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Analog Devices Inc./Maxim Integrated MAX473MJA
- Part No.:
- MAX473MJA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX473MJA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,060
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Product details
Overview
The MAX473MJA from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier optimized for high-speed, low-voltage, single-supply operation. It delivers 10MHz unity-gain bandwidth, 15V/µs slew rate, ±2.0mV input offset voltage (max at +25°C), 2mA supply current per amplifier, and rail-to-rail output swing within ±50mV of both rails - enabling precision signal conditioning in battery-powered instrumentation and portable equipment.
For engineers reviewing the MAX473MJA datasheet, MAX473MJA pinout, MAX473MJA application, or MAX473MJA equivalent, this page provides verified technical context, package-specific pin definitions, real-world design meaning of key specs, and validated alternative options for legacy design support and obsolescence mitigation.
Technical Context
The MAX473MJA is a bipolar-input, unity-gain-stable op amp designed for single-supply operation from +2.7V to +5.25V (or dual ±1.35V to ±2.625V). Its input stage includes the negative rail (VEE), and its output swings to within 50mV of VEE and VCC - critical for maximizing dynamic range in 3V systems.
It guarantees 10MHz unity-gain bandwidth correlated to a minimum 15V/µs slew rate, supports 600Ω load drive capability, and features short-circuit protected outputs. The -55°C to +125°C operating temperature range and CERDIP package confirm its qualification for military/aerospace and harsh-environment industrial applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +5.25V single supply (±1.35V to ±2.625V dual) - enables direct interface with 3V logic and Li-ion battery systems without level-shifting. |
| Unity-Gain Bandwidth | 10MHz (guaranteed) - supports stable closed-loop gain ≥1 up to 10MHz, suitable for active filters and fast-settling buffers. |
| Slew Rate | 15V/µs min - ensures ≤700ns settling to 0.1% for 1V step, critical for pulse amplification and DAC output buffering. |
| Input Offset Voltage | ±2.0mV max at +25°C (±4.0mV over full -55°C to +125°C range) - defines DC accuracy limit in precision sensor front-ends. |
| Supply Current | 2.0mA per amplifier (typical at +25°C) - balances speed and power for always-on portable instrumentation. |
| Rail-to-Rail Output | Swings to within 50mV of VEE and VCC - preserves >96% of available voltage headroom at 3V supply for maximum SNR. |
| Input Common-Mode Range | Includes VEE (ground) - allows direct sensing of signals referenced to system ground in single-supply configurations. |
Pinout & Package
MAX473MJA is housed in an 8-pin CERDIP (Ceramic Dual In-line Package) with hermetic sealing, rated for -55°C to +125°C operation and qualified for high-reliability military applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads up to 600Ω; short-circuit protected; rail-to-rail swing (VEE + 0.05V to VCC – 0.05V). |
| 2 | IN– | Inverting input - high-impedance node; bias current flows out (nA-level); matched external resistor required to minimize offset error. |
| 3 | IN+ | Noninverting input - same bias behavior as IN–; used for unity-gain buffer or noninverting amplifier configurations. |
| 4 | VEE | Negative supply pin - connected to ground in single-supply mode; substrate tied to VEE per chip topography. |
| 5 | NULL | No-connect - not internally bonded; must be left floating or grounded per layout best practice (no internal connection). |
| 6 | NULL | No-connect - identical function to Pin 5; unused terminal in MAX473 topology. |
| 7 | VCC | Positive supply pin - accepts +2.7V to +5.25V; requires 0.1µF ceramic bypass capacitor to ground for stability. |
| 8 | NULL | Offset null - dedicated pin for external 2kΩ trim potentiometer (wiper to VEE) to reduce input offset voltage; only available on MAX473 variants. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Output reaches within 50mV of both supply rails - maximizes usable dynamic range in low-voltage 3V systems without clipping. |
| 15V/µs minimum slew rate | Enables accurate reproduction of fast transients (e.g., DAC steps, pulse edges) with <700ns 0.1% settling time. |
| Unity-gain stability | Stable in gain-of-1 configuration with capacitive loads up to 20pF; phase margin ≥58° ensures robustness in feedback loops. |
| Input range includes VEE | Accepts signals down to ground in single-supply mode - eliminates need for level-shifting in sensor interfaces tied to 0V reference. |
| Offset null capability | Pin 8 supports external trimming of input offset voltage to sub-mV levels - essential for DC-coupled precision measurement paths. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Amplifying low-amplitude biopotential signals (ECG, EMG) from dry electrodes in handheld diagnostic devices. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier front-end with rail-to-rail output driving 12-bit SAR ADC reference buffer. Use Value: 10MHz bandwidth preserves signal integrity up to 100kHz harmonics; 2mA quiescent current extends battery life beyond 100 hours on two AA cells. |
Use Scenario: Conditioning thermistor and RTD bridge outputs in field-deployable environmental monitors powered by Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset null (Pin 8) compensating for thermal drift across -40°C to +85°C ambient. Use Value: ±2.0mV max VOS at +25°C and guaranteed rail-to-rail swing ensure full-scale utilization of 3.3V ADC input range under varying supply conditions. |
| Aerospace Telemetry Signal Chain | Industrial Servo Position Feedback |
|
Use Scenario: Buffering and filtering analog telemetry outputs (voltage, current) in satellite subsystems requiring extended temperature operation. IC Role / Device Role / Timing Role: High-reliability signal conditioner in hermetically sealed CERDIP package, interfacing with isolated ADCs in radiation-tolerant designs. Use Value: -55°C to +125°C rating and 8-pin CERDIP packaging meet MIL-PRF-38535 Class K requirements for space-grade analog signal integrity. |
Use Scenario: Closed-loop position error amplification in brushless DC motor controllers using Hall-effect or resolver feedback. IC Role / Device Role / Timing Role: Fast-settling servo-loop integrator with 15V/µs slew rate ensuring <1µs response to position error steps in real-time control loops. Use Value: Unity-gain stability and 600Ω drive capability allow direct interface with low-impedance PWM modulator inputs without external buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-supply, high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4478ASA+ | Higher precision (±50µV VOS), lower noise (11nV/√Hz), but 3.5MHz GBW and 2.7V–5.5V supply - slower, quieter, more accurate. | Preferred for DC-critical sensor signal chains where bandwidth <4MHz suffices and ultra-low offset is mandatory. | Select MAX4478ASA+ when VOS <100µV and noise <15nV/√Hz are required; avoid if >5MHz bandwidth needed. |
| AD8605ARTZ-REEL7 | Rail-to-rail I/O, 10MHz GBW, 5V/µs slew rate, 1mA IS, -40°C to +125°C - lower power, lower speed, same temp range, SO-8 package. | Better suited for ultra-low-power portable systems where 5V/µs slew rate meets timing budget and 1mA IS extends battery life. | Choose AD8605ARTZ-REEL7 for new designs prioritizing power efficiency over slew performance; not drop-in due to lower SR and different pinout. |
Compared with MAX473MJA, MAX4478ASA+ trades bandwidth for precision and noise performance, while AD8605ARTZ-REEL7 reduces supply current by 50% at the cost of slew rate - making each viable for distinct legacy refresh or obsolescence mitigation paths based on DC accuracy, speed, or power priorities.
Availability
MAX473MJA is available at Aetrix Electronics and suitable for aerospace telemetry, ruggedized industrial instrumentation, and military-grade portable test equipment requiring stable component supply across extreme temperature environments.
Supply support for MAX473MJA 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 computing markets.
The MAX473/MAX474/MAX475 family was engineered for single-supply, high-speed signal conditioning in portable and battery-operated systems - emphasizing rail-to-rail output, low quiescent current, and wide temperature operation without sacrificing bandwidth or drive strength.
FAQ
What is the operating temperature range of the MAX473MJA?
The MAX473MJA is specified for operation from -55°C to +125°C, with junction temperature rated up to +175°C. This extended range, combined with its 8-pin CERDIP hermetic package, qualifies it for military, aerospace, and high-reliability industrial applications where commercial or industrial grade op amps would fail.
Is the MAX473MJA pin-compatible with other MAX473 variants like MAX473CPA or MAX473ESA?
Yes - all MAX473 variants (including MAX473MJA, MAX473CPA, MAX473ESA, and MAX473CUA) share identical 8-pin DIP/SO/µMAX/CERDIP pinouts per the official Maxim pin configuration diagram. Pin 1 is OUT, Pin 2 is IN–, Pin 3 is IN+, Pin 4 is VEE, Pins 5–6 are NULL, Pin 7 is VCC, and Pin 8 is OFFSET NULL - ensuring mechanical and electrical interchangeability within the same package type.
Does the MAX473MJA support dual-supply operation?
Yes - the MAX473MJA operates from dual supplies of ±1.35V to ±2.625V, in addition to its primary single-supply range of +2.7V to +5.25V. When used in dual mode, VEE connects to the negative rail (e.g., -2.5V) and VCC to the positive rail (e.g., +2.5V), maintaining rail-to-rail output swing and input common-mode range centered around ground.
What is the purpose of Pin 8 (OFFSET NULL) on the MAX473MJA?
Pin 8 on the MAX473MJA is the offset null terminal, allowing external adjustment of input offset voltage using a 2kΩ potentiometer wired between Pins 1/8 (wiper to VEE). This feature is unique to the MAX473 (single-channel) and unavailable on MAX474/MAX475 - enabling sub-millivolt DC accuracy in precision measurement circuits where factory-trimmed VOS is insufficient.
Why is the MAX473MJA marked "Not Recommended for New Designs"?
The MAX473MJA is marked "Not Recommended for New Designs" because it was manufactured using a wafer process no longer available at Maxim's external foundry. While fully functional and supported for existing designs, Maxim advises new projects to evaluate modern alternatives like the MAX4478 or AD8605 that offer improved specs, active supply, and long-term availability - though MAX473MJA remains available through Aetrix for legacy continuity.
MAX473MJA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
MAX473MJA FAQ
1.How can I place an order for MAX473MJA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX473MJA 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 MAX473MJA reliable?
The price and inventory of MAX473MJA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX473MJA is usually 5 days.
3.What payment methods are accepted for MAX473MJA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX473MJA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX473MJA?
MAX473MJA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX473MJA 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 MAX473MJA?
For technical support, including MAX473MJA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX473MJA requirements.
6.How does Aetrix verify that MAX473MJA is sourced from the original manufacturer or authorized distributors?
All MAX473MJA 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 MAX473MJA meets industry standards.
7.What is the process for return or replacement of MAX473MJA?
All MAX473MJA units undergo pre-shipment inspection (PSI). If there is an issue with MAX473MJA, 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 MAX473MJA part is unused and in its original packaging.
Return procedure for MAX473MJA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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