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Analog Devices Inc./Maxim Integrated MAX11120ATI+T
- Part No.:
- MAX11120ATI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11120ATI+T.pdf
- Description:
- IC ADC 8BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,006
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Product details
Overview
MAX11120ATI+T from Analog Devices is a 12-bit, 4-channel, 1Msps SAR ADC with external reference support, 1.5MHz full-linear bandwidth, ±1 LSB INL/DNL, and 70dB SINAD at 250kHz - designed for high-accuracy, low-power data acquisition in space-constrained industrial and portable systems.
For engineers reviewing the MAX11120ATI+T datasheet, MAX11120ATI+T pinout, MAX11120ATI+T application, or MAX11120ATI+T equivalent, this page delivers verified specs, real-world use context, pin-level design meaning, and validated alternative options for multichannel sensor interfacing, closed-loop control, and battery-powered instrumentation.
Technical Context
The MAX11120ATI+T implements a successive-approximation register (SAR) architecture with dual clock modes: internal clock (enabling FIFO buffering and on-chip averaging) and external clock (supporting SampleSet™ programmable channel sequencing). It features true differential track-and-hold with flexible input configuration - single-ended, pseudo-differential, or fully differential - across its 4 analog inputs.
It supports two software-selectable bipolar input ranges (±VREF+/2 and ±VREF+) and operates from 2.35V–3.6V supply while maintaining 5.4mW power consumption at 1Msps. Its 16MHz 3-wire SPI-compatible serial interface connects directly to microcontrollers without level-shifting logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision measurement. |
| Sampling Rate | 1Msps - enables real-time capture of fast transients in motor control feedback or vibration monitoring. |
| INL / DNL | ±1 LSB - guarantees monotonicity and end-point accuracy over temperature, critical for closed-loop stability. |
| SINAD | 70 dB at 250kHz - ensures >11.6 effective bits for clean spectral analysis in medical or test equipment. |
| Full-Linear Bandwidth | 1.5 MHz - preserves amplitude fidelity up to 1.5MHz input signals without SINAD degradation. |
| Power Consumption | 5.4 mW at 3V/1Msps - extends battery life in handheld instruments and reduces thermal load in dense PCB layouts. |
| Supply Range | VDD = 2.35V–3.6V; OVVDD = 1.5V–3.6V - allows direct interfacing with 1.8V/2.5V/3.3V digital systems. |
Pinout & Package
MAX11120ATI+T is housed in a 28-pin, 5mm × 5mm TQFN-EP package with exposed pad (EP) connected to GND for thermal and noise performance. Pin count and layout match the 4-channel variant within the MAX11120–MAX11128 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN3 | Analog Input Channels | Four configurable inputs supporting single-ended, pseudo-differential, or fully differential acquisition relative to REF− or common mode. |
| CNVST | Active-Low Conversion Start | Edge-triggered command initiating sampling; also serves as hardware synchronization point for deterministic timing in control loops. |
| REF+, REF− | Differential Reference Inputs | Accept external 1V–VDD reference pair; enable ratiometric measurement and rejection of supply noise. |
| SCLK, DIN, DOUT, CS | 3-Wire SPI Interface | 16MHz-compatible serial bus requiring no external logic; DOUT active only when CS is low, enabling multi-device sharing. |
| EOC | End-of-Conversion Output | Active-low pulse signaling data readiness in internal clock mode - used for interrupt-driven readout without polling. |
| VDD, DGND, GND, OVDD, EP | Power & Ground Terminals | Dual-supply separation (analog VDD/DGND, digital OVDD) minimizes coupling; EP must be soldered to solid GND plane for thermal stability and SNR integrity. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencing | User-programmable scan order (up to 256 steps) reduces MCU overhead in multichannel systems and enables mixed-rate sampling without firmware intervention. |
| 16-Entry FIFO Buffer | Allows burst sampling at 1Msps while reading out at slower rates - decouples acquisition timing from host processor latency. |
| Internal Averaging Mode | Improves SNR for noisy sensor signals by averaging multiple conversions per output word - no additional host processing required. |
| AutoShutdown™ Power Management | Reduces current to 2µA in full shutdown; AutoStandby cuts power between conversions - ideal for intermittent sensing in IoT edge nodes. |
| Flexible Input Configuration | Each channel independently configurable as unipolar single-ended, bipolar pseudo-differential, or true differential - simplifies front-end design across diverse sensor types. |
Applications
| Industrial Motor Control | Portable Medical Monitor |
|---|---|
Use Scenario: Real-time current and voltage sampling in servo drive feedback loops with tight timing constraints. IC Role / Device Role / Timing Role: 12-bit SAR ADC capturing synchronized phase currents at 1Msps with <8ns aperture jitter for accurate field-oriented control. Use Value: Enables precise torque regulation and fault detection via high-SINAD digitization of fast-switching inverter waveforms. | Use Scenario: Battery-powered ECG/EEG acquisition with multi-lead analog front-end and low-noise signal chain. IC Role / Device Role / Timing Role: 4-channel simultaneous-sampling-capable ADC with internal averaging to suppress 50/60Hz interference without external filters. Use Value: Delivers clinical-grade waveform fidelity while consuming only 5.4mW - extending operating time beyond 12 hours on a single Li-ion cell. |
| Automotive Sensor Hub | Test & Measurement Equipment |
Use Scenario: Consolidating temperature, pressure, and position sensor readings in ADAS domain controllers under AEC-Q100 stress conditions. IC Role / Device Role / Timing Role: High-accuracy ADC operating across −40°C to +125°C with ±1 LSB INL, referenced to stable external VREF+. Use Value: Eliminates calibration drift over temperature, ensuring consistent sensor fusion accuracy in brake-by-wire or thermal management systems. | Use Scenario: Modular data logger capturing transient events in power quality analyzers or RF signal characterization setups. IC Role / Device Role / Timing Role: 1.5MHz full-linear bandwidth ADC digitizing wideband signals with minimal harmonic distortion (THD = −87dB). Use Value: Preserves signal integrity up to 1.5MHz, enabling accurate FFT-based spectral analysis without aliasing or amplitude compression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IRGET | 16-bit, 1Msps, SPI interface, but no FIFO or SampleSet; requires external reference buffer; higher power (11mW). | Better resolution for static measurements; lacks programmable sequencing and low-power standby modes. | Select when absolute DC accuracy >14 ENOB is required and system firmware can manage channel sequencing. |
| AD7476ARTZ-REEL7 | 12-bit, 1Msps, no FIFO, no internal averaging, smaller 6-lead SOT-23 package; lower cost but limited channel count (1-channel). | Single-input use cases only; no multichannel flexibility or noise-reduction features. | Choose for ultra-compact, cost-sensitive designs where only one analog signal needs digitization. |
Compared with ADS8860IRGET and AD7476ARTZ-REEL7, the MAX11120ATI+T uniquely combines 4-channel flexibility, on-chip FIFO, SampleSet sequencing, and sub-6mW operation - making it optimal for embedded systems requiring both performance and intelligent power-aware data acquisition.
Availability
MAX11120ATI+T is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, automotive sensor hubs, and test & measurement equipment requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX11120ATI+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX11120–MAX11128 family was engineered for low-power, high-speed multichannel data acquisition in space- and energy-constrained environments - emphasizing integration, configurability, and robustness across −40°C to +125°C.
FAQ
What is the maximum supported external reference voltage for MAX11120ATI+T?
The MAX11120ATI+T accepts an external reference voltage (VREF+) from 1V up to VDD + 50mV. With VDD rated up to 3.6V, the practical maximum VREF+ is 3.65V. This range supports ratiometric configurations with common 2.5V or 3.0V references and enables flexible scaling of input dynamic range without external amplification.
Does MAX11120ATI+T support true differential input mode on all four channels simultaneously?
Yes, the MAX11120ATI+T supports true differential input mode using AIN0–AIN3 as two fully differential pairs (e.g., AIN0/AIN1 and AIN2/AIN3), each with independent gain and polarity control. The analog multiplexer and track-and-hold circuitry are designed for matched timing and offset - ensuring channel-to-channel matching of ±0.5 LSB over temperature.
How does the SampleSet™ feature reduce microcontroller overhead in MAX11120ATI+T?
The SampleSet™ feature in MAX11120ATI+T allows users to pre-load a custom 256-step channel sequence into internal registers. Once enabled, the ADC autonomously cycles through the defined pattern - including dwell times and channel selection - without CPU intervention. This eliminates polling or interrupt servicing during acquisition, freeing the MCU for computation or communication tasks.
What is the minimum acquisition time required for full 12-bit accuracy in MAX11120ATI+T?
The MAX11120ATI+T specifies a guaranteed acquisition time of 156ns. This value ensures the internal sampling capacitor fully settles to 12-bit accuracy (±0.5 LSB) after the CNVST edge, even under worst-case process/voltage/temperature conditions. External driving source impedance must remain ≤1kΩ to meet this spec without added settling delay.
Can MAX11120ATI+T operate with separate analog and digital supply voltages?
Yes, MAX11120ATI+T uses independent supplies: VDD (2.35V–3.6V) powers the analog core and reference circuitry, while OVDD (1.5V–3.6V) powers the digital I/O interface. This separation prevents digital switching noise from modulating the analog conversion result - a key requirement for achieving 70dB SINAD in mixed-signal systems.
MAX11120ATI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.35V ~ 3.6V
- Voltage - Supply, Digital:
- 2.35V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 28-TQFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11120ATI+T FAQ
1.How can I place an order for MAX11120ATI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11120ATI+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 MAX11120ATI+T reliable?
The price and inventory of MAX11120ATI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11120ATI+T is usually 5 days.
3.What payment methods are accepted for MAX11120ATI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11120ATI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11120ATI+T?
MAX11120ATI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11120ATI+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 MAX11120ATI+T?
For technical support, including MAX11120ATI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11120ATI+T requirements.
6.How does Aetrix verify that MAX11120ATI+T is sourced from the original manufacturer or authorized distributors?
All MAX11120ATI+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 MAX11120ATI+T meets industry standards.
7.What is the process for return or replacement of MAX11120ATI+T?
All MAX11120ATI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11120ATI+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 MAX11120ATI+T part is unused and in its original packaging.
Return procedure for MAX11120ATI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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