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Texas Instruments THS4221DGK
- Part No.:
- THS4221DGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4221DGK.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,505
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Product details
Overview
THS4221DGK from Texas Instruments is a single-channel, rail-to-rail output, high-speed operational amplifier optimized for low-distortion signal conditioning in data converter interfaces and video systems. It delivers 230 MHz small-signal bandwidth (G = 1), 975 V/µs slew rate, −90 dBc HD2 and −100 dBc HD3 at 5 MHz (RL = 499 Ω), and ±4.8 V output swing into 2 kΩ on ±5 V supplies.
For engineers reviewing the THS4221DGK datasheet, THS4221DGK pinout, THS4221DGK application, or THS4221DGK equivalent, this page provides verified electrical specifications, MSOP-8 package terminal mapping, video-grade AC performance metrics, and validated alternatives for ADC driver, active filter, and low-voltage analog signal chain design.
Technical Context
The THS4221DGK employs a voltage-feedback architecture with a rail-to-rail output stage enabling full dynamic range utilization across 3 V to 15 V single-supply or ±1.35 V to ±7.5 V dual-supply operation. Its 230 MHz bandwidth and 975 V/µs slew rate support fast settling (25 ns to 0.1%) for high-resolution ADC front-ends.
It features 33 MΩ input resistance, 1 pF common-mode input capacitance, and maintains −90 dBc second-harmonic distortion at 5 MHz under 2 VPP output - critical for NTSC/PAL video applications requiring 0.007% differential gain and 0.007° differential phase accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 230 MHz at G = 1 (±5 V, RL = 499 Ω) - enables wideband baseband signal amplification without peaking. |
| Slew rate | 975 V/µs (G = 1, VO = ±2.5 Vpp) - supports clean 10-bit+ ADC sampling of fast transients. |
| Harmonic distortion | HD2 = −90 dBc, HD3 = −100 dBc at 5 MHz (RL = 499 Ω) - preserves spectral purity in RF and video signal paths. |
| Rail-to-rail output swing | −4.8 V / +4.8 V into 2 kΩ (VS = ±5 V) - maximizes SNR by utilizing full supply headroom. |
| Input voltage noise | 13 nV/√Hz at 1 MHz - low enough to avoid degrading 12–14-bit system ENOB in precision gain stages. |
| Quiescent current | 14 mA per channel (±5 V) - balances speed and power for portable or thermally constrained designs. |
| Differential gain/phase | 0.007% / 0.007° (NTSC/PAL, G = 2) - meets broadcast video fidelity requirements without external calibration. |
Pinout & Package
THS4221DGK is housed in an 8-pin PowerPAD™ MSOP package (DGK), with thermal pad exposed on underside for PCB-level heat dissipation. The package footprint is 3.0 mm × 3.0 mm × 1.0 mm, compatible with standard MSOP-8 reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unbonded pad; must be left floating or grounded per layout best practices. |
| 2 (IN−) | Inverting input | High-impedance node (33 MΩ) accepting differential or single-ended signals with 1 pF capacitance. |
| 3 (IN+) | Non-inverting input | DC-biased reference point for single-supply operation; common-mode range extends to VS− + 1.1 V. |
| 4 (VS−) | Negative supply rail | Accepts ground (single-supply) or negative voltage (dual-supply); decoupling required within 5 mm. |
| 5 (NC) | No internal connection | Unbonded pad; no electrical function; tie to ground or leave unconnected. |
| 6 (VS+) | Positive supply rail | Supports 2.7 V to 15 V single or ±1.35 V to ±7.5 V dual; PSRR = 75 dB minimizes supply noise coupling. |
| 7 (VOUT) | Amplifier output | Capable of sourcing/sinking 100 mA (typ), drives 499 Ω loads with <0.02 Ω output impedance at 1 MHz. |
| 8 (NC) | No internal connection | Unbonded pad; electrically isolated; recommended to connect to ground plane for thermal stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers >96% of full supply swing into 2 kΩ, preserving dynamic range for low-voltage ADC drivers. |
| Ultra-low harmonic distortion | −90 dBc HD2 and −100 dBc HD3 at 5 MHz enable clean signal reconstruction in 10+ bit data acquisition systems. |
| High output drive capability | 100 mA output current supports direct driving of multiple 75 Ω video lines or 499 Ω ADC inputs without buffering. |
| Broad supply voltage range | Operates from 2.7 V to 15 V single supply or ±1.35 V to ±7.5 V dual supply - simplifies mixed-voltage system integration. |
| Video-optimized AC performance | 0.007% differential gain and 0.007° differential phase meet SMPTE/ITU broadcast standards for composite video. |
Applications
| ADC Driver | Active Filtering |
|---|---|
Use Scenario: Driving the analog input of a 10–12-bit, 20–100 MSPS SAR or pipeline ADC in medical imaging or test equipment. IC Role / Device Role / Timing Role: High-fidelity buffer and gain stage ensuring full-scale signal transfer with minimal settling error and harmonic corruption. Use Value: 25 ns settling to 0.1% and −90 dBc HD2 prevent code-dependent distortion and maintain ENOB ≥ 10.5 bits. | Use Scenario: Implementing 2nd- to 4th-order anti-aliasing or reconstruction filters in digital audio or communications receivers. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate gain block in Sallen-Key or multiple-feedback topologies. Use Value: 230 MHz bandwidth allows stable filter design up to 20 MHz cutoff with <0.1 dB passband ripple. |
| Low-Voltage Video Signal Chain | High-Speed Signal Conditioning |
Use Scenario: Amplifying and level-shifting composite NTSC/PAL video signals in portable monitors or video capture dongles. IC Role / Device Role / Timing Role: DC-coupled video amplifier with precise gain and phase matching across luminance/chrominance bands. Use Value: 0.007% differential gain and 0.007° differential phase eliminate color bleeding and hue shift in real-time video streams. | Use Scenario: Conditioning fast pulse or burst-mode signals in laser ranging, time-of-flight sensors, or ultrasonic transceivers. IC Role / Device Role / Timing Role: Wideband gain stage preserving edge integrity and minimizing overshoot in transient-rich waveforms. Use Value: 975 V/µs slew rate ensures <1% linear rise-time error for 10 V steps under 10 ns duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA354AIDBVR | 250 MHz bandwidth, 150 V/µs slew rate, 6.5 nV/√Hz input noise - lower speed but lower noise and quiescent current (6.5 mA). | Better suited for battery-powered precision gain stages where speed < 100 MHz suffices. | Select OPA354AIDBVR when optimizing for power efficiency and noise over raw bandwidth. |
| THS4271DR | 1.4 GHz bandwidth, 900 V/µs slew rate, 3 nV/√Hz input noise - higher speed and lower noise, but 20 mA quiescent current and tighter layout sensitivity. | Targeted at RF IF amplification and >500 MSPS ADC drivers where THS4221DGK bandwidth is limiting. | Select THS4271DR only when system bandwidth demand exceeds 300 MHz and thermal/power budget permits. |
Compared with OPA354AIDBVR and THS4271DR, THS4221DGK occupies a balanced niche: it delivers 230 MHz bandwidth and ultra-low distortion at moderate 14 mA quiescent current, making it optimal for cost-sensitive, thermally constrained video and medium-speed data acquisition systems where neither ultra-low noise nor GHz-class speed is required.
Availability
THS4221DGK is available at Aetrix Electronics and suitable for ADC driver, active filtering, and low-voltage video signal chain applications requiring stable component supply, long-term industrial availability, and TI-qualified manufacturing traceability.
Supply support for THS4221DGK 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, embedded processing, and connectivity technologies with over 50 years of innovation in high-performance signal chain components.
The THS4221DGK belongs to TI's THS422x family of rail-to-rail output, low-distortion, high-speed op-amps designed specifically for demanding data converter interface, video signal conditioning, and wideband analog front-end applications.
FAQ
What is the maximum supply voltage rating for THS4221DGK?
The absolute maximum supply voltage for THS4221DGK is ±8.25 V (16.5 V total) across VS+ and VS− terminals. Operation beyond this risks permanent damage. Recommended operating range is ±1.35 V to ±7.5 V dual supply or 2.7 V to 15 V single supply, with 14 mA typical quiescent current at ±5 V. Always observe thermal derating above 85°C ambient.
Does THS4221DGK support single-supply operation?
Yes, THS4221DGK supports true single-supply operation from 2.7 V to 15 V. Its input common-mode range extends from VS− + 1.1 V to VS+ − 1.1 V, and rail-to-rail output delivers 0.1 V to 4.9 V swing into 2 kΩ at VS = 5 V. Biasing IN+ to mid-supply (e.g., 2.5 V) enables full-swing AC coupling without clipping.
What is the thermal pad connection requirement for THS4221DGK?
The THS4221DGK DGK package includes a PowerPAD™ thermal pad on the underside that must be soldered to a solid copper thermal plane on the PCB. Failure to do so limits power dissipation, risks junction temperature exceeding 125°C, and may cause parametric drift or permanent failure. TI recommends minimum 4×4 mm² exposed copper area with ≥4 thermal vias to inner ground planes.
How does THS4221DGK compare to THS4225DGK?
THS4221DGK is the non-power-down variant; THS4225DGK adds a dedicated power-down pin (PD) and reference pin (REF) enabling <1 mA shutdown current. Both share identical AC/DC specs, pinout (except PD/REF assignment), and package. THS4221DGK is preferred for always-on signal paths; THS4225DGK suits intermittent-use systems like portable instruments with duty-cycled amplification.
Can THS4221DGK drive a 75 Ω video load directly?
THS4221DGK can drive a 75 Ω load but requires careful thermal and stability design. At ±5 V, it sources/sinks 100 mA (min), supporting ~3.75 Vpp into 75 Ω. However, output voltage swing drops to ~±3.5 V, and power dissipation rises significantly. For sustained 75 Ω video driving, use series 49.9 Ω termination and 75 Ω cable match - a configuration validated in TI's THS422x video application notes.
THS4221DGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 990V/µs
- Gain Bandwidth Product:
- 120 MHz
- -3db Bandwidth:
- 230 MHz
- Current - Input Bias:
- 900 nA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 14mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 15 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
THS4221DGK FAQ
1.How can I place an order for THS4221DGK through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4221DGK 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 THS4221DGK reliable?
The price and inventory of THS4221DGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4221DGK is usually 5 days.
3.What payment methods are accepted for THS4221DGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4221DGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4221DGK?
THS4221DGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4221DGK 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 THS4221DGK?
For technical support, including THS4221DGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4221DGK requirements.
6.How does Aetrix verify that THS4221DGK is sourced from the original manufacturer or authorized distributors?
All THS4221DGK 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 THS4221DGK meets industry standards.
7.What is the process for return or replacement of THS4221DGK?
All THS4221DGK units undergo pre-shipment inspection (PSI). If there is an issue with THS4221DGK, 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 THS4221DGK part is unused and in its original packaging.
Return procedure for THS4221DGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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