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Texas Instruments THS4221DBVT
- Part No.:
- THS4221DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
THS4221DBVT.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:268
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Product details
Overview
THS4221DBVT 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 - enabling high-fidelity analog front-end buffering for 12–14-bit ADC drivers.
For engineers reviewing the THS4221DBVT datasheet, THS4221DBVT pinout, THS4221DBVT application, or THS4221DBVT equivalent, key selection criteria include its 5-pin SOT-23 package, single-supply operation down to 3 V, rail-to-rail output swing, ultra-low harmonic distortion at video frequencies, and compatibility with precision DC-coupled gain stages requiring <0.01% differential gain error.
Technical Context
The THS4221DBVT implements a voltage-feedback architecture with a fully differential input stage and a Class-AB rail-to-rail output stage, supporting stable unity-gain operation without external compensation. Its internal biasing enables operation from ±1.35 V to ±7.5 V dual supplies or 2.7 V to 15 V single supply, with quiescent current tightly regulated at 12–14 mA per channel across temperature.
Unlike power-down variants (e.g., THS4225), the THS4221DBVT lacks a PD pin and reference input - it is a fixed-function, always-on amplifier. Its 13 nV/√Hz input voltage noise and 0.8 pA/√Hz current noise are optimized for wideband applications where SNR preservation is critical above 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (G=1) | 230 MHz - supports full-power signal fidelity up to ~65 MHz for ±2.5 Vpp outputs into 499 Ω. |
| Slew rate | 975 V/µs - ensures linear settling of fast transients without slewing-induced distortion in ADC driver paths. |
| HD2 / HD3 @ 5 MHz | −90 dBc / −100 dBc (RL = 499 Ω) - meets stringent SFDR requirements for 12-bit+ sampling at multi-MHz IFs. |
| Rail-to-rail output | ±4.8 V swing into 2 kΩ - maximizes dynamic range when driving ADC inputs referenced to mid-supply. |
| Supply range | 2.7 V to 15 V single supply - enables direct integration into 3.3 V and 5 V embedded systems without level-shifting. |
| Quiescent current | 14 mA typical (±5 V) - balances speed and power efficiency for portable or thermally constrained designs. |
| Differential gain/phase | 0.007% / 0.007° (NTSC/PAL, G = 2) - preserves color fidelity in composite video reconstruction and broadcast-grade signal chains. |
Pinout & Package
THS4221DBVT is housed in a 5-pin SOT-23 (DBV) package with exposed pad for thermal enhancement. Pin 1 is VOUT, Pin 2 is IN−, Pin 3 is IN+, Pin 4 is VS−, and Pin 5 is VS+. No internal connection exists on Pin 1 of the D/DGN/DGK variant - but DBV uses all five pins as functional terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Amplifier output | Delivers rail-to-rail voltage swing; requires local 0.1 µF decoupling to ground for stability at high frequencies. |
| 2 (IN−) | Inverting input | High-impedance node (33 MΩ); matched layout critical to minimize input offset drift from parasitic capacitance. |
| 3 (IN+) | Non-inverting input | DC-biased reference point in single-supply configurations; common-mode range extends to within 1.1 V of rails. |
| 4 (VS−) | Negative supply | Ground reference in single-supply use; must be connected to low-impedance plane to suppress PSRR degradation above 1 MHz. |
| 5 (VS+) | Positive supply | Accepts 2.7–15 V; requires 10 µF bulk + 0.1 µF ceramic decoupling adjacent to pin for >100 MHz transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Enables full utilization of ADC input range without level-shifting circuitry, reducing component count and board area. |
| 230 MHz bandwidth at G = 1 | Supports >100 MSPS sampling with minimal group delay variation across baseband spectrum. |
| Ultra-low harmonic distortion | −100 dBc third-harmonic at 5 MHz allows clean undersampling of IF signals in software-defined radio front ends. |
| Single-supply operation from 2.7 V | Eliminates need for negative rail generation in battery-powered instrumentation and portable test equipment. |
| 0.007% differential gain error | Meets SMPTE 253M specification for broadcast-quality video amplification without post-correction calibration. |
Applications
| ADC Driver for High-Speed Data Acquisition | Composite Video Signal Amplifier |
|---|---|
Use Scenario: Driving the analog input of a 12-bit, 100 MSPS pipeline ADC in an oscilloscope front end. IC Role / Device Role / Timing Role: Buffer and level-shift baseband sensor signal to match ADC's input common-mode range while preserving transient fidelity. Use Value: 975 V/µs slew rate prevents step-response overshoot; −100 dBc HD3 ensures >72 dB SFDR at 5 MHz input tone. | Use Scenario: Reconstructing NTSC/PAL composite video after DAC output in set-top box video processing path. IC Role / Device Role / Timing Role: Final-stage video buffer delivering 0.007° differential phase accuracy to maintain chroma timing integrity. Use Value: 0.007% differential gain and 40 MHz 0.1 dB flat bandwidth preserve luminance/chroma amplitude ratio across full video bandwidth. |
| Active Anti-Aliasing Filter Stage | Low-Voltage Precision Instrumentation Amplifier |
Use Scenario: Implementing a 2nd-order active low-pass filter before a 16-bit sigma-delta ADC in industrial sensor signal conditioning. IC Role / Device Role / Timing Role: High-speed, low-noise gain block with precise pole placement enabled by 230 MHz GBW and low input capacitance (1 pF). Use Value: 13 nV/√Hz input voltage noise contributes <0.5 µV RMS integrated noise over 100 kHz bandwidth, preserving ENOB. | Use Scenario: Amplifying microvolt-level thermocouple outputs in a 3.3 V portable data logger with no external op-amp biasing. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail I/O amplifier operating from 3.3 V with input common-mode range extending to 0.15 V above ground. Use Value: 3 mV max input offset and ±20 µV/°C drift ensure <10 µV total error over 0°C–70°C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, rail-to-rail output amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA354AIDBVR | 250 MHz bandwidth, 150 V/µs slew rate, 6.5 nV/√Hz noise - lower speed but superior noise performance. | Better suited for low-noise preamplifier stages preceding gain blocks; less ideal for full-power ADC driving due to lower slew rate. | Select OPA354AIDBVR when system SNR dominates over transient fidelity; THS4221DBVT preferred for >50 MSPS sampling. |
| THS4271DR | 1.4 GHz bandwidth, 900 V/µs slew rate, 3 nV/√Hz noise - higher speed and lower noise, but consumes 22 mA and requires careful layout. | Targeted at RF IF amplification and ultra-wideband applications beyond 100 MHz; over-spec'd for video or medium-speed ADC use. | Choose THS4271DR only when >500 MHz small-signal BW is required; THS4221DBVT offers optimal balance for 10–100 MHz video/data converter roles. |
Compared with OPA354AIDBVR and THS4271DR, the THS4221DBVT provides the most cost-effective and thermally efficient solution for applications demanding 200+ MHz bandwidth, sub-0.01% video linearity, and rail-to-rail output swing at ≤14 mA quiescent current - making it ideal for space-constrained, high-fidelity analog signal chains.
Availability
THS4221DBVT is available at Aetrix Electronics and suitable for high-speed data acquisition, broadcast video signal conditioning, and precision instrumentation requiring stable component supply and guaranteed long-term sourcing.
Supply support for THS4221DBVT 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 data converter interface solutions.
The THS4221DBVT belongs to TI's THS422x family of rail-to-rail output, low-distortion, high-speed op-amps designed specifically for driving precision ADCs, reconstructing video signals, and enabling wideband active filtering in compact, low-voltage systems.
FAQ
What is the maximum supply voltage rating for THS4221DBVT?
The THS4221DBVT has an absolute maximum supply voltage of ±8.25 V (16.5 V total) across VS+ and VS−. Operation beyond this risks permanent damage. The recommended operating range is ±1.35 V to ±7.5 V dual supply or 2.7 V to 15 V single supply. At ±7.5 V, output swing remains rail-to-rail into ≥2 kΩ loads, and quiescent current stays within 22 mA limit.
Does THS4221DBVT support single-supply operation below 3.3 V?
Yes, THS4221DBVT operates down to 2.7 V single supply (VS+ = 2.7 V, VS− = GND). At 3.3 V, it delivers 0.15 V to 3.15 V output swing into 499 Ω and maintains 200 MHz bandwidth. Input common-mode range is 1.0 V to 2.3 V, requiring proper DC biasing of IN+ for signal integrity. THS4221DBVT is not specified for 1.8 V operation.
What is the thermal resistance (θJA) of the THS4221DBVT DBV package?
The THS4221DBVT in the 5-pin SOT-23 (DBV) package has a junction-to-ambient thermal resistance (θJA) of 255.4°C/W under JEDEC High-K test board conditions. With a maximum junction temperature of 125°C and 14 mA quiescent current at ±5 V, power dissipation is ~140 mW - resulting in ~36°C rise above ambient. Adequate copper pour under the exposed pad is strongly recommended to reduce thermal impedance.
Can THS4221DBVT drive a 50 Ω coaxial cable directly?
No, THS4221DBVT is not designed for direct 50 Ω cable driving. Its output current capability is rated for ≥10 Ω loads (±100 mA), but sustained 50 Ω loading causes excessive power dissipation and degrades distortion performance. For 50 Ω interface, use a series 49.9 Ω resistor at the output (source termination) with THS4221DBVT driving into high-Z receiver - preserving bandwidth and minimizing reflections.
Is there a power-down version of THS4221DBVT?
No, THS4221DBVT does not include power-down functionality. It is the base single-channel variant without PD or REF pins. The THS4225DBVT is the functionally identical part with added power-down control (Pin 1 = PD, Pin 2 = REF), enabling <1 mA shutdown current. THS4221DBVT remains active whenever powered - appropriate for always-on signal paths where latency and enable sequencing are not required.
THS4221DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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:
- -
- 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:
- SOT-23-5
THS4221DBVT FAQ
1.How can I place an order for THS4221DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4221DBVT 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 THS4221DBVT reliable?
The price and inventory of THS4221DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4221DBVT is usually 5 days.
3.What payment methods are accepted for THS4221DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4221DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4221DBVT?
THS4221DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4221DBVT 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 THS4221DBVT?
For technical support, including THS4221DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4221DBVT requirements.
6.How does Aetrix verify that THS4221DBVT is sourced from the original manufacturer or authorized distributors?
All THS4221DBVT 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 THS4221DBVT meets industry standards.
7.What is the process for return or replacement of THS4221DBVT?
All THS4221DBVT units undergo pre-shipment inspection (PSI). If there is an issue with THS4221DBVT, 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 THS4221DBVT part is unused and in its original packaging.
Return procedure for THS4221DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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