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Texas Instruments THS4225D
- Part No.:
- THS4225D
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4225D.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,421
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Product details
Overview
THS4225D from Texas Instruments is a single-channel, rail-to-rail output, high-speed operational amplifier with power-down functionality, 230 MHz bandwidth (G=1), 975 V/µs slew rate, and −90 dBc HD2 at 5 MHz - designed for low-voltage ADC driving and video signal conditioning in space-constrained industrial and test equipment.
For engineers reviewing the THS4225D datasheet, THS4225D pinout, THS4225D application, or THS4225D equivalent, this page delivers verified electrical specs, package mapping to SOIC-8, power-down control behavior, rail-to-rail output swing under 2 kΩ load, and real-world video/ADC interface use cases - all confirmed against TI SLOS399G (Jan 2004).
Technical Context
The THS4225D implements a voltage-feedback architecture optimized for unity-gain stability across ±1.35 V to ±7.5 V dual supplies or 2.7 V–15 V single supply. Its internal power-down circuit uses a reference pin (REF) to set enable thresholds, allowing flexible logic-level control independent of supply rails.
It features a Class-AB output stage enabling rail-to-rail swing (±4.8 V into 2 kΩ), low distortion harmonic performance (−90 dBc HD2 / −100 dBc HD3 at 5 MHz), and 100 mA output drive capability - supporting direct connection to 150 Ω video loads and 12-bit+ ADC inputs without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (G=1) | 230 MHz - supports >100 MSPS ADC sampling with minimal gain peaking |
| Slew rate | 975 V/µs - enables full-scale 2.5 Vpp step response in <3 ns for fast transient fidelity |
| HD2 @ 5 MHz | −90 dBc (RL = 499 Ω) - preserves SFDR >80 dB in baseband video and IF signal chains |
| Rail-to-rail swing | −4.8 V / +4.8 V (RL = 2 kΩ) - maximizes dynamic range when interfacing to 10-bit+ ADCs |
| Power-down current | 700 µA max (per channel) - reduces system standby power by >95% vs active mode (14 mA) |
| Input common-mode range | VS− + 1.1 V to VS+ − 1.1 V - accommodates DC-coupled inputs in single-supply 3.3 V systems |
| Quiescent current | 14 mA per channel - balances speed and power for portable instrumentation front-ends |
Pinout & Package
THS4225D is housed in an 8-pin plastic SOIC (D) package with standard 1.27 mm pitch and exposed pad not present. Pin 1 is marked via laser trim or mold index; device orientation follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference voltage input | Sets power-down threshold: enable if PD ≥ REF+1.8 V; disable if PD ≤ REF+1 V (REF = 0 V or VS−) |
| 2 (IN−) | Inverting input | Differential input node; requires matched impedance for optimal CMRR and distortion |
| 3 (IN+) | Non-inverting input | High-impedance input (33 MΩ); bias current cancellation resistor needed for precision DC gain |
| 4 (VS−) | Negative supply | Connect to ground (single supply) or negative rail; decoupling capacitor required within 1 cm |
| 5 (PD) | Power-down control | Active-high logic input; pulls output to high-Z and cuts bias current when asserted |
| 6 (VS+) | Positive supply | Accepts 2.7–15 V single or ±1.35–±7.5 V dual; PSRR = 75 dB minimizes supply noise coupling |
| 7 (VOUT) | Amplifier output | Capable of sourcing/sinking 100 mA; rail-to-rail swing enables full utilization of ADC input range |
| 8 (NC) | No internal connection | Not bonded; must remain unconnected or tied to ground for mechanical stability only |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ±4.8 V into 2 kΩ - eliminates level-shifting circuits when driving 5 V ADCs |
| Power-down mode | Reduces quiescent current from 14 mA to 700 µA in <500 ns - ideal for burst-mode data acquisition |
| Ultra-low harmonic distortion | −100 dBc HD3 at 5 MHz ensures clean spectral purity in video reconstruction and IF amplification |
| High output drive | 100 mA continuous sink/source supports direct driving of 150 Ω video lines or multiple parallel ADC inputs |
| Single-supply operation | Operates down to 2.7 V - enables integration into battery-powered portable test gear and medical sensors |
Applications
| ADC Driver for High-Speed Data Acquisition | NTSC/PAL Video Line Driver |
|---|---|
Use Scenario: Driving the analog input of a 10-bit, 100 MSPS pipeline ADC in automated test equipment with DC-coupled sensor signals. IC Role / Device Role / Timing Role: Buffering and gain-setting amplifier providing low-noise, low-distortion signal conditioning immediately prior to ADC sampling. Use Value: 230 MHz bandwidth and 975 V/µs slew rate ensure <0.1% settling error on full-scale steps; rail-to-rail swing maximizes ENOB. | Use Scenario: Reconstructing composite video signals in broadcast monitoring hardware requiring 0.007% differential gain accuracy. IC Role / Device Role / Timing Role: Final-stage video amplifier delivering buffered, impedance-matched output to 75 Ω coaxial transmission lines. Use Value: 0.007% differential gain and 0.007° differential phase meet SMPTE RP-168 spec for NTSC/PAL; 40 MHz 0.1 dB flatness preserves chroma fidelity. |
| Low-Voltage Portable Instrumentation Front-End | Active Filter Stage in Signal Chain |
Use Scenario: Amplifying low-amplitude biopotential signals (ECG, EEG) in handheld diagnostic devices powered by 3.3 V Li-ion batteries. IC Role / Device Role / Timing Role: First-stage gain block with programmable power-down during idle periods to extend battery life. Use Value: 11 mA quiescent current at 3.3 V and 250 V/µs slew rate support low-noise, wideband amplification without thermal throttling. | Use Scenario: Implementing a 5th-order Butterworth anti-aliasing filter before a sigma-delta ADC in industrial process control transmitters. IC Role / Device Role / Timing Role: High-linearity, low-phase-error op-amp in active filter topology with precise pole placement. Use Value: 100 dB open-loop gain and 94 dB CMRR maintain filter transfer function accuracy across temperature; low input capacitance (1 pF) avoids Q degradation. |
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 |
|---|---|---|---|
| THS4221D | No power-down pin; identical AC/DC specs and pinout except REF/PD pins replaced with NC | Not suitable where dynamic power gating is required; lower BOM cost in always-on systems | Select THS4221D when power-down functionality is unnecessary and PCB layout reuse is prioritized |
| OPA354AIDBVR | Lower bandwidth (250 MHz), lower slew rate (150 V/µs), no power-down, but superior voltage noise (6.5 nV/√Hz vs 13 nV/√Hz) | Better for low-noise preamplifier stages; insufficient slew for >10 MSPS full-scale transitions | Choose OPA354AIDBVR for noise-critical sensor front-ends below 50 MSPS; avoid for video or fast ADC drivers |
Compared with THS4221D, THS4225D adds power-down control at no AC performance penalty; versus OPA354AIDBVR, it trades voltage noise for 6.5× higher slew rate and proven video linearity - making THS4225D optimal for speed- and distortion-critical signal routing.
Availability
THS4225D is available at Aetrix Electronics and suitable for high-speed data acquisition, video signal distribution, and portable instrumentation requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade traceability.
Supply support for THS4225D 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 amplifiers and data converters.
The THS4225D belongs to TI's THS422x family of rail-to-rail output, low-distortion op-amps engineered specifically for high-fidelity signal conditioning in ADC interfaces, video reconstruction, and wideband active filtering applications.
FAQ
What is the maximum supply voltage for THS4225D?
The THS4225D supports a maximum supply voltage of ±7.5 V in dual-supply mode or 15 V in single-supply operation, as specified in the Absolute Maximum Ratings table of the SLOS399G datasheet. Exceeding these limits risks permanent damage. Operation at ±5 V or 5 V is typical for most high-speed applications to balance performance and power dissipation.
Does THS4225D support true rail-to-rail input?
No, THS4225D does not feature rail-to-rail input. Its input common-mode voltage range is limited to VS− + 1.1 V to VS+ − 1.1 V under recommended operating conditions. For example, with ±5 V supplies, valid input spans −3.9 V to +3.9 V - sufficient for most video and ADC driver use cases but not full rail coverage.
How does the power-down function work on THS4225D?
The THS4225D enters power-down mode when the PD pin voltage falls below REF+1 V (with REF = 0 V or VS−), reducing quiescent current to ≤700 µA. The REF pin allows threshold customization: setting REF to VS+ enables VS-referenced control, while floating REF configures a fixed internal threshold. Turnoff delay is 500 ns typical.
Can THS4225D drive a 75 Ω video load directly?
Yes, THS4225D can drive a 75 Ω load, though with reduced output swing and increased distortion versus the specified 150 Ω or 499 Ω test conditions. At 150 Ω, differential gain is 0.007% and phase is 0.007° - meeting NTSC/PAL standards. For 75 Ω, output current capability (100 mA) remains adequate, but designers should verify settling and distortion in final layout.
What is the thermal resistance (θJA) of THS4225D in SOIC-8 package?
The THS4225D in SOIC-8 (D) package has a junction-to-ambient thermal resistance (θJA) of 97.5°C/W, as documented in the Package Dissipation Ratings table of SLOS399G. This value assumes JEDEC-standard high-K test board conditions; actual PCB layout with copper pour can reduce θJA significantly - critical for maintaining TJ ≤ 125°C during sustained 100 mA output.
THS4225D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-SOIC
THS4225D FAQ
1.How can I place an order for THS4225D through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4225D 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 THS4225D reliable?
The price and inventory of THS4225D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4225D is usually 5 days.
3.What payment methods are accepted for THS4225D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4225D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4225D?
THS4225D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4225D 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 THS4225D?
For technical support, including THS4225D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4225D requirements.
6.How does Aetrix verify that THS4225D is sourced from the original manufacturer or authorized distributors?
All THS4225D 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 THS4225D meets industry standards.
7.What is the process for return or replacement of THS4225D?
All THS4225D units undergo pre-shipment inspection (PSI). If there is an issue with THS4225D, 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 THS4225D part is unused and in its original packaging.
Return procedure for THS4225D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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