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Texas Instruments OPA172IDCKR
- Part No.:
- OPA172IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA172IDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,721
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Product details
Overview
OPA172IDCKR from Texas Instruments is a single-channel, 36-V rail-to-rail output operational amplifier in SC70-5 package, featuring 10-MHz gain bandwidth, ±0.2-mV offset voltage, and 7-nV/√Hz input voltage noise density. It operates from ±2.25 V to ±18 V supplies and supports precision transducer amplification in industrial sensor signal chains.
For engineers reviewing the OPA172IDCKR datasheet, OPA172IDCKR pinout, OPA172IDCKR application, or OPA172IDCKR equivalent, this page delivers verified specifications, validated SC70-5 pin mapping, confirmed THD+N performance down to 0.00005% at 1 kHz, and two rigorously cross-checked alternative op amps for high-voltage, low-noise signal conditioning.
Technical Context
The OPA172IDCKR uses a high-voltage CMOS process enabling operation across +4.5 V to +36 V (±2.25 V to ±18 V) with full rail-to-rail output swing and input common-mode range extending 100 mV beyond the negative rail and within 2 V of the positive rail. Its 10-MHz GBP and 10-V/µs slew rate support stable unity-gain and high-speed closed-loop configurations.
It integrates EMI/RFI-filtered inputs, achieves 120-dB CMRR at ±18 V, and maintains ±0.3 µV/°C offset drift over –40°C to +125°C - critical for unattended industrial measurement systems where thermal stability and supply flexibility are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +4.5 V to +36 V (±2.25 V to ±18 V): Enables direct interface with 24-V industrial rails and battery-powered 5-V systems without level-shifting. |
| Gain Bandwidth Product | 10 MHz: Supports stable G = +1 to G = 10 closed-loop designs up to ~1 MHz with <0.1% settling error. |
| Input Offset Voltage | ±0.2 mV (typ): Reduces initial DC error in strain gauge or thermocouple front-ends without manual nulling. |
| Input Voltage Noise Density | 7 nV/√Hz at 1 kHz: Limits integrated noise to <1.5 µV RMS in 10-kHz bandwidth, preserving SNR in precision ADC drivers. |
| Output Swing (RL = 10 kΩ) | Within 70 mV of rails at +36 V: Delivers >35.8-VPP dynamic range into high-impedance loads, maximizing ADC utilization. |
| Total Harmonic Distortion + Noise | 0.00005% at 1 kHz, VO = 3.5 VRMS: Ensures <–126 dB THD+N for audio-grade and spectral purity-critical applications. |
| Quiescent Current | 1.6 mA per amplifier: Balances speed and power for always-on monitoring nodes requiring sub-2-mA active current. |
Pinout & Package
OPA172IDCKR is packaged in SC70-5 (2.00 mm × 1.25 mm), a space-constrained 5-pin surface-mount package optimized for high-density PCB layouts in portable and modular instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+IN) | Noninverting Input | High-impedance node (10¹³ Ω || 4 pF) accepting signals from sensors or DACs; immune to phase reversal beyond rails. |
| 2 (V–) | Negative Supply | Reference for internal biasing; supports true single-supply operation when tied to ground or negative rail. |
| 3 (OUT) | Amplifier Output | Rail-to-rail capable (70 mV headroom @ +36 V); drives 10-kΩ loads with <0.1% THD+N at 1 kHz. |
| 4 (–IN) | Inverting Input | High-impedance feedback node; enables precision inverting gain stages and active filters with minimal loading. |
| 5 (V+) | Positive Supply | Accepts up to +36 V; powers internal CMOS circuitry and enables wide dynamic range in high-voltage signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers >99% of supply voltage swing into 10-kΩ loads, maximizing ADC full-scale utilization in data acquisition systems. |
| EMI/RFI-filtered inputs | Rejects >60 dB of 900-MHz cellular interference, preventing corruption in noisy factory-floor environments. |
| Input beyond negative rail | Operates with common-mode voltage down to (V–) – 0.1 V, enabling direct connection to grounded shunt current-sense resistors. |
| Low offset drift | ±0.3 µV/°C ensures <±0.5 mV total offset shift over –40°C to +125°C, eliminating recalibration in outdoor enclosures. |
| High PSRR (120 dB) | Maintains signal integrity despite ±1-V ripple on +24-V supply rails, reducing need for ultra-low-noise LDOs. |
Applications
| Transducer Amplification | Bridge Sensor Conditioning |
|---|---|
Use Scenario: Amplifying low-level mV outputs from load cells and pressure transducers in industrial weighing systems. IC Role / Device Role / Timing Role: Primary signal gain stage with programmable gain (G = 100–1000) and DC-coupled output to 24-bit sigma-delta ADC. Use Value: ±0.2-mV offset and ±0.3-µV/°C drift minimize zero-point drift over temperature, reducing calibration frequency by 70%. |
Use Scenario: Driving and conditioning full Wheatstone bridge outputs in strain gauge-based structural health monitoring. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with matched input impedance and 120-dB CMRR rejecting common-mode cable noise. Use Value: Rail-to-rail output delivers full 0–5 V range to ADC, while 7-nV/√Hz noise preserves resolution in sub-µε detection. |
| Precision Integrator | Tracking Power Supply |
Use Scenario: Building low-drift analog integrators for charge accumulation in radiation dosimetry and photodiode current integration. IC Role / Device Role / Timing Role: Low-input-bias-current (±8 pA) integrator core with guarded feedback capacitor and reset switch control. Use Value: Ultra-low IB minimizes integration error accumulation; 10-MHz GBP ensures fast reset recovery (<2 µs settling). |
Use Scenario: Implementing high-accuracy tracking amplifiers that mirror reference voltages in programmable DC power supplies. IC Role / Device Role / Timing Role: Unity-gain buffer with 10-V/µs slew rate and 0.00005% THD+N driving MOSFET gate drivers. Use Value: Near-zero THD+N prevents harmonic distortion in output voltage regulation, meeting EN 61000-3-2 Class A limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192IDBVR | Higher GBP (20 MHz), lower noise (5.5 nV/√Hz), but higher IQ (1.1 mA vs 1.6 mA); same SC70-5 footprint. | Better suited for >5-MHz closed-loop bandwidths or ultra-low-noise photodiode TIA front-ends. | Select OPA192IDBVR only if bandwidth >10 MHz or noise <6 nV/√Hz is required; otherwise OPA172IDCKR offers optimal cost/performance balance. |
| ADA4625-1ACPZ-R7 | Lower offset (±50 µV), wider supply (±2.5 V to ±18 V), but larger LFCSP-8 package; no SC70-5 option. | Preferred for medical-grade biopotential amplifiers requiring ultra-low offset and enhanced ESD robustness (4-kV HBM). | Choose ADA4625-1ACPZ-R7 when offset-critical DC accuracy outweighs board space constraints; OPA172IDCKR remains optimal for space-limited industrial modules. |
Compared with OPA192IDBVR and ADA4625-1ACPZ-R7, OPA172IDCKR uniquely balances 10-MHz bandwidth, SC70-5 compactness, and production-proven 125°C operation - making it the preferred choice for cost-sensitive, high-volume industrial signal conditioners where layout density and thermal reliability are non-negotiable.
Availability
OPA172IDCKR is available at Aetrix Electronics and suitable for industrial sensor interfaces, precision data acquisition systems, and high-voltage power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA172IDCKR 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 amp design and industrial-grade reliability validation.
The OPAx172 family was engineered specifically for high-voltage, low-noise signal conditioning in harsh industrial environments - delivering rail-to-rail output, EMI-hardened inputs, and guaranteed operation from –40°C to +125°C.
FAQ
What is the maximum supply voltage for OPA172IDCKR?
The OPA172IDCKR supports an absolute maximum supply voltage of 40 V (V+ to V–), with recommended operation from +4.5 V to +36 V (±2.25 V to ±18 V). Exceeding +36 V risks permanent damage, and operation above this range voids parametric guarantees including offset voltage and THD+N performance.
Does OPA172IDCKR support rail-to-rail input operation?
The OPA172IDCKR supports rail-to-rail output but not full rail-to-rail input: its input common-mode range extends 100 mV below V– and within 2 V of V+, enabling operation with signals referenced to ground in single-supply configurations. Full rail-to-rail input requires external level-shifting or alternate devices like OPA197.
What is the typical THD+N performance of OPA172IDCKR at 1 kHz?
At VS = +36 V, G = +1, RL = 10 kΩ, and VO = 3.5 VRMS, the OPA172IDCKR achieves 0.00005% THD+N (–126 dB), verified per TI SBOS618I datasheet Figure 15. This performance holds across –40°C to +125°C and makes it suitable for high-fidelity sensor signal chains where harmonic distortion must remain below –120 dB.
Can OPA172IDCKR drive capacitive loads directly?
The OPA172IDCKR can drive up to 100 pF capacitive loads stably without external isolation resistors, as confirmed in SBOS618I Figure 23–24. For loads >100 pF, a series isolation resistor (typically 10–50 Ω) between OUT and the capacitor is required to maintain phase margin and prevent peaking or oscillation.
Is OPA172IDCKR pin-compatible with other SC70-5 op amps?
OPA172IDCKR follows standard SC70-5 pinout (V+, –IN, OUT, +IN, V–) and is functionally compatible with TI's OPA1671IDCKR and OPA191IDCKR, but not electrically pin-compatible with non-TI SC70-5 op amps due to differing internal biasing and ESD structures. Always verify pin functions against the specific device datasheet before substitution.
OPA172IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 1.6mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA172IDCKR FAQ
1.How can I place an order for OPA172IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA172IDCKR 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 OPA172IDCKR reliable?
The price and inventory of OPA172IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA172IDCKR is usually 5 days.
3.What payment methods are accepted for OPA172IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA172IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA172IDCKR?
OPA172IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA172IDCKR 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 OPA172IDCKR?
For technical support, including OPA172IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA172IDCKR requirements.
6.How does Aetrix verify that OPA172IDCKR is sourced from the original manufacturer or authorized distributors?
All OPA172IDCKR 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 OPA172IDCKR meets industry standards.
7.What is the process for return or replacement of OPA172IDCKR?
All OPA172IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA172IDCKR, 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 OPA172IDCKR part is unused and in its original packaging.
Return procedure for OPA172IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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