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Texas Instruments OPA2172ID
- Part No.:
- OPA2172ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2172ID.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:847
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Product details
Overview
OPA2172ID from Texas Instruments is a dual, rail-to-rail output, 36-V CMOS operational amplifier with 10-MHz gain bandwidth, ±0.2-mV offset voltage, and 7-nV/√Hz input voltage noise density-designed for precision signal conditioning in industrial power modules and transducer interfaces.
For engineers reviewing the OPA2172ID datasheet, OPA2172ID pinout, OPA2172ID application, or OPA2172ID equivalent, this page delivers verified specifications, SOIC-8 package details, dual-channel functional context, thermal performance metrics, and real-world implementation guidance for high-voltage, low-noise analog front-ends.
Technical Context
The OPA2172ID employs a high-voltage CMOS input stage enabling rail-to-rail input operation down to 100 mV below V– and within 2 V of V+, with no phase reversal on overdrive. Its unity-gain-stable architecture supports fast settling (2 µs to 0.1%) and 10-V/µs slew rate under ±18-V supplies.
It features EMI/RFI-filtered inputs, 120-dB CMRR at DC, and 1.6-mA per amplifier quiescent current-optimized for single-supply systems requiring wide dynamic range, low distortion (<0.00005% THD+N at 1 kHz), and stable operation across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +4.5 V to +36 V (±2.25 V to ±18 V); enables direct interface with industrial 24-V rails and legacy ±15-V systems |
| Gain Bandwidth | 10 MHz; supports stable closed-loop gain ≥10 at 1 MHz for anti-aliasing and active filtering |
| Input Offset Voltage | ±0.2 mV (typ); reduces DC error in strain gauge and bridge amplifier configurations without trimming |
| Input Voltage Noise | 7 nV/√Hz @ 1 kHz; preserves SNR in low-level sensor signal chains (e.g., thermocouples, RTDs) |
| Output Swing | 70 mV from rail @ RL = 10 kΩ, VS = +36 V; delivers >34-V peak-to-peak swing into high-Z loads |
| Quiescent Current | 1.6 mA per amplifier; balances speed and power in always-on monitoring circuits |
| CMRR | 120 dB (typ, VS = ±18 V); rejects common-mode interference in noisy factory environments |
Pinout & Package
OPA2172ID is supplied in an industry-standard SOIC-8 (D) package measuring 4.90 mm × 3.91 mm, with exposed pad not present and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; drives loads up to ±75 mA short-circuit current; rail-to-rail capable |
| 2 | –IN A | Inverting input, channel A; accepts signals from V– – 0.1 V to V+ – 2 V; EMI-filtered |
| 3 | +IN A | Noninverting input, channel A; matched to –IN A for <1.5-µV/°C drift over temperature |
| 4 | V– | Negative supply terminal; reference for both amplifiers; supports true single-supply operation |
| 5 | +IN B | Noninverting input, channel B; electrically isolated from channel A; enables dual-path signal processing |
| 6 | –IN B | Inverting input, channel B; identical input bias current (±8 pA typ) to channel A |
| 7 | OUT B | Amplifier B output; independent output stage; allows differential drive or dual feedback paths |
| 8 | V+ | Positive supply terminal; supports up to 40-V absolute max; powers both amplifiers simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers >98% of full supply range into 10-kΩ loads-critical for maximizing ADC dynamic range in 36-V systems |
| No phase reversal on overdrive | Input signals exceeding V+ by 100 mV do not invert output polarity-ensures safe operation in fault-prone power monitoring |
| EMI/RFI filtered inputs | Integrated RF suppression maintains accuracy in motor-drive or switching-power-supply proximity |
| Low input bias current | ±8 pA typical enables high-impedance sensor interfacing (e.g., pH electrodes, piezoelectric transducers) without guard traces |
| Wide temperature range | Specified from –40°C to +125°C-qualified for under-hood automotive and industrial control cabinet deployment |
Applications
| Tracking Amplifier in Power Modules | Transducer Amplifier |
|---|---|
Use Scenario: Closed-loop voltage/current tracking in 24-V merchant power supplies with fast transient response requirements. IC Role / Device Role / Timing Role: Dual op-amp configuration: one channel as error amplifier, second as current-sense buffer with matched gain. Use Value: 10-MHz GBP and 10-V/µs slew rate enable sub-µs regulation loop stability; rail-to-rail output ensures full DAC utilization. |
Use Scenario: Signal conditioning for resistive bridge sensors (e.g., load cells, pressure transducers) in factory automation. IC Role / Device Role / Timing Role: Instrumentation-grade amplifier with matched input pairs and ultra-low offset drift (±0.3 µV/°C). Use Value: ±0.2-mV offset minimizes zero-error calibration burden; 120-dB CMRR rejects common-mode noise from shared 24-V bus. |
| Bridge Amplifier | Temperature Measurement |
Use Scenario: High-side and low-side differential amplification of Wheatstone bridge outputs in precision weighing systems. IC Role / Device Role / Timing Role: Dual-channel configuration provides independent gain stages for excitation and sensing paths. Use Value: Input range extending to V– – 0.1 V accommodates negative bridge outputs; low THD+N (0.00005%) preserves resolution in 24-bit ADC systems. |
Use Scenario: Linearization and amplification of RTD or thermistor signals in HVAC and process control terminals. IC Role / Device Role / Timing Role: Precision voltage follower and programmable-gain stage with low thermal EMF inputs. Use Value: 7-nV/√Hz noise density prevents degradation of microvolt-level ΔV across 100-Ω Pt100 elements; 1.6-mA IQ enables battery-backed operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-voltage op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182IDR | Lower offset (±4 µV), lower noise (5.7 nV/√Hz), but 2-MHz GBP and higher IQ (700 µA per amp) | Better DC precision; unsuitable for >200-kHz closed-loop bandwidths or low-power portable designs | Select OPA2182IDR only when sub-µV offset dominates over speed and power constraints |
| AD8638ARZ-REEL | Wider offset drift (±2 µV/°C), higher noise (12 nV/√Hz), but same 10-MHz GBP and SOIC-8 footprint | Higher thermal error in unregulated enclosures; less suitable for high-accuracy temperature-critical measurement | Choose AD8638ARZ-REEL where cost sensitivity outweighs drift and noise requirements |
Compared with OPA2172ID, OPA2182IDR trades bandwidth and power efficiency for ultra-low offset, while AD8638ARZ-REEL matches speed and package but sacrifices drift and noise performance-making OPA2172ID the balanced choice for industrial signal chains demanding speed, precision, and robustness.
Availability
OPA2172ID is available at Aetrix Electronics and suitable for industrial power modules, transducer interfaces, bridge amplifiers, and temperature measurement systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA2172ID 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 op-amps and high-reliability industrial ICs.
The OPAx172 family-including OPA2172ID-is engineered for high-voltage, low-noise signal conditioning in harsh environments, targeting applications like power supply monitoring, sensor front-ends, and test equipment where rail-to-rail operation and EMI resilience are critical.
FAQ
What is the maximum supply voltage rating for the OPA2172ID?
The OPA2172ID has an absolute maximum supply voltage rating of 40 V (V+ – V–), with recommended operating range from +4.5 V to +36 V (±2.25 V to ±18 V). Operation beyond 36 V is not guaranteed and may impact reliability or parametric performance. Always observe derating guidelines in TI's SBOS618I datasheet for long-term stability.
Does the OPA2172ID support true rail-to-rail input operation?
The OPA2172ID supports input voltages from 100 mV below V– up to 2 V below V+ under normal operation. It can tolerate inputs up to V+ + 0.1 V without phase reversal, but performance (e.g., CMRR, offset) degrades within 2 V of V+. For full rail-to-rail input capability, external level-shifting or clamping is required.
What is the thermal resistance (RθJA) of the OPA2172ID in SOIC-8 package?
The OPA2172ID in SOIC-8 (D) package has a junction-to-ambient thermal resistance (RθJA) of 116.1°C/W, measured per JEDEC JESD51-2 standards on a 2-layer PCB with 1-in² copper. This value assumes standard layout practices; actual thermal performance improves with added copper pour or thermal vias.
Can the OPA2172ID drive capacitive loads directly?
The OPA2172ID is not unity-gain stable into heavy capacitive loads. Driving >100 pF requires isolation resistors (e.g., 10–100 Ω in series with output) or feedback network compensation. Figure 23–24 in the SBOS618I datasheet shows overshoot vs. capacitive load; stability must be validated per application layout and load profile.
Is the OPA2172ID pin-compatible with other dual op-amps in SOIC-8?
The OPA2172ID uses standard SOIC-8 pinout (pin 1 = OUT A, pin 2 = –IN A, pin 3 = +IN A, pin 4 = V–, pin 5 = +IN B, pin 6 = –IN B, pin 7 = OUT B, pin 8 = V+), matching industry conventions. However, electrical characteristics (e.g., bandwidth, noise, supply range) differ significantly from legacy parts like LM258 or TL082-functional substitution requires full circuit validation.
OPA2172ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 Channels)
- Current - Output / Channel:
- 75 mA
- 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:
- 8-SOIC
OPA2172ID FAQ
1.How can I place an order for OPA2172ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2172ID 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 OPA2172ID reliable?
The price and inventory of OPA2172ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2172ID is usually 5 days.
3.What payment methods are accepted for OPA2172ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2172ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2172ID?
OPA2172ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2172ID 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 OPA2172ID?
For technical support, including OPA2172ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2172ID requirements.
6.How does Aetrix verify that OPA2172ID is sourced from the original manufacturer or authorized distributors?
All OPA2172ID 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 OPA2172ID meets industry standards.
7.What is the process for return or replacement of OPA2172ID?
All OPA2172ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2172ID, 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 OPA2172ID part is unused and in its original packaging.
Return procedure for OPA2172ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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