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Analog Devices Inc. OP295GS-REEL
- Part No.:
- OP295GS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP295GS-REEL.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
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Product details
Overview
OP295GS-REEL from Analog Devices is a dual rail-to-rail output operational amplifier optimized for low-power, single-supply instrumentation and sensor conditioning. It delivers 300 μV max offset voltage at 5 V, 75 kHz gain bandwidth product, ±11 mA output drive, and operates from 3 V to 36 V supply. Its zero-in/zero-out capability enables precision DC-coupled designs in battery-powered servo amplifiers and RTD signal chains.
For engineers reviewing the OP295GS-REEL datasheet, OP295GS-REEL pinout, OP295GS-REEL application, or OP295GS-REEL equivalent, key selection criteria include rail-to-rail output swing under 3 V operation, 150 μA per amplifier supply current, −40°C to +125°C extended industrial temperature range, and stability with >300 pF capacitive loads - critical for H-bridge gate driving and coaxial cable interfacing.
Technical Context
The OP295GS-REEL uses a bipolar front-end architecture to achieve lower noise (51 nV/√Hz at 1 kHz) and higher dc accuracy than CMOS rail-to-rail op amps, while retaining rail-to-rail output swing. Its input common-mode range extends to the negative rail and within ~800 mV of the positive rail, enabling true zero-in/zero-out operation in 3 V systems.
It features unity-gain stability, 1000 V/mV minimum open-loop gain, and robust capacitive load drive (stable up to 300 pF), distinguishing it from typical CMOS amplifiers that require isolation resistors for similar loads. The device is specified across −40°C to +125°C with guaranteed performance at 3 V, 5 V, and ±15 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V - supports direct lithium battery (3.3 V) and industrial 24 V rails without level shifting. |
| Offset Voltage (max) | 300 μV at 5 V - enables high-accuracy DC measurement in 12-bit DAC buffers and RTD bridges. |
| Gain Bandwidth Product | 75 kHz - sufficient for low-frequency sensor conditioning (e.g., thermocouple, strain gauge) with stable closed-loop response. |
| Output Drive Current | ±11 mA at ±5 V - drives power transistors, small solenoids, and FET gates directly without external buffers. |
| Supply Current per Amp | 150 μA max (−40°C to +125°C) - allows dual-amplifier operation on <500 μA total, ideal for multi-year battery life. |
| Capacitive Load Stability | Stable with >300 pF - eliminates need for series isolation resistors when driving coax cables or large-gate MOSFETs. |
| Input Common-Mode Range | 0 V to 4.0 V at 5 V supply - includes ground and supports true single-supply zero-input operation. |
Pinout & Package
OP295GS-REEL is packaged in an 8-lead narrow-body SOIC_N (SOIC-8) surface-mount package (S suffix, R-8 outline), measuring 4.9 mm × 3.9 mm × 1.75 mm, with standard JEDEC MS-012AC footprint and moisture sensitivity level 1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A - rail-to-rail swing supports full 0–5 V DAC buffering and actuator control. |
| 2 | –IN A | Inverting input A - high CMRR (90 dB min) ensures rejection of supply noise in single-ended sensor interfaces. |
| 3 | +IN A | Noninverting input A - accepts signals down to V– (ground), enabling true zero-input instrumentation configurations. |
| 4 | V– | Negative supply terminal - tied to GND in single-supply use; supports split-rail operation down to −15 V. |
| 5 | +IN B | Noninverting input B - electrically isolated from Channel A; enables independent dual-channel signal paths. |
| 6 | –IN B | Inverting input B - matched bias current (8–20 nA) minimizes offset drift in differential sensor front-ends. |
| 7 | OUT B | Output B - identical rail-to-rail performance to OUT A; usable for feedback loops or second-stage gain. |
| 8 | V+ | Positive supply terminal - accepts up to +36 V; internal protection enables robust operation in noisy industrial rails. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings within 2 mV of GND and 20 mV of V+ at 5 V/10 kΩ - enables full-scale utilization of 5 V ADC references and 0–4.095 V DAC outputs. |
| Low offset voltage drift | 1–5 μV/°C - maintains calibration integrity over wide temperature ranges in unheated enclosures and automotive under-hood environments. |
| High open-loop gain | ≥500 V/mV (−40°C to +125°C) - ensures <0.1% gain error in unity-gain buffers and precision gain stages with 10 kΩ feedback networks. |
| Single-supply operation | Functional at 3 V with full rail-to-rail swing - eliminates need for charge pumps or dual supplies in portable medical and handheld test equipment. |
| Indefinite output short-circuit duration | Internally protected against sustained shorts - simplifies design of fault-tolerant power supply control and motor driver feedback circuits. |
Applications
| Battery-Powered Sensor Conditioner | Servo Amplifier Feedback Loop |
|---|---|
|
Use Scenario: Signal conditioning for 3.3 V microcontroller-based gas sensors with millivolt-level outputs and strict 10-year battery life requirements. IC Role / Device Role / Timing Role: Dual-channel amplifier: Channel A buffers reference voltage; Channel B performs programmable-gain amplification with rail-to-rail output feeding 12-bit SAR ADC. Use Value: 150 μA per amplifier enables dual-channel operation below 300 μA, extending coin-cell lifetime beyond 8 years; 300 μV offset ensures <0.1% full-scale error at 3.3 V supply. |
Use Scenario: Closed-loop position control of 12 V DC brushed motors in industrial robotic arms requiring precise torque regulation and thermal resilience. IC Role / Device Role / Timing Role: Error amplifier in analog PID loop: compares encoder feedback to command voltage and drives H-bridge gate drivers with rail-to-rail output swing. Use Value: ±11 mA output drive directly sources gate capacitance of discrete N-channel MOSFETs; 300 pF capacitive load stability avoids oscillation during PWM transitions. |
| RTD Thermometer Front-End | 4–20 mA Current Loop Transmitter |
|
Use Scenario: Precision temperature measurement using 3-wire 100 Ω platinum RTD in HVAC control panels operating from 24 VDC with −25°C to +70°C ambient range. IC Role / Device Role / Timing Role: Constant-current source amplifier: servos 200 μA through RTD bridge and conditions differential voltage with instrumentation topology. Use Value: Zero-in/zero-out capability enables ground-referenced bridge excitation; 75 kHz GBW supports 10 Hz filter bandwidth without phase lag-induced instability. |
Use Scenario: Field transmitter converting 0–5 V process sensor output into industry-standard 4–20 mA loop signal powered from 24 V supply with intrinsic safety compliance. IC Role / Device Role / Timing Role: Voltage-to-current converter core: regulates loop current via op-amp-controlled PNP pass transistor with rail-to-rail output ensuring full 4–20 mA span. Use Value: 300 μV offset contributes <0.015% of full-scale error; 150 μA quiescent current leaves >2.5 mA headroom for sensor excitation and diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Chopper-stabilized (0.1 μV offset), 350 kHz GBW, 17 μA supply current - higher precision but lower drive (±25 mA), no guaranteed 3 V rail-to-rail swing. | Better for ultra-low-offset DC applications (e.g., precision weigh scales); unsuitable for >10 mA load drive or 3 V actuator control. | Select OP295GS-REEL when 3 V operation, ±11 mA drive, and 300 pF capacitive load stability are required over sub-μV offset. |
| LMV358IDR | CMOS input (1 pA IB), 1 MHz GBW, 130 μA supply current - wider bandwidth but limited output swing (1.2 V from rails at 5 V), unstable >100 pF. | Preferred for high-impedance pH sensors or fast-response comparators; cannot replace OP295GS-REEL in H-bridge or coax driver roles. | Choose OP295GS-REEL where rail-to-rail output, low-voltage operation, and capacitive load immunity outweigh need for ultra-low input bias current. |
Compared with OPA2333AIDR and LMV358IDR, the OP295GS-REEL uniquely balances 3 V rail-to-rail output, ±11 mA drive, 300 pF stability, and 150 μA quiescent current - making it irreplaceable in battery-powered actuators, RTD bridges, and industrial 4–20 mA transmitters where all four attributes are simultaneously required.
Availability
OP295GS-REEL is available at Aetrix Electronics and suitable for battery-operated instrumentation, servo amplifiers, and 4–20 mA current-loop transmitters requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for OP295GS-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The OP295GS-REEL belongs to Analog Devices' precision operational amplifier product line, engineered for low-power, rail-to-rail output applications in harsh environments - specifically targeting sensor signal chains, portable instrumentation, and industrial control systems demanding dc accuracy and robust output drive.
FAQ
What is the maximum capacitive load the OP295GS-REEL can drive without compensation?
The OP295GS-REEL is specified as stable with capacitive loads exceeding 300 pF, including coaxial cables and large-gate MOSFETs. This eliminates the need for series isolation resistors in most interface applications. Unlike many CMOS rail-to-rail amplifiers, its bipolar output stage provides inherent phase margin retention up to this limit. For loads >300 pF, a small series resistor (10–50 Ω) at the output may be added to ensure stability in high-noise environments. The OP295GS-REEL's stability is verified across −40°C to +125°C and all supply voltages from 3 V to 36 V.
Does the OP295GS-REEL support true single-supply operation down to 3 V?
Yes, the OP295GS-REEL is fully specified and characterized at 3 V operation, with rail-to-rail output swing (VOH = 2.9 V, VOL = 2 mV at RL = 10 kΩ), input common-mode range from 0 V to 2.0 V, and 150 μA maximum supply current per amplifier across −40°C to +125°C. Its bipolar input stage ensures consistent offset and gain behavior at low voltage - unlike many CMOS op amps that degrade significantly below 5 V. This makes the OP295GS-REEL suitable for direct integration with lithium coin cells and 3.3 V microcontrollers without level-shifting circuitry.
What is the guaranteed offset voltage specification for OP295GS-REEL over temperature?
The OP295GS-REEL guarantees a maximum input offset voltage of 800 μV over the full −40°C to +125°C industrial temperature range at 5 V supply. At room temperature (25°C), the typical offset is 30 μV with a maximum of 300 μV. Its offset voltage drift is specified at 1–5 μV/°C, enabling predictable calibration in unheated enclosures. These values are measured per channel and apply independently to both amplifiers in the dual package, supporting matched performance in differential sensor interfaces and instrumentation amplifiers.
Can OP295GS-REEL drive an H-bridge directly without external transistors?
The OP295GS-REEL can directly drive small-signal H-bridges (e.g., discrete NPN/PNP pairs or logic-level MOSFETs with <1 nF total gate capacitance) due to its ±11 mA output current at 5 V and rail-to-rail swing. However, for power H-bridges requiring >20 mA peak gate current or >100 ns switching, external buffer transistors remain necessary. Its 300 pF capacitive load stability ensures clean gate drive waveforms without ringing. In practice, the OP295GS-REEL is commonly used to drive the bases/gates of complementary emitter-follower or source-follower stages in compact servo amplifier designs.
Is OP295GS-REEL pin-compatible with other dual op amp packages in SOIC-8?
The OP295GS-REEL uses the standard 8-lead narrow-body SOIC_N (R-8) footprint with pin 1 at top-left, matching industry-standard dual op amp layouts (e.g., LM358, TL072, OPA2333). Pin functions are identical: OUT A (1), –IN A (2), +IN A (3), V– (4), +IN B (5), –IN B (6), OUT B (7), V+ (8). No PCB redesign is needed when upgrading from functionally similar dual amplifiers, provided the application does not rely on features absent in OP295GS-REEL - such as rail-to-rail input or sub-100 μA supply current.
OP295GS-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:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.03V/µs
- Gain Bandwidth Product:
- 75 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- -
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP295GS-REEL FAQ
1.How can I place an order for OP295GS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for OP295GS-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 OP295GS-REEL reliable?
The price and inventory of OP295GS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP295GS-REEL is usually 5 days.
3.What payment methods are accepted for OP295GS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP295GS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP295GS-REEL?
OP295GS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP295GS-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 OP295GS-REEL?
For technical support, including OP295GS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP295GS-REEL requirements.
6.How does Aetrix verify that OP295GS-REEL is sourced from the original manufacturer or authorized distributors?
All OP295GS-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 OP295GS-REEL meets industry standards.
7.What is the process for return or replacement of OP295GS-REEL?
All OP295GS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with OP295GS-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 OP295GS-REEL part is unused and in its original packaging.
Return procedure for OP295GS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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