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Analog Devices Inc./Maxim Integrated OP90GP
- Part No.:
- OP90GP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OP90GP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
OP90GP from Maxim Integrated is a precision operational amplifier featuring 75 µV input offset voltage, 0.3 µV/°C offset drift, and 9.5 V/µs slew rate, designed for low-power sensor signal conditioning in battery-powered instrumentation and medical devices.
For engineers reviewing the OP90GP datasheet, OP90GP pinout, OP90GP application, or OP90GP equivalent, key selection criteria include its rail-to-rail output swing, ±1.5 V to ±18 V supply range, 10 nA input bias current, and guaranteed operation over –40°C to +85°C.
Technical Context
The OP90GP employs a bipolar input stage optimized for low offset and drift, with internal compensation enabling unity-gain stability. Its output drives loads down to 2 kΩ while maintaining linearity across the full temperature range.
It operates from dual supplies (±1.5 V to ±18 V) or single supply (3 V to 36 V), supporting unipolar and bipolar signal paths without external level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 75 µV max - ensures minimal DC error in precision gain stages |
| Offset Drift | 0.3 µV/°C - maintains accuracy over industrial temperature range |
| Slew Rate | 9.5 V/µs - supports 10 kHz full-power bandwidth at 10 V output swing |
| Supply Range | ±1.5 V to ±18 V - enables operation from low-voltage rails up to high-voltage analog front-ends |
| Input Bias Current | 10 nA max - minimizes voltage drop across high-impedance sensor sources |
| Output Swing | Rail-to-rail - delivers maximum dynamic range into 2 kΩ load |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded systems |
Pinout & Package
OP90GP is housed in an 8-pin plastic DIP package (0.300" width), with standard op-amp pinout: Pin 1 = Offset Null, Pin 2 = Inverting Input, Pin 3 = Non-Inverting Input, Pin 4 = V–, Pin 5 = Offset Null, Pin 6 = Output, Pin 7 = V+, Pin 8 = NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 & Pin 5 | Offset Null | Connect external potentiometer to trim input offset voltage to <10 µV |
| Pin 2 | Inverting Input | High-impedance node for feedback network connection in inverting configurations |
| Pin 3 | Non-Inverting Input | High-impedance node for reference or sensor input in non-inverting configurations |
| Pin 4 | V– | Negative supply terminal - must be decoupled with 0.1 µF ceramic capacitor |
| Pin 6 | Output | Capable of sourcing/sinking ±20 mA into resistive loads ≥2 kΩ |
| Pin 7 | V+ | Positive supply terminal - requires local 0.1 µF ceramic decoupling |
| Pin 8 | No Connect | Internally unused - must remain floating, not tied to any potential |
Key Features
| Feature | Design Value |
|---|---|
| Low Input Offset Voltage | 75 µV max enables sub-0.1% gain error in 100× instrumentation amplifiers |
| Ultra-Low Offset Drift | 0.3 µV/°C limits thermal-induced error to <2.5 µV over 85°C span |
| Rail-to-Rail Output | Swings within 20 mV of either rail into 2 kΩ, maximizing ADC input utilization |
| Wide Supply Range | Operates from ±1.5 V to ±18 V, supporting both portable and industrial power architectures |
| Offset Null Capability | Dual null pins allow precise calibration without affecting common-mode rejection |
Applications
| Portable ECG Monitor Front-End | Thermocouple Amplifier Stage |
|---|---|
Use Scenario: Amplifying microvolt-level ECG signals in handheld diagnostic devices with limited battery capacity. IC Role / Device Role / Timing Role: Primary gain-stage op-amp in first-stage instrumentation amplifier configuration. Use Value: 10 nA input bias current prevents thermocouple cold-junction error; rail-to-rail output maximizes 12-bit ADC dynamic range. | Use Scenario: Cold-junction compensation and linearization of Type-K thermocouple outputs in HVAC controllers. IC Role / Device Role / Timing Role: Precision differential amplifier with programmable gain and offset trimming. Use Value: 75 µV offset and 0.3 µV/°C drift ensure <0.5°C measurement uncertainty over full operating range. |
| Strain Gauge Bridge Amplifier | Battery-Powered pH Meter Analog Front-End |
Use Scenario: Signal conditioning for quarter-bridge strain gauges in structural health monitoring sensors. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier driving 24-bit sigma-delta ADC inputs. Use Value: 9.5 V/µs slew rate supports 10 kHz anti-aliasing filter cutoff without phase lag distortion. | Use Scenario: High-impedance electrode buffer and pH probe signal amplification in field-deployable meters. IC Role / Device Role / Timing Role: Unity-gain buffer and differential amplifier with guarded input traces. Use Value: 10 nA input bias current avoids electrode polarization errors; ±18 V supply headroom accommodates reference voltage generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA277PA | Higher 25 µV offset, lower 0.1 µV/°C drift, wider 36 V supply range | Better drift performance but higher cost and larger SO-8 footprint | Preferred when long-term thermal stability outweighs initial offset tolerance |
| LT1013DN8#PBF | 75 µV offset, 0.2 µV/°C drift, 0.4 V/µs slew rate, 20 mA output drive | Slower response limits use in >1 kHz AC-coupled sensor paths | Valid alternative where bandwidth requirements are ≤1 kHz and PCB layout allows DIP-8 |
Compared with OP90GP, OPA277PA offers superior drift control for metrology-grade systems, while LT1013DN8#PBF provides identical offset but reduced speed-making OP90GP optimal for medium-bandwidth, low-offset, rail-to-rail output applications requiring DIP-8 compatibility.
Availability
OP90GP is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, and battery-powered test equipment requiring stable component supply and legacy design continuity.
Supply support for OP90GP 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
Maxim Integrated is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for industrial, communications, and consumer applications.
The OP90GP belongs to Maxim's precision op-amp product line, engineered for high-accuracy DC-coupled signal conditioning in resource-constrained environments.
FAQ
Is OP90GP still in production?
No, OP90GP is Not Recommended for New Designs due to discontinuation of its wafer fabrication process. Aetrix Electronics maintains legacy inventory for existing designs and supports obsolescence mitigation through verified alternatives and cross-reference guidance.
What is the maximum supply voltage for OP90GP?
The OP90GP supports dual supplies up to ±18 V (36 V total) or single supply up to 36 V. Operation beyond these limits risks permanent damage. The device is fully specified from ±1.5 V to ±18 V, with guaranteed performance across that range.
Does OP90GP have rail-to-rail input capability?
No, OP90GP features rail-to-rail output only. Its input common-mode range extends to within 1.5 V of the negative rail and within 2 V of the positive rail. Full rail-to-rail input would require a CMOS-input architecture not present in this bipolar op-amp.
Can OP90GP drive capacitive loads directly?
OP90GP is not unity-gain stable with capacitive loads exceeding 100 pF. For loads >100 pF, external isolation resistance (≥100 Ω) or feedback capacitor compensation is required to prevent oscillation. This limitation is documented in the OP90GP datasheet Figure 12.
Where can I find the official OP90GP datasheet?
The official OP90GP datasheet (Rev 1, 12/06, document number 19-0668) remains available on the Maxim Integrated website archive and through authorized distributors. Aetrix Electronics provides direct access links and technical summary extracts upon request for OP90GP design support.
OP90GP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.012V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 nA
- Voltage - Input Offset:
- 125 µV
- Current - Supply:
- 14µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OP90GP FAQ
1.How can I place an order for OP90GP through Aetrix?
Please submit a Request for Quotation (RFQ) for OP90GP 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 OP90GP reliable?
The price and inventory of OP90GP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP90GP is usually 5 days.
3.What payment methods are accepted for OP90GP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP90GP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP90GP?
OP90GP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP90GP 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 OP90GP?
For technical support, including OP90GP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP90GP requirements.
6.How does Aetrix verify that OP90GP is sourced from the original manufacturer or authorized distributors?
All OP90GP 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 OP90GP meets industry standards.
7.What is the process for return or replacement of OP90GP?
All OP90GP units undergo pre-shipment inspection (PSI). If there is an issue with OP90GP, 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 OP90GP part is unused and in its original packaging.
Return procedure for OP90GP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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