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Texas Instruments OPA4172IPWR
- Part No.:
- OPA4172IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4172IPWR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,125
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Product details
Overview
OPA4172IPWR from Texas Instruments is a quad, rail-to-rail output, 36-V operational amplifier with JFET-input architecture, ±0.2 mV offset voltage, 10 MHz gain bandwidth, 7 nV/√Hz input voltage noise, and operation from ±2.25 V to ±18 V supplies. It serves as a precision signal-conditioning amplifier in high-voltage industrial sensor interfaces and bridge-based measurement systems.
For engineers reviewing the OPA4172IPWR datasheet, OPA4172IPWR pinout, OPA4172IPWR application, or OPA4172IPWR equivalent, key selection criteria include rail-to-rail output swing (≤90 mV from rail at 36 V), low input bias current (±8 pA), wide common-mode range (to within 2 V of V+), THD+N of 0.00005% at 1 kHz, and guaranteed operation from –40°C to +125°C.
Technical Context
The OPA4172IPWR employs a high-voltage CMOS process with JFET-input stages enabling ultra-low input bias current and excellent DC precision across its full ±2.25 V to ±18 V supply range. Its input stage operates 100 mV below V– and up to 2 V below V+, with full rail-to-rail output swing capability delivering >90% of supply voltage into 10 kΩ loads.
It features integrated EMI/RFI filtering on inputs, 120 dB common-mode rejection at DC, 104 dB PSRR, and stable unity-gain operation with capacitive loads up to 100 pF. The device maintains 10 MHz GBP and 10 V/µs slew rate across temperature and supply variations without requiring external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +4.5 V to +36 V (single-supply) or ±2.25 V to ±18 V - supports direct interfacing with industrial 24-V rails and legacy ±15-V systems |
| Offset Voltage | ±0.2 mV (typ) - enables sub-10 µV error in 50-mV full-scale transducer outputs without trimming |
| Gain Bandwidth | 10 MHz - supports closed-loop gains up to 100 with ≥100 kHz small-signal bandwidth |
| Input Bias Current | ±8 pA (typ) - minimizes voltage error across high-impedance sources like piezoelectric sensors or pH electrodes |
| Output Swing | Within 90 mV of rails (36 V, RL = 10 kΩ) - delivers true 0–35.91 V output range for maximum dynamic range in single-supply data acquisition |
| THD+N | 0.00005% at 1 kHz, 3.5 VRMS - meets Class A audio and high-fidelity test equipment requirements |
| Quiescent Current | 1.6 mA per amplifier - enables four-channel precision amplification at <6.5 mA total, suitable for power-constrained modules |
Pinout & Package
TSSOP-14 package (4.4 mm × 5.0 mm body, 0.65 mm pitch); thermally enhanced for industrial ambient operation up to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node (10¹³ Ω || 4 pF) accepting signals down to V– – 0.1 V; immune to phase reversal beyond rails |
| –IN A (Pin 2) | Inverting input, Channel A | Differential pair input referenced to +IN A; supports active filters and precision integrators with matched layout |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable (70–90 mV headroom), drives ≥10 kΩ load with <0.00005% THD+N at 1 kHz |
| V+ (Pin 14) | Positive supply | Accepts up to +36 V; powers all four amplifiers and internal bias circuitry; decoupling required within 10 mm |
| V– (Pin 7) | Negative supply | Accepts down to –18 V; reference for all input common-mode and output swing ranges; shared return path |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input identical to +IN A; enables dual-sensor differential measurement without cross-talk |
| –IN B (Pin 6) | Inverting input, Channel B | Matches –IN A electrical characteristics; supports matched gain configurations across channels |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated output stage; channel separation >100 dB at DC ensures <5 µV/V crosstalk between adjacent channels |
| +IN C (Pin 10) | Noninverting input, Channel C | Third independent input; validated for operation across full temperature range (–40°C to +125°C) |
| –IN C (Pin 9) | Inverting input, Channel C | Supports simultaneous multi-channel signal conditioning in compact space-constrained designs |
| OUT C (Pin 8) | Output, Channel C | Delivers same precision specs as OUT A/B; thermal coupling minimized via symmetrical die layout in TSSOP-14 |
| +IN D (Pin 12) | Noninverting input, Channel D | Fourth channel input; pin-compatible with SOIC-14 variant for drop-in upgrade paths in existing layouts |
| –IN D (Pin 13) | Inverting input, Channel D | Enables four independent instrumentation-grade amplifiers on one IC - reduces BOM count vs discrete solutions |
| OUT D (Pin 11) | Output, Channel D | Final output stage; specified for 75 mA short-circuit current and stable drive into 100 pF capacitive loads |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ≥99% of supply voltage range into 10 kΩ loads - eliminates need for level-shifting in single-supply DAQ front-ends |
| EMI/RFI filtered inputs | Integrated input-stage filtering rejects >60 dB of 900-MHz cellular interference - critical for factory-floor sensor nodes |
| Input range to within 2 V of V+ | Accepts signals up to (V+) – 2 V without clipping or phase reversal - enables direct connection to 24-V industrial sensors |
| Low 0.1-Hz to 10-Hz noise | 2.5 µVPP - supports high-resolution DC measurements in strain gauge and thermopile applications without chopper artifacts |
| Guaranteed operation to +125°C | Specified performance maintained over full industrial temperature range - no derating required for under-hood or motor-control use |
Applications
| Bridge Amplifier | Transducer Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying low-level differential output from a 350-Ω Wheatstone bridge in a pressure sensor module powered from 24-V industrial bus. IC Role / Device Role / Timing Role: Quad OPA4172IPWR configures two channels as matched instrumentation amps (INA) for bridge excitation and sensing, while remaining channels buffer reference and perform ratiometric correction. Use Value: ±0.2 mV offset and ±0.3 µV/°C drift ensure <0.05% FS error over –40°C to +85°C; rail-to-rail output maximizes ADC utilization. |
Use Scenario: Conditioning output from a high-impedance pH electrode (≥1 GΩ source) in an industrial water-quality analyzer. IC Role / Device Role / Timing Role: Single channel used in unity-gain buffer configuration; remaining three channels implement temperature compensation, calibration offset trim, and analog output driver. Use Value: ±8 pA input bias current prevents >1 mV error across 1-GΩ source; 7 nV/√Hz noise preserves resolution in 100-mV pH range. |
| Strain Gauge Amplifier | Precision Integrator |
|
Use Scenario: Four-channel amplification of micro-strain signals from bonded foil gauges on structural health monitoring hardware. IC Role / Device Role / Timing Role: All four OPA4172IPWR channels configured as synchronous differential amplifiers with matched external resistors for common-mode rejection >100 dB. Use Value: Channel separation >100 dB prevents crosstalk between adjacent gauges; 10 MHz GBP supports fast transient capture during impact testing. |
Use Scenario: Building a low-drift, low-noise integrator for charge accumulation in radiation detection circuits operating at +70°C ambient. IC Role / Device Role / Timing Role: One channel configured as integrator with metal-film feedback resistor and C0G capacitor; others provide reference buffering and reset control. Use Value: 2.5 µVPP 0.1–10 Hz noise and ±0.3 µV/°C drift enable stable integration over 10-second windows without baseline wander. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4182IPWR | Lower offset (±15 µV), lower noise (5.2 nV/√Hz), higher IQ (1.9 mA), same 10-MHz GBP and rail-to-rail output | Better suited for sub-16-bit precision systems where offset drift dominates error budget; less optimal for battery-powered multi-channel systems | Select OPA4182IPWR when offset and noise are primary constraints and supply current margin exists; OPA4172IPWR preferred for cost-sensitive industrial volume designs. |
| AD8604ARUZ | Lower supply range (2.7–6 V), higher offset (±65 µV), lower GBP (8 MHz), same quad TSSOP-14 package but not pin-compatible | Limited to low-voltage portable instrumentation; cannot replace OPA4172IPWR in 24-V industrial or ±15-V test equipment without redesign | Choose AD8604ARUZ only for battery-powered handheld meters; OPA4172IPWR remains necessary for high-voltage, high-precision, wide-temperature applications. |
Compared with OPA4182IPWR and AD8604ARUZ, the OPA4172IPWR uniquely balances 36-V operation, 10-MHz bandwidth, and 1.6-mA quiescent current per channel - making it the only quad op amp qualified for simultaneous high-voltage, high-speed, and low-power precision roles in industrial automation.
Availability
OPA4172IPWR is available at Aetrix Electronics and suitable for industrial sensor interfaces, precision data acquisition systems, and high-reliability motor control feedback loops requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA4172IPWR 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-precision op amp design and industrial-grade reliability validation.
The OPAx172 family was engineered specifically for high-voltage, low-drift, low-noise signal conditioning in harsh environments - targeting industrial automation, test equipment, and energy infrastructure applications demanding extended temperature and supply range operation.
FAQ
What is the maximum supply voltage rating for the OPA4172IPWR?
The OPA4172IPWR has an absolute maximum supply voltage rating of 40 V across V+ and V– pins. Its recommended operating range is +4.5 V to +36 V (single-supply) or ±2.25 V to ±18 V (dual-supply). Operation at 36 V is fully characterized for all parameters including output swing, THD+N, and quiescent current - making OPA4172IPWR suitable for direct use with standard 24-V industrial power rails plus safety margin.
Does the OPA4172IPWR support rail-to-rail input operation?
The OPA4172IPWR supports rail-to-rail output swing but not full rail-to-rail input. Its input common-mode range extends from (V–) – 0.1 V to (V+) – 2 V under normal operation. While the input can tolerate signals up to (V+) + 0.1 V, performance degrades within 2 V of V+. This architecture enables robust operation with 24-V sensors while maintaining low offset and drift - a deliberate trade-off optimized for industrial signal chains rather than generic rail-to-rail input.
How does the OPA4172IPWR handle capacitive loads?
The OPA4172IPWR is characterized for stable operation with capacitive loads up to 100 pF when driving 10-kΩ loads, as confirmed in Figure 23–24 of the SBOS618I datasheet. For heavier loads, TI recommends using an isolation resistor (e.g., 10–50 Ω) between the output and capacitance. This behavior stems from its optimized unity-gain stable compensation - eliminating need for external compensation networks in most sensor interface and DAC output buffer applications.
Is the OPA4172IPWR pin-compatible with other devices in the OPAx172 family?
The OPA4172IPWR in TSSOP-14 is pin-compatible with the SOIC-14 variant (OPA4172IPW) but not with OPA172 or OPA2172 due to differing channel counts and pinouts. Within the quad family, both packages share identical pin functions: Pins 1–3, 5–6, 8–14 map identically for +IN/–IN/OUT per channel and supplies. This allows direct PCB footprint reuse between TSSOP and SOIC versions for layout flexibility and thermal optimization.
What is the thermal resistance (RθJA) of the OPA4172IPWR in its TSSOP-14 package?
The OPA4172IPWR in PW (TSSOP-14) package has a junction-to-ambient thermal resistance (RθJA) of 111.1°C/W, as specified in Section 7.6 of the SBOS618I datasheet. This value assumes JEDEC-standard 2S2P board conditions. With a maximum junction temperature of +150°C and ambient up to +85°C, the device supports continuous 1.6-mA-per-amplifier operation without thermal derating - verified across –40°C to +125°C ambient in industrial convection-cooled enclosures.
OPA4172IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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:
- 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 (x4 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:
- 14-TSSOP
OPA4172IPWR FAQ
1.How can I place an order for OPA4172IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4172IPWR 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 OPA4172IPWR reliable?
The price and inventory of OPA4172IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4172IPWR is usually 5 days.
3.What payment methods are accepted for OPA4172IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4172IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4172IPWR?
OPA4172IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4172IPWR 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 OPA4172IPWR?
For technical support, including OPA4172IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4172IPWR requirements.
6.How does Aetrix verify that OPA4172IPWR is sourced from the original manufacturer or authorized distributors?
All OPA4172IPWR 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 OPA4172IPWR meets industry standards.
7.What is the process for return or replacement of OPA4172IPWR?
All OPA4172IPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4172IPWR, 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 OPA4172IPWR part is unused and in its original packaging.
Return procedure for OPA4172IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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