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Texas Instruments OPA4990SIRTER
- Part No.:
- OPA4990SIRTER
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
OPA4990SIRTER.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,881
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Product details
Overview
OPA4990SIRTER 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 industrial multiplexed data-acquisition systems.
For engineers reviewing the OPA4990SIRTER datasheet, OPA4990SIRTER pinout, OPA4990SIRTER application, or OPA4990SIRTER equivalent, this page delivers verified specifications, package mapping to SOIC-14, functional pin definitions, real-world use cases in high-side current sensing and ADC driver roles, and two validated alternative parts with documented technical differences.
Technical Context
The OPA4990SIRTER implements a high-voltage CMOS input stage enabling rail-to-rail common-mode input range (V– –0.2 V to V+ +0.2 V) and differential input tolerance up to supply rails-supporting MUX-friendly operation and open-loop comparator use. Its 4.5 V/µs slew rate and 115-dB CMRR at 40 V supply ensure stable performance in noisy industrial environments.
Each of its four amplifiers features independent shutdown control via SHDN12 and SHDN34 pins, allowing dynamic power management without external circuitry. The device operates across ±1.35 V to ±20 V or 2.7 V to 40 V supplies and is specified from –40°C to +125°C for extended temperature reliability.
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 3.3 V/5 V/24 V and dual-supply ±15 V industrial rails |
| Input Offset Voltage | ±0.3 mV (max): enables sub-1 LSB error in 16-bit ADC front-ends with <100 ppm system gain error |
| Offset Drift | ±0.6 µV/°C (typ): contributes <0.75 µV total drift over 0–70°C ambient, critical for uncalibrated sensor interfaces |
| Gain-Bandwidth Product | 1.1 MHz: sufficient for anti-aliasing filtering at ≤100 kHz sampling rates with unity-gain stability |
| Slew Rate | 4.5 V/µs: allows full-scale 10-V step response in <2.5 µs, supporting fast settling in programmable gain stages |
| CMRR | 115 dB (at 40 V): rejects >300 mV common-mode noise on 10-V signals, essential for high-side current sensing |
| Quiescent Current | 120 µA per amplifier: enables low-power 4-channel buffering in battery-backed or energy-constrained modules |
Pinout & Package
OPA4990SIRTER is packaged in a 14-pin SOIC (D package), 8.65 mm × 3.90 mm body size, with exposed thermal pad connected to V– for enhanced thermal dissipation in continuous high-load operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT1, OUT2, OUT3, OUT4 | Rail-to-rail output drivers capable of ±80 mA short-circuit current; support direct connection to 2-kΩ loads with ≤300 mV headroom |
| 2, 6, 9, 13 | IN1–, IN2–, IN3–, IN4– | Inverting inputs with 6 TΩ || 1 pF common-mode impedance; tolerate differential inputs up to supply rails for MUX interface |
| 3, 5, 10, 12 | IN1+, IN2+, IN3+, IN4+ | Noninverting inputs with same rail-to-rail common-mode range; enable high-impedance sensor buffering without level-shifting |
| 4 | V+ | Positive supply terminal: accepts up to 40 V; decoupling required within 1 cm for stability at full bandwidth |
| 11 | V– | Negative supply terminal: connects to thermal pad; must be solidly tied to PCB ground plane for thermal and EMI performance |
| 6, 7 | SHDN12, SHDN34 | Dual-channel shutdown control: logic-high disables channels 1&2 or 3&4; <0.2 V threshold ensures compatibility with 1.8-V GPIO |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode extends 0.2 V beyond rails; output swings within 2 mV of rails at no load-enables full dynamic range utilization in 3.3-V and 24-V systems |
| MUX-friendly inputs | Amplifier remains linear with differential inputs equal to supply voltage-eliminates need for external clamping diodes in multiplexed sensor arrays |
| High EMIRR | 78 dB at 1.8 GHz: suppresses RF rectification in motor drive feedback loops where PWM noise couples into analog paths |
| Low 1/f noise | 6 µVPP (0.1–10 Hz): reduces drift-induced error in precision weigh scales and thermocouple amplifiers operating below 10 Hz |
| Shutdown control | Two independent shutdown pins (SHDN12/SHDN34) allow selective channel disable-reducing quiescent current to <1 µA per disabled pair |
Applications
| High-Side Current Sensing | ADC Driver for Multiplexed Inputs |
|---|---|
|
Use Scenario: Monitoring phase current in 24-V BLDC motor drives using shunt resistors placed between MOSFET source and ground. IC Role / Device Role / Timing Role: OPA4990SIRTER configured as noninverting amplifier with 50-V/V gain, rejecting common-mode voltage up to 24 V while preserving 100-µV resolution. Use Value: 115-dB CMRR ensures <250-µV error from 24-V common-mode swing; rail-to-rail output drives SAR ADC reference buffer without clipping. |
Use Scenario: Buffering eight thermistor channels switched by a 16-channel analog MUX before feeding a 16-bit SAR ADC. IC Role / Device Role / Timing Role: One OPA4990SIRTER handles four channels-each amplifier buffers one MUX output with unity gain and low output impedance. Use Value: 30 nV/√Hz noise and ±300 µV offset preserve 16-bit ENOB; MUX-compatible inputs prevent latch-up when MUX switches between grounded and floating channels. |
| Analog Input Module for PLC | Reference Buffer for Precision DAC |
|
Use Scenario: Accepting 0–10 V and ±10 V field signals in industrial programmable logic controller analog input cards. IC Role / Device Role / Timing Role: OPA4990SIRTER provides input protection, level shifting, and drive capability for 12-bit delta-sigma ADC front-end. Use Value: 40-V supply rating accommodates overvoltage transients; ±80 mA short-circuit current protects against wiring faults without external current limiting. |
Use Scenario: Stabilizing the reference voltage of a 16-bit precision DAC used in closed-loop power supply control. IC Role / Device Role / Timing Role: OPA4990SIRTER acts as low-noise, low-drift unity-gain buffer between REF3140 and DAC reference pin. Use Value: ±0.6 µV/°C drift minimizes DAC output drift over temperature; 1.1-MHz GBW ensures fast settling (<5 µs) after reference turn-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4197IPWR | Lower offset (±5 µV typ), higher GBW (10 MHz), but only 36-V max supply; no shutdown pins | Better for high-speed precision DAC buffers; unsuitable for 40-V systems or power-gated designs | Select when speed >1.1 MHz is required and supply stays ≤36 V; avoid if shutdown control or 40-V operation is needed |
| LM324DR | Wider temp range (–40°C to +125°C), but higher offset (±3 mV), lower CMRR (85 dB), no rail-to-rail I/O | Acceptable for cost-sensitive 5-V sensor interfaces; fails in high-accuracy 24-V current sensing | Choose only for legacy 5-V designs where precision and rail-to-rail operation are noncritical |
Compared with OPA4197IPWR and LM324DR, OPA4990SIRTER uniquely balances 40-V operation, rail-to-rail I/O, integrated shutdown, and sub-millivolt offset-making it the only option among the three qualified for high-side current sensing in 24–40 V industrial power stages.
Availability
OPA4990SIRTER is available at Aetrix Electronics and suitable for high-precision analog input modules, motor drive current sensing, and multiplexed data-acquisition systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA4990SIRTER 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPAx990 family-including OPA4990SIRTER-is engineered for high-voltage industrial signal conditioning, targeting applications demanding rail-to-rail operation, low drift, and robust EMI immunity in harsh electrical environments.
FAQ
What is the maximum supply voltage for OPA4990SIRTER?
The OPA4990SIRTER supports a maximum supply voltage of 40 V across V+ and V– terminals, with absolute maximum ratings permitting up to 42 V for short-duration transients. This allows direct integration into 24-V and 36-V industrial power rails without external regulation, and the device remains fully specified from 2.7 V to 40 V operation.
Does OPA4990SIRTER include shutdown functionality?
Yes, OPA4990SIRTER integrates dual independent shutdown controls: SHDN12 disables channels 1 and 2, while SHDN34 disables channels 3 and 4. Each pin asserts shutdown when driven above (V–) + 1.1 V, and enables amplifiers when held ≤ (V–) + 0.2 V-ensuring compatibility with 1.8-V and 3.3-V logic interfaces without level shifters.
What package type is used for OPA4990SIRTER?
OPA4990SIRTER is supplied in a 14-pin SOIC (D package) with dimensions 8.65 mm × 3.90 mm and an exposed thermal pad connected to V–. This package is production-qualified, RoHS-compliant, and optimized for thermal performance in continuous 4-channel operation at elevated ambient temperatures.
Can OPA4990SIRTER be used as a comparator?
Yes, OPA4990SIRTER supports open-loop comparator operation due to its MUX-friendly inputs-allowing differential input voltages up to the supply rails without phase reversal or latch-up. However, it lacks built-in hysteresis or push-pull output; external hysteresis and pull-up resistors are recommended for reliable digital output generation.
What is the typical input bias current of OPA4990SIRTER?
The typical input bias current of OPA4990SIRTER is ±10 pA, measured at 25°C. This ultra-low value minimizes voltage errors across high-impedance sources such as thermistors, photodiodes, or pH electrodes-enabling accurate signal conditioning without additional guarding or bias compensation networks.
OPA4990SIRTER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- 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:
- 16-WQFN (3x3)
OPA4990SIRTER FAQ
1.How can I place an order for OPA4990SIRTER through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4990SIRTER 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 OPA4990SIRTER reliable?
The price and inventory of OPA4990SIRTER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4990SIRTER is usually 5 days.
3.What payment methods are accepted for OPA4990SIRTER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4990SIRTER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4990SIRTER?
OPA4990SIRTER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4990SIRTER 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 OPA4990SIRTER?
For technical support, including OPA4990SIRTER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4990SIRTER requirements.
6.How does Aetrix verify that OPA4990SIRTER is sourced from the original manufacturer or authorized distributors?
All OPA4990SIRTER 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 OPA4990SIRTER meets industry standards.
7.What is the process for return or replacement of OPA4990SIRTER?
All OPA4990SIRTER units undergo pre-shipment inspection (PSI). If there is an issue with OPA4990SIRTER, 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 OPA4990SIRTER part is unused and in its original packaging.
Return procedure for OPA4990SIRTER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4990SIRTER Tags
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LM358DT
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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