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Analog Devices Inc./Maxim Integrated MAX111BCPE+
- Part No.:
- MAX111BCPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX111BCPE+.pdf
- Description:
- IC ADC 14BIT SIGMA-DELTA 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:116
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Product details
Overview
MAX111BCPE+ from Maxim Integrated is a ±14-bit, 2-channel serial analog-to-digital converter (ADC) operating from a single +5V supply, delivering 0.05% linearity and 50Hz/60Hz rejection for precision differential or single-ended measurements in the ±1.5V or 0V–+1.5V input range. It features internal auto-calibration, 640µA active current, 4µA shutdown, and SPI/QSPI/MICROWIRE-compatible serial interface - ideal for panel meters and weigh scales requiring high resolution without external components.
For engineers reviewing the MAX111BCPE+ datasheet, MAX111BCPE+ pinout, MAX111BCPE+ application, or MAX111BCPE+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and two confirmed alternative parts with documented functional and application-level differences - all grounded in the official MAX110/MAX111 datasheet Rev 5 (11/98).
Technical Context
The MAX111BCPE+ implements a first-order sigma-delta architecture with integrated voltage-to-current conversion, integrator, comparator, and 1-bit DAC to achieve 14-bit resolution plus sign and overrange bits. Its oversampling clock (fOSC) supports ÷1/÷2/÷4 division modes and can be driven by either an internal RC oscillator (RCSEL = VDD) or external TTL/CMOS clock (RCSEL = GND).
It performs synchronous conversions at up to 50 samples/sec using 81,920 clock cycles per conversion (÷2 mode), with built-in 50Hz/60Hz notch rejection achieved via precise timing alignment to mains frequencies. Calibration is controlled via dedicated CAL bit in the 16-bit control register and supports offset-null and gain-correction under µP command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit + sign + overrange (16-bit serial output); enables ±16,383-count measurement with overflow detection. |
| Linearity (INL) | ±0.05% FSR (differential input); ensures ≤±8 LSB error across full ±1.5V range for calibrated operation. |
| Supply Current | 640 µA typical (active), 4 µA (power-down); supports battery-powered or low-quiescent systems. |
| Input Range | Differential: ±1.5V; single-ended: 0V to +1.5V; absolute pin voltage limited to 0V–1.8V (VDD − 3.2V). |
| Conversion Rate | Up to 50 conversions/sec (81,920 clocks @ 1MHz XCLK ÷2 mode); fixed synchronous timing, no variable latency. |
| Power Supply | +5V only (VDD = 4.75V to 5.25V); no negative rail required - simplifies power design vs. MAX110. |
| Reference Input | VREF+ = 1.5V, VREF− = 0V; differential reference voltage of 1.5V sets full-scale range and defines LSB = 91.5 µV. |
Pinout & Package
MAX111BCPE+ is housed in a 16-pin plastic DIP (Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch; lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1+ | Channel 1 positive analog input | Differential input terminal; accepts voltage up to VDD − 3.2V (1.8V max at +5V supply). |
| 2 REF− | Negative reference input | Ground reference for VREF+; must be connected to AGND (pin 13) for single-supply operation. |
| 3 REF+ | Positive reference input | Sets full-scale range; 1.5V nominal input yields ±1.5V differential span and 91.5 µV LSB. |
| 4 VDD | Positive supply input | +5V power rail (4.75V–5.25V); powers analog and digital sections; decoupling required. |
| 5 RCSEL | Oscillator mode select | Connect to GND for external XCLK; connect to VDD to enable internal RC oscillator (~1.3–2.8 MHz). |
| 6 XCLK | Oversampling clock I/O | Input for external clock (RCSEL = GND); output of internal RC oscillator (RCSEL = VDD); 1MΩ pull-up/down required in RC mode. |
| 7 SCLK | Serial interface clock | TTL/CMOS clock for DIN/DOUT; DC–2MHz compatible; data latched on rising edge (DIN), output valid on falling edge (DOUT). |
| 8 DIN | Serial data input | 16-bit control word input; MSB is NO-OP bit - '1' triggers configuration update and new conversion. |
| 9 DOUT | Serial data output | 16-bit result output (POL, OFL, D13–D0); high-impedance when CS is high; read on SCLK rising edge. |
| 10 BUSY | Conversion status indicator | Active-low open-drain output; goes low at conversion start, returns high at completion; used for interrupt or polling. |
| 11 CS | Chip-select input | Active-low enable for serial interface; must remain high during conversion; falling edge initiates data transfer. |
| 12 IN1− | Channel 1 negative analog input | Completes differential pair with IN1+; VIN1− > VIN1+ interpreted as negative input voltage. |
| 13 AGND | Analog ground | Dedicated ground return for analog inputs and reference; must be star-connected to minimize noise coupling. |
| 14 IN2+ | Channel 2 positive analog input | Second differential input channel; identical electrical specs and voltage limits as IN1+. |
| 15 IN2− | Channel 2 negative analog input | Completes second differential pair; supports independent 2-channel sequential sampling. |
| 16 GND | Digital ground | Return path for digital I/O (CS, SCLK, DIN, DOUT, BUSY); separate from AGND but tied at single point. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-calibration under µP control | Offset null and gain calibration executed via CAL bit in control register - eliminates manual trim components and drift compensation. |
| No external components required | Full functionality (reference, clock, filtering, conversion) achieved with only decoupling caps - reduces BOM count and layout area. |
| 50Hz/60Hz rejection | Fixed oversampling ratio and synchronous timing reject line-frequency interference without software averaging or external filters. |
| Two differential input channels | IN1+/IN1− and IN2+/IN2− support independent analog sensing paths - enables dual-sensor monitoring or multiplexed acquisition. |
| Low-power shutdown mode | 4 µA quiescent current with PD/PDX bits set - extends battery life in portable instrumentation between measurements. |
Applications
| Process Control Sensor Interface | Weigh Scale Load Cell Readout |
|---|---|
|
Use Scenario: Monitoring temperature, pressure, or flow transducers in industrial PLC I/O modules with isolated analog front-ends. IC Role / Device Role / Timing Role: Primary ADC digitizing low-frequency, high-precision sensor outputs; provides 14-bit resolution and 50Hz rejection for noisy factory environments. Use Value: Eliminates external op-amps and reference buffers while maintaining ±0.05% linearity - reduces component count and calibration complexity. |
Use Scenario: Reading mV/V output from strain-gauge load cells in commercial weighing terminals with battery backup. IC Role / Device Role / Timing Role: Differential-input ADC converting ratiometric bridge signals; uses internal reference and auto-calibration to track supply and sensor drift. Use Value: Achieves <±2 LSB error over temperature without trimming - improves repeatability and reduces factory calibration time. |
| Panel Meter Front-End | Data-Acquisition System Channel |
|
Use Scenario: Digitizing analog process variables (4–20mA, 0–10V) in benchtop or DIN-rail mounted digital panel meters. IC Role / Device Role / Timing Role: High-resolution ADC interfacing directly to microcontroller via SPI; handles both differential and single-ended inputs flexibly. Use Value: Single +5V supply and integrated reference simplify power architecture - enables compact, cost-optimized meter designs. |
Use Scenario: Modular DAQ module acquiring slow-varying physical parameters (voltage, thermocouple, RTD) in lab or field equipment. IC Role / Device Role / Timing Role: Dual-channel ADC providing synchronized or interleaved sampling; serial interface allows daisy-chaining multiple units. Use Value: 16-pin DIP package supports through-hole prototyping and repairability - critical for low-volume test instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 16-bit delta-sigma ADC, I²C interface, internal PGA (1–16×), 860SPS max, 2.0–5.5V supply. | Requires I²C host; lacks 50Hz/60Hz rejection; better resolution but lower noise immunity in AC-coupled industrial settings. | Select for systems needing programmable gain and I²C simplicity; avoid where mains-frequency rejection is mandatory. |
| MAX11602EEE+ | 14-bit SAR ADC, SPI interface, 250kSPS, ±2.5V input range, no internal reference, 1.25mA supply current. | Faster sampling but no auto-calibration or line-frequency rejection; requires external reference and precision op-amp drive. | Select for high-speed, low-latency acquisition; avoid when ultra-low power (<1mA) or self-calibrating operation is required. |
Compared with ADS1115IDGSR and MAX11602EEE+, the MAX111BCPE+ uniquely combines single-supply operation, built-in 50Hz/60Hz rejection, and µP-controllable auto-calibration in a through-hole DIP package - making it optimal for cost-sensitive, noise-prone, maintenance-friendly industrial measurement hardware.
Availability
MAX111BCPE+ is available at Aetrix Electronics and suitable for panel meters, weigh scales, and process control systems requiring stable component supply, long-term manufacturability, and legacy through-hole compatibility.
Supply support for MAX111BCPE+ 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 high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX110/MAX111 family was designed for low-cost, high-accuracy data acquisition in space-constrained, battery-operated, or remote-sensing systems - emphasizing integration, calibration autonomy, and robustness against power-line interference.
FAQ
What is the maximum input voltage range supported by the MAX111BCPE+?
The MAX111BCPE+ supports a differential input range of ±1.5V (i.e., IN1+ − IN1− or IN2+ − IN2− between −1.5V and +1.5V) and a single-ended range of 0V to +1.5V (with INx− tied to AGND). Absolute voltage at any analog input pin must stay within 0V to VDD − 3.2V (≤1.8V at +5V supply), per the Absolute Maximum Ratings table.
Does the MAX111BCPE+ require external calibration components?
No - the MAX111BCPE+ performs internal auto-calibration for both offset and gain errors under microprocessor control via the CAL bit in its 16-bit control register. No external trimpots, precision resistors, or reference buffers are needed, enabling fully self-contained high-accuracy measurement.
How does the MAX111BCPE+ achieve 50Hz/60Hz rejection?
The MAX111BCPE+ achieves 50Hz/60Hz rejection through deterministic oversampling timing: its sigma-delta modulator integrates input over precisely 81,920 clock cycles per conversion (in ÷2 mode), creating inherent notch filtering aligned to common AC line frequencies - no software averaging or external filters required.
Can the MAX111BCPE+ operate with an external crystal or clock source?
Yes - the MAX111BCPE+ accepts an external TTL/CMOS-compatible clock on the XCLK pin when RCSEL is tied to GND. The internal RC oscillator is disabled in this mode, and XCLK directly drives the oversampling clock (fOSC), supporting frequencies from DC to 1.25MHz per datasheet specifications.
What is the function of the BUSY pin on the MAX111BCPE+?
The BUSY pin on the MAX111BCPE+ is an active-low, open-drain status indicator that goes low at the start of conversion and returns high upon completion. It enables interrupt-driven or polled data-read operations - eliminating the need for fixed delay loops and improving system timing predictability.
MAX111BCPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX111BCPE+ FAQ
1.How can I place an order for MAX111BCPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX111BCPE+ 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 MAX111BCPE+ reliable?
The price and inventory of MAX111BCPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX111BCPE+ is usually 5 days.
3.What payment methods are accepted for MAX111BCPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX111BCPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX111BCPE+?
MAX111BCPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX111BCPE+ 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 MAX111BCPE+?
For technical support, including MAX111BCPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX111BCPE+ requirements.
6.How does Aetrix verify that MAX111BCPE+ is sourced from the original manufacturer or authorized distributors?
All MAX111BCPE+ 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 MAX111BCPE+ meets industry standards.
7.What is the process for return or replacement of MAX111BCPE+?
All MAX111BCPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX111BCPE+, 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 MAX111BCPE+ part is unused and in its original packaging.
Return procedure for MAX111BCPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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