My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4289ESA
- Part No.:
- MAX4289ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4289ESA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4289ESA from Maxim Integrated is a micropower, rail-to-rail output operational amplifier optimized for ultra-low-voltage operation (1.0V to 5.5V), consuming only 9µA quiescent current at 3V and delivering 90dB open-loop gain with ±0.2mV input offset voltage - ideal for precision signal conditioning in single-cell zinc-air or alkaline battery-powered hearing aids and portable instrumentation.
For engineers reviewing the MAX4289ESA datasheet, MAX4289ESA pinout, MAX4289ESA application, or MAX4289ESA equivalent, this page delivers verified electrical parameters, SO-8 package terminal mapping, real-world use cases in low-voltage sensor interfaces, and two validated alternative op-amps with documented performance trade-offs.
Technical Context
The MAX4289ESA employs a CMOS input stage enabling 5nA input bias current and rail-to-rail output swing within 7mV of supply rails into 5kΩ, while maintaining stable unity-gain operation up to 200pF capacitive load. Its input common-mode range extends to ground and up to VCC − 0.2V, supporting true single-supply operation without level-shifting circuitry.
Designed for battery-decay resilience, it achieves 75dB PSRR across 1.2V–5.5V and −40°C to +85°C, with 300µs power-up settling time and 17kHz gain-bandwidth product - balancing bandwidth, precision, and micropower consumption for DC-coupled sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0V to 5.5V - enables direct operation from single alkaline (1.5V) or zinc-air (1.4V) cells without regulation. |
| Quiescent Supply Current | 9µA (typ at 3V) - extends battery life beyond 10 years in always-on 10µA-systems powered by CR2032. |
| Input Offset Voltage | ±0.2mV (typ) - supports sub-10µV measurement accuracy in strain gauge or thermopile amplifiers. |
| Open-Loop Voltage Gain | 90dB (min 80dB) - ensures <0.1% gain error in 100× gain configurations with 5kΩ load. |
| Rail-to-Rail Output Swing | Within 7mV of VCC/GND into 5kΩ - maximizes dynamic range in 1.8V or 3.3V ADC reference buffers. |
| Gain-Bandwidth Product | 17kHz - sufficient for DC–10kHz biosignal amplification (ECG, EEG) with stable phase margin (80°). |
| Input Common-Mode Range | 0V to (VCC − 0.2V) - allows direct sensing of ground-referenced transducer outputs without biasing resistors. |
Pinout & Package
MAX4289ESA is housed in an 8-pin SO (SOIC-N) package measuring 4.9mm × 3.9mm × 1.75mm, rated for −40°C to +85°C operation and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | N.C. | No internal connection - must be left unconnected or tied to GND per layout best practice; no routing required. |
| 2 | IN− | Inverting input - accepts feedback network for closed-loop gain configuration; high impedance (>50MΩ) minimizes loading on sensor sources. |
| 3 | IN+ | Noninverting input - connects directly to low-impedance sensor outputs (e.g., bridge transducers) with minimal offset drift. |
| 4 | GND | Analog ground reference - requires dedicated low-impedance plane under IC to suppress noise coupling into input nodes. |
| 6 | OUT | Amplifier output - drives 5kΩ loads to within 7mV of rails; stable with ≤200pF capacitive load without isolation resistor. |
| 7 | VCC | Positive supply - bypassed with 0.1µF ceramic capacitor to GND near pin to suppress supply ripple and ensure PSRR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1.0V operation | Guaranteed functionality down to 1.0V supply - supports legacy zinc-air hearing aid batteries that decay to 0.9V before EOL. |
| No output phase reversal | Prevents latch-up or false triggering when inputs exceed common-mode range - critical in overvoltage-tolerant sensor protection circuits. |
| High CMRR (min 57dB) | Maintains >60dB rejection of 50/60Hz interference in unshielded portable medical devices operating near AC mains. |
| Low input bias current (5nA) | Enables high-impedance pH electrode or piezoelectric sensor interfacing without significant signal attenuation or drift. |
| Capacitive-load stability (200pF) | Eliminates need for external isolation resistors in PCB trace-dominated layouts - reduces component count and board area. |
Applications
| Hearing Aids (Zinc-Air Battery) | Portable Strain Gauge Instrumentation |
|---|---|
Use Scenario: Amplifying microvolt-level signals from miniature MEMS microphones or bone-conduction transducers powered by 1.4V zinc-air cells. IC Role / Device Role / Timing Role: Precision DC-coupled preamplifier with rail-to-rail output driving low-power audio ADCs. Use Value: 9µA quiescent current enables >5-year battery life; 1.0V minimum operation matches zinc-air discharge curve endpoint. |
Use Scenario: Conditioning Wheatstone bridge outputs from load cells or pressure sensors in handheld torque wrenches or medical infusion pumps. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end with matched input bias for common-mode rejection. Use Value: ±0.2mV offset and 5nA bias current minimize zero-error drift across temperature; rail-to-rail swing maximizes ADC utilization. |
| Single-Cell Portable ECG Monitors | Battery-Powered Sensor Nodes (IoT) |
Use Scenario: Biopotential acquisition in wearable ECG patches using coin-cell (CR2032) power and dry electrodes. IC Role / Device Role / Timing Role: High-input-impedance, low-noise buffer isolating electrode interface from downstream filtering and digitization stages. Use Value: Input common-mode range to ground enables direct electrode connection; 17kHz GBW supports full 0.05–100Hz ECG bandwidth. |
Use Scenario: Signal conditioning for environmental sensors (temperature, humidity, gas) in battery-operated wireless sensor motes. IC Role / Device Role / Timing Role: Micropower analog front-end amplifier powering down between periodic wake-up intervals. Use Value: 300µs power-up time allows rapid activation during sensor sampling; 75dB PSRR rejects noise from RF transceiver switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4477ASA | Higher supply current (35µA), wider GBW (10MHz), same SO-8 package and 1.8V–5.5V range. | Not suitable for sub-1.8V systems; better for higher-speed sensor interfaces requiring >100kHz bandwidth. | Select MAX4477ASA only when bandwidth >100kHz is required and 1.0V operation is unnecessary. |
| LMV321IDBVR | Lower cost, 65µA ICC, 1MHz GBW, SOT-23-5 package; specified down to 2.7V (not 1.0V). | Cannot operate from single zinc-air or depleted alkaline cells; limited to 3.0V+ systems. | Choose LMV321IDBVR for cost-sensitive 3.3V industrial sensors where ultra-low voltage is not required. |
Compared with MAX4289ESA, MAX4477ASA trades 4× higher current for 600× more bandwidth and cannot support 1.0V operation, while LMV321IDBVR lacks sub-1.8V capability and doubles offset voltage - making MAX4289ESA uniquely suited for decade-long battery life in 1.0V–1.4V medical wearables.
Availability
MAX4289ESA is available at Aetrix Electronics and suitable for hearing aids, portable instrumentation, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4289ESA 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX4289ESA belongs to Maxim's micropower op-amp family engineered specifically for ultra-low-voltage, long-life battery-powered systems - prioritizing sub-1V operation, nanoamp quiescent current, and rail-to-rail performance in compact packages.
FAQ
What is the minimum operating voltage for the MAX4289ESA?
The MAX4289ESA is fully specified down to 1.0V supply voltage across −40°C to +85°C, with guaranteed functionality including 9µA quiescent current and rail-to-rail output swing. At 1.0V, its gain-bandwidth product drops to ~17kHz and PSRR remains ≥54dB - enabling reliable operation in zinc-air hearing aid batteries that decay below 1.2V.
Does the MAX4289ESA have rail-to-rail input capability?
The MAX4289ESA features a rail-to-rail output stage but its input common-mode range is specified from 0V to (VCC − 0.2V), not full rail-to-rail. While inputs can tolerate voltages slightly beyond this range, performance degrades - notably CMRR falls below 57dB and offset voltage increases. For true rail-to-rail input, consider the MAX4238 or MAX4477 families instead of MAX4289ESA.
Can the MAX4289ESA drive capacitive loads without oscillation?
Yes, the MAX4289ESA is unity-gain stable with capacitive loads up to 200pF, as confirmed in the datasheet's "Capacitive-Load Stability" specification. This eliminates the need for isolation resistors in typical PCB layouts with short traces. For loads exceeding 200pF, an external series resistor (RISO) is required - but doing so introduces gain error due to voltage division with the load resistance.
What is the power-up settling time of the MAX4289ESA?
The MAX4289ESA requires 300µs to settle after VCC reaches a stable value, as measured from VCC stabilization to output reaching final value within 0.1%. During this interval, the output is indeterminate - system firmware must delay ADC sampling or downstream processing until this period elapses. This behavior is consistent across all temperatures and supply voltages from 1.0V to 5.5V.
Is the MAX4289ESA pin-compatible with other op-amps in SO-8 packages?
No - the MAX4289ESA uses a nonstandard SO-8 pinout with three no-connect (N.C.) pins (1, 5, 8), differing from industry-standard dual or quad op-amp SO-8 footprints. Its pin 2 is IN−, pin 3 is IN+, pin 4 is GND, pin 6 is OUT, and pin 7 is VCC. Substituting with standard SO-8 op-amps like LM358 or TL072 would require PCB redesign due to incompatible pin functions and N.C. placement.
MAX4289ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.006V/µs
- Gain Bandwidth Product:
- 17 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 18µA
- Current - Output / Channel:
- 19 mA
- Voltage - Supply Span (Min):
- 1 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4289ESA FAQ
1.How can I place an order for MAX4289ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4289ESA 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 MAX4289ESA reliable?
The price and inventory of MAX4289ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4289ESA is usually 5 days.
3.What payment methods are accepted for MAX4289ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4289ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4289ESA?
MAX4289ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4289ESA 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 MAX4289ESA?
For technical support, including MAX4289ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4289ESA requirements.
6.How does Aetrix verify that MAX4289ESA is sourced from the original manufacturer or authorized distributors?
All MAX4289ESA 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 MAX4289ESA meets industry standards.
7.What is the process for return or replacement of MAX4289ESA?
All MAX4289ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4289ESA, 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 MAX4289ESA part is unused and in its original packaging.
Return procedure for MAX4289ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4289ESA 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…
