My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX495MJA
- Part No.:
- MAX495MJA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX495MJA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:953
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX495MJA from Maxim Integrated is a single, micropower, rail-to-rail input/output operational amplifier optimized for low-voltage, battery-powered systems. It operates from +2.7V to +6V single supply (or ±1.35V to ±3V dual), draws ≤200µA quiescent current per amplifier at -55°C to +125°C, delivers rail-to-rail output swing within 50mV of rails into 100kΩ, and features 200µV max input offset voltage at +25°C - enabling precision signal conditioning in portable instrumentation and data acquisition front-ends.
For engineers reviewing the MAX495MJA datasheet, MAX495MJA pinout, MAX495MJA application, or MAX495MJA equivalent, key selection criteria include its extended temperature range (-55°C to +125°C), CERDIP package suitability for high-reliability military/aerospace use, rail-to-rail DC accuracy under low supply current, and compatibility with capacitive loads >1nF without external compensation.
Technical Context
The MAX495MJA employs complementary NPN/PNP input stages to achieve rail-to-rail common-mode input range (VEE – 0.05V to VCC + 0.05V at -55°C to +125°C) with no phase reversal on overdrive. Its folded-cascode architecture supports unity-gain stability and 500kHz gain-bandwidth product while maintaining 82dB min large-signal voltage gain across the full temperature range.
Offset nulling is implemented via two dedicated NULL pins (1 and 5), allowing ±6mV trim range using a 10kΩ potentiometer tied to VEE - a capability exclusive to the MAX495 variant and not available on MAX492/MAX494. Input bias current remains below ±200nA across -55°C to +125°C, supporting high-impedance sensor interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6V single supply; enables direct operation from Li-ion or two-AA batteries |
| Quiescent Current | ≤200µA per amplifier at -55°C to +125°C; extends battery life in always-on monitoring systems |
| Input Offset Voltage | ±1.2mV max at -55°C to +125°C; ensures <0.5 LSB error when buffering 12-bit ADCs like MAX187 |
| Output Voltage Swing | Within 50mV of VEE/VCC into 100kΩ load; maximizes dynamic range in 3V systems |
| Gain-Bandwidth Product | 500kHz; supports stable unity-gain buffering of baseband sensor signals up to ~50kHz |
| Common-Mode Input Range | VEE – 0.05V to VCC + 0.05V at full temp range; accepts inputs beyond supply rails without latchup |
| Capacitive Load Drive | Stable with >1nF loads; eliminates need for isolation resistors in ADC input buffers |
Pinout & Package
MAX495MJA is supplied in an 8-pin CERDIP (Ceramic Dual In-line Package) with hermetic sealing, rated for -55°C to +125°C operation and suitable for high-reliability aerospace and defense applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NULL | Offset null input terminal; connects to wiper of 10kΩ potentiometer for precision input offset trimming |
| 2 | IN1– | Inverting input of the single op amp; differential input stage accepts rail-to-rail common-mode voltages |
| 3 | IN1+ | Noninverting input of the single op amp; matched impedance path required to minimize bias-current-induced offset |
| 4 | VEE | Negative power supply pin; connected to ground in single-supply configurations; substrate tied to this pin |
| 5 | NULL | Second offset null input terminal; forms trim network with Pin 1 and VEE (Pin 4) |
| 6 | OUT | Amplifier output; rail-to-rail swing supports full-scale signal utilization in low-voltage ADC interfaces |
| 7 | VCC | Positive power supply pin; bypass with 1µF + 0.1µF ceramic capacitors for stable low-noise operation |
| 8 | N.C. | No connect; not internally bonded; must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 50mV beyond VEE/VCC at full temperature range, enabling direct sensing of grounded or supply-referenced signals |
| Offset voltage trim capability | Dedicated NULL pins (1 & 5) support ±6mV adjustment - critical for precision DC-coupled measurement chains |
| Capacitive load stability | Drives >1000pF without oscillation; eliminates external isolation resistors in ADC buffer designs |
| Low input bias current | ±200nA max at -55°C to +125°C; preserves accuracy with high-source-impedance sensors (e.g., pH electrodes) |
| High PSRR/CMRR | 76dB min PSRR and 66dB min CMRR at full temperature range; rejects supply noise and common-mode interference in noisy environments |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Amplifying low-level biopotential signals (ECG, EEG) from dry electrodes in handheld diagnostic devices. IC Role / Device Role / Timing Role: Precision DC-coupled buffer with rail-to-rail input to capture sub-mV signals referenced to battery ground. Use Value: 200µV offset and 25nV/√Hz input noise ensure <1µV RMS error; 200µA supply current extends 7-day runtime on coin-cell battery. |
Use Scenario: Conditioning thermistor and RTD outputs in remote environmental monitoring nodes powered by solar-charged LiFePO₄. IC Role / Device Role / Timing Role: Low-drift, low-power signal conditioner driving SAR ADC inputs with minimal power overhead. Use Value: ±1.2mV offset drift over -40°C to +85°C maintains ±0.1°C temperature accuracy; CERDIP package ensures long-term reliability in uncontrolled enclosures. |
| Industrial Process Transmitters | Avionics Sensor Interfaces |
Use Scenario: Isolating and scaling 4–20mA loop signals in hazardous-area field transmitters with intrinsic safety barriers. IC Role / Device Role / Timing Role: Rail-to-rail I/V converter and gain stage operating from isolated 3.3V supply derived from loop energy. Use Value: 500kHz GBW supports fast transient response to valve position changes; 200µA quiescent current minimizes loop burden. |
Use Scenario: Buffering strain-gauge bridge outputs in flight control surface position sensors exposed to -55°C cold-soak and +125°C engine bay temperatures. IC Role / Device Role / Timing Role: Hermetically sealed, radiation-tolerant signal conditioner with guaranteed performance across MIL-STD-883 temperature extremes. Use Value: CERDIP package and -55°C to +125°C rating meet DO-160 Section 22 Category D requirements; 82dB min open-loop gain ensures stable closed-loop calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321MFX/NOPB | Lower max offset (1.8mV vs 1.2mV), wider temp range (-40°C to +125°C), but no offset null pins and only SO-5 package | Not qualified for military/aerospace; lacks hermetic CERDIP; unsuitable where offset trim or extended reliability required | Select only for commercial-grade cost-sensitive designs where trim capability and hermetic sealing are unnecessary |
| AD8601ARTZ-REEL7 | Higher precision (60µV max offset), lower noise (12nV/√Hz), but 130µA typical supply current and only SOT-23-5 package | Not rated beyond +125°C; no NULL pins; limited output drive into heavy capacitive loads (>500pF) | Prefer for ultra-low-noise, high-accuracy lab equipment; avoid in high-temp or high-capacitance ADC buffer roles |
Compared with LMV321MFX/NOPB and AD8601ARTZ-REEL7, MAX495MJA uniquely combines military-grade temperature range, hermetic CERDIP packaging, user-adjustable offset nulling, and proven >1nF capacitive load stability - making it irreplaceable in legacy avionics and ruggedized industrial systems where qualification continuity matters.
Availability
MAX495MJA is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial process transmitters requiring stable component supply with long-term obsolescence management.
Supply support for MAX495MJA 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 demanding industrial, automotive, and communications applications.
The MAX495 belongs to Maxim's micropower rail-to-rail op amp family, designed specifically for precision, low-voltage signal conditioning in battery-constrained and wide-temperature environments - with variants tailored for commercial, industrial, and military-grade deployment.
FAQ
What is the maximum operating temperature range for MAX495MJA?
The MAX495MJA is rated for continuous operation from -55°C to +125°C, as confirmed by its MIL-qualified CERDIP packaging and electrical specifications tested across this full range. This exceeds the -40°C to +85°C range of commercial variants like MAX495CPA and makes MAX495MJA suitable for engine bay, avionics, and downhole applications where thermal extremes are routine. The datasheet specifies all DC parameters - including supply current (≤200µA), offset voltage (±1.2mV), and CMRR (66dB min) - at these endpoints.
Does MAX495MJA support offset voltage trimming, and how is it implemented?
Yes, MAX495MJA supports precision offset trimming via dedicated NULL pins (1 and 5). A 10kΩ potentiometer is connected between these pins, with its wiper tied to VEE (Pin 4), providing ±6mV adjustment range. This feature is exclusive to the MAX495 series - MAX492 and MAX494 lack NULL pins. Trimming corrects initial offset and low-frequency drift, critical for DC-coupled applications like precision weigh scales or thermocouple amplifiers where even 100µV error degrades system accuracy.
Can MAX495MJA drive large capacitive loads, and what is the stability limit?
Yes, MAX495MJA is explicitly characterized for stability with capacitive loads exceeding 1nF. The datasheet confirms stable operation with 1000pF pure capacitance (Figure 6) and defines a stable region up to 400pF even when sourcing ~100µA (Figure 5). Unlike many rail-to-rail op amps, it requires no external isolation resistor for typical ADC input buffering. This capability stems from its internal compensation and low-output-impedance design, directly reducing design risk in data acquisition systems where long traces or ADC input capacitance introduce instability.
What package type is used for MAX495MJA, and why is it significant?
MAX495MJA uses an 8-pin CERDIP (Ceramic Dual In-line Package), a hermetically sealed ceramic housing with tin-lead leads. This package provides superior moisture resistance, thermal cycling endurance, and long-term reliability compared to plastic SO or DIP variants. Its significance lies in qualification for high-reliability applications - including MIL-STD-883 testing - making MAX495MJA appropriate for aerospace, defense, and oilfield electronics where field failure is unacceptable and lifetime operation exceeds 15 years.
Is MAX495MJA recommended for new designs, and what are the implications?
No - Maxim explicitly states "Not Recommended for New Designs" due to discontinuation of the wafer fabrication process. However, MAX495MJA remains available through authorized distributors and Aetrix Electronics for legacy system repair, sustainment, and obsolescence management. For new designs, engineers should evaluate functional alternatives like AD8601 or LMV321, but must verify that those parts meet the same offset trim, temperature, packaging, and capacitive-load requirements - as none replicate the exact combination offered by MAX495MJA.
MAX495MJA 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:
- 0.2V/µs
- Gain Bandwidth Product:
- 500 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 150µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
MAX495MJA FAQ
1.How can I place an order for MAX495MJA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX495MJA 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 MAX495MJA reliable?
The price and inventory of MAX495MJA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX495MJA is usually 5 days.
3.What payment methods are accepted for MAX495MJA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX495MJA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX495MJA?
MAX495MJA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX495MJA 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 MAX495MJA?
For technical support, including MAX495MJA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX495MJA requirements.
6.How does Aetrix verify that MAX495MJA is sourced from the original manufacturer or authorized distributors?
All MAX495MJA 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 MAX495MJA meets industry standards.
7.What is the process for return or replacement of MAX495MJA?
All MAX495MJA units undergo pre-shipment inspection (PSI). If there is an issue with MAX495MJA, 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 MAX495MJA part is unused and in its original packaging.
Return procedure for MAX495MJA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX495MJA 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…
