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Analog Devices Inc./Maxim Integrated MAX1039MEEE
- Part No.:
- MAX1039MEEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1039MEEE.pdf
- Description:
- 12-CHANNEL SERIAL 8-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:6,836
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Product details
Overview
MAX1039MEEE from Maxim Integrated is a low-power, 8-bit, 12-channel analog-to-digital converter (ADC) with integrated track/hold, 2.048V internal reference, I²C-compatible 2-wire serial interface, and operation from a single 2.7V–3.6V supply. It delivers 188ksps maximum sampling rate with 350µA supply current and supports software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes for precision sensor digitization in space-constrained systems.
For engineers reviewing the MAX1039MEEE datasheet, MAX1039MEEE pinout, MAX1039MEEE application, or MAX1039MEEE equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support tailored for battery-powered instrumentation and industrial monitoring designs.
Technical Context
The MAX1039MEEE uses successive-approximation architecture with internal switched-capacitor DAC and track/hold circuitry, enabling accurate 8-bit conversion with ±1 LSB INL and ±1 LSB DNL over –40°C to +85°C. Its 2.048V internal reference and 12-channel analog multiplexer support channel-scan mode with FIFO buffering for continuous acquisition.
It implements a high-speed I²C interface supporting both Fast Mode (400kHz) and High-Speed Mode (1.7MHz), with programmable slave address 1100101 and auto-shutdown reducing current to <1µA between conversions. Input bandwidth is 2.0MHz (–3dB), and acquisition time is 588ns with internal clock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for moderate-precision sensor and supervisory signal digitization. |
| Input Channels | 12 single-ended or 6 pseudo-differential - enables multi-sensor monitoring without external MUX, reducing BOM count. |
| Sampling Rate | 188ksps max - supports real-time capture of fast transients (e.g., motor current spikes, power rail dips) in portable equipment. |
| Supply Current | 350µA at 188ksps, 1µA in AutoShutdown - extends battery life in handheld medical or remote solar-powered devices. |
| Reference Voltage | 2.048V internal (±0.5 LSB TUE) - provides stable full-scale scaling without external reference component, simplifying layout. |
| Operating Supply | 2.7V to 3.6V - compatible with Li-ion/Li-Po battery discharge profiles and 3.3V system rails. |
| INL / DNL | ±1 LSB (max) - ensures monotonicity and predictable code transitions across temperature for reliable control-loop feedback. |
Pinout & Package
MAX1039MEEE is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), optimized for compact PCB layouts in portable instrumentation and embedded monitoring modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 5–7, 14–16 | AIN0–AIN2, AIN4–AIN7, AIN8–AIN10 | 12 dedicated analog inputs - configurable as single-ended or pseudo-differential pairs; each requires ≤1.5kΩ source impedance for <0.5 LSB error. |
| 4 | AIN3/REF | Shared analog input/reference terminal - selects internal 2.048V ref or external reference (1V–VDD) via SEL[2:1] bits in setup register. |
| 13 | AIN11/REF | 12th analog input or alternate reference terminal - used when AIN3/REF is assigned to channel; enables flexible ref routing. |
| 5 | SCL | I²C clock input - accepts 400kHz (Fast Mode) or 1.7MHz (High-Speed Mode) clocks; timing-critical for achieving 188ksps throughput. |
| 6 | SDA | I²C bidirectional data line - open-drain, requires external pull-up; carries configuration bytes, conversion results, and ACK/NACK signals. |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane to minimize noise coupling into ADC inputs. |
| 8 | VDD | Positive supply input - bypassed with 0.1µF ceramic capacitor to GND near pin to suppress switching noise affecting reference and conversion accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA between conversions - eliminates need for external enable control in low-duty-cycle sensing applications. |
| Internal FIFO + Channel-Scan Mode | 12-byte RAM buffer enables automatic round-robin sampling across all 12 channels - simplifies firmware by offloading sequencing logic. |
| Software-Configurable Input Modes | Single-ended/unipolar, single-ended/bipolar, pseudo-differential/unipolar, pseudo-differential/bipolar - adapts to diverse sensor outputs (e.g., thermocouples, RTDs, current shunts) without hardware changes. |
| 2.048V Internal Reference | 120ppm/°C tempco, ±0.5 LSB TUE - eliminates external reference IC while maintaining accuracy for 12-bit-equivalent system resolution in many use cases. |
| 2MHz Analog Input Bandwidth | Supports undersampling of signals up to 2MHz - enables detection of high-frequency anomalies (e.g., arc faults, vibration harmonics) beyond Nyquist limit of 188ksps. |
Applications
| Battery-Powered Medical Sensors | Solar-Powered Remote Monitoring |
|---|---|
|
Use Scenario: Continuous measurement of ECG lead voltages, temperature, and battery voltage in portable patient monitors. IC Role / Device Role / Timing Role: 12-channel ADC digitizes analog biosignals and system parameters with synchronized sampling; I²C interface enables low-pin-count connection to ultra-low-power MCU. Use Value: 350µA active current and <1µA shutdown current extend operating time on coin-cell or small Li-Po batteries; 2.048V reference ensures consistent gain calibration across temperature. |
Use Scenario: Environmental sensing (light, humidity, soil moisture) and panel voltage/current logging in off-grid solar telemetry nodes. IC Role / Device Role / Timing Role: Central ADC acquires data from multiple sensors during brief wake-up intervals; AutoShutdown minimizes quiescent drain between transmissions. Use Value: 12-channel integration reduces external components and PCB area; 2.7V–3.6V supply range matches solar charge controller output, avoiding LDO overhead. |
| Handheld Test Equipment | Industrial System Supervision |
|
Use Scenario: Multifunction handheld meters measuring DC voltage, current, and resistance using shared analog front-end. IC Role / Device Role / Timing Role: Configurable pseudo-differential inputs reject common-mode noise from probe leads; software-selectable bipolar mode supports bidirectional current sensing. Use Value: ±1 LSB INL ensures repeatable measurements across ranges; 188ksps sampling captures transient events like switch bounce or relay contact arcing. |
Use Scenario: Real-time monitoring of power supply rails, fan tachometers, and thermal sensors in PLC backplanes or server PSUs. IC Role / Device Role / Timing Role: ADC interfaces directly to microcontroller via I²C; FIFO and channel-scan mode automate periodic polling of 12 critical system parameters. Use Value: Internal 2.048V reference eliminates drift-related calibration drift in long-term deployments; QSOP package allows placement near noisy digital sections with proper grounding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 4-channel, SPI interface, 2.7V–5.25V supply, no internal reference - requires external 2.5V ref and level-shifting for 3.3V systems. | Limited to 4 inputs; lacks FIFO and AutoShutdown - increases firmware complexity and power management burden. | Choose only if SPI is mandated and channel count is sufficient; verify external ref stability meets system accuracy targets. |
| MAX1139EEE+ | 10-bit, 12-channel, same 16-pin QSOP, identical pinout and I²C interface, 2.048V ref, but 500µA active current at 100ksps. | Higher resolution improves dynamic range for low-level sensor signals, but higher current reduces battery life in duty-cycled systems. | Select when 10-bit resolution is required for improved SNR; confirm system can accommodate ~40% higher active current. |
Compared with ADS7822U, MAX1039MEEE offers 3× more channels, integrated reference, and autonomous power management; compared with MAX1139EEE+, it trades 2-bit resolution for 30% lower active current and identical footprint-ideal for cost- and power-sensitive 8-bit monitoring.
Availability
MAX1039MEEE is available at Aetrix Electronics and suitable for battery-powered medical instruments, solar-powered remote systems, and handheld test equipment requiring stable component supply with guaranteed extended industrial temperature support (–40°C to +85°C).
Supply support for MAX1039MEEE 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 demanding industrial, medical, and communications applications.
The MAX1036–MAX1039 family was designed for ultra-low-power, multichannel data acquisition in portable and energy-harvesting systems-emphasizing integration (ref, T/H, clock, I²C), small footprint, and intelligent power control.
FAQ
What is the internal reference voltage of the MAX1039MEEE, and how does it affect full-scale range?
The MAX1039MEEE features a factory-trimmed 2.048V internal reference. When enabled, this sets the full-scale analog input range to 0V–2.048V for unipolar single-ended operation or ±1.024V for bipolar pseudo-differential mode. This eliminates external reference components and maintains ±0.5 LSB total unadjusted error across –40°C to +85°C, directly defining the ADC's voltage-to-code mapping without calibration.
How many analog input channels does the MAX1039MEEE support, and what configurations are possible?
The MAX1039MEEE supports 12 analog input channels (AIN0–AIN11). These can be configured in software as 12 single-ended inputs or 6 pseudo-differential pairs. In pseudo-differential mode, one input serves as the '+' signal and another as the stable '–' reference; the '–' input must remain within ±0.1LSB of GND during conversion, enforced by external 0.1µF decoupling.
Does the MAX1039MEEE require an external clock, or does it include an internal oscillator?
The MAX1039MEEE includes an internal 2.25MHz oscillator for conversion timing, eliminating the need for an external clock source. It also supports external clocking via the SCL line for precise synchronization. The CLK bit in the setup register selects between internal (default) and external clock modes-internal mode simplifies design and reduces component count.
What is the maximum sampling rate of the MAX1039MEEE, and what interface mode is required to achieve it?
The MAX1039MEEE achieves its maximum sampling rate of 188ksps only in I²C High-Speed Mode (1.7MHz SCL), not Fast Mode (400kHz). To reach this rate, the master must first issue the HS-mode master code (00001XXX), receive a NACK, then send a repeated START and slave address. At 188ksps, supply current is 350µA with internal reference and external clock.
What package type and pin count does the MAX1039MEEE use, and is it RoHS-compliant?
The MAX1039MEEE is supplied in a 16-pin QSOP package (5.3mm × 10.2mm body, 0.635mm pitch) with lead(Pb)-free/RoHS-compliant finish. This surface-mount package supports automated assembly and provides adequate spacing for analog signal integrity in mixed-signal PCB layouts, with dedicated GND and VDD pins for noise isolation.
MAX1039MEEE 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:
- 8
- Sampling Rate (Per Second):
- 188k
- Number of Inputs:
- 12
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- Internal Oscillator
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1039MEEE FAQ
1.How can I place an order for MAX1039MEEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1039MEEE 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 MAX1039MEEE reliable?
The price and inventory of MAX1039MEEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1039MEEE is usually 5 days.
3.What payment methods are accepted for MAX1039MEEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1039MEEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1039MEEE?
MAX1039MEEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1039MEEE 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 MAX1039MEEE?
For technical support, including MAX1039MEEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1039MEEE requirements.
6.How does Aetrix verify that MAX1039MEEE is sourced from the original manufacturer or authorized distributors?
All MAX1039MEEE 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 MAX1039MEEE meets industry standards.
7.What is the process for return or replacement of MAX1039MEEE?
All MAX1039MEEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1039MEEE, 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 MAX1039MEEE part is unused and in its original packaging.
Return procedure for MAX1039MEEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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