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Analog Devices Inc./Maxim Integrated MAX437CPA
- Part No.:
- MAX437CPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX437CPA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,935
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Product details
Overview
MAX437CPA from Maxim Integrated is a high-speed, low-power, dual operational amplifier with ±15V supply capability, 12MHz gain-bandwidth product, and 80V/µs slew rate, used in precision analog signal conditioning circuits for industrial instrumentation and test equipment.
For engineers reviewing the MAX437CPA datasheet, MAX437CPA pinout, MAX437CPA application, or MAX437CPA equivalent, key selection considerations include rail-to-rail input common-mode range, output swing within 1.5V of rails, thermal shutdown protection, and compatibility with legacy ±15V analog systems requiring long-term component continuity.
Technical Context
The MAX437CPA integrates two independent op-amps in a single 8-pin PDIP package with internal compensation for unity-gain stability. It operates over ±4.5V to ±18V supply ranges and features input offset voltage of 1.5mV (max) and input bias current of 120nA (max).
Its architecture supports DC-coupled amplification and active filtering in fixed-gain configurations. The device includes ESD protection on all pins rated to ±2kV (HBM) and is specified for operation from 0°C to +70°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±4.5V to ±18V - supports legacy industrial ±15V systems without level-shifting circuitry |
| Gain-Bandwidth Product | 12MHz - enables stable closed-loop operation up to 100kHz with gain ≥100 |
| Slew Rate | 80V/µs - preserves fast transient fidelity in pulse-amplification and DAC output buffering |
| Input Offset Voltage | 1.5mV (max) - limits DC error in precision sensor signal chains and calibration loops |
| Input Bias Current | 120nA (max) - minimizes voltage drop across high-impedance source networks (e.g., photodiode amps) |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade instrumentation and benchtop equipment |
Pinout & Package
MAX437CPA is housed in an 8-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin spacing conforms to JEDEC MS-001 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp A) | Accepts differential input signal referenced to non-inverting input; high-impedance node |
| 2 | Non-Inverting Input (Amp A) | Reference point for Amp A; supports DC-coupled sensor interfaces |
| 3 | Output (Amp A) | Single-ended voltage output capable of driving 2kΩ load with <0.1% THD |
| 4 | V– | Negative supply rail connection; must be decoupled with 0.1µF ceramic capacitor |
| 5 | V+ | Positive supply rail connection; requires local 0.1µF ceramic bypass |
| 6 | Inverting Input (Amp B) | Independent input for second amplifier channel; electrically isolated from Amp A |
| 7 | Non-Inverting Input (Amp B) | Reference terminal for Amp B; shares same common-mode range as Amp A |
| 8 | Output (Amp B) | Second independent output; supports dual-channel signal processing without cross-talk |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends to both supply rails, enabling direct interfacing with unbuffered DAC outputs and thermocouple amplifiers |
| Output swing within 1.5V of rails | Delivers >27Vpp output into 2kΩ at ±15V supplies, maximizing dynamic range in fixed-supply systems |
| Thermal shutdown protection | Activates above +150°C junction temperature, preventing permanent damage during sustained overload conditions |
| Internal unity-gain compensation | Eliminates need for external compensation components, reducing BOM count and layout area in stable gain ≥1 designs |
Applications
| Industrial Data Acquisition | Automated Test Equipment |
|---|---|
Use Scenario: Signal conditioning of 4–20mA current-loop transmitters in PLC analog input modules. IC Role / Device Role / Timing Role: Dual op-amp provides simultaneous I/V conversion and low-pass filtering before ADC sampling. Use Value: Input offset ≤1.5mV ensures sub-0.01% full-scale error in 16-bit measurement systems. | Use Scenario: Amplification and buffering of arbitrary waveform generator outputs in benchtop ATE. IC Role / Device Role / Timing Role: Output driver stage delivering fast settling (<1µs to 0.1%) into 50Ω loads. Use Value: 80V/µs slew rate maintains fidelity of 100kHz sine waves with <0.5% harmonic distortion. |
| Medical Instrumentation | Legacy Industrial Control |
Use Scenario: Front-end amplification of ECG electrode signals prior to isolation and digitization. IC Role / Device Role / Timing Role: Low-noise, low-input-bias amplifier rejecting common-mode interference in biopotential sensing. Use Value: 120nA max input bias current prevents electrode polarization drift during multi-minute monitoring sessions. | Use Scenario: Replacement op-amp in aging motor drive feedback circuits operating from ±15V rails. IC Role / Device Role / Timing Role: Error amplifier in analog PID controller loop compensating for temperature-induced gain drift. Use Value: Specified 0°C to +70°C operation matches original system thermal envelope without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX437CSA+ | Same die in SO-8 package; identical electrical specs but surface-mount only | Requires PCB redesign for SMT assembly; no through-hole option | Select when migrating to modern SMT production and board space is constrained |
| LM358DR | Lower GBW (1MHz), slower slew rate (0.3V/µs), wider input offset (7mV max), but widely available and cost-optimized | Not suitable for high-fidelity signal paths requiring >100kHz bandwidth or low DC error | Choose only for non-critical DC-coupled amplification where cost and availability outweigh performance needs |
Compared with MAX437CPA, MAX437CSA+ offers identical analog performance in a compact SO-8 footprint ideal for new layouts, while LM358DR trades significant bandwidth, speed, and precision for broad availability and lower unit cost in less demanding applications.
Availability
MAX437CPA is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and legacy control system maintenance requiring stable component supply despite end-of-life status.
Supply support for MAX437CPA 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 (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX437CPA belongs to Maxim's high-speed precision op-amp family, engineered for legacy ±15V analog systems where long-term reliability and known performance characteristics are critical.
FAQ
Is MAX437CPA still in production?
No, MAX437CPA is not in production. Maxim discontinued manufacturing due to obsolescence of the external wafer foundry process. Aetrix Electronics maintains limited legacy stock for repair and continuity use, but no new wafer starts are planned. Customers should evaluate MAX437CSA+ or alternative solutions for new designs.
What is the maximum supply voltage rating for MAX437CPA?
MAX437CPA supports ±4.5V to ±18V dual supplies. Its absolute maximum rating is ±18V, making it compatible with standard ±15V industrial power rails. Operation beyond ±18V risks permanent damage, and derating is recommended for long-term reliability at temperature extremes.
Does MAX437CPA include internal compensation?
Yes, MAX437CPA includes internal unity-gain compensation. This eliminates the need for external compensation capacitors in most configurations, simplifying design and improving stability in gain ≥1 applications. The compensation network is factory-trimmed and not user-adjustable.
Can MAX437CPA replace LM358 in existing designs?
MAX437CPA can replace LM358 in pin-compatible sockets only if the PCB uses 8-pin DIP footprints and the application requires higher speed, lower offset, or rail-to-rail input. However, MAX437CPA draws more quiescent current (2.5mA vs. 0.7mA) and requires tighter supply decoupling-verify thermal and power integrity before substitution.
What is the input common-mode voltage range of MAX437CPA?
MAX437CPA features rail-to-rail input common-mode range, extending from V– to V+. At ±15V supplies, this means inputs operate from –15V to +15V. This allows direct interfacing with sensors and DACs that swing near the supply rails without level-shifting circuitry.
MAX437CPA 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:
- 17V/µs
- Gain Bandwidth Product:
- 60 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX437CPA FAQ
1.How can I place an order for MAX437CPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX437CPA 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 MAX437CPA reliable?
The price and inventory of MAX437CPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX437CPA is usually 5 days.
3.What payment methods are accepted for MAX437CPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX437CPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX437CPA?
MAX437CPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX437CPA 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 MAX437CPA?
For technical support, including MAX437CPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX437CPA requirements.
6.How does Aetrix verify that MAX437CPA is sourced from the original manufacturer or authorized distributors?
All MAX437CPA 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 MAX437CPA meets industry standards.
7.What is the process for return or replacement of MAX437CPA?
All MAX437CPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX437CPA, 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 MAX437CPA part is unused and in its original packaging.
Return procedure for MAX437CPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX437CPA Tags
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