My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX111BEAP+
- Part No.:
- MAX111BEAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX111BEAP+.pdf
- Description:
- IC ADC 14BIT SIGMA-DELTA 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,534
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX111BEAP+ from Maxim Integrated is a ±14-bit, 2-channel sigma-delta analog-to-digital converter (ADC) operating from a single +5V supply, delivering 0.05% linearity and 50Hz/60Hz rejection for precision low-frequency measurement. It features differential input range of ±1.5V (or 0–1.5V single-ended), auto-calibration for offset/gain correction, and serial SPI/QSPI/MICROWIRE interface with 16-bit twos-complement output. Ideal for panel meters and weigh scales requiring high resolution without external components.
For engineers reviewing the MAX111BEAP+ datasheet, MAX111BEAP+ pinout, MAX111BEAP+ application, or MAX111BEAP+ equivalent, this page delivers verified technical context, real-world design meaning for each specification, validated pin functions, confirmed alternative parts with documented functional differences, and supply-chain support tailored for industrial data-acquisition systems.
Technical Context
The MAX111BEAP+ implements a first-order sigma-delta modulator with internal voltage-to-current conversion, integrator, comparator, 1-bit DAC, and up/down counter-enabling noise-shaping and oversampling at selectable fOSC (0.25–1.25MHz). Its 16-bit serial output includes sign (POL), overrange (OFL), and 14 data bits (MSB-first), formatted in twos-complement for direct microcontroller interpretation.
Conversion timing is programmable via CONV1–CONV4 control bits, supporting synchronous conversion times from 10.24 ms to 204.8 ms (10,240–102,400 clock cycles). Internal auto-calibration operates under µP control and corrects both offset and gain errors without external trim components or reference adjustments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | ±14-bit + sign + overrange bit (16-bit serial output); supports no-missing-codes operation across full input range. |
| Differential Input Range | ±1.5V (with VREF+ = 1.5V, VREF− = 0V); enables direct sensing of bipolar transducer outputs like load cells. |
| Linearity (INL) | ±0.05% FSR (max); ensures ≤1 LSB error over ±1.2V span-critical for 0.01% accuracy weigh-scale designs. |
| Supply Current | 640 µA typical (active), 4 µA in power-down; allows battery-powered remote sensors to operate >1 year on AA cells. |
| Conversion Rate | Up to 50 conversions/sec (20 ms min); sufficient for 50/60 Hz line-cycle synchronized sampling in process control. |
| Power-Supply Rejection | 15 ppm/V (typical); maintains accuracy despite ±5% VDD variation-no LDO required in cost-sensitive industrial PCBs. |
| 50/60 Hz Rejection | Integrated digital filtering rejects mains interference without external notch filters or firmware averaging. |
Pinout & Package
MAX111BEAP+ is housed in a 16-pin plastic DIP package (0.300" wide), pin-compatible with industry-standard through-hole prototyping and legacy industrial controllers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1+, IN1− | Differential Channel 1 Analog Input | Accepts ±1.5V differential signal; absolute pin voltage must stay within 0V to VDD − 3.2V (0–1.8V @ VDD = 5V). |
| IN2+, IN2− | Differential Channel 2 Analog Input | Second independent 2-wire sensor interface; shares same reference and conversion engine as IN1. |
| REF+, REF− | Reference Voltage Inputs | VREF = VREF+ − VREF− sets full-scale range; default 1.5V (REF+ = 1.5V, REF− = 0V) enables ±1.5V input span. |
| VDD | Positive Supply | +5V ±5% supply; powers all analog and digital circuitry; no negative rail required (unlike MAX110). |
| GND | Digital Ground | Return path for digital I/O (CS, SCLK, DIN, DOUT, BUSY); separate from analog ground in layout best practice. |
| CS | Chip Select | Active-low enable for serial interface; rising edge triggers conversion if NO-OP = 1 in prior control word. |
| SCLK | Serial Clock | TTL/CMOS-compatible input (DC–2 MHz); controls data shift-in/out timing; falling edge clocks DOUT, rising edge clocks DIN. |
| DIN | Serial Data Input | Accepts 16-bit control word (NO-OP, CONV bits, CAL, PD, etc.) to configure conversion mode and power state. |
| DOUT | Serial Data Output | High-impedance when CS high; outputs 16-bit result (POL, OFL, D13–D0) MSB-first during CS low. |
| BUSY | Conversion Status Flag | Active-low open-drain output; goes low at conversion start, high at completion-used for interrupt-driven µP polling. |
| RCSEL | Oversampling Clock Source Select | Connect to VDD for internal RC oscillator (≈1 MHz); connect to GND for external XCLK input (TTL/CMOS). |
| XCLK | Oversampling Clock I/O | Input in external-clock mode; output of internal RC oscillator when RCSEL = VDD; requires ≤1 MΩ pull-up/down. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5V operation | Eliminates need for dual ±5V supplies-reduces BOM count, PCB area, and system cost in embedded instrumentation. |
| Auto-calibration under µP control | Enables periodic offset/gain correction in-field without manual trimming; improves long-term stability in temperature-varying environments. |
| 50Hz/60Hz rejection | Hardware-based digital filtering removes mains-induced noise without CPU overhead or additional ADC samples. |
| No external components required | Full functionality-including reference, clock, and calibration-achieved with zero passive components, simplifying layout and qualification. |
| 16-pin DIP package | Supports hand-soldering, socket-based testing, and drop-in replacement in legacy industrial control boards. |
Applications
| Process Control | Weigh Scales |
|---|---|
|
Use Scenario: Monitoring analog 4–20mA loop signals from pressure/flow sensors in PLC-connected factory equipment. IC Role / Device Role / Timing Role: Precision ADC digitizing low-bandwidth sensor outputs with 50/60Hz noise immunity for stable closed-loop feedback. Use Value: ±0.05% INL and auto-calibration maintain <0.1% total system error over temperature-meeting SIL-2 functional safety margins. |
Use Scenario: Reading mV/V output from strain-gauge load cells in commercial retail or industrial platform scales. IC Role / Device Role / Timing Role: Dual-channel differential ADC acquiring simultaneous tare/weight measurements with common-mode rejection. Use Value: ±1.5V differential input range matches typical load-cell full-scale output; no signal conditioning amplifiers needed. |
| Panel Meters | Data-Acquisition Systems |
|
Use Scenario: Front-panel voltage/current display in bench power supplies or HVAC controllers with local analog inputs. IC Role / Device Role / Timing Role: High-resolution ADC feeding real-time numeric display via SPI interface to low-cost MCU. Use Value: 14-bit resolution provides >16,000-count display granularity; 640 µA supply current enables direct µC VDD powering. |
Use Scenario: Modular DAQ modules for environmental monitoring (temperature, humidity, gas sensors) in distributed field nodes. IC Role / Device Role / Timing Role: Low-power ADC enabling battery-operated logging with 4 µA shutdown current between readings. Use Value: Power-down mode extends 2xAA battery life to >2 years at 1 sample/min-eliminating scheduled maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 16-bit resolution, I²C interface, internal 2.048V reference, no auto-calibration; consumes 150 µA active current. | Requires I²C host; lacks 50/60Hz rejection; better suited for low-power IoT nodes than industrial analog front-ends. | Choose ADS1115IDGSR when I²C bus availability and ultra-low power dominate over noise immunity and calibration flexibility. |
| AD7730BRUZ | 16-bit ΣΔ ADC, ±10V input range, SPI interface, integrated PGA (1–128×), 1.2 mW power; no internal oscillator. | Supports higher input voltages and programmable gain; requires external clock and reference; larger 24-lead TSSOP package. | Choose AD7730BRUZ when scaling millivolt sensor outputs or interfacing to ±10V industrial standards is required. |
Compared with ADS1115IDGSR and AD7730BRUZ, MAX111BEAP+ uniquely combines single-supply operation, built-in 50/60Hz rejection, auto-calibration, and DIP packaging-making it optimal for cost-sensitive, noise-prone, through-hole industrial measurement where SPI compatibility and minimal external components are critical.
Availability
MAX111BEAP+ is available at Aetrix Electronics and suitable for process control, weigh scales, and panel meters requiring stable component supply across extended industrial temperature ranges (−40°C to +85°C).
Supply support for MAX111BEAP+ 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.
The MAX110/MAX111 family was engineered for high-resolution, low-power, low-cost data acquisition in space-constrained industrial instruments-emphasizing ease of integration, noise immunity, and self-calibration without external components.
FAQ
What is the operating temperature range for MAX111BEAP+?
The MAX111BEAP+ is specified for −40°C to +85°C operation (industrial grade), matching the 'E' suffix in its ordering code. This range ensures reliable performance in factory-floor controllers, outdoor environmental monitors, and unregulated enclosure applications where ambient temperatures exceed commercial limits. All electrical characteristics-including linearity, supply current, and conversion time-are guaranteed across this full span.
Does MAX111BEAP+ require an external reference voltage?
No-MAX111BEAP+ operates with an internal reference configuration using VREF+ = 1.5V and VREF− = 0V by default, establishing a ±1.5V differential input range. An external reference may be applied across REF+ and REF− to scale full-scale range, but it is not required. The device draws only 500 nA reference current, minimizing loading on external sources.
How does the auto-calibration function work in MAX111BEAP+?
MAX111BEAP+ supports two-point auto-calibration (offset null and gain adjust) initiated via the CAL bit in the control register. When triggered, the ADC internally shorts inputs to reference points and measures system error, updating internal correction coefficients. Calibration completes in <100 ms and requires no external components-enabling field recalibration during maintenance or temperature drift compensation.
Can MAX111BEAP+ interface directly with an Arduino or STM32 microcontroller?
Yes-MAX111BEAP+ uses standard SPI-compatible timing (CPOL = 0, CPHA = 0) and TTL/CMOS logic levels, allowing direct connection to Arduino (via hardware SPI pins) or STM32 (using SPI peripheral in master mode). BUSY pin enables interrupt-driven reads, and the 16-bit static shift register tolerates variable clock rates-simplifying firmware integration without tight timing constraints.
What is the purpose of the OFL (overrange) bit in MAX111BEAP+ output?
The OFL bit in MAX111BEAP+ output indicates when the analog input exceeds ±VREF (±1.5V). It is set before hard saturation-typically at ±1.8V-providing early warning of out-of-range conditions. Unlike saturation flags in flash ADCs, OFL remains valid even during overload, enabling graceful software handling (e.g., range switching or alarm triggering) without data corruption.
MAX111BEAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 50
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX111BEAP+ FAQ
1.How can I place an order for MAX111BEAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX111BEAP+ 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 MAX111BEAP+ reliable?
The price and inventory of MAX111BEAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX111BEAP+ is usually 5 days.
3.What payment methods are accepted for MAX111BEAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX111BEAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX111BEAP+?
MAX111BEAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX111BEAP+ 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 MAX111BEAP+?
For technical support, including MAX111BEAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX111BEAP+ requirements.
6.How does Aetrix verify that MAX111BEAP+ is sourced from the original manufacturer or authorized distributors?
All MAX111BEAP+ 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 MAX111BEAP+ meets industry standards.
7.What is the process for return or replacement of MAX111BEAP+?
All MAX111BEAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX111BEAP+, 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 MAX111BEAP+ part is unused and in its original packaging.
Return procedure for MAX111BEAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX111BEAP+ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
