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Analog Devices Inc. OP481GRU-REEL
- Part No.:
- OP481GRU-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OP481GRU-REEL.pdf
- Description:
- IC OPAMP GP R-R 105KHZ 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,536
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Product details
Overview
OP481GRU-REEL from Analog Devices is a quad ultralow power rail-to-rail output operational amplifier optimized for single-supply operation from 2.7 V to 12 V, featuring 4 μA/amplifier max supply current, 1.5 mV max offset voltage, and rail-to-rail output swing within 25 mV of either rail at 100 kΩ load - deployed in battery-powered instrumentation and remote sensor signal conditioning.
For engineers reviewing the OP481GRU-REEL datasheet, OP481GRU-REEL pinout, OP481GRU-REEL application, or OP481GRU-REEL equivalent, key selection criteria include micropower consumption under load, guaranteed rail-to-rail output performance at 3 V, no phase reversal behavior, and compatibility with extended industrial temperature range (−40°C to +85°C) designs.
Technical Context
The OP481GRU-REEL employs a precision bipolar input stage with PNP transistors enabling input common-mode range down to ground, and a CMOS common-source output stage delivering millivolt-level rail-to-rail swing while maintaining sub-4 μA quiescent current even when saturated at supply rails. Its CBCMOS fabrication ensures low noise (75 nV/√Hz at 1 kHz) and stable operation with capacitive loads up to 10 nF.
It supports comparator use via fast saturation recovery (65–120 μs depending on supply), operates across ±5 V, +5 V, and +3 V supplies, and exhibits 95–105 kHz gain bandwidth product with 70–75° phase margin - all specified over −40°C to +85°C with no phase reversal under overvoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current / Amplifier | 4 μA max - enables multi-year battery life in always-on remote sensors. |
| Input Offset Voltage | 1.5 mV max at 25°C - ensures <±0.5% error in 3 V full-scale strain gage amplifiers. |
| Rail-to-Rail Output Swing | 25 mV above GND / 75 mV below V+ at 100 kΩ - preserves dynamic range in 3 V microcontroller ADC interfaces. |
| Gain Bandwidth Product | 100 kHz at 5 V - supports DC–10 kHz signal conditioning for vibration or temperature monitoring. |
| Saturation Recovery Time | 65 μs at 3 V - allows reliable use as low-power window comparator in safety monitoring. |
| Operating Temperature Range | −40°C to +85°C - qualified for industrial embedded systems without derating. |
| Input Bias Current | 10 nA max - minimizes voltage error across high-impedance pH or thermistor sensor networks. |
Pinout & Package
OP481GRU-REEL is packaged in a 14-lead TSSOP (RU suffix), 5.0 mm × 4.4 mm body, 0.65 mm pitch, exposed pad not electrically connected. Pinout matches Figure 4 in Rev. D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives low-impedance loads directly; rail-to-rail swing supports 3 V ADC reference buffering. |
| 2 | –IN A | Inverting input A - accepts differential signals down to GND; protected against phase reversal by internal ESD diodes. |
| 3 | +IN A | Noninverting input A - used for unity-gain buffer or high-Z sensor interface; common-mode range includes GND. |
| 4 | V+ | Positive supply - accepts 2.7–12 V single supply or +5 V in dual-supply mode; PSRR >76 dB suppresses supply ripple. |
| 5 | +IN B | Noninverting input B - independent channel for dual-sensor readout or feedback path in current monitor. |
| 6 | –IN B | Inverting input B - configured with external resistors for precision gain setting in low-voltage strain gage amps. |
| 7 | OUT B | Amplifier B output - shares same rail-to-rail drive capability as OUT A; isolated from other channels per Figure 3/4. |
| 8 | OUT D | Amplifier D output - fourth independent output; enables 4-channel sensor front-end without additional ICs. |
| 9 | –IN D | Inverting input D - supports active filtering or differential-to-single-ended conversion in portable medical devices. |
| 10 | +IN D | Noninverting input D - biasable to mid-supply for single-supply AC-coupled applications using micropower reference generator. |
| 11 | V– | Negative supply / GND - connects to system ground in single-supply mode; enables true low-side current sensing. |
| 12 | +IN C | Noninverting input C - used in window comparator configurations with A/B/D for fault detection logic. |
| 13 | –IN C | Inverting input C - pairs with +IN C for precision threshold setting in battery voltage monitors. |
| 14 | OUT C | Amplifier C output - delivers rail-to-rail output for third independent signal path; matched performance to other channels. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under input overvoltage to −0.6 V below V– - eliminates false triggering in safety-critical sensor interfaces. |
| Micropower operation at rail saturation | Supply current remains ≤4 μA even when output driven to V+ or GND - enables comparator use without current penalty. |
| Input common-mode range to GND | Operates with inputs at 0 V in single-supply mode - supports direct connection to shunt-based current sense or thermocouple cold-junction compensation. |
| Rail-to-rail output with millivolt headroom | Swings to within 25 mV of GND and 75 mV of V+ at 100 kΩ - maximizes usable ADC input range in 3 V systems. |
| Low input bias current drift | ΔIB/ΔT = 20 pA/°C - maintains accuracy across industrial temperature range without recalibration in field-deployed equipment. |
Applications
| Battery-Powered Instrumentation | Safety Monitoring |
|---|---|
Use Scenario: Portable gas detector with electrochemical sensor and 3 V coin-cell supply requiring 10-year shelf life. IC Role / Device Role / Timing Role: Signal conditioning amplifier for low-current sensor output; provides gain and level-shifting before 12-bit SAR ADC. Use Value: 4 μA/amplifier supply current extends battery life beyond 5 years; rail-to-rail output ensures full ADC code utilization at 3 V. |
Use Scenario: Industrial machine guard interlock system detecting door position via magnetic reed switch. IC Role / Device Role / Timing Role: Window comparator detecting safe open/closed states with hysteresis; drives opto-isolated fault latch. Use Value: 65 μs saturation recovery enables real-time response to intrusion; no phase reversal prevents false trips during ESD events. |
| Remote Sensors | Low-Voltage Strain Gage Amplifiers |
Use Scenario: Wireless structural health monitor on bridge girder powered by energy-harvesting circuit (<100 μW avg). IC Role / Device Role / Timing Role: Low-noise preamplifier for piezoelectric vibration sensor; DC-coupled with gain of 100. Use Value: 75 nV/√Hz noise density preserves SNR in sub-mV signals; 10 nA input bias avoids loading high-Z MEMS elements. |
Use Scenario: Battery-operated handheld torque wrench with quarter-bridge strain gage and 3.3 V MCU. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with precision resistor network and rail-to-rail output. Use Value: 1.5 mV offset voltage limits zero-error to <0.05% FS; rail-to-rail swing delivers full 0–3.3 V range to MCU ADC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IPW | Higher supply current (23 μA/amplifier), wider GBW (6.4 MHz), but no guaranteed rail-to-rail input. | Not suitable for GND-referenced sensor inputs or micropower battery life targets. | Select only if bandwidth >100 kHz and supply current >20 μA are acceptable. |
| MAX4475ASA+ | Lower offset (100 μV typ), but higher supply current (15 μA), limited to 5.5 V max supply. | Cannot replace OP481GRU-REEL in 12 V systems or where sub-5 μA total quiescent current is mandatory. | Prefer for precision DC-coupled applications where offset dominates, not micropower. |
Compared with TLV2464IPW and MAX4475ASA+, OP481GRU-REEL uniquely combines sub-5 μA supply current, rail-to-rail output, GND-referenced input, and −40°C to +85°C qualification - making it irreplaceable in ultra-low-power, single-supply, industrial-grade sensor nodes.
Availability
OP481GRU-REEL is available at Aetrix Electronics and suitable for battery-powered instrumentation, safety monitoring systems, and remote sensor deployments requiring stable component supply across long production lifecycles.
Supply support for OP481GRU-REEL 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The OPx81 family - including OP481GRU-REEL - was designed specifically for ultralow power, rail-to-rail output signal conditioning in battery-constrained, single-supply industrial and portable systems.
FAQ
What is the maximum supply voltage for OP481GRU-REEL?
The absolute maximum supply voltage for OP481GRU-REEL is 16 V, but the recommended operating range is 2.7 V to 12 V for single-supply use. Operation at 12 V is fully characterized per datasheet Table 1–3, with supply current remaining ≤5 μA/amplifier across −40°C to +85°C. Exceeding 16 V risks permanent damage per Absolute Maximum Ratings.
Does OP481GRU-REEL support true rail-to-rail input?
No - OP481GRU-REEL features rail-to-rail *output* only. Its input common-mode voltage range extends to GND but stops 1 V below V+, as specified in the General Description and Input Common-Mode Voltage Range section. This allows direct interfacing with ground-referenced sensors but requires input signals to remain within VEE to (VCC − 1 V).
Can OP481GRU-REEL be used as a comparator?
Yes - OP481GRU-REEL is explicitly qualified for comparator use due to its fast saturation recovery time (65 μs at 3 V), no phase reversal, and stable operation when driven hard to the rails. Propagation delay is 250 μs, and it sinks/sources current at the rail - confirmed in Applications and Theory of Operation sections.
What is the thermal resistance θJA for OP481GRU-REEL?
For OP481GRU-REEL in its 14-lead TSSOP (RU) package, θJA is 240°C/W per Table 5. This value assumes worst-case PCB mounting per JEDEC standards. Junction-to-case (θJC) is 43°C/W. At 4 μA × 4 channels × 5 V = 80 μW total dissipation, self-heating is negligible (<0.02°C) under typical conditions.
Is OP481GRU-REEL pin-compatible with OP482 or OP484 variants?
No - OP481GRU-REEL is not pin-compatible with OP482 or OP484. The OP481 is a quad amplifier in 14-lead TSSOP/SOIC; OP482 is a dual amplifier in 8-lead packages, and OP484 is a quad with different pinout (e.g., V– on Pin 11 vs. Pin 4 in OP481). Substitution requires PCB redesign.
OP481GRU-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.028V/µs
- Gain Bandwidth Product:
- 105 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 3.3µA (x4 Channels)
- Current - Output / Channel:
- 12 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OP481GRU-REEL FAQ
1.How can I place an order for OP481GRU-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for OP481GRU-REEL 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 OP481GRU-REEL reliable?
The price and inventory of OP481GRU-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP481GRU-REEL is usually 5 days.
3.What payment methods are accepted for OP481GRU-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP481GRU-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP481GRU-REEL?
OP481GRU-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP481GRU-REEL 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 OP481GRU-REEL?
For technical support, including OP481GRU-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP481GRU-REEL requirements.
6.How does Aetrix verify that OP481GRU-REEL is sourced from the original manufacturer or authorized distributors?
All OP481GRU-REEL 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 OP481GRU-REEL meets industry standards.
7.What is the process for return or replacement of OP481GRU-REEL?
All OP481GRU-REEL units undergo pre-shipment inspection (PSI). If there is an issue with OP481GRU-REEL, 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 OP481GRU-REEL part is unused and in its original packaging.
Return procedure for OP481GRU-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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