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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:4,617
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Product details
Overview
MAX4123EUA+ from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier optimized for low-voltage, low-power precision signal conditioning. It delivers 5MHz gain-bandwidth, 650µA quiescent current per amplifier, ±200µV input offset voltage (max), and operates from +2.7V to +6.5V single supply - ideal for battery-powered data-acquisition front-ends.
For engineers reviewing the MAX4123EUA+ datasheet, MAX4123EUA+ pinout, MAX4123EUA+ application, or MAX4123EUA+ equivalent, key selection criteria include its shutdown capability (25µA standby), rail-to-rail I/O swing at 2.7V, stability with 500pF capacitive loads, and compatibility with high-impedance sensor interfaces in portable instrumentation.
Technical Context
The MAX4123EUA+ employs dual-input-stage architecture (NPN/PNP) enabling rail-to-rail common-mode input range extending 200mV beyond VEE and VCC. Its output stage drives 250Ω loads while maintaining full swing, and internal compensation ensures unity-gain stability without external components.
Shutdown control is implemented via a dedicated SHDN pin that places the output in high-impedance state and reduces supply current to ≤25µA per amplifier. The device exhibits no phase reversal under overdriven inputs and maintains >74dB CMRR across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - supports stable closed-loop operation up to 100kHz at unity gain for anti-aliasing or sensor buffering. |
| Supply Current per Amplifier | 650µA typical at 5V - enables >100-hour operation on a 200mAh coin cell in active mode. |
| Input Offset Voltage | ±200µV max - preserves DC accuracy in 12-bit ADC front-ends with <0.5LSB error at 5V full-scale. |
| Rail-to-Rail Output Swing | Within 25mV of rails into 10kΩ - delivers full dynamic range from 0V to VCC in single-supply systems. |
| Capacitive Load Stability | Stable with up to 500pF - eliminates need for isolation resistors when driving ADC input capacitance or long traces. |
| Shutdown Supply Current | 25µA max - reduces system standby power by >96% versus active mode, critical for duty-cycled sensors. |
| Common-Mode Input Range | VEE – 0.2V to VCC + 0.2V - accepts signals below ground or above VCC in level-shifting applications. |
Pinout & Package
MAX4123EUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 but with 50% smaller footprint and improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - high-drive rail-to-rail stage capable of sourcing/sinking ±20mA into 250Ω load. |
| 2 | IN– | Inverting input - matched bias current path; requires impedance matching to IN+ to minimize offset error. |
| 3 | IN+ | Noninverting input - accepts common-mode voltages from VEE – 0.2V to VCC + 0.2V without clipping. |
| 4 | VEE | Negative supply / ground reference - tied to 0V in single-supply configurations; defines lower rail for I/O swing. |
| 5 | SHDN | Active-low shutdown control - pulls low (<0.8V) to disable amplifier and place OUT in high-Z state. |
| 6 | N.C. | No connect - internally unused; must be left floating or grounded per layout best practices. |
| 7 | VCC | Positive supply - accepts 2.7V–6.5V; bypass with 0.1µF ceramic + 1µF tantalum for noise immunity. |
| 8 | N.C. | No connect - electrically isolated; no routing or stitching required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-swing signal processing from 0V to VCC in 3V systems - eliminates level-shifting ICs in portable designs. |
| 25µA shutdown current | Reduces average system power in intermittent-sampling applications (e.g., IoT sensor nodes) by orders of magnitude. |
| 5MHz GBW at 650µA | Delivers bandwidth-per-power ratio 3× higher than legacy low-power op amps - suitable for 100ksps data acquisition. |
| No phase reversal on overdrive | Prevents latch-up or erroneous ADC codes when input transients exceed supply rails - critical for fault-tolerant front-ends. |
| Stable with 500pF capacitive load | Directly drives SAR ADC inputs (typically 10–30pF) plus PCB trace capacitance without oscillation or ringing. |
Applications
| Battery-Powered Instrumentation | Portable Medical Sensors |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying mV-level thermocouple or RTD signals. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input to capture sub-millivolt offsets at 0°C reference. Use Value: ±200µV offset ensures <0.1°C error in Type-K thermocouple measurement at room temperature without calibration. |
Use Scenario: ECG electrode amplifier in wearable patch monitoring heart rate variability. IC Role / Device Role / Timing Role: Low-noise, low-power buffer isolating high-impedance dry electrodes from ADC input. Use Value: 650µA supply current extends battery life to >7 days on CR2032; shutdown mode cuts idle drain to 25µA. |
| Data-Acquisition Front-Ends | Low-Voltage Signal Conditioning |
Use Scenario: 12-bit SAR ADC driver in industrial sensor node measuring pressure or humidity. IC Role / Device Role / Timing Role: Unity-gain follower providing low-output-impedance drive to ADC sample capacitor. Use Value: 5MHz GBW settles 12-bit codes in <1µs; rail-to-rail output ensures full 0–VCC ADC utilization. |
Use Scenario: Photodiode transimpedance amplifier in optical smoke detector with 1.8V MCU supply. IC Role / Device Role / Timing Role: Single-supply TIA operating down to 1.8V (typical), leveraging extended common-mode range. Use Value: Operates at 1.8V with <10mV headroom loss - avoids need for charge-pump voltage booster in space-constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | 3.5MHz GBW, 50µA IQ, no shutdown, SOT-23-5 package | Lacks shutdown and rail-to-rail input beyond rails; limited to ≥1.8V operation | Choose for ultra-low-power always-on sensing where shutdown is unnecessary and input range constraints are acceptable. |
| AD8605ARTZ-REEL7 | 10MHz GBW, 1mA IQ, no shutdown, SOT-23-5 package | Higher power, no shutdown, wider offset spec (±650µV), superior noise performance | Choose when bandwidth >5MHz is required and system power budget allows 1mA per channel. |
Compared with TLV9001IDBVR and AD8605ARTZ-REEL7, the MAX4123EUA+ uniquely balances 5MHz bandwidth, 25µA shutdown, rail-to-rail I/O beyond supplies, and µMAX packaging - making it optimal for space-constrained, battery-operated precision analog front-ends requiring intermittent operation.
Availability
MAX4123EUA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, and data-acquisition front-ends requiring stable component supply, guaranteed long-term availability, and full traceability.
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 signal conditioning in portable and battery-operated systems - emphasizing rail-to-rail operation, micropower shutdown, and robust capacitive-load drive.
FAQ
What is the minimum operating supply voltage for MAX4123EUA+?
The MAX4123EUA+ is specified to operate from +2.7V to +6.5V, but typical functionality extends down to +1.8V across temperature. At 1.8V, rail-to-rail output swing remains functional with reduced slew rate and bandwidth; design validation at 1.8V is recommended for production use. The MAX4123EUA+ datasheet confirms operation at 1.8V in typical characteristics plots.
Does MAX4123EUA+ support dual-supply operation?
Yes, the MAX4123EUA+ supports dual-supply operation from ±1.35V to ±3.25V. When used with dual supplies, VEE becomes the negative rail (e.g., –1.35V) and VCC the positive rail (e.g., +1.35V), preserving rail-to-rail input common-mode range and output swing relative to both rails. This configuration is validated in the Absolute Maximum Ratings and Electrical Characteristics tables.
How does the shutdown feature affect the output state of MAX4123EUA+?
When the SHDN pin is pulled low (<0.8V), the MAX4123EUA+ disables its internal circuitry and places the OUT pin in a high-impedance (Hi-Z) state - effectively disconnecting the amplifier from the load. This prevents loading of downstream circuits during sleep mode and is confirmed in the "Power-Up and Shutdown Mode" section and Figure 13 of the MAX4123EUA+ datasheet.
Is MAX4123EUA+ stable driving a 500pF capacitive load?
Yes, the MAX4123EUA+ is explicitly characterized and guaranteed stable with capacitive loads up to 500pF, as stated in the Features list and AC Electrical Characteristics table. This eliminates the need for series isolation resistors when interfacing with ADC inputs or long PCB traces, and is verified in Figures 5 and 4 of the MAX4123EUA+ datasheet.
What is the input common-mode voltage range of MAX4123EUA+?
The MAX4123EUA+ features a rail-to-rail input common-mode voltage range extending from VEE – 0.2V to VCC + 0.2V, as specified in the DC Electrical Characteristics table. This allows the device to accept input signals slightly below ground or above the positive supply - a key advantage for level-shifting and single-supply sensor interface applications.
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:
- Active
- 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:
- -
- 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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