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Analog Devices Inc./Maxim Integrated MAX1037MEKA
- Part No.:
- MAX1037MEKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8
- Datasheet:
-
MAX1037MEKA.pdf
- Description:
- 4-CHANNEL SERIAL 8-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:1,038
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Product details
Overview
MAX1037MEKA from Maxim Integrated is an 8-bit, 4-channel, low-power analog-to-digital converter 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 throughput with 350µA supply current and supports software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes for embedded sensor monitoring and battery-powered measurement systems.
For engineers reviewing the MAX1037MEKA datasheet, MAX1037MEKA pinout, MAX1037MEKA application, or MAX1037MEKA equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to the MAX1037MEKA-T SOT23-8 variant.
Technical Context
The MAX1037MEKA implements successive-approximation ADC architecture with on-chip track/hold capacitor (CT/H), switched-capacitor DAC, and comparator. Its analog input multiplexer routes up to four channels to CT/H, which samples referenced to GND in single-ended mode or to a stable "–" input in pseudo-differential mode.
It operates in two clock modes: internal 2.25MHz oscillator or external I²C clock up to 1.7MHz. Conversion requires eight clock cycles plus acquisition time (588ns typical), and AutoShutdown™ reduces quiescent current to <1µA between conversions without external control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes; sufficient for basic sensor digitization and system supervision where high dynamic range is not required. |
| Sampling Rate | 188ksps - supports real-time capture of signals up to ~200kHz full-linear bandwidth; enables undersampling of higher-frequency transients. |
| Supply Voltage | 2.7V to 3.6V - compatible with 3.3V logic domains and Li-ion/Li-Po battery systems without regulation overhead. |
| Internal Reference | 2.048V ±120ppm/°C - provides stable scaling for unipolar 0–2.048V or bipolar ±1.024V input ranges; eliminates need for external precision reference in cost-sensitive designs. |
| Total Unadjusted Error | ±2 LSB - guarantees monotonicity and ≤0.8% full-scale error across –40°C to +85°C; suitable for industrial-grade calibration-free applications. |
| I²C Interface Speed | Up to 1.7MHz (High-Speed Mode) - reduces conversion readout latency to <5µs per sample; avoids bottlenecks in microcontroller-based data loggers. |
| Power Consumption | 350µA at 188ksps, 1µA in AutoShutdown - extends battery life in portable medical instruments and remote solar-powered sensors beyond 1 year on coin cells. |
Pinout & Package
MAX1037MEKA is housed in an 8-pin SOT23 package (JEDEC MO-178AA), footprint-compatible with standard pick-and-place equipment and space-constrained PCB layouts. The package features gull-wing leads, 0.65mm pitch, and thermal pad omitted - thermal dissipation relies on copper pour under pins 7 (GND) and 8 (VDD).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN0 | Analog input channel 0 - accepts unipolar 0–VREF or bipolar ±VREF/2 signals; must be driven by source impedance ≤1.5kΩ for <1LSB error. |
| 2 | AIN1 | Analog input channel 1 - identical electrical behavior to AIN0; shares same internal T/H and reference path. |
| 3 | AIN2 | Analog input channel 2 - software-selectable via CS[3:0] bits; no hardware muxing - all channels routed through single T/H stage. |
| 4 | AIN3/REF | Configurable terminal - functions as analog input 3 *or* reference voltage output/input depending on SEL[2:1] bits; decoupling capacitor required when used as REF. |
| 5 | SCL | I²C clock input - accepts 400kHz (Fast Mode) or 1.7MHz (High-Speed Mode) clocks; rising edge triggers sampling timing in external-clock mode. |
| 6 | SDA | I²C bidirectional data line - open-drain output with 3mA sink capability; requires external pull-up (≥500Ω) to VDD for reliable bus communication. |
| 7 | GND | Analog and digital ground reference - must be connected to low-impedance system ground plane; separates noise-sensitive analog paths from digital switching currents. |
| 8 | VDD | Positive supply - powers internal reference, T/H, and digital core; bypassing with 0.1µF ceramic capacitor to GND is mandatory for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA automatically between conversions - eliminates need for firmware-controlled power gating in intermittent-sampling applications. |
| Software-Configurable Input Modes | Single-ended or pseudo-differential operation selected via SGL/DIF bit; unipolar/bipolar range set by BIP/UNI bit - enables one hardware design to serve multiple sensor topologies. |
| Integrated 2.048V Reference | 120ppm/°C tempco and 1.925V–2.171V tolerance over temperature - removes external reference IC, saves board area, and avoids reference-related drift in portable devices. |
| Internal FIFO with Channel-Scan Mode | 12-byte RAM buffer supports automatic round-robin scanning of all 4 channels - simplifies firmware by offloading sequencing and reducing I²C transaction overhead. |
| Low Source Impedance Tolerance | Accurate sampling with ≤1.5kΩ source impedance - allows direct connection to resistive sensors (e.g., thermistors, potentiometers) without buffer amplifiers. |
Applications
| Hand-Held Portable Applications | Medical Instruments |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring DC voltage, resistance, and temperature via thermistor. IC Role / Device Role / Timing Role: ADC digitizes analog front-end outputs; internal 2.048V reference ensures consistent scaling across battery discharge; I²C interface synchronizes reads with MCU sleep/wake cycles. Use Value: 350µA active current and <1µA shutdown current extend 200mAh coin-cell life to >2 years in standby-with-periodic-measurement mode. |
Use Scenario: Portable pulse oximeter acquiring photodiode signals from red/IR LEDs. IC Role / Device Role / Timing Role: Simultaneous sampling of dual-channel analog front-end; pseudo-differential mode rejects common-mode LED drive noise; 188ksps supports oversampling for SNR improvement. Use Value: ±2 LSB TUE and 75dB CMRR ensure SpO₂ calculation accuracy remains within clinical ±2% tolerance despite varying skin contact impedance. |
| Battery-Powered Test Equipment | System Supervision |
Use Scenario: Field-deployable environmental sensor node logging temperature, humidity, and battery voltage. IC Role / Device Role / Timing Role: Digitizes multiple sensor outputs using channel-scan mode; internal FIFO buffers readings during MCU deep-sleep; AutoShutdown minimizes idle power. Use Value: Single 3.3V supply and integrated reference eliminate separate LDO and reference ICs - reduces BOM count by 2 components and PCB area by 12mm². |
Use Scenario: Industrial PLC module monitoring rail voltages, fan tachometer, and temperature sensors. IC Role / Device Role / Timing Role: Provides fault-detection inputs for undervoltage/overvoltage thresholds; 4-channel capability consolidates supervision signals onto one ADC instead of discrete comparators. Use Value: 2.048V reference enables precise 1% threshold detection (e.g., 3.3V rail = 1.62×VREF); ±2 LSB TUE ensures trip points remain stable across –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, multichannel, I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-pin SOIC, 2.7V–5.25V supply, SPI interface only, no internal reference - requires external 2.048V ref and level-shifting for 3.3V systems. | Not drop-in: SPI vs. I²C, no AutoShutdown, higher 1.2mA active current - unsuitable for ultra-low-power or I²C-only host systems. | Select only if existing design uses SPI and external reference is already present; avoid for new battery-powered designs due to power and interface mismatch. |
| MCP3021A0T-E/OT | 6-pin SOT23, 10-bit resolution, 2.7V–5.5V, I²C-compatible, no internal reference - relies entirely on external VREF (1V–VDD), no AutoShutdown. | Lacks integrated reference and power management - increases external component count and firmware complexity for low-power duty cycling. | Consider only for applications requiring 10-bit resolution and where external reference stability is tightly controlled; MAX1037MEKA offers better integration and lower system-level power. |
Compared with ADS7822U and MCP3021A0T-E/OT, the MAX1037MEKA provides superior system-level integration via its internal 2.048V reference, AutoShutdown™, and true I²C High-Speed Mode - reducing component count, PCB area, and firmware overhead while delivering lower active and standby current in portable and industrial supervision roles.
Availability
MAX1037MEKA is available at Aetrix Electronics and suitable for hand-held portable applications, medical instruments, and battery-powered test equipment requiring stable component supply, guaranteed extended-temperature performance (–40°C to +85°C), and long-term production continuity.
Supply support for MAX1037MEKA 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, space-constrained systems needing multichannel analog sensing with minimal external components - targeting portable instrumentation, remote monitoring, and embedded supervision.
FAQ
What is the maximum sampling rate supported by the MAX1037MEKA?
The MAX1037MEKA achieves a maximum sampling rate of 188ksps when operating in I²C High-Speed Mode with an external 1.7MHz clock. This requires the master device to issue the HS-mode master code (00001XXX) first, followed by a repeated START condition. At this rate, the MAX1037MEKA consumes 350µA and maintains ±2 LSB total unadjusted error across the industrial temperature range.
Does the MAX1037MEKA require an external reference voltage?
No, the MAX1037MEKA does not require an external reference voltage - it integrates a factory-trimmed 2.048V internal reference with 120ppm/°C temperature coefficient. Pin 4 (AIN3/REF) can be configured as a reference output or input, but default operation uses the internal reference. An external reference (1V to VDD) is optional and only needed when custom full-scale ranges or improved stability are required.
How many analog input channels does the MAX1037MEKA support?
The MAX1037MEKA supports four analog input channels (AIN0–AIN3), configurable in single-ended or pseudo-differential mode via the SGL/DIF bit. In pseudo-differential mode, it provides two differential pairs (AIN0–AIN1 and AIN2–AIN3). All channels share the same internal track/hold circuit and reference path, enabling sequential sampling without hardware reconfiguration.
What package type is used for the MAX1037MEKA?
The MAX1037MEKA is packaged in an 8-pin SOT23 (Small Outline Transistor) case, compliant with JEDEC MO-178AA. It features gull-wing leads, 0.65mm pitch, and no thermal pad. The top mark "AEKP" identifies the MAX1037MEKA-T variant and confirms the 2.048V internal reference and 8-channel-capable pinout (though only four analog inputs are implemented in this variant).
Can the MAX1037MEKA operate from a 3.3V supply?
Yes, the MAX1037MEKA is fully specified to operate from 2.7V to 3.6V, making it ideal for direct connection to standard 3.3V logic supplies. At 3.3V, it delivers full performance: 188ksps sampling, ±2 LSB total unadjusted error, and 350µA supply current. The internal 2.048V reference remains stable across this range, and I²C interface levels (VIH = 0.7×VDD, VIL = 0.3×VDD) are compatible with 3.3V microcontrollers.
MAX1037MEKA 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- Internal Oscillator
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1037MEKA FAQ
1.How can I place an order for MAX1037MEKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1037MEKA 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 MAX1037MEKA reliable?
The price and inventory of MAX1037MEKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1037MEKA is usually 5 days.
3.What payment methods are accepted for MAX1037MEKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1037MEKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1037MEKA?
MAX1037MEKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1037MEKA 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 MAX1037MEKA?
For technical support, including MAX1037MEKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1037MEKA requirements.
6.How does Aetrix verify that MAX1037MEKA is sourced from the original manufacturer or authorized distributors?
All MAX1037MEKA 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 MAX1037MEKA meets industry standards.
7.What is the process for return or replacement of MAX1037MEKA?
All MAX1037MEKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1037MEKA, 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 MAX1037MEKA part is unused and in its original packaging.
Return procedure for MAX1037MEKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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