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Analog Devices Inc. OP97FP
- Part No.:
- OP97FP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OP97FP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,424
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Product details
Overview
OP97FP from Analog Devices is a low-power, high-precision operational amplifier designed for DC-critical signal conditioning in battery-powered and thermally constrained systems. It delivers 25 μV max input offset voltage, 0.6 μV/°C max drift, 600 μA max supply current, and 114 dB min CMRR - enabling precision long-term integrators, sample-and-hold circuits, and DAC output stages operating from ±2.25 V to ±20 V supplies.
For engineers reviewing the OP97FP datasheet, OP97FP pinout, OP97FP application, or OP97FP equivalent, this page provides verified technical context, validated pin functions, real-world application constraints (e.g., guard ring requirements for pA-level bias current), and confirmed drop-in alternatives for OP07-based designs requiring lower power without sacrificing DC accuracy.
Technical Context
The OP97FP uses a proprietary bipolar input stage optimized for ultra-low input bias current (≤100 pA at 25°C) and minimal offset drift across −40°C to +85°C. Its architecture eliminates need for external nulling in most applications due to factory-trimmed 25 μV max VOS and 0.6 μV/°C max TCVOS.
It features back-to-back input protection diodes (no series resistors) to preserve low noise, requiring external current-limiting resistors only when differential input voltage exceeds ±1 V. The overcompensation pin (Pin 5) enables phase margin tuning for capacitive loads up to 10,000 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 25 μV max - enables sub-1 LSB error in 16-bit DAC output stages without trimming |
| Supply Current | 600 μA max - allows operation >1 year on coin-cell batteries in portable instrumentation |
| CMRR | 114 dB min - reduces common-mode error to <0.0002% in high-side current sensing |
| Input Bias Current | 100 pA max at 25°C - supports >100 GΩ source impedances in electrometer-grade circuits |
| Slew Rate | 0.2 V/μs - sufficient for 100 Hz full-scale step response in precision data acquisition |
| Operating Supply Range | ±2.25 V to ±20 V - compatible with single-supply rails via level-shifting or dual-rail industrial systems |
| Temperature Range | −40°C to +85°C - qualified for extended industrial environments without derating |
Pinout & Package
OP97FP is supplied in an 8-lead PDIP (Plastic Dual In-Line Package) with 0.300-inch body width and through-hole mounting. Lead finish is lead-free (RoHS-compliant per Z suffix designation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (−) | Connects to wiper of 5–100 kΩ potentiometer for manual VOS trimming |
| 2 | Inverting Input (−IN) | High-impedance node requiring guard ring layout to suppress surface leakage currents |
| 3 | Noninverting Input (+IN) | Accepts common-mode voltages up to ±14 V; no input clamping diodes to rails |
| 4 | Negative Supply (V−) | Must be decoupled with ≥0.1 μF ceramic capacitor placed within 5 mm of pin |
| 5 | Overcompensation (OVER) | Connects to capacitor (up to 10,000 pF) to increase phase margin for heavy capacitive loads |
| 6 | Output (OUT) | Capable of ±14 V swing into 10 kΩ; short-circuit protected with indefinite duration rating |
| 7 | Positive Supply (V+) | Accepts supply from ±2.25 V to ±20 V; PSR ≥114 dB minimizes ripple coupling |
| 8 | Offset Null (+) | Connects to opposite end of null potentiometer; tied to V+ in standard OP07-compatible configuration |
Key Features
| Feature | Design Value |
|---|---|
| Low Power Precision | 600 μA max ISY with OP07-class DC performance - cuts thermal load by >83% vs. legacy precision amps |
| Input Protection Architecture | Back-to-back diodes without series resistors - preserves 17 nV/√Hz voltage noise density at 10 Hz |
| Extended Temperature Stability | 250 pA max IB over −55°C to +125°C - enables use in military-grade sample-and-hold circuits |
| Null Compatibility | Pinout identical to OP07 - allows direct socket replacement in existing PCBs without layout changes |
| Guard Ring Support | Input pins isolated by dedicated guard trace routing - required to maintain ≤100 pA leakage in humid environments |
Applications
| High-Resolution DAC Output Amplifier | Precision Current Monitor |
|---|---|
|
Use Scenario: Amplifying output of 16-bit CMOS DAC (e.g., AD7548) in portable medical sensor front-ends. IC Role / Device Role / Timing Role: Output buffer and offset correction stage ensuring monotonicity and linearity over temperature. Use Value: 25 μV max VOS prevents degradation of DAC INL/DNL; 100 pA IB avoids resistor-divider loading errors. |
Use Scenario: Bidirectional current sensing in full-bridge motor drivers with ±15 V supplies and >100 V common-mode transients. IC Role / Device Role / Timing Role: High-CMRR difference amplifier rejecting supply noise while resolving µA-level load variations. Use Value: 114 dB CMRR ensures <0.0002% common-mode error contribution; rail-to-rail input range accommodates large VCM swings. |
| Long-Term Integrator | Programmable Gain Amplifier |
|
Use Scenario: Charge integration in radiation dosimetry systems requiring stable gain over months of continuous operation. IC Role / Device Role / Timing Role: Integrator core with ultra-low input bias current minimizing drift-induced integration error. Use Value: 0.3 μV/month long-term VOS stability and 250 pA max IB at +125°C ensure <0.1% gain drift/year. |
Use Scenario: Digitally controlled gain stage in automated test equipment supporting 12-bit resolution from −1× to −4096×. IC Role / Device Role / Timing Role: Precision inverting amplifier with programmable feedback network and low-noise front-end. Use Value: 17 nV/√Hz input noise and 0.6 μV/°C TCVOS maintain 10-bit linearity across full gain range and temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP07CP | Higher supply current (2.5 mA), larger offset drift (1.3 μV/°C), same 8-pin PDIP footprint | Not suitable for battery-powered designs; requires nulling circuitry in high-accuracy applications | Select OP07CP only when legacy design validation mandates exact OP07 behavior and power budget permits |
| AD8628ARZ | Zero-drift architecture, 1 μV max VOS, but higher supply current (1.1 mA) and limited supply range (±2.7 V to ±5.5 V) | Superior DC specs but incompatible with ±15 V industrial systems; requires redesign of supply and level-shifting | Choose AD8628ARZ only for low-voltage, ultra-low-drift applications where ±15 V operation is unnecessary |
Compared with OP07CP and AD8628ARZ, OP97FP uniquely balances ultra-low power (600 μA), wide supply range (±2.25 V to ±20 V), and proven industrial temperature stability - making it the only drop-in replacement for OP07 sockets in extended-range, energy-constrained precision analog systems.
Availability
OP97FP is available at Aetrix Electronics and suitable for precision instrumentation, portable medical devices, and industrial process control systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OP97FP 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 OP97FP belongs to Analog Devices' precision operational amplifier product line, engineered specifically for applications demanding low power, low drift, and high DC accuracy in harsh thermal environments - including portable test equipment and long-duration monitoring systems.
FAQ
Is OP97FP pin-compatible with OP07-based PCBs?
Yes, OP97FP uses the identical 8-lead PDIP pinout as the OP07, including Pin 1 and Pin 8 for offset nulling. No PCB modifications are required for direct socket replacement, and the internal trimming eliminates need for external nulling in most applications. The OP97FP maintains full functional compatibility while reducing supply current by over 75% compared to OP07.
What is the maximum allowable differential input voltage for OP97FP?
The absolute maximum differential input voltage for OP97FP is ±1 V. Exceeding this value risks excessive current flow through the internal back-to-back protection diodes. If higher differential voltages are expected, external series resistors must be added to limit input current to ≤10 mA, as specified in the Absolute Maximum Ratings table on Page 5 of the OP97FP datasheet.
Can OP97FP drive capacitive loads without instability?
Yes, OP97FP includes an overcompensation pin (Pin 5) that allows stable operation with capacitive loads up to 10,000 pF when a capacitor is connected between Pin 5 and ground. Without overcompensation, the device remains stable with ≥100 pF loads. This capability makes OP97FP suitable for driving ADC input filters, coaxial cables, and piezoelectric sensor interfaces without external isolation resistors.
Does OP97FP require external offset nulling in precision applications?
No, OP97FP does not require external offset nulling in the majority of precision applications due to its factory-trimmed 25 μV maximum input offset voltage and 0.6 μV/°C maximum drift. External nulling (via Pin 1/Pin 8 potentiometer) is only necessary in systems demanding sub-10 μV offset or operating beyond the −40°C to +85°C temperature range where drift accumulates.
What layout practices are essential to achieve specified 100 pA input bias current?
To achieve the rated 100 pA input bias current, OP97FP requires strict PCB layout discipline: implement guard rings around Pins 2 and 3 tied to common-mode voltage, use conformal coating to prevent moisture-induced surface leakage, clean flux residues thoroughly, and avoid routing high-impedance traces near noisy digital lines. These measures prevent parasitic leakage paths that would otherwise dominate the input current specification.
OP97FP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- 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:
- 0.2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 900 kHz
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 380µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OP97FP FAQ
1.How can I place an order for OP97FP through Aetrix?
Please submit a Request for Quotation (RFQ) for OP97FP 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 OP97FP reliable?
The price and inventory of OP97FP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP97FP is usually 5 days.
3.What payment methods are accepted for OP97FP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP97FP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP97FP?
OP97FP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP97FP 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 OP97FP?
For technical support, including OP97FP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP97FP requirements.
6.How does Aetrix verify that OP97FP is sourced from the original manufacturer or authorized distributors?
All OP97FP 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 OP97FP meets industry standards.
7.What is the process for return or replacement of OP97FP?
All OP97FP units undergo pre-shipment inspection (PSI). If there is an issue with OP97FP, 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 OP97FP part is unused and in its original packaging.
Return procedure for OP97FP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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