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Analog Devices Inc./Maxim Integrated MAX474EPA+
- Part No.:
- MAX474EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX474EPA+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,408
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Product details
Overview
MAX474EPA+ from Maxim Integrated is a dual, single-supply operational amplifier optimized for low-voltage portable systems. It delivers 10MHz unity-gain bandwidth, 15V/µs slew rate, rail-to-rail output swing (within ±50mV of rails), 2mA per amplifier supply current, and input voltage range extending to the negative rail. It is used in battery-powered instrumentation signal conditioning stages where precision, speed, and low power coexist.
For engineers reviewing the MAX474EPA+ datasheet, MAX474EPA+ pinout, MAX474EPA+ application, or MAX474EPA+ equivalent, key selection criteria include guaranteed 10MHz bandwidth at 3V operation, rail-to-rail output drive into 600Ω, −40°C to +85°C temperature rating, and compatibility with industry-standard 8-pin DIP pinout for drop-in replacement in legacy analog signal paths.
Technical Context
The MAX474EPA+ implements a bipolar input stage with output stage designed for rail-to-rail swing using complementary emitter-follower outputs. Its unity-gain stability is verified with 10kΩ || 20pF load and 63° phase margin, enabling use in high-speed buffer, active filter, and servo-loop configurations without external compensation.
It operates from a single 2.7V to 5.25V supply or dual ±1.35V to ±2.625V supplies. Input bias currents flow out of both inputs (typ. 0–175nA), requiring matched source impedances to minimize offset error - a design consideration critical in precision inverting and noninverting gain stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 10MHz (guaranteed minimum; enables stable amplification up to 10MHz in unity-gain follower configuration) |
| Slew Rate | 15V/µs min (supports full-power bandwidth of ~2.4MHz at 1VPP output, critical for fast transient response) |
| Supply Current per Amp | 2mA (enables dual-channel operation at <5mA total, suitable for battery life-sensitive designs) |
| Rail-to-Rail Output | Swings to within 50mV of VEE and VCC (maximizes dynamic range in 3V systems, e.g., 0.05V–2.95V output span) |
| Input Voltage Range | Includes VEE (0V in single-supply mode), allowing ground-referenced sensor inputs without level-shifting) |
| Operating Temp Range | −40°C to +85°C (qualified for industrial-grade embedded control and portable test equipment) |
| Small-Signal Settling Time | 400ns to 0.1% (with 10kΩ/20pF load; supports high-throughput data acquisition front-ends) |
Pinout & Package
MAX474EPA+ is housed in an 8-pin plastic DIP package (0.300" wide), compatible with standard through-hole PCB assembly and socketing. Pin layout follows industry-standard dual op amp configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output; drives loads up to 600Ω while maintaining rail-to-rail swing and stability |
| 2 | INA− | Inverting input of Amplifier A; requires matched impedance to INA+ to minimize bias-current-induced offset |
| 3 | INA+ | Noninverting input of Amplifier A; accepts signals down to VEE (0V) in single-supply mode |
| 4 | VEE | Negative supply pin; connected to ground in single-supply operation; substrate tied to this pin |
| 5 | INB+ | Noninverting input of Amplifier B; electrically isolated from Amplifier A; supports independent signal paths |
| 6 | INB− | Inverting input of Amplifier B; same bias current behavior and matching requirements as INA− |
| 7 | OUTB | Amplifier B output; identical AC/DC performance to OUTA; enables dual-channel signal processing on one IC |
| 8 | VCC | Positive supply pin; accepts 2.7V–5.25V; requires 0.1µF ceramic bypass capacitor to ground for stability |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable 2.9Vpp output from 3V supply, preserving >96% of theoretical dynamic range |
| 15V/µs min slew rate | Enables accurate reproduction of 1MHz square waves with <10ns edge distortion in unity-gain buffer |
| Input includes negative rail | Eliminates need for input biasing networks when interfacing with 0V-referenced sensors or DACs |
| Short-circuit protected outputs | Withstands indefinite output short to VEE or VCC without damage or parameter shift during fault recovery |
| Unity-gain stable | Operates reliably in gain = 1 configuration with 10kΩ || 20pF load-no external compensation required |
Applications
| Battery-Powered Instrumentation | Portable Signal Conditioning |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying mV-level thermocouple or shunt voltage signals before ADC sampling. IC Role / Device Role / Timing Role: Dual-channel DC-coupled amplifier providing gain, offset correction, and drive capability for 16-bit SAR ADC inputs. Use Value: Rail-to-rail output ensures full utilization of 3V ADC reference; 2mA per amp minimizes battery drain during continuous measurement mode. | Use Scenario: Wearable health monitor conditioning ECG electrode signals prior to digitization and Bluetooth transmission. IC Role / Device Role / Timing Role: Dual op amp configured as high-pass filter (lead-lag) and gain stage, rejecting DC electrode offset and amplifying 0.5–40Hz biopotential waveforms. Use Value: 10MHz bandwidth accommodates fast-settling filter transients; input range to VEE allows direct connection to Ag/AgCl electrodes without bias voltage generation. |
| Discrete Active Filters | Servo-Loop Error Amplifiers |
Use Scenario: 4th-order bandpass filter in ultrasonic distance sensor receiver chain, centered at 190kHz with Q = 10. IC Role / Device Role / Timing Role: Quad implementation (using two MAX474EPA+ units) as 1/4 sections of multiple-feedback topology, each handling one pole pair. Use Value: 15V/µs slew rate prevents waveform distortion at peak envelope amplitude; unity-gain stability avoids oscillation in high-Q feedback loops. | Use Scenario: Position-control loop in compact CNC stage, comparing encoder feedback to commanded trajectory and driving H-bridge gate driver. IC Role / Device Role / Timing Role: Dual op amp serving as summing amplifier (error computation) and integrator (type-1 compensation) in analog PID core. Use Value: Low input offset (±2.5mV max) reduces steady-state position error; 2mA quiescent current enables always-on loop operation without thermal drift escalation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, rail-to-rail output op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV722MM/NOPB | Lower 10MHz GBW (10MHz vs. 10MHz), higher 1.2mA supply current, wider 2.7–5.5V supply range, no input rail inclusion | Not suitable for true ground-sensing inputs; better for 5V systems with tighter current budget | Select LMV722MM/NOPB only if input common-mode range above VEE is acceptable and lower cost is prioritized over input flexibility |
| AD8642ARZ | Higher 3.5MHz GBW, lower 1.2mA supply current, rail-to-rail input/output, ±125µV max VOS (vs. ±2.5mV) | Superior DC precision but insufficient bandwidth for >3MHz small-signal applications | Choose AD8642ARZ for low-frequency, high-accuracy applications like sensor bridges; avoid for >5MHz signal paths where MAX474EPA+ bandwidth is essential |
Compared with LMV722MM/NOPB and AD8642ARZ, the MAX474EPA+ uniquely balances 10MHz bandwidth, rail-to-rail input (to VEE), and 2mA per amplifier consumption - making it irreplaceable in 3V portable systems requiring both speed and ground-referenced signal acquisition.
Availability
MAX474EPA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable signal conditioning, discrete active filters, and servo-loop error amplifiers requiring stable component supply across industrial temperature ranges.
Supply support for MAX474EPA+ 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX473/MAX474/MAX475 family was engineered to deliver high-speed, rail-to-rail performance in single-supply portable systems - addressing the need for precision amplification without dual-rail power infrastructure.
FAQ
What is the maximum operating supply voltage for MAX474EPA+?
The absolute maximum supply voltage (VCC – VEE) for MAX474EPA+ is 7V. Its recommended operating range is +2.7V to +5.25V for single-supply use (VEE = 0V) or ±1.35V to ±2.625V for dual-supply operation. Exceeding 5.25V in single-supply mode risks parametric degradation and reduced reliability, as confirmed in the Absolute Maximum Ratings table of the official datasheet.
Does MAX474EPA+ support rail-to-rail input?
No, MAX474EPA+ does not support rail-to-rail input. Its input common-mode voltage range extends to the negative rail (VEE) but stops at (VCC – 1.9V) for standard operation - meaning it cannot accept signals near VCC. This is explicitly specified in the Electrical Characteristics tables across all temperature grades. For true rail-to-rail input, designers must select alternatives such as AD8642ARZ.
Is MAX474EPA+ pin-compatible with other packages in the MAX474 family?
Yes, MAX474EPA+ (8-pin plastic DIP) shares identical pinout with MAX474CPA (commercial temp DIP), MAX474ESA (SO), and MAX474CUA (µMAX). All variants use the same 8-pin dual op amp configuration shown in the Pin Configurations diagram - enabling direct PCB footprint reuse across temperature and package variants without layout changes.
What is the typical phase margin of MAX474EPA+ under standard load conditions?
The typical phase margin of MAX474EPA+ is 63° when driving a 10kΩ load in parallel with 20pF capacitance at TA = +25°C. This value is measured in unity-gain follower configuration and guarantees stability without external compensation - a key specification validated in the Electrical Characteristics section and Typical Operating Characteristics plot TOC-04.
Can MAX474EPA+ drive capacitive loads directly?
MAX474EPA+ can drive moderate capacitive loads (≤100pF) directly with stable operation. For loads >100pF, stability degrades due to added phase shift; the datasheet recommends adding a 10Ω isolation resistor in series with the output (Figure 4) to restore phase margin. This technique is verified to support 1000pF loads without oscillation, as shown in Typical Operating Characteristic TOC-05.
MAX474EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 2mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX474EPA+ FAQ
1.How can I place an order for MAX474EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX474EPA+ 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 MAX474EPA+ reliable?
The price and inventory of MAX474EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX474EPA+ is usually 5 days.
3.What payment methods are accepted for MAX474EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX474EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX474EPA+?
MAX474EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX474EPA+ 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 MAX474EPA+?
For technical support, including MAX474EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX474EPA+ requirements.
6.How does Aetrix verify that MAX474EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX474EPA+ 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 MAX474EPA+ meets industry standards.
7.What is the process for return or replacement of MAX474EPA+?
All MAX474EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX474EPA+, 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 MAX474EPA+ part is unused and in its original packaging.
Return procedure for MAX474EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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