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Analog Devices Inc./Maxim Integrated MAX1037LEKA+T
- Part No.:
- MAX1037LEKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8
- Datasheet:
-
MAX1037LEKA+T.pdf
- Description:
- IC ADC 8BIT SAR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,160
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Product details
Overview
MAX1037LEKA+T from Maxim Integrated is an 8-bit, 4-channel, low-power analog-to-digital converter (ADC) with integrated track/hold, 2.048V internal reference, I²C-compatible 2-wire serial interface, and single-supply operation from 2.7V to 3.6V. It delivers 188ksps maximum sampling rate with only 350µA supply current and supports software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes for portable medical instrumentation and battery-powered test equipment.
For engineers reviewing the MAX1037LEKA+T datasheet, MAX1037LEKA+T pinout, MAX1037LEKA+T application, or MAX1037LEKA+T equivalent, key selection considerations include its 8-pin SOT23 package, ±2 LSB total unadjusted error, AutoShutdown™ power management, internal 2.048V reference, and compatibility with I²C fast mode (400kHz) and high-speed mode (1.7MHz).
Technical Context
The MAX1037LEKA+T employs successive-approximation register (SAR) architecture with integrated track/hold capacitor and switched-capacitor DAC. Its analog front-end supports four single-ended or two pseudo-differential inputs, with input multiplexer routing controlled via configuration registers over the I²C bus.
Conversion timing is synchronized either to an internal 2.25MHz clock or externally supplied SCL signal; acquisition time depends on source impedance and clock mode, with hold mode initiated on the eighth falling edge of the slave address in external clock mode. The device operates across –40°C to +85°C and features internal reference buffering with 120ppm/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR ADC - provides 256 discrete output codes for moderate-precision sensing applications. |
| Total Unadjusted Error | ±2 LSB - defines worst-case deviation between ideal and actual transfer function without calibration. |
| Sampling Rate | 188 ksps max - enables real-time monitoring of signals up to ~200 kHz full-linear bandwidth. |
| Supply Current | 350 µA at 188 ksps - allows continuous high-throughput operation in energy-constrained systems. |
| Reference Voltage | 2.048 V internal - matches common microcontroller ADC reference domains and simplifies layout with no external reference needed. |
| I²C Interface Speed | Up to 1.7 MHz (high-speed mode) - reduces data readout latency and supports rapid channel scanning. |
| Input Configuration | 4 single-ended or 2 pseudo-differential channels - offers flexibility for sensor interfacing while maintaining compact 8-pin footprint. |
Pinout & Package
MAX1037LEKA+T is housed in an 8-pin SOT23 package (3.0mm × 1.7mm × 1.3mm), optimized for space-constrained portable designs. The package requires standard reflow soldering per JEDEC J-STD-020 and includes RoHS-compliant lead finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN0 | Analog input channel 0 - accepts unipolar or bipolar signals referenced to GND or AIN3/REF. |
| 2 | AIN1 | Analog input channel 1 - software-selectable as single-ended or pseudo-differential '+' input. |
| 3 | AIN2 | Analog input channel 2 - shares same configuration flexibility as AIN0–AIN1; supports channel-scan mode. |
| 4 | AIN3/REF | Configurable terminal - functions as analog input 3 or internal/external reference I/O depending on SEL[2:1] bits. |
| 5 | SCL | I²C clock input - controls data timing; must be pulled high; supports fast (400kHz) and high-speed (1.7MHz) modes. |
| 6 | SDA | I²C bidirectional data line - transmits conversion results and receives configuration bytes; open-drain, pullup required. |
| 7 | GND | Analog/digital ground reference - must be connected to system ground plane with low-impedance path. |
| 8 | VDD | Positive supply input - operates from 2.7V to 3.6V; requires 0.1µF ceramic bypass capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ power management | Reduces supply current to <1µA between conversions - extends battery life in intermittent-sampling applications. |
| Integrated 2.048V reference | Eliminates need for external precision reference - saves board area and reduces BOM count and calibration complexity. |
| Pseudo-differential input mode | Rejects common-mode noise up to 75dB - improves measurement integrity in noisy industrial or medical environments. |
| Software-configurable input range | Unipolar (0 to VREF) or bipolar (±VREF/2) operation selectable per conversion - enables flexible sensor signal conditioning. |
| Internal FIFO with channel-scan mode | Automatically sequences through selected inputs - simplifies firmware for multi-sensor polling without host intervention. |
Applications
| Handheld Medical Instrumentation | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Portable blood glucose meters and pulse oximeters requiring low-power, multi-sensor analog acquisition. IC Role / Device Role / Timing Role: Primary ADC digitizing analog outputs from electrochemical and photodiode sensors with precise timing control. Use Value: 350µA active current and AutoShutdown™ enable >100 hours of operation on coin-cell batteries. |
Use Scenario: Field-deployable multimeters and environmental data loggers needing reliable, low-drift voltage/current measurement. IC Role / Device Role / Timing Role: Signal-conditioning front-end converting sensor outputs into digital values for microcontroller processing. Use Value: ±2 LSB TUE and 120ppm/°C reference drift ensure stable accuracy across temperature without recalibration. |
| Solar-Powered Remote Monitoring | System Supervision in Embedded Controllers |
Use Scenario: Off-grid telemetry nodes measuring solar panel voltage, battery state, and ambient temperature. IC Role / Device Role / Timing Role: Multi-channel analog monitor interfacing with photovoltaic arrays and Li-ion battery packs via I²C. Use Value: 4-channel capability and internal FIFO reduce MCU polling overhead and extend sleep intervals between wake-ups. |
Use Scenario: Real-time voltage, temperature, and fan tachometer monitoring inside industrial PLCs and network switches. IC Role / Device Role / Timing Role: Dedicated supervision ADC providing independent health metrics to system controller. Use Value: 2.048V reference aligns with common 3.3V logic domains and eliminates level-shifting components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, low-power, I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 200ksps, SPI interface, 2.7V–5.25V supply, no internal reference - requires external 2.048V reference and separate clock source. | Requires additional reference IC and PCB routing for SPI lines; less suitable for I²C-only systems. | Select when SPI interface is preferred and board space allows external reference integration. |
| MCP3021A0T-E/OT | 10-bit, 188ksps, I²C interface, 2.7V–5.5V supply, internal 2.048V reference, but only 1 input channel - lacks multi-channel MUX and channel-scan FIFO. | Not suitable for multi-sensor applications requiring automatic sequencing; limited to single-point measurements. | Choose for higher resolution where single-input simplicity outweighs channel count requirements. |
Compared with MAX1037LEKA+T, ADS7822U demands more external components and interface redesign, while MCP3021A0T-E/OT trades channel count and scan automation for increased resolution - making MAX1037LEKA+T optimal for compact, multi-sensor, I²C-based monitoring.
Availability
MAX1037LEKA+T is available at Aetrix Electronics and suitable for handheld medical instrumentation, battery-powered test equipment, and solar-powered remote monitoring requiring stable component supply and long-term production continuity.
Supply support for MAX1037LEKA+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 industrial, medical, and communications applications.
The MAX1036–MAX1039 family was designed specifically for ultra-low-power, multi-channel data acquisition in portable and energy-harvested systems - emphasizing integration, small footprint, and intelligent power management.
FAQ
What is the maximum sampling rate supported by the MAX1037LEKA+T?
The MAX1037LEKA+T supports a maximum sampling rate of 188 ksps when operating in I²C high-speed mode with external clocking. This rate is achievable only after the master issues the HS-mode master code (00001XXX) and initiates communication with a repeated START condition. At lower throughput rates, AutoShutdown™ reduces current consumption to under 1µA.
Does the MAX1037LEKA+T require an external reference voltage?
No, the MAX1037LEKA+T includes a factory-trimmed 2.048V internal reference with 120ppm/°C temperature coefficient, eliminating the need for external reference components in most applications. However, it also supports external references from 1V to VDD, allowing users to optimize full-scale range or improve accuracy using a higher-precision external source.
How many analog input channels does the MAX1037LEKA+T support?
The MAX1037LEKA+T supports four analog input channels (AIN0–AIN3/REF), configurable as single-ended inputs or two pseudo-differential pairs. Channel selection is performed via software-controlled configuration registers, and the internal FIFO supports automatic channel-scan mode for sequential conversions without host intervention.
What package type is used for the MAX1037LEKA+T?
The MAX1037LEKA+T is packaged in an 8-pin SOT23 (3.0mm × 1.7mm × 1.3mm) surface-mount package with RoHS-compliant, lead(Pb)-free finish. This compact, thermally efficient package is compatible with standard reflow soldering profiles and supports high-density PCB layouts typical in portable electronics.
Can the MAX1037LEKA+T operate in bipolar input mode?
Yes, the MAX1037LEKA+T supports bipolar operation in pseudo-differential input mode when the BIP/UNI bit in the setup byte is set to '1'. In this mode, the differential input range becomes ±VREF/2 (±1.024V with internal reference), and output codes are delivered in two's complement format. Single-ended mode always defaults to unipolar operation regardless of BIP/UNI setting.
MAX1037LEKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 188k
- Number of Inputs:
- 2, 4
- 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:
- SOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1037LEKA+T FAQ
1.How can I place an order for MAX1037LEKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1037LEKA+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 MAX1037LEKA+T reliable?
The price and inventory of MAX1037LEKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1037LEKA+T is usually 5 days.
3.What payment methods are accepted for MAX1037LEKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1037LEKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1037LEKA+T?
MAX1037LEKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1037LEKA+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 MAX1037LEKA+T?
For technical support, including MAX1037LEKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1037LEKA+T requirements.
6.How does Aetrix verify that MAX1037LEKA+T is sourced from the original manufacturer or authorized distributors?
All MAX1037LEKA+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 MAX1037LEKA+T meets industry standards.
7.What is the process for return or replacement of MAX1037LEKA+T?
All MAX1037LEKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1037LEKA+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 MAX1037LEKA+T part is unused and in its original packaging.
Return procedure for MAX1037LEKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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