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Analog Devices Inc./Maxim Integrated MAX479CPD
- Part No.:
- MAX479CPD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX479CPD.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,666
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Product details
Overview
MAX479CPD from Maxim Integrated is a quad, single-supply, precision operational amplifier in 14-pin plastic DIP package, delivering 17 µA max supply current per amplifier, 70 µV max input offset voltage (at +25°C), and rail-to-rail output swing to within 9 mV of ground under no-load conditions. It targets ultra-low-power signal conditioning in battery-powered instrumentation and remote sensor interfaces.
For engineers reviewing the MAX479CPD datasheet, MAX479CPD pinout, MAX479CPD application, or MAX479CPD equivalent, key selection criteria include guaranteed 5V/3V single-supply operation, input common-mode range extending to ground, 250 pA max input offset current, and 0.5 µV/°C typical offset drift - critical for stable DC-coupled amplification in energy-constrained systems.
Technical Context
The MAX479CPD integrates four independent precision op amps on a single die, each optimized for micro-power operation with bipolar input stages enabling low input bias current (3–6 nA) and high input resistance (≥0.6 GΩ differential). Its architecture supports true single-supply functionality: inputs operate down to V– (ground), and outputs sink current to within millivolts of ground without pull-down resistors.
It is characterized across ±15V, +5V/0V, and +3V/0V supplies, with guaranteed performance at 0°C to +70°C. The device exhibits 60 kHz gain-bandwidth product at 5V, 0.013 V/µs slew rate, and >90 dB CMRR/PSRR - enabling accurate low-frequency amplification in noisy industrial or portable environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 14–21 µA at +25°C, 5V supply - enables multi-channel amplification in sub-100 µA system budgets |
| Input Offset Voltage | 60–200 µV (max at +70°C) - ensures <1 mV error in 10× gain stages without trimming |
| Input Offset Drift | 0.6–3.0 µV/°C - maintains calibration stability over temperature in unheated enclosures |
| Output Swing (Low) | 9 mV above ground (no load) - eliminates need for negative rail or level-shifting in single-supply data acquisition |
| Common-Mode Rejection | 90–101 dB (0°C to +70°C) - rejects power supply ripple and shared-noise coupling in sensor front-ends |
| Gain-Bandwidth Product | 60 kHz at 5V - sufficient for anti-aliasing, thermocouple amplification, and micropower filter stages |
| Input Bias Current | 3–7 nA - preserves high-impedance source integrity (e.g., pH electrodes, piezoresistive sensors) |
Pinout & Package
MAX479CPD is housed in a 14-pin plastic DIP (PDIP) package, 0.300" wide, with standard through-hole mounting and JEDEC MS-001AC outline. Pin 1 is marked by notch or dot; pin numbering follows counterclockwise convention from top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTD | Amplifier D output - drives low-impedance loads up to 5 mA sink/source |
| 2 | IND– | Inverting input of Amp D - accepts differential or single-ended feedback configurations |
| 3 | IND+ | Non-inverting input of Amp D - referenced to ground or bias network for DC-coupled sensing |
| 4 | V– | Negative supply terminal - tied to ground in single-supply mode; enables true zero-input operation |
| 5 | V+ | Positive supply terminal - operates from 2.2 V to ±22 V; 5 V nominal for optimal precision |
| 6 | INA+ | Non-inverting input of Amp A - high-impedance node (≥12 GΩ common-mode) for sensor interfacing |
| 7 | INA– | Inverting input of Amp A - used with external resistors for programmable gain or filtering |
| 8 | OUTA | Amplifier A output - rail-to-rail swing supports direct ADC driving without level shift |
| 9 | INC+ | Non-inverting input of Amp C - isolated from other channels for independent signal paths |
| 10 | INC– | Inverting input of Amp C - supports transimpedance or difference-amplifier topologies |
| 11 | OUTC | Amplifier C output - electrically isolated from OUTA/B/D to minimize crosstalk (<130 dB at 1 kHz) |
| 12 | OUTB | Amplifier B output - shares V+ and V– rails but maintains channel separation per datasheet test |
| 13 | INB– | Inverting input of Amp B - compatible with resistor networks up to 10 MΩ without significant error |
| 14 | INB+ | Non-inverting input of Amp B - referenced to same ground as V–, enabling true single-supply biasing |
Key Features
| Feature | Design Value |
|---|---|
| Quad precision op amp | Four matched amplifiers in one 14-pin DIP - reduces board space and component count vs. discrete duals |
| 17 µA max supply current per amp | Enables >100-hour operation on coin-cell batteries in always-on sensor nodes |
| Input voltage range includes ground | Accepts 0 V input signals without clamping or level-shifting circuitry |
| Output swings to ground while sinking current | Drives logic inputs, ADC references, or low-side switches directly from single supply |
| 250 pA max input offset current | Minimizes voltage error across high-value feedback resistors (>1 MΩ) in precision integrators |
| 70 µV max offset voltage (A-grade) | Supports 16-bit resolution in 10× gain stages without factory calibration |
Applications
| Battery-Powered Sensor Amplifier | Thermocouple Signal Conditioning |
|---|---|
Use Scenario: Amplifying mV-level outputs from RTDs or thermistors in handheld environmental monitors powered by two AA cells. IC Role / Device Role / Timing Role: Quad op amp configured as three instrumentation amps (for differential sensing) and one reference buffer. Use Value: 17 µA per amplifier enables full-sensor-chain operation below 100 µA total, extending battery life beyond 1 year. |
Use Scenario: Cold-junction compensation and linearization of Type-K thermocouples in industrial data loggers. IC Role / Device Role / Timing Role: Precision amplifier with low offset drift (0.6 µV/°C) and rail-to-ground output for ADC interface. Use Value: 70 µV max VOS and 0.5 µV/°C typical drift ensure <0.5°C measurement error over 0–70°C ambient range. |
| Micropower Sample-and-Hold Circuit | Single Lithium Cell Powered System |
Use Scenario: Holding analog sensor values during microcontroller sleep cycles in wireless IoT endpoints. IC Role / Device Role / Timing Role: Unity-gain buffer with low input bias current (3 nA) and high input impedance to minimize hold capacitor leakage. Use Value: 250 pA max IOS prevents >1 LSB error in 16-bit, 1 µF hold circuits over 100 ms sampling intervals. |
Use Scenario: Signal conditioning for gas sensors in portable safety equipment powered by 3.6 V Li-ion cells. IC Role / Device Role / Timing Role: Quad amplifier supporting sensor excitation, signal gain, reference buffering, and fault detection. Use Value: Guaranteed operation down to 2.2 V supply allows full functionality until battery reaches end-of-discharge (~3.0 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4478ASA+ | Lower 1.1 µV/°C drift, 1.8 V min supply, but 125 µA supply current per amp | Higher power consumption limits use in multi-year battery applications | Select when higher bandwidth (10 MHz) and lower drift outweigh micropower needs |
| OPA2333P | Zero-drift architecture, 0.02 µV/°C drift, but 17 µA per amp and 360 kHz GBW | Superior DC accuracy but lower bandwidth restricts AC-coupled filter use | Select when long-term calibration stability is critical and signal bandwidth <100 kHz |
Compared with MAX479CPD, MAX4478ASA+ trades 7× higher supply current for 2× better drift and wider supply range, while OPA2333P offers near-zero drift at identical quiescent current but sacrifices bandwidth and single-supply output swing capability.
Availability
MAX479CPD is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor amplifiers, and micropower sample-and-hold circuits requiring stable component supply and legacy design continuity.
Supply support for MAX479CPD 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 MAX478/MAX479 family was engineered specifically for ultra-low-power, single-supply precision amplification in portable and remote measurement systems where supply current and DC accuracy are primary constraints.
FAQ
Is MAX479CPD still in production?
No - MAX479CPD is Not Recommended for New Designs due to discontinuation of its wafer fabrication process. Aetrix Electronics maintains limited legacy stock for existing designs and can assist in identifying qualified replacements. Full datasheet documentation remains accessible for design validation and repair support.
What is the maximum operating supply voltage for MAX479CPD?
The absolute maximum supply voltage for MAX479CPD is ±22 V, with guaranteed operation from ±15 V, +5 V/0 V, and +3 V/0 V. At 5 V single supply, it delivers full specified performance including input range to ground and rail-to-ground output swing - critical for compatibility with modern low-voltage ADCs.
Can MAX479CPD drive a 10 kΩ load to rail in single-supply mode?
Yes - MAX479CPD sources and sinks ≥5 mA per amplifier, enabling full rail-to-rail output swing into 10 kΩ loads at 5 V supply. Output voltage swing is specified as 4.1–4.3 V (high) and 8–11 mV (low) under no-load conditions, degrading only marginally to 3.3–3.8 V high and 0.2–0.6 V low at 2 kΩ - well within 10 kΩ capability.
Does MAX479CPD require external compensation for unity-gain stability?
No - MAX479CPD is internally compensated for unity-gain stability across all supply voltages and temperatures. Typical gain-bandwidth product is 60 kHz at 5 V, and phase margin exceeds 60° per datasheet transient response curves, allowing direct use in voltage-follower and active-filter configurations without added components.
How does input offset voltage vary across temperature for MAX479CPD?
For MAX479CPD (commercial grade, 0°C to +70°C), input offset voltage drift is specified as 0.6–3.0 µV/°C. At +25°C, VOS is typically 35–100 µV; at +70°C, max VOS rises to 200 µV. This drift behavior is fully characterized and guaranteed - enabling predictable error budgeting in unregulated-temperature deployments.
MAX479CPD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 85 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 nA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 13µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
MAX479CPD FAQ
1.How can I place an order for MAX479CPD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX479CPD 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 MAX479CPD reliable?
The price and inventory of MAX479CPD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX479CPD is usually 5 days.
3.What payment methods are accepted for MAX479CPD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX479CPD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX479CPD?
MAX479CPD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX479CPD 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 MAX479CPD?
For technical support, including MAX479CPD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX479CPD requirements.
6.How does Aetrix verify that MAX479CPD is sourced from the original manufacturer or authorized distributors?
All MAX479CPD 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 MAX479CPD meets industry standards.
7.What is the process for return or replacement of MAX479CPD?
All MAX479CPD units undergo pre-shipment inspection (PSI). If there is an issue with MAX479CPD, 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 MAX479CPD part is unused and in its original packaging.
Return procedure for MAX479CPD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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