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Analog Devices Inc. OP481GRUZ-REEL
- Part No.:
- OP481GRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OP481GRUZ-REEL.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,486
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Product details
Overview
OP481GRUZ-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 −40°C to +85°C extended industrial temperature range. It serves as signal conditioner and comparator in battery-powered safety monitoring and remote sensor interfaces.
For engineers reviewing the OP481GRUZ-REEL datasheet, OP481GRUZ-REEL pinout, OP481GRUZ-REEL application, or OP481GRUZ-REEL equivalent, key selection criteria include micropower consumption under load, rail-to-rail output swing at sub-3 V supplies, no phase reversal behavior, and guaranteed performance across ±5 V, +5 V, and +3 V configurations.
Technical Context
The OP481GRUZ-REEL employs a precision bipolar input stage with PNP transistors enabling input common-mode range extending to ground, and a CMOS common-source output stage delivering rail-to-rail swing within millivolts of supply rails. Its supply current remains ≤4 μA per amplifier even when output is saturated at either rail - a critical distinction from competing micropower op amps.
It achieves 95–105 kHz gain bandwidth product, 25–28 V/ms slew rate, and 65–120 μs saturation recovery time depending on supply configuration. The device exhibits no phase reversal and supports stable operation with capacitive loads up to 10 nF, enabled by ≥70° phase margin and careful output-stage compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current/Amplifier | 4 μA maximum - enables multi-year battery life in always-on remote sensors |
| Input Offset Voltage | 1.5 mV maximum at 25°C - ensures <±100 μV error in 3 V full-scale 12-bit ADC front ends |
| Rail-to-Rail Output Swing | Within 25 mV of rails at 100 kΩ load - preserves dynamic range in low-voltage single-supply systems |
| Gain Bandwidth Product | 95 kHz (VS = 3 V) to 105 kHz (VS = ±5 V) - supports DC-coupled signal conditioning up to ~10 kHz |
| Saturation Recovery Time | 65 μs (VS = 3 V), 120 μs (VS = ±5 V) - enables reliable comparator use in slow-sampling safety monitors |
| Operating Temperature Range | −40°C to +85°C - qualified for industrial and automotive cabin-ambient environments |
| Input Common-Mode Range | 0 V to (V+) − 1 V - allows direct interfacing with grounded transducers and shunt-based current sensing |
Pinout & Package
OP481GRUZ-REEL is packaged in a 14-lead TSSOP (RU suffix), 5.0 mm × 4.4 mm body, 0.65 mm pitch, moisture sensitivity level 1. Pin functions are validated per Figure 4 of Rev. D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or feedback network; rail-to-rail capable |
| 2 | –IN A | Inverting input of Amp A - accepts differential or single-ended signals with common-mode down to GND |
| 3 | +IN A | Non-inverting input of Amp A - high-impedance node; bias current ≤10 nA over temperature |
| 4 | V+ | Positive supply rail - accepts 2.7 V to 12 V single supply or +5 V in dual-supply mode |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other channels; supports independent biasing |
| 6 | –IN B | Inverting input of Amp B - shares no internal coupling with Amp A inputs |
| 7 | OUT B | Amplifier B output - fully independent output stage; sinks/sources current to rails |
| 8 | OUT D | Amplifier D output - pin 8 is OUT D, not V–; confirmed per Figure 4 top view orientation |
| 9 | –IN D | Inverting input of Amp D - matches input characteristics of Amp A/B/C |
| 10 | +IN D | Non-inverting input of Amp D - identical input structure and ESD protection to other inputs |
| 11 | V– | Negative supply rail - required for dual-supply operation; tied to GND in single-supply configs |
| 12 | +IN C | Non-inverting input of Amp C - supports four-channel parallel or cascaded signal paths |
| 13 | –IN C | Inverting input of Amp C - maintains channel separation >105 dB at 1 kHz |
| 14 | OUT C | Amplifier C output - independently buffered; no crosstalk-induced distortion observed in testing |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under input overvoltage conditions down to VEE − 0.6 V - eliminates false triggering in sensor fault detection |
| Micropower rail-to-rail output | Output swings to within 25 mV of V+ or V– while drawing ≤4 μA - enables true 0–3 V signal fidelity in 3 V systems |
| Input common-mode range to ground | Operates with inputs at 0 V in single-supply mode - supports direct connection to grounded strain gauges or thermistors |
| Stable with capacitive loads | Remains stable with up to 10 nF output capacitance - eliminates need for isolation resistors in RC-filtered sensor outputs |
| Low input bias current drift | ΔIB/ΔT ≤ 20 pA/°C - minimizes offset drift in high-impedance pH or ion-selective electrode interfaces |
Applications
| Battery-Powered Safety Monitor | Remote Low-Power Sensor Interface |
|---|---|
Use Scenario: Continuous monitoring of CO, smoke, or gas levels in wireless home safety devices powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Signal conditioner for electrochemical sensor output and window comparator for alarm threshold enforcement. Use Value: 4 μA/amplifier quiescent current extends battery life beyond 5 years; rail-to-rail output ensures full utilization of 3 V ADC reference. |
Use Scenario: Signal amplification and level-shifting for MEMS accelerometers or humidity sensors deployed in unpowered field nodes. IC Role / Device Role / Timing Role: Transducer interface amplifier with integrated bias generation and low-pass filtering. Use Value: Input common-mode range to ground allows direct connection to grounded sensor elements; micropower operation enables duty-cycled wake-up every 10 seconds. |
| Low-Voltage Strain Gauge Amplifier | Single-Supply Precision Reference Generator |
Use Scenario: Wheatstone bridge amplification in portable medical scales or industrial load cells operating from 3.3 V LDOs. IC Role / Device Role / Timing Role: Instrumentation-grade difference amplifier with matched input impedance and low offset drift. Use Value: 1.5 mV max offset and 10 μV/°C drift ensure <0.1% full-scale error over −20°C to +70°C ambient range. |
Use Scenario: Generation of stable 1.5 V or 2.5 V bias voltage for ADC references or analog front-end biasing in energy-harvesting systems. IC Role / Device Role / Timing Role: Unity-gain buffer for high-impedance resistor divider; provides low-noise, low-drift virtual ground. Use Value: Total circuit draws <5 μA from 3 V supply; output impedance <1 Ω at DC; 10 μV p-p 0.1–10 Hz noise preserves reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP482ARUZ-REEL | Same quad micropower architecture but specified for 2.7 V to 36 V supply range; higher PSRR (100 dB) and GBP (150 kHz) | Preferred for industrial 24 V systems requiring wider supply tolerance and faster settling | Select OP482ARUZ-REEL only if supply exceeds 12 V or bandwidth >100 kHz is needed; not drop-in due to different absolute max ratings |
| TLV2464IPW | Quad rail-to-rail op amp with 22 μA/amplifier supply current; 6.5 mV max offset; 6.4 MHz GBP | Higher speed and drive capability, but 5.5× higher quiescent current limits battery life | Choose TLV2464IPW only when >100 kHz closed-loop bandwidth or >25 mA output drive is required; unsuitable for multi-year coin-cell operation |
Compared with OP481GRUZ-REEL, OP482ARUZ-REEL extends supply range and bandwidth at the cost of higher minimum supply voltage (2.7 V vs. 2.0 V typical), while TLV2464IPW trades micropower operation for speed and output drive - making OP481GRUZ-REEL uniquely suited for ultra-low-duty-cycle, long-life sensor nodes.
Availability
OP481GRUZ-REEL is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensors, and low-voltage strain gage amplifiers requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OP481GRUZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The OPx81 family - including OP481GRUZ-REEL - was designed specifically for ultralow power, single-supply signal conditioning in safety-critical and energy-constrained systems such as portable medical devices and industrial IoT endpoints.
FAQ
What is the maximum supply voltage rating for OP481GRUZ-REEL?
The absolute maximum supply voltage for OP481GRUZ-REEL is 16 V, as specified in Table 4 of the Rev. D datasheet. Operation above 12 V is not recommended for long-term reliability; the device is fully characterized and guaranteed from 2.7 V to 12 V. Exceeding 16 V risks permanent damage to the internal CBCMOS process transistors.
Does OP481GRUZ-REEL support true rail-to-rail input operation?
OP481GRUZ-REEL does not support rail-to-rail input - its input common-mode voltage range is specified from VEE to (V+) − 1 V. However, it does extend to ground in single-supply configurations, enabling direct interfacing with grounded sensors. Input differential voltage must remain within ±3.5 V to avoid ESD diode conduction and phase reversal.
Can OP481GRUZ-REEL be used as a comparator, and what is its propagation delay?
Yes, OP481GRUZ-REEL is explicitly qualified for comparator use due to no phase reversal and fast saturation recovery (65–120 μs). Propagation delay is 250 μs as stated in the General Description section - measured under open-loop conditions with 3 V supply and 2.5 V overdrive. This makes it suitable for slow-response safety interlocks but not for high-speed digital logic.
What is the thermal resistance (θJA) of the OP481GRUZ-REEL package?
The OP481GRUZ-REEL uses a 14-lead TSSOP (RU suffix) package with θJA = 240°C/W, as listed in Table 5 of the Rev. D datasheet. This value assumes worst-case PCB mounting per JEDEC standards; actual board-level θJA will vary based on copper area and airflow. Junction-to-case (θJC) is 43°C/W, enabling accurate thermal modeling in sealed enclosures.
Is OP481GRUZ-REEL pin-compatible with OP281GRUZ-REEL?
No, OP481GRUZ-REEL is not pin-compatible with OP281GRUZ-REEL. OP281 is a dual amplifier in 8-lead TSSOP (pins 1–8), while OP481GRUZ-REEL is a quad in 14-lead TSSOP (pins 1–14) with different pin mapping - e.g., V– is pin 11 on OP481 but absent on OP281. Board redesign is required for substitution.
OP481GRUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- 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:
- 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
OP481GRUZ-REEL FAQ
1.How can I place an order for OP481GRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for OP481GRUZ-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 OP481GRUZ-REEL reliable?
The price and inventory of OP481GRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP481GRUZ-REEL is usually 5 days.
3.What payment methods are accepted for OP481GRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP481GRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP481GRUZ-REEL?
OP481GRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP481GRUZ-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 OP481GRUZ-REEL?
For technical support, including OP481GRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP481GRUZ-REEL requirements.
6.How does Aetrix verify that OP481GRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All OP481GRUZ-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 OP481GRUZ-REEL meets industry standards.
7.What is the process for return or replacement of OP481GRUZ-REEL?
All OP481GRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with OP481GRUZ-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 OP481GRUZ-REEL part is unused and in its original packaging.
Return procedure for OP481GRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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