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Analog Devices Inc./Maxim Integrated MAX480CSA
- Part No.:
- MAX480CSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX480CSA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,195
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Product details
Overview
MAX480CSA from Maxim Integrated is a high-precision, micropower operational amplifier optimized for battery-powered analog circuits and precision signal conditioning. It delivers 140µV max input offset voltage, 20µA max supply current, and rail-to-rail input/output operation down to +1.6V single supply. Its standard 741 pinout with nulling to V− supports legacy design integration in low-power sensor front-ends and portable instrumentation.
For engineers reviewing the MAX480CSA datasheet, MAX480CSA pinout, MAX480CSA application, or MAX480CSA equivalent, key selection criteria include guaranteed micropower consumption (<20µA), true single-supply capability (input/output includes ground), and ultra-low offset drift (2.0µV/°C max) in commercial-temperature SOIC packages.
Technical Context
The MAX480CSA implements a precision bipolar input stage with matched transistor pairs to achieve its 25µV typical and 140µV maximum input offset voltage across 0°C to +70°C. Its input bias current remains ≤3nA and offset current ≤4nA, enabling high-impedance source interfacing without significant error.
It operates from ±0.8V to ±18V dual supplies or +1.6V to +36V single supply, with output swing to within 100mV of rails into 10kΩ load. The amplifier maintains ≥500V/mV open-loop gain and ≥85dB CMRR at DC, supporting stable closed-loop configurations up to 10kHz bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 140µV max - ensures <0.1% gain error in 1V full-scale 10-bit systems |
| Supply Current | 20µA max - enables >10,000 hours runtime on 250mAh coin cell |
| Input Offset Drift | 2.0µV/°C max - limits thermal drift to <140µV over 70°C ambient range |
| Output Drive | ±5mA min - supports direct driving of 1kΩ loads without external buffers |
| Common-Mode Range | Includes V− rail - allows ground-referenced input in single-supply 1.6V–5V systems |
| Open-Loop Gain | 500V/mV min - provides ≥60dB loop gain at unity gain, ensuring <0.01% closed-loop error |
| PSRR | 1.0µV/V max - rejects >120dB of supply ripple at DC, critical for noisy battery systems |
Pinout & Package
MAX480CSA is housed in an 8-pin SO (SOIC-N) package per JEDEC MS-012, 150mil width, with 1.27mm pitch. Thermal resistance θJA = 170°C/W; derating 5.88mW/°C above +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null (Offset Adjust) | Connects to V− for zero-adjust; enables trimming of residual offset in precision DC paths |
| 2 | Inverting Input (IN−) | Differential input node; high-impedance (≥30MΩ) bipolar input for low-noise feedback networks |
| 3 | Noninverting Input (IN+) | Differential input node; common-mode range extends to V−, enabling ground-sensing |
| 4 | V− (Negative Supply) | Power rail reference; input/output stages operate down to this rail, enabling true single-supply use |
| 5 | Null (Offset Adjust) | Second null terminal; used with Pin 1 to apply external trim voltage across V− and V+ |
| 6 | Output (OUT) | Class-A output stage; sources/sinks ±5mA while maintaining rail-to-rail swing into 10kΩ |
| 7 | V+ (Positive Supply) | Power rail; supports single supply as low as +1.6V or dual ±0.8V |
| 8 | No Connect (N.C.) | Internally unused; must be left floating or tied to V− per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 1.6V–5V single-supply data acquisition without level-shifting |
| 20µA quiescent current | Reduces battery load by >5× vs. industry-standard precision op amps, extending shelf life |
| Standard 741 pinout | Permits drop-in replacement in legacy designs using 741-based instrumentation without PCB rework |
| 140µV max offset voltage | Eliminates need for auto-zero circuitry in 12-bit systems where 1LSB = 122µV at 5V full scale |
| 2.0µV/°C max drift | Ensures offset stays within 100µV over industrial temperature cycling, avoiding recalibration |
Applications
| Portable ECG Front-End | Wireless Sensor Node Signal Chain |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in battery-powered wearable ECG monitors. IC Role / Device Role / Timing Role: Primary instrumentation amplifier input stage, providing DC-coupled gain with minimal power and offset-induced baseline drift. Use Value: 20µA supply current extends 200mAh coin cell life beyond 1 year; 140µV offset avoids >1mm ST-segment distortion at 1000× gain. | Use Scenario: Conditioning thermistor, RTD, or bridge sensor outputs in LoRaWAN-enabled environmental sensors. IC Role / Device Role / Timing Role: Precision buffer and gain stage before 12-bit SAR ADC, operating from single 3.3V supply. Use Value: Rail-to-rail I/O captures full 0–3.3V sensor range; 2.0µV/°C drift prevents calibration drift across −20°C to +70°C field deployment. |
| Low-Power Data Logger | Industrial Process Monitor |
Use Scenario: Battery-backed analog input module sampling pressure, humidity, and voltage in remote infrastructure monitoring. IC Role / Device Role / Timing Role: Micropower signal conditioner preceding multiplexed ADC, activated only during measurement bursts. Use Value: Sub-20µA quiescent draw minimizes standby loss; 3nA input bias avoids >10mV error across 10MΩ sensor impedance. | Use Scenario: Isolated 4–20mA transmitter front-end where loop power budget is constrained to <3.5mA. IC Role / Device Role / Timing Role: Low-offset, low-drift amplifier in voltage-to-current conversion path with 24V loop supply. Use Value: 140µV offset contributes <0.7% of full-scale error; ±5mA output drives 250Ω shunt and active circuitry simultaneously. |
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 |
|---|---|---|---|
| MAX44260ASA+ | 1.8V min supply, 1.2µV/°C drift, 650nA IB, 1.2MHz GBW - higher speed, lower drift, but 3× higher IQ (60µA) | Better for AC-coupled sensor interfaces >1kHz; less suitable for ultra-long-life coin-cell use | Select MAX44260ASA+ when bandwidth >100kHz or drift <1.2µV/°C is required; retain MAX480CSA for sub-20µA priority |
| OPA333AIDBVR | Zero-drift architecture, 0.1µV/°C drift, 17µA IQ, 36V max supply - superior drift performance, same supply range | Ideal for DC-critical applications like precision weigh scales; requires different nulling and layout due to chopper topology | Choose OPA333AIDBVR when long-term DC stability dominates; MAX480CSA remains preferred for simplicity and proven reliability in legacy designs |
Compared with MAX44260ASA+ and OPA333AIDBVR, the MAX480CSA offers the lowest guaranteed supply current (20µA max) and standard 741 pinout for seamless integration into existing layouts, while trading off chopper-level drift and wideband response for proven micropower robustness.
Availability
MAX480CSA is available at Aetrix Electronics and suitable for portable medical devices, wireless sensor nodes, and low-power data loggers requiring stable component supply amid end-of-life transitions.
Supply support for MAX480CSA 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) designed high-performance analog and mixed-signal ICs for precision, power efficiency, and reliability in demanding environments.
The MAX480 product line targets ultra-low-power, high-accuracy signal conditioning in battery-operated and space-constrained systems, emphasizing offset, drift, and supply current optimization over speed.
FAQ
Is MAX480CSA still in production or available for new designs?
No - MAX480CSA is Not Recommended for New Designs due to discontinuation of its wafer fabrication process. However, Aetrix Electronics maintains limited legacy stock and supports continuity sourcing for existing programs. For new designs, consult Maxim's technical support for approved replacements such as MAX44260ASA+ or OPA333AIDBVR.
What is the maximum operating temperature range for MAX480CSA?
The MAX480CSA is rated for 0°C to +70°C (commercial temperature range). This is confirmed in the Ordering Information table, where "CSA" suffix denotes the SO package with 0°C to +70°C operation. Extended-range variants (e.g., MAX480ESA) support −40°C to +85°C but are distinct orderable parts.
Does MAX480CSA support true single-supply operation with rail-to-rail inputs and outputs?
Yes - the MAX480CSA supports true single-supply operation from +1.6V to +36V. Its input common-mode range and output swing both include the negative supply rail (V−), allowing it to accept and deliver signals down to ground in single-supply configurations - a key feature explicitly stated in the General Description and Features list.
Can MAX480CSA drive a 2kΩ load while maintaining specified output swing?
Yes - the MAX480CSA guarantees ±5mA minimum output drive. At V+ = 5V and V− = 0V, it delivers ≥3.9V high-level and ≤0.1V low-level output into 2kΩ (per Electrical Characteristics table), confirming full rail-to-rail swing capability under that load condition without external buffering.
What is the purpose of Pins 1 and 5 on MAX480CSA?
Pins 1 and 5 on the MAX480CSA are dedicated offset null terminals. They connect to opposite ends of an external potentiometer (typically 100kΩ) whose wiper goes to V−, enabling manual trimming of input offset voltage. This function is documented in Figure 1 (Offset Nulling Circuit) and the Pin Configuration diagram in the datasheet.
MAX480CSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX480CSA FAQ
1.How can I place an order for MAX480CSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX480CSA 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 MAX480CSA reliable?
The price and inventory of MAX480CSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX480CSA is usually 5 days.
3.What payment methods are accepted for MAX480CSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX480CSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX480CSA?
MAX480CSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX480CSA 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 MAX480CSA?
For technical support, including MAX480CSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX480CSA requirements.
6.How does Aetrix verify that MAX480CSA is sourced from the original manufacturer or authorized distributors?
All MAX480CSA 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 MAX480CSA meets industry standards.
7.What is the process for return or replacement of MAX480CSA?
All MAX480CSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX480CSA, 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 MAX480CSA part is unused and in its original packaging.
Return procedure for MAX480CSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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