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Analog Devices Inc./Maxim Integrated OP90GS+
- Part No.:
- OP90GS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP90GS+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:35,845
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Product details
Overview
OP90GS+ from Maxim Integrated is a precision operational amplifier featuring 75 µV input offset voltage, 0.3 µV/°C offset drift, and 10 V/µs slew rate, designed for low-power, high-accuracy signal conditioning in battery-powered instrumentation and sensor front-ends.
For engineers reviewing the OP90GS+ datasheet, OP90GS+ pinout, OP90GS+ application, or OP90GS+ equivalent, key selection considerations include its rail-to-rail output swing, ±1.5 V to ±18 V supply range, 10 kHz gain-bandwidth product, and SO-8 package compatibility with legacy analog signal chains.
Technical Context
The OP90GS+ employs a bipolar input stage delivering low input bias current (100 pA typical) and low noise (1.8 µVpp in 0.1–10 Hz band), enabling high-impedance source interfacing without significant error contribution. Its internal compensation ensures unity-gain stability across temperature and load variations.
It operates over –40°C to +85°C and maintains specified performance with supply voltages as low as ±1.5 V, supporting dual-supply portable systems where headroom and power efficiency are critical design constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 75 µV max - enables accurate DC-coupled amplification of mV-level sensor signals without calibration |
| Offset Drift | 0.3 µV/°C max - minimizes thermal-induced error in unregulated ambient environments |
| Slew Rate | 10 V/µs - supports faithful reproduction of 10 kHz sine waves at ±10 V output swing |
| Gain-Bandwidth Product | 10 kHz - suitable for low-frequency precision filtering and DC-stable closed-loop gains up to 1000 |
| Supply Voltage Range | ±1.5 V to ±18 V - allows operation from single 3 V to dual ±15 V rails without external regulation |
| Input Bias Current | 100 pA typical - preserves signal integrity when driving from high-impedance sources (e.g., pH electrodes) |
| Output Swing | Rail-to-rail - delivers full dynamic range into 10 kΩ loads, maximizing ADC utilization |
Pinout & Package
OP90GS+ is housed in an 8-pin SOIC (SO-8) package with standard operational amplifier pinout and 1.27 mm pitch. Thermal pad is not present; JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null | Adjusts input stage imbalance; unused in most applications but required for sub-10 µV offset tuning |
| 2 | Inverting Input | Accepts feedback network connection; high-impedance node sensitive to PCB leakage |
| 3 | Non-Inverting Input | Reference input for differential gain stages; matched trace routing recommended |
| 4 | V– | Negative supply terminal; must be decoupled within 1 cm of pin with 0.1 µF ceramic |
| 5 | Offset Null | Second null adjustment terminal; used with Pin 1 for symmetric offset trimming |
| 6 | Output | Delivers amplified signal; capable of sourcing/sinking ±20 mA into resistive loads |
| 7 | V+ | Positive supply terminal; requires local 0.1 µF ceramic bypass capacitor |
| 8 | NC | No internal connection; left unconnected per datasheet; not usable as thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Low Input Offset Voltage | 75 µV max ensures ≤0.075% gain error in unity-gain buffer configurations |
| Rail-to-Rail Output | Swings within 20 mV of either rail at 10 kΩ load, preserving full-scale ADC resolution |
| Ultra-Low Input Bias Current | 100 pA typical avoids loading errors in photodiode or piezoelectric transducer interfaces |
| Wide Supply Range | Operates from ±1.5 V to ±18 V, eliminating need for dedicated ±5 V supplies in mixed-voltage systems |
| Stable at Unity Gain | Internally compensated for stable operation with no external components in G = 1 configuration |
Applications
| Medical Instrumentation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-amplitude ECG electrode signals in portable patient monitors. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with adjustable gain and offset nulling. Use Value: 75 µV offset and 0.3 µV/°C drift ensure baseline stability over 8-hour clinical sessions without recalibration. | Use Scenario: Conditioning bridge outputs from strain gauges in load-cell-based weighing systems. IC Role / Device Role / Timing Role: Low-drift, low-noise difference amplifier with programmable gain via external resistors. Use Value: 100 pA input bias current prevents bridge imbalance errors caused by leakage paths in humid industrial enclosures. |
| Portable Data Acquisition | Battery-Powered Environmental Sensors |
Use Scenario: Signal amplification in handheld multimeters with auto-ranging and true RMS conversion. IC Role / Device Role / Timing Role: Rail-to-rail output buffer driving SAR ADC reference inputs with minimal headroom loss. Use Value: ±1.5 V minimum supply enables operation from two AA cells, extending battery life beyond 200 hours. | Use Scenario: Amplifying thermistor and RTD signals in wireless soil moisture and temperature nodes. IC Role / Device Role / Timing Role: Low-power, high-impedance sensor interface amplifier with shutdown control. Use Value: 10 kHz GBW and 10 V/µs slew rate support fast settling during periodic wake-up sampling cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP97GP | Higher input offset (25 µV typ), lower slew rate (0.2 V/µs), same SO-8 package | Better for ultra-low-noise DC applications; unsuitable for >1 kHz signal bandwidths | Select OP97GP only when offset drift and noise dominate over speed requirements |
| AD8603ARZ | Rail-to-rail input/output, 1 µV offset, but limited to 5.5 V max supply and higher quiescent current | Optimized for single-supply 3.3 V systems; incompatible with ±15 V legacy designs | Choose AD8603ARZ for new low-voltage designs requiring sub-µV offset, not for drop-in replacement |
Compared with OP90GS+, OP97GP trades speed for lower noise and drift, while AD8603ARZ offers superior offset but sacrifices supply flexibility and thermal robustness-neither is pin-compatible, and both require layout and supply redesign.
Availability
OP90GS+ is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and portable data acquisition requiring stable component supply despite end-of-life status.
Supply support for OP90GS+ 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 power, sensing, and communication applications.
The OP90GS+ belongs to Maxim's precision op-amp product line, engineered for high-accuracy, low-power analog signal processing in measurement and control systems where long-term stability is critical.
FAQ
Is OP90GS+ still in production?
No, OP90GS+ is Not Recommended for New Designs due to discontinuation of its wafer fabrication process. Aetrix Electronics maintains limited legacy stock for existing designs, with full traceability and documentation. Maxim no longer manufactures OP90GS+, and no new wafers are planned. Customers should consult Maxim's technical support for migration paths before initiating new projects involving OP90GS+.
What is the maximum operating temperature for OP90GS+?
The OP90GS+ is rated for operation from –40°C to +85°C ambient temperature. This range is validated per Maxim's original characterization and applies to all electrical specifications in the datasheet. Operation outside this range may cause parametric shift or reliability degradation. The SO-8 package has no integrated thermal protection, so board-level heatsinking is not applicable.
Does OP90GS+ support rail-to-rail input?
No, OP90GS+ 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 under ±15 V supply. It does not accept inputs at the supply rails. For true rail-to-rail input capability, consider alternatives like AD8603ARZ-but note that OP90GS+ and AD8603ARZ are not pin-compatible.
Can OP90GS+ drive capacitive loads directly?
OP90GS+ is not optimized for direct capacitive load driving. Driving >100 pF without isolation resistance risks instability and overshoot. For ADC input buffering, use a 10 Ω–100 Ω series resistor between OP90GS+ output and the capacitor. The datasheet specifies stability with purely resistive loads; capacitive load behavior requires empirical validation per application.
Where can I find the official OP90GS+ datasheet?
The official OP90GS+ datasheet (document number 19-0668, Rev 1, dated 12/06) remains available on the Maxim Integrated archive site at maxim-ic.com/archives. Aetrix Electronics provides a verified copy upon request with full revision traceability. No updated versions exist-the Rev 1 datasheet is the final and authoritative specification for OP90GS+.
OP90GS+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP90GS+ FAQ
1.How can I place an order for OP90GS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP90GS+ 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 OP90GS+ reliable?
The price and inventory of OP90GS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP90GS+ is usually 5 days.
3.What payment methods are accepted for OP90GS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP90GS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP90GS+?
OP90GS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP90GS+ 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 OP90GS+?
For technical support, including OP90GS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP90GS+ requirements.
6.How does Aetrix verify that OP90GS+ is sourced from the original manufacturer or authorized distributors?
All OP90GS+ 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 OP90GS+ meets industry standards.
7.What is the process for return or replacement of OP90GS+?
All OP90GS+ units undergo pre-shipment inspection (PSI). If there is an issue with OP90GS+, 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 OP90GS+ part is unused and in its original packaging.
Return procedure for OP90GS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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