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Texas Instruments OPA2171MDCUTEP
- Part No.:
- OPA2171MDCUTEP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
OPA2171MDCUTEP.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,766
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Product details
Overview
OPA2171MDCUTEP from Texas Instruments is a radiation-hardened, dual-channel, rail-to-rail output operational amplifier designed for precision analog signal conditioning in harsh environments. It operates from 2.7 V to 36 V (±1.35 V to ±18 V), delivers 3 MHz gain bandwidth, 14 nV/√Hz input voltage noise at 1 kHz, ±0.3 µV/°C offset drift (typ), and supports full rail-to-rail input operation down to 100 mV below V– and within 2 V of V+. It is used in defense-grade transducer amplifiers and temperature measurement front-ends.
For engineers reviewing the OPA2171MDCUTEP datasheet, OPA2171MDCUTEP pinout, OPA2171MDCUTEP application, or OPA2171MDCUTEP equivalent, this page provides verified specifications, validated pin functions, confirmed military-temperature-range performance (–55°C to +125°C), and real-world stability data for capacitive load drive up to 300 pF - critical for aerospace sensor interface and power module tracking designs.
Technical Context
The OPA2171MDCUTEP employs a proprietary CMOS input stage with RFI-filtered inputs and internal phase-reversal protection, enabling reliable operation when common-mode inputs exceed rails - a key differentiator versus standard op amps. Its dual-channel architecture shares identical electrical specs across channels, supporting matched gain stages in bridge or differential configurations.
It features low-input bias current (8 pA typ), high open-loop gain (130 dB typ), 120 dB CMRR (typ), and stable unity-gain operation with ≥45° phase margin into 300 pF loads when compensated with an isolation resistor (RISO). Quiescent current is 475 µA per amplifier, enabling low-power precision sensing in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 36 V (±1.35 V to ±18 V): Enables single-supply operation in 3.3 V, 5 V, 12 V, 24 V, and 36 V industrial and aerospace systems without level-shifting. |
| Gain Bandwidth Product | 3.0 MHz: Supports stable closed-loop gain ≥10 at 300 kHz or unity-gain buffering of signals up to ~1.5 MHz with adequate phase margin. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz: Enables low-noise amplification of microvolt-level signals from strain gauges and thermopiles without significant SNR degradation. |
| Offset Drift | ±0.3 µV/°C (typ): Ensures <1.8 µV total offset shift over –55°C to +125°C, critical for uncalibrated long-term temperature measurements. |
| Common-Mode Range | V– – 0.1 V to V+ – 2 V (normal); extends to V+ + 0.1 V (reduced performance): Allows direct interfacing to sensors operating beyond supply rails, e.g., grounded thermocouples. |
| Capacitive Load Drive | Stable up to 300 pF with RISO compensation: Permits direct driving of coaxial cables, ADC reference buffers, and MOSFET gates without external isolation networks. |
| Quiescent Current | 475 µA per amplifier (typ): Supports dual-channel precision amplification in space-constrained, low-power telemetry modules with minimal thermal impact. |
Pinout & Package
OPA2171MDCUTEP is housed in an 8-pin VSSOP (DCU) package measuring 2.30 mm × 2.00 mm, optimized for high-density PCB layouts in avionics and satellite payloads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts high-impedance sensor signals (e.g., thermistor divider) with 8 pA bias current; RFI filtering suppresses EMI in noisy power module environments. |
| –IN A (Pin 2) | Inverting input, Channel A | Used for precision gain-setting feedback networks; supports unity-gain buffer or inverting amplifier configurations with matched layout for low offset. |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail swing (within 30 mV of rails at 10 kΩ load) enables full dynamic range utilization in 3.3 V or 5 V ADC interfaces. |
| V– (Pin 4) | Negative supply | Reference node for dual-supply operation; also serves as ground reference in single-supply configurations with level-shifted inputs. |
| +IN B (Pin 5) | Noninverting input, Channel B | Duplicate of Pin 3; enables simultaneous amplification of two independent sensor channels (e.g., differential thermocouple + cold-junction compensation). |
| –IN B (Pin 6) | Inverting input, Channel B | Independent feedback path for Channel B; allows separate gain calibration per channel without crosstalk (channel separation >100 dB at DC). |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated output stage; supports dual-output configurations such as active filter stages or redundant signal paths. |
| V+ (Pin 8) | Positive supply | Accepts up to 36 V; internal protection enables safe operation during load-dump transients in vehicle power systems. |
Key Features
| Feature | Design Value |
|---|---|
| Radiation-hardened design | Qualified for extended product life cycle with controlled baseline, one assembly/test site, and traceability - meets MIL-PRF-38535 requirements for space and defense applications. |
| No phase reversal on overdrive | Input common-mode excursions beyond rails cause output limiting-not inversion-enabling robust operation in fault-tolerant power module tracking circuits. |
| RFI-filtered inputs | Integrated input filtering rejects >30 dB of RF interference at 900 MHz, eliminating need for external ferrites in EMC-critical avionics sensor nodes. |
| Extended temperature range | Specified from –55°C to +125°C with full parametric validation; eliminates derating calculations for high-reliability thermal management in sealed enclosures. |
| Low quiescent current | 475 µA per amplifier enables dual-channel precision amplification in battery-powered test equipment with >1000-hour runtime on AA cells. |
Applications
| Transducer Amplifier | Bridge Amplifier |
|---|---|
|
Use Scenario: Amplifying low-level mV outputs from load cells and pressure sensors in aircraft hydraulic monitoring systems. IC Role / Device Role / Timing Role: Dual-channel OPA2171MDCUTEP configures one channel as precision instrumentation amplifier front-end and second as reference buffer, maintaining matched gain and drift. Use Value: ±0.3 µV/°C drift ensures <0.02% FS error over flight temperature range; RFI filtering prevents false alarms from radar-induced coupling. |
Use Scenario: Signal conditioning for Wheatstone bridge sensors in missile guidance inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Single OPA2171MDCUTEP provides both differential amplification and rail-to-rail output buffering for ADC sampling at 100 kSPS. Use Value: 3 MHz GBW supports settling in <1 µs to 12-bit accuracy; 120 dB CMRR rejects common-mode noise from high-current motor drivers nearby. |
| Temperature Measurement | Power Module Tracking |
|
Use Scenario: Cold-junction compensation and linearization of Type-K thermocouples in satellite thermal control subsystems. IC Role / Device Role / Timing Role: Channel A amplifies thermocouple voltage; Channel B measures RTD resistance via constant-current source, enabling real-time CJC correction. Use Value: 8 pA input bias current prevents self-heating errors in high-impedance RTD bridges; –55°C to +125°C spec covers orbital thermal cycling. |
Use Scenario: Feedback amplification in point-of-load (POL) DC-DC converters for FPGA power rails in radar processing modules. IC Role / Device Role / Timing Role: Configured as unity-gain buffer between voltage divider and PWM controller, rejecting noise from switching node coupling. Use Value: Stable 300 pF drive capability eliminates need for external RC snubbers; rail-to-rail output ensures full 0–3.3 V feedback range for accurate regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2170MDGKR | Same architecture but commercial-grade (–40°C to +125°C); no radiation hardening or extended life-cycle controls. | Suitable for non-safety-critical industrial automation where cost is prioritized over TID tolerance and lot traceability. | Select OPA2170MDGKR only if radiation hardness, defense qualification, and –55°C operation are not required. |
| OPA2188AIDR | Zero-drift auto-zero topology; 0.03 µV/°C drift vs. 0.3 µV/°C; higher 1.2 µV max offset but 800 µA IQ vs. 475 µA. | Better for ultra-stable DC measurements (e.g., laboratory standards); less suitable for wideband sensor signal chains due to 1.2 MHz GBW. | Choose OPA2188AIDR when sub-µV/°C drift dominates system error budget; accept higher power and lower bandwidth. |
Compared with OPA2171MDCUTEP, OPA2170MDGKR lacks radiation tolerance and extended temperature validation, while OPA2188AIDR trades bandwidth and quiescent current for ultra-low drift - making OPA2171MDCUTEP optimal for wideband, low-power, high-reliability aerospace signal conditioning.
Availability
OPA2171MDCUTEP is available at Aetrix Electronics and suitable for defense electronics, satellite payload telemetry, and high-reliability industrial control systems requiring stable component supply across extended product lifecycles.
Supply support for OPA2171MDCUTEP 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 high-reliability aerospace and defense components.
The OPA2171MDCUTEP belongs to TI's Enhanced Product (EP) op amp family, engineered specifically for mission-critical applications demanding radiation tolerance, extended temperature operation, and controlled manufacturing baselines.
FAQ
What is the maximum capacitive load the OPA2171MDCUTEP can drive stably?
The OPA2171MDCUTEP is specified to operate stably with capacitive loads up to 300 pF when used with appropriate RISO compensation. This capability is validated in the datasheet's typical characteristics (Figures 23–24) and enables direct interfacing to cable shields, ADC reference inputs, and MOSFET gates without external isolation networks. Stability depends on proper PCB layout and decoupling - 0.1 µF ceramic capacitors placed near V+ and V– pins are mandatory.
Does the OPA2171MDCUTEP support true rail-to-rail input operation?
Yes - the OPA2171MDCUTEP supports input voltages from 100 mV below V– to within 2 V of V+ under normal operation, and extends to V+ + 0.1 V with reduced performance (per Table 2 in SBOS735). This full rail-to-rail input range allows direct connection to grounded sensors like thermocouples and bridge outputs without level-shifting circuitry, simplifying front-end design in space-constrained avionics modules.
What is the operating temperature range of the OPA2171MDCUTEP?
The OPA2171MDCUTEP is fully specified and tested from –55°C to +125°C, meeting MIL-PRF-38535 requirements for extended temperature operation. All key parameters - including offset voltage, CMRR, PSRR, and gain bandwidth - are guaranteed across this range, eliminating the need for derating or thermal modeling in satellite thermal control or engine-mounted industrial sensors.
How does the OPA2171MDCUTEP prevent phase reversal during input overvoltage?
The OPA2171MDCUTEP incorporates internal phase-reversal protection circuitry that forces the output to limit into the appropriate supply rail instead of inverting polarity when inputs exceed the common-mode range. This behavior is demonstrated in Figure 25 of SBOS735 and ensures predictable fault response in power module tracking amplifiers where transient overdrives are common - unlike conventional op amps that may latch or oscillate.
Is the OPA2171MDCUTEP pin-compatible with other devices in the OPA171/2171 family?
Yes - the OPA2171MDCUTEP shares identical pinout, footprint, and electrical specifications with the commercial OPA2171IDR and OPA2171AIDR in the same VSSOP-8 (DCU) package. This enables drop-in replacement in existing designs when upgrading to radiation-hardened, extended-temperature, and enhanced-product-qualified versions without PCB redesign.
OPA2171MDCUTEP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 475µA (x2 Channels)
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2171MDCUTEP FAQ
1.How can I place an order for OPA2171MDCUTEP through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2171MDCUTEP 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 OPA2171MDCUTEP reliable?
The price and inventory of OPA2171MDCUTEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2171MDCUTEP is usually 5 days.
3.What payment methods are accepted for OPA2171MDCUTEP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2171MDCUTEP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2171MDCUTEP?
OPA2171MDCUTEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2171MDCUTEP 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 OPA2171MDCUTEP?
For technical support, including OPA2171MDCUTEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2171MDCUTEP requirements.
6.How does Aetrix verify that OPA2171MDCUTEP is sourced from the original manufacturer or authorized distributors?
All OPA2171MDCUTEP 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 OPA2171MDCUTEP meets industry standards.
7.What is the process for return or replacement of OPA2171MDCUTEP?
All OPA2171MDCUTEP units undergo pre-shipment inspection (PSI). If there is an issue with OPA2171MDCUTEP, 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 OPA2171MDCUTEP part is unused and in its original packaging.
Return procedure for OPA2171MDCUTEP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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