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Analog Devices Inc./Maxim Integrated MAX4123EUA
- Part No.:
- MAX4123EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4123EUA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,032
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Product details
Overview
MAX4123EUA from Maxim Integrated is a single, rail-to-rail input/output operational amplifier optimized for low-voltage, low-power precision signal conditioning. It features 5MHz gain-bandwidth product, 650µA quiescent current per amplifier, ±0.35mV input offset voltage (typ), shutdown mode reducing supply current to 25µA, and operates from +2.7V to +6.5V single supply. It is used in battery-powered data-acquisition front-ends where rail-to-rail swing and low power are critical.
For engineers reviewing the MAX4123EUA datasheet, MAX4123EUA pinout, MAX4123EUA application, or MAX4123EUA equivalent, key selection criteria include its 5MHz bandwidth with unity-gain stability, 25µA shutdown current, rail-to-rail I/O capability down to 2.7V, ability to drive 250Ω loads, and µMAX-8 package compatibility with space-constrained portable designs.
Technical Context
The MAX4123EUA employs a dual-input-stage architecture-NPN and PNP differential pairs-enabling rail-to-rail common-mode input range extending 200mV beyond VEE and VCC. Its output stage delivers true rail-to-rail swing with <150mV headroom at full load.
It integrates a dedicated SHDN pin that places the output in high-impedance state and reduces supply current to 25µA per amplifier when asserted low, supporting dynamic power management in portable systems without external switching circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - ensures stable unity-gain operation and supports >100kHz closed-loop bandwidth in sensor interface circuits. |
| Supply Current (Active) | 650µA per amplifier - enables multi-channel, always-on sensing in energy-harvesting or coin-cell-powered devices. |
| Supply Current (Shutdown) | 25µA per amplifier - allows microcontroller-controlled power gating with negligible standby drain. |
| Input Offset Voltage | ±0.35mV (max at -40°C to +85°C) - supports 12-bit+ accuracy in DC-coupled transducer amplification without trimming. |
| Rail-to-Rail I/O | Input CMVR extends 200mV beyond rails; output swings within 150mV of rails - maximizes dynamic range in 3.3V or lower single-supply systems. |
| Capacitive Load Drive | Stable with up to 500pF - eliminates need for isolation resistors when driving ADC input capacitors or long PCB traces. |
| Operating Supply Range | +2.7V to +6.5V single supply - supports direct interfacing with Li-ion, Li-Po, or two-cell alkaline batteries without regulation. |
Pinout & Package
The MAX4123EUA is housed in an 8-pin µMAX package (pin-compatible with SO-8 but 36% smaller footprint), specified for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; high-impedance during shutdown. |
| 2 (IN–) | Inverting input | Differential node accepting feedback network; protected by 1kΩ series resistors and back-to-back diodes. |
| 3 (IN+) | Noninverting input | Reference input for sensor biasing or signal routing; same ESD protection as IN–. |
| 4 (VEE) | Negative supply / ground | Return path for single-supply operation; substrate tied to this pin. |
| 5 (N.C.) | No connect | Internally unused; must remain unconnected per datasheet. |
| 6 (SHDN) | Shutdown control input | Active-low logic input; <0.8V disables amplifier and forces output high-Z; ≥2V or open enables operation. |
| 7 (VCC) | Positive supply | Accepts +2.7V to +6.5V; requires local 0.1µF ceramic + 1µF bulk bypassing. |
| 8 (N.C.) | No connect | Internally unused; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 200mV beyond VEE and VCC - enables direct interfacing with sensors operating near supply rails (e.g., bridge outputs at 0V or VCC). |
| Shutdown mode with high-Z output | Reduces current to 25µA and isolates output - permits multiplexed analog front-ends without signal contention or loading. |
| Unity-gain stable | Guaranteed stable at AV = 1 - simplifies design of voltage followers, active filters, and buffer stages without compensation components. |
| 250Ω load drive capability | Delivers full swing into 250Ω - supports direct driving of 50Ω transmission lines or low-impedance ADC inputs with minimal gain error. |
| No phase reversal on overdrive | Prevents output latch-up when inputs exceed common-mode range - improves robustness in noisy industrial environments or fault conditions. |
Applications
| Battery-Powered Data Acquisition | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous monitoring of thermistor, RTD, or strain gauge signals in handheld diagnostic tools powered by CR2032 or AAA batteries. IC Role / Device Role / Timing Role: Precision signal-conditioning amplifier providing gain, offset correction, and rail-to-rail buffering before 12-bit SAR ADC sampling. Use Value: 650µA quiescent current and 25µA shutdown extend battery life to >1 year in intermittent-read modes; rail-to-rail I/O preserves full sensor dynamic range at 3.0V supply. | Use Scenario: Front-end amplification for ECG/EEG electrode interfaces in wearable biosensors with strict size and power constraints. IC Role / Device Role / Timing Role: Low-noise, low-offset instrumentation amplifier stage rejecting common-mode interference while maintaining DC accuracy. Use Value: ±0.35mV max offset ensures sub-µV baseline stability; 5MHz GBW supports fast transient response to cardiac events without slew limiting. |
| Low-Voltage Industrial Transmitters | Energy-Harvesting Sensor Nodes |
Use Scenario: 4–20mA loop transmitter using ultra-low-voltage microcontrollers (e.g., MSP430FR) operating from 2.7V–3.6V supplies. IC Role / Device Role / Timing Role: Output driver and level-shifter converting DAC output to loop current with precise zero/scale calibration. Use Value: Rail-to-rail output swing ensures full 0–3.3V DAC range maps linearly to 4–20mA; 250Ω drive capability sustains loop compliance under worst-case load. | Use Scenario: Signal conditioning in vibration or temperature nodes powered by piezoelectric or thermal harvesters delivering <100µW average power. IC Role / Device Role / Timing Role: Wake-on-event amplifier enabling microcontroller sleep until threshold-crossing detection triggers measurement burst. Use Value: 25µA shutdown current minimizes quiescent drain; fast turn-on (<1µs) ensures no signal loss during wake-up; 5MHz bandwidth captures high-frequency transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4125EUA | 25MHz GBW, decompensated (stable only at G ≥10), same µMAX-8 package and shutdown function | Suitable for higher-gain, higher-speed applications (e.g., active filters, non-inverting amps with G=10+); not unity-gain stable | Select MAX4125EUA when closed-loop gain ≥10 is acceptable and bandwidth >5MHz is required; avoid for G=1 buffers. |
| OPA333AIDBVR | 350nA quiescent current, 350kHz GBW, zero-drift architecture, SOT23-5 package, no shutdown | Better DC precision (0.1µV/°C drift) but much lower speed; lacks shutdown and rail-to-rail output swing at light loads | Choose OPA333AIDBVR for ultra-low-drift, micropower DC applications where speed <100kHz suffices and shutdown is unnecessary. |
Compared with MAX4125EUA and OPA333AIDBVR, the MAX4123EUA uniquely balances 5MHz bandwidth, unity-gain stability, 25µA shutdown, and rail-to-rail I/O in a compact µMAX-8 package-making it optimal for portable, battery-sensitive, medium-speed precision signal chains requiring flexible power management.
Availability
MAX4123EUA is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical sensors, and low-voltage industrial transmitters requiring stable component supply across extended temperature ranges (-40°C to +85°C) and long production lifecycles.
Supply support for MAX4123EUA 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 MAX4122–MAX4129 family was engineered specifically for low-voltage, low-power, rail-to-rail signal conditioning in portable and energy-constrained systems-prioritizing bandwidth-efficiency, supply flexibility, and integration of power-saving features like shutdown.
FAQ
What is the maximum capacitive load the MAX4123EUA can drive stably?
The MAX4123EUA is specified stable with capacitive loads up to 500pF without external compensation. This allows direct connection to typical ADC input capacitors (e.g., 10–100pF) and moderate-length PCB traces without requiring isolation resistors. Stability is verified per Figure 4 in the datasheet, covering the full operating temperature and supply range.
Does the MAX4123EUA support dual-supply operation?
Yes, the MAX4123EUA supports dual-supply operation from ±1.35V to ±3.25V. Its rail-to-rail input common-mode range extends 200mV beyond both rails, and output swing reaches within 150mV of each supply. This enables use in traditional bipolar signal chains while retaining low quiescent current (650µA) and shutdown capability (25µA).
What is the input offset voltage specification for MAX4123EUA over temperature?
The MAX4123EUA has a maximum input offset voltage of ±0.35mV over the full operating temperature range (-40°C to +85°C), with a typical value of ±0.20mV at +25°C. Its input offset voltage tempco is ±2µV/°C (max), ensuring predictable drift behavior in precision DC-coupled applications such as strain gauge or thermocouple amplifiers.
Can the MAX4123EUA operate below its minimum rated supply voltage of +2.7V?
While the absolute minimum specified supply is +2.7V, the MAX4123EUA typically operates down to +1.8V per Figure 25 in the datasheet. However, performance parameters-including bandwidth, output swing, and THD-are not guaranteed below +2.7V. For production designs requiring guaranteed specs, operation must remain within the rated +2.7V to +6.5V range.
How does the shutdown function affect the output impedance of MAX4123EUA?
When the SHDN pin is pulled low (<0.8V), the MAX4123EUA disables its output stage and places the OUT pin in a high-impedance (Hi-Z) state-effectively disconnecting it from the load. This prevents signal contention in multiplexed or shared-bus configurations and eliminates loading effects on downstream circuitry, while reducing total supply current to 25µA per amplifier.
MAX4123EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 725µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4123EUA FAQ
1.How can I place an order for MAX4123EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4123EUA 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 MAX4123EUA reliable?
The price and inventory of MAX4123EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4123EUA is usually 5 days.
3.What payment methods are accepted for MAX4123EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4123EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4123EUA?
MAX4123EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4123EUA 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 MAX4123EUA?
For technical support, including MAX4123EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4123EUA requirements.
6.How does Aetrix verify that MAX4123EUA is sourced from the original manufacturer or authorized distributors?
All MAX4123EUA 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 MAX4123EUA meets industry standards.
7.What is the process for return or replacement of MAX4123EUA?
All MAX4123EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4123EUA, 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 MAX4123EUA part is unused and in its original packaging.
Return procedure for MAX4123EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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