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Analog Devices Inc./Maxim Integrated MAX1139MEEE+
- Part No.:
- MAX1139MEEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1139MEEE+.pdf
- Description:
- IC ADC 10BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,792
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Product details
Overview
MAX1139MEEE+ from Maxim Integrated is a 10-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 single supply. It delivers 94.4ksps throughput, ±1 LSB INL/DNL, and supports software-configurable unipolar/bipolar and single-ended/differential inputs - deployed in battery-powered medical instruments and solar-powered remote monitoring systems.
For engineers reviewing the MAX1139MEEE+ datasheet, MAX1139MEEE+ pinout, MAX1139MEEE+ application, or MAX1139MEEE+ equivalent, key selection criteria include its 12-channel multiplexed analog input architecture, 2.048V internal reference accuracy (±80mV over temperature), I²C high-speed mode (1.7MHz), AutoShutdown™ current reduction to <1µA, and QSOP-16 package compatibility with space-constrained portable instrumentation.
Technical Context
The MAX1139MEEE+ employs successive-approximation ADC architecture with fully differential track-and-hold circuitry and an internal 2.048V reference. Its 12 analog input channels (AIN0–AIN11) are software-selectable via configuration registers for unipolar or bipolar, single-ended or differential operation - enabling flexible signal conditioning without external components.
It supports two I²C operating modes: Fast Mode (400kHz) and High-Speed Mode (1.7MHz), with automatic mode switching triggered by master code. The device uses internal clocking or external SCL-synchronized conversion, with acquisition time dependent on source impedance and bus frequency - optimized for low-noise, low-power sampling in energy-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital output codes per conversion cycle. |
| Input Channels | 12-channel multiplexer - supports up to 12 single-ended or 6 fully differential analog inputs. |
| Internal Reference | 2.048V ±40mV (±2%) at +25°C - enables precise full-scale range definition without external voltage reference. |
| Supply Voltage | 2.7V to 3.6V - compatible with Li-ion and 3.3V system rails, eliminating level-shifting requirements. |
| Sampling Rate | 94.4ksps max (external clock, HS-mode) - sufficient for baseband sampling of signals up to ~3MHz bandwidth. |
| INL / DNL | ±1 LSB - ensures monotonicity and predictable transfer function across temperature (-40°C to +85°C). |
| Supply Current | 670µA at 94.4ksps; 230µA at 40ksps; <1µA in AutoShutdown™ - extends battery life in portable equipment. |
Pinout & Package
MAX1139MEEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), specified for surface-mount assembly and thermal performance in compact industrial and medical enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 4–8, 14–16 | AIN0–AIN10 | Analog input terminals - support software-configurable single-ended or differential acquisition across 12 channels. |
| 4 / 13 | AIN3/REF or AIN11/REF | Configurable analog input or reference I/O - selectable as input channel or internal/external reference source/sink. |
| 5 / 9 | SCL | I²C serial clock input - controls data timing; supports Fast Mode (400kHz) and High-Speed Mode (1.7MHz). |
| 6 / 10 | SDA | I²C bidirectional data line - transmits setup/configuration bytes and 10-bit conversion results. |
| 7 / 11 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane. |
| 8 / 12 | VDD | Positive supply input - requires 0.1µF ceramic bypass capacitor to GND for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA between conversions - critical for intermittent-sampling battery-powered systems. |
| Software-Configurable Input Modes | Single-ended/differential and unipolar/bipolar selection via setup byte - eliminates need for external op-amp reconfiguration. |
| Internal FIFO with Channel-Scan Mode | Enables autonomous sequential conversion across multiple channels - reduces host MCU polling overhead. |
| I²C High-Speed Mode Support | 1.7MHz clock rate - cuts conversion readout time by >4× vs. standard Fast Mode, improving real-time responsiveness. |
| Low Source Impedance Tolerance | Accurate sampling with ≤1.5kΩ analog source impedance - avoids mandatory buffer amplifiers in many sensor interfaces. |
Applications
| Medical Instrumentation | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Portable ECG monitor acquiring biopotential signals from dry electrodes with variable electrode-skin impedance. IC Role / Device Role / Timing Role: 12-channel ADC digitizing lead-off detection, respiration, and multi-lead ECG waveforms at 1ksps–10ksps rates. Use Value: Internal 2.048V reference and ±1 LSB INL ensure consistent amplitude calibration across units; AutoShutdown™ extends 24-hour runtime on coin-cell battery. |
Use Scenario: Handheld multimeter measuring DC voltage, current, and resistance in field service environments. IC Role / Device Role / Timing Role: Simultaneous sampling of shunt voltage, thermistor, and reference voltage for auto-ranging and offset compensation. Use Value: 12-channel mux eliminates external analog switches; software-configurable bipolar mode supports true zero-centered measurements without polarity reversal hardware. |
| Solar-Powered Remote Systems | Received-Signal-Strength Indicators |
Use Scenario: Off-grid environmental sensor node logging temperature, humidity, and PV panel voltage using energy harvesting. IC Role / Device Role / Timing Role: Low-quiescent-current ADC converting solar charge voltage, battery SOC, and ambient sensors every 5 minutes. Use Value: 6µA average current at 1ksps and <1µA shutdown current enable multi-year operation on 100mAh LiFePO₄ cell. |
Use Scenario: Cellular IoT module reporting LTE/5G RSSI and modem temperature for adaptive power control. IC Role / Device Role / Timing Role: Dedicated ADC channel measuring RF detector diode output and internal die temperature. Use Value: 2.048V reference stability (25ppm/°C) ensures RSSI accuracy remains within ±0.5dB over -40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit resolution, SPI interface, 2.7V–5.25V supply, no internal reference - requires external REF3020. | Higher precision needed; existing SPI infrastructure; no I²C bus available. | Select when 12-bit resolution and deterministic SPI timing outweigh I²C convenience and integrated reference. |
| MAX11139ETE+ | 10-bit, 12-channel, same 2.048V reference and I²C interface, but in 16-pin TQFN (3mm × 3mm) - smaller footprint, different thermal profile. | Space-constrained PCB layout; improved thermal dissipation required; no QSOP socket compatibility. | Choose for miniaturized designs where board area is critical and rework tolerance for TQFN is acceptable. |
Compared with ADS7953IRHBT and MAX11139ETE+, the MAX1139MEEE+ provides guaranteed I²C interoperability, factory-trimmed 2.048V reference, and QSOP-16 compatibility - simplifying qualification in portable medical and industrial instrumentation where supply chain continuity and legacy footprint reuse matter.
Availability
MAX1139MEEE+ is available at Aetrix Electronics and suitable for battery-powered test equipment, solar-powered remote systems, and medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for MAX1139MEEE+ 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 MAX1136–MAX1139 family was designed for ultra-low-power, multichannel data acquisition in portable and energy-harvesting systems - emphasizing integration, supply flexibility, and I²C simplicity over raw speed or resolution.
FAQ
What is the maximum sampling rate achievable with MAX1139MEEE+?
The MAX1139MEEE+ achieves a maximum sampling rate of 94.4ksps when operating in I²C High-Speed Mode (1.7MHz SCL) with external clocking. This rate assumes optimal bus loading (≤400pF), proper pull-up resistor sizing (≥750Ω), and correct master-code initialization to enter HS-mode. At lower rates (e.g., 40ksps), supply current drops to 230µA, supporting longer battery life in duty-cycled applications.
Does MAX1139MEEE+ require an external reference voltage?
No, the MAX1139MEEE+ includes a factory-trimmed 2.048V internal reference with ±40mV initial accuracy and 25ppm/°C temperature coefficient. It can operate directly using this reference for unipolar full-scale ranges of 0–2.048V or bipolar ranges of ±1.024V. An external reference (1V to VDD) may be applied only if higher precision or custom scaling is required - in which case the internal reference is disabled.
How many analog input channels does MAX1139MEEE+ support, and how are they configured?
The MAX1139MEEE+ supports 12 analog input channels (AIN0–AIN11), configurable via software-controlled setup and configuration registers. Users select single-ended (12 channels) or fully differential (6 channel pairs) operation, and unipolar or bipolar input range - all without external hardware changes. Channel scanning is supported via internal FIFO and SCAN[1:0] bits for autonomous multi-channel acquisition.
What package type is used for MAX1139MEEE+ and what are its key mechanical features?
The MAX1139MEEE+ uses a 16-pin QSOP (Quarter-Size Outline Package) with 0.635mm lead pitch, 5.3mm body width, and 10.2mm length. It is RoHS-compliant, lead-free, and rated for operation from -40°C to +85°C. The package supports standard reflow soldering profiles and provides adequate thermal dissipation for continuous 670µA operation in compact handheld enclosures.
Can MAX1139MEEE+ interface directly with a 3.3V microcontroller I²C bus?
Yes, the MAX1139MEEE+ operates from 2.7V to 3.6V and features I²C-compatible logic thresholds (VIH = 0.7×VDD, VIL = 0.3×VDD), making it fully interoperable with standard 3.3V microcontrollers. Its SDA/SCL pins tolerate 6V absolute maximum, and internal protection diodes prevent latch-up. Pull-up resistors ≥750Ω to 3.3V are recommended for reliable 400kHz or 1.7MHz communication.
MAX1139MEEE+ 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:
- 10
- Sampling Rate (Per Second):
- 94.4k
- Number of Inputs:
- 6, 12
- 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:
- -
MAX1139MEEE+ FAQ
1.How can I place an order for MAX1139MEEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1139MEEE+ 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 MAX1139MEEE+ reliable?
The price and inventory of MAX1139MEEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1139MEEE+ is usually 5 days.
3.What payment methods are accepted for MAX1139MEEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1139MEEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1139MEEE+?
MAX1139MEEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1139MEEE+ 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 MAX1139MEEE+?
For technical support, including MAX1139MEEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1139MEEE+ requirements.
6.How does Aetrix verify that MAX1139MEEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1139MEEE+ 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 MAX1139MEEE+ meets industry standards.
7.What is the process for return or replacement of MAX1139MEEE+?
All MAX1139MEEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1139MEEE+, 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 MAX1139MEEE+ part is unused and in its original packaging.
Return procedure for MAX1139MEEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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