My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX479CSD
- Part No.:
- MAX479CSD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX479CSD.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,073
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX479CSD from Maxim Integrated is a quad, single-supply, precision operational amplifier in 14-pin SO package, delivering 17 µA max supply current per amplifier, 90 µV max input offset voltage (at +25°C), and 0.8 µV/°C max offset drift over 0°C to +70°C. It operates from 2.2V to ±22V supplies, supports rail-to-rail output swing to ground, and targets ultra-low-power sensor signal conditioning in battery-powered instrumentation.
For engineers reviewing the MAX479CSD datasheet, MAX479CSD pinout, MAX479CSD application, or MAX479CSD equivalent, key selection criteria include guaranteed 5V/3V operation, input common-mode range extending to ground, 250 pA max input offset current, and compatibility with micropower differential amplifier topologies requiring high input impedance and low noise.
Technical Context
The MAX479CSD integrates four independent precision op amps on a single die, each optimized for micro-power operation with bipolar input stage and proprietary trimming for low offset and drift. Its architecture enables true single-supply functionality: inputs accept signals down to ground, and outputs sink current to within 8 mV of ground at no load (5V supply).
It features matched channel characteristics-130 dB typical channel separation-and operates across wide supply ranges (±15V, 5V, 3V), with guaranteed specs at 5V/0V and 3V/0V. The device uses Maxim's legacy bipolar process, not recommended for new designs due to wafer foundry discontinuation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 14–21 µA at 5V (enables >1-year battery life in 10 µA avg system) |
| Input Offset Voltage | 90 µV max (0°C to +70°C) - reduces DC error in thermocouple/sensor front-ends |
| Offset Voltage Drift | 0.8 µV/°C max - ensures stable gain accuracy over temperature in portable equipment |
| Input Offset Current | 250 pA max - preserves high-impedance source integrity (e.g., pH electrodes, piezoelectric sensors) |
| Output Swing (Low) | 8 mV above ground (no load, 5V supply) - eliminates need for pull-down resistors, saving power and board space |
| CMRR | 90 dB min (0V–3.4V common-mode) - rejects supply noise and ground bounce in single-supply systems |
| Gain-Bandwidth | 60 kHz (5V supply) - sufficient for DC–10 kHz sensor amplification without stability issues |
Pinout & Package
MAX479CSD is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm × 8.65 mm body, 1.27 mm pitch, JEDEC MS-012 compliant. Pin 1 marked by notch or dot; thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTD | Amplifier D output - drives low-impedance loads to ground or V+; capable of sinking 100 µA with ≤140 mV drop |
| 2 | IND− | Inverting input of Amp D - high-impedance node (12 GΩ common-mode); connects to feedback network |
| 3 | IND+ | Non-inverting input of Amp D - accepts ground-referenced or biased sensor signals |
| 4 | V− | Negative supply rail - tied to ground in single-supply mode; sets lower output limit |
| 5 | V+ | Positive supply rail - accepts 2.2V to +22V; powers all four amplifiers |
| 6 | INA+ | Non-inverting input of Amp A - used for reference or high-Z signal routing in instrumentation configs |
| 7 | INA− | Inverting input of Amp A - forms precision difference amplifier when paired with external resistors |
| 8 | OUTA | Amplifier A output - primary output for first channel; matches OUTB/OUTC/OUTD in drive capability |
| 9 | INC+ | Non-inverting input of Amp C - enables independent biasing of third channel |
| 10 | INC− | Inverting input of Amp C - supports transimpedance or current-sense configurations |
| 11 | OUTC | Amplifier C output - identical electrical specs to OUTA/B/D; supports multi-channel filtering |
| 12 | INB− | Inverting input of Amp B - shares layout symmetry with other inverting inputs for matched PCB routing |
| 13 | INB+ | Non-inverting input of Amp B - used in dual-differential or chopper-assisted topologies |
| 14 | OUTB | Amplifier B output - completes quad set; pin-compatible with MAX479CPD in DIP variant |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation with ground-sensing output | Eliminates pull-down resistors and negative rail generation, reducing BOM count and quiescent power in 3V/5V systems |
| 17 µA max supply current per amplifier | Enables continuous operation from coin-cell batteries (e.g., CR2032) for >2 years in sleep-wake sensor nodes |
| 70 µV max offset voltage (MAX479ACP/CP grade) | Provides <0.01% gain error in 100× gain stages for precision thermopile or strain gauge interfaces |
| 250 pA max input offset current | Maintains signal fidelity with >100 MΩ source impedances, critical for electrochemical and capacitive sensing |
| 130 dB channel separation | Prevents crosstalk between simultaneously sampled channels in multi-sensor data acquisition systems |
Applications
| Portable Instrumentation | Remote Sensor Amplifier |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying mV-level signals from shunt resistors and thermocouples. IC Role / Device Role / Timing Role: Quad op amp configured as two differential amplifiers and two buffer stages for simultaneous voltage/current measurement paths. Use Value: 90 µV max VOS and 0.8 µV/°C drift ensure <0.1% reading accuracy over 0°C–70°C without calibration. |
Use Scenario: Solar-powered environmental node measuring soil moisture via capacitive probe and ambient temperature via thermistor. IC Role / Device Role / Timing Role: Precision amplifier for high-impedance probe interface and low-drift signal conditioning before ADC sampling. Use Value: 250 pA max IOS prevents charge leakage errors; 17 µA per amp extends 10-year battery life target. |
| Thermocouple Amplifier | Micropower Sample-and-Hold |
Use Scenario: Industrial temperature monitor using K-type thermocouple with cold-junction compensation. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier (using 1/4 MAX479CSD) with programmable gain and offset nulling. Use Value: Input range including ground allows direct connection to thermocouple; low drift minimizes temperature error accumulation. |
Use Scenario: Ultra-low-power data logger capturing slow-varying analog signals (e.g., pressure, humidity) at 1 Hz. IC Role / Device Role / Timing Role: Unity-gain buffer driving hold capacitor; fourth amplifier used for reset control logic. Use Value: Output swing to ground enables full 0–VREF utilization; 17 µA quiescent current dominates total system budget. |
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 |
|---|---|---|---|
| MAX44260ASA+ | 2 µA supply current, 10 µV VOS, rail-to-rail I/O, but only dual-channel in 8-pin SO | Requires two devices for quad function; superior specs but higher cost and layout complexity | Preferred for new designs needing lower power and better precision; not pin-compatible |
| OP484ESZ-REEL | 650 µA supply current, 60 µV VOS, ±15V operation, 4 MHz GBW, 14-pin SO | Higher power, wider bandwidth, and industrial temp range (−40°C to +125°C) | Valid alternative where supply current is less constrained and extended temperature is required |
Compared with MAX479CSD, MAX44260ASA+ offers dramatically lower power and offset but lacks quad integration, while OP484ESZ-REEL provides higher performance and ruggedness at 38× higher supply current-making it suitable for industrial environments where longevity and spec margin outweigh micropower needs.
Availability
MAX479CSD is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor interfaces, and thermocouple signal conditioning requiring stable component supply through legacy design support cycles.
Supply support for MAX479CSD 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX478/MAX479 family was designed for ultra-low-power, precision signal conditioning in resource-constrained environments-emphasizing single-supply usability, ground-sensing outputs, and long-term stability for portable and remote measurement systems.
FAQ
Is MAX479CSD recommended for new designs?
No, MAX479CSD is Not Recommended for New Designs. It was manufactured using a discontinued wafer process, and Maxim no longer supports new design-ins. Existing designs may continue using MAX479CSD with full datasheet documentation, but Aetrix recommends evaluating MAX44260ASA+ or OP484ESZ-REEL for replacements. MAX479CSD remains available for legacy production and repair.
What is the maximum operating supply voltage for MAX479CSD?
The absolute maximum supply voltage for MAX479CSD is ±22V, with differential input voltage rating of ±30V. For reliable operation, the recommended supply range is 2.2V to ±15V. At 5V single supply, MAX479CSD delivers full specified performance including input range to ground and output swing within 8 mV of ground-critical for MAX479CSD system-level efficiency.
Does MAX479CSD support rail-to-rail input and output?
MAX479CSD supports rail-to-rail output swing (to within 8 mV of ground and up to 4.3 V at 5V supply) and input common-mode range that includes ground-but does not support full rail-to-rail input (upper limit is 3.5 V at 5V supply). This makes MAX479CSD ideal for ground-referenced sensor interfaces but unsuitable for signals exceeding V+ − 1.5 V without level shifting.
What is the input bias current specification for MAX479CSD?
MAX479CSD has a maximum input bias current of 6 nA and a maximum input offset current of 250 pA at +25°C (0°C to +70°C range). These values ensure minimal loading of high-impedance sources such as thermistors, photodiodes, or pH electrodes-directly enabling accurate signal acquisition in MAX479CSD-based sensor front-ends without external guarding or bootstrapping.
Can MAX479CSD operate from a single 3V supply?
Yes, MAX479CSD is fully specified for 3V single-supply operation (3V/0V), with guaranteed parameters including 17 µA max supply current per amplifier, 120 µV max input offset voltage, and output swing to within 6 mV of ground. Its minimum supply voltage is 2.2V, making MAX479CSD compatible with single lithium-cell (2.7–4.2 V) and alkaline (3×AA) power sources.
MAX479CSD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX479CSD FAQ
1.How can I place an order for MAX479CSD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX479CSD 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 MAX479CSD reliable?
The price and inventory of MAX479CSD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX479CSD is usually 5 days.
3.What payment methods are accepted for MAX479CSD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX479CSD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX479CSD?
MAX479CSD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX479CSD 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 MAX479CSD?
For technical support, including MAX479CSD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX479CSD requirements.
6.How does Aetrix verify that MAX479CSD is sourced from the original manufacturer or authorized distributors?
All MAX479CSD 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 MAX479CSD meets industry standards.
7.What is the process for return or replacement of MAX479CSD?
All MAX479CSD units undergo pre-shipment inspection (PSI). If there is an issue with MAX479CSD, 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 MAX479CSD part is unused and in its original packaging.
Return procedure for MAX479CSD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX479CSD Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
