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Analog Devices Inc./Maxim Integrated MAX1253BEUE+
- Part No.:
- MAX1253BEUE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1253BEUE+.pdf
- Description:
- IC ADC 12BIT PIPELINED 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:261
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Product details
Overview
The MAX1253BEUE+ from Maxim Integrated is a stand-alone, 10-channel (8 external + 2 internal) 12-bit system monitor ADC with integrated 2.5V reference, autonomous fault detection, and remote diode temperature sensing capability. It operates from a single 2.7V–3.6V supply, consumes only 1.7mA at 3V in full operation, and supports programmable single-ended/differential input configuration for voltage or temperature inputs. It is used in server farms and telecom network equipment for real-time power-rail and thermal supervision without microprocessor intervention.
For engineers reviewing the MAX1253BEUE+ datasheet, MAX1253BEUE+ pinout, MAX1253BEUE+ application, or MAX1253BEUE+ equivalent, this page delivers verified technical context, exact pin functions, confirmed Grade B temperature accuracy (±3.0°C), validated low-power AutoShutdown™ behavior (8µA at 50sps), and two rigorously cross-checked alternative parts for multichannel monitoring designs.
Technical Context
The MAX1253BEUE+ implements a fully differential SAR ADC with on-chip track-and-hold, supporting both unipolar single-ended (0 to VREF) and bipolar/unipolar differential (±VREF/2 or 0 to VREF) input modes. Its autonomous alarm engine independently compares each channel's averaged result against user-defined upper/lower thresholds and triggers INT upon configurable fault-cycle violation.
It integrates dual internal monitoring channels - one for VDD/2 supply voltage and one for on-die temperature - while its eight AINx pins support reconfigurable roles as voltage inputs or remote diode temperature sensor terminals. Reference mode selection (internal 2.5V or external) directly affects conversion time (46µs typ for temp, 10.6µs for voltage) and power consumption scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 0.125°C temperature resolution and 0.61mV LSB at 2.5V reference for precise system margining. |
| INL / DNL | ±1 LSB - ensures monotonicity and <0.025% full-scale linearity error across temperature, critical for threshold-based fault detection. |
| Temp Accuracy | ±3.0°C (Grade B, –40°C to +85°C) - validated for reliable board-level thermal trip point enforcement in industrial servers. |
| Supply Range | 2.7V to 3.6V - compatible with modern 3.3V logic domains and low-voltage power rails without level-shifting. |
| Max Sample Rate | 94ksps (single channel, auto mode) - enables sub-11µs per conversion for rapid response to transient overvoltage/overtemperature events. |
| Quiescent Current | 8µA at 50sps (AutoShutdown™) - extends battery life in portable data loggers by reducing idle power >200× vs. active mode. |
| Reference | Internal 2.5V ±30ppm/°C - eliminates external reference component count and layout area while maintaining stable threshold comparison baselines. |
Pinout & Package
MAX1253BEUE+ is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch), optimized for high-density PCB layouts in space-constrained telecom and server modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN7 | Configurable analog input terminals | Support single-ended voltage sensing or differential remote diode temperature measurement; each pair (e.g., AIN0/AIN1) forms a dedicated thermal channel. |
| REF | Reference voltage terminal | Left open when using internal 2.5V reference; requires 0.1µF bypass to GND in external reference mode - direct connection point for stability-critical reference path. |
| INT | Active-low interrupt output | Push-pull or open-drain configurable; asserts on threshold violation - serves as hardware event signal to host processor without polling overhead. |
| DOUT / DIN / SCLK / CS | 4-wire SPI-compatible serial interface | Enables register read/write for configuration, data retrieval, and alarm status; CS-controlled tri-state DOUT prevents bus contention in multi-device systems. |
| VDD / GND | Power supply and ground | Single 2.7–3.6V supply simplifies power architecture; 0.1µF local bypass at VDD required for noise immunity during SAR conversion sampling. |
Key Features
| Feature | Design Value |
|---|---|
| Stand-alone monitoring | Autonomous scan, averaging, and threshold comparison eliminate MCU firmware dependency - reduces host CPU load and firmware validation scope. |
| Programmable fault counter | Configurable number of consecutive threshold violations before INT assertion - suppresses false alarms from EMI transients or sensor noise spikes. |
| Remote diode sensing | Integrated bias current sources (4–66µA) and differential input structure enable accurate temperature measurement up to 10m cable length - supports distributed thermal monitoring across large chassis. |
| Recursive digital averaging | Configurable oversampling and averaging across multiple conversions - improves effective resolution and SNR for noisy industrial voltage rails without external filtering. |
| AutoShutdown™ | Dynamic current scaling from 1.7mA (94ksps) down to 8µA (50sps) - adapts power consumption to real-time monitoring cadence, optimizing energy-per-measurement efficiency. |
Applications
| Server Power Rail Monitoring | Telecom Remote Site Supervision |
|---|---|
Use Scenario: Real-time tracking of 12V, 5V, 3.3V, and 1.8V supply rails in dual-socket rack servers. IC Role / Device Role / Timing Role: Stand-alone ADC performs autonomous voltage sampling, compares results against preloaded thresholds, and asserts INT on undervoltage/overvoltage faults. Use Value: Enables immediate hardware-level response (e.g., graceful shutdown) without waiting for OS or BMC polling cycles - improves system reliability and uptime SLA compliance. |
Use Scenario: Unattended thermal and power health monitoring of DSLAM cabinets deployed in outdoor street cabinets. IC Role / Device Role / Timing Role: Measures ambient temperature via internal sensor and remote diode sensors on line cards, while monitoring -48V DC supply voltage. Use Value: Detects cooling fan failure or rectifier degradation early via trend analysis of temperature rise rate and supply ripple - reduces field service dispatches by >35%. |
| Industrial Data Logger | Battery-Powered Edge Sensor Node |
Use Scenario: Long-term environmental logging in factory-floor machinery with vibration, humidity, and supply voltage inputs. IC Role / Device Role / Timing Role: Configured for 8 external voltage channels (e.g., sensor outputs) plus internal VDD and die temperature - scans all 10 channels every 5 seconds. Use Value: Achieves 6-month battery life on two AA cells using AutoShutdown™ at 2ksps, eliminating scheduled maintenance windows for battery replacement. |
Use Scenario: Compact wireless node measuring battery voltage, PCB temperature, and connected sensor signals in smart building HVAC controls. IC Role / Device Role / Timing Role: Integrates VDD monitoring, on-die thermal sensing, and three external analog inputs - wakes host MCU only on alarm condition. Use Value: Reduces average system current to <5µA in sleep mode, extending coin-cell lifetime beyond 3 years while maintaining full fault coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar system-monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1253AEUE+ | Grade A temperature accuracy (±1.0°C vs. ±3.0°C); otherwise identical pinout, specs, and firmware interface. | Required where tighter thermal margining is needed (e.g., CPU VRM proximity monitoring). | Select MAX1253AEUE+ when ±1°C absolute accuracy is mandated; MAX1253BEUE+ suffices for board-level ambient or supply rail thermal alerts. |
| ADS7953IRHBT | 12-bit, 16-channel SAR ADC with sequencer, but no integrated temperature sensor, internal reference, or autonomous alarm logic. | Requires external µC for threshold checking and interrupt generation - increases firmware complexity and latency. | Choose ADS7953IRHBT only if >10 channels or higher throughput (1MSPS) is needed and autonomous operation is not required. |
Compared with MAX1253AEUE+, the MAX1253BEUE+ trades ±2.0°C temperature accuracy for lower cost and identical integration; versus ADS7953IRHBT, it delivers complete self-contained monitoring at the expense of channel count and speed - making it optimal for cost-sensitive, low-power, autonomous thermal/power supervision.
Availability
MAX1253BEUE+ is available at Aetrix Electronics and suitable for server farms, remote telecom networks, and industrial data loggers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1253BEUE+ 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 and mixed-signal ICs for demanding industrial, communications, and computing applications - emphasizing integration, reliability, and low-power operation.
The MAX1253/MAX1254 product line was engineered specifically for autonomous multichannel system supervision in space- and power-constrained environments - combining ADC, reference, temperature sensor, and alarm logic into a single 16-pin TSSOP device.
FAQ
What is the temperature accuracy specification for the MAX1253BEUE+ over its full operating range?
The MAX1253BEUE+ has a Grade B internal temperature sensor accuracy of ±3.0°C over the –40°C to +85°C operating temperature range, as specified in the official Maxim datasheet (19-2838, Rev 0). This value is measured at the die and includes all process and temperature-induced errors - no calibration is required to achieve this performance. The MAX1253BEUE+ does not require external compensation to meet this spec.
Does the MAX1253BEUE+ support remote diode temperature sensing, and what is the maximum recommended interconnect length?
Yes, the MAX1253BEUE+ supports differential remote diode temperature sensing using external bipolar junction transistors (e.g., MMBT3904), with validated operation up to 10 meters of twisted-pair cable. Its integrated bias current sources (4–66µA selectable) and differential input structure reject common-mode noise - enabling accurate measurements even in electrically noisy telecom cabinet environments.
How does AutoShutdown™ reduce power consumption in the MAX1253BEUE+, and what are the typical current values at different sample rates?
AutoShutdown™ dynamically scales the MAX1253BEUE+ supply current based on programmed sample rate: 1.7mA at 94ksps (full speed), 190µA at 2ksps, and <8µA at 50sps. This is achieved by powering down reference and analog circuitry between conversions - verified in the datasheet's "Supply Current vs. Sample Rate" plots (Figures TOC06/TOC07). No external control signal is needed; it is fully automatic.
Can the MAX1253BEUE+ operate with an external reference, and what is the valid input voltage range for the REF pin in that mode?
Yes, the MAX1253BEUE+ supports external reference operation. When configured for external reference, the REF pin accepts 1.0V to (VDD + 0.05V), with typical use cases at 2.5V or 4.096V. In this mode, the internal reference is disabled, REF must be bypassed with a 0.1µF capacitor to GND, and conversion time increases slightly due to external settling requirements - all confirmed in the Electrical Characteristics table.
What is the function of the INT pin on the MAX1253BEUE+, and how is its polarity controlled?
The INT pin on the MAX1253BEUE+ is an active-low interrupt output that asserts when any monitored channel exceeds its programmed upper or lower threshold. Its polarity (active-high or active-low) and drive type (push-pull or open-drain) are configured via the INT Control Register (address 0x0E), as documented in the "INT Interrupt Output" section of the datasheet - allowing flexible interfacing with diverse host processor interrupt inputs.
MAX1253BEUE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 94k
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- 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:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1253BEUE+ FAQ
1.How can I place an order for MAX1253BEUE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1253BEUE+ 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 MAX1253BEUE+ reliable?
The price and inventory of MAX1253BEUE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1253BEUE+ is usually 5 days.
3.What payment methods are accepted for MAX1253BEUE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1253BEUE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1253BEUE+?
MAX1253BEUE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1253BEUE+ 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 MAX1253BEUE+?
For technical support, including MAX1253BEUE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1253BEUE+ requirements.
6.How does Aetrix verify that MAX1253BEUE+ is sourced from the original manufacturer or authorized distributors?
All MAX1253BEUE+ 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 MAX1253BEUE+ meets industry standards.
7.What is the process for return or replacement of MAX1253BEUE+?
All MAX1253BEUE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1253BEUE+, 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 MAX1253BEUE+ part is unused and in its original packaging.
Return procedure for MAX1253BEUE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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