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Analog Devices Inc./Maxim Integrated MAX1254BEUE+T
- Part No.:
- MAX1254BEUE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1254BEUE+T.pdf
- Description:
- IC ADC 12BIT PIPELINED 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,857
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Product details
Overview
MAX1254BEUE+T from Maxim Integrated is a stand-alone, 10-channel (8 external + 2 internal) 12-bit system monitor ADC with integrated 4.096V reference, remote diode temperature sensing capability, and autonomous alarm generation. It operates from a 4.5V–5.5V supply, achieves ±1 LSB INL, ±2.5°C internal temperature accuracy over –40°C to +85°C, and supports differential/singles-ended voltage or temperature inputs for server power rail and thermal monitoring.
For engineers reviewing the MAX1254BEUE+T datasheet, MAX1254BEUE+T pinout, MAX1254BEUE+T application, or MAX1254BEUE+T equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain support specific to the MAX1254BEUE+T - not the MAX1253 family or generic 12-bit ADCs.
Technical Context
The MAX1254BEUE+T implements a fully differential SAR ADC with on-chip track-and-hold, supporting unipolar (0 to VREF) and bipolar (±VREF/2) differential modes plus single-ended operation. Its autonomous scan sequencer independently monitors eight external analog channels (voltage or remote diode temperature), internal VDD/2, and internal die temperature without host intervention.
It features programmable digital averaging, fault-cycle counting before interrupt assertion, and AutoShutdown™ reducing supply current to <8µA at 50sps. The device uses SPI-compatible serial interface (SCLK, DIN, DOUT, CS) with push-pull/open-drain INT output and requires no external reference when using its internal 4.096V source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete steps for precise voltage and temperature digitization in multirail systems. |
| INL / DNL | ±1 LSB - ensures monotonicity and accurate end-point linearity critical for threshold-based alarm triggering. |
| Internal Temp Accuracy | ±2.5°C (–40°C to +85°C) - enables reliable die-temperature supervision without calibration in industrial servers. |
| Supply Range | 4.5V to 5.5V - matches standard 5V system rails and eliminates need for LDO in 5V-powered telecom/baseband cards. |
| Reference Voltage | 4.096V internal - provides exact 1mV/LSB scaling for voltage monitoring (e.g., 3.3V rail = 0x0CE8), simplifying firmware thresholds. |
| Max Sampling Rate | 94ksps (single channel, auto mode) - supports rapid response to transient overvoltage/overtemperature events in real time. |
| Standby Current | <8µA at 50sps - extends battery life in portable test equipment or remote data loggers with infrequent polling. |
Pinout & Package
MAX1254BEUE+T 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 applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN7 | Configurable analog input pair terminals | Support single-ended voltage sensing or differential remote diode temperature measurement (e.g., AIN0/AIN1 for MMBT3904 sensor). |
| REF | Reference voltage terminal | Left open when using internal 4.096V reference; connects to external reference source if required. |
| INT | Interrupt output | Push-pull or open-drain active-low signal indicating threshold violation - directly drives FPGA GPIO or microcontroller IRQ lines. |
| DOUT / DIN / SCLK / CS | SPI-compatible serial interface | Enables configuration and readback via 3-wire interface (no MISO/MOSI naming); CS reset clears serial state on high. |
| VDD / GND | Power supply pins | Require local 0.1µF ceramic decoupling; VDD must be stable within 4.5V–5.5V for guaranteed 12-bit performance. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous 10-channel monitoring | Eliminates host CPU polling overhead - continuously scans enabled channels and asserts INT only on threshold breach. |
| Programmable fault counter | Prevents false alarms by requiring configurable consecutive violations (e.g., 3×) before asserting INT - essential for noisy industrial environments. |
| Digital averaging filter | Reduces effective noise floor by up to 3 LSB RMS - improves stability of temperature readings from low-impedance diode sensors. |
| Remote diode sensing (≤10m) | Integrated bias current sources (4–66µA) enable direct connection to off-die transistors - no external current source IC needed. |
| Internal VDD/2 monitor | Measures half-supply voltage to infer full VDD level - provides rail supervision without external resistor divider, saving board space. |
Applications
| Server Power Rail Monitoring | Telecom Line Card Thermal Supervision |
|---|---|
|
Use Scenario: Real-time tracking of +12V, +3.3V, +5V, and +1.8V rails across dual-CPU server motherboards. IC Role / Device Role / Timing Role: Stand-alone ADC performs autonomous voltage sampling, compares against preloaded upper/lower thresholds, and triggers hardware interrupt on out-of-spec condition. Use Value: Enables immediate firmware response (e.g., throttling, logging, shutdown) without CPU polling latency - meets ASHRAE thermal compliance requirements. |
Use Scenario: Continuous die and ambient temperature monitoring on high-density 4G/5G baseband processing cards operating at 65°C ambient. IC Role / Device Role / Timing Role: Measures internal junction temperature and remote diode sensors on FPGAs, DSPs, and power amplifiers via differential AIN pairs. Use Value: ±2.5°C accuracy over –40°C to +85°C ensures safe thermal derating margins; AutoShutdown cuts idle current to <8µA during standby cycles. |
| Industrial Remote Data Logger | Network Equipment VDD Integrity Check |
|
Use Scenario: Battery-powered environmental sensor node logging voltage, temperature, and humidity across 10 distributed sites for 5+ years. IC Role / Device Role / Timing Role: Configured for low-duty-cycle scanning (50sps), averaging, and fault-counting to reject EMI-induced spikes on long sensor traces. Use Value: <8µA quiescent current at 50sps extends CR2032 battery life beyond 60 months; TSSOP package fits compact enclosure. |
Use Scenario: Verifying stable 5V supply integrity on carrier-grade Ethernet switches with >100 ASICs per chassis. IC Role / Device Role / Timing Role: Uses internal VDD/2 monitor to derive full VDD value - avoids resistor-divider drift and saves two precision resistors per monitored rail. Use Value: Eliminates external components while maintaining ±2.5% VDD accuracy - reduces BOM cost and layout area in high-channel-count systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar system-monitoring ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1254AEUE+ | Same 16-TSSOP package and pinout; ±1.0°C internal temp accuracy (vs. ±2.5°C) and tighter ±1 LSB INL spec. | Better suited for high-precision thermal control loops where sub-1°C repeatability is required (e.g., laser diode TEC control). | Select MAX1254AEUE+ when temperature accuracy is prioritized over cost; MAX1254BEUE+T offers optimal balance for general-purpose server monitoring. |
| ADS7953IRHBT | 12-bit, 16-channel SAR ADC with 1.8V–5.25V supply; no integrated temp sensor or autonomous alarm logic; requires external MCU for threshold checking. | Used in flexible data acquisition systems where host processor handles all alarm decisions and multiple voltage domains must be scanned. | Choose ADS7953IRHBT only if existing firmware already implements full threshold management and additional analog channels are needed beyond 10. |
Compared with MAX1254AEUE+, the MAX1254BEUE+T trades 1.5°C higher internal temperature error for broader availability and lower unit cost - making it preferred for volume telecom infrastructure. Versus ADS7953IRHBT, MAX1254BEUE+T eliminates host software dependency for alarm generation but sacrifices channel count and supply flexibility.
Availability
MAX1254BEUE+T is available at Aetrix Electronics and suitable for server farms, remote telecom networks, and industrial data loggers requiring stable component supply across extended product lifecycles.
Supply support for MAX1254BEUE+T 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 interrupt logic in one TSSOP device.
FAQ
What is the maximum operating temperature range for the MAX1254BEUE+T?
The MAX1254BEUE+T is specified for continuous operation from –40°C to +85°C ambient temperature. Its internal temperature sensor maintains ±2.5°C accuracy across this full industrial range, and all DC and dynamic specifications (INL, DNL, SINAD) are guaranteed over this interval per the official Maxim datasheet Rev 0.
Does the MAX1254BEUE+T require an external reference voltage?
No, the MAX1254BEUE+T includes a factory-trimmed 4.096V internal reference with ±30ppm/°C temperature coefficient. REF pin must be left open when using internal reference; connecting an external source disables the internal reference and requires proper bypassing per datasheet Figure 1.
How does the MAX1254BEUE+T handle remote temperature sensing?
The MAX1254BEUE+T provides programmable bias currents (4µA, 10µA, or 66µA) on AIN0–AIN7 to drive external diode-connected transistors (e.g., MMBT3904). It measures temperature differentially across paired inputs (AIN0/AIN1, etc.) with ±5°C accuracy at full range and supports cable lengths up to 10 meters in differential mode.
Can the MAX1254BEUE+T monitor both voltage and temperature on the same analog input channel?
Yes - each of the eight external channels (AIN0–AIN7) is software-configurable via the Input Configuration Register for either single-ended/differential voltage measurement or differential remote diode temperature sensing. Channel function is set independently per input, enabling mixed-mode monitoring in one device.
What is the purpose of the AutoShutdown™ feature in the MAX1254BEUE+T?
AutoShutdown™ dynamically scales supply current based on sample rate: 5mW at 94ksps, 190µA at 2ksps, and <8µA at 50sps. This allows the MAX1254BEUE+T to maintain full functionality while minimizing power in low-duty-cycle applications like battery-powered data loggers or sleep-mode telecom modules.
MAX1254BEUE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1254BEUE+T FAQ
1.How can I place an order for MAX1254BEUE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1254BEUE+T 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 MAX1254BEUE+T reliable?
The price and inventory of MAX1254BEUE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1254BEUE+T is usually 5 days.
3.What payment methods are accepted for MAX1254BEUE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1254BEUE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1254BEUE+T?
MAX1254BEUE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1254BEUE+T 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 MAX1254BEUE+T?
For technical support, including MAX1254BEUE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1254BEUE+T requirements.
6.How does Aetrix verify that MAX1254BEUE+T is sourced from the original manufacturer or authorized distributors?
All MAX1254BEUE+T 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 MAX1254BEUE+T meets industry standards.
7.What is the process for return or replacement of MAX1254BEUE+T?
All MAX1254BEUE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1254BEUE+T, 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 MAX1254BEUE+T part is unused and in its original packaging.
Return procedure for MAX1254BEUE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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