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Analog Devices Inc. OP191GS-REEL
- Part No.:
- OP191GS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP191GS-REEL.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,539
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Product details
Overview
OP191GS-REEL from Analog Devices is a micropower, single-supply rail-to-rail input/output operational amplifier in an 8-lead SOIC package. It operates from 2.7 V to 12 V, delivers 3 MHz gain bandwidth, 0.5 V/μs slew rate, and consumes only 300 μA per amplifier. It enables precision signal conditioning in battery-powered instrumentation and low-voltage sensor interfaces where rail-to-rail swing and micropower operation are critical.
For engineers reviewing the OP191GS-REEL datasheet, OP191GS-REEL pinout, OP191GS-REEL application, or OP191GS-REEL equivalent, this page provides verified electrical specifications, thermal performance data, real-world application configurations, and validated alternative options for industrial and portable analog signal chains.
Technical Context
The OP191GS-REEL uses a dual-input-stage architecture-comprising complementary PNP and NPN differential pairs-that automatically switches based on input common-mode voltage to maintain linear operation across the full rail-to-rail range (GND to VS). This eliminates phase reversal when inputs exceed supply rails by up to 10 V.
Its output stage employs collector-connected PNP/NPN transistors enabling rail-to-rail swing with <10 mV low-side and <50 mV high-side saturation voltage at light loads. Open-loop gain remains stable across temperature (−40°C to +125°C) and load conditions, with gain-bandwidth product tightly specified at 3 MHz and phase margin of 45°.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports direct operation from single Li-ion, 3.3 V, or 5 V rails without regulation. |
| Gain Bandwidth Product | 3 MHz - enables stable unity-gain buffers and 2nd-order active filters up to ~300 kHz. |
| Slew Rate | 0.5 V/μs - sufficient for 12-bit DAC output amplification at ≤100 kHz full-scale transitions. |
| Input Offset Voltage | 700 μV max (−40°C to +125°C) - ensures ≤0.07% error in 1 V full-scale sensor signal paths. |
| Supply Current per Amplifier | 350 μA typical at 3 V - allows >10-year battery life in 10 μA average-power remote sensor nodes. |
| Output Swing (RL = 100 kΩ) | Within 10 mV of GND and within 50 mV of VS - preserves dynamic range in single-supply 3 V systems. |
| Input Common-Mode Range | GND to VS - accepts signals directly from resistive sensors, RTDs, and thermocouples without level-shifting. |
Pinout & Package
OP191GS-REEL is housed in an 8-lead narrow-body SOIC (R package), with thermal resistance θJA = 158°C/W and θJC = 43°C/W. Pin 1 is NC (no connect); pins 2 and 3 are inverting and non-inverting inputs; pin 4 is −V (GND for single-supply use); pin 5 is NC; pin 6 is +V (positive supply); pin 7 is output; pin 8 is NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connect | Unused terminal; must be left floating or tied to GND per layout best practice. |
| Pin 2 (–INA) | Inverting Input | Differential input node; accepts signals up to VS + 10 V without phase reversal or latch-up. |
| Pin 3 (+INA) | Non-inverting Input | Differential input node; supports rail-to-rail common-mode range (GND to VS). |
| Pin 4 (–V) | Negative Supply / GND | Reference node for single-supply operation; connects to system ground. |
| Pin 5 | No Connect | Unused terminal; no internal connection; leave unconnected. |
| Pin 6 (+V) | Positive Supply | Accepts 2.7 V to 12 V; PSRR ≥75 dB ensures immunity to supply ripple. |
| Pin 7 (OUTA) | Amplifier Output | Delivers rail-to-rail swing; capable of ±8.75 mA short-circuit current. |
| Pin 8 | No Connect | Unused terminal; must remain unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3 V supply in multistage filters and sensor front-ends without external level-shifting circuitry. |
| Input overvoltage tolerance | Withstands input voltages up to GND −10 V or VS +10 V without damage or phase inversion, simplifying protection design. |
| Micropower operation | 350 μA typical supply current allows integration into always-on battery-powered nodes with multi-year runtime. |
| No phase reversal | Eliminates output glitches during input overdrive or power-up sequencing, critical for closed-loop control stability. |
| Extended temperature range | Specified from −40°C to +125°C - qualified for under-hood automotive, industrial process, and outdoor sensor applications. |
Applications
| Industrial Process Control | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Signal conditioning for 4–20 mA loop-powered transmitters in chemical plant monitoring. IC Role / Device Role / Timing Role: Precision current-to-voltage conversion and buffer for low-drift RTD or thermocouple front-ends. Use Value: Rail-to-rail input accepts 0–5 V sensor outputs directly; 700 μV max offset minimizes calibration burden across temperature. |
Use Scenario: Portable handheld multimeter with auto-ranging analog front-end. IC Role / Device Role / Timing Role: Low-noise, low-power amplifier for ADC driver stage in 3.3 V battery-operated system. Use Value: 300 μA supply current extends battery life; 3 MHz bandwidth supports fast settling for 100 kSPS sampling. |
| Power Supply Control & Protection | DAC Output Amplification |
|
Use Scenario: Overvoltage/overcurrent monitor in isolated DC-DC converter feedback path. IC Role / Device Role / Timing Role: High-side current sense amplifier with rail-to-rail output driving comparator input. Use Value: Input withstands 10 V beyond supply; output swings to within 10 mV of GND enables accurate zero-current detection. |
Use Scenario: Post-DAC amplification for 12-bit voltage-output DAC in programmable power supply. IC Role / Device Role / Timing Role: Unity-gain buffer with rail-to-rail swing to deliver full 0–3.3 V DAC range to load. Use Value: 0.5 V/μs slew rate supports ≤100 kHz full-scale step response; low offset avoids DAC code-dependent errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP193GS-REEL | Lower input offset (250 μV max), higher supply current (550 μA), same 3 MHz GBW and rail-to-rail I/O. | Better DC accuracy but higher power draw; unsuitable for ultra-low-power nodes requiring <400 μA. | Select OP193GS-REEL only when offset-critical precision outweighs micropower constraints. |
| AD8605ARTZ-REEL7 | Higher GBW (10 MHz), lower noise (12 nV/√Hz), but requires ≥2.7 V and draws 1 mA - not rail-to-rail input. | Lacks rail-to-rail input; cannot accept signals near GND or VS without external biasing. | Choose AD8605ARTZ-REEL7 for higher-speed, lower-noise applications where input range permits biasing. |
Compared with OP191GS-REEL, OP193GS-REEL trades 250 μA extra supply current for 450 μV lower offset, while AD8605ARTZ-REEL7 offers speed and noise advantages but forfeits true rail-to-rail input capability - making OP191GS-REEL uniquely suited for wide-dynamic-range, battery-constrained sensor interfaces.
Availability
OP191GS-REEL is available at Aetrix Electronics and suitable for industrial process control, battery-powered instrumentation, and power supply control applications requiring stable component supply, extended temperature qualification, and long-term production continuity.
Supply support for OP191GS-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 OP191 family belongs to Analog Devices' micropower precision op amp product line, engineered specifically for single-supply, rail-to-rail signal conditioning in space- and power-constrained industrial and portable systems.
FAQ
What is the maximum operating supply voltage for OP191GS-REEL?
The absolute maximum supply voltage for OP191GS-REEL is 16 V, but its guaranteed operational range is 2.7 V to 12 V. Operation above 12 V voids parametric guarantees; sustained use at 16 V risks reliability degradation. The OP191GS-REEL datasheet specifies performance only within the 2.7–12 V range, and all electrical characteristics-including bandwidth, slew rate, and offset-are validated across that window.
Does OP191GS-REEL support true rail-to-rail input with a 3 V supply?
Yes, OP191GS-REEL supports true rail-to-rail input common-mode range from GND to VS (0 V to 3 V) under all operating conditions. Its unique dual-input-stage architecture ensures linear operation and no phase reversal across this full range-even at −40°C to +125°C. This allows direct interfacing with 3 V-output sensors like Hall effect or piezoelectric transducers without external bias networks.
Can OP191GS-REEL drive a 2 kΩ load while maintaining rail-to-rail output swing?
At 3 V supply, OP191GS-REEL delivers output swing of 2.70 V to 2.80 V (high side) and 40–75 mV (low side) into a 2 kΩ load - confirming functional rail-to-rail behavior with <300 mV total headroom. While not millivolt-level at full load, this swing preserves >90% of 3 V dynamic range and meets requirements for most 12-bit ADC drivers and analog comparators.
Is OP191GS-REEL qualified for automotive applications?
OP191GS-REEL is specified for −40°C to +125°C operating temperature and qualified per industrial reliability standards, but it is not AEC-Q200 certified. It has been deployed in non-safety-critical automotive subsystems (e.g., cabin climate sensors, infotainment power management), though AEC-Q200-compliant alternatives like AD8603ARZ are recommended for ASIL-B or higher applications.
What is the input bias current behavior of OP191GS-REEL near the positive rail?
OP191GS-REEL exhibits a well-characterized input bias current crossover near VS − 1.2 V: below that threshold, bias current flows *out* of the inputs (PNP stage active); above it, bias current flows *in* (NPN stage active). At VCM = 2.9 V with VS = 3 V, typical bias current is +65 nA - fully documented in Figure 12 of the OP191/OP291/OP491 Rev. E datasheet and stable across temperature.
OP191GS-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:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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
OP191GS-REEL FAQ
1.How can I place an order for OP191GS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for OP191GS-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 OP191GS-REEL reliable?
The price and inventory of OP191GS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP191GS-REEL is usually 5 days.
3.What payment methods are accepted for OP191GS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP191GS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP191GS-REEL?
OP191GS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP191GS-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 OP191GS-REEL?
For technical support, including OP191GS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP191GS-REEL requirements.
6.How does Aetrix verify that OP191GS-REEL is sourced from the original manufacturer or authorized distributors?
All OP191GS-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 OP191GS-REEL meets industry standards.
7.What is the process for return or replacement of OP191GS-REEL?
All OP191GS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with OP191GS-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 OP191GS-REEL part is unused and in its original packaging.
Return procedure for OP191GS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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