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Analog Devices Inc./Maxim Integrated MAX11201BEUB+
- Part No.:
- MAX11201BEUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX11201BEUB+.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,817
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Product details
Overview
MAX11201BEUB+ 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, 700nVRMS input-referred noise (±3.6VFS), and >100dB 50/60Hz line-noise rejection - all with <320µA total active current and integrated 2.25275MHz oscillator.
For engineers reviewing the MAX11201BEUB+ datasheet, MAX11201BEUB+ pinout, MAX11201BEUB+ application, or MAX11201BEUB+ equivalent, this page provides verified technical context, real-world timing behavior, validated 2-wire interface operation, and precise noise/line-rejection performance at its rated 13.75sps output rate.
Technical Context
The MAX11201BEUB+ implements a 3rd-order delta-sigma modulator followed by an on-chip SINC4 digital filter, delivering 20.6-bit noise-free resolution at its fixed 13.75sps data rate. Its internal 2.25275MHz oscillator eliminates external clock components and enables deterministic conversion timing with 73ms data-ready latency after wake-up or calibration.
It features fully differential analog inputs (AINP/AINN) and reference inputs (REFP/REFN), high-impedance buffered signal paths (20nA dynamic input current), and dual-supply operation (2.7–3.6V AVDD, 1.7–3.6V DVDD). The 2-wire serial interface uses RDY/DOUT for both data-ready signaling and MSB-first two's complement data output synchronized to SCLK rising edges.
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-1ppm measurement fidelity in low-bandwidth sensor systems. |
| Data Rate | 13.75 samples per second - fixed output rate for MAX11201B variant; determines SINC4 filter settling and 50/60Hz rejection bandwidth. |
| Input Noise | 700nVRMS (±3.6VFS) - defines minimum detectable signal change (~0.02µV LSB) in precision bridge or RTD applications. |
| Line Rejection | >100dB min at 50Hz/60Hz - achieved via synchronized SINC4 filtering; eliminates need for external notch filters in AC-mains environments. |
| Power Consumption | <320µA total active current, <0.4µA sleep current - supports multi-year battery life in portable instrumentation and loop-powered sensors. |
| INL Error | ±10ppm FSR max - ensures monotonicity and <1LSB error across full ±VREF input range for calibrated industrial transmitters. |
| Supply Range | AVDD: 2.7–3.6V; DVDD: 1.7–3.6V - allows direct interfacing with 3.3V or 1.8V logic while maintaining analog performance. |
Pinout & Package
MAX11201BEUB+ 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 | Analog & digital ground reference | Single ground plane required; connects to system AGND/DGND star point to minimize PSRR degradation. |
| REFP / REFN | Differential reference voltage inputs | Accept 1.25V–VAVDD differential reference; common-mode range 0–VAVDD; enables ratiometric measurements with external references. |
| AINP / AINN | Fully differential analog inputs | High-impedance buffered inputs (20nA dynamic current); support ±VREF bipolar input range for bridge/RTD front-ends. |
| AVDD | Analog supply voltage | 2.7–3.6V supply; bypass with 0.1µF capacitor near pin to suppress noise coupling into modulator. |
| DVDD | Digital supply voltage | 1.7–3.6V supply; independent of AVDD; enables mixed-voltage system integration without level shifters. |
| RDY/DOUT | Data-ready flag & serial data output | Open-drain capable; pulls low when conversion completes; outputs 24-bit two's complement data on SCLK rising edges. |
| SCLK | Serial clock input | Accepts up to 5MHz clock; controls data read timing, sleep activation (hold high), and self-calibration trigger (26th edge). |
| CLK | External clock input | Disables internal oscillator when driven; accepts 2.25275MHz clock for MAX11201B; used only if external timing sync is required. |
Key Features
| Feature | Design Value |
|---|---|
| On-demand offset/gain self-calibration | Executed via 26th SCLK pulse; compensates for temperature drift and supply variation without host MCU intervention. |
| Programmable sleep mode activation | Enter sleep by holding SCLK high after RDY/DOUT goes low; reduces current to <0.4µA without losing configuration state. |
| Integrated 2.25275MHz oscillator | Eliminates external crystal/capacitors; trimmed for ±0.5% accuracy over -40°C to +85°C; enables rapid wake-up and deterministic timing. |
| ±2kV HBM ESD protection | Protects AINP, AINN, REFP, REFN, AVDD, DVDD, CLK, SCLK, RDY/DOUT - enhances robustness in industrial field connections. |
| 2-wire serial interface | Uses only SCLK and RDY/DOUT pins; requires no chip-select or data-direction control; simplifies PCB routing and reduces GPIO count. |
Applications
| RTD Temperature Transmitter | Low-Power Weigh Scale |
|---|---|
|
Use Scenario: Precision 4-wire RTD measurement in loop-powered 4–20mA temperature transmitters deployed in hazardous areas. IC Role / Device Role / Timing Role: Primary ADC capturing ratiometric bridge voltage; operates continuously at 13.75sps with internal clock; performs on-demand calibration during maintenance cycles. Use Value: 20.6-bit noise-free resolution enables <0.01°C temperature resolution over -200°C to +850°C range using Pt100/1000 sensors. |
Use Scenario: Battery-operated portable weigh scale requiring multi-year operation on coin-cell power. IC Role / Device Role / Timing Role: Low-duty-cycle ADC sampling load cell output only during weighing events; enters sleep mode between readings to minimize average current. Use Value: <0.4µA sleep current extends battery life beyond 5 years; 700nVRMS noise ensures <1g repeatability on 10kg full-scale platform. |
| Industrial Pressure Sensor Node | Portable Gas Detector |
|
Use Scenario: MEMS pressure sensor signal conditioning in explosion-proof enclosures with strict power budgets. IC Role / Device Role / Timing Role: High-impedance ADC front-end for Wheatstone bridge output; rejects 50/60Hz interference from nearby motor drives via built-in SINC4 filter. Use Value: >100dB line-noise rejection eliminates need for external analog filtering; 2.7–3.6V AVDD range matches regulated 3.3V sensor supply rails. |
Use Scenario: Electrochemical gas sensor readout in handheld safety monitors powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Ultra-low-power ADC digitizing nanoamp-level sensor currents; wakes on interrupt to capture transient gas exposure events. Use Value: 24-bit resolution resolves sub-ppm gas concentration changes; <320µA active current enables >24hr continuous monitoring per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, low-power delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit, 4-kSPS max, SPI interface, integrated PGA and burnout current sources; higher power (350µA active) | Requires external PGA for low-level signals; better suited for multi-channel, programmable-gain sensor arrays | Select for designs needing on-chip amplification or >100sps throughput; not drop-in due to SPI vs. 2-wire interface and different pinout. |
| AD7172-2BRUZ | 24-bit, 31.25kSPS max, SPI interface, 125dB 50/60Hz rejection, 2.5µVRMS noise at 10sps | Higher noise floor and larger package (24-lead TSSOP); targets lab-grade instrumentation over battery life | Select when ultimate line rejection or multi-channel capability is critical; avoid for space-constrained or ultra-low-power nodes. |
Compared with ADS124S08IPW and AD7172-2BRUZ, the MAX11201BEUB+ uniquely balances sub-µV noise, 2-wire simplicity, and sub-µA sleep current - making it optimal for single-channel, battery- or loop-powered field sensors where minimal BOM count and longest runtime are design priorities.
Availability
MAX11201BEUB+ is available at Aetrix Electronics and suitable for industrial pressure transmitters, portable gas detectors, RTD temperature transmitters, and low-power weigh scales requiring stable component supply across extended production lifecycles.
Supply support for MAX11201BEUB+ 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 small-footprint integration.
The MAX11200/MAX11201 family targets ultra-low-power, high-resolution sensor signal chains - specifically engineered for 4–20mA loop-powered instruments, battery-operated measurement devices, and space-constrained industrial nodes demanding >100dB line-noise immunity.
FAQ
What is the exact data rate and noise performance of the MAX11201BEUB+?
The MAX11201BEUB+ operates at a fixed output data rate of 13.75 samples per second. At this rate, it achieves 20.6-bit noise-free resolution and 700nVRMS input-referred noise (±3.6VFS). This performance is validated in the datasheet's Electrical Characteristics table under "Noise-Free Resolution" for MAX11201B and confirmed in Typical Operating Characteristics figure toc14 (noise histogram at 13.75sps). These values define its suitability for high-precision, low-bandwidth sensor interfaces.
Does the MAX11201BEUB+ require external components for clocking or reference?
No - the MAX11201BEUB+ integrates a factory-trimmed 2.25275MHz internal oscillator, eliminating the need for external crystals or timing components. It also supports fully differential reference inputs (REFP/REFN) that accept any stable 1.25V–VAVDD voltage source; no external reference IC is required unless higher initial accuracy or temperature stability is needed beyond the device's ±10ppm INL spec.
How does the 2-wire interface of the MAX11201BEUB+ work in practice?
The MAX11201BEUB+ uses SCLK and RDY/DOUT for bidirectional communication: RDY/DOUT signals data readiness (goes low at conversion completion) and outputs 24-bit two's complement data on each SCLK rising edge. A 25th SCLK pulse returns RDY/DOUT to high idle; a 26th pulse triggers self-calibration. No chip-select or direction control is needed - simplifying firmware and reducing GPIO usage compared to SPI/I²C interfaces.
What is the guaranteed 50Hz/60Hz rejection for the MAX11201BEUB+?
The MAX11201BEUB+ guarantees >100dB minimum rejection of both 50Hz and 60Hz line noise when operating at its specified 13.75sps data rate. This is explicitly stated in the Features list ("> 100dB (min) 50Hz/60Hz Rejection (MAX11201B)") and confirmed in the Electrical Characteristics table under "Normal-Mode 50Hz Rejection" and "Normal-Mode 60Hz Rejection", both specified as 100–144dB for MAX11201B.
Can the MAX11201BEUB+ operate from a single 3.3V supply?
Yes - the MAX11201BEUB+ supports independent analog and digital supplies: AVDD may be 2.7–3.6V and DVDD may be 1.7–3.6V. Using a single 3.3V rail for both AVDD and DVDD is fully compliant and commonly implemented. The device maintains full specification compliance (including noise, INL, and line rejection) across this range, as verified in the Absolute Maximum Ratings and Electrical Characteristics tables.
MAX11201BEUB+ 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):
- 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+ FAQ
1.How can I place an order for MAX11201BEUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11201BEUB+ 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+ reliable?
The price and inventory of MAX11201BEUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11201BEUB+ is usually 5 days.
3.What payment methods are accepted for MAX11201BEUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11201BEUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11201BEUB+?
MAX11201BEUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11201BEUB+ 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+?
For technical support, including MAX11201BEUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11201BEUB+ requirements.
6.How does Aetrix verify that MAX11201BEUB+ is sourced from the original manufacturer or authorized distributors?
All MAX11201BEUB+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX11201BEUB+?
All MAX11201BEUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11201BEUB+, 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+ part is unused and in its original packaging.
Return procedure for MAX11201BEUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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