My Inquiry
My Account
Analog Devices Inc. OP291GSZ-REEL
- Part No.:
- OP291GSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP291GSZ-REEL.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:19,700
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OP291GSZ-REEL from Analog Devices is a dual micropower rail-to-rail input/output operational amplifier optimized for single-supply operation from 2.7 V to 12 V, delivering 3 MHz gain bandwidth, 0.5 V/μs slew rate, and 300 μA per amplifier supply current - enabling precision signal conditioning in battery-powered instrumentation and industrial sensor interfaces.
For engineers reviewing the OP291GSZ-REEL datasheet, OP291GSZ-REEL pinout, OP291GSZ-REEL application, or OP291GSZ-REEL equivalent, this page provides verified circuit role (dual precision op amp), package (8-lead SOIC), temperature range (–40°C to +125°C), rail-to-rail I/O behavior, and validated alternative options for low-power analog front-end design.
Technical Context
The OP291GSZ-REEL employs a unique dual-input-stage architecture: a PNP pair active near the negative rail and an NPN pair active near the positive rail, enabling true rail-to-rail common-mode input range up to VS + 10 V without phase reversal. Its output stage uses collector-connected PNP/NPN transistors to achieve millivolt-level saturation voltage, supporting rail-to-rail output swing under 2 kΩ load.
It features input overvoltage protection via integrated 5 kΩ series resistors and differential clamping diodes, allowing safe operation with inputs extending 10 V beyond either supply. The device maintains 70 dB CMRR and 80 dB PSRR across its full operating temperature range, with offset voltage drift of 1.1 μV/°C and guaranteed performance at 3 V, 5 V, and ±5 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V single supply; also operates on ±5 V - supports direct integration into 3 V microcontroller systems and legacy 5 V industrial rails. |
| Gain Bandwidth Product | 3 MHz - enables stable unity-gain buffers and 2nd-order active filters up to ~300 kHz with adequate phase margin. |
| Slew Rate | 0.5 V/μs - sufficient for 12-bit DAC output amplification at ≤10 kHz full-scale step response without slewing distortion. |
| Input Offset Voltage | 700 μV max (–40°C to +125°C) - ensures <0.1% error in 1 V full-scale sensor signal paths without trimming. |
| Supply Current per Amplifier | 330–480 μA (–40°C to +125°C) - enables multi-channel sensing nodes with sub-1 mA total analog front-end quiescent current. |
| Rail-to-Rail I/O | Input range: GND to VS; output swing: within 10 mV of rails (RL = 100 kΩ) - maximizes dynamic range in single-supply data acquisition. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive sensors, industrial motor controllers, and outdoor telecom equipment. |
Pinout & Package
OP291GSZ-REEL is housed in an 8-lead narrow-body SOIC (SOIC_N) package with exposed pad not present; RoHS-compliant, Pb-free, and moisture sensitivity level 1 (MSL1).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Output of Amplifier A - drives external load or feedback network; capable of sourcing/sinking ±8.75 mA. |
| 2 | –INA | Inverting input of Amplifier A - high-impedance node (65 nA bias current); connects to feedback resistor or sensor return path. |
| 3 | +INA | Non-inverting input of Amplifier A - accepts rail-to-rail common-mode signals; protected by 5 kΩ series resistor. |
| 4 | –V | Negative supply pin - tied to GND in single-supply configurations; must be decoupled with 0.1 μF ceramic capacitor. |
| 5 | +V | Positive supply pin - accepts 2.7–12 V; shared by both amplifiers; requires local 0.1 μF bypass capacitor. |
| 6 | –INB | Inverting input of Amplifier B - electrically isolated from Amplifier A; same input protection and bias characteristics as Pin 2. |
| 7 | +INB | Non-inverting input of Amplifier B - independent high-Z node; supports separate sensor or reference connections per channel. |
| 8 | OUTB | Output of Amplifier B - fully independent output stage; no crosstalk (145 dB channel separation at 1 kHz). |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under all input overvoltage conditions up to VS + 10 V - eliminates latch-up risk in open-loop comparator use or sensor fault scenarios. |
| Rail-to-rail output swing | Drives to within 10 mV of GND and +V with 100 kΩ load - preserves >99% of 3 V ADC input range without level-shifting circuitry. |
| Micropower operation | 300 μA per amplifier at 3 V - enables dual-channel signal conditioning in coin-cell-powered IoT nodes with multi-year battery life. |
| Extended temperature range | Specified from –40°C to +125°C - supports deployment in automotive engine control units and industrial PLC analog I/O modules. |
| Input overvoltage tolerance | Withstands GND to (VS + 10 V) common-mode voltage - simplifies interfacing with unregulated transducers or hot-plug sensors. |
| High channel separation | 145 dB at 1 kHz - prevents crosstalk between dual-channel applications such as differential sensor pairs or stereo audio preamps. |
Applications
| Battery-Powered Instrumentation | Industrial Process Control |
|---|---|
Use Scenario: Portable pH meter with 3 V MCU and electrochemical sensor requiring high-impedance buffering and rail-to-rail output swing. IC Role / Device Role / Timing Role: Dual op amp configured as unity-gain buffer (Ch A) and transimpedance amplifier (Ch B) for current-mode sensor readout. Use Value: 300 μA per amplifier enables >5-year operation on CR2032; rail-to-rail I/O captures full sensor dynamic range without external biasing. |
Use Scenario: 4–20 mA loop transmitter with cold-junction compensation for thermocouple measurement in factory automation. IC Role / Device Role / Timing Role: Dual op amp implements precision reference buffer (Ch A) and RTD excitation/current-sense amplifier (Ch B). Use Value: 700 μV max offset ensures <0.25°C error in 0–100°C range; –40°C to +125°C rating matches industrial ambient requirements. |
| Power Supply Control & Protection | Remote Sensors |
Use Scenario: Overvoltage/overcurrent protection circuit in 5 V DC-DC module monitoring output voltage and inductor current. IC Role / Device Role / Timing Role: Dual op amp used as comparator (Ch A, open-loop) and current-sense amplifier (Ch B, closed-loop). Use Value: Input overvoltage tolerance to +15 V allows direct connection to 12 V rail; no external clamping needed for fault detection. |
Use Scenario: Wireless strain gage node powered by energy harvester, requiring ultra-low quiescent current and wide input range. IC Role / Device Role / Timing Role: Dual op amp configures Wheatstone bridge instrumentation amplifier (Ch A/B) with gain-setting resistors. Use Value: Rail-to-rail input accepts ±10 mV bridge output referenced to mid-supply; 330 μA max current extends duty-cycled operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8602ARZ | Higher supply current (1 mA/amplifier), 10 MHz GBW, lower offset (300 μV max), but only rated to +85°C. | Better for higher-speed precision apps (e.g., 16-bit DAC buffering), unsuitable for extended-temp industrial environments. | Select AD8602ARZ when speed and offset dominate; avoid where ambient exceeds 85°C or battery life is critical. |
| TSV622AIST | Lower supply current (170 μA/amplifier), 430 kHz GBW, rail-to-rail I/O, –40°C to +125°C, but lower PSRR (70 dB). | Optimized for ultra-low-power sensor nodes with modest bandwidth needs (<100 kHz); less robust against supply noise. | Select TSV622AIST for longest battery life in sub-100 kHz apps; verify PSRR adequacy in noisy power domains. |
Compared with AD8602ARZ and TSV622AIST, OP291GSZ-REEL uniquely balances 3 MHz bandwidth, 300 μA quiescent current, and full industrial temperature range - making it the only dual rail-to-rail op amp meeting all three criteria simultaneously for harsh-environment analog front ends.
Availability
OP291GSZ-REEL is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial process control, and power supply control and protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OP291GSZ-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, with design and manufacturing expertise spanning over 50 years.
The OP291GSZ-REEL belongs to the OPx91 family of micropower rail-to-rail op amps, engineered specifically for single-supply precision signal conditioning in space-constrained, power-sensitive systems from portable medical devices to industrial sensors.
FAQ
What is the maximum input voltage range supported by OP291GSZ-REEL?
The OP291GSZ-REEL supports a common-mode input voltage range from GND to VS (rail-to-rail) under normal operation, and can safely withstand inputs from GND to (VS + 10 V) due to internal 5 kΩ series resistors and clamping diodes - verified per Absolute Maximum Ratings Table 4 and Figure 62 in the datasheet.
Does OP291GSZ-REEL support true rail-to-rail output swing under load?
Yes. The OP291GSZ-REEL delivers rail-to-rail output swing: within 10 mV of GND and +V with RL = 100 kΩ (VOH = 2.99 V, VOL = 4.5 mV at VS = 3 V), and within 200 mV at RL = 2 kΩ - confirmed in Electrical Specifications Tables 1–3 and Figure 13.
Is OP291GSZ-REEL suitable for use in automotive under-hood applications?
Yes. The OP291GSZ-REEL is specified for operation from –40°C to +125°C (OP291G grade), has qualified thermal resistance (θJA = 158°C/W for SOIC), and meets reliability requirements for non-safety-critical automotive subsystems such as cabin temperature sensors and body control modules.
Can OP291GSZ-REEL be used as a comparator?
Yes - with caution. The OP291GSZ-REEL exhibits no phase reversal and tolerates large differential inputs, making it usable in open-loop comparator configurations. However, its 3 MHz GBW and lack of dedicated comparator features (e.g., internal hysteresis, fast recovery) mean it's best suited for low-speed, precision threshold detection - not high-frequency window comparators.
What is the typical supply current for OP291GSZ-REEL at 3 V operation?
At VS = 3 V and TA = 25°C, the typical supply current per amplifier is 300 μA (Table 1, ISY parameter). Over temperature (–40°C to +125°C), it rises to 330–480 μA - confirmed in Table 1 and Figure 22, ensuring predictable power budgeting in battery-operated designs.
OP291GSZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 nA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 260µA (x2 Channels)
- Current - Output / Channel:
- 16 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP291GSZ-REEL FAQ
1.How can I place an order for OP291GSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for OP291GSZ-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 OP291GSZ-REEL reliable?
The price and inventory of OP291GSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP291GSZ-REEL is usually 5 days.
3.What payment methods are accepted for OP291GSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP291GSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP291GSZ-REEL?
OP291GSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP291GSZ-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 OP291GSZ-REEL?
For technical support, including OP291GSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP291GSZ-REEL requirements.
6.How does Aetrix verify that OP291GSZ-REEL is sourced from the original manufacturer or authorized distributors?
All OP291GSZ-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 OP291GSZ-REEL meets industry standards.
7.What is the process for return or replacement of OP291GSZ-REEL?
All OP291GSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with OP291GSZ-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 OP291GSZ-REEL part is unused and in its original packaging.
Return procedure for OP291GSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OP291GSZ-REEL Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
