast common-mode correction during dynamic gain switching or multiplexed channel routing. |
Pinout & Package
THS4505DGKG4 is housed in an 8-pin MSOP package with exposed PowerPAD™ thermal pad (DGK suffix), optimized for high-frequency performance and thermal dissipation in space-constrained layouts. The PowerPAD is electrically isolated and must be soldered to PCB ground plane per TI layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Accepts differential or single-ended input; common-mode range includes VS− rail for ground-referenced sources. |
| VIN+ | Non-inverting input | Paired with VIN− for true differential operation; matched impedance critical for CMRR >70 dB. |
| VOCM | Output common-mode control | DC-set point for VOUT+ and VOUT− average; bandwidth 200 MHz enables dynamic common-mode adjustment. |
| VS+ | Positive supply | Supports ±5 V, ±7.5 V, or single 5–15 V operation; decoupling with 0.1 µF + 10 µF required per datasheet. |
| VS− | Negative supply | Required for dual-supply operation; pin connects directly to negative rail - no internal connection to PD. |
| VOUT+ | Positive differential output | Drives ADC AIN+ or transformer primary; balanced with VOUT− to maintain <–65 dB output balance error. |
| VOUT− | Negative differential output | Complements VOUT+; requires matched trace length and termination (e.g., 499 Ω series + 800 Ω diff load) for optimal IMD. |
| NC | No internal connection | Pin 5 is unconnected - not used for power-down (THS4504 only); must remain floating or grounded per layout rules. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and rejects common-mode noise, improving SNR by >3 dB vs single-ended drivers. |
| Output common-mode control (VOCM) | Enables precise alignment of differential output to ADC reference (e.g., 2.5 V), reducing offset-induced code errors. |
| Input common-mode range including VS− | Allows direct interface with 0 V–to–VREF DACs or ground-referenced sensors without level-shifting amplifiers. |
| High OIP3 (29 dBm) | Supports wide dynamic range signal chains - e.g., 12-bit ADCs sampling at 80 MSps with >70 dB SFDR. |
| MSOP-8 with PowerPAD™ | Reduces θJA to 260°C/W (DGK), enabling 154 mW max power dissipation at TA = +85°C without thermal derating. |
Applications
| Wireless Baseband Receiver | High-Speed Data Acquisition |
|---|---|
Use Scenario: Conditioning I/Q signals from quadrature demodulator before digitization in LTE femtocell transceivers. IC Role / Device Role / Timing Role: Single-ended-to-differential driver for 12-bit, 80-MSps ADC with matched gain/phase across I and Q paths. Use Value: –73 dBc IMD3 at 30 MHz ensures >70 dB SFDR, meeting 3GPP ACLR mask requirements without digital correction. | Use Scenario: Driving dual-channel simultaneous-sampling ADC in oscilloscope front-end with ±5 V analog input range. IC Role / Device Role / Timing Role: Differential line driver with 260 MHz bandwidth and 100 ns settling to 0.01%, enabling accurate 100-MHz waveform capture. Use Value: ±7.4 V differential output swing into 1 kΩ meets ADC full-scale requirement while maintaining <0.1% gain error. |
| Active Differential Filter | Instrumentation Signal Chain |
Use Scenario: Implementing 4th-order Butterworth anti-alias filter between PGA and ADC in portable spectrum analyzer. IC Role / Device Role / Timing Role: Active filter stage with VOCM-controlled common-mode bias, eliminating need for passive common-mode chokes. Use Value: 200 MHz VOCM bandwidth allows real-time filter center-frequency tuning via DAC-driven VOCM voltage. | Use Scenario: Interfacing low-noise instrumentation amplifier (e.g., INA163) to high-resolution ADC in medical ECG monitor. IC Role / Device Role / Timing Role: Low-distortion buffer isolating sensitive analog front-end from ADC switching noise. Use Value: 8 nV/√Hz input voltage noise and –93 dBc 3rd harmonic at 8 MHz preserve microvolt-level biopotential signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4504DGKG4 | Includes power-down pin (PD); otherwise identical AC/DC specs and pinout except NC → PD mapping. | Required where system-level power gating is needed (e.g., battery-powered handheld test equipment). | Select THS4504DGKG4 only if power-down functionality is mandatory; THS4505DGKG4 offers same performance with simpler biasing. |
| LMH5401IRGT | Higher bandwidth (1.8 GHz), lower noise (2.3 nV/√Hz), but requires external VOCM resistor network and lacks rail-included input CMR. | Better suited for >500 MSPS ADCs or ultra-low-noise applications; not drop-in due to different VOCM interface and layout constraints. | Choose LMH5401IRGT for next-generation >1-GHz sampling; THS4505DGKG4 remains optimal for cost-sensitive 80-MSps systems with ground-referenced inputs. |
Compared with THS4504DGKG4, THS4505DGKG4 removes power-down complexity while retaining identical linearity and bandwidth - simplifying layout and reducing BOM count. Versus LMH5401IRGT, it trades bandwidth for integrated VOCM control and rail-to-negative-rail input, making it more robust for industrial ADC interfaces.
Availability
THS4505DGKG4 is available at Aetrix Electronics and suitable for wireless infrastructure, high-speed data acquisition, and instrumentation applications requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade traceability.
Supply support for THS4505DGKG4 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 over 50 years of innovation in high-performance signal chain components.
The THS4505DGKG4 belongs to TI's high-speed differential amplifier product line, engineered specifically for precision ADC driver applications demanding exceptional linearity, wide bandwidth, and robust DC-coupled interface capability.
FAQ
What is the maximum supply voltage for THS4505DGKG4?
The absolute maximum supply voltage for THS4505DGKG4 is ±7.5 V for dual-supply operation or 15 V for single-supply use, as specified in the Absolute Maximum Ratings table. Operating beyond these limits risks permanent damage. For reliable 12-bit ADC interface performance, TI recommends staying within ±5 V or 5 V to 12 V ranges per the Recommended Operating Conditions.
Does THS4505DGKG4 support single-ended input configurations?
Yes, THS4505DGKG4 supports single-ended-to-differential conversion using standard resistor networks (e.g., 499 Ω feedback and gain-setting resistors). The datasheet provides verified application circuits for this configuration, achieving –73 dBc IMD3 at 30 MHz with proper layout and termination matching between VOUT+ and VOUT− paths.
How does the VOCM pin function in THS4505DGKG4?
The VOCM pin in THS4505DGKG4 sets the average DC voltage of VOUT+ and VOUT−. When left floating, it defaults to ~0 V (±0.1 V) under ±5 V supplies. Driving VOCM with a stable voltage (e.g., 2.5 V from ADC reference) centers the differential output precisely, minimizing common-mode-induced code errors in the ADC - a critical feature for DC-coupled signal chains.
What thermal considerations apply to THS4505DGKG4 in MSOP-8 PowerPAD™ package?
THS4505DGKG4 in DGK package has θJA = 260°C/W and max power dissipation of 154 mW at TA = +85°C. To maintain junction temperature ≤+125°C, the PowerPAD must be soldered to a minimum 100 mm² copper pour tied to PCB ground. TI recommends thermal vias under the pad and avoiding nearby heat sources to prevent distortion increase above +125°C.
Is THS4505DGKG4 pin-compatible with THS4504DGKG4?
THS4505DGKG4 and THS4504DGKG4 share identical pinout and package (MSOP-8 DGK), but differ at Pin 5: THS4504 uses PD (power-down), while THS4505 leaves it NC (no internal connection). Layouts designed for THS4504 can accommodate THS4505DGKG4 if Pin 5 is left unconnected or grounded - no PCB changes required for footprint reuse.
THS4505DGKG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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
THS4505DGKG4 FAQ
1.How can I place an order for THS4505DGKG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4505DGKG4 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 THS4505DGKG4 reliable?
The price and inventory of THS4505DGKG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4505DGKG4 is usually 5 days.
3.What payment methods are accepted for THS4505DGKG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4505DGKG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4505DGKG4?
THS4505DGKG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4505DGKG4 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 THS4505DGKG4?
For technical support, including THS4505DGKG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4505DGKG4 requirements.
6.How does Aetrix verify that THS4505DGKG4 is sourced from the original manufacturer or authorized distributors?
All THS4505DGKG4 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 THS4505DGKG4 meets industry standards.
7.What is the process for return or replacement of THS4505DGKG4?
All THS4505DGKG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS4505DGKG4, 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 THS4505DGKG4 part is unused and in its original packaging.
Return procedure for THS4505DGKG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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