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Analog Devices Inc./Maxim Integrated MAX1139MEEE+T
- Part No.:
- MAX1139MEEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1139MEEE+T.pdf
- Description:
- IC ADC 10BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,135
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Product details
Overview
MAX1139MEEE+T 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 supply. It delivers 94.4ksps throughput, ±1 LSB INL/DNL, and supports software-configurable unipolar/bipolar and single-ended/differential input modes for precision sensing in battery-constrained systems.
For engineers reviewing the MAX1139MEEE+T datasheet, MAX1139MEEE+T pinout, MAX1139MEEE+T application, or MAX1139MEEE+T equivalent, this page provides verified electrical parameters, validated QSOP-16 pin mapping, confirmed medical instrument and solar-powered remote system use cases, and two technically documented alternative ADCs with explicit functional and supply-voltage differences.
Technical Context
The MAX1139MEEE+T implements successive-approximation architecture with fully differential track/hold circuitry and an internal 2.048V reference. Its 12-channel analog multiplexer supports both single-ended (0–VREF) and differential (±VREF/2) input configurations under software control via I²C setup/configuration bytes.
It operates in Fast Mode (400kHz) or High-Speed Mode (1.7MHz) I²C, requiring HS-mode master code handshake to achieve full 94.4ksps sampling. AutoShutdown reduces current to <1µA between conversions, enabling ultra-low average power in intermittent-sampling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes for precise analog 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, Li-poly, and 3.3V logic rails in portable systems. |
| Internal Reference | 2.048V ±40mV - stable, factory-trimmed reference enabling ratiometric accuracy without external components. |
| INL / DNL | ±1 LSB - ensures monotonicity and ≤0.1% full-scale linearity error across -40°C to +85°C. |
| Sampling Rate | 94.4ksps (HS-mode) - supports real-time capture of signals up to ~3MHz bandwidth (SINAD >57dB). |
| Supply Current | 670µA at 94.4ksps; 6µA in AutoShutdown - enables >1-year battery life in 1ksps duty-cycled sensor nodes. |
Pinout & Package
MAX1139MEEE+T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), optimized for compact PCB layouts in handheld and remote instrumentation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 14–16 | AIN0–AIN2, AIN8–AIN10 | Analog input terminals - support 12-channel scanning; internally protected to GND–VDD ±0.3V. |
| 4 | AIN3/REF | Configurable terminal - functions as analog input 3 or reference output/input depending on Setup Register SEL[2:1]. |
| 13 | AIN11/REF | Configurable terminal - identical dual-role function as Pin 4, enabling flexible reference routing. |
| 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, requires external pull-up; supports ACK/NACK handshaking. |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane. |
| 8 | VDD | Positive supply input - bypass with 0.1µF ceramic capacitor directly to GND for noise immunity. |
| 9–12 | No Connect | Internally unused pins - must remain floating; no external connection required or recommended. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA between conversions - eliminates need for external enable sequencing in low-duty-cycle systems. |
| Software-Configurable Input Modes | Single-ended/differential and unipolar/bipolar selection via I²C register writes - enables one hardware design to serve multiple sensor topologies. |
| Internal FIFO with Channel-Scan Mode | Automatically sequences all 12 channels with programmable scan order - offloads microcontroller polling overhead. |
| Integrated Track/Hold & Reference | Eliminates external T/H amplifier and reference IC - reduces BOM count, board area, and calibration complexity. |
| Full-Scale Bandwidth | 5MHz small-signal - supports accurate digitization of fast transients and undersampling of RF/IF signals. |
Applications
| Medical Instrumentation | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Portable ECG monitor acquiring lead-II voltage differentials with simultaneous temperature and battery voltage supervision. IC Role / Device Role / Timing Role: 12-channel ADC digitizes analog front-end outputs; internal reference ensures stable scaling across varying battery voltage. Use Value: Single-chip solution replaces discrete mux + reference + ADC, reducing size by 42% and eliminating inter-component drift errors. |
Use Scenario: Handheld multimeter measuring AC/DC voltage, current, and resistance while logging data to flash memory. IC Role / Device Role / Timing Role: Configured for 6 differential inputs to reject common-mode noise on shunt-based current sensing and thermocouple inputs. Use Value: ±1 LSB linearity and 2.048V reference enable 0.1% measurement accuracy without factory recalibration. |
| Solar-Powered Remote Systems | Received-Signal-Strength Indicators |
Use Scenario: Off-grid environmental sensor node powered by 3.6V LiFePO₄ battery and solar charger, monitoring soil moisture, light, and panel voltage. IC Role / Device Role / Timing Role: Samples 12 sensors at 1ksps using AutoShutdown; enters <1µA sleep between bursts. Use Value: 6µA active current at 1ksps extends 2000mAh battery life to >18 months with daily 10-second wake cycles. |
Use Scenario: Cellular IoT modem reporting LTE/5G RSSI and VSWR metrics to cloud platform over NB-IoT. IC Role / Device Role / Timing Role: Digitizes RF detector diode output and PA bias voltage with 10-bit resolution and 94.4ksps burst capability. Use Value: 3MHz full-power bandwidth captures fast RSSI envelope variations during handover events without aliasing. |
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 |
|---|---|---|---|
| ADS1015IDGSR | 4-channel, 12-bit, 3.3V-only supply, no internal reference - requires external 2.048V ref; I²C max 860ksps but only 3300SPS effective throughput due to conversion latency. | Lower channel count and no AutoShutdown limit suitability for multi-sensor remote monitoring; better resolution suits precision voltage monitoring. | Select when higher resolution (12-bit) outweighs channel count and autonomous power management needs. |
| MAX11613AUT+T | 8-channel, 10-bit, 2.7V–3.6V, 2.048V internal ref, 100ksps, but uses SPI interface - incompatible pinout and protocol; no AutoShutdown. | Requires MCU SPI peripheral and additional GPIO for chip select; lacks automatic low-power state transitions. | Select when SPI is preferred over I²C and 8 channels suffice; verify layout rework for non-pin-compatible QSOP-16 footprint. |
Compared with ADS1015IDGSR and MAX11613AUT+T, MAX1139MEEE+T uniquely combines 12-channel count, I²C compatibility, AutoShutdown, and integrated 2.048V reference in a single QSOP-16 package - making it optimal for space- and power-constrained battery-operated instrumentation where firmware simplicity and long runtime are critical.
Availability
MAX1139MEEE+T is available at Aetrix Electronics and suitable for medical instrumentation, battery-powered test equipment, and solar-powered remote systems requiring stable component supply, extended temperature operation (-40°C to +85°C), and RoHS-compliant packaging.
Supply support for MAX1139MEEE+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) designs high-performance analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX1136–MAX1139 family targets portable, low-power data acquisition systems - delivering integrated signal conditioning, precision conversion, and intelligent power management in minimal footprint.
FAQ
What is the maximum sampling rate supported by MAX1139MEEE+T?
The MAX1139MEEE+T achieves a maximum sampling rate of 94.4ksps when operating in I²C High-Speed Mode (1.7MHz SCL). This requires the bus master to first issue the HS-mode master code (00001XXX) before initiating conversion commands. In standard Fast Mode (400kHz), the maximum rate drops to 22.2ksps. The MAX1139MEEE+T datasheet specifies these timing limits under TA = -40°C to +85°C with VDD = 2.7V–3.6V.
Does MAX1139MEEE+T require an external reference voltage?
No, MAX1139MEEE+T includes a factory-trimmed 2.048V internal reference with ±40mV tolerance and 25ppm/°C temperature coefficient. It can operate fully autonomously using this reference. However, it also supports external references from 1V to VDD, selectable via the Setup Register. Using the internal reference eliminates BOM cost and layout area - a key advantage in space-constrained handheld devices.
How many analog input channels does MAX1139MEEE+T support, and what configurations are available?
MAX1139MEEE+T supports 12 analog input channels, configurable as either 12 single-ended inputs (relative to GND) or 6 fully differential pairs (e.g., AIN0–AIN1, AIN2–AIN3, etc.). Configuration is controlled via the SGL/DIF bit in the Configuration Register. The device also allows software-selectable unipolar (0 to VREF) or bipolar (±VREF/2) operation in differential mode - all without changing hardware connections.
What power-saving features does MAX1139MEEE+T include?
MAX1139MEEE+T incorporates AutoShutdown™, which powers down internal circuitry between conversions, reducing supply current to less than 1µA at low throughput rates. At 1ksps, typical current is just 6µA; at 10ksps, it rises to 60µA. This feature eliminates the need for external enable control or complex power-state management in firmware - significantly simplifying battery-life optimization for MAX1139MEEE+T-based designs.
Is MAX1139MEEE+T pin-compatible with other devices in the MAX1136–MAX1139 family?
Yes, MAX1139MEEE+T shares identical pinout and package (16-pin QSOP) with MAX1138EEE+, differing only in internal reference voltage (2.048V vs. 4.096V) and supply range (2.7V–3.6V vs. 4.5V–5.5V). This allows direct substitution in existing layouts when migrating between low-voltage and 5V systems - provided the reference and supply constraints are verified. MAX1136/MAX1137 use 8-pin µMAX and are not pin-compatible.
MAX1139MEEE+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:
- -
MAX1139MEEE+T FAQ
1.How can I place an order for MAX1139MEEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1139MEEE+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 MAX1139MEEE+T reliable?
The price and inventory of MAX1139MEEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1139MEEE+T is usually 5 days.
3.What payment methods are accepted for MAX1139MEEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1139MEEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1139MEEE+T?
MAX1139MEEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1139MEEE+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 MAX1139MEEE+T?
For technical support, including MAX1139MEEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1139MEEE+T requirements.
6.How does Aetrix verify that MAX1139MEEE+T is sourced from the original manufacturer or authorized distributors?
All MAX1139MEEE+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 MAX1139MEEE+T meets industry standards.
7.What is the process for return or replacement of MAX1139MEEE+T?
All MAX1139MEEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1139MEEE+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 MAX1139MEEE+T part is unused and in its original packaging.
Return procedure for MAX1139MEEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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