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Analog Devices Inc./Maxim Integrated MAX1237MEUA+T
- Part No.:
- MAX1237MEUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1237MEUA+T.pdf
- Description:
- IC ADC 12BIT SAR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
MAX1237MEUA+T from Maxim Integrated is a low-power, 12-bit, 4-channel analog-to-digital converter with integrated track/hold, 2.048V internal reference, I²C-compatible 2-wire serial interface, and operation from 2.7V to 3.6V supply. It delivers 94.4ksps throughput, ±1 LSB INL, and <1µA shutdown current, enabling precision data acquisition in battery-powered portable instrumentation.
For engineers reviewing the MAX1237MEUA+T datasheet, MAX1237MEUA+T pinout, MAX1237MEUA+T application, or MAX1237MEUA+T equivalent, this page provides verified specifications, validated pin functions, confirmed use cases in handheld medical and solar-powered systems, and two technically documented alternative ADCs with explicit functional and parametric distinctions.
Technical Context
The MAX1237MEUA+T employs successive-approximation architecture with fully differential track/hold circuitry and software-configurable unipolar/bipolar, single-ended/differential input modes. Its internal 2.048V reference supports full-scale ranges of 0–2.048V (unipolar) or ±1.024V (bipolar), and it accepts external references from 1V to VDD.
It operates in Fast Mode (400kHz) or High-Speed Mode (1.7MHz) I²C, with slave address 0110100 (R/W bit configurable). Conversion timing is internally clocked at 2.8MHz or externally synchronized, with aperture delay as low as 30ns in HS mode and track/hold acquisition time of 800ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-fidelity signal digitization |
| INL / DNL | ±1 LSB - ensures monotonicity and ≤0.024% full-scale linearity error across temperature |
| Throughput Rate | 94.4 ksps - supports real-time sampling of signals up to ~3 MHz bandwidth (Nyquist) |
| Supply Current | 670 µA at 94.4 ksps; 0.5 µA in AutoShutdown™ - enables multi-year battery life in low-duty-cycle sensing |
| Reference Voltage | 2.048 V internal - provides stable, factory-trimmed scaling with 25 ppm/°C tempco |
| Analog Inputs | 4 single-ended or 2 fully differential channels - flexible sensor interfacing with channel-scan FIFO |
| Operating Temp | −40°C to +85°C - qualified for industrial and outdoor embedded environments |
Pinout & Package
MAX1237MEUA+T is housed in an 8-pin µMAX® package (3mm × 3mm, 0.5mm pitch), optimized for space-constrained portable designs. Pin functions are validated per Maxim's official pin description table and typical operating circuit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | AIN0–AIN2 | Analog input channels 0–2; support unipolar/bipolar, single-ended/differential configuration via setup register |
| 4 | AIN3/REF | Configurable terminal: analog input 3 or reference voltage source/sink (when SEL[2:1]=11) |
| 5 | SCL | I²C clock input - controls data transfer timing; supports Fast Mode (400kHz) and High-Speed Mode (1.7MHz) |
| 6 | SDA | I²C bidirectional data line - transmits conversion results and receives setup/configuration bytes |
| 7 | GND | Analog/digital ground reference - requires low-impedance connection to minimize noise coupling |
| 8 | VDD | Positive supply (2.7V–3.6V) - must be bypassed with 0.1µF ceramic capacitor near the pin |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1 µA between conversions - eliminates need for external power gating in intermittent-sampling systems |
| Internal Track/Hold | 800 ns acquisition time with 5 MHz small-signal bandwidth - captures fast transients without external sample-hold circuitry |
| I²C Interface Flexibility | Supports both 400 kHz Fast Mode and 1.7 MHz High-Speed Mode - adapts to host controller speed without protocol changes |
| Software-Configurable Input Modes | Single-ended/differential and unipolar/bipolar selection via setup byte - enables one hardware design to serve multiple sensor topologies |
| Internal FIFO with Channel-Scan | Automates sequential conversion across all 4 inputs - reduces MCU intervention and improves deterministic sampling latency |
Applications
| Handheld Portable Medical Devices | Battery-Powered Test Equipment |
|---|---|
|
Use Scenario: Continuous vital sign monitoring (ECG, pulse oximetry) in palm-sized diagnostic tools with coin-cell or Li-ion power. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor outputs; performs autonomous channel scanning and auto-shutdown between readings. Use Value: 670 µA active current and sub-µA shutdown enable >12-month battery life at 10s sampling intervals while maintaining 12-bit clinical-grade resolution. |
Use Scenario: Field-deployable multimeter or sensor calibrator requiring accurate DC/AC voltage and current measurement. IC Role / Device Role / Timing Role: Precision front-end digitizer with programmable input range and bipolar capability for true RMS and offset compensation. Use Value: ±1 LSB INL and 2.048V internal reference eliminate external precision reference components, reducing BOM count and layout area by 30%. |
| Solar-Powered Remote Monitoring | System Supervision & Diagnostics |
|
Use Scenario: Off-grid environmental sensor node powered by small PV panel and supercapacitor, logging temperature, humidity, and irradiance. IC Role / Device Role / Timing Role: Low-quiescent ADC acquiring from multiple analog sensors; uses internal FIFO and I²C HS-mode for burst reads during wake-up cycles. Use Value: 230 µA at 40 ksps and 6 µA at 1 ksps allow adaptive sampling - high rate during event-triggered capture, ultra-low rate during idle - maximizing energy harvesting efficiency. |
Use Scenario: Real-time voltage, current, and temperature monitoring inside industrial PLCs or telecom power supplies. IC Role / Device Role / Timing Role: Embedded supervision ADC feeding health metrics to system controller; configured for differential measurements to reject common-mode noise on PCB traces. Use Value: Fully differential input architecture and 70 dB SINAD suppress supply ripple and EMI, ensuring reliable fault detection even under noisy 24V rail conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-pin SOIC; 12-bit, 200 ksps; SPI interface only; no internal reference; requires external 2.5V ref | Requires redesign of digital interface and reference circuitry; higher active current (1.2 mA) | Select when higher throughput or SPI host compatibility outweighs board space and power penalties |
| MAX11607AUT+T | 8-pin SOT23; 12-bit, 94.4 ksps; I²C-compatible; 2.048V internal ref; but only 2 input channels and no FIFO | Lacks channel-scan automation and differential input support; limited multiplexing flexibility | Choose for simpler 2-channel systems where footprint and cost are prioritized over configurability |
Compared with ADS7822U and MAX11607AUT+T, the MAX1237MEUA+T uniquely combines 4-channel scan capability, integrated FIFO, and dual-mode I²C in an ultra-small µMAX package - making it optimal for compact, autonomous, battery-sensitive measurement nodes where firmware overhead and external component count must be minimized.
Availability
MAX1237MEUA+T is available at Aetrix Electronics and suitable for handheld portable medical devices, battery-powered test equipment, and solar-powered remote monitoring systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX1237MEUA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1236–MAX1239 family was designed for ultra-low-power, high-accuracy data acquisition in space- and energy-constrained portable systems - emphasizing integration of reference, T/H, clock, and I²C interface in minimal footprint.
FAQ
What is the maximum sampling rate supported by the MAX1237MEUA+T?
The MAX1237MEUA+T achieves a maximum throughput rate of 94.4 ksps when operating in High-Speed Mode (1.7 MHz I²C clock) with external clocking. This rate is sustained with full 12-bit accuracy and ±1 LSB INL performance across the −40°C to +85°C temperature range. Internal clock mode supports up to 51 ksps in channel-scan configuration.
Does the MAX1237MEUA+T require an external reference voltage?
No, the MAX1237MEUA+T includes a factory-trimmed 2.048V internal reference with 25 ppm/°C temperature coefficient, eliminating the need for external reference components in most applications. However, it also supports external references from 1V to VDD, allowing users to optimize full-scale range or improve absolute accuracy using a higher-precision external source.
How many analog input channels does the MAX1237MEUA+T support, and what configurations are available?
The MAX1237MEUA+T supports four analog input channels (AIN0–AIN3). These can be configured in single-ended mode (four independent 0–VREF inputs) or fully differential mode (two differential pairs: AIN0–AIN1 and AIN2–AIN3), with software-selectable unipolar or bipolar operation - all controlled via its I²C setup register without hardware changes.
What package type and pin count does the MAX1237MEUA+T use?
The MAX1237MEUA+T is supplied in an 8-pin µMAX® package (3mm × 3mm, 0.5mm pitch), a lead(Pb)-free and RoHS-compliant surface-mount package. Its pinout includes four analog inputs, I²C clock/data lines, power, and ground - matching the footprint of industry-standard 8-pin SOIC but occupying ~35% less board area.
Can the MAX1237MEUA+T operate from a 3.3V supply?
Yes, the MAX1237MEUA+T is explicitly specified for operation from 2.7V to 3.6V, making 3.3V its nominal supply voltage. At 3.3V, it delivers full performance: 94.4 ksps throughput, 70 dB SINAD, ±1 LSB INL, and 670 µA supply current - fully compatible with standard 3.3V microcontroller and logic ecosystems.
MAX1237MEUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 94.4k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1237MEUA+T FAQ
1.How can I place an order for MAX1237MEUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1237MEUA+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 MAX1237MEUA+T reliable?
The price and inventory of MAX1237MEUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1237MEUA+T is usually 5 days.
3.What payment methods are accepted for MAX1237MEUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1237MEUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1237MEUA+T?
MAX1237MEUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1237MEUA+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 MAX1237MEUA+T?
For technical support, including MAX1237MEUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1237MEUA+T requirements.
6.How does Aetrix verify that MAX1237MEUA+T is sourced from the original manufacturer or authorized distributors?
All MAX1237MEUA+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 MAX1237MEUA+T meets industry standards.
7.What is the process for return or replacement of MAX1237MEUA+T?
All MAX1237MEUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1237MEUA+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 MAX1237MEUA+T part is unused and in its original packaging.
Return procedure for MAX1237MEUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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