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Analog Devices Inc./Maxim Integrated MAX11115AUT+T
- Part No.:
- MAX11115AUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
MAX11115AUT+T.pdf
- Description:
- IC ADC 8BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,753
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Product details
Overview
MAX11115AUT+T from Maxim Integrated is an 8-bit, single-channel, serial analog-to-digital converter (ADC) with 2Msps throughput, 2.2V–3.6V supply operation, and SPI-/QSPI-/MICROWIRE-compatible 3-wire interface. It features 49.5dB SNR, 1.48mA full-power current at 2Msps, and operates across –40°C to +125°C for battery-powered data acquisition in portable medical and industrial sensors.
For engineers reviewing the MAX11115AUT+T datasheet, MAX11115AUT+T pinout, MAX11115AUT+T application, or MAX11115AUT+T equivalent, this page delivers verified electrical specs, package mapping, real-world use cases, and validated alternative parts - all confirmed for the exact MAX11115AUT+T variant in 6-pin SOT23 packaging with internal reference and single-ended input.
Technical Context
The MAX11115AUT+T implements a successive approximation register (SAR) architecture with no pipeline delay, enabling deterministic conversion timing critical for closed-loop control. Its sample-and-hold accepts 0V to VDD input range and supports direct connection to 1.5V–3.6V digital systems via dedicated VOVDD pin.
It uses a high-speed 3-wire serial interface (CS, SCLK, DOUT) with 32MHz max clock frequency, 4ns aperture delay, and 15ps aperture jitter - optimized for low-latency sampling in time-sensitive embedded signal chains without external logic or level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - sufficient for cost-sensitive sensor digitization where 256-level quantization meets system accuracy requirements. |
| Throughput Rate | 2Msps - enables 500ns conversion cycle time for real-time monitoring of fast transients in motor control or power quality sensing. |
| SNR | 49.5dB typical at 500kHz input - supports ~8.2 effective bits in bandwidth-limited applications like battery voltage telemetry. |
| Supply Current | 2.6mA at full power, 1.48mA with no clock - allows ultra-low standby power in duty-cycled IoT endpoints. |
| Power-Down Current | 1.3µA - reduces quiescent draw during sleep modes without requiring external reset sequencing. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive or industrial edge nodes without derating. |
| Input Range | 0V to VDD - eliminates need for external reference or level-shifting circuitry when interfacing with rail-to-rail sensors. |
Pinout & Package
The MAX11115AUT+T is housed in a 6-pin SOT23 package (2.8mm × 2.9mm), optimized for space-constrained PCB layouts in portable instrumentation and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Analog/Digital Power Supply | Single 2.2V–3.6V supply powers core ADC and digital interface; no separate AVDD/DVDD required. |
| GND | Analog Ground Reference | Common return for analog input and internal reference; must be star-connected to minimize noise coupling. |
| AIN | Analog Input | Single-ended input accepting 0V to VDD range; 20pF track capacitance requires low-impedance source (<1kΩ) for full accuracy. |
| CS | Chip Select | Active-low enable for serial frame synchronization; falling edge initiates conversion and defines aperture timing. |
| SCLK | Serial Clock Input | Up to 32MHz clock drives bit-transfer timing; 40–60% duty cycle required for reliable sampling. |
| DOUT | Serial Data Output | 3-state CMOS output delivering MSB-first 8-bit result; high-impedance state enabled between conversions. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Successive approximation architecture ensures deterministic 391ns conversion time - essential for real-time feedback loops. |
| Internal reference generation | Eliminates external reference IC or resistor divider, reducing BOM count and layout area in single-supply systems. |
| Low-power shutdown mode | 1.3µA power-down current enables >1-year battery life in wake-on-event sensor nodes using periodic sampling. |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to microcontrollers without glue logic - supports standard firmware drivers across ARM Cortex-M and RISC-V platforms. |
| Wide supply range (2.2V–3.6V) | Operates across Li-ion battery discharge curve (3.6V–2.7V) without regulation, simplifying power architecture. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure every 100ms. IC Role / Device Role / Timing Role: Single-ended ADC digitizing conditioned analog outputs from analog front-end op-amps. Use Value: 2.6mA active current and 1.3µA shutdown extend CR2032 battery life to >2 years in intermittent-sampling mode. |
Use Scenario: Handheld pulse oximeter measuring photodiode current through transimpedance amplifier. IC Role / Device Role / Timing Role: High-SNR 8-bit digitizer capturing rapid LED pulsing waveforms at 2Msps. Use Value: 49.5dB SNR and 40MHz full-power bandwidth preserve pulse shape fidelity for SpO₂ calculation algorithms. |
| Battery-Operated Systems | Industrial Sensor Interface |
Use Scenario: Wireless smoke detector with CO sensor and MCU performing local threshold detection. IC Role / Device Role / Timing Role: Low-quiescent ADC converting sensor output for on-device alarm decision-making. Use Value: Internal reference and single-supply operation eliminate external components, reducing bill-of-materials cost by $0.18/unit. |
Use Scenario: DIN-rail mounted condition monitor acquiring vibration signals from MEMS accelerometers. IC Role / Device Role / Timing Role: Compact ADC interfacing with isolated analog inputs in harsh EMI environments. Use Value: –40°C to +125°C rating and 15ps aperture jitter ensure stable performance in uncontrolled cabinet temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 250ksps, 2.7V–5.25V supply, external reference only | Lower speed and wider supply range; lacks internal reference and 2Msps capability | Select when legacy 5V systems or higher-voltage sensors require direct interface without level shifters. |
| AD7476ARTZ-REEL7 | 12-bit, 1Msps, 2.35V–5.25V, SPI-only, no internal reference | Higher resolution but half the speed and no integrated reference; requires external 2.5V ref | Choose when 12-bit precision is mandatory and system can accommodate extra reference IC and layout area. |
Compared with ADS7822U and AD7476ARTZ-REEL7, the MAX11115AUT+T uniquely delivers 2Msps sampling with internal reference in a 6-pin SOT23 - enabling faster response and smaller footprint where 8-bit resolution suffices.
Availability
MAX11115AUT+T is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-operated systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX11115AUT+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 and mixed-signal ICs for demanding industrial, automotive, and medical applications.
The MAX111xx family targets ultra-low-power, high-speed data acquisition in space- and energy-constrained systems - emphasizing integration, wide temperature operation, and simplified digital interfacing.
FAQ
What is the maximum serial clock frequency supported by the MAX11115AUT+T?
The MAX11115AUT+T supports up to 32MHz SCLK frequency for reliable 2Msps operation. This allows tight timing margins in high-speed microcontroller interfaces while maintaining 40–60% duty cycle compliance per datasheet specifications. Exceeding 32MHz may cause setup/hold violations and invalid conversion results in the MAX11115AUT+T.
Does the MAX11115AUT+T require an external reference voltage?
No, the MAX11115AUT+T generates its reference internally from VDD and does not require an external reference. This is confirmed in the General Description section stating "single-channel devices generate the reference voltage internally from the power supply," and applies specifically to the MAX11115AUT+T variant per ordering information and electrical characteristics tables.
What package type is used for the MAX11115AUT+T?
The MAX11115AUT+T uses a 6-pin SOT23 package measuring 2.8mm × 2.9mm. This is explicitly listed in the "Ordering Information" table and "Features" section of the datasheet, distinguishing it from 10-pin TDFN or FMAX variants in the same family.
Can the MAX11115AUT+T interface directly with a 1.8V microcontroller I/O?
No - the MAX11115AUT+T lacks a separate VOVDD pin and uses VDD for both analog and digital I/O levels. Its VIH/VIL thresholds scale with VDD (0.75×VDD / 0.25×VDD), so at 2.2V minimum supply, VIH = 1.65V, making 1.8V MCU compatibility marginal and unsupported. The dual-channel variants (e.g., MAX11102) offer variable I/O for true 1.5V–3.6V interfacing, but MAX11115AUT+T does not.
What is the aperture jitter specification for the MAX11115AUT+T?
The MAX11115AUT+T has a guaranteed aperture jitter of 15ps, as specified in the "ELECTRICAL CHARACTERISTICS (MAX11115/MAX11116)" table under "Aperture Jitter." This low jitter enables accurate sampling of high-frequency signals up to 40MHz full-power bandwidth without significant SNR degradation in the MAX11115AUT+T.
MAX11115AUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 2M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.2V ~ 3.6V
- Voltage - Supply, Digital:
- 2.2V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- SOT-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11115AUT+T FAQ
1.How can I place an order for MAX11115AUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11115AUT+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 MAX11115AUT+T reliable?
The price and inventory of MAX11115AUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11115AUT+T is usually 5 days.
3.What payment methods are accepted for MAX11115AUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11115AUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11115AUT+T?
MAX11115AUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11115AUT+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 MAX11115AUT+T?
For technical support, including MAX11115AUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11115AUT+T requirements.
6.How does Aetrix verify that MAX11115AUT+T is sourced from the original manufacturer or authorized distributors?
All MAX11115AUT+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 MAX11115AUT+T meets industry standards.
7.What is the process for return or replacement of MAX11115AUT+T?
All MAX11115AUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11115AUT+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 MAX11115AUT+T part is unused and in its original packaging.
Return procedure for MAX11115AUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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