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Analog Devices Inc. OP495GSZ
- Part No.:
- OP495GSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
OP495GSZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:557
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Product details
Overview
OP495GSZ from Analog Devices is a quad rail-to-rail output operational amplifier optimized for precision, low-power, single-supply operation across 3 V to 36 V. It delivers 300 μV max offset voltage (5 V), 75 kHz gain bandwidth product, 1000 V/mV open-loop gain, ±15 mA output drive, and rail-to-rail swing - enabling high-accuracy sensor conditioning and actuator control in battery-powered industrial instrumentation.
For engineers reviewing the OP495GSZ datasheet, OP495GSZ pinout, OP495GSZ application, or OP495GSZ equivalent, key selection criteria include its guaranteed rail-to-rail output swing at 3 V, 150 μA per amplifier supply current, −40°C to +125°C extended temperature rating, stability with >300 pF capacitive loads, and compatibility with inductive and heavy resistive loads in servo and power control circuits.
Technical Context
The OP495GSZ uses a bipolar front-end architecture to achieve lower noise and higher dc accuracy than CMOS rail-to-rail op amps, while retaining rail-to-rail output capability. Its input common-mode range includes the negative supply rail (0 V at 3 V operation), enabling true zero-in/zero-out functionality in single-supply systems.
It features unity-gain stability, 83°–86° phase margin, and robust capacitive load drive (>300 pF), making it suitable for driving coax cables, FET gates, and H-bridge transistors without external compensation - unlike many CMOS alternatives that oscillate under similar conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V (±1.5 V to ±18 V) - supports direct lithium battery (3.3 V), industrial 24 V, and dual-rail ±15 V systems |
| Offset Voltage (max) | 300 μV at 5 V, 800 μV over −40°C to +125°C - enables <0.01% error in 12-bit DAC buffer or RTD amplifier applications |
| Gain Bandwidth Product | 75 kHz - sufficient for DC-coupled sensor signal chains, servo loop compensation, and slow-settling reference buffers |
| Output Drive Current | ±15 mA at ±15 V, ±11 mA at ±5 V - directly drives power transistors, LEDs, and small solenoids without external buffers |
| Rail-to-Rail Output Swing | Within 2 mV of GND and within 20 mV of V+ at 10 kΩ load - ensures full dynamic range utilization in 3 V–5 V ADC interfaces |
| Supply Current per Amp | 150 μA max (−40°C to +125°C) - allows four-channel operation at <600 μA total, critical for multi-sensor battery nodes |
| Capacitive Load Stability | Stable with >300 pF - eliminates need for isolation resistors when driving long traces, FET gates, or coaxial cables |
Pinout & Package
OP495GSZ is housed in a 16-lead SOIC_W (RW-16) package with 1.27 mm pitch, 10.3 mm × 7.5 mm body, and exposed pad thermal design. Pin 1 is OUT A; pins 8 and 9 are no-connect (NC); V+ is on pin 4; V− is on pin 13.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - capable of sourcing/sinking ±15 mA into 10 kΩ load with rail-to-rail swing |
| 2 | −IN A | Inverting input of Amp A - high-impedance node (IB = 8 nA typ) for precision feedback networks |
| 3 | +IN A | Noninverting input of Amp A - accepts signals from 0 V to V− + 2 V (e.g., ground-referenced sensors) |
| 4 | V+ | Positive supply rail - connects to main system supply (3–36 V); decoupling capacitor required |
| 5 | +IN B | Noninverting input of Amp B - electrically isolated from other inputs; supports independent signal paths |
| 6 | −IN B | Inverting input of Amp B - matched bias current to −IN A for common-mode rejection in differential pairs |
| 7 | OUT B | Amplifier B output - identical performance to OUT A; usable for dual-channel instrumentation or redundancy |
| 8, 9 | NC | No connect - must be left floating; not internally bonded or tested |
| 10 | OUT C | Amplifier C output - fully independent channel; supports 3-channel signal conditioning in one package |
| 11 | −IN C | Inverting input of Amp C - supports individual gain-setting resistors per channel |
| 12 | +IN C | Noninverting input of Amp C - referenced to local ground or bias network |
| 13 | V− | Negative supply rail - tied to GND in single-supply use; supports split-rail operation down to −18 V |
| 14 | +IN D | Noninverting input of Amp D - enables fourth independent analog path (e.g., reference buffer + 3 sensor amps) |
| 15 | −IN D | Inverting input of Amp D - matches input characteristics of other amplifiers for consistent layout |
| 16 | OUT D | Amplifier D output - completes quad configuration; usable for active filtering or level-shifting |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 0 V to V+ output range at 10 kΩ load - maximizes ADC input utilization and reduces headroom loss in 3.3 V systems |
| Bipolar front-end architecture | Enables 51 nV/√Hz voltage noise density and 300 μV offset - outperforms CMOS equivalents in precision dc-coupled applications |
| Extended temperature range | Specified from −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor sensor nodes |
| Capacitive load stability | Operates stably with >300 pF loads - eliminates need for series gate resistors when driving power FETs or long PCB traces |
| Low quiescent current | 150 μA per amplifier at full temperature range - enables always-on monitoring with multi-year battery life in remote nodes |
Applications
| Battery-Powered Sensor Conditioning | Servo Amplifier for Actuators |
|---|---|
Use Scenario: Amplifying low-level outputs from thermocouples, RTDs, or strain gauges in portable handheld meters or wireless sensor nodes powered by 3.3 V Li-ion batteries. IC Role / Device Role / Timing Role: Quad amplifier provides dedicated channels for sensor excitation, differential amplification, reference buffering, and output level-shifting - all within one SOIC_W package. Use Value: Rail-to-rail swing and 300 μV offset ensure full-scale utilization of 12-bit ADCs; 150 μA per amp extends battery life beyond 5 years in sleep-wake cycles. | Use Scenario: Driving bidirectional H-bridge circuits controlling linear actuators or small DC motors in industrial automation panels operating from 24 V supplies. IC Role / Device Role / Timing Role: OP495GSZ acts as the interface between microcontroller PWM outputs and discrete NPN/PNP transistor pairs - providing rail-aligned logic-level drive and fast turn-on/turn-off. Use Value: ±15 mA output drive and rail-to-rail swing reduce transistor saturation time, increasing mechanical response speed and system efficiency by >12% vs. standard op amps. |
| Single-Supply Instrumentation Amplifier | 4–20 mA Current Loop Transmitter |
Use Scenario: Building compact, low-drift instrumentation amplifiers for pressure or flow transducers in process control systems requiring 3 V or 5 V single-supply operation. IC Role / Device Role / Timing Role: Two OP495GSZ amplifiers configure as precision difference amplifier with gain-setting resistor; third buffers reference; fourth handles output filtering. Use Value: Input common-mode range including ground and 1000 V/mV open-loop gain enable >80 dB CMRR with standard 0.1% resistors - eliminating need for expensive laser-trimmed ICs. | Use Scenario: Implementing self-powered 4–20 mA transmitters for temperature or humidity sensors in hazardous-area field devices powered from 12–36 V loop supplies. IC Role / Device Role / Timing Role: OP495GSZ serves as the core current-summing amplifier and voltage-to-current converter - regulating loop current via feedback across sense resistor. Use Value: 150 μA quiescent current leaves >2.6 mA headroom for sensor excitation and signal conditioning; rail-to-rail swing ensures compliance across full 12–36 V supply range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP491GSZ | Lower GBP (120 kHz), higher supply current (350 μA/amp), same rail-to-rail output but no guaranteed 3 V operation | Better for higher-speed signal conditioning where power budget allows; unsuitable for sub-3.3 V battery systems | Select OP491GSZ only if bandwidth >100 kHz is required and supply current >350 μA/amp is acceptable |
| AD8604ARUZ | CMOS input (IB = 0.5 pA), lower noise (12 nV/√Hz), but limited output swing (100 mV from rails at 5 V) and no 3 V min spec | Ideal for ultra-high-impedance pH or photodiode sensors; cannot replace OP495GSZ in zero-in/zero-out or heavy-load drive roles | Choose AD8604ARUZ for femtoampere-input applications with clean supplies; avoid where rail-to-rail swing or 3 V operation is mandatory |
Compared with OP491GSZ and AD8604ARUZ, OP495GSZ uniquely combines guaranteed 3 V operation, rail-to-rail output swing, 150 μA quiescent current, and bipolar precision - making it the only option among the three qualified for battery-powered RTD thermometers, 4–20 mA transmitters, and servo drivers requiring zero-volt output capability.
Availability
OP495GSZ 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 voltage ranges.
Supply support for OP495GSZ 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 OP495GSZ belongs to Analog Devices' precision rail-to-rail op amp family designed specifically for low-power, wide-supply, extended-temperature industrial sensing and control - emphasizing dc accuracy, output drive, and single-supply usability.
FAQ
What is the minimum supply voltage for reliable operation of the OP495GSZ?
The OP495GSZ is fully specified for operation down to 3 V (±1.5 V), with rail-to-rail output swing, 300 μV max offset, and 150 μA supply current maintained across −40°C to +125°C. At 3 V, the input common-mode range extends from 0 V to 2.0 V, and output swing reaches 2.9 V high and 2 mV low into 10 kΩ - making OP495GSZ suitable for direct integration with lithium coin cells and 3.3 V microcontrollers.
Does the OP495GSZ support true zero-in/zero-out operation in single-supply configurations?
Yes. The OP495GSZ's input common-mode range includes the negative supply rail (0 V at 3 V operation), and its output swings within 2 mV of GND and within 20 mV of V+. This enables true zero-in/zero-out behavior - critical for applications like RTD bridges, thermocouple cold-junction compensation, and single-supply instrumentation amplifiers where ground-referenced inputs and full-scale output utilization are required.
Can the OP495GSZ drive capacitive loads such as coaxial cables or MOSFET gates without oscillation?
Yes. The OP495GSZ is explicitly characterized for stability with capacitive loads exceeding 300 pF, thanks to its internal compensation and bipolar output stage. This eliminates the need for external isolation resistors when driving long PCB traces, coaxial cables, or power FET gates - a key advantage over many CMOS rail-to-rail op amps that require external compensation above 50 pF.
What is the maximum output current capability of the OP495GSZ at different supply voltages?
At ±15 V supply, OP495GSZ delivers ±15 mA source/sink into 10 kΩ; at ±5 V, it provides ±11 mA. Under single-supply 5 V operation, output swing remains rail-to-rail (0.002 V to 4.98 V) with ±11 mA drive - sufficient to directly drive small relays, LEDs, and power transistors in H-bridge configurations without external buffers.
Is the OP495GSZ pin-compatible with other quad op amps like the LM324 or AD8604?
No. OP495GSZ uses a 16-lead SOIC_W (RW-16) package with NC pins at positions 8 and 9, differing from the 14-lead PDIP/SOIC of LM324 and the 14-lead TSSOP of AD8604. Its pinout is unique to the OP295/OP495 family - requiring PCB redesign for replacement. Functional substitution is possible only after verifying rail-to-rail swing, 3 V operation, and capacitive load stability requirements.
OP495GSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- 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:
- 16-SOIC
OP495GSZ FAQ
1.How can I place an order for OP495GSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP495GSZ 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 OP495GSZ reliable?
The price and inventory of OP495GSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP495GSZ is usually 5 days.
3.What payment methods are accepted for OP495GSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP495GSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP495GSZ?
OP495GSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP495GSZ 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 OP495GSZ?
For technical support, including OP495GSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP495GSZ requirements.
6.How does Aetrix verify that OP495GSZ is sourced from the original manufacturer or authorized distributors?
All OP495GSZ 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 OP495GSZ meets industry standards.
7.What is the process for return or replacement of OP495GSZ?
All OP495GSZ units undergo pre-shipment inspection (PSI). If there is an issue with OP495GSZ, 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 OP495GSZ part is unused and in its original packaging.
Return procedure for OP495GSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OP495GSZ Tags
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