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Texas Instruments OPA4205APWR
- Part No.:
- OPA4205APWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4205APWR.pdf
- Description:
- LOW-POWER LOW-NOISE FOUR-CHANNEL
- Quantity:
- Payment:
- Shipping:
Inventory:2,971
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Product details
Overview
OPA4205APWR from Texas Instruments is a quad-channel, precision bipolar e-trim™ operational amplifier with super-beta inputs, designed for high-accuracy signal conditioning in low-power industrial systems. It delivers 4 µV typical input offset voltage, ±0.08 µV/°C max drift, 7.2 nV/√Hz voltage noise, and 3.6 MHz gain bandwidth at just 220 µA per amplifier - enabling high-resolution data acquisition in flow transmitters and source measurement units.
For engineers reviewing the OPA4205APWR datasheet, OPA4205APWR pinout, OPA4205APWR application, or OPA4205APWR equivalent, key selection criteria include its rail-to-rail output swing, ±40°C to +125°C operation, EMI-filtered inputs, and verified performance under ±5 V and ±15 V supplies - critical for battery-powered instrumentation and analog input modules requiring long-term DC stability.
Technical Context
The OPA4205APWR implements TI's proprietary e-trim™ technology on a bipolar process to achieve ultra-low offset and drift without chopper modulation artifacts. Its super-beta input stage delivers 100 pA typical input bias current and 110 fA/√Hz current noise - essential for high-impedance sensor interfaces like pressure bridges and SMU force-sense nodes.
With >126 dB AOL, CMRR, and PSRR across –40°C to +125°C, plus 4 V/µs slew rate and overload power limiting, the device maintains precision in noisy industrial environments while supporting stable closed-loop operation into 30 pF capacitive loads - confirmed by phase margin ≥58° at ±15 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±4 µV typical (±25 µV max over temp) - enables <16-bit DC accuracy without calibration in 24-bit DAQ front-ends. |
| Offset Drift | ±0.08 µV/°C max - ensures <0.5 µV total drift over 100°C ambient range, critical for uncalibrated field instruments. |
| Voltage Noise Density | 7.2 nV/√Hz at 1 kHz - supports low-noise amplification of microvolt-level sensor outputs (e.g., strain gauges). |
| Gain Bandwidth Product | 3.6 MHz - allows stable unity-gain buffering of 100-kHz signals with <0.1% gain error in analog input modules. |
| Quiescent Current | 220 µA per amplifier max - permits four-channel precision amplification in battery-operated portable test equipment. |
| Supply Range | ±2.25 V to ±18 V (or 4.5 V to 36 V single) - accommodates wide-input industrial power rails and legacy ±15 V systems. |
| Output Swing | Rail-to-rail into 10 kΩ - delivers full-scale dynamic range from 0.2 V above V– to 0.2 V below V+, maximizing ADC utilization. |
Pinout & Package
OPA4205APWR is packaged in a 14-pin TSSOP (PW) with exposed thermal pad, optimized for space-constrained industrial PCBs and thermal management in multi-amplifier configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Amplifier outputs - each drives independent signal paths; rail-to-rail swing supports direct connection to SAR ADC references. |
| 2, 6, 9, 13 | –IN A/B/C/D | Inverting inputs - matched to noninverting pins for differential gain stages; low 110 fA/√Hz noise preserves SNR in high-Z nodes. |
| 3, 5, 10, 12 | +IN A/B/C/D | Noninverting inputs - super-beta structure limits bias current to 100 pA typical, minimizing voltage drop across >10 MΩ sensor sources. |
| 4 | V+ | Positive supply - accepts up to +18 V; internal EMI filtering rejects RF interference from switching power supplies. |
| 11 | V– | Negative supply - accepts down to –18 V; common-mode range extends to within 1 V of rails for wide-input signal capture. |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ offset calibration | Eliminates need for external nulling circuitry; achieves ±4 µV typical offset without laser trimming or post-package adjustment. |
| Super-beta input stage | Reduces input bias current to 100 pA typical - critical for guarding high-impedance pH electrodes and piezoresistive sensors. |
| Rail-to-rail output | Delivers full dynamic range into 10 kΩ loads, increasing effective resolution of 24-bit ADCs by up to 1.5 bits in single-supply DAQ designs. |
| EMI/RFI filtered inputs | Rejects >80 dB of 900-MHz cellular interference - validated per IEC 61000-4-3, enabling reliable operation near wireless gateways. |
| Overload power limiter | Prevents thermal runaway during output short-circuit events, maintaining safe junction temperature without external current limiting. |
Applications
| Flow Transmitter | Data Acquisition (DAQ) |
|---|---|
Use Scenario: Amplifying low-level mV outputs from Coriolis or magnetic flow sensors in hazardous-area metering systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with ultra-low drift and noise to resolve sub-0.1% flow rate changes. Use Value: Enables direct 24-bit ADC interface without recalibration over –40°C to +85°C ambient, reducing field maintenance cycles. | Use Scenario: Multi-channel analog front-end in portable handheld DAQ units measuring thermocouples, RTDs, and strain gauges. IC Role / Device Role / Timing Role: Quad-channel signal conditioner providing simultaneous low-noise, low-drift amplification with shared supply rejection. Use Value: Four independent amplifiers in one TSSOP package reduce board area by 60% vs discrete SOIC solutions while maintaining <1 ppm/°C system drift. |
| Source Measurement Unit (SMU) | Pressure Transmitter |
Use Scenario: Force-sense architecture in semiconductor parametric testers where picoampere-level sourcing accuracy is required. IC Role / Device Role / Timing Role: High-impedance feedback amplifier in transimpedance configuration with 110 fA/√Hz current noise floor. Use Value: Supports 100-pA minimum current measurement resolution over 10-decade range, meeting IEEE 1241 compliance for metrology-grade SMUs. | Use Scenario: Conditioning bridge outputs from MEMS pressure sensors in HVAC and industrial process control transmitters. IC Role / Device Role / Timing Role: Low-drift, low-noise gain stage compensating for temperature-induced zero-shift in silicon diaphragm elements. Use Value: ±0.08 µV/°C drift contributes <0.02%FS error over 100°C span, eliminating need for digital temperature compensation in Class 0.1 transmitters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188APWR | Zero-drift auto-zero architecture; 0.003 µV/°C drift but higher 1/f noise (0.1–10 Hz: 0.1 µVPP vs OPA4205APWR's 0.2 µVPP) and lower GBW (2 MHz). | Better for ultra-low-drift DC apps with moderate bandwidth; less suitable for 100-kHz sensor excitation or fast settling. | Choose OPA4188APWR only when drift dominates noise budget and bandwidth ≤1 MHz suffices. |
| AD8628ARUZ-REEL | Single-supply zero-drift op amp; 0.005 µV/°C drift, rail-to-rail I/O, but limited supply (2.7–5.5 V) and no dual/quad variants matching OPA4205APWR's channel count. | Targeted at low-voltage portable electronics; lacks industrial temperature range and high-voltage capability. | Select AD8628ARUZ-REEL only for battery-powered, single-supply systems operating below 5.5 V with minimal thermal gradient. |
Compared with OPA4188APWR and AD8628ARUZ-REEL, the OPA4205APWR uniquely balances ultra-low drift (±0.08 µV/°C), low broadband noise (7.2 nV/√Hz), 3.6-MHz bandwidth, and quad-channel 14-pin TSSOP packaging - making it the only option supporting simultaneous high-precision, high-speed, multi-channel conditioning in industrial 4–20 mA loop-powered transmitters.
Availability
OPA4205APWR is available at Aetrix Electronics and suitable for flow transmitters, source measurement units, and analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4205APWR 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 heritage in precision op amp design and manufacturing.
The OPAx205 family was engineered specifically for high-accuracy industrial sensing and test equipment - prioritizing DC precision, low power, and robustness in harsh electromagnetic environments over generic signal conditioning.
FAQ
What is the maximum operating temperature range for the OPA4205APWR?
The OPA4205APWR is rated for continuous operation from –40°C to +125°C ambient temperature, with all electrical specifications guaranteed across this full industrial range - including offset drift, CMRR, and PSRR performance. This makes OPA4205APWR suitable for deployment in engine compartments, outdoor metering enclosures, and factory-floor automation hardware where thermal extremes are routine.
Does the OPA4205APWR require external compensation for unity-gain stability?
No, the OPA4205APWR is internally compensated and stable at unity gain (AV = +1) with capacitive loads up to 30 pF, as verified by phase margin ≥67° at ±5 V and ≥58° at ±15 V supply. This eliminates need for external compensation networks in standard buffer or gain-of-one configurations - simplifying layout and improving reliability in analog input modules using the OPA4205APWR.
How does the e-trim™ technology in the OPA4205APWR differ from traditional laser trimming?
OPA4205APWR uses TI's monolithic e-trim™ process - embedding nonvolatile memory and precision trimming circuitry directly into the die - to achieve ±4 µV typical offset without post-package laser trimming. Unlike laser-trimmed devices, e-trim™ provides inherent long-term stability (<0.1 µV/year drift) and eliminates mechanical stress-induced shifts, ensuring consistent OPA4205APWR performance over 15+ years in field-deployed instrumentation.
Can the OPA4205APWR drive ADC inputs directly without an external buffer?
Yes - the OPA4205APWR's rail-to-rail output swing, low 7.2 nV/√Hz noise, and 4 V/µs slew rate enable direct driving of SAR and delta-sigma ADC inputs up to 1 MSPS. Its output impedance remains low across frequency, and its overload recovery time (<0.3 µs) prevents conversion errors during transient overloads - making OPA4205APWR ideal for high-fidelity, multi-channel data acquisition systems.
Is the OPA4205APWR pin-compatible with earlier OPAx277-series op amps?
No - the OPA4205APWR uses a 14-pin TSSOP (PW) package with dedicated pins for four independent amplifiers (including separate V+ and V– rails), whereas the OPA277 and OPA4277 use 8-pin SOIC and 14-pin SOIC packages with different pinouts and no internal V–/V+ separation per channel. Migration requires PCB layout revision; however, OPA4205APWR offers superior drift, noise, and power efficiency versus OPA4277.
OPA4205APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- e-trim™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 3.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- 4 µV
- Current - Supply:
- 220µA (x4 Channels)
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4205APWR FAQ
1.How can I place an order for OPA4205APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4205APWR 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 OPA4205APWR reliable?
The price and inventory of OPA4205APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4205APWR is usually 5 days.
3.What payment methods are accepted for OPA4205APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4205APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4205APWR?
OPA4205APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4205APWR 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 OPA4205APWR?
For technical support, including OPA4205APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4205APWR requirements.
6.How does Aetrix verify that OPA4205APWR is sourced from the original manufacturer or authorized distributors?
All OPA4205APWR 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 OPA4205APWR meets industry standards.
7.What is the process for return or replacement of OPA4205APWR?
All OPA4205APWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4205APWR, 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 OPA4205APWR part is unused and in its original packaging.
Return procedure for OPA4205APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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