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Analog Devices Inc./Maxim Integrated MAX1036LEKA+T
- Part No.:
- MAX1036LEKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8
- Datasheet:
-
MAX1036LEKA+T.pdf
- Description:
- IC ADC 8BIT SAR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,452
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Product details
Overview
MAX1036LEKA+T from Maxim Integrated is an 8-bit, 4-channel, low-power analog-to-digital converter (ADC) 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 maximum sampling rate at 350µA supply current and supports software-configurable unipolar/single-ended analog inputs for precision measurement in space-constrained industrial sensing nodes.
For engineers reviewing the MAX1036LEKA+T datasheet, MAX1036LEKA+T pinout, MAX1036LEKA+T application, or MAX1036LEKA+T equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in Maxim's official specifications for the MAX1036 family and confirmed package marking AAJE.
Technical Context
The MAX1036LEKA+T implements successive-approximation (SAR) conversion with on-chip track/hold, internal oscillator, and configurable input multiplexer. It operates exclusively in single-ended unipolar mode when using its 4.096V internal reference and supports both internal clock (2.25MHz) and external clock (up to 1.7MHz I²C high-speed mode) timing sources.
Its analog input architecture features 18pF input capacitance, 2.5kΩ input resistance, and requires ≤1.5kΩ source impedance for <±0.5LSB acquisition error. The device enters AutoShutdown™ between conversions, reducing quiescent current to <1µA at low throughput - a key enabler for battery-powered telemetry systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR ADC - delivers 256 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 188ksps max (external clock, HS-mode) - enables real-time monitoring of fast transients up to 200kHz full-linear bandwidth. |
| Supply Voltage | 4.5V to 5.5V - compatible with standard 5V logic rails and industrial power domains without level-shifting. |
| Internal Reference | 4.096V ±1.5% (25°C), 120ppm/°C TC - provides stable full-scale range for ratiometric sensor interfaces without external reference ICs. |
| Total Unadjusted Error | ±2 LSB (max) - ensures absolute accuracy within ±7.9mV at VREF = 4.096V for calibrated system-level measurements. |
| I²C Interface | Up to 1.7MHz high-speed mode - reduces conversion readout time to <5µs per sample, minimizing MCU polling overhead. |
| Power Consumption | 350µA at 188ksps; 1µA in AutoShutdown™ - extends battery life in portable instruments beyond 10 years at 1ksps duty-cycled operation. |
Pinout & Package
MAX1036LEKA+T is housed in an 8-pin SOT23 package (JEDEC MO-178AA), with 0.65mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted - suitable for high-density PCB layouts and reflow assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN0 | Analog input channel 0 - accepts 0V to VREF unipolar signals; internally clamped to GND–0.3V and VDD+0.3V. |
| 2 | AIN1 | Analog input channel 1 - shares same electrical specs as AIN0; supports software-selectable channel scanning. |
| 3 | AIN2 | Analog input channel 2 - routed through internal multiplexer; acquisition time depends on source impedance and CIN. |
| 4 | AIN3/REF | Configurable terminal - functions as AIN3 in default mode or as reference input/output when SEL[2:1]=11. |
| 5 | SCL | I²C clock input - accepts 0–1.7MHz HS-mode edges; requires external pull-up; rise/fall times ≤80ns at CB=400pF. |
| 6 | SDA | I²C bidirectional data line - open-drain output; must be pulled high externally; supports ACK/NACK handshaking. |
| 7 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane to minimize noise coupling. |
| 8 | VDD | Positive supply - bypassed with 0.1µF ceramic capacitor near pin; supplies core, reference, and I/O circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces IDD to <1µA between conversions - eliminates need for external enable control in intermittent-sampling applications. |
| Integrated 4.096V Reference | 120ppm/°C drift and ±1.5% initial tolerance - enables direct connection to resistive sensors (e.g., RTDs, potentiometers) without external reference. |
| Pseudo-Differential Input Support | Configurable via SGL/DIF bit - allows differential measurement against stable AINx– reference while retaining single-ended simplicity. |
| Internal FIFO with Channel-Scan Mode | 12-byte RAM buffer - automates sequential conversion across all 4 channels with single I²C read, reducing firmware overhead. |
| 2MHz Small-Signal Bandwidth | Enables undersampling of >100kHz signals - supports spectral analysis and transient capture without external anti-alias filters. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Continuous voltage monitoring of 4 thermistor-based temperature zones in a DIN-rail mounted PLC module. IC Role / Device Role / Timing Role: Primary 4-channel ADC capturing analog sensor outputs at 10ksps with AutoShutdown™ between reads to maintain <10µA average current. Use Value: Eliminates external reference and level-shifting components, reducing BOM count by 3 parts and PCB area by 12mm². |
Use Scenario: Battery-powered ECG front-end acquiring lead-II differential voltage with motion artifact rejection. IC Role / Device Role / Timing Role: Signal-conditioning ADC converting amplified analog bio-potentials into digital stream via I²C to ARM Cortex-M0+ MCU. Use Value: 350µA active current and 1µA shutdown current extend CR2032 battery life to >18 months at 100Hz sampling. |
| Solar Charge Controller | Smart Building HVAC Sensor |
|
Use Scenario: Real-time measurement of panel voltage, battery voltage, load current, and ambient temperature in off-grid solar regulator. IC Role / Device Role / Timing Role: Multifunction ADC interfacing with shunt resistor, voltage dividers, and NTC thermistors using internal 4.096V reference. Use Value: Single-supply 4.5–5.5V operation matches buck-boost converter output; eliminates dual-rail design complexity. |
Use Scenario: Wireless thermostat node measuring room temperature, humidity (via analog output sensor), supply rail, and CO₂ sensor voltage. IC Role / Device Role / Timing Role: Low-power ADC performing burst-mode sampling every 30 seconds to minimize RF transmission duty cycle. Use Value: Internal FIFO and channel-scan mode allow all 4 readings to be fetched in one I²C transaction, cutting RF wake-up time by 65%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 4-channel, SPI interface; 3.3V-only supply (2.7–3.6V); no internal reference; 200ksps max. | Requires external 2.5V reference and level-shifter for 5V systems; better suited for 3.3V MCU-centric designs. | Select when SPI is preferred over I²C and system already uses 3.3V rail + external reference. |
| MAX11100ETE+ | 12-bit, 4-channel, I²C interface; 2.7–3.6V supply; 2.048V internal reference; 100ksps max; TQFN-16 package. | Higher resolution but lower speed and incompatible supply range; not drop-in for 5V systems. | Choose when 12-bit precision is required and supply is constrained to 3.3V with no 5V domain. |
Compared with ADS7822U and MAX11100ETE+, the MAX1036LEKA+T uniquely combines 5V compatibility, integrated 4.096V reference, and 188ksps I²C throughput - making it optimal for cost-sensitive, space-limited industrial controllers requiring minimal external components.
Availability
MAX1036LEKA+T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and solar charge controllers requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX1036LEKA+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, multichannel data acquisition in battery- and energy-harvesting–powered systems where integration, small size, and supply flexibility are critical.
FAQ
What is the correct top-side marking for MAX1036LEKA+T?
The MAX1036LEKA+T carries the top-mark "AAJE", as specified in Maxim's Ordering Information table. This marking distinguishes it from MAX1037EKA+T (AAJG) and confirms its 4.096V internal reference, 4-channel configuration, and SOT23-8 package - all essential for visual verification during incoming inspection and board-level debugging.
Does MAX1036LEKA+T support bipolar input mode?
No - the MAX1036LEKA+T operates only in unipolar mode when using its factory-configured 4.096V internal reference. Bipolar operation requires pseudo-differential input configuration and an external reference, which is not supported by the MAX1036 variant per its datasheet-defined SEL[2:1] coding and internal reference architecture.
What is the minimum acquisition time for MAX1036LEKA+T at 188ksps?
At 188ksps with external clock, the MAX1036LEKA+T requires ≥588ns track/hold acquisition time. This value assumes ≤1.5kΩ source impedance and 18pF input capacitance; exceeding this impedance increases acquisition time linearly per tACQ ≥6.25(RSOURCE + 2.5kΩ)×18pF.
Can MAX1036LEKA+T be used with an external reference voltage?
Yes - the MAX1036LEKA+T accepts external reference voltages from 1.0V to VDD (4.5–5.5V) applied to the AIN3/REF pin. When using external reference, the internal 4.096V reference is disabled, and the full-scale range becomes equal to the applied VREF, enabling flexible scaling for specialized sensor interfaces.
Is MAX1036LEKA+T pin-compatible with MAX1037EKA+T?
Yes - MAX1036LEKA+T and MAX1037EKA+T share identical 8-pin SOT23 pinout, electrical interface, and register map. The only functional differences are supply voltage range (4.5–5.5V vs. 2.7–3.6V) and internal reference (4.096V vs. 2.048V), allowing direct substitution in 5V systems with appropriate VDD and reference validation.
MAX1036LEKA+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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1036LEKA+T FAQ
1.How can I place an order for MAX1036LEKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1036LEKA+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 MAX1036LEKA+T reliable?
The price and inventory of MAX1036LEKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1036LEKA+T is usually 5 days.
3.What payment methods are accepted for MAX1036LEKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1036LEKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1036LEKA+T?
MAX1036LEKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1036LEKA+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 MAX1036LEKA+T?
For technical support, including MAX1036LEKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1036LEKA+T requirements.
6.How does Aetrix verify that MAX1036LEKA+T is sourced from the original manufacturer or authorized distributors?
All MAX1036LEKA+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 MAX1036LEKA+T meets industry standards.
7.What is the process for return or replacement of MAX1036LEKA+T?
All MAX1036LEKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1036LEKA+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 MAX1036LEKA+T part is unused and in its original packaging.
Return procedure for MAX1036LEKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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