My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1139EEE+
- Part No.:
- MAX1139EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1139EEE+.pdf
- Description:
- IC ADC 10BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:798
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1139EEE+ from Maxim Integrated is a 10-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 single supply. It delivers 94.4ksps throughput, ±1 LSB INL/DNL, and supports software-configurable unipolar/bipolar and single-ended/differential input modes. It targets battery-powered medical instruments and solar-powered remote monitoring systems.
For engineers reviewing the MAX1139EEE+ datasheet, MAX1139EEE+ pinout, MAX1139EEE+ application, or MAX1139EEE+ equivalent, key selection criteria include its 12-channel multiplexed analog input architecture, 2.048V internal reference accuracy (±80mV over temperature), I²C high-speed mode support (1.7MHz), AutoShutdown™ current reduction to <1µA, and QSOP-16 package compatibility with space-constrained portable designs.
Technical Context
The MAX1139EEE+ employs successive-approximation ADC architecture with fully differential track-and-hold circuitry and a switched-capacitor DAC. Its analog front-end supports 12 single-ended or 6 fully differential input channels, configurable via CS[3:0] and SGL/DIF bits in the configuration byte.
It features dual clocking modes: internal oscillator (2.8MHz) or external I²C clock, enabling flexible timing control. The device uses an I²C slave address of 0110101 and supports Fast Mode (400kHz) and High-Speed Mode (1.7MHz), with distinct timing requirements for acquisition (800ns), conversion (10.6µs), and bus handshaking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes across full-scale range, sufficient for precision sensor digitization in portable instrumentation. |
| Input Channels | 12 single-ended or 6 fully differential - enables multi-sensor data acquisition without external multiplexer, reducing BOM and layout complexity. |
| Internal Reference | 2.048V ±80mV (–40°C to +85°C) - provides stable scaling for unipolar 0–2.048V or bipolar ±1.024V input ranges without external reference component. |
| Supply Current | 670µA at 94.4ksps; 6µA at 1ksps; <1µA in AutoShutdown™ - enables >1-year battery life in low-duty-cycle remote sensing applications. |
| I²C Interface | Up to 1.7MHz High-Speed Mode - supports rapid burst reads from multiple channels, minimizing host MCU active time and system power. |
| INL / DNL | ±1 LSB - ensures monotonicity and end-point linearity critical for closed-loop control and calibrated measurement systems. |
| Operating Temp | –40°C to +85°C - qualified for industrial and outdoor environmental deployment in medical and telemetry equipment. |
Pinout & Package
The MAX1139EEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), optimized for compact PCB layouts in handheld and remote systems. Pin functions are validated per Maxim's official datasheet Rev 6 (19-2334).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 4–8, 14–16 | AIN0–AIN11 | 12 analog input terminals - selectable as single-ended or differential pairs; internally protected to ±0.3V beyond VDD/GND rails. |
| 4 (AIN3/REF) | Configurable analog input or reference I/O | Shared terminal: functions as AIN3 in default mode; becomes reference output (2.048V) or external reference input when SEL[2:1]=11. |
| 13 (AIN11/REF) | Configurable analog input or reference I/O | Shared terminal: functions as AIN11; alternatively serves as secondary reference port for buffered reference distribution. |
| 5 (SCL) | I²C clock input | Master-generated clock signal - controls data transfer timing; supports both Fast Mode (400kHz) and High-Speed Mode (1.7MHz). |
| 6 (SDA) | I²C bidirectional data line | Open-drain interface requiring external pull-up - carries setup/configuration bytes, conversion results, and acknowledge bits. |
| 7 (GND) | Analog/digital ground reference | Common return path for analog inputs, reference, and digital logic - must be low-impedance and separated from noisy digital grounds. |
| 8 (VDD) | Positive supply input | 2.7V–3.6V single supply - requires local 0.1µF ceramic bypass capacitor to GND for noise suppression and stable conversion performance. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA between conversions - extends battery life in intermittent-sampling applications like RSSI monitoring. |
| Software-configurable input mode | Single-ended/differential and unipolar/bipolar selection via register bits - eliminates hardware rework when adapting to varying sensor output types. |
| Internal FIFO with channel-scan mode | Automates sequential conversion across up to 12 channels - simplifies firmware by offloading channel sequencing and timing management. |
| Integrated 2.048V reference | 25ppm/°C tempco, ±80mV absolute accuracy - removes need for external reference IC, saving board space and calibration effort in portable devices. |
| Low acquisition time | 800ns track/hold acquisition - supports accurate sampling of fast transients up to 5MHz small-signal bandwidth without external buffering. |
Applications
| Medical Instrumentation | Battery-Powered Test Equipment |
|---|---|
|
Use Scenario: Portable blood glucose meters and handheld ECG monitors acquiring signals from electrochemical sensors and biopotential electrodes. IC Role / Device Role / Timing Role: Primary ADC digitizing low-amplitude, high-impedance analog sensor outputs with programmable gain and filtering via microcontroller-controlled configuration. Use Value: 12-channel capability allows simultaneous acquisition of multiple biosignals; 2.048V reference enables precise 0–2.048V scaling aligned with common sensor output ranges. |
Use Scenario: Handheld multimeters and portable oscilloscope probes performing real-time voltage, current, and temperature measurements in field service. IC Role / Device Role / Timing Role: Core data acquisition engine interfacing with front-end signal conditioning and driving display/control MCU via I²C. Use Value: 94.4ksps throughput supports 10kHz waveform capture; AutoShutdown™ reduces average current to <10µA during standby, extending alkaline battery life beyond 18 months. |
| Solar-Powered Remote Systems | Received-Signal-Strength Indicators |
|
Use Scenario: Off-grid environmental sensor nodes powered by small solar panels and supercapacitors, measuring temperature, humidity, and irradiance. IC Role / Device Role / Timing Role: Low-power ADC converting outputs from multiple analog sensors into digital values for wireless transmission at scheduled intervals. Use Value: 6µA at 1ksps and <1µA shutdown current enable multi-year operation on energy-harvested power; 12-channel integration minimizes external components. |
Use Scenario: Cellular IoT modems and LoRaWAN gateways estimating RF link quality by digitizing RSSI voltage from RF transceivers. IC Role / Device Role / Timing Role: Dedicated RSSI monitor ADC operating in burst mode-triggered by RF event interrupts to capture instantaneous signal strength. Use Value: 10-bit resolution provides 0.5dB RSSI step size; I²C high-speed mode allows rapid readout before RF state changes, improving link adaptation accuracy. |
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 |
|---|---|---|---|
| MAX1138EEE+ | Same 12-channel QSOP-16 package and I²C interface, but 4.096V internal reference and 4.5–5.5V supply range. | Requires higher supply voltage; suited for 5V systems with legacy reference compatibility, not battery-powered 3.3V designs. | Select MAX1138EEE+ only if system operates at 5V and requires 4.096V reference scaling; incompatible with 2.7–3.6V battery rails. |
| ADS7822U | 12-bit, 4-channel, SPI interface, 2.7–3.6V supply, no internal reference - requires external 2.048V reference and separate SPI controller. | Lacks integrated reference and I²C compatibility; demands additional components and firmware overhead for multi-channel sequencing. | Choose ADS7822U only if 12-bit resolution is mandatory and SPI infrastructure already exists; adds cost and board area versus MAX1139EEE+'s integrated solution. |
Compared with MAX1138EEE+, MAX1139EEE+ enables direct use in 3.3V battery systems with tighter reference tolerance; compared with ADS7822U, it reduces BOM count by integrating reference, I²C interface, and 12-channel mux-lowering total system power and design risk.
Availability
MAX1139EEE+ is available at Aetrix Electronics and suitable for medical instrumentation, battery-powered test equipment, and solar-powered remote monitoring systems requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for MAX1139EEE+ 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-constrained systems-emphasizing integrated references, I²C simplicity, and extended temperature reliability.
FAQ
What is the maximum sampling rate of the MAX1139EEE+ and under what conditions is it achieved?
The MAX1139EEE+ achieves a maximum sampling rate of 94.4ksps when operating in I²C High-Speed Mode (1.7MHz clock) with external clocking and the internal reference enabled. This rate assumes optimal bus timing, minimal SDA/SCL capacitance (<400pF), and continuous conversion mode without AutoShutdown™ activation. At this rate, supply current is 670µA typical.
Does the MAX1139EEE+ require an external reference, or does it include one?
The MAX1139EEE+ includes a factory-trimmed 2.048V internal reference with ±80mV accuracy over –40°C to +85°C and 25ppm/°C temperature coefficient. An external reference (1V to VDD) may be used instead by configuring the setup register, but it is not required. The internal reference is enabled by default and eliminates the need for external reference ICs in most portable applications.
How many analog input channels does the MAX1139EEE+ support, and how are they configured?
The MAX1139EEE+ supports 12 analog input channels (AIN0–AIN11), configurable as either 12 single-ended inputs or 6 fully differential pairs. Configuration is performed via the SGL/DIF bit in the configuration byte and channel-select bits CS[3:0]. Input polarity (unipolar/bipolar) is independently set using the BIP/UNI bit in the setup byte, with bipolar mode only active in differential mode.
What package type and pin count does the MAX1139EEE+ use, and is it RoHS-compliant?
The MAX1139EEE+ is supplied in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with lead(Pb)-free and RoHS-compliant construction, indicated by the "+" suffix in the part number. This package supports standard surface-mount assembly and provides thermal and mechanical reliability across the –40°C to +85°C operating range.
Can the MAX1139EEE+ operate from a 3.3V supply, and what is its quiescent current in low-throughput scenarios?
Yes, the MAX1139EEE+ is specified for 2.7V to 3.6V single-supply operation and is fully functional at 3.3V. In low-throughput scenarios, supply current drops to 6µA at 1ksps and falls below 1µA in AutoShutdown™ mode-making it ideal for duty-cycled applications such as periodic sensor polling in battery-powered remote systems.
MAX1139EEE+ 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:
- 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:
- -
MAX1139EEE+ FAQ
1.How can I place an order for MAX1139EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1139EEE+ 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 MAX1139EEE+ reliable?
The price and inventory of MAX1139EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1139EEE+ is usually 5 days.
3.What payment methods are accepted for MAX1139EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1139EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1139EEE+?
MAX1139EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1139EEE+ 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 MAX1139EEE+?
For technical support, including MAX1139EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1139EEE+ requirements.
6.How does Aetrix verify that MAX1139EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1139EEE+ 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 MAX1139EEE+ meets industry standards.
7.What is the process for return or replacement of MAX1139EEE+?
All MAX1139EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1139EEE+, 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 MAX1139EEE+ part is unused and in its original packaging.
Return procedure for MAX1139EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1139EEE+ 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…
