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Analog Devices Inc./Maxim Integrated MAX1239EEE+
- Part No.:
- MAX1239EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1239EEE+.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:903
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Product details
Overview
MAX1239EEE+ from Maxim Integrated is a 12-bit, 12-channel, low-power analog-to-digital converter (ADC) 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/DNL accuracy, and supports software-configurable unipolar/bipolar, single-ended/differential inputs in industrial and portable sensing systems.
For engineers reviewing the MAX1239EEE+ datasheet, MAX1239EEE+ pinout, MAX1239EEE+ application, or MAX1239EEE+ equivalent, this page provides verified technical context, package mapping, real-world use cases, and validated alternative options for battery-powered instrumentation, system supervision, and remote monitoring designs.
Technical Context
The MAX1239EEE+ employs successive-approximation architecture with fully differential track-and-hold circuitry and a switched-capacitor DAC. Its 2-wire interface operates in Fast Mode (400kHz) or High-Speed Mode (1.7MHz), requiring explicit HS-mode master code entry to unlock full 94.4ksps sampling.
It features an internal 2.048V reference (±0.5% over temperature), supports external references from 1V to VDD, and includes an internal FIFO with channel-scan mode. Analog input range is configurable as 0–VREF (unipolar) or ±VREF/2 (bipolar) in differential mode, with 5MHz small-signal bandwidth and 22pF input capacitance.
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 - enables multi-sensor monitoring without external mux |
| Supply Voltage | 2.7V to 3.6V - compatible with Li-ion and 3.3V logic rails in portable systems |
| Throughput Rate | 94.4ksps (HS-mode) - supports real-time capture of transient events up to ~5MHz via undersampling |
| INL / DNL | ±1 LSB - ensures monotonicity and <0.025% full-scale linearity error across -40°C to +85°C |
| Reference Voltage | 2.048V internal (±0.5% initial, 25ppm/°C TC) - eliminates external reference component and layout area |
| Power Consumption | 670µA at 94.4ksps; <1µA in AutoShutdown™ - extends battery life in intermittent-sampling applications |
Pinout & Package
The MAX1239EEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), optimized for compact PCB layouts and thermal performance in space-constrained industrial modules.
| 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 analog input or reference I/O - selectable via setup register for flexible reference routing |
| 13 | AIN11/REF | Configurable analog input or reference I/O - enables dual-purpose pin for reference buffering or extended channel count |
| 5 | SCL | I²C clock input - controls data timing; must be pulled high; supports 400kHz (Fast) or 1.7MHz (High-Speed) modes |
| 6 | SDA | I²C bidirectional data line - requires external pull-up; handles address, command, and 12-bit conversion result transfer |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane for noise immunity |
| 8 | VDD | Positive supply - bypassed with 0.1µF ceramic capacitor near pin to suppress switching noise |
| 9–12 | No Connect | Internally unused - left floating; no external connection required |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces current to <1µA between conversions - eliminates need for external power-gating logic in low-duty-cycle systems |
| Internal FIFO with Scan Mode | Automatically sequences all 12 channels - simplifies firmware by offloading channel management from host MCU |
| Software-Configurable Input Modes | Single-ended/differential and unipolar/bipolar selection via register writes - enables one hardware design to serve multiple sensor types |
| 2-Wire Interface Timing Flexibility | Supports both Fast Mode (400kHz) and High-Speed Mode (1.7MHz) - allows optimization for noise immunity (slower) or speed (faster) |
| Integrated Track/Hold & Reference | Removes need for external T/H amplifier and precision voltage reference - reduces BOM count and board area by ≥3 components |
Applications
| Handheld Portable Applications | Medical Instruments |
|---|---|
Use Scenario: Battery-powered multimeter or environmental logger acquiring temperature, humidity, and pressure from multiple sensors. IC Role / Device Role / Timing Role: Central 12-channel ADC digitizing analog sensor outputs with synchronized sampling and I²C streaming to microcontroller. Use Value: 670µA active current and <1µA shutdown enable >1-year battery life in wake-on-event operation. | Use Scenario: Portable ECG or patient monitor measuring biopotential signals across multiple leads. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input ADC capturing differential electrode pairs with programmable gain and bipolar range. Use Value: ±1 LSB INL and 70dB SINAD ensure clinical-grade signal fidelity without external calibration. |
| Battery-Powered Test Equipment | System Supervision |
Use Scenario: Field-deployable power quality analyzer monitoring AC mains voltage, current, and harmonics. IC Role / Device Role / Timing Role: High-throughput ADC sampling at 94.4ksps with 5MHz input bandwidth to capture transients and support undersampling. Use Value: Internal 2.048V reference and 22pF input capacitance simplify anti-alias filter design and improve measurement repeatability. | Use Scenario: Industrial PLC or server motherboard monitoring supply voltages, temperatures, and fan speeds. IC Role / Device Role / Timing Role: Multi-point system health monitor interfacing directly to diverse analog sensors via configurable input modes. Use Value: 12-channel scan mode and I²C interface reduce host polling overhead and firmware complexity. |
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 reference and SPI host; higher channel count but no AutoShutdown™ | Preferred when SPI is standard in system and higher channel density is needed |
| AD7946BRUZ | 14-bit, 1-channel, SPI interface, 2.3V–5.5V supply, internal reference, 1MSPS | Higher resolution and speed but single-channel; lacks multiplexing and scan mode | Chosen for precision single-signal acquisition where 12-channel integration is unnecessary |
Compared with ADS7953IRHBT and AD7946BRUZ, the MAX1239EEE+ uniquely combines 12-channel flexibility, I²C simplicity, integrated reference, and sub-µA shutdown-making it optimal for resource-constrained, multi-sensor embedded systems where bus compatibility and power efficiency are critical.
Availability
MAX1239EEE+ is available at Aetrix Electronics and suitable for handheld portable applications, medical instruments, and battery-powered test equipment requiring stable component supply and long-term industrial lifecycle support.
Supply support for MAX1239EEE+ 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 industrial, automotive, and computing applications.
The MAX1236–MAX1239 family targets low-power, multichannel data acquisition in space- and energy-constrained systems-emphasizing integration, ease of use, and robustness across extended temperature ranges.
FAQ
What is the maximum sampling rate of the MAX1239EEE+ and under what conditions is it achieved?
The MAX1239EEE+ achieves a maximum sampling rate of 94.4ksps when operating in High-Speed Mode (1.7MHz I²C clock) with external clocking and the internal reference enabled. This rate requires the bus master to first issue the HS-mode master code (00001XXX), then perform a repeated START before sending the device address. Fast Mode limits throughput to 22.2ksps.
Does the MAX1239EEE+ require an external reference, or can it operate using only its internal reference?
The MAX1239EEE+ can operate using only its internal 2.048V reference, which is factory-trimmed and specified over temperature (±0.5% initial, 25ppm/°C TC). An external reference (1V to VDD) may be used for improved accuracy or custom full-scale ranges, but is not required-reducing BOM cost and layout complexity.
How many analog input channels does the MAX1239EEE+ support, and how are they configured?
The MAX1239EEE+ supports 12 analog input channels (AIN0–AIN11), configurable as either 12 single-ended inputs or 6 fully differential pairs. Configuration is controlled via the SGL/DIF bit in the setup register and channel-select bits (CS[3:0]) in the configuration register-enabling flexible sensor interfacing without external hardware changes.
What package type and pin count does the MAX1239EEE+ use, and are all pins electrically active?
The MAX1239EEE+ uses a 16-pin QSOP package. Pins 1–4, 5–8, 13–16 are electrically active (analog inputs, SCL, SDA, GND, VDD, REF); pins 9–12 are No Connect (NC) and must remain unconnected. The package footprint is standardized and compatible with automated assembly processes.
Can the MAX1239EEE+ interface directly with a 3.3V microcontroller I²C bus without level shifting?
Yes-the MAX1239EEE+ operates from 2.7V to 3.6V and specifies VIH = 0.7×VDD and VIL = 0.3×VDD, making it fully compatible with standard 3.3V I²C logic levels. Its SDA/SCL inputs tolerate up to 6V, and output VOL is ≤0.4V at 3mA sink, ensuring reliable communication with 3.3V microcontrollers without external level shifters.
MAX1239EEE+ 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:
- Active
- 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:
- -
MAX1239EEE+ FAQ
1.How can I place an order for MAX1239EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1239EEE+ 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 MAX1239EEE+ reliable?
The price and inventory of MAX1239EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1239EEE+ is usually 5 days.
3.What payment methods are accepted for MAX1239EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1239EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1239EEE+?
MAX1239EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1239EEE+ 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 MAX1239EEE+?
For technical support, including MAX1239EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1239EEE+ requirements.
6.How does Aetrix verify that MAX1239EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1239EEE+ 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 MAX1239EEE+ meets industry standards.
7.What is the process for return or replacement of MAX1239EEE+?
All MAX1239EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1239EEE+, 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 MAX1239EEE+ part is unused and in its original packaging.
Return procedure for MAX1239EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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