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Analog Devices Inc./Maxim Integrated MAX1139LEEE+T
- Part No.:
- MAX1139LEEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1139LEEE+T.pdf
- Description:
- IC ADC 10BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,503
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Product details
Overview
MAX1139LEEE+T from Maxim Integrated is a 10-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 AutoShutdown™ reducing current to <1µA at low rates - optimized for battery-powered medical instruments and solar-powered remote systems.
For engineers reviewing the MAX1139LEEE+T datasheet, MAX1139LEEE+T pinout, MAX1139LEEE+T application, or MAX1139LEEE+T equivalent, key selection factors include its 12-channel multiplexed analog input architecture, software-configurable unipolar/bipolar and single-ended/differential modes, internal FIFO with channel-scan capability, and guaranteed operation across –40°C to +85°C.
Technical Context
The MAX1139LEEE+T employs successive-approximation ADC architecture with fully differential track/hold circuitry and integrated 2.048V voltage reference. Its 2-wire serial interface supports both Fast Mode (400kHz) and High-Speed Mode (1.7MHz), requiring explicit HS-mode master code initialization to achieve full 94.4ksps throughput.
It features 12 single-ended or 6 fully differential analog inputs (AIN0–AIN11), configurable via setup and configuration registers. Input range scales from 0 to VREF (unipolar) or ±VREF/2 (bipolar), with internal protection diodes allowing safe overvoltage tolerance up to GND−0.3V and VDD+0.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes for precision measurement in portable instrumentation. |
| 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 system rails, eliminating level-shifting in battery-powered designs. |
| Internal Reference | 2.048V ±40mV (±1.95%) - provides stable scaling for ratiometric measurements; externally adjustable from 1V to VDD. |
| Sampling Rate | 94.4ksps max (HS-mode) - supports real-time signal capture of audio-band and control-loop signals. |
| INL / DNL | ±1 LSB - ensures monotonicity and end-point linearity critical for closed-loop feedback and calibration-critical applications. |
| Supply Current | 670µA at 94.4ksps; 230µA at 40ksps; <1µA in AutoShutdown - extends battery life in handheld and remote deployments. |
Pinout & Package
The MAX1139LEEE+T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), designed for compact PCB layouts in space-constrained portable equipment.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 14–16 | AIN0–AIN2, AIN8–AIN10 | Analog input terminals - support single-ended or differential acquisition; internally protected to ±0.3V beyond supply rails. |
| 4, 13 | AIN3/REF, AIN11/REF | Configurable analog input/reference I/O - selectable as analog input or internal/external reference source/sink via setup register. |
| 5 | SCL | I²C clock input - accepts 400kHz (Fast Mode) or 1.7MHz (High-Speed Mode) clocks; requires external pull-up. |
| 6 | SDA | I²C bidirectional data line - open-drain output; requires external pull-up; supports ACK/NACK handshaking. |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane to maintain DC accuracy. |
| 8 | VDD | Positive supply input - bypass with 0.1µF ceramic capacitor to GND for noise suppression during conversion cycles. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA between conversions - eliminates need for external power-gating logic in intermittent-sampling systems. |
| Internal FIFO + Channel-Scan Mode | Automatically sequences through up to 12 channels and buffers results - simplifies firmware for multi-sensor polling without host intervention. |
| Software-Configurable Input Modes | Runtime-selectable unipolar/bipolar and single-ended/differential operation - enables one hardware design to serve diverse sensor types (e.g., thermocouples, RTDs, pressure bridges). |
| Low Source-Impedance T/H Support | Accurate sampling with ≤1.5kΩ source impedance - avoids mandatory op-amp buffering for many industrial and medical sensors. |
| Extended Temperature Range | Guaranteed performance from –40°C to +85°C - suitable for outdoor remote telemetry and clinical-grade portable devices. |
Applications
| Medical Instrumentation | Battery-Powered Test Equipment |
|---|---|
|
Use Scenario: Portable ECG monitor acquiring lead voltages from multiple electrodes with low power budget. IC Role / Device Role / Timing Role: 12-channel ADC digitizing analog front-end outputs; internal reference ensures stable gain across battery discharge cycle. Use Value: Enables >24-hour continuous operation on coin-cell or single Li-ion cell due to sub-µA shutdown current and 230µA @ 40ksps active draw. |
Use Scenario: Handheld multimeter measuring voltage, current, and resistance with auto-ranging. IC Role / Device Role / Timing Role: Central ADC interfacing with programmable gain amplifier and multiplexer; I²C interface simplifies microcontroller integration. Use Value: Reduces BOM count by integrating reference, clock, and T/H - eliminates 3–4 discrete components per channel vs. SAR ADC + external support. |
| Solar-Powered Remote Systems | Received-Signal-Strength Indicators |
|
Use Scenario: Off-grid environmental sensor node logging temperature, humidity, and irradiance using solar harvesting. IC Role / Device Role / Timing Role: Multi-channel data acquisition unit sampling sensors at adaptive rates; AutoShutdown synchronizes with energy availability. Use Value: Achieves reliable operation under variable light conditions via ultra-low idle current and 1.5µs acquisition time enabling rapid wake-and-measure cycles. |
Use Scenario: Cellular IoT module reporting LTE/5G RSSI alongside battery voltage and temperature. IC Role / Device Role / Timing Role: Simultaneous sampling of RF detector output and auxiliary analog monitors; internal FIFO prevents data loss during burst transmissions. Use Value: Delivers consistent 10-bit resolution across supply range (2.7–3.6V), ensuring RSSI accuracy remains unaffected by battery droop during transmission peaks. |
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, 16-pin QSOP package but with 4.096V internal reference and 4.5–5.5V supply range. | Targeted at 5V systems (e.g., industrial PLC modules); not suitable for 3.3V battery operation. | Select MAX1138EEE+ only when system uses 5V rail and requires higher reference headroom for bipolar sensor interfaces. |
| ADS7953IRHBT | 12-bit, 16-channel, SPI interface, 2.7–5.25V supply; no internal reference; higher 1MSPS rate but 1.5mA typical current. | Designed for high-speed industrial data loggers where SPI bandwidth and resolution outweigh power constraints. | Choose ADS7953IRHBT when 12-bit resolution and SPI timing determinism are required, accepting higher power and external reference complexity. |
Compared with MAX1138EEE+, the MAX1139LEEE+T enables direct 3.3V battery operation and tighter reference stability for ratiometric sensors; compared with ADS7953IRHBT, it trades raw speed and resolution for 3× lower active current and integrated reference - favoring longevity over throughput in portable edge nodes.
Availability
MAX1139LEEE+T is available at Aetrix Electronics and suitable for medical instrumentation, battery-powered test equipment, and solar-powered remote systems requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX1139LEEE+T 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 MAX1136–MAX1139 family was engineered for ultra-low-power, multi-channel data acquisition in portable and energy-harvested systems - prioritizing integration, supply flexibility, and guaranteed performance across extended temperature ranges.
FAQ
What is the maximum sampling rate of the MAX1139LEEE+T and how is it achieved?
The MAX1139LEEE+T achieves a maximum sampling rate of 94.4ksps in High-Speed Mode (HS-mode), which requires the master device to first issue the HS-mode master code (0000 1XXX) before sending the slave address. This mode mandates SCL clock frequency up to 1.7MHz and proper bus capacitance ≤400pF. In default Fast Mode, the rate is limited to 22.2ksps.
Does the MAX1139LEEE+T require an external reference, or is one built-in?
The MAX1139LEEE+T includes a factory-trimmed 2.048V internal reference with ±40mV tolerance (±1.95%) and 25ppm/°C temperature coefficient. It can also operate with an external reference applied to AIN3/REF or AIN11/REF pins, supporting voltages from 1V to VDD. The internal reference is enabled by default and consumes no extra current when used.
How many analog input channels does the MAX1139LEEE+T support, and what configurations are possible?
The MAX1139LEEE+T supports 12 analog input channels (AIN0–AIN11), configurable in either 12 single-ended or 6 fully differential pairs. Input mode (single-ended/differential) and polarity (unipolar/bipolar) are set via software-controlled setup and configuration bytes - no hardware changes needed to adapt to different sensor types.
What power-saving features does the MAX1139LEEE+T offer for battery-operated devices?
The MAX1139LEEE+T incorporates AutoShutdown™, reducing supply current to less than 1µA between conversions. At 40ksps, current drops to 230µA; at 1ksps, it falls to 6µA. Combined with single 2.7–3.6V supply operation and internal reference/clock, this eliminates external support components and significantly extends battery life in handheld and remote applications.
Is the MAX1139LEEE+T pin-compatible with other devices in the MAX1136–MAX1139 family?
Yes - the MAX1139LEEE+T shares identical 16-pin QSOP pinout and register map with MAX1138EEE+, differing only in internal reference voltage (2.048V vs. 4.096V) and supply range (2.7–3.6V vs. 4.5–5.5V). This allows drop-in replacement in 3.3V designs, provided reference and supply constraints are verified. MAX1136/MAX1137 use 8-pin µMAX and are not pin-compatible.
MAX1139LEEE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
MAX1139LEEE+T FAQ
1.How can I place an order for MAX1139LEEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1139LEEE+T 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 MAX1139LEEE+T reliable?
The price and inventory of MAX1139LEEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1139LEEE+T is usually 5 days.
3.What payment methods are accepted for MAX1139LEEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1139LEEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1139LEEE+T?
MAX1139LEEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1139LEEE+T 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 MAX1139LEEE+T?
For technical support, including MAX1139LEEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1139LEEE+T requirements.
6.How does Aetrix verify that MAX1139LEEE+T is sourced from the original manufacturer or authorized distributors?
All MAX1139LEEE+T 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 MAX1139LEEE+T meets industry standards.
7.What is the process for return or replacement of MAX1139LEEE+T?
All MAX1139LEEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1139LEEE+T, 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 MAX1139LEEE+T part is unused and in its original packaging.
Return procedure for MAX1139LEEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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