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Texas Instruments THS4221DGN
- Part No.:
- THS4221DGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4221DGN.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,910
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Product details
Overview
THS4221DGN from Texas Instruments is a single-channel, rail-to-rail output, high-speed voltage-feedback operational amplifier optimized for low-distortion signal conditioning in data converter interfaces and video systems. It delivers 230 MHz bandwidth (G = 1), 975 V/µs slew rate, −90 dBc HD2 at 5 MHz, ±4.8 V output swing into 2 kΩ, and operates from 3 V to 15 V supply rails.
For engineers reviewing the THS4221DGN datasheet, THS4221DGN pinout, THS4221DGN application, or THS4221DGN equivalent, key selection criteria include its rail-to-rail output drive capability, harmonic distortion performance at video frequencies, thermal behavior in MSOP-PowerPAD packaging, and compatibility with single-supply ADC driver topologies requiring fast settling and minimal gain error.
Technical Context
The THS4221DGN employs a voltage-feedback architecture with a fully differential input stage and a Class-AB rail-to-rail output stage capable of sourcing/sinking ≥100 mA. Its 230 MHz small-signal bandwidth and 975 V/µs slew rate enable accurate reproduction of fast transient signals without slewing-induced distortion.
Designed for wide supply flexibility (3–15 V), it maintains specified AC performance across dual (±1.35 to ±7.5 V) and single-supply (2.7–15 V) configurations. Input common-mode range extends to within 1.1 V of either rail, and output swing reaches within 0.2 V of each rail under light load-critical for maximizing dynamic range in 12-bit+ ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 230 MHz at G = 1 - supports >100 MSPS sampling with adequate closed-loop margin |
| Slew rate | 975 V/µs - enables full-scale step response in <2.6 ns for ±2.5 V output |
| HD2 / HD3 | −90 dBc / −100 dBc at 5 MHz, RL = 499 Ω - preserves SNR in baseband video and IF sampling |
| Rail-to-rail output | ±4.8 V swing into 2 kΩ - maximizes usable output headroom on ±5 V supplies |
| Supply range | 3 V to 15 V single or ±1.35 V to ±7.5 V dual - interoperable with LDOs, battery, and industrial rails |
| Quiescent current | 14 mA per channel - balances speed and power for portable and thermally constrained designs |
| Differential gain/phase | 0.007% / 0.007° at NTSC/PAL - meets broadcast-grade analog video linearity specs |
Pinout & Package
The THS4221DGN is housed in an 8-pin MSOP package with exposed PowerPAD (DGN-8), requiring thermal connection to PCB ground plane for rated power dissipation (1.71 W at TA ≤ 25°C). The PowerPAD improves thermal resistance (ΘJC = 4.7°C/W) and stabilizes junction temperature during sustained high-current output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unbonded pad; must be left floating or tied to ground per layout best practice |
| 2 (IN−) | Inverting input | High-impedance node (33 MΩ); requires matched trace length and guarding for optimal CMRR |
| 3 (IN+) | Non-inverting input | DC-biased reference point in single-supply configurations; sensitive to capacitive loading |
| 4 (VS−) | Negative supply rail | Return path for internal biasing; must be decoupled with 0.1 µF + 10 µF near package |
| 5 (NC) | No internal connection | Unbonded pad; no electrical function; may be used as thermal relief anchor |
| 6 (VS+) | Positive supply rail | Primary power input; connects to internal charge pumps and output stage drivers |
| 7 (VOUT) | Amplifier output | Capable of driving 499 Ω loads to ±4.7 V; requires series resistor for capacitive load isolation |
| 8 (NC) | No internal connection | Unbonded pad; not connected to die; avoid routing critical signals over this pin area |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full-scale analog output across entire supply range-enables maximum ADC utilization without level-shifting circuitry |
| Ultra-low harmonic distortion | −100 dBc third-harmonic at 5 MHz ensures clean spectral purity in undersampled IF receivers and composite video paths |
| High output current drive | 100 mA sourcing/sinking capability supports direct driving of 75 Ω video lines or multiple parallel ADC inputs |
| Wide supply voltage range | Operates from 3 V to 15 V-allows reuse across low-voltage portable and high-dynamic-range industrial signal chains |
| Excellent video specifications | 0.007% differential gain and 0.007° phase error meet SMPTE 253M and ITU-R BT.601 compliance thresholds |
Applications
| ADC Driver for High-Speed Data Acquisition | Composite Video Line Driver |
|---|---|
Use Scenario: Driving the input of a 12-bit, 100 MSPS pipeline ADC in a medical ultrasound digitizer where signal integrity below −90 dBc THD is required. IC Role / Device Role / Timing Role: Single-ended to differential conversion and gain staging amplifier with sub-25 ns 0.1% settling time. Use Value: Enables full ENOB preservation by maintaining −90 dBc HD2/HD3 at 5 MHz while delivering ±2.5 Vpp into 499 Ω load. | Use Scenario: Buffering and amplifying NTSC/PAL composite video signals before distribution to multiple monitors in broadcast equipment. IC Role / Device Role / Timing Role: Unity-gain video buffer with DC restoration and 75 Ω source termination. Use Value: Achieves 0.007% differential gain and 0.007° phase error-meeting SMPTE RP 168 specification for professional video routing. |
| Active Anti-Aliasing Filter Stage | Low-Voltage Signal Conditioning for Portable Test Equipment |
Use Scenario: Implementing a 5th-order elliptic active filter preceding a 16-bit SAR ADC in automated test equipment operating from ±5 V rails. IC Role / Device Role / Timing Role: High-fidelity gain block in filter feedback path with minimal group delay variation. Use Value: 230 MHz bandwidth ensures flat passband response up to 40 MHz (0.1 dB), preserving filter cutoff accuracy and stopband rejection. | Use Scenario: Amplifying sensor outputs (e.g., MEMS accelerometer) in battery-powered handheld oscilloscopes with 3.3 V single supply. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail I/O amplifier enabling full-scale use of 3.3 V ADC reference. Use Value: Delivers 0.15 V to 3.15 V output swing into 499 Ω at 3.3 V supply-maximizing dynamic range without external level shifters. |
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 GBW, 150 V/µs slew, 6.5 nV/√Hz input noise - lower speed but lower noise and quiescent current (6.5 mA) | Better suited for low-noise preamplification; less ideal for >50 MSPS ADC driving due to lower slew rate | Select when system prioritizes noise floor over full-power bandwidth and output drive |
| THS4271DR | 1.4 GHz bandwidth, 900 V/µs slew, 3 nV/√Hz noise - higher speed and lower noise, but 20 mA IQ and tighter layout sensitivity | Targeted at RF IF amplification and >200 MSPS sampling; requires stricter decoupling and grounding | Select when >500 MHz small-signal bandwidth and ultra-low noise are mandatory, and thermal budget allows |
Compared with OPA354AIDBVR and THS4271DR, the THS4221DGN occupies a balanced niche: it exceeds OPA354's slew rate and drive strength for demanding ADC interfaces, while offering lower quiescent current and more forgiving layout than THS4271-making it optimal for cost-sensitive, thermally constrained 100-MSPS-class systems.
Availability
THS4221DGN is available at Aetrix Electronics and suitable for high-speed data acquisition, broadcast video infrastructure, active filtering, and portable instrumentation requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for THS4221DGN 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-performance op-amps and precision signal chain solutions.
The THS4221DGN belongs to TI's THS422x family of rail-to-rail output, low-distortion, high-speed op-amps engineered specifically for driving high-resolution ADCs, video signal paths, and wideband active filters in industrial, medical, and communications equipment.
FAQ
What is the maximum output current capability of the THS4221DGN?
The THS4221DGN delivers a minimum of ±100 mA output current into 10 Ω loads under ±5 V supply conditions, enabling direct drive of 75 Ω video lines or parallel termination networks. This high drive strength is maintained across the full −40°C to +85°C operating temperature range, with typical values of ±92 mA at 70°C ambient.
Does the THS4221DGN support single-supply operation?
Yes, the THS4221DGN operates from a single 3 V to 15 V supply. At 3.3 V, it provides 0.15 V to 3.15 V output swing into 499 Ω, and at 5 V, it achieves 0.2 V to 4.8 V swing-making it suitable for low-voltage portable instrumentation and battery-powered signal conditioning without level-shifting circuitry.
What thermal considerations apply to the THS4221DGN's MSOP-PowerPAD package?
The THS4221DGN uses an 8-pin MSOP with exposed PowerPAD (DGN-8), which must be soldered to a thermally robust PCB copper plane to achieve rated power dissipation (1.71 W at TA ≤ 25°C). Without proper thermal connection, junction temperature can exceed 125°C-degrading distortion performance and long-term reliability. TI recommends following SLMA002/SLMA004 guidelines for PowerPAD layout.
How does the THS4221DGN perform in video applications like NTSC/PAL?
The THS4221DGN meets broadcast-grade video specifications: 0.007% differential gain and 0.007° differential phase error at NTSC/PAL frequencies with 150 Ω load. Its 40 MHz 0.1 dB flat bandwidth and ultra-low harmonic distortion ensure faithful reproduction of luminance/chrominance components without cross-color or cross-luminance artifacts.
Is the THS4221DGN pin-compatible with other devices in the THS422x family?
No-the THS4221DGN (single, non-power-down) uses a DGN-8 pinout with NC pins at positions 1, 5, and 8, whereas THS4225DGN (power-down variant) substitutes pin 5 with PD and pin 1 with REF. Direct substitution requires schematic and layout revision; THS4221DGN is not a drop-in replacement for THS4225DGN or dual-channel THS4222DGN.
THS4221DGN 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:
- 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-HVSSOP
THS4221DGN FAQ
1.How can I place an order for THS4221DGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4221DGN 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 THS4221DGN reliable?
The price and inventory of THS4221DGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4221DGN is usually 5 days.
3.What payment methods are accepted for THS4221DGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4221DGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4221DGN?
THS4221DGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4221DGN 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 THS4221DGN?
For technical support, including THS4221DGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4221DGN requirements.
6.How does Aetrix verify that THS4221DGN is sourced from the original manufacturer or authorized distributors?
All THS4221DGN 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 THS4221DGN meets industry standards.
7.What is the process for return or replacement of THS4221DGN?
All THS4221DGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4221DGN, 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 THS4221DGN part is unused and in its original packaging.
Return procedure for THS4221DGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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