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Analog Devices Inc./Maxim Integrated MAX11201BEUB+T
- Part No.:
- MAX11201BEUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX11201BEUB+T.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,636
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Product details
Overview
MAX11201BEUB+T 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 20.6-bit noise-free resolution at 13.75sps, <320µA active current, >100dB 50/60Hz line-noise rejection, and operates from 2.7V–3.6V AVDD with fully differential buffered inputs.
For engineers reviewing the MAX11201BEUB+T datasheet, MAX11201BEUB+T pinout, MAX11201BEUB+T application, or MAX11201BEUB+T equivalent, this page provides verified technical context, real-world timing behavior, calibrated noise performance at 13.75sps, and design-meaningful interface timing constraints for low-power sensor node integration.
Technical Context
The MAX11201BEUB+T implements a third-order delta-sigma modulator with on-chip SINC4 digital filter, using a trimmed 2.25275MHz internal oscillator to achieve precise 13.75sps output rate. Its fully differential analog input stage includes integrated buffers enabling >100MΩ input impedance and ±20nA dynamic input current.
It employs a 2-wire serial interface (SCLK + RDY/DOUT) with dual-role RDY/DOUT signaling data readiness and shifting out 24-bit two's complement codes on SCLK rising edges - no separate CS or data direction control required. Power-on reset monitors both AVDD and DVDD with 100mV hysteresis and triggers self-calibration upon digital POR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit delta-sigma architecture with 20.6-bit noise-free resolution at 13.75sps - enables sub-1µV RMS noise detection in precision RTD or bridge sensing. |
| Sampling Rate | 13.75 samples per second - fixed by internal 2.25275MHz clock division; eliminates external timing component selection. |
| Power Consumption | <320µA total active current (AVDD + DVDD), <0.4µA sleep current - supports multi-year battery life in portable instrumentation. |
| Line-Noise Rejection | >100dB min rejection at 50Hz/60Hz - ensures stable readings in electrically noisy industrial environments without external notch filters. |
| Input Structure | Fully differential buffered inputs (AINP/AINN) with ±3.6VFS range and 700nVRMS noise - accepts direct connection to high-impedance sensors without signal conditioning. |
| Reference Interface | Differential REFP/REFN inputs supporting 1.25V–VAVDD range - allows ratiometric operation with external reference or internal AVDD as reference. |
| Integral Nonlinearity | ±10ppm FSR max - guarantees monotonicity and ≤1 LSB error across full scale for calibration-critical applications. |
Pinout & Package
MAX11201BEUB+T is housed in a lead(Pb)-free, RoHS-compliant 10-pin µMAX (FMAX) package - 3mm × 3mm body, 0.5mm 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 more positive than REFN; voltage range 0V to VAVDD; sets full-scale input range when paired with REFN. |
| REFN (Pin 3) | Differential reference negative input | Must be more negative than REFP; common-mode range matches REFP; differential voltage ≥1.25V required for full 24-bit performance. |
| AINN (Pin 4) | Negative fully differential analog input | High-impedance buffered input; accepts voltages from GND+100mV to VAVDD−100mV; pairs with AINP for bipolar (±VREF) measurement. |
| AINP (Pin 5) | Positive fully differential analog input | Identical electrical specs to AINN; differential input range = −(VREFP−VREFN) to +(VREFP−VREFN); enables direct RTD or strain gauge interfacing. |
| AVDD (Pin 6) | Analog supply voltage | 2.7V–3.6V range; powers modulator, reference buffer, and analog front-end; requires local 0.1µF ceramic bypass to GND. |
| DVDD (Pin 7) | Digital supply voltage | 1.7V–3.6V range; powers digital logic and serial interface; independent from AVDD for flexible power domain partitioning. |
| RDY/DOUT (Pin 8) | Data-ready flag & serial data output | Open-drain output; pulls low when conversion completes; shifts out 24-bit two's complement data on SCLK rising edges; 25th pulse returns to high idle state. |
| SCLK (Pin 9) | Serial clock input | Accepts up to 5MHz external clock; controls data read timing and mode transitions (sleep, calibrate); no internal pull-up required. |
| CLK (Pin 10) | External system clock input | Disables internal oscillator when driven; accepts 2.25275MHz clock for MAX11201B; used only if precise external timing synchronization is needed. |
Key Features
| Feature | Design Value |
|---|---|
| On-demand self-calibration | Initiated via 26th SCLK pulse; corrects offset/gain drift due to temperature or supply variation - eliminates need for periodic manual recalibration in field-deployed sensors. |
| Ultra-low sleep current | <0.4µA total (AVDD + DVDD) - enables microcontroller-controlled wake-up intervals down to seconds without compromising battery lifetime in wireless sensor nodes. |
| Integrated input buffers | Reduces average input current to ±20nA and raises input impedance to >100MΩ - permits direct connection to high-Z sources like thermistors or piezoresistive elements without loading error. |
| 2-wire serial interface | Uses only SCLK and RDY/DOUT pins - reduces PCB routing complexity and I/O count versus SPI/I²C, ideal for space-constrained modules and ASIC companion ADCs. |
| Robust ESD protection | ±2kV HBM on all analog and digital pins - meets industrial IEC 61000-4-2 Level 2 requirements without external TVS diodes. |
Applications
| RTD Temperature Sensing | Strain Gauge Bridge Measurement |
|---|---|
|
Use Scenario: Precision temperature monitoring in HVAC controllers and process transmitters using Pt100/Pt1000 RTDs in 4–20mA loop-powered devices. IC Role / Device Role / Timing Role: Primary ADC digitizing ratiometric voltage across RTD and reference resistor; 13.75sps output rate aligns with thermal time constants and avoids aliasing of slow ambient drift. Use Value: 20.6-bit noise-free resolution enables 0.01°C temperature resolution over −200°C to +850°C range without external amplification or filtering. |
Use Scenario: Load cell and pressure transducer signal acquisition in industrial weighing systems and hydraulic monitoring equipment. IC Role / Device Role / Timing Role: High-impedance differential ADC capturing mV-level bridge outputs; buffered inputs reject common-mode noise from long cable runs. Use Value: 700nVRMS noise and >100dB 50/60Hz rejection ensure stable 1:1,000,000 dynamic range in factory-floor EMI environments. |
| Portable Gas Detection Sensors | Battery-Powered Environmental Monitors |
|
Use Scenario: Electrochemical gas sensor readout in handheld safety instruments requiring multi-year battery life and high sensitivity to ppm-level toxic gases. IC Role / Device Role / Timing Role: Low-power ADC converting sensor current-to-voltage output; sleep mode activated between readings to minimize quiescent drain. Use Value: <0.4µA sleep current extends CR2032 battery life beyond 5 years at 1-minute sampling intervals. |
Use Scenario: Wireless air quality nodes measuring CO₂, VOCs, and particulate matter in smart building deployments. IC Role / Device Role / Timing Role: Central analog front-end ADC interfacing with multiple conditioned sensor channels via multiplexer; 2-wire interface conserves MCU GPIO resources. Use Value: Single 2.7–3.6V supply operation simplifies power architecture; internal oscillator eliminates timing crystal cost and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power, high-resolution ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPWR | 24-bit, 4kSPS SPI ADC with PGA, 1.8V–3.6V supply, 350µA active current; no internal oscillator; requires external clock or crystal. | Higher speed and integrated PGA support multi-sensor scanning; less suitable for fixed 13.75sps line-noise rejection-critical use cases. | Select when programmable gain or faster update rates are needed; avoid if minimal BOM count and guaranteed 50/60Hz rejection are primary goals. |
| AD7172-2BRUZ | 24-bit, 31.25kSPS ΣΔ ADC with SPI, 2.7V–3.6V supply, 1.2mA active current; includes internal reference and diagnostic features. | Targeted at high-channel-count PLC modules; higher power and larger 24-pin TSSOP package increase system cost and size. | Choose for multi-channel synchronized acquisition or built-in diagnostics; not recommended for single-channel, battery-operated, space-constrained designs. |
Compared with ADS124S08IPWR and AD7172-2BRUZ, the MAX11201BEUB+T uniquely combines sub-1µV RMS noise at 13.75sps, <320µA active current, and guaranteed >100dB line-noise rejection in a 10-pin µMAX package - making it optimal for single-sensor, loop-powered, or battery-life-critical industrial measurement nodes.
Availability
MAX11201BEUB+T is available at Aetrix Electronics and suitable for RTD temperature sensing, strain gauge bridge measurement, portable gas detection sensors, and battery-powered environmental monitors requiring stable component supply and long-term production continuity.
Supply support for MAX11201BEUB+T 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 industrial, medical, and communications applications - emphasizing high accuracy, low power, and robust operation.
The MAX11201 series targets ultra-low-power, high-dynamic-range sensor digitization in harsh industrial environments - specifically engineered for 4–20mA loop-powered transmitters and battery-operated measurement nodes where resolution-per-microwatt is critical.
FAQ
What is the maximum sample rate of the MAX11201BEUB+T?
The MAX11201BEUB+T has a fixed output data rate of 13.75 samples per second, determined by its internal 2.25275MHz oscillator and SINC4 filter configuration. This rate is not user-programmable and is optimized to provide >100dB rejection of 50Hz and 60Hz line noise without external filtering components.
Does the MAX11201BEUB+T require an external reference voltage?
The MAX11201BEUB+T supports both external and ratiometric reference configurations. It requires a differential reference voltage applied across REFP and REFN pins, with a minimum of 1.25V and maximum of VAVDD. An external precision reference can be used for highest absolute accuracy, or AVDD itself may serve as the reference for ratiometric sensor measurements.
How does the 2-wire interface of the MAX11201BEUB+T work without a chip select or data direction pin?
The MAX11201BEUB+T uses RDY/DOUT as a dual-function pin: it asserts low to signal data readiness, then shifts out 24-bit two's complement data on each SCLK rising edge. No chip select is needed because communication is event-driven - the host reads only when RDY/DOUT goes low, and the 25th SCLK pulse resets the pin to high-idle state.
Can the MAX11201BEUB+T perform self-calibration automatically after waking from sleep mode?
Yes - the MAX11201BEUB+T supports self-calibration at wake-up. After reading all 24 bits and issuing the 25th SCLK to return RDY/DOUT high, holding SCLK high for >100ns before pulling it low initiates automatic offset/gain calibration upon exit from sleep mode - compensating for thermal and supply drift during extended shutdown periods.
What is the input voltage range specification for the MAX11201BEUB+T analog inputs?
The MAX11201BEUB+T analog inputs (AINP and AINN) accept fully differential signals within ±VREF, where VREF = VREFP − VREFN. Each input must remain between GND+100mV and VAVDD−100mV. The device includes input buffers that maintain high impedance (>100MΩ) and limit dynamic input current to ±20nA across this range.
MAX11201BEUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 13.75
- 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:
- -
MAX11201BEUB+T FAQ
1.How can I place an order for MAX11201BEUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11201BEUB+T 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 MAX11201BEUB+T reliable?
The price and inventory of MAX11201BEUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11201BEUB+T is usually 5 days.
3.What payment methods are accepted for MAX11201BEUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11201BEUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11201BEUB+T?
MAX11201BEUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11201BEUB+T 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 MAX11201BEUB+T?
For technical support, including MAX11201BEUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11201BEUB+T requirements.
6.How does Aetrix verify that MAX11201BEUB+T is sourced from the original manufacturer or authorized distributors?
All MAX11201BEUB+T 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 MAX11201BEUB+T meets industry standards.
7.What is the process for return or replacement of MAX11201BEUB+T?
All MAX11201BEUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11201BEUB+T, 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 MAX11201BEUB+T part is unused and in its original packaging.
Return procedure for MAX11201BEUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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