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Analog Devices Inc./Maxim Integrated MAX1239EEE+T
- Part No.:
- MAX1239EEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1239EEE+T.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,726
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Product details
Overview
MAX1239EEE+T from Maxim Integrated is a 12-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 supply. It delivers 94.4ksps throughput, ±1 LSB INL/DNL, and supports software-configurable unipolar/bipolar and single-ended/differential input modes for precision sensor and battery-powered measurement systems.
For engineers reviewing the MAX1239EEE+T datasheet, MAX1239EEE+T pinout, MAX1239EEE+T application, or MAX1239EEE+T equivalent, this page provides verified electrical parameters, QSOP-16 package details, I²C timing modes (Fast/High-Speed), FIFO-based channel-scan capability, and real-world use context for portable medical instruments, solar-powered remote monitoring, and handheld test equipment.
Technical Context
The MAX1239EEE+T employs successive-approximation architecture with fully differential track-and-hold circuitry and a switched-capacitor DAC. Its 12-channel analog multiplexer enables flexible channel selection via CS[3:0] bits in the configuration register, supporting both single-ended (0–VREF) and differential (±VREF/2) input ranges under software control.
It integrates an internal 2.048V reference with 25ppm/°C temperature coefficient and supports external reference inputs from 1V to VDD. The I²C interface operates in Fast Mode (400kHz) or High-Speed Mode (1.7MHz), with dedicated HS-mode master code (00001XXX) required to enable maximum 94.4ksps sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization. |
| Input Channels | 12 single-ended or 6 fully differential - enables multi-sensor acquisition without external mux. |
| Supply Voltage | 2.7V to 3.6V - optimized for Li-ion and coin-cell battery-powered systems. |
| Throughput Rate | 94.4ksps (external clock, HS-mode) - supports real-time monitoring of fast transients. |
| INL / DNL | ±1 LSB - ensures monotonicity and <0.025% full-scale linearity error across temperature. |
| Internal Reference | 2.048V ±40mV (at +25°C) - matches 12-bit resolution step size (0.5mV/LSB) for simplified scaling. |
| Power Consumption | 670µA at 94.4ksps; 0.5µA in AutoShutdown™ - extends battery life in intermittent-sampling applications. |
| I²C Interface | Supports Fast Mode (400kHz) and High-Speed Mode (1.7MHz) - reduces data transfer latency vs. standard I²C. |
Pinout & Package
MAX1239EEE+T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 1.0mm height), RoHS-compliant and lead-free, rated for -40°C to +85°C operation. Pin spacing is 0.65mm; recommended PCB pad layout follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 4–8, 14–16 | AIN0–AIN10 / AIN11/REF | 12 analog input terminals; AIN11/REF serves dual role as channel 11 input or reference I/O per setup register. |
| 4 | AIN3/REF | Configurable terminal: analog input 3 or reference voltage source/sink depending on SEL[2:1]. |
| 5 | SCL | Serial clock input - controls I²C timing; must be pulled high; accepts 1.7MHz HS-mode clocks. |
| 6 | SDA | Serial data bidirectional line - open-drain, requires external pull-up; handles address, config, and conversion data. |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane. |
| 8 | VDD | Positive supply - bypass with 0.1µF ceramic capacitor placed adjacent to pin for noise suppression. |
| 9–13 | No Connect | Internally unused pins - left floating or grounded per layout best practice; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ mode | Reduces supply current to <0.5µA between conversions - eliminates need for external power gating in duty-cycled systems. |
| Internal FIFO with channel-scan | Enables autonomous sequential conversion of up to 12 channels without host intervention - lowers MCU overhead. |
| Software-configurable input topology | Single-ended/differential and unipolar/bipolar modes selected via setup byte - eliminates hardware reconfiguration. |
| Integrated 2.048V reference | Stable, factory-trimmed reference with 25ppm/°C drift - removes external reference IC and calibration burden. |
| 5MHz small-signal input bandwidth | Supports undersampling of kHz-range signals (e.g., vibration, ECG harmonics) without aliasing if filtered. |
| I²C slave address 0110101b | Fixed 7-bit address enables multi-device bus sharing; R/W bit selects read/write direction - simplifies firmware addressing. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG, temperature, and SpO₂ analog signals in handheld patient monitors. IC Role / Device Role / Timing Role: Primary ADC capturing 12 physiological channels with synchronized sampling and FIFO buffering. Use Value: 2.7V–3.6V operation and 670µA active current extend single-charge runtime; 2.048V reference ensures consistent 0.5mV/LSB scaling across sensors. |
Use Scenario: Long-term environmental monitoring (temperature, humidity, light) in solar-powered field nodes. IC Role / Device Role / Timing Role: Low-duty-cycle ADC triggered by timer interrupt, entering AutoShutdown™ between readings. Use Value: 0.5µA shutdown current minimizes quiescent drain; 12-channel support consolidates multiple sensor front-ends into one IC. |
| Solar Inverter Supervision | Industrial Handheld Testers |
|
Use Scenario: Real-time DC-link voltage, current, and temperature monitoring in residential solar inverters. IC Role / Device Role / Timing Role: High-accuracy auxiliary ADC for safety-critical supervision, operating alongside main controller. Use Value: ±1 LSB INL guarantees reliable fault detection thresholds; 5MHz input bandwidth captures switching ripple artifacts. |
Use Scenario: Multi-point voltage/current measurement in handheld multimeters and calibration tools. IC Role / Device Role / Timing Role: Core digitizer enabling simultaneous display of 4–12 sensor values with user-selectable ranges. Use Value: Software-configurable unipolar/bipolar and single-ended/differential modes eliminate range-switching hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953SRHBT | 12-bit, 16-channel, SPI interface, 2.7–5.25V supply, no internal reference - requires external REF3020. | Higher channel count but lacks I²C compatibility and integrated reference - increases BOM count and layout complexity. | Choose when SPI is preferred and higher channel density justifies added reference design effort. |
| AD7938BRUZ | 12-bit, 8-channel, parallel interface, 2.7–5.25V, internal 2.5V reference - no I²C, larger TSSOP-24 package. | Requires 12+ parallel data lines and separate BUSY/CONVST control - incompatible with space-constrained I²C microcontrollers. | Choose only for legacy parallel-bus systems where pin count and board area are not constrained. |
Compared with ADS7953SRHBT and AD7938BRUZ, the MAX1239EEE+T uniquely combines I²C simplicity, integrated 2.048V reference, QSOP-16 compactness, and AutoShutdown™-making it optimal for battery-operated, microcontroller-based instrumentation where firmware efficiency and component count matter.
Availability
MAX1239EEE+T is available at Aetrix Electronics and suitable for portable medical sensors, solar-powered remote systems, and handheld test equipment requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for MAX1239EEE+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 precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX1236–MAX1239 family was engineered for ultra-low-power, multichannel data acquisition in space- and energy-constrained systems - emphasizing integration (reference, T/H, clock, I²C), accuracy (±1 LSB), and flexible input configuration.
FAQ
What is the maximum sampling rate achievable with MAX1239EEE+T?
The MAX1239EEE+T achieves 94.4ksps maximum throughput when configured in I²C High-Speed Mode (1.7MHz SCL) with external clocking. This requires issuing the HS-mode master code (00001XXX) first, then a repeated START and slave address. In Fast Mode (400kHz), the rate drops to 22.2ksps. The internal clock limits sampling to 51ksps regardless of interface mode.
Does MAX1239EEE+T require an external reference voltage?
No, MAX1239EEE+T includes a factory-trimmed 2.048V internal reference with 25ppm/°C temperature coefficient, eliminating the need for external reference components in most applications. However, it also supports external references from 1V to VDD applied at AIN3/REF or AIN11/REF, offering flexibility for custom full-scale ranges or improved stability.
How many analog input channels does MAX1239EEE+T support, and what configurations are possible?
MAX1239EEE+T supports 12 analog input channels. These can be used in single-ended mode (12 inputs referenced to GND) or fully differential mode (6 differential pairs). Input topology (single-ended/differential) and polarity (unipolar/bipolar) are software-configurable via the setup and configuration registers - no hardware changes needed.
What package type and pin count does MAX1239EEE+T use?
MAX1239EEE+T uses a 16-pin QSOP (Quarter-Size Outline Package) with 0.65mm pitch, measuring 5.3mm × 10.2mm. It is RoHS-compliant and lead-free (+T suffix). Pins 9–13 are No Connect; AIN0–AIN10 occupy pins 1–3, 4–8, and 14–16; AIN11/REF is on pin 13; SCL, SDA, GND, and VDD are on pins 5, 6, 7, and 8 respectively.
Can MAX1239EEE+T operate from a 3.3V supply, and what is its typical supply current?
Yes, MAX1239EEE+T is specified for 2.7V to 3.6V operation and is commonly used with 3.3V rails. At 94.4ksps with internal reference enabled, typical supply current is 670µA. At lower rates (e.g., 10ksps), current drops to 60µA; in AutoShutdown™ mode between conversions, it falls below 0.5µA - ideal for battery longevity.
MAX1239EEE+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:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 94.4k
- Number of Inputs:
- 6, 12
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- 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:
- -
MAX1239EEE+T FAQ
1.How can I place an order for MAX1239EEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1239EEE+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 MAX1239EEE+T reliable?
The price and inventory of MAX1239EEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1239EEE+T is usually 5 days.
3.What payment methods are accepted for MAX1239EEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1239EEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1239EEE+T?
MAX1239EEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1239EEE+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 MAX1239EEE+T?
For technical support, including MAX1239EEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1239EEE+T requirements.
6.How does Aetrix verify that MAX1239EEE+T is sourced from the original manufacturer or authorized distributors?
All MAX1239EEE+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 MAX1239EEE+T meets industry standards.
7.What is the process for return or replacement of MAX1239EEE+T?
All MAX1239EEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1239EEE+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 MAX1239EEE+T part is unused and in its original packaging.
Return procedure for MAX1239EEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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