My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX495ESA-T
- Part No.:
- MAX495ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX495ESA-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,366
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX495ESA-T 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 ≤150µA per amplifier, delivers 500kHz gain-bandwidth, and achieves 200µV max input offset voltage at +25°C - enabling precision signal conditioning in portable instrumentation and data acquisition front-ends.
For engineers reviewing the MAX495ESA-T datasheet, MAX495ESA-T pinout, MAX495ESA-T application, or MAX495ESA-T equivalent, this page provides verified technical context, package-specific pin mapping, real-world application constraints, and validated alternative options for legacy design support and obsolescence mitigation.
Technical Context
The MAX495ESA-T uses complementary NPN/PNP input stages to achieve rail-to-rail common-mode input range (VEE −0.25V to VCC +0.25V) without phase reversal, with a widened 600mV transition region minimizing CMRR degradation. Its folded-cascode architecture supports unity-gain stability while driving ≥1kΩ loads and >1nF capacitive loads.
It features internal input protection diodes (±0.7V clamp) and offset-null capability via pins 1 and 5, allowing ±6mV trimming - a function unavailable on MAX492/MAX494 variants. Quiescent current remains stable across −40°C to +85°C, with typical 150µA at +25°C and 185µA at −40°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6V single supply - enables direct interface with Li-ion, 3.3V, and 5V systems without level-shifting. |
| Input Offset Voltage | 200µV max at +25°C - contributes <0.5 LSB error when buffering a 12-bit ADC with 4.096V reference. |
| Gain-Bandwidth Product | 500kHz - supports DC-coupled sensor amplification and low-frequency filtering up to ~50kHz closed-loop. |
| Quiescent Current | 150µA max per amplifier - allows 10+ years of operation on a CR2032 coin cell in duty-cycled portable instruments. |
| Output Voltage Swing | Within 50mV of rails (RL = 100kΩ) - preserves full dynamic range in 3V systems where headroom is critical. |
| Common-Mode Rejection | 90dB min - rejects noise from shared ground paths in mixed-signal PCBs with analog/digital sections. |
| Input Noise Density | 25nV/√Hz - suitable for µV-level thermocouple or strain gauge amplification without added gain-stage noise. |
Pinout & Package
MAX495ESA-T is supplied in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012AC compliant. Pin 1 is top-left corner (notch or dot indicator), pin numbering counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NULL (Offset Null) | Connect to one end of 10kΩ potentiometer wiper; used to trim input offset voltage ±6mV. |
| 2 | IN1− | Inverting input terminal of the single op-amp stage. |
| 3 | IN1+ | Noninverting input terminal - accepts signals from VEE −0.25V to VCC +0.25V. |
| 4 | VEE | Negative power supply pin - tied to GND in single-supply configurations. |
| 5 | NULL (Offset Null) | Connect to other end of 10kΩ potentiometer; completes external offset adjustment circuit. |
| 6 | OUT | Amplifier output - swings rail-to-rail into ≥100kΩ load; drives ≥1nF capacitively. |
| 7 | N.C. | No connect - not internally bonded; must remain unconnected on PCB. |
| 8 | VCC | Positive power supply pin - accepts +2.7V to +6V; requires 1µF + 0.1µF bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 0.25V beyond both supply rails - eliminates need for input biasing resistors in single-supply sensor interfaces. |
| No phase reversal on overdrive | Guaranteed non-latching behavior even when inputs exceed VEE/VCC - prevents system lockup in transient fault conditions. |
| Capacitive-load drive capability | Stable with >1000pF pure capacitive load - simplifies anti-alias filter design without isolation resistors. |
| Low input bias current | ±25nA typical - minimizes offset error from high-impedance sources (e.g., pH electrodes, piezoelectric sensors). |
| Unity-gain stable | Operates reliably as voltage follower without external compensation - reduces BOM count in buffer applications. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Amplifying microvolt-level ECG or EEG signals in handheld diagnostic devices powered by two AA cells. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with rail-to-rail input to maximize SNR at 3V supply. Use Value: 200µV offset and 25nV/√Hz noise ensure sub-LSB error when digitized by 12-bit SAR ADCs like MAX187. |
Use Scenario: Conditioning thermistor and humidity sensor outputs in field-deployed environmental monitors running on lithium-thionyl chloride batteries. IC Role / Device Role / Timing Role: Low-quiescent-current signal conditioner enabling multi-year operation in sleep/wake cycles. Use Value: 150µA supply current extends battery life beyond 10 years at 1-sample-per-minute duty cycle. |
| Low-Voltage Industrial I/O Modules | Single-Supply ADC Driver Circuits |
Use Scenario: Buffering 4–20mA loop receiver outputs in DIN-rail mounted PLC analog input cards operating from 3.3V logic rails. IC Role / Device Role / Timing Role: Rail-to-rail output driver ensuring full-scale swing into ADC reference buffers without headroom loss. Use Value: Output swing within 50mV of rails preserves >98% dynamic range in 3.3V systems, reducing quantization error. |
Use Scenario: Driving the analog input of MAX187 12-bit ADC in a compact 5V data-acquisition board. IC Role / Device Role / Timing Role: Gain-of-two buffer with offset trimming to match ADC's 4.096V internal reference. Use Value: Trimmed offset ensures <0.5 LSB contribution to total error - meets metrology-grade accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461CDR | Higher quiescent current (550µA), lower GBW (6.4MHz), no offset-null pins. | Lacks external offset trimming; unsuitable where <200µV offset is mandatory without calibration. | Preferred when higher speed and rail-to-rail I/O are needed, but offset trimming is unnecessary. |
| MCP6001T-E/OT | Lower quiescent current (100µA), lower GBW (1MHz), no offset-null pins, different pinout (SOT-23-5). | Not pin-compatible; requires PCB redesign; lacks null capability for precision trimming. | Best for new designs prioritizing ultra-low power and cost, where offset is managed digitally or via calibration. |
Compared with TLV2461CDR and MCP6001T-E/OT, the MAX495ESA-T uniquely offers factory-trimmable offset in an SO-8 package with proven 1nF capacitive-load stability - making it irreplaceable in legacy medical and test equipment requiring hardware-level offset correction without firmware intervention.
Availability
MAX495ESA-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and low-voltage industrial I/O modules requiring stable component supply during extended product lifecycles and obsolescence transitions.
Supply support for MAX495ESA-T 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 MAX495 belongs to Maxim's micropower rail-to-rail op amp family designed specifically for precision, low-voltage signal conditioning in space- and energy-constrained portable and battery-operated systems.
FAQ
Is MAX495ESA-T recommended for new designs?
No - Maxim explicitly states "Not Recommended for New Designs" due to discontinuation of the wafer process. The MAX495ESA-T remains available for legacy support, repair, and continuity programs, but new designs should evaluate alternatives like MCP6001 or TLV2461. Aetrix maintains inventory and provides obsolescence mitigation guidance for MAX495ESA-T users.
What is the operating temperature range of MAX495ESA-T?
The MAX495ESA-T is rated for −40°C to +85°C ambient operation (industrial grade). Electrical specifications including input offset voltage (±950µV max), supply current (185µA typ), and CMRR (84dB min) are guaranteed across this full range - critical for outdoor or factory-floor deployments.
Does MAX495ESA-T support offset voltage trimming?
Yes - the MAX495ESA-T provides dedicated NULL pins (1 and 5) for external offset trimming using a 10kΩ potentiometer (wiper to VEE). This allows ±6mV adjustment, reducing initial offset from 200µV to near-zero. Neither MAX492 nor MAX494 offer this feature, making MAX495ESA-T unique in the family for precision calibration.
Can MAX495ESA-T drive large capacitive loads stably?
Yes - the MAX495ESA-T is characterized to drive >1000pF pure capacitive loads without oscillation, even in unity-gain follower configuration. Stability is maintained up to 400pF when sourcing ~100µA; performance improves when sinking current or using isolation resistors - a key advantage over many CMOS rail-to-rail op amps.
What package type is used for MAX495ESA-T?
The MAX495ESA-T uses an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm lead pitch, compliant with JEDEC MS-012AC. It is distinct from the µMAX variant (MAX495µMAX) and DIP versions - the ESA suffix confirms the SO package, essential for correct footprint selection and thermal design.
MAX495ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX495ESA-T FAQ
1.How can I place an order for MAX495ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX495ESA-T 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 MAX495ESA-T reliable?
The price and inventory of MAX495ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX495ESA-T is usually 5 days.
3.What payment methods are accepted for MAX495ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX495ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX495ESA-T?
MAX495ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX495ESA-T 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 MAX495ESA-T?
For technical support, including MAX495ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX495ESA-T requirements.
6.How does Aetrix verify that MAX495ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX495ESA-T 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 MAX495ESA-T meets industry standards.
7.What is the process for return or replacement of MAX495ESA-T?
All MAX495ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX495ESA-T, 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 MAX495ESA-T part is unused and in its original packaging.
Return procedure for MAX495ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX495ESA-T 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…
