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Analog Devices Inc./Maxim Integrated MAX11201AEUB+
- Part No.:
- MAX11201AEUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX11201AEUB+.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,289
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Product details
Overview
MAX11201AEUB+ from Maxim Integrated is a 24-bit, single-channel, ultra-low-power delta-sigma ADC optimized for high-dynamic-range sensor measurement in 4–20mA industrial loops. It delivers 19.1-bit noise-free resolution at 120sps, <320µA total active current, and integrated 2.4576MHz internal oscillator - enabling precision analog-to-digital conversion without external timing components in space-constrained µMAX packages.
For engineers reviewing the MAX11201AEUB+ datasheet, MAX11201AEUB+ pinout, MAX11201AEUB+ application, or MAX11201AEUB+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and parametric differences.
Technical Context
The MAX11201AEUB+ employs a 3rd-order delta-sigma modulator with on-chip SINC4 digital filter, delivering >100dB 50Hz/60Hz line-noise rejection at its fixed 120sps output rate. Its fully differential analog input (AINP/AINN) and reference inputs (REFP/REFN) support ±VREF bipolar operation with >100MΩ input impedance and integrated buffers reducing input current to 20nA.
It uses a 2-wire serial interface (SCLK + RDY/DOUT), where RDY/DOUT serves dual roles: data-ready flag and MSB-first two's complement data output. Power management includes sleep mode (<0.4µA) activated by holding SCLK high after RDY/DOUT assertion, and on-demand self-calibration triggered via 26th SCLK pulse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit output with 19.1-bit noise-free resolution at 120sps - enables sub-1ppm measurement fidelity in low-bandwidth sensor systems. |
| Power Consumption | <320µA total active current (AVDD + DVDD) - allows continuous operation from coin-cell or energy-harvesting sources. |
| Line Noise Rejection | >100dB min rejection at 50Hz/60Hz - eliminates need for external notch filters in AC-mains-noisy industrial environments. |
| Input Architecture | Fully differential buffered inputs with ±VREF range and >100MΩ impedance - directly interfaces high-Z sensors (RTDs, bridges) without signal conditioning. |
| Reference Support | Differential REFP/REFN inputs (1.25V–AVDD range) - supports ratiometric or precision external references for stable gain calibration. |
| Interface | 2-wire serial (SCLK + RDY/DOUT) - reduces PCB routing complexity and I/O count vs. SPI/I²C, ideal for minimal-pin-count designs. |
| Operating Temp | -40°C to +85°C - qualified for deployment in uncontrolled industrial enclosures and field-mounted instrumentation. |
Pinout & Package
MAX11201AEUB+ is housed in a lead(Pb)-free, RoHS-compliant 10-pin µMAX (FMAX) package - 3mm × 3mm body, 0.65mm pitch, exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Analog & digital ground reference | Single ground plane required; decoupling capacitors must connect here to minimize noise coupling between analog/digital sections. |
| REFP (Pin 2) | Differential reference positive input | Must be > REFN; voltage between GND and AVDD - sets full-scale range and enables ratiometric accuracy with external references. |
| REFN (Pin 3) | Differential reference negative input | Must be < REFP; common-mode range 0–AVDD - forms precision voltage reference pair with REFP for ADC core. |
| AINN (Pin 4) | Negative fully differential analog input | Accepts inverted input signal; used with AINP for true differential measurement - rejects common-mode noise and offsets. |
| AINP (Pin 5) | Positive fully differential analog input | Accepts non-inverted input signal; paired with AINN - supports bipolar input range of ±VREF with no external amplification. |
| AVDD (Pin 6) | Analog supply voltage | +2.7V to +3.6V; powers modulator, reference buffer, and analog front-end - requires local 0.1µF bypass capacitor. |
| DVDD (Pin 7) | Digital supply voltage | +1.7V to +3.6V; powers digital logic and serial interface - independent rail allows low-voltage microcontroller interfacing. |
| RDY/DOUT (Pin 8) | Data ready flag / serial data output | Open-drain output; pulled low when conversion completes; outputs 24-bit two's complement data on SCLK rising edges. |
| SCLK (Pin 9) | Serial clock input | Accepts up to 5MHz clock; controls data read timing and sleep mode entry - no external pull-up required for basic operation. |
| CLK (Pin 10) | External clock input | Disables internal oscillator when driven; accepts 2.4576MHz for MAX11201A - used only if higher clock stability than internal oscillator is needed. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power active mode | <320µA total supply current enables multi-year battery life in portable instrumentation and wireless sensor nodes. |
| On-demand self-calibration | 26-clock-cycle command initiates offset/gain calibration - compensates for temperature drift and long-term aging without host intervention. |
| Integrated high-accuracy oscillator | 2.4576MHz internal clock trimmed to ±0.5% over temperature - eliminates crystal, load caps, and board area while maintaining timing integrity. |
| High-impedance buffered inputs | 20nA max input current and >100MΩ impedance - allows direct connection to RTDs, strain gauges, and thermistors without loading errors. |
| Robust ESD protection | ±2kV HBM on all pins - withstands handling and field-level electrostatic discharge without external protection components. |
Applications
| RTD Temperature Sensing | 4–20mA Loop-Powered Transmitters |
|---|---|
|
Use Scenario: Precision temperature measurement using Pt100/Pt1000 RTDs in process control valves and HVAC sensors. IC Role / Device Role / Timing Role: Delta-sigma ADC digitizes bridge output; internal oscillator synchronizes conversion; 2-wire interface minimizes loop wiring. Use Value: 19.1-bit NFR at 120sps resolves <0.01°C steps; low power extends battery life in wireless RTD nodes; integrated buffers eliminate op-amp stage. |
Use Scenario: Analog sensor signal conditioning and digitization inside 4–20mA current-loop transmitters for pressure, flow, or level sensing. IC Role / Device Role / Timing Role: Primary ADC in loop-powered design; operates from limited 3.6V headroom; sleep mode reduces average current draw. Use Value: <320µA active current fits within 4mA loop budget; >100dB 50/60Hz rejection prevents mains-induced errors; differential inputs reject common-mode noise on long cables. |
| Portable Weigh Scales | Low-Power Industrial Data Loggers |
|
Use Scenario: High-resolution weight measurement in handheld or battery-operated scales using load-cell bridges. IC Role / Device Role / Timing Role: Digitizes mV-level bridge output; self-calibration maintains accuracy across battery discharge and ambient temperature shifts. Use Value: 20.6-bit NFR not applicable (MAX11201B variant), but MAX11201AEUB+'s 19.1-bit NFR at 120sps captures rapid weight changes; 0.4µA sleep current extends runtime between charges. |
Use Scenario: Long-duration environmental monitoring (temperature, humidity, gas) in remote industrial sites powered by solar/battery. IC Role / Device Role / Timing Role: Low-duty-cycle ADC sampling sensor outputs; wakes on timer interrupt, converts, stores, then returns to deep sleep. Use Value: Sleep current <0.4µA enables years of operation on AA batteries; 2-wire interface simplifies MCU GPIO usage; internal clock removes timing component dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power, high-resolution delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11201BEUB+ | 13.75sps output rate, 20.6-bit noise-free resolution, 2.25275MHz internal clock, 100dB+ 50/60Hz rejection | Better suited for static measurements (e.g., precision weigh scales, lab instruments) where speed is secondary to resolution | Select MAX11201BEUB+ when maximizing ENOB and noise performance is critical and 120sps is excessive; same pinout and footprint. |
| ADS124S08IPW | 24-bit, 4kSPS max, integrated PGA (1–128x), VREF buffer, 3.6V supply, SPI interface, 1.8–3.6V IO | Requires external clock or crystal; needs SPI-capable MCU; higher power (~1.3mA active); supports multiplexed multi-channel sensing | Choose ADS124S08IPW for multi-sensor systems needing programmable gain and channel scanning; not drop-in - different interface and layout. |
Compared with MAX11201BEUB+, the MAX11201AEUB+ trades 1.5 bits of noise-free resolution for 8.7× faster data rate - making it optimal for dynamic industrial signals. Against ADS124S08IPW, it offers lower power and simpler 2-wire interface but lacks PGA and multi-channel capability.
Availability
MAX11201AEUB+ is available at Aetrix Electronics and suitable for industrial sensor transmitters, portable instrumentation, and battery-powered data loggers requiring stable component supply, long-lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX11201AEUB+ 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 precision analog, mixed-signal, and high-reliability ICs for industrial, medical, and automotive applications.
The MAX11201 family was designed specifically for ultra-low-power, high-accuracy sensor digitization in resource-constrained industrial systems - prioritizing resolution-per-microwatt, integrated timing, and robustness in noisy 4–20mA loop environments.
FAQ
What is the maximum sample rate of the MAX11201AEUB+?
The MAX11201AEUB+ has a fixed output data rate of 120 samples per second (sps), as defined by its internal 2.4576MHz oscillator and SINC4 filter configuration. This rate cannot be adjusted via software or external clock - it is a hardware-locked specification for this variant. The MAX11201AEUB+ does not support variable data rates or oversampling modes beyond this value.
Does the MAX11201AEUB+ require external components for basic operation?
No, the MAX11201AEUB+ requires only two 0.1µF ceramic bypass capacitors (one on AVDD, one on DVDD) placed near their respective pins for stable operation. Its internal 2.4576MHz oscillator eliminates the need for an external crystal or RC network, and its buffered inputs allow direct connection to high-impedance sensors without op-amps or gain stages.
How does the 2-wire interface of the MAX11201AEUB+ differ from standard I²C?
The MAX11201AEUB+ 2-wire interface uses SCLK and RDY/DOUT but is not I²C-compatible. It lacks address bytes, ACK/NACK signaling, and bidirectional data lines. Communication is unidirectional (read-only), timing-driven (data read via SCLK edges), and relies on RDY/DOUT state transitions to indicate readiness - requiring custom firmware rather than standard I²C drivers.
Can the MAX11201AEUB+ perform self-calibration automatically on power-up?
Yes, the MAX11201AEUB+ performs automatic offset and gain self-calibration during its power-on reset (POR) sequence when triggered by either AVDD or DVDD crossing their POR thresholds (~1.25V/1.2V). For best accuracy, ensure the reference voltage (REFP–REFN) is stable before POR completes; if unstable, manual calibration via 26 SCLK pulses is recommended post-startup.
What is the absolute maximum input voltage range for AINP and AINN on the MAX11201AEUB+?
The absolute maximum voltage on AINP and AINN is –0.3V to (VAVDD + 0.3V) relative to GND, per the Absolute Maximum Ratings table. For normal operation, the differential input range is ±VREF, and the common-mode voltage must stay within GND to VAVDD. Exceeding these limits risks permanent damage or measurement error due to input stage saturation.
MAX11201AEUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 120
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Serial
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11201AEUB+ FAQ
1.How can I place an order for MAX11201AEUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11201AEUB+ 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 MAX11201AEUB+ reliable?
The price and inventory of MAX11201AEUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11201AEUB+ is usually 5 days.
3.What payment methods are accepted for MAX11201AEUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11201AEUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11201AEUB+?
MAX11201AEUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11201AEUB+ 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 MAX11201AEUB+?
For technical support, including MAX11201AEUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11201AEUB+ requirements.
6.How does Aetrix verify that MAX11201AEUB+ is sourced from the original manufacturer or authorized distributors?
All MAX11201AEUB+ 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 MAX11201AEUB+ meets industry standards.
7.What is the process for return or replacement of MAX11201AEUB+?
All MAX11201AEUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11201AEUB+, 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 MAX11201AEUB+ part is unused and in its original packaging.
Return procedure for MAX11201AEUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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