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Analog Devices Inc./Maxim Integrated MAX1272EUA+
- Part No.:
- MAX1272EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1272EUA+.pdf
- Description:
- IC ADC 12BIT SAR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:159
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Product details
Overview
MAX1272EUA+ from Maxim Integrated is a fault-protected, software-programmable 12-bit analog-to-digital converter (ADC) with multirange input capability, ±12V analog input fault protection, 87ksps throughput rate, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface - designed for industrial data-acquisition systems interfacing 4–20mA sensors directly to single 5V supplies.
For engineers reviewing the MAX1272EUA+ datasheet, MAX1272EUA+ pinout, MAX1272EUA+ application, or MAX1272EUA+ equivalent, this page delivers verified technical context, exact pin functions, real-world use-value per application, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX1272EUA+ employs successive approximation register (SAR) architecture with integrated track/hold (T/H), supporting four software-selectable unipolar/bipolar input ranges (±10V, ±5V, 0–10V, 0–5V) and internal 4.096V reference or external reference (2.40V–4.18V). Its T/H acquisition time is 2.85µs at 1.4MHz SCLK.
It implements AutoShutdown™ - automatically entering standby power-down between conversions - while retaining active overvoltage protection and reference buffer operation. Four programmable power-down modes (delayed/immediate standby and full power-down) enable current scaling from 1.5mA (converting) to 1µA (full power-down).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with no missing codes over –40°C to +85°C |
| Sampling Rate | 87ksps maximum throughput - supports real-time monitoring of fast industrial transients |
| Analog Input Ranges | Software-selectable: ±10V, ±5V, 0–10V, 0–5V - eliminates external signal conditioning for legacy sensor interfaces |
| Fault Protection | ±12V continuous analog input tolerance - enables direct connection to field wiring without external clamping |
| Reference Options | Internal 4.096V (±15ppm/°C tempco) or external 2.40V–4.18V - allows precision calibration or system-level reference sharing |
| Supply Current | 1.5mA at 87ksps (external ref), 0.2mA at 1ksps - enables battery-powered DAQ with >1-year runtime |
| INL / DNL | ±1 LSB integral nonlinearity, ±1 LSB differential nonlinearity - ensures accurate end-point linearity in closed-loop control |
Pinout & Package
The MAX1272EUA+ is housed in an 8-pin µMAX® package (3mm × 3mm, 0.5mm pitch), RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Serial clock input | Controls conversion timing and data transfer rate; supports up to 1.4MHz for 87ksps operation |
| 2 DIN | Serial data input | Accepts 8-bit control byte (START, RNG, BIP, PD, MODE bits) on rising edge of SCLK |
| 3 VDD | 5V supply input | Requires 0.1µF bypass capacitor to GND; operates from 4.75V–5.25V with ±0.5 LSB PSRR |
| 4 GND | Analog/digital ground | Single ground plane required; separates analog input path from digital noise sources |
| 5 AIN | Analog input channel | Accepts software-configured voltage ranges; ±12V fault-tolerant - survives open-wire or surge events |
| 6 REF | Reference buffer output / external reference input | Provides 4.096V internal reference (bypass with 1µF) or accepts 2.40V–4.18V external reference |
| 7 CS | Active-low chip select | Enables serial interface; falling edge initiates communication; high-Z DOUT when CS = high |
| 8 DOUT | Serial data output | Outputs 12-bit result MSB-first on falling edge of SCLK; three 8-bit reads required for full word |
Key Features
| Feature | Design Value |
|---|---|
| Four software-selectable input ranges | Eliminates external gain-switching circuitry and reduces BOM count in multi-sensor industrial modules |
| ±12V fault-protected analog input | Prevents latch-up or damage during field wiring faults - critical for unattended factory-floor deployments |
| AutoShutdown™ between conversions | Removes startup delay while maintaining reference buffer readiness - enables sub-millisecond wake-up latency |
| SPI/QSPI/MICROWIRE 3-wire compatibility | Direct interface to microcontrollers without level shifters or glue logic - simplifies PCB layout and firmware integration |
| Internal 4.096V reference with ±30ppm/°C tempco | Enables self-contained calibration in portable instruments without external reference ICs or trimming |
Applications
| Industrial Process Monitoring | Data-Acquisition Systems |
|---|---|
|
Use Scenario: Continuous voltage/current measurement from 4–20mA loop-powered pressure and temperature transmitters in PLC backplanes. IC Role / Device Role / Timing Role: Primary ADC digitizing analog sensor outputs with software-configurable range matching transmitter output type. Use Value: ±12V fault tolerance prevents field-wiring-induced failures; 87ksps sampling captures transient valve actuation events. |
Use Scenario: Modular rack-mounted DAQ units acquiring synchronized multi-channel analog signals in lab environments. IC Role / Device Role / Timing Role: High-accuracy 12-bit ADC with internal reference and low INL/DNL for calibrated measurement channels. Use Value: No missing codes and ±1 LSB INL ensure traceable metrology-grade readings across temperature range. |
| Robotics Joint Control | Battery-Powered Test Equipment |
|
Use Scenario: Real-time feedback acquisition from motor current sensors and position encoders in collaborative robot arms. IC Role / Device Role / Timing Role: Fault-protected ADC interfacing high-noise motor drive circuits while maintaining signal integrity. Use Value: ±12V input tolerance absorbs switching noise spikes; AutoShutdown™ cuts average current to <0.5mA during idle cycles. |
Use Scenario: Handheld multimeters and portable oscilloscope front-ends requiring long battery life and wide dynamic range. IC Role / Device Role / Timing Role: Low-power, multirange ADC enabling single-supply operation with selectable sensitivity per measurement mode. Use Value: 1.5mA active current and 1µA full power-down extend AA battery life to >18 months in intermittent-use instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multirange ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1273EUA+ | Same pinout and interface, but input ranges scaled to ±VREF/±VREF/2/0–VREF/0–VREF/2; no ±12V fault protection | Used where reference voltage defines full-scale (e.g., sensor signal conditioned to match VREF), not field-wire tolerant designs | Select MAX1273EUA+ when system uses shared precision reference and does not require ±12V analog input robustness |
| ADS7816U | 12-bit SAR ADC, 200ksps, SPI interface, no software-selectable ranges, no fault protection, requires external reference only | Targeted at high-speed, single-range applications (e.g., motor phase current sensing) with tight timing budgets | Choose ADS7816U when throughput >87ksps is mandatory and input signal conditioning is already implemented externally |
Compared with MAX1273EUA+, the MAX1272EUA+ provides unique ±12V fault tolerance and wider absolute input ranges, making it irreplaceable in direct-field-interface applications; versus ADS7816U, it trades raw speed for configurability, robustness, and integrated reference - reducing total system component count by up to 4 passive devices per channel.
Availability
MAX1272EUA+ is available at Aetrix Electronics and suitable for industrial process monitoring, robotics joint control, battery-powered test equipment, and data-acquisition systems requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX1272EUA+ 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 demanding industrial, medical, and communications applications.
The MAX1272EUA+ belongs to Maxim's fault-protected multirange ADC product line, engineered specifically for ruggedized data acquisition in harsh electrical environments with minimal external components.
FAQ
What is the maximum sampling rate of the MAX1272EUA+?
The MAX1272EUA+ achieves a maximum throughput rate of 87ksps when operated with a 1.4MHz serial clock and continuous CS assertion. This rate is sustained across all four software-selectable input ranges and both unipolar and bipolar modes. The device uses 16 clock cycles per conversion, and timing is validated over the full –40°C to +85°C operating range.
Does the MAX1272EUA+ support internal or external reference operation?
Yes, the MAX1272EUA+ supports both internal and external reference modes. In internal mode, it provides a trimmed 4.096V output at the REF pin (±15ppm/°C typical tempco). In external mode, it accepts 2.40V–4.18V applied to REF after disabling the internal buffer via the REF bit in the control byte. Reference selection is software-configurable per conversion.
What protection does the MAX1272EUA+ offer against analog input overvoltage?
The MAX1272EUA+ features built-in ±12V fault protection on the AIN pin - meaning it withstands continuous DC voltages from –12V to +12V without damage or latch-up. This protection remains active in all power-down modes and during VDD = 0V conditions. It limits input current to <2mA, eliminating need for external TVS diodes in many industrial wiring scenarios.
How does the MAX1272EUA+ handle power management between conversions?
The MAX1272EUA+ implements AutoShutdown™, automatically entering delayed standby power-down mode after each conversion. In this state, supply current drops to ~0.4mA (external ref) while keeping the reference buffer active - enabling zero-delay wake-up. Full power-down (1µA) and immediate/standby variants are software-selectable via the PD, MODE1, and MODE0 bits in the control byte.
Is the MAX1272EUA+ pin-compatible with any other Maxim ADCs?
Yes, the MAX1272EUA+ is pin-compatible with the MAX1273EUA+ - sharing identical 8-pin µMAX package, pinout, and serial interface protocol. However, the MAX1273EUA+ lacks ±12V fault protection and scales its input ranges relative to VREF rather than fixed ±10V/±5V, so direct substitution requires verification of input signal compliance and reference architecture.
MAX1272EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 87k
- Number of Inputs:
- 1
- Input Type:
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1272EUA+ FAQ
1.How can I place an order for MAX1272EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1272EUA+ 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 MAX1272EUA+ reliable?
The price and inventory of MAX1272EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1272EUA+ is usually 5 days.
3.What payment methods are accepted for MAX1272EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1272EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1272EUA+?
MAX1272EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1272EUA+ 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 MAX1272EUA+?
For technical support, including MAX1272EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1272EUA+ requirements.
6.How does Aetrix verify that MAX1272EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX1272EUA+ 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 MAX1272EUA+ meets industry standards.
7.What is the process for return or replacement of MAX1272EUA+?
All MAX1272EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1272EUA+, 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 MAX1272EUA+ part is unused and in its original packaging.
Return procedure for MAX1272EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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