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Texas Instruments OPA453FAKTWT
- Part No.:
- OPA453FAKTWT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
OPA453FAKTWT.pdf
- Description:
- IC OPAMP GP 1 CIRC DDPAK/TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:123
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Product details
Overview
OPA453FAKTWT from Texas Instruments is a high-voltage, high-current operational amplifier optimized for closed-loop gains ≥5, delivering 7.5MHz gain-bandwidth product, ±50mA continuous output drive, and ±40V supply capability. It features thermal shutdown with flag output, rail-to-rail input common-mode range (V– +5V to V+ –0.5V), and operates across –40°C to +125°C junction temperature. It is used in precision transducer drivers requiring stable high-output swing under capacitive loads.
For engineers reviewing the OPA453FAKTWT datasheet, OPA453FAKTWT pinout, OPA453FAKTWT application, or OPA453FAKTWT equivalent, key selection criteria include minimum stable gain (≥5), slew rate (+23/–38 V/µs), thermal flag functionality, DDPAK-7 surface-mount package constraints, and safe operating area limitations at high VS–VO.
Technical Context
The OPA453FAKTWT employs a compensated internal architecture that ensures stability only at closed-loop gains of 5 or greater - unlike the unity-gain-stable OPA452. Its dominant-pole compensation is tuned for wide bandwidth (7.5MHz GBW) and high slew rate, achieved via optimized internal current sources and output stage biasing.
It integrates dual protection circuits: current-limiting (±125mA short-circuit) and thermal shutdown (trip at +160°C, reset at +145°C), with a dedicated Flag pin sourcing 100–165µA during shutdown. The DDPAK-7 package ties the exposed tab electrically to V–, requiring isolation from signal ground when mounted on copper pour.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7.5 MHz - enables stable amplification up to 1.5MHz at G = 5 without external compensation |
| Slew Rate | +23 / –38 V/µs - supports fast large-signal settling (1µs to 0.1% for 10V step at G = 5) |
| Output Current | ±50 mA continuous - drives low-impedance loads (e.g., 600Ω at ±30V) without external boost |
| Supply Voltage Range | ±10 V to ±40 V (80 V total) - accommodates asymmetric rails (e.g., +70V/–10V) while maintaining specs |
| Input Offset Voltage | ±1 mV (typ), ±6 mV (max over temp) - laser-trimmed for precision DC-coupled servo and piezo positioning |
| Thermal Shutdown Flag | 100–165 µA sink during shutdown - provides logic-level interface (e.g., to MCU GPIO) without external pull-up |
| Common-Mode Range | V– +5 V to V+ –0.5 V - accepts inputs within 5V of negative rail, critical for single-supply transducer interfaces |
Pinout & Package
OPA453FAKTWT uses a 7-lead DDPAK (TO-263) surface-mount package with exposed thermal tab electrically connected to V–. The tab must be soldered to PCB copper for thermal management but isolated from signal ground if V– is not grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect terminal | Internally unconnected; must remain floating - no routing or grounding allowed |
| 2 (V–) | Negative supply input | Primary return path; tab is internally bonded to this pin - requires low-impedance thermal pad connection |
| 3 (VO) | Amplifier output | Capable of ±50mA continuous drive into resistive or reactive loads; limited by SOA at high VS–VO |
| 4 (V+) | Positive supply input | Bypass with ≥0.1µF ceramic capacitor near pin; voltage rating must exceed applied V+ |
| 5 (VIN–) | Inverting input | Differential pair input with 10¹³ Ω || 6 pF common-mode impedance; clamped ±0.5V beyond rails |
| 6 (VIN+) | Non-inverting input | Matches VIN– in offset, noise, and CMRR; requires matched trace lengths in high-precision layouts |
| 7 (Flag) | Thermal shutdown status output | Open-collector current source: ~50nA normal, 100–165µA during shutdown - interfaces directly to CMOS/HCT logic |
Key Features
| Feature | Design Value |
|---|---|
| Minimum Stable Gain | G ≥ 5 - eliminates need for external compensation in high-gain servo and test equipment amplifiers |
| Thermal Protection with Flag Output | Flag pin sinks 140µA (typ) during shutdown - enables real-time system fault detection without additional sensors |
| Wide Supply Range Operation | Specified performance maintained across ±10V to ±40V - simplifies design for variable-voltage industrial power stages |
| Rail-Compatible Input Stage | Input common-mode extends to V– +5V - supports direct interfacing with ground-referenced sensors and DAC outputs |
| Robust Output Short-Circuit Handling | ±125mA current limit - prevents latch-up during transient faults while preserving long-term reliability |
Applications
| Piezoelectric Actuator Driver | High-Voltage Test Equipment Amplifier |
|---|---|
Use Scenario: Driving stacked piezo elements requiring ±30V, 20kHz bandwidth, and sub-mV offset stability in closed-loop nanopositioning systems. IC Role / Device Role / Timing Role: High-voltage output buffer with precision DC gain control and thermal fault monitoring via Flag pin. Use Value: Delivers full 30Vp-p swing at 20kHz with <0.0008% THD+N, while Flag alerts controller before thermal derating affects positioning accuracy. |
Use Scenario: Output stage of automated test equipment generating calibrated ±25V signals into 600Ω loads with programmable gain and fault logging. IC Role / Device Role / Timing Role: Final gain stage with integrated current limiting and thermal flag for self-diagnostics during burn-in testing. Use Value: Eliminates external current-sense and thermal monitoring circuitry; ±50mA drive meets IEEE 1149.4 compliance requirements for analog boundary scan. |
| Audio Power Driver (Class-G) | Servo Motor Gate Driver Interface |
Use Scenario: High-fidelity headphone amplifier stage delivering ±20V into 32Ω loads with ultra-low distortion and DC-coupled input. IC Role / Device Role / Timing Role: Low-noise, high-slew output driver with rail-to-rail input enabling true DC-coupled audio paths. Use Value: 21 nV/√Hz input voltage noise and +23V/µs slew rate preserve transient response; Flag pin disables downstream protection relays on overtemperature. |
Use Scenario: Isolated gate driver interface translating ±10V control signals to IGBT/MOSFET gates in industrial servo inverters. IC Role / Device Role / Timing Role: Level-shifting buffer with fast overload recovery (<1µs) and thermal fault signaling for safety-critical motion control. Use Value: 1µs overload recovery time prevents false triggering of motor stall detection; Flag output synchronizes with PLC safety logic for Category 3 stop functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA452FAKTWT | Unity-gain stable; 1.8MHz GBW; lower slew rate (+7.2/–10 V/µs) | Suitable for G = 1–4 configurations (e.g., voltage followers, integrators) where bandwidth <2MHz suffices | Select when gain <5 is required and thermal flag functionality remains essential |
| OPA547T | Programmable current limit (10mA–500mA); disable pin; wider SOA; 1.6MHz GBW | Designed for programmable current-source applications (e.g., LED drivers, lab supplies) rather than precision voltage amplification | Choose when adjustable current limiting or output disable is mandatory, accepting reduced bandwidth and higher quiescent current |
Compared with OPA453FAKTWT, OPA452FAKTWT supports lower gains but sacrifices bandwidth and slew rate, while OPA547T trades off precision AC performance for flexible current control - making OPA453FAKTWT optimal for fixed high-gain, high-speed voltage amplification with thermal visibility.
Availability
OPA453FAKTWT is available at Aetrix Electronics and suitable for piezoelectric actuator drivers, high-voltage test equipment amplifiers, and servo motor gate driver interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA453FAKTWT 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 precision amplifiers and high-reliability power solutions.
The OPA45x series was designed specifically for high-voltage, high-current industrial and test instrumentation applications demanding robust protection, wide temperature operation, and guaranteed specifications across full supply ranges.
FAQ
What is the minimum closed-loop gain required for stable operation of the OPA453FAKTWT?
The OPA453FAKTWT is internally compensated for stable operation only at closed-loop gains of 5 or greater. Attempting to use it at G < 5 (e.g., unity gain or G = 2) will cause peaking, oscillation, or excessive overshoot unless external compensation is applied per Figure 9 in the datasheet. This differs from the OPA452FAKTWT, which is unity-gain stable. Always verify stability with actual load and layout using small-signal step response measurements.
How does the Flag pin on the OPA453FAKTWT function, and what external circuitry is needed?
The Flag pin on the OPA453FAKTWT is an open-collector current source that sinks ~50nA during normal operation and 100–165µA when thermal shutdown activates. No external pull-up is required for CMOS logic interfacing: a 19.1kΩ resistor to +5V yields >3.5V logic high under minimum flag current, satisfying HCT/CMOS VIH thresholds. For microcontroller GPIO monitoring, connect Flag directly to an input with internal pull-up enabled, and configure the pin for interrupt-on-change detection.
Can the OPA453FAKTWT be used with asymmetric power supplies, and what are the limits?
Yes, the OPA453FAKTWT supports asymmetric supplies - e.g., +70V and –10V - as long as the total differential supply voltage remains ≤80V and each rail stays within ±10V to ±40V relative to local ground. Input common-mode range extends to V– +5V, so with –10V V–, inputs may go as low as –5V. Output swing is referenced to the actual supply rails: VO can reach within 4V of V+ and V– at ±50mA, meaning usable output span is (V+ – 4V) – (V– + 4V) = VS – 8V.
What thermal management is required for the OPA453FAKTWT in a 7.5W dissipation scenario?
At 7.5W dissipation with ambient at +40°C, the OPA453FAKTWT's junction temperature would exceed +125°C without heatsinking - since its θJC is 3°C/W and typical θCA for a 2-inch² 1oz copper pad is ~40°C/W. To maintain TJ ≤ +125°C, total θJA must be ≤ (125 – 40)/7.5 = 11.3°C/W. This requires a dedicated surface-mount heatsink (e.g., Aavid 57800 series) or forced airflow. Never rely solely on PCB copper; always verify TJ with IR thermography or thermocouple under worst-case load and signal conditions.
Is the exposed tab on the OPA453FAKTWT electrically isolated, and how should it be connected?
No, the exposed tab on the OPA453FAKTWT is electrically connected to the V– pin (Pin 2). It must be soldered to a PCB copper pour tied to the V– net - never to ground or any other potential. Using the tab as a thermal path while referencing it to V– avoids ground loops and ensures accurate current-limiting behavior. If V– is not at ground potential, the copper pour must be fully isolated from chassis or signal ground planes using clearance gaps ≥0.5mm per IPC-2221.
OPA453FAKTWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 38V/µs
- Gain Bandwidth Product:
- 7.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 5.5mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 20 V
- Voltage - Supply Span (Max):
- 80 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-7)
OPA453FAKTWT FAQ
1.How can I place an order for OPA453FAKTWT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA453FAKTWT 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 OPA453FAKTWT reliable?
The price and inventory of OPA453FAKTWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA453FAKTWT is usually 5 days.
3.What payment methods are accepted for OPA453FAKTWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA453FAKTWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA453FAKTWT?
OPA453FAKTWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA453FAKTWT 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 OPA453FAKTWT?
For technical support, including OPA453FAKTWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA453FAKTWT requirements.
6.How does Aetrix verify that OPA453FAKTWT is sourced from the original manufacturer or authorized distributors?
All OPA453FAKTWT 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 OPA453FAKTWT meets industry standards.
7.What is the process for return or replacement of OPA453FAKTWT?
All OPA453FAKTWT units undergo pre-shipment inspection (PSI). If there is an issue with OPA453FAKTWT, 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 OPA453FAKTWT part is unused and in its original packaging.
Return procedure for OPA453FAKTWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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