My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1239MEEE+
- Part No.:
- MAX1239MEEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1239MEEE+.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,387
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX1239MEEE+ from Maxim Integrated is a 12-bit, 12-channel, low-power analog-to-digital converter with I²C-compatible 2-wire serial interface, internal 2.048V reference, and single-supply operation from 2.7V to 3.6V. It delivers 94.4ksps throughput, ±1 LSB INL/DNL accuracy, and auto-shutdown current <1µA - enabling high-resolution sensing in battery-powered medical instruments and portable test equipment.
For engineers reviewing the MAX1239MEEE+ datasheet, MAX1239MEEE+ pinout, MAX1239MEEE+ application, or MAX1239MEEE+ equivalent, this page provides verified technical context, validated pin functions, confirmed I²C timing modes (Fast/High-Speed), real-world channel-scan behavior, and two documented alternative ADCs for 12-bit, 12-channel, I²C-based system designs.
Technical Context
The MAX1239MEEE+ 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 external reference inputs are accepted from 1V to VDD.
It operates in two I²C timing modes: Fast Mode (400kHz, ≤22.2ksps) and High-Speed Mode (1.7MHz, up to 94.4ksps), requiring explicit HS-mode master code (00001XXX) initiation. Conversion timing is clocked internally (2.8MHz) or externally via SCL, with aperture delay as low as 30ns in HS mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise analog measurement. |
| Input Channels | 12 single-ended or 6 fully differential - enables multi-sensor monitoring without external multiplexers. |
| Supply Voltage | 2.7V to 3.6V - compatible with Li-ion and 3.3V logic systems, eliminating level-shifting needs. |
| Throughput Rate | 94.4ksps (HS mode) - supports real-time sampling of signals up to ~3MHz bandwidth (SINAD >68dB). |
| DC Accuracy | ±1 LSB INL/DNL - ensures monotonicity and <0.024% full-scale linearity error across -40°C to +85°C. |
| Supply Current | 670µA at 94.4ksps; 6µA at 1ksps; <1µA in AutoShutdown - extends battery life in intermittent-sampling applications. |
| I²C Interface | Supports Fast Mode (400kHz) and High-Speed Mode (1.7MHz) - reduces host MCU overhead and bus occupancy. |
Pinout & Package
The MAX1239MEEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance up to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 14–16 | AIN0–AIN2, AIN8–AIN10 | Primary analog input terminals; configurable as single-ended or differential pairs with software-selectable polarity. |
| 4 | AIN3/REF | Shared analog input/reference node; selects internal 2.048V reference output or external reference input per setup register. |
| 13 | AIN11/REF | Secondary shared analog input/reference node; identical function to Pin 4, supporting dual-reference or extended channel use. |
| 5 | SCL | I²C clock input; controls data transfer timing and determines conversion clock source in external-clock mode. |
| 6 | SDA | I²C bidirectional data line; carries configuration bytes, conversion results, and acknowledges during read/write cycles. |
| 7 | GND | Analog/digital ground reference; must be connected to low-impedance system ground plane to maintain DC accuracy. |
| 8 | VDD | Positive supply input; requires local 0.1µF ceramic bypass capacitor to minimize noise coupling into ADC core. |
Key Features
| Feature | Design Value |
|---|---|
| Internal FIFO with Channel-Scan Mode | Automatically sequences through up to 12 channels without host intervention, reducing firmware overhead in multi-sensor systems. |
| Software-Configurable Input Modes | Single-ended/differential and unipolar/bipolar selection via setup byte - eliminates hardware reconfiguration for varying sensor types. |
| AutoShutdown™ Power Management | Reduces current to <1µA between conversions - critical for energy harvesting and solar-powered remote nodes. |
| Low Source Impedance Tolerance | Accurate sampling with analog sources up to 1.5kΩ - avoids mandatory op-amp buffering in many industrial sensor interfaces. |
| Integrated Track/Hold & Reference | Removes need for external T/H amplifier and precision voltage reference IC - simplifies BOM and layout for compact designs. |
Applications
| Handheld Portable Applications | Medical Instruments |
|---|---|
Use Scenario: Battery-powered handheld multimeter acquiring voltage, current, and temperature readings. IC Role / Device Role / Timing Role: Primary ADC capturing 12-channel sensor data with I²C streaming to ARM Cortex-M0+ MCU. Use Value: 94.4ksps throughput and 6µA idle current enable >100-hour battery life with sub-0.025% measurement linearity. |
Use Scenario: Portable ECG monitor digitizing 6 differential lead signals plus auxiliary biopotential sensors. IC Role / Device Role / Timing Role: 12-bit, 6-channel differential ADC providing synchronized sampling with programmable gain control. Use Value: ±1 LSB INL and internal 2.048V reference ensure clinical-grade signal fidelity without external calibration components. |
| Battery-Powered Test Equipment | Solar-Powered Remote Systems |
Use Scenario: Field-deployable environmental logger measuring temperature, humidity, pressure, and gas concentration. IC Role / Device Role / Timing Role: Multi-channel ADC interfacing to resistive, capacitive, and analog-output sensors via shared I²C bus. Use Value: Internal FIFO and channel-scan mode reduce MCU polling frequency by 80%, lowering active power consumption. |
Use Scenario: Solar-powered soil moisture and weather station transmitting data via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Low-quiescent ADC performing burst sampling only during sunlight hours to conserve supercapacitor energy. Use Value: AutoShutdown current <1µA extends sleep duration between measurements, maximizing energy budget per transmission cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multichannel, I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 4-channel, SPI interface, 3.3V-only supply, no internal reference. | Limited to lower-accuracy industrial monitoring where 256-level quantization suffices. | Select when cost sensitivity outweighs resolution needs and existing SPI infrastructure eliminates I²C integration effort. |
| MAX11612EEE+ | 12-bit, 12-channel, I²C interface, but uses 4.096V internal reference and requires 4.5V–5.5V supply. | Compatible with 5V microcontrollers and legacy 5V sensor rails; not suitable for 3.3V battery systems. | Choose for 5V designs needing identical channel count and interface, accepting higher supply voltage constraint. |
Compared with the MAX1239MEEE+, the ADS7822U trades resolution and interface compatibility for lower cost and simpler timing, while the MAX11612EEE+ matches resolution and channel count but mandates 5V operation - making the MAX1239MEEE+ the sole option for high-accuracy, low-voltage, I²C-based 12-channel sensing.
Availability
The MAX1239MEEE+ is available at Aetrix Electronics and suitable for handheld portable applications, medical instruments, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1239MEEE+ 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 was engineered for ultra-low-power, high-resolution data acquisition in resource-constrained embedded systems - prioritizing integrated functionality, minimal external components, and robust I²C interoperability.
FAQ
What is the maximum sampling rate supported by the MAX1239MEEE+?
The MAX1239MEEE+ achieves a maximum throughput rate of 94.4ksps when operating in I²C High-Speed Mode (1.7MHz SCL). This requires the host controller to first issue the HS-mode master code (00001XXX), then send a repeated START and slave address. In Fast Mode (400kHz), the maximum rate drops to 22.2ksps. The MAX1239MEEE+ internal clock runs at 2.8MHz, and conversion time is fixed at 10.6µs with external clocking.
Does the MAX1239MEEE+ support differential input configurations?
Yes, the MAX1239MEEE+ supports fully differential inputs across six independent channel pairs (e.g., AIN0–AIN1, AIN2–AIN3, etc.) via software configuration of the SGL/DIF bit in the setup byte. In differential mode, it accepts bipolar input ranges of ±1.024V (with internal 2.048V reference) and outputs two's complement codes. The device also supports single-ended operation on all 12 inputs with unipolar 0–2.048V range.
What reference voltage options are available for the MAX1239MEEE+?
The MAX1239MEEE+ features a factory-trimmed 2.048V internal reference (±0.5% initial accuracy, 25ppm/°C drift) and supports external reference voltages from 1V to VDD. Pins AIN3/REF (Pin 4) and AIN11/REF (Pin 13) serve dual roles: analog inputs or reference I/O, selected via the setup register. When using the internal reference, decoupling with a 0.1µF capacitor and 2kΩ series resistor is required at AIN3/REF per the typical operating circuit.
How does the AutoShutdown™ feature reduce power in the MAX1239MEEE+?
AutoShutdown™ powers down the MAX1239MEEE+ analog core between conversions, reducing supply current to less than 1µA at low throughput rates (e.g., 1ksps or below). At 10ksps, current drops to 60µA; at 40ksps, it is 230µA. This dynamic scaling is automatic and requires no host command - the device detects idle periods on the I²C bus and enters low-power state transparently, making the MAX1239MEEE+ ideal for duty-cycled sensor nodes.
Is the MAX1239MEEE+ pin-compatible with other devices in the MAX1236–MAX1239 family?
No, the MAX1239MEEE+ is not pin-compatible with the 8-pin µMAX-packaged MAX1236/MAX1237 variants. It shares the 16-pin QSOP footprint with the MAX1238EEE+, but differs in internal reference voltage (2.048V vs. 4.096V) and supply range (2.7V–3.6V vs. 4.5V–5.5V). Pin functions are identical across the QSOP variants (MAX1238/MAX1239), but electrical specifications and register defaults differ - direct substitution requires validation of reference, supply, and firmware configuration.
MAX1239MEEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 94.4k
- Number of Inputs:
- 6, 12
- 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:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1239MEEE+ FAQ
1.How can I place an order for MAX1239MEEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1239MEEE+ 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+ reliable?
The price and inventory of MAX1239MEEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1239MEEE+ is usually 5 days.
3.What payment methods are accepted for MAX1239MEEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1239MEEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1239MEEE+?
MAX1239MEEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1239MEEE+ 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+?
For technical support, including MAX1239MEEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1239MEEE+ requirements.
6.How does Aetrix verify that MAX1239MEEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1239MEEE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1239MEEE+?
All MAX1239MEEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1239MEEE+, 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+ part is unused and in its original packaging.
Return procedure for MAX1239MEEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1239MEEE+ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
