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Analog Devices Inc./Maxim Integrated MAX1031BEEG+
- Part No.:
- MAX1031BEEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1031BEEG+.pdf
- Description:
- IC ADC 10BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,186
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Product details
Overview
MAX1031BEEG+ from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C error over –40°C to +85°C), 16-entry FIFO, and internal 2.5V reference. It supports 16 single-ended or 8 true differential input channels in unipolar/bipolar modes, operates from a single +3V supply, and interfaces via 10MHz SPI/QSPI/MICROWIRE. It is used in industrial data-acquisition systems requiring multichannel voltage and on-chip temperature monitoring.
For engineers reviewing the MAX1031BEEG+ datasheet, MAX1031BEEG+ pinout, MAX1031BEEG+ application, or MAX1031BEEG+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, package-validated pin functions, and two confirmed alternative parts for system-level trade-off analysis.
Technical Context
The MAX1031BEEG+ implements a fully differential successive-approximation register (SAR) ADC architecture with on-chip track-and-hold, supporting both single-ended and true differential inputs. Its internal oscillator enables autonomous conversion timing in clock modes 00, 01, and 10, while mode 11 accepts external SCLK up to 4.8MHz for deterministic 300ksps sampling.
It integrates a dedicated temperature-sensing path using the internal reference, delivering results in two's complement format at 1/8°C resolution. The 16-deep FIFO buffers conversion results and temperature readings independently, allowing burst acquisition without serial bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - Delivers 1024 discrete output codes for precise voltage quantization in embedded sensing. |
| Sampling Rate | 300ksps maximum - Enables real-time capture of signals up to 100kHz full-linear bandwidth (S/(N+D) > 68dB). |
| INL / DNL | ±1 LSB - Guarantees monotonicity and no missing codes across –40°C to +85°C, critical for closed-loop control. |
| Internal Reference | 2.50V ±20mV, ±30ppm/°C TC - Provides stable scaling without external components; used for all temperature measurements. |
| Temperature Accuracy | ±1.2°C (–40°C to +85°C) - Enables reliable board-level thermal monitoring without calibration. |
| Supply Current | 1.75mA at 300ksps (internal ref), 0.2–5μA shutdown - Supports low-power battery or energy-harvesting designs. |
| Digital Interface | 10MHz SPI/QSPI/MICROWIRE - Compatible with standard microcontroller peripherals; supports CPOL/CPHA = 0 or 1. |
Pinout & Package
The MAX1031BEEG+ is housed in a 28-pin, 5mm × 5mm TQFN package with exposed pad (EP), rated for –40°C to +85°C operation. The EP must be soldered to GND for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN15 | Analog Input Channels | 16 configurable inputs; AIN0–AIN15 available-supports 16 single-ended or 8 true differential pairs (e.g., AIN0/AIN1). |
| REF+/REF− | Reference Inputs | REF+ accepts 1.0V to VDD+50mV; REF− serves as negative reference or analog input AIN14; internal 2.5V ref always used for temp sensing. |
| CNVST/AIN15 | Conversion Start / Analog Input | Active-low CNVST pin doubles as AIN15; in clock mode 00/01, it triggers conversions without serial bus use. |
| SCLK, DIN, DOUT, CS | Serial Interface | 3-wire SPI-compatible interface; DOUT valid on falling SCLK edge; CS enables high-impedance DOUT when high. |
| EOC | End-of-Conversion Flag | Active-low open-drain output; goes low after conversion completion (except in clock mode 11, where it remains high). |
| VDD, GND, EP | Power & Ground | VDD = +2.7V to +3.6V; 0.1μF bypass required; EP must be connected to GND for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| 16-entry FIFO buffer | Stores up to 16 ADC results plus one temperature reading-enables background acquisition while host processes prior data. |
| True differential track-and-hold | Supports bipolar/unipolar differential inputs with common-mode rejection-eliminates DC offsets in noisy industrial environments. |
| Integrated temperature sensor | ±1.2°C accuracy over full industrial range-provides system thermal awareness without external sensors or calibration. |
| Four clock modes (CKSEL[1:0]) | Enables flexible timing: autonomous scan (mode 00), event-triggered per-channel (01), serial-initiated (10), or external-clock deterministic (11). |
| AutoShutdown™ | Reduces supply current to ≤5μA between conversions-extends battery life in portable data loggers and remote sensors. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous logging of pressure, flow, and temperature signals from multiple transducers in PLC-based control cabinets. IC Role / Device Role / Timing Role: Multichannel voltage digitizer with on-chip temperature compensation and FIFO buffering for deterministic scan sequencing. Use Value: 16-channel capability eliminates multiplexer switching latency; internal reference ensures consistent scaling across channels and temperature drift. |
Use Scenario: Compact wearable or bedside monitor acquiring ECG leads, respiration, and skin temperature simultaneously. IC Role / Device Role / Timing Role: Low-power, single-supply ADC with integrated temp sensor-reduces BOM count and PCB area in space-constrained medical devices. Use Value: 1.75mA active current and AutoShutdown enable >72-hour battery operation; ±1.2°C temp accuracy supports clinical-grade thermal trending. |
| Data Logging in Harsh Environments | Automated Test Equipment (ATE) |
Use Scenario: Field-deployed environmental sensor node measuring soil moisture, ambient temp, and solar irradiance over extended periods. IC Role / Device Role / Timing Role: Robust analog front-end with ESD-protected inputs (GND−0.3V to VDD+0.3V) and internal FIFO for burst capture during intermittent comms windows. Use Value: 300ksps sampling allows undersampling of transient events; FIFO prevents data loss during wireless transmission gaps. |
Use Scenario: Modular ATE slot card performing rapid channel scanning across DUT power rails, sensor outputs, and thermal feedback loops. IC Role / Device Role / Timing Role: High-throughput, software-configurable ADC with programmable scan modes and internal averaging for noise reduction. Use Value: Scan mode + internal averaging reduces host CPU overhead; 10MHz SPI interface enables fast result retrieval in multi-slot backplane systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel, temperature-integrated ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit, 500ksps, SAR ADC; no integrated temp sensor; requires external reference; 4-channel (vs. 16-channel) | Better resolution and speed but lacks on-chip temperature sensing and channel count-requires external multiplexer and sensor for same functionality. | Select when higher resolution (>12-bit) and faster throughput are prioritized over integration and BOM simplicity. |
| AD7928BRUZ | 12-bit, 1MSPS, 8-channel SAR ADC; no FIFO; no integrated temp sensor; 2.5V internal ref optional | Higher speed and resolution but no FIFO or temperature sensor-requires external timing logic and thermal monitoring circuitry. | Select when sampling rate >300ksps is mandatory and system already includes discrete temperature sensing and buffering. |
Compared with ADS8684IPWR and AD7928BRUZ, the MAX1031BEEG+ trades raw resolution and speed for integrated functionality-its 16-channel count, FIFO, internal temp sensor, and single-supply operation reduce system complexity and component count in cost- and space-sensitive industrial and medical designs.
Availability
MAX1031BEEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, and environmental data logging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1031BEEG+ 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 MAX1027/MAX1029/MAX1031 family was engineered for low-power, multichannel data acquisition in space-constrained systems needing integrated temperature sensing and deterministic conversion timing-targeting PLCs, portable instruments, and condition-monitoring nodes.
FAQ
What is the operating temperature range of the MAX1031BEEG+?
The MAX1031BEEG+ is specified for continuous operation from –40°C to +85°C. This extended industrial temperature range is validated across all electrical parameters-including INL, DNL, reference stability, and temperature sensor accuracy-and applies to both the 28-pin TQFN and 24-pin QSOP variants of the MAX1031.
Does the MAX1031BEEG+ require an external reference voltage?
No, the MAX1031BEEG+ includes a factory-trimmed 2.50V ±20mV internal reference with ±30ppm/°C temperature coefficient, which is used by default for all conversions and exclusively for temperature measurements. An external differential reference (REF+/REF−) may be applied, but doing so disables the internal reference and requires careful layout to maintain accuracy.
How many analog input channels does the MAX1031BEEG+ support?
The MAX1031BEEG+ supports 16 single-ended analog inputs (AIN0–AIN15) or 8 true differential input pairs (e.g., AIN0/AIN1, AIN2/AIN3, up to AIN14/AIN15). This is the highest channel count in the MAX1027/MAX1029/MAX1031 family-MAX1029 offers 12 single-ended/6 differential, and MAX1027 offers 8/4.
What is the purpose of the FIFO in the MAX1031BEEG+?
The MAX1031BEEG+ contains a 16-entry first-in/first-out (FIFO) buffer that stores ADC conversion results and temperature readings. It allows the device to perform multiple autonomous conversions-such as scanning all 16 channels-without host intervention, reducing serial bus contention and enabling deterministic timing in real-time systems.
Can the MAX1031BEEG+ measure temperature and voltage simultaneously?
Yes, the MAX1031BEEG+ can interleave temperature measurements with analog voltage conversions. A temperature reading occupies one FIFO entry and is always acquired using the internal 2.5V reference. When requested in scan mode, it is inserted into the FIFO sequence alongside voltage results, enabling synchronized thermal and electrical monitoring.
MAX1031BEEG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 8, 16
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1031BEEG+ FAQ
1.How can I place an order for MAX1031BEEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1031BEEG+ 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 MAX1031BEEG+ reliable?
The price and inventory of MAX1031BEEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1031BEEG+ is usually 5 days.
3.What payment methods are accepted for MAX1031BEEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1031BEEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1031BEEG+?
MAX1031BEEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1031BEEG+ 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 MAX1031BEEG+?
For technical support, including MAX1031BEEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1031BEEG+ requirements.
6.How does Aetrix verify that MAX1031BEEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1031BEEG+ 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 MAX1031BEEG+ meets industry standards.
7.What is the process for return or replacement of MAX1031BEEG+?
All MAX1031BEEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1031BEEG+, 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 MAX1031BEEG+ part is unused and in its original packaging.
Return procedure for MAX1031BEEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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