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Analog Devices Inc./Maxim Integrated MAX4127ESD+
- Part No.:
- MAX4127ESD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4127ESD+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,487
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Product details
Overview
The MAX4127ESD+ from Maxim Integrated is a dual, rail-to-rail input/output operational amplifier optimized for precision low-voltage signal conditioning in single-supply systems. It delivers 5MHz gain-bandwidth product, 650µA quiescent current per amplifier, ±200µV input offset voltage (max), and full rail-to-rail output swing into 250Ω loads - enabling high-fidelity analog front-ends in battery-powered data-acquisition systems.
For engineers reviewing the MAX4127ESD+ datasheet, MAX4127ESD+ pinout, MAX4127ESD+ application, or MAX4127ESD+ equivalent, this page provides verified electrical specifications, dual-amplifier shutdown behavior, SO-14 package terminal mapping, real-world capacitive-load stability (up to 500pF), and validated alternatives for low-power, rail-to-rail I/O op amp selection.
Technical Context
The MAX4127ESD+ implements a composite NPN/PNP rail-to-rail input stage that extends common-mode range 250mV beyond VEE and VCC, with seamless transition near VCC/2 to minimize CMRR degradation. Its unity-gain-stable architecture supports stable operation at AV = 1 with no external compensation required.
Each amplifier features independent shutdown control (SHDN1/SHDN2), reducing supply current to ≤25µA per channel while placing outputs in high-impedance state. The device drives 250Ω loads with <150mV headroom to either rail at VCC = 5V and remains stable with 500pF capacitive loads without isolation resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop operation up to ~100kHz at AV = 50 for sensor signal amplification |
| Input Offset Voltage | ±200µV max - ensures ≤0.4mV error in 2V full-scale 12-bit ADC interfaces |
| Supply Current per Amp | 650µA typical at VCC = 5V - allows dual-channel operation under 1.3mA total for ultra-low-power portable designs |
| Rail-to-Rail Output Swing | Within 150mV of VEE/VCC into 250Ω - delivers >95% of 3.3V supply range for direct microcontroller ADC input drive |
| Shutdown Current | 25µA per amplifier - reduces system standby power by >95% when amplifiers are inactive |
| Capacitive Load Stability | Stable with up to 500pF - eliminates need for output isolation resistors in anti-aliasing filter or cable-drive applications |
| Common-Mode Input Range | VEE − 0.25V to VCC + 0.25V - accepts signals below ground or above supply in single-supply configurations |
Pinout & Package
The MAX4127ESD+ is housed in a 14-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.27mm pitch). Pin 1 is marked with a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | OUT1, OUT2 | Dual independent amplifier outputs - high-impedance during shutdown, rail-to-rail swing capability |
| 2, 6 | IN1−, IN2− | Inverting inputs - matched to noninverting inputs for precision differential gain configuration |
| 3, 5 | IN1+, IN2+ | Noninverting inputs - support rail-to-rail common-mode range extending 250mV beyond supplies |
| 4 | VEE | Negative supply / ground reference - tied to 0V in single-supply operation |
| 8 | VCC | Positive supply - operates from +2.7V to +6.5V; bypass with 0.1µF ceramic + 1µF bulk capacitor |
| 9, 13 | SHDN1, SHDN2 | Independent shutdown controls - logic-low (<0.8V) disables respective amplifier and forces output high-Z |
| 10, 12 | IN3+, IN4+ | No-connect (N.C.) - unused pins; must remain unconnected per datasheet |
| 11, 14 | N.C. | No-connect - electrically isolated; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 3.3V or lower single-supply systems without level-shifting circuitry |
| Independent dual shutdown | Per-amplifier enable/disable allows selective channel power gating in multi-sensor acquisition systems |
| 500pF capacitive load stability | Eliminates need for series output resistors in RC filters or long-trace interconnects, preserving bandwidth |
| No phase reversal on overdrive | Prevents latch-up or erroneous output states when inputs exceed common-mode range during transient events |
| Low input bias current mismatch | ±1nA max input offset current ensures <1µV error contribution from 10kΩ source impedances |
Applications
| Battery-Powered Data Logger | Portable Medical Sensor Interface |
|---|---|
Use Scenario: Continuous acquisition of thermistor, strain gauge, and ECG electrode signals in handheld diagnostic devices powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing gain, filtering, and rail-to-rail buffering before SAR ADC sampling. Use Value: 650µA per amplifier and 25µA shutdown current extend battery life >3× versus legacy op amps; rail-to-rail I/O maximizes ADC utilization without external biasing. |
Use Scenario: Front-end amplification of low-amplitude biopotential signals (e.g., EEG, EMG) in wearable health monitors with strict size and power constraints. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage with selectable shutdown for unused channels during sleep mode. Use Value: ±200µV offset and 5MHz GBW support 12-bit accuracy at 10kHz bandwidth; 500pF stability simplifies integration with shielded sensor cables. |
| Industrial 4–20mA Loop Receiver | Low-Voltage PLC Analog Input Module |
Use Scenario: Converting 4–20mA current loop signals to 0–3.3V voltage levels for microcontroller ADC interfacing in factory automation sensors. IC Role / Device Role / Timing Role: Transimpedance and level-shifting amplifier operating from 3.3V supply with rail-to-rail output compliance. Use Value: VEE-to-VCC +0.25V input range accepts loop voltage drops down to 0.5V; output swing to within 150mV of rails ensures full 0–3.3V span. |
Use Scenario: Signal conditioning for multiple RTD or thermocouple inputs in compact programmable logic controller (PLC) modules with 24V DC field power. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier with independent shutdown for channel multiplexing and power management. Use Value: Independent SHDN1/SHDN2 pins allow dynamic allocation of amplifiers across 4+ sensor inputs; SO-14 package fits high-density PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, rail-to-rail I/O op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4126ESA+ | No shutdown function; otherwise identical GBW, offset, and supply current specs | Suitable only where continuous operation is required; lacks power-gating capability | Select when shutdown is unnecessary and cost optimization is prioritized |
| AD8602ARZ | Lower 65µA quiescent current but 9.5MHz GBW; no rail-to-rail input (CMVR = VEE to VCC − 1.2V) | Better for ultra-low-power always-on monitoring; unsuitable for true single-supply sensor inputs near ground | Choose for sub-100µA systems with mid-supply input signals and higher bandwidth needs |
Compared with MAX4126ESA+, the MAX4127ESD+ adds independent shutdown for dynamic power control; compared with AD8602ARZ, it provides full rail-to-rail input operation essential for ground-referenced sensor interfaces, at the cost of higher quiescent current.
Availability
The MAX4127ESD+ is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical devices, and industrial 4–20mA loop receivers requiring stable component supply across extended production lifecycles.
Supply support for MAX4127ESD+ 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 design house specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX4122–MAX4129 family was engineered for precision, low-voltage, single-supply signal conditioning - targeting data-acquisition systems where rail-to-rail I/O, low power, and small-package integration are critical.
FAQ
What is the maximum capacitive load the MAX4127ESD+ can drive without oscillation?
The MAX4127ESD+ is specified stable with up to 500pF capacitive loads across its full operating temperature range (−40°C to +85°C) and supply range (+2.7V to +6.5V). This eliminates the need for series output isolation resistors in most anti-aliasing filter or cable-drive applications, preserving signal integrity and bandwidth. Stability is confirmed in Figures 4–8 of the official datasheet.
Does the MAX4127ESD+ support true rail-to-rail input operation?
Yes, the MAX4127ESD+ features a composite NPN/PNP input stage enabling a common-mode input voltage range from VEE − 0.25V to VCC + 0.25V - exceeding both supply rails by 250mV. This allows direct interfacing with sensors whose outputs swing to ground or near VCC, such as thermistors or bridge transducers, without external level-shifting circuitry.
How does the shutdown function operate on the MAX4127ESD+?
The MAX4127ESD+ provides two independent shutdown pins: SHDN1 (pin 9) controls amplifier 1, and SHDN2 (pin 13) controls amplifier 2. Pulling either pin below 0.8V disables the corresponding amplifier, reducing its supply current to ≤25µA and placing its output in a high-impedance state. Pins left floating or pulled ≥2V enable normal operation.
What is the typical input offset voltage of the MAX4127ESD+ and how does it affect precision applications?
The MAX4127ESD+ has a maximum input offset voltage of ±200µV at TA = +25°C and VCC = 5V. At room temperature, typical offset is ±20µV. In a 2V full-scale 12-bit system (LSB = 488µV), this contributes <0.5 LSB error - making it suitable for precision sensor interfaces where calibration is performed at system level rather than requiring zero-drift architecture.
Can the MAX4127ESD+ operate from a 3.3V supply in battery-powered applications?
Yes, the MAX4127ESD+ is fully specified for operation from +2.7V to +6.5V single supply. At VCC = 3.3V, it maintains rail-to-rail input common-mode range (−0.25V to +3.55V), rail-to-rail output swing (within 150mV of rails into 250Ω), and 5MHz gain-bandwidth product - making it ideal for 3.3V microcontroller-based data loggers and portable instrumentation where supply headroom is constrained.
MAX4127ESD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 725µA (x2 Channels)
- 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:
- 14-SOIC
MAX4127ESD+ FAQ
1.How can I place an order for MAX4127ESD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4127ESD+ 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 MAX4127ESD+ reliable?
The price and inventory of MAX4127ESD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4127ESD+ is usually 5 days.
3.What payment methods are accepted for MAX4127ESD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4127ESD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4127ESD+?
MAX4127ESD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4127ESD+ 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 MAX4127ESD+?
For technical support, including MAX4127ESD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4127ESD+ requirements.
6.How does Aetrix verify that MAX4127ESD+ is sourced from the original manufacturer or authorized distributors?
All MAX4127ESD+ 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 MAX4127ESD+ meets industry standards.
7.What is the process for return or replacement of MAX4127ESD+?
All MAX4127ESD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4127ESD+, 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 MAX4127ESD+ part is unused and in its original packaging.
Return procedure for MAX4127ESD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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