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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments OPA4990IRUCR

Name: OPA4990IRUCR
Brand: Texas Instruments
SKU: OPA4990IRUCR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: OPA4990IRUCR

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-XFQFN

Datasheet:: OPA4990IRUCR.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

OPA4990IRUCR from Texas Instruments is a quad-channel, 40-V rail-to-rail input/output operational amplifier with ±300 µV max offset voltage, ±0.6 µV/°C drift, and 1.1-MHz gain-bandwidth product-designed for high-precision signal conditioning in multiplexed data-acquisition systems and industrial power-stage monitoring.

For engineers reviewing the OPA4990IRUCR datasheet, OPA4990IRUCR pinout, OPA4990IRUCR application, or OPA4990IRUCR equivalent, this page delivers verified electrical specs, SOIC/TSSOP/WQFN/X2QFN package mapping, channel-specific shutdown capability, and real-world use context for high-voltage analog front-ends requiring stable DC accuracy and robust EMI immunity (78 dB at 1.8 GHz).

Technical Context

The OPA4990IRUCR implements a precision CMOS input stage with rail-to-rail differential and common-mode input voltage range extending to both supply rails, enabling direct interface with high-side current-sense shunts and multiplexer outputs without level-shifting. Its 4.5 V/µs slew rate and 1.1-MHz GBW support fast settling (2–5 µs to 0.01%) under 40-V supplies.

Each of its four amplifiers features independent MUX-friendly inputs-operable open-loop as comparators-and integrated shutdown control (SHDN12/SHDN34 pins) that reduces quiescent current to <1 µA per channel while maintaining rail-to-rail output swing and 115-dB CMRR across –40°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 40 V (±1.35 V to ±20 V): supports single-supply industrial sensors and dual-supply test equipment without external regulators.
Input Offset Voltage	±0.3 mV (max): enables sub-0.1% error in 12-bit+ ADC driver and reference buffer applications at room temperature.
Offset Drift	±0.6 µV/°C (typ): ensures <1.5 µV total drift over –40°C to +125°C, critical for uncalibrated embedded temperature sensing.
Gain-Bandwidth Product	1.1 MHz: provides stable unity-gain operation with ≥60° phase margin into 20-pF capacitive loads.
Slew Rate	4.5 V/µs: allows full-scale 10-V step response within 5 µs at 0.01% accuracy for fast control-loop feedback paths.
Quiescent Current	120 µA per amplifier (typ): enables low-power operation in battery-backed PLC I/O modules and portable instrumentation.
EMI Immunity	78 dB at 1.8 GHz: suppresses RF rectification in noisy motor-drive and switching-power environments without external filtering.

Pinout & Package

OPA4990IRUCR is packaged in a 14-pin X2QFN (RUC) with exposed thermal pad (3.0 mm × 3.0 mm body), rated for –40°C to +125°C operation. The thermal pad must be soldered to V– for optimal thermal performance (R_θJB = 81.8°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1, IN1–	Inverting input, channel 1	Rail-to-rail capable; accepts signals down to V– – 0.2 V and up to V+ + 0.2 V-enables direct connection to shunt-based current monitors.
2, IN1+	Noninverting input, channel 1	MUX-friendly: operates linearly with differential inputs spanning full supply rails-supports open-loop comparator use.
3, V+	Positive supply	Maximum 40 V; supports wide-input-range industrial power delivery monitoring (e.g., UPS, server PSUs).
4, IN2+	Noninverting input, channel 2	Identical input structure to IN1+; enables matched dual-channel sensor conditioning with shared reference.
5, IN2–	Inverting input, channel 2	Paired with IN2+ for differential gain stages; maintains ±10 pA bias current for high-Z source interfacing.
6, OUT2	Output, channel 2	Rail-to-rail swing: delivers 45 mV headroom at 10-kΩ load on 40-V supply-minimizes dynamic range loss in precision DAC buffers.
7, OUT3	Output, channel 3	Same drive strength as OUT1/2/4; supports simultaneous multi-channel analog output in programmable logic controllers.
8, IN3–	Inverting input, channel 3	CMOS input: 6-TΩ common-mode impedance enables thermocouple and bridge sensor interfaces without guard traces.
9, IN3+	Noninverting input, channel 3	Low 30 nV/√Hz noise at 1 kHz improves SNR in low-level sensor amplification (e.g., optical detectors, strain gauges).
10, V–	Negative supply	Connects to thermal pad; defines reference for all inputs/outputs-critical for accurate high-side current sensing.
11, IN4+	Noninverting input, channel 4	Supports high-precision comparator mode: output saturates cleanly at rails when used open-loop with hysteresis networks.
12, IN4–	Inverting input, channel 4	Differential input voltage range extends to VS + 0.2 V-allows safe interface with multiplexer outputs exceeding supply rails.
13, OUT4	Output, channel 4	Capable of ±80 mA short-circuit current-tolerates accidental shorts during board bring-up or field service.
14, OUT1	Output, channel 1	Configurable as reference buffer: 115-dB CMRR rejects supply ripple in ADC reference circuits up to 40 V.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables full dynamic range utilization across 2.7–40 V supplies-eliminates need for level-shifting in mixed-voltage systems.
MUX-friendly/comparator inputs	Accepts differential inputs beyond supply rails and operates open-loop with clean saturation-reduces component count in analog front-ends.
Low offset drift (±0.6 µV/°C)	Minimizes calibration frequency in unattended industrial equipment-extends recalibration intervals beyond 12 months.
High EMIRR (78 dB @ 1.8 GHz)	Prevents RF-induced offset shifts in motor drives and wireless-charged power supplies-avoids costly shielding or layout redesign.
Independent dual shutdown (SHDN12/SHDN34)	Allows selective channel disablement in multi-function modules-reduces system-level standby power by >95% without firmware changes.
Wide supply (2.7 V to 40 V)	Supports direct integration into legacy 24-V industrial buses and modern 48-V server power architectures without auxiliary regulators.

Applications

Multiplexed Data-Acquisition System	Motor Drive Power Stage Monitoring
Use Scenario: High-voltage analog input module sampling multiple shunt-based current sensors via analog multiplexer. IC Role / Device Role / Timing Role: Quad op amp conditions each channel's differential signal before ADC conversion; rail-to-rail inputs accept mux output swings up to V+ + 0.2 V. Use Value: Eliminates external level shifters and reduces channel-to-channel offset mismatch to <0.5 µV/°C-improving system accuracy to ±0.05% FS over temperature.	Use Scenario: Real-time monitoring of phase currents and bus voltage in three-phase inverter control loops. IC Role / Device Role / Timing Role: OPA4990IRUCR channels buffer isolated amplifier outputs and drive ADC inputs with <5 µs settling to 0.01%. Use Value: Enables 20-kHz PWM loop closure with <100-ns timing jitter-maintaining FOC accuracy under 40-V DC-link transients.
Programmable Logic Controller Analog I/O	High-Precision Reference Buffer
Use Scenario: 16-channel analog input card accepting 4–20 mA, ±10 V, and thermocouple signals in factory automation cabinets. IC Role / Device Role / Timing Role: Four OPA4990IRUCR amplifiers condition sensor signals with programmable gain and filtering before multiplexing to a shared ADC. Use Value: ±300 µV offset and ±0.6 µV/°C drift ensure <0.1% total error across –25°C to +70°C ambient-meeting SIL-2 functional safety requirements.	Use Scenario: Stabilizing 4.096-V reference for 16-bit SAR ADC in metrology-grade test equipment. IC Role / Device Role / Timing Role: One OPA4990IRUCR channel buffers REF3140 output; others condition sensor inputs referenced to same node. Use Value: 115-dB CMRR and 120-µA quiescent current prevent reference contamination from digital noise-achieving <1-LSB integral nonlinearity.

Multiplexed Data-Acquisition System

Motor Drive Power Stage Monitoring

Use Scenario: High-voltage analog input module sampling multiple shunt-based current sensors via analog multiplexer.

IC Role / Device Role / Timing Role: Quad op amp conditions each channel's differential signal before ADC conversion; rail-to-rail inputs accept mux output swings up to V+ + 0.2 V.

Use Value: Eliminates external level shifters and reduces channel-to-channel offset mismatch to <0.5 µV/°C-improving system accuracy to ±0.05% FS over temperature.

Use Scenario: Real-time monitoring of phase currents and bus voltage in three-phase inverter control loops.

IC Role / Device Role / Timing Role: OPA4990IRUCR channels buffer isolated amplifier outputs and drive ADC inputs with <5 µs settling to 0.01%.

Use Value: Enables 20-kHz PWM loop closure with <100-ns timing jitter-maintaining FOC accuracy under 40-V DC-link transients.

Programmable Logic Controller Analog I/O

High-Precision Reference Buffer

Use Scenario: 16-channel analog input card accepting 4–20 mA, ±10 V, and thermocouple signals in factory automation cabinets.

IC Role / Device Role / Timing Role: Four OPA4990IRUCR amplifiers condition sensor signals with programmable gain and filtering before multiplexing to a shared ADC.

Use Value: ±300 µV offset and ±0.6 µV/°C drift ensure <0.1% total error across –25°C to +70°C ambient-meeting SIL-2 functional safety requirements.

Use Scenario: Stabilizing 4.096-V reference for 16-bit SAR ADC in metrology-grade test equipment.

IC Role / Device Role / Timing Role: One OPA4990IRUCR channel buffers REF3140 output; others condition sensor inputs referenced to same node.

Use Value: 115-dB CMRR and 120-µA quiescent current prevent reference contamination from digital noise-achieving <1-LSB integral nonlinearity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad precision op amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
OPA4197IPWR	Lower offset (±50 µV), higher supply current (240 µA/ch), no shutdown pins, 10-MHz GBW	Better DC accuracy but higher power; lacks channel-selectable shutdown-unsuitable for dynamic power-gating schemes	Choose for ultra-low-offset applications where power budget permits and shutdown is unnecessary
LM324BQPWRQ1	Automotive-qualified, lower bandwidth (1.2 MHz), higher offset (±1.5 mV), no rail-to-rail output	Qualified for AEC-Q100 Grade 1; limited output swing (1.5 V from rail) restricts use in low-headroom 3.3-V systems	Choose for cost-sensitive automotive body electronics where extended temperature range is mandatory but precision is secondary

Compared with OPA4990IRUCR, OPA4197IPWR trades 4× higher quiescent current for 6× lower offset and 9× higher bandwidth-ideal for high-speed precision filtering but impractical in always-on IoT nodes. LM324BQPWRQ1 offers automotive qualification and lower cost but sacrifices rail-to-rail output and EMI immunity-requiring design compromises in noise-prone environments.

Availability

OPA4990IRUCR is available at Aetrix Electronics and suitable for multiplexed data-acquisition systems, motor drive power stage monitoring, and programmable logic controller analog I/O requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for OPA4990IRUCR 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 over 50 years of innovation in precision amplifiers and high-reliability industrial ICs.

The OPAx990 family-including OPA4990IRUCR-is engineered for high-voltage industrial signal conditioning, combining rail-to-rail operation, low drift, and robust EMI immunity to replace legacy op amps in demanding analog front-ends.

FAQ

What is the maximum supply voltage for OPA4990IRUCR?

The OPA4990IRUCR supports a maximum supply voltage of 40 V across V+ and V– terminals, with absolute maximum ratings allowing up to 42 V for short-duration transients. This rating applies to both single-supply (2.7 V to 40 V) and split-supply (±1.35 V to ±20 V) configurations, making it suitable for industrial 24-V and 36-V bus monitoring applications without external regulation.

Does OPA4990IRUCR support rail-to-rail output swing under heavy load?

Yes, OPA4990IRUCR delivers rail-to-rail output swing with specified headroom: 45–60 mV at 10-kΩ load and 40-V supply, and only 25–50 mV at 2-kΩ load and 2.7-V supply. Its ±80 mA short-circuit current capability ensures stable operation even under transient overload, preserving signal integrity in high-current sensor interfaces.

How does the shutdown feature work on OPA4990IRUCR?

OPA4990IRUCR implements dual independent shutdown control: SHDN12 disables channels 1 and 2 when driven high, while SHDN34 disables channels 3 and 4. Both pins require logic-low (≤ V– + 0.2 V) to enable amplifiers and logic-high (≥ V– + 1.1 V) to disable them. Shutdown reduces quiescent current per channel to <1 µA, enabling dynamic power management in battery-powered or energy-harvesting systems.

Can OPA4990IRUCR be used as a comparator?

Yes, OPA4990IRUCR is explicitly designed for open-loop comparator use due to its MUX-friendly inputs-accepting differential voltages up to VS + 0.2 V-and clean rail-to-rail output saturation. Unlike standard op amps, it avoids phase reversal and latching when inputs exceed common-mode range, making it suitable for zero-crossing detection and overvoltage protection circuits without external clamping diodes.

What thermal considerations apply to the OPA4990IRUCR RUC package?

The OPA4990IRUCR in the 14-pin X2QFN (RUC) package requires the exposed thermal pad to be soldered to the V– net for effective heat dissipation. With R_θJA = 143.0°C/W and R_θJB = 81.8°C/W, PCB copper area under the pad significantly impacts junction temperature-designers should allocate ≥250 mm² of 2-oz copper connected via ≥6 thermal vias to internal ground planes to maintain T_J < 125°C at full 40-V, 4-channel operation.

OPA4990IRUCR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 14-XFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: Rail-to-Rail

Slew Rate:: 4.5V/µs

Gain Bandwidth Product:: 1.1 MHz

-3db Bandwidth:: -

Current - Input Bias:: 10 pA

Voltage - Input Offset:: 300 µV

Current - Supply:: 120µA (x2 Channels)

Current - Output / Channel:: 80 mA

Voltage - Supply Span (Min):: 2.7 V

Voltage - Supply Span (Max):: 40 V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-QFN (2x2)

OPA4990IRUCR FAQ

1.How can I place an order for OPA4990IRUCR through Aetrix?

Please submit a Request for Quotation (RFQ) for OPA4990IRUCR 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 OPA4990IRUCR reliable?

The price and inventory of OPA4990IRUCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4990IRUCR is usually 5 days.

3.What payment methods are accepted for OPA4990IRUCR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4990IRUCR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for OPA4990IRUCR?

OPA4990IRUCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your OPA4990IRUCR 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 OPA4990IRUCR?

For technical support, including OPA4990IRUCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4990IRUCR requirements.

6.How does Aetrix verify that OPA4990IRUCR is sourced from the original manufacturer or authorized distributors?

All OPA4990IRUCR 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 OPA4990IRUCR meets industry standards.

7.What is the process for return or replacement of OPA4990IRUCR?

All OPA4990IRUCR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4990IRUCR, 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 OPA4990IRUCR part is unused and in its original packaging.

Return procedure for OPA4990IRUCR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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