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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 SNGL SUP QUAD 14-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:458
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Product details
Overview
MAX479CPD+ from Maxim Integrated is a quad, single-supply, precision operational amplifier optimized for micropower operation in battery- and solar-powered systems. It delivers 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 with 100 µA sink current - enabling high-accuracy signal conditioning in portable 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, 2.2 µV/°C max offset drift (0.5 µV/°C typ), 250 pA max input offset current, and compatibility with low-noise, high-input-impedance differential amplifier topologies requiring minimal quiescent power.
Technical Context
The MAX479CPD+ integrates four independent precision op amps on a single die, each featuring input voltage range extending to ground and output capable of sinking current down to near-ground without pull-down resistors. Its architecture supports stable operation at supply voltages as low as 2.2 V and up to ±22 V, with full specifications guaranteed at 5 V and 3 V single supplies.
It exhibits 60 kHz gain-bandwidth product (GBW) at 5 V, 0.013 V/µs slew rate, and >130 dB channel separation - making it suitable for multi-channel signal conditioning where crosstalk and power efficiency are critical. Input common-mode range spans from ground to 3.5 V (at 5 V supply), and PSRR exceeds 92 dB across 2.5–12 V supply variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 17 µA max - enables multi-year battery life in always-on sensor nodes. |
| Input Offset Voltage | 70 µV max (TA = +25°C) - ensures <10 µV error in 100× gain stages without trimming. |
| Offset Voltage Drift | 2.2 µV/°C max - limits thermal drift to <150 µV over –40°C to +85°C industrial range. |
| Input Offset Current | 250 pA max - preserves accuracy with high-impedance sources (>1 GΩ). |
| Output Swing (Low) | 9 mV above ground (no load, TA = +25°C) - eliminates need for external level-shifting circuitry. |
| Gain-Bandwidth Product | 60 kHz - supports DC-coupled amplification of slow-varying signals (e.g., thermocouples, strain gauges). |
| Common-Mode Rejection | 90 dB min - rejects noise from shared ground paths in multi-sensor PCB layouts. |
Pinout & Package
MAX479CPD+ is housed in a 14-pin plastic DIP package (0.300" wide), with lead finish Pb-free and RoHS-compliant per Maxim's legacy packaging standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A output | Drives external load; sinks 5 mA, sources 5 mA; swings to within 9 mV of ground. |
| 2 (INA+) | Amplifier A noninverting input | High-impedance node (12 GΩ common-mode, 2 GΩ differential); accepts signals down to ground. |
| 3 (INA–) | Amplifier A inverting input | Matches INA+ in bias current and offset; enables precision feedback configurations. |
| 4 (V–) | Negative supply rail | Connects to ground in single-supply mode; supports dual-supply operation down to –22 V. |
| 5 (V+) | Positive supply rail | Accepts 2.2 V to +22 V; fully specified at 3 V and 5 V single supplies. |
| 6 (INB–) | Amplifier B inverting input | Electrically isolated from other inputs; matched to INB+ for common-mode rejection. |
| 7 (INB+) | Amplifier B noninverting input | Same input structure as INA+; supports independent biasing per channel. |
| 8 (OUTB) | Amplifier B output | Functionally identical to OUTA; enables dual-channel simultaneous signal processing. |
| 9 (INC+) | Amplifier C noninverting input | Third independent input pair; maintains same offset and noise specs as channels A/B. |
| 10 (INC–) | Amplifier C inverting input | Paired with INC+; supports unity-gain buffer or differential gain configurations. |
| 11 (OUTC) | Amplifier C output | Third output; shares same drive capability and rail-swing behavior as OUTA/OUTB. |
| 12 (IND–) | Amplifier D inverting input | Fourth channel input; fully decoupled; allows 4-channel parallel acquisition. |
| 13 (IND+) | Amplifier D noninverting input | Completes quad topology; supports independent gain-setting per amplifier. |
| 14 (OUTD) | Amplifier D output | Final output; enables full 4-channel signal conditioning in one 14-pin DIP footprint. |
Key Features
| Feature | Design Value |
|---|---|
| 17 µA max supply current per amplifier | Reduces total system quiescent power to <70 µA for all four channels - critical for coin-cell or energy-harvesting designs. |
| Input voltage range includes ground | Eliminates need for negative supply or level-shifting circuitry when interfacing with 0–VREF sensors. |
| Rail-to-rail output swing to ground | Enables direct connection to ADC reference rails or logic-level comparators without external pull-down resistors. |
| 70 µV max input offset voltage (25°C) | Supports 16-bit-equivalent resolution in gain-of-100 stages without calibration or trimming. |
| 250 pA max input offset current | Preserves signal integrity with high-Z sources such as piezoelectric sensors or pH electrodes. |
Applications
| Portable Instrumentation | Remote Sensor Amplifier |
|---|---|
|
Use Scenario: Handheld multimeter front-end amplifying µV-level thermocouple or mV-level RTD signals under battery power. IC Role / Device Role / Timing Role: Quad precision op amp providing low-drift, low-power signal conditioning for four independent measurement channels. Use Value: Enables 4½-digit accuracy with <1 µV input-referred noise and no active cooling or recalibration during field use. |
Use Scenario: Wireless environmental node measuring temperature, humidity, and gas concentration using analog-output sensors. IC Role / Device Role / Timing Role: Signal conditioner for multiple high-impedance sensor outputs prior to ADC sampling and RF transmission. Use Value: Delivers stable gain and offset performance across –40°C to +85°C while consuming <70 µA total - extending node lifetime to >5 years on two AA cells. |
| Thermocouple Amplifier | Micropower Sample-and-Hold |
|
Use Scenario: Cold-junction compensation and linearization circuit for Type-K thermocouples in industrial monitoring systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core (using two MAX479CPD+ op amps per channel) rejecting millivolt-level common-mode noise. Use Value: Achieves <±1°C accuracy over 0–1000°C range with only passive component matching - no digital correction required. |
Use Scenario: Low-power data acquisition module capturing slow-varying biosignals (e.g., ECG, EEG) in wearable devices. IC Role / Device Role / Timing Role: Unity-gain buffer and hold amplifier maintaining signal fidelity during ADC conversion cycles. Use Value: Holds voltage with <1 µV/s droop over 10 ms using internal 10 pF hold capacitor - eliminating external sample-hold ICs and reducing BOM count. |
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 |
|---|---|---|---|
| TLV2474IDR | Higher supply current (600 µA per amp), wider GBW (2.8 MHz), but 3.5 mV offset voltage - not precision-grade. | Suitable for general-purpose amplification where speed matters more than dc accuracy or battery life. | Select only if bandwidth >100 kHz is required and offset drift tolerance exceeds ±500 µV/°C. |
| OPA2333PWR | Zero-drift architecture (0.02 µV/°C), lower noise (0.65 µVpp), but 17 µA supply current per amp and SO-8 packaging - no quad DIP option. | Better for ultra-low-drift applications needing chopper stabilization, but requires PCB redesign for SO-14 or dual-SO-8 layout. | Prefer when long-term stability dominates over legacy through-hole compatibility or multi-channel integration density. |
Compared with MAX479CPD+, TLV2474IDR trades precision and micropower for bandwidth, while OPA2333PWR improves drift and noise at the cost of package compatibility and design continuity - making MAX479CPD+ uniquely suited for drop-in replacement in existing DIP-based, battery-constrained instrumentation.
Availability
MAX479CPD+ is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor amplifiers, and thermocouple interface circuits requiring stable component supply and legacy through-hole compatibility.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX478/MAX479 family was designed specifically for micropower, single-supply precision amplification in space- and energy-constrained systems - targeting battery-operated test equipment and distributed sensor networks.
FAQ
Is MAX479CPD+ still recommended for new designs?
No. Maxim explicitly states "Not Recommended for New Designs" due to discontinuation of the wafer process used to manufacture MAX479CPD+. The datasheet remains available for legacy support, and Maxim recommends evaluating replacements like the MAX44260 or industry alternatives. MAX479CPD+ is supported only for existing designs with documented continuity plans.
What is the maximum operating supply voltage for MAX479CPD+?
The absolute maximum supply voltage for MAX479CPD+ is ±22 V, with guaranteed operation from 2.2 V to 12 V single supply or ±1.5 V to ±15 V dual supply. At 5 V single supply, all key parameters - including offset voltage, CMRR, and output swing - are fully specified across 0°C to +70°C.
Does MAX479CPD+ support rail-to-rail input and output?
MAX479CPD+ supports rail-to-rail output swing (to within 9 mV of ground and within 0.2 V of V+) and input common-mode range that includes ground - but does not support input voltages beyond the supply rails. Its input voltage range is limited to ground up to (V+ – 1.5 V) at 5 V supply.
Can MAX479CPD+ drive capacitive loads without oscillation?
Yes. MAX479CPD+ is stable with capacitive loads up to 1000 pF in unity-gain configuration, as confirmed by typical operating characteristics showing <10% overshoot at 1000 pF. For loads >100 pF, a series resistor (≥100 Ω) between output and capacitance is recommended to maintain phase margin.
What is the thermal performance of MAX479CPD+ in plastic DIP package?
In its 14-pin plastic DIP package, MAX479CPD+ has a thermal resistance θJA of 100°C/W. At maximum rated dissipation of 800 mW (TA = +70°C), junction temperature rise is ≤80°C - limiting safe continuous operation to ambient temperatures ≤90°C when fully loaded across all four amplifiers.
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:
- Discontinued at Digi-Key
- 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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