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Analog Devices Inc./Maxim Integrated MAX480CPA
- Part No.:
- MAX480CPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX480CPA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,117
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Product details
Overview
MAX480CPA from Maxim Integrated is a high-precision, micropower operational amplifier designed for ultra-low-power analog signal conditioning in battery-constrained systems. It delivers 140µV max input offset voltage, 20µA max supply current, and rail-to-rail input/output swing down to the negative supply rail - enabling true single-supply operation from +1.6V to +36V or dual supplies from ±0.8V to ±18V. It is used in precision sensor front-ends and coin-cell-powered instrumentation.
For engineers reviewing the MAX480CPA datasheet, MAX480CPA pinout, MAX480CPA application, or MAX480CPA equivalent, key selection criteria include guaranteed micropower consumption (<20µA), sub-150µV offset voltage over temperature, standard 741-compatible pinout with V− nulling, and compatibility with low-voltage single-supply architectures requiring ground-referenced inputs and outputs.
Technical Context
The MAX480CPA employs a precision bipolar input stage optimized for low offset and drift, achieving 2.0µV/°C max TCVOS and 3nA max input bias current. Its architecture supports stable operation with capacitive loads up to 650pF and maintains ≥500V/mV open-loop gain across its full supply range.
It features rail-to-rail input common-mode range (including V−) and output swing within 100mV of rails under 10kΩ load, enabling full dynamic range utilization in +5V single-supply configurations. The device is specified for 0°C to +70°C operation and uses a standard 8-pin DIP package with pin 1–8 mapping matching legacy 741 op amps plus dedicated null terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +36V single or ±0.8V to ±18V dual - enables direct use in 3.3V, 5V, and industrial 24V systems without level-shifting. |
| Input Offset Voltage | 140µV max (25µV typ) - ensures <0.1% error in mV-level sensor amplification without trimming. |
| Supply Current | 20µA max - supports >10,000 hours runtime on a 250mAh lithium coin cell. |
| Output Drive | ±5mA min - drives 2kΩ loads while maintaining rail-to-rail swing in single-supply mode. |
| Input Offset Drift | 2.0µV/°C max - limits thermal drift to <140µV over 70°C ambient range. |
| Open-Loop Gain | 500V/mV min - provides ≥114dB loop gain for stable closed-loop gain accuracy at unity and higher gains. |
| CMRR / PSRR | 85dB min CMRR, 85dB min PSRR - rejects power supply noise and common-mode interference in noisy industrial environments. |
Pinout & Package
MAX480CPA is housed in an 8-pin plastic DIP package (0.300" wide), compatible with through-hole prototyping and legacy PCB footprints. Pinout follows industry-standard 741 configuration with added nulling capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null (Offset Adjust) | Connects to V− for zero-adjust potentiometer; enables manual offset trimming to <10µV. |
| 2 | Inverting Input (IN−) | Differential input node; accepts signals down to V− rail for true single-supply operation. |
| 3 | Noninverting Input (IN+) | Differential input node; common-mode range includes V−, supporting ground-referenced sensors. |
| 4 | V− (Negative Supply) | Primary negative rail connection; also serves as reference for pin 1 nulling circuit. |
| 5 | Null (Offset Adjust) | Second null terminal; completes adjustable offset compensation network with pin 1. |
| 6 | Output (OUT) | Amplified output; swings within 100mV of V− and V+ rails under 10kΩ load. |
| 7 | V+ (Positive Supply) | Primary positive rail connection; supports up to +36V for wide-input-range applications. |
| 8 | N.C. | No internal connection; left unconnected per datasheet - not used for function or thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Input and output ranges include V− rail - eliminates need for split supplies in portable sensor interfaces. |
| Ultra-low quiescent current | 20µA max - reduces system standby power by >90% vs. standard precision op amps. |
| Low offset voltage drift | 2.0µV/°C max - ensures stable calibration over temperature without active compensation. |
| Standard 741 pinout with nulling | Pins 1 & 5 support external offset trim - maintains backward compatibility with legacy designs. |
| Rail-to-rail input/output | Operates with inputs at V− and outputs within 100mV of V−/V+ - maximizes dynamic range in low-voltage systems. |
Applications
| Portable Medical Sensors | Remote Environmental Monitors |
|---|---|
Use Scenario: Amplifying microvolt-level thermistor or pH electrode signals in handheld diagnostic devices powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Precision DC-coupled signal conditioner providing gain, offset correction, and rail-to-rail buffering before ADC sampling. Use Value: 20µA supply current extends battery life beyond 1 year; 140µV offset ensures <0.5°C error in temperature measurement without calibration. |
Use Scenario: Signal conditioning for low-power gas sensors (e.g., CO, NO₂) deployed in solar-powered field nodes with 10-year deployment targets. IC Role / Device Role / Timing Role: Micropower transimpedance amplifier converting nanoamp-level sensor currents into stable voltage outputs. Use Value: 3nA max input bias current prevents sensor loading errors; rail-to-rail input allows direct connection to grounded electrochemical cells. |
| Industrial Process Transmitters | Low-Power Data Acquisition Modules |
Use Scenario: 4–20mA loop-powered transmitter front-end where headroom is constrained by 12–24V supply and 250Ω burden resistor. IC Role / Device Role / Timing Role: Precision buffer and level shifter translating sensor outputs to loop driver input while rejecting supply ripple. Use Value: 85dB PSRR suppresses 120Hz supply noise; ±5mA output drive sustains 20mA loop compliance with minimal headroom loss. |
Use Scenario: Multi-channel analog input module for edge controllers using 3.3V logic and isolated 5V analog rails. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier preceding SAR ADCs in battery-backed data loggers. Use Value: 2.0µV/°C drift minimizes recalibration frequency; 500V/mV gain ensures 16-bit ADC utilization with <1 LSB error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1492CN8#PBF | Higher supply current (65µA), lower offset (30µV max), SO-8 only - no DIP option. | Requires PCB redesign for SO-8 footprint; better for new designs needing lower offset but higher power budget. | Select when offset <50µV is mandatory and DIP is not required; avoid if coin-cell lifetime >5 years is critical. |
| OPA333AIDR | Zero-drift architecture (0.02µV/°C), 17µA supply current, rail-to-rail I/O - but only available in SO-8 and SOT-23. | Superior drift performance enables uncalibrated operation over wide temperature ranges; incompatible with through-hole layouts. | Choose for ultra-stable DC measurements where layout flexibility allows surface-mount; not drop-in for MAX480CPA DIP sockets. |
Compared with LT1492CN8#PBF and OPA333AIDR, the MAX480CPA uniquely combines DIP packaging, 741 pinout compatibility, and sub-20µA operation - making it irreplaceable in legacy repair, educational labs, and through-hole prototypes where board rework is prohibited.
Availability
MAX480CPA is available at Aetrix Electronics and suitable for precision micropower amplifiers, battery-powered analog circuits, and industrial process transmitters requiring stable component supply and long-term obsolescence management.
Supply support for MAX480CPA 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX480CPA belongs to Maxim's precision op amp product line, engineered specifically for ultra-low-power, high-accuracy signal conditioning in space- and energy-constrained systems where longevity and stability outweigh raw speed requirements.
FAQ
What is the operating temperature range for the MAX480CPA?
The MAX480CPA is rated for commercial temperature operation from 0°C to +70°C. This range is explicitly defined in the ordering information table and electrical characteristics sections of the datasheet. The 'C' suffix in MAX480CPA denotes this commercial grade specification, distinguishing it from extended (E) and military (M) variants. All guaranteed parameters - including 140µV max offset voltage and 20µA max supply current - apply across this full 0°C to +70°C interval.
Does the MAX480CPA support true single-supply operation with ground-referenced inputs?
Yes, the MAX480CPA supports true single-supply operation with inputs extending to the negative supply rail (V−). When V− is connected to ground, both IN+ and IN− accept signals from 0V upward - a key feature confirmed in the General Description and Electrical Characteristics tables. This rail-to-rail input capability eliminates the need for level-shifting networks in battery-powered sensor interfaces where the signal source is ground-referenced.
Can the MAX480CPA drive a 2kΩ load while maintaining rail-to-rail output swing?
Yes, the MAX480CPA guarantees ±5mA minimum output current, enabling it to sustain rail-to-rail output swing into a 2kΩ load. The datasheet specifies VOL = 0V and VOH = +5V (with V+ = +5V, V− = 0V) under RL = 2kΩ conditions - confirming full swing capability at that load. This is verified in the "Output Voltage Swing" section of the Electrical Characteristics table and supported by Figure MAX480-08.
Is the MAX480CPA pin-compatible with standard 741 op amps?
The MAX480CPA uses the standard 741 pinout (pins 2/3/4/6/7 for IN−/IN+/V−/OUT/V+) with additional nulling terminals at pins 1 and 5 - making it functionally compatible but not electrically identical to the 741. Unlike the 741, the MAX480CPA has rail-to-rail input/output and micropower operation. Pin-for-pin replacement is possible in existing 741 footprints, but external nulling components must be retained or adjusted per the MAX480's lower offset requirements.
Why is the MAX480CPA marked 'Not Recommended for New Designs'?
The MAX480CPA is marked 'Not Recommended for New Designs' because its fabrication process at an external wafer foundry has been discontinued, as stated in the datasheet's opening notice. While fully functional and supported for legacy systems, Maxim does not guarantee long-term wafer availability. Aetrix Electronics maintains inventory for repair, maintenance, and continuity programs - but new designs should evaluate alternatives like the OPA333AIDR or LT1492CN8#PBF based on application-specific trade-offs.
MAX480CPA 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:
- 1 nA
- Voltage - Input Offset:
- 25 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX480CPA FAQ
1.How can I place an order for MAX480CPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX480CPA 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 MAX480CPA reliable?
The price and inventory of MAX480CPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX480CPA is usually 5 days.
3.What payment methods are accepted for MAX480CPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX480CPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX480CPA?
MAX480CPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX480CPA 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 MAX480CPA?
For technical support, including MAX480CPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX480CPA requirements.
6.How does Aetrix verify that MAX480CPA is sourced from the original manufacturer or authorized distributors?
All MAX480CPA 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 MAX480CPA meets industry standards.
7.What is the process for return or replacement of MAX480CPA?
All MAX480CPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX480CPA, 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 MAX480CPA part is unused and in its original packaging.
Return procedure for MAX480CPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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