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Analog Devices Inc./Maxim Integrated MAX1239MEEE-T
- Part No.:
- MAX1239MEEE-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1239MEEE-T.pdf
- Description:
- 12-CHANNEL SERIAL, 12-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX1239MEEE-T from Maxim Integrated is a 12-bit, 12-channel, low-power 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 supports software-configurable unipolar/bipolar and single-ended/differential input modes for precision sensor and battery-powered measurement systems.
For engineers reviewing the MAX1239MEEE-T datasheet, MAX1239MEEE-T pinout, MAX1239MEEE-T application, or MAX1239MEEE-T equivalent, this page provides verified specifications, package mapping, functional context for embedded data acquisition, and validated alternative options - all derived from Maxim's official documentation and ordering information.
Technical Context
The MAX1239MEEE-T employs successive-approximation architecture with fully differential track-and-hold circuitry and a switched-capacitor DAC. Its internal 2.048V reference enables stable full-scale ranges of 0–2.048V (unipolar) or ±1.024V (bipolar), and it supports external references from 1V to VDD.
It operates in Fast Mode (400kHz) or High-Speed Mode (1.7MHz) I²C, with configurable channel-scan FIFO, AutoShutdown™ reducing current to <1µA at low throughput, and analog input bandwidth up to 5MHz for transient capture and undersampling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization. |
| Input Channels | 12 single-ended or 6 fully differential - supports multiplexed sensor arrays without external mux. |
| Sampling Rate | 94.4ksps max - enables real-time monitoring of fast transients in portable instrumentation. |
| INL / DNL | ±1 LSB - ensures monotonicity and minimal code-width deviation across temperature. |
| Supply Current | 670µA at 94.4ksps, 6µA at 1ksps - optimized for battery life in handheld medical or test equipment. |
| Reference Voltage | 2.048V internal (±0.04V over temp) - matches standard 12-bit full-scale resolution (2¹² × 0.5mV). |
| I²C Speed | 1.7MHz High-Speed Mode - reduces conversion readout latency by >4× vs. standard Fast Mode. |
Pinout & Package
MAX1239MEEE-T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), specified for -40°C to +85°C operation and compatible with standard surface-mount reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 14–16 | AIN0–AIN2, AIN8–AIN10 | Analog input channels - support single-ended or differential pairing per configuration register. |
| 4 | AIN3/REF | Configurable as analog input 3 or reference I/O - enables flexible reference routing without external pins. |
| 13 | AIN11/REF | Configurable as analog input 11 or reference I/O - extends reference flexibility for multi-rail systems. |
| 5 | SCL | I²C clock input - controls timing for both address and data transfer in Fast or High-Speed Mode. |
| 6 | SDA | I²C bidirectional data line - carries setup bytes, channel data, and acknowledges during read/write cycles. |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane. |
| 8 | VDD | Positive supply (2.7V–3.6V) - requires local 0.1µF ceramic bypass capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA between conversions - eliminates need for external power gating in intermittent sampling. |
| Internal FIFO with Channel-Scan Mode | Automatically sequences through up to 12 channels and buffers results - simplifies firmware for multi-sensor polling. |
| Software-Configurable Input Modes | Single-ended/differential and unipolar/bipolar selection via setup byte - enables one hardware design to serve multiple signal types. |
| 5MHz Analog Input Bandwidth | Supports accurate digitization of signals beyond Nyquist frequency - enables undersampling of RF or pulse waveforms. |
| Low Source Impedance Tolerance | Accurate sampling with ≤1.5kΩ source impedance - avoids mandatory op-amp buffering in many sensor interfaces. |
Applications
| Portable Medical Sensors | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Continuous vital-sign monitoring (ECG, SpO₂) in handheld patient monitors with limited battery capacity. IC Role / Device Role / Timing Role: Primary ADC acquiring multi-channel biopotential signals at ≥1ksps with low noise and calibrated DC accuracy. Use Value: 6µA shutdown current and 670µA active draw extend battery life to >100 hours; ±1 LSB INL ensures clinical-grade measurement repeatability. |
Use Scenario: Field-deployable multimeter or data logger capturing voltage, current, and temperature from industrial sensors. IC Role / Device Role / Timing Role: Central 12-channel digitizer interfacing thermocouples, RTDs, and voltage outputs via programmable gain stages. Use Value: 12-channel scan mode eliminates external multiplexer; 2.048V reference enables direct mV-to-code mapping for thermocouple cold-junction compensation. |
| Solar-Powered Remote Systems | System Supervision & PMIC Monitoring |
Use Scenario: Off-grid environmental station measuring solar irradiance, battery voltage, and panel temperature using energy harvesting. IC Role / Device Role / Timing Role: Low-quiescent ADC managing periodic wake-up sampling and deep-sleep state transitions. Use Value: AutoShutdown™ cuts idle current to sub-µA level; 2.7V minimum supply allows operation directly from partially charged Li-ion or supercapacitor banks. |
Use Scenario: Real-time monitoring of rail voltages, current sense, and thermal sensors in FPGA or SoC power management subsystems. IC Role / Device Role / Timing Role: Dedicated supervision ADC feeding telemetry to PMIC or host processor via I²C. Use Value: 1.7MHz I²C interface enables rapid polling of 12 rails without bus contention; internal reference removes dependency on unstable system VREF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 16-channel, SPI interface, 2.7V–5.25V supply, no internal reference - requires external 2.048V ref. | Higher channel count but lacks AutoShutdown™; better suited for SPI-based microcontrollers with tight timing control. | Select when SPI is preferred over I²C and board space allows external reference decoupling. |
| AD7949BCPZ-RL7 | 14-bit, 8-channel, SPI interface, 2.3V–5.5V supply, internal 2.5V ref, 1MSPS max rate - higher resolution but higher power (2.2mA). | Superior resolution and speed, but 3.7× higher active current limits use in ultra-low-power designs. | Select when 14-bit precision is required and power budget permits >2mA continuous draw. |
Compared with ADS7953IRHBT and AD7949BCPZ-RL7, the MAX1239MEEE-T uniquely balances 12-channel count, I²C simplicity, sub-µA shutdown, and integrated 2.048V reference - making it optimal for space-constrained, battery-sensitive, I²C-native systems where 12-bit fidelity suffices.
Availability
MAX1239MEEE-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered test equipment, and solar-powered remote systems requiring stable component supply, long-lifecycle availability, and guaranteed extended-temperature performance.
Supply support for MAX1239MEEE-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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX1236–MAX1239 family targets low-power, multichannel data acquisition in space- and energy-constrained systems - emphasizing integration (T/H, ref, clock, I²C), wide supply range, and robust performance across -40°C to +85°C.
FAQ
What is the operating supply voltage range for the MAX1239MEEE-T?
The MAX1239MEEE-T operates from a single supply of 2.7V to 3.6V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This range supports direct connection to common lithium-ion battery voltages and regulated 3.3V rails without level-shifting or additional regulators.
Does the MAX1239MEEE-T include an internal voltage reference, and what is its value?
Yes, the MAX1239MEEE-T features a factory-trimmed 2.048V internal reference, specified as 1.968V to 2.128V over temperature. This reference sets the full-scale input range and is accessible at the AIN3/REF and AIN11/REF pins when configured via the setup register.
How many analog input channels does the MAX1239MEEE-T support, and what configurations are available?
The MAX1239MEEE-T supports 12 analog input channels, configurable as either 12 single-ended inputs or 6 fully differential pairs. Input mode (single-ended/differential) and polarity (unipolar/bipolar) are selected via software-controlled configuration and setup bytes - no hardware changes required.
What I²C speeds does the MAX1239MEEE-T support, and how is High-Speed Mode enabled?
The MAX1239MEEE-T supports I²C Fast Mode (400kHz) and High-Speed Mode (1.7MHz). High-Speed Mode is activated by the master sending the HS-mode master code 00001XXX, followed by a repeated START and the device's slave address - enabling 94.4ksps throughput with minimal bus overhead.
What is the typical supply current of the MAX1239MEEE-T at different sampling rates?
At 94.4ksps, the MAX1239MEEE-T draws 670µA (typ); at 40ksps, 230µA (typ); at 10ksps, 60µA (typ); and at 1ksps, 6µA (typ). In AutoShutdown™ mode between conversions, current drops below 1µA - critical for extending battery life in intermittent-sampling applications.
MAX1239MEEE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 94.4k
- Number of Inputs:
- -
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-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:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1239MEEE-T FAQ
1.How can I place an order for MAX1239MEEE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1239MEEE-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 MAX1239MEEE-T reliable?
The price and inventory of MAX1239MEEE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1239MEEE-T is usually 5 days.
3.What payment methods are accepted for MAX1239MEEE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1239MEEE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1239MEEE-T?
MAX1239MEEE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1239MEEE-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 MAX1239MEEE-T?
For technical support, including MAX1239MEEE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1239MEEE-T requirements.
6.How does Aetrix verify that MAX1239MEEE-T is sourced from the original manufacturer or authorized distributors?
All MAX1239MEEE-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 MAX1239MEEE-T meets industry standards.
7.What is the process for return or replacement of MAX1239MEEE-T?
All MAX1239MEEE-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1239MEEE-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 MAX1239MEEE-T part is unused and in its original packaging.
Return procedure for MAX1239MEEE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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