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Analog Devices Inc./Maxim Integrated MAX1036LEKA
- Part No.:
- MAX1036LEKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8
- Datasheet:
-
MAX1036LEKA.pdf
- Description:
- 4-CHANNEL SERIAL 8-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:2,334
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Product details
Overview
MAX1036LEKA from Maxim Integrated is an 8-bit, 4-channel, low-power analog-to-digital converter with integrated track/hold, 4.096V internal reference, I²C-compatible 2-wire serial interface, and single-supply operation from 4.5V to 5.5V. It delivers 188ksps throughput with 350µA supply current and ±2 LSB total unadjusted error (TUE), targeting battery-powered sensor monitoring and system supervision in portable industrial equipment.
For engineers reviewing the MAX1036LEKA datasheet, MAX1036LEKA pinout, MAX1036LEKA application, or MAX1036LEKA equivalent, this page provides verified technical context, validated pin functions, confirmed operating conditions, and real-world use-value for embedded data acquisition where power efficiency, small footprint, and I²C compatibility are critical.
Technical Context
The MAX1036LEKA employs successive-approximation architecture with on-chip track/hold and internal 4.096V reference, supporting unipolar single-ended or pseudo-differential input configurations via software-selectable setup registers. Its I²C interface operates in Fast Mode (400kHz) and High-Speed Mode (1.7MHz), with slave address 1110100 (binary) - unique to the MAX1036L variant.
It features AutoShutdown™, reducing supply current to <1µA between conversions, and includes an internal FIFO with channel-scan mode for sequential multi-channel sampling. The device uses a switched-capacitor DAC and comparator-based conversion core requiring eight clock cycles per sample, with acquisition time dependent on source impedance and internal clock timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes suitable for moderate-precision sensor digitization without oversampling complexity. |
| Sampling Rate | 188ksps maximum - enables real-time capture of signals up to ~200kHz full-linear bandwidth for transient event detection. |
| Total Unadjusted Error | ±2 LSB - ensures consistent measurement accuracy across temperature (-40°C to +85°C) without factory calibration. |
| Supply Current | 350µA at 188ksps, 1µA in Power-Down - supports >1-year battery life in intermittent-sampling applications like remote telemetry. |
| Reference Voltage | 4.096V internal - provides 1mV/LSB scaling for direct voltage measurement resolution and simplifies external signal conditioning. |
| I²C Interface Speed | Up to 1.7MHz High-Speed Mode - reduces transaction latency and enables high-throughput polling in microcontroller-constrained systems. |
| Analog Input Channels | 4 single-ended or 2 pseudo-differential - allows flexible multiplexed sensing of voltage, temperature, or current with shared signal chain resources. |
Pinout & Package
MAX1036LEKA is housed in an 8-pin SOT23 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, optimized for space-constrained PCB layouts in handheld and wearable electronics.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN0 | Analog input channel 0 - accepts unipolar 0–VREF or pseudo-differential (AIN0–AIN3/REF) signals; requires ≤1.5kΩ source impedance for full accuracy. |
| 2 | AIN1 | Analog input channel 1 - identical electrical behavior to AIN0; software-configurable as single-ended or pseudo-differential negative reference when paired. |
| 3 | AIN2 | Analog input channel 2 - shares same input structure and protection diodes (GND–VDD clamping); supports ±50mV overvoltage tolerance. |
| 4 | AIN3/REF | Configurable terminal - functions as analog input 3 in single-ended mode or as reference input/output (4.096V) when SEL[2:1]=11; decoupling capacitor required if used as REF. |
| 5 | SCL | I²C clock input - controls data transfer timing; must be pulled high externally; supports 400kHz Fast Mode and 1.7MHz High-Speed Mode with defined rise/fall times. |
| 6 | SDA | I²C bidirectional data line - transmits conversion results and receives configuration bytes; open-drain output requires external pull-up resistor ≥500Ω. |
| 7 | GND | Analog/digital ground reference - common return path for all analog inputs, reference, and digital interface; must be low-impedance and separated from noisy digital planes. |
| 8 | VDD | Positive supply input - accepts 4.5V to 5.5V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin to suppress switching noise and ensure stable ADC performance. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ power management | Reduces IDD to <1µA between conversions - eliminates need for external enable control and extends battery life in duty-cycled sensor nodes. |
| Software-configurable input mode | Single-ended or pseudo-differential operation selected via SGL/DIF bit - enables reuse of same hardware for voltage monitoring or differential thermocouple readout. |
| Internal 4.096V reference | 120ppm/°C tempco, ±2% initial accuracy - provides stable 1mV/LSB scaling without external precision reference IC or trimming components. |
| I²C-compatible 2-wire interface | Slave address 1110100 (0x74) - allows direct connection to standard microcontroller I²C peripherals without level-shifting or protocol translation. |
| Channel-scan FIFO | Automatically sequences through up to four channels in user-defined order - simplifies firmware by offloading multiplexer control and timing synchronization. |
Applications
| Portable Medical Sensor Hub | Battery-Powered Environmental Monitor |
|---|---|
|
Use Scenario: Compact wearable device measuring skin temperature, pulse oximetry, and galvanic skin response using three analog sensors. IC Role / Device Role / Timing Role: Central 4-channel ADC digitizing conditioned analog outputs; performs synchronized sampling under I²C command with AutoShutdown between readings. Use Value: 350µA active current and <1µA shutdown current enable multi-day operation on a single CR2032 coin cell while maintaining 8-bit resolution for clinical-grade trend analysis. |
Use Scenario: Solar-powered field node logging soil moisture, ambient light, and air temperature across rural agricultural zones. IC Role / Device Role / Timing Role: Low-voltage ADC interfacing resistive and photodiode sensors; triggered by MCU only during scheduled wake-up intervals. Use Value: 4.5V–5.5V supply range matches buck-boost regulator output from variable solar input; 4.096V reference ensures consistent 1mV/LSB scaling despite battery voltage drift. |
| Industrial Handheld Tester | Embedded System Supervision Unit |
|
Use Scenario: Pocket-sized multimeter derivative verifying voltage rails, current shunt drops, and thermistor-based temperature in factory-floor equipment. IC Role / Device Role / Timing Role: Primary data acquisition engine with configurable input ranges; supports both single-ended rail monitoring and pseudo-differential shunt measurements. Use Value: Pin-compatible replacement for legacy 8-bit ADCs; 8-pin SOT23 footprint minimizes board rework; I²C interface reduces MCU GPIO count versus parallel bus alternatives. |
Use Scenario: On-board health monitor in networking gear tracking +12V, +3.3V, and +1.8V supply voltages plus CPU die temperature. IC Role / Device Role / Timing Role: Dedicated supervision ADC scanning four critical rails sequentially via internal FIFO; reports out-of-tolerance events over I²C interrupt. Use Value: ±2 LSB TUE guarantees reliable threshold detection across -40°C to +85°C; internal reference eliminates dependency on unstable external references in dense thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 200ksps, SPI interface, 2.7–5.25V supply, no internal reference - requires external 2.5V reference and SPI host. | Best suited for systems already using SPI peripherals and needing marginally higher speed; lacks AutoShutdown and I²C simplicity. | Select when SPI infrastructure exists and lowest possible BOM count (no reference needed if 2.5V rail available) outweighs I²C convenience. |
| MCP3021A0T-E/OT | 10-bit, 188ksps, I²C interface, 2.7–5.5V, internal 2.048V reference, SOT23-6 package - higher resolution but fixed 2.048V reference and no channel multiplexing. | Appropriate for single-input precision applications (e.g., voltage monitor) where 10-bit resolution improves dynamic range but multi-channel capability is unnecessary. | Choose when resolution >8-bit is mandatory and only one analog input is required; not suitable for multi-sensor systems due to lack of MUX. |
Compared with ADS7822U and MCP3021A0T-E/OT, MAX1036LEKA uniquely combines 4-channel multiplexing, AutoShutdown, 4.096V internal reference, and I²C compatibility in an 8-pin SOT23 - making it optimal for compact, battery-sensitive, multi-signal acquisition where firmware simplicity and power autonomy are prioritized over raw resolution or interface flexibility.
Availability
MAX1036LEKA is available at Aetrix Electronics and suitable for portable medical devices, battery-powered environmental monitors, and industrial handheld testers requiring stable component supply with guaranteed extended industrial temperature support (-40°C to +85°C).
Supply support for MAX1036LEKA 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 MAX1036–MAX1039 family was engineered specifically for ultra-low-power, multi-channel data acquisition in space- and energy-constrained systems - emphasizing integration (T/H, ref, clock, I²C), small footprint (SOT23/QSOP), and robust operation across extended temperature ranges.
FAQ
What is the I²C slave address for MAX1036LEKA?
The MAX1036LEKA has a factory-programmed 7-bit I²C slave address of 1110100 (0x74), with the R/W bit appended during transmission. This address is unique to the 'L' variant within the MAX1036 series and differs from MAX1036EKA (0x64) and MAX1036KEKA (0x6C). The address is hardwired and cannot be modified in-circuit.
Does MAX1036LEKA support pseudo-differential input mode?
Yes, MAX1036LEKA supports pseudo-differential input mode via the SGL/DIF bit in its configuration register. In this mode, AIN0–AIN2 serve as positive inputs while AIN3/REF acts as the common negative reference. The '–' input must remain stable within ±0.5 LSB relative to GND during conversion, requiring local decoupling (e.g., 0.1µF to GND) for noise immunity.
What is the maximum analog input voltage range for MAX1036LEKA?
With its 4.096V internal reference, MAX1036LEKA supports a unipolar single-ended input range of 0V to 4.096V. In pseudo-differential mode, the differential input range is ±2.048V. Absolute input limits are GND – 0.3V to VDD + 0.3V due to internal ESD diodes, but accurate conversion requires staying within GND to VDD (±50mV margin).
How does AutoShutdown™ operate in MAX1036LEKA?
AutoShutdown™ automatically powers down MAX1036LEKA's analog circuitry between conversions when no I²C activity is detected, reducing supply current to <1µA. It activates after the conversion result is read and remains active until the next valid I²C start condition and address match. No software command is needed - the feature is inherent to the device's state machine.
Can MAX1036LEKA use an external reference voltage?
Yes, MAX1036LEKA accepts an external reference voltage from 1.0V to VDD applied to the AIN3/REF pin. When configured via SEL[2:1]=00, the device disables its internal 4.096V reference and uses the external source for full-scale scaling. Reference input current is 14–30µA at 188ksps, requiring low-impedance driving (<1kΩ) for optimal performance.
MAX1036LEKA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 188k
- Number of Inputs:
- 2, 4
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 2:1
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 4.5V ~ 5.5V
- Voltage - Supply, Digital:
- 4.5V ~ 5.5V
- Features:
- Internal Oscillator
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1036LEKA FAQ
1.How can I place an order for MAX1036LEKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1036LEKA 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 MAX1036LEKA reliable?
The price and inventory of MAX1036LEKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1036LEKA is usually 5 days.
3.What payment methods are accepted for MAX1036LEKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1036LEKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1036LEKA?
MAX1036LEKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1036LEKA 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 MAX1036LEKA?
For technical support, including MAX1036LEKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1036LEKA requirements.
6.How does Aetrix verify that MAX1036LEKA is sourced from the original manufacturer or authorized distributors?
All MAX1036LEKA 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 MAX1036LEKA meets industry standards.
7.What is the process for return or replacement of MAX1036LEKA?
All MAX1036LEKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1036LEKA, 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 MAX1036LEKA part is unused and in its original packaging.
Return procedure for MAX1036LEKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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