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Analog Devices Inc./Maxim Integrated MAX11117AUT+T
- Part No.:
- MAX11117AUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
MAX11117AUT+T.pdf
- Description:
- IC ADC 10BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
MAX11117AUT+T from Maxim Integrated is a 10-bit, 3Msps successive approximation analog-to-digital converter (ADC) with dual single-ended analog inputs, 2.2V–3.6V supply operation, and SPI-/QSPI-/MICROWIRE-compatible 3-wire serial interface. It features 73dB SNR, 1.3µA power-down current, and operates across –40°C to +125°C - optimized for portable data logging and battery-powered medical instrumentation.
For engineers reviewing the MAX11117AUT+T datasheet, MAX11117AUT+T pinout, MAX11117AUT+T application, or MAX11117AUT+T equivalent, this device delivers high-speed, low-power conversion in a compact 10-pin TDFN package with external reference support, fast wake-up, and direct interfacing to 1.5V–3.6V digital systems without level-shifting logic.
Technical Context
The MAX11117AUT+T implements a SAR architecture with integrated sample-and-hold, supporting up to 3Msps throughput at 10-bit resolution. Its dual-channel MUX enables time-multiplexed sampling of two independent analog signals, while the dedicated REF input accepts an external voltage (1V to VDD + 0.05V) for precision scaling.
It uses a 3-wire serial interface (CS, SCLK, DOUT) with no pipeline delay, compatible with SPI/QSPI/MICROWIRE controllers. The device supports variable I/O voltage (1.5V–3.6V) on the OVDD pin, enabling direct connection to mixed-voltage digital subsystems without external translation circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - provides 1024 discrete output codes for medium-precision sensor digitization and control-loop feedback. |
| Conversion Rate | 3Msps - enables real-time acquisition of signals up to 1.5MHz Nyquist bandwidth (e.g., audio band, motor phase currents). |
| SNR | 73dB typical - ensures ≥9 effective bits (ENOB ≈ 9.2) at 500kHz input, critical for dynamic signal fidelity in medical front-ends. |
| Power Consumption | 5.2mW at 3Msps - translates to 1.73µW per sample, minimizing thermal load and extending battery life in portable systems. |
| Supply Voltage | 2.2V–3.6V - supports direct integration with Li-ion (3.0–3.6V) and coin-cell (2.2–3.0V) power rails without regulators. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive sensors, industrial PLC modules, and outdoor environmental monitors. |
| Reference Input | External REF pin (1V to VDD + 0.05V) - allows use of precision low-drift references (e.g., MAX6126) for <±0.5% total unadjusted error. |
Pinout & Package
MAX11117AUT+T is housed in a 10-pin, 3mm × 3mm TDFN-EP package with exposed pad for thermal dissipation. Pin functions are validated per Maxim's MAX11117 datasheet (Rev 8, July 2013).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1 / AIN2 | Analog input channels | Dual single-ended inputs multiplexed into SAR core; each accepts 0V to VREF range - supports differential-sensing via external resistor network. |
| REF | External reference voltage input | Accepts precision reference (1V–VDD+0.05V); enables ratiometric or absolute measurement modes - not present in single-channel variants. |
| VDD | Analog power supply | 2.2V–3.6V analog rail; powers internal sample-and-hold and ADC core - must be filtered with ≥1µF ceramic capacitor. |
| OVDD | Digital I/O supply | 1.5V–3.6V logic interface supply - decouples digital noise from analog section and sets VIH/VIL thresholds. |
| AGND / DGND | Analog and digital ground | Separate pins require star grounding at single point near exposed pad to minimize ground bounce and crosstalk. |
| CS | Chip select | Active-low frame sync; falling edge initiates conversion and defines timing window for SCLK/DOUT - supports daisy-chaining. |
| SCLK | Serial clock | Up to 48MHz clock; controls bit transfer timing - duty cycle 40–60% required for reliable sampling of DOUT. |
| DOUT | Serial data output | 3-wire mode only; outputs MSB-first 10-bit result after CS assertion - high-impedance when CS high or during power-down. |
| CHSEL | Channel select | Controls MUX to choose AIN1 or AIN2; logic high selects AIN2 - enables synchronized dual-channel sampling in external firmware. |
| EP | Exposed thermal pad | Internally connected to AGND; must be soldered to PCB thermal plane for junction temperature control below 150°C. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture delivers deterministic latency (260ns conversion + 4ns aperture delay), essential for closed-loop control timing predictability. |
| Variable I/O voltage (1.5V–3.6V) | OVDD pin allows direct interface to 1.8V FPGA I/O banks or 3.3V microcontroller SPI peripherals without level shifters - reduces BOM count. |
| Low-noise 73dB SNR | Optimized track/hold and layout-insensitive design achieves >9 ENOB at 500kHz - suitable for ECG front-ends and vibration monitoring. |
| 1.3µA power-down current | Enables ultra-low-quiescent operation between samples; ideal for duty-cycled sensor nodes where average current must stay <10µA. |
| External reference input | REF pin supports precision references (e.g., MAX6126AASA+) for <±0.1% gain drift over temperature - critical for calibrated measurement systems. |
| –40°C to +125°C operation | Qualified across full automotive and industrial temperature range; parametric specs guaranteed - eliminates derating calculations for harsh environments. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure every 100ms. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing thermistor and capacitive humidity sensor outputs with synchronized sampling. Use Value: 3Msps rate enables oversampling for noise reduction; 5.2mW power enables >1-year operation on 2000mAh Li-ion cell. |
Use Scenario: Portable ECG monitor acquiring lead-I and lead-II signals for arrhythmia detection. IC Role / Device Role / Timing Role: Precision 10-bit digitizer capturing biopotential waveforms with external 2.5V reference for stable baseline. Use Value: 73dB SNR preserves QRS complex morphology; 1.3µA power-down extends runtime during sleep mode between heartbeats. |
| Battery-Operated Systems | Automotive Systems |
|
Use Scenario: Wireless smart thermostat using thermistor and CO₂ sensor with BLE transmission every 5 seconds. IC Role / Device Role / Timing Role: Low-power ADC converting analog sensor outputs before MCU-triggered BLE burst transmission. Use Value: 2.2V minimum supply allows operation down to 2.4V battery voltage; variable OVDD simplifies interface to 1.8V BLE SoC. |
Use Scenario: Engine control unit monitoring throttle position and intake air temperature in under-hood location. IC Role / Device Role / Timing Role: High-temperature-stable ADC digitizing potentiometer and NTC outputs for closed-loop fuel injection. Use Value: Guaranteed –40°C to +125°C operation eliminates need for local cooling; external REF enables calibration traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11110AUT+T | Same 10-bit, 2Msps speed; lower power (3.7mW); no external REF pin - internal reference only. | Best for cost-sensitive, single-reference designs where 2Msps suffices and external reference isn't required. | Select MAX11110AUT+T when system-level accuracy is dominated by sensor tolerance, not reference stability. |
| ADS7953IRHBT | Texas Instruments 12-bit, 1MSPS SAR ADC; 16-channel MUX; SPI interface; 2.7–5.25V supply. | Higher resolution and channel count, but slower and higher power (12mW); requires external reference for full accuracy. | Choose ADS7953IRHBT for multi-sensor industrial I/O modules needing >10-bit resolution and channel flexibility. |
Compared with MAX11117AUT+T, MAX11110AUT+T trades speed and external reference capability for lower power and cost, while ADS7953IRHBT offers higher resolution and channel density at the expense of throughput and quiescent current - making MAX11117AUT+T optimal for 3Msps dual-channel, low-power, reference-flexible designs.
Availability
MAX11117AUT+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 assurance, and RoHS-compliant packaging.
Supply support for MAX11117AUT+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 - emphasizing low power, small size, and high reliability.
The MAX111xx family targets high-speed, low-power data acquisition in space-constrained, battery-sensitive systems - delivering SAR performance with minimal external components and robust temperature operation.
FAQ
What is the maximum serial clock frequency supported by MAX11117AUT+T?
The MAX11117AUT+T supports up to 48MHz SCLK in 3Msps mode, with 40–60% duty cycle required. At this rate, it completes a 10-bit conversion in 260ns, including acquisition and conversion time. This timing is validated across –40°C to +125°C and ensures reliable DOUT sampling when t4 ≤ 15ns (VOVDD ≥ 2.2V). Exceeding 48MHz may cause setup/hold violations.
Does MAX11117AUT+T require an external reference voltage?
Yes, MAX11117AUT+T requires an external reference voltage applied to the REF pin, which sets the full-scale input range (0V to VREF). Unlike single-channel variants (e.g., MAX11115), the MAX11117AUT+T lacks internal reference generation - enabling precision applications using low-drift references like the MAX6126AASA+.
Can MAX11117AUT+T interface directly with a 1.8V microcontroller SPI port?
Yes, MAX11117AUT+T can interface directly with a 1.8V microcontroller SPI port by connecting OVDD to 1.8V. Its digital inputs accept VIH = 0.75 × OVDD (≥1.35V) and VIL = 0.25 × OVDD (≤0.45V), and DOUT drives VOH ≥ 1.53V and VOL ≤ 0.27V - fully compliant with 1.8V logic thresholds without level shifters.
What is the power-down current of MAX11117AUT+T, and how is it activated?
The MAX11117AUT+T draws 1.3µA typical in power-down mode, activated by holding CS high for >100ns after the last SCLK edge. During power-down, the internal reference buffer and sample-and-hold are disabled, and DOUT enters high-impedance state. Wake-up time is one conversion cycle (≤260ns), enabling rapid resumption of sampling.
How does the CHSEL pin function in MAX11117AUT+T?
The CHSEL pin selects between AIN1 (CHSEL = low) and AIN2 (CHSEL = high) for conversion. It operates synchronously with CS: the selected channel is sampled on the CS falling edge. This allows firmware-controlled dual-channel acquisition without reconfiguring the MUX mid-sequence - critical for phase-aligned measurements in motor control or sensor fusion.
MAX11117AUT+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:
- 10
- Sampling Rate (Per Second):
- 3M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- 3-Wire Serial, Microwire, QSPI, 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:
- -
MAX11117AUT+T FAQ
1.How can I place an order for MAX11117AUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11117AUT+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 MAX11117AUT+T reliable?
The price and inventory of MAX11117AUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11117AUT+T is usually 5 days.
3.What payment methods are accepted for MAX11117AUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11117AUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11117AUT+T?
MAX11117AUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11117AUT+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 MAX11117AUT+T?
For technical support, including MAX11117AUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11117AUT+T requirements.
6.How does Aetrix verify that MAX11117AUT+T is sourced from the original manufacturer or authorized distributors?
All MAX11117AUT+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 MAX11117AUT+T meets industry standards.
7.What is the process for return or replacement of MAX11117AUT+T?
All MAX11117AUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11117AUT+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 MAX11117AUT+T part is unused and in its original packaging.
Return procedure for MAX11117AUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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