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Analog Devices Inc./Maxim Integrated MAX11126ATI+T
- Part No.:
- MAX11126ATI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11126ATI+T.pdf
- Description:
- IC ADC 8BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,537
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Product details
Overview
MAX11126ATI+T from Analog Devices is a 12-bit, 16-channel, 1Msps SAR ADC with external reference support, 1.5MHz full-linear bandwidth, and integrated SampleSet™ channel sequencing. It operates from 2.35V–3.6V supply, consumes 5.4mW at 1Msps, and features 3-wire SPI-compatible serial interface-designed for high-speed data acquisition in battery-powered instrumentation.
For engineers reviewing the MAX11126ATI+T datasheet, MAX11126ATI+T pinout, MAX11126ATI+T application, or MAX11126ATI+T equivalent, key selection criteria include guaranteed ±1 LSB INL/DNL over temperature, 70dB SINAD at 250kHz, flexible analog input configuration (single-ended/differential/pseudo-differential), and AEC-Q100-qualified variant availability for automotive-grade designs.
Technical Context
The MAX11126ATI+T implements a successive-approximation register (SAR) architecture with true differential track-and-hold, supporting both internal clock mode (with 16-entry FIFO and averaging) and external clock mode (with SampleSet™ programmable sequencer). Its analog multiplexer enables 16 single-ended, 8 fully differential, or 15 pseudo-differential inputs relative to a common input.
It features dual supply domains: VDD (2.35V–3.6V) for analog core and OVDD (1.5V–3.6V) for digital I/O, enabling direct interfacing with 1.8V/2.5V/3.3V controllers. Input ranges are software-selectable bipolar (±VREF+/2 or ±VREF+) or unipolar (0 to VREF+), with REF+ accepting 1V to VDD and REF− accepting −0.3V to +1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with no missing codes across −40°C to +125°C. |
| Sampling Rate | 1Msps - supports real-time capture of signals up to 500kHz Nyquist frequency without pipeline delay. |
| INL / DNL | ±1 LSB / ±1 LSB - ensures monotonicity and end-point linearity critical for closed-loop control accuracy. |
| SINAD | 70 dB at 250kHz - enables 11.3-bit effective resolution for medium-frequency sensor signal digitization. |
| Power Dissipation | 5.4 mW at 1Msps (3V) - enables >10-hour operation on a 100mAh Li-ion cell in continuous acquisition mode. |
| Full Shutdown Current | 2 µA - reduces system standby power to sub-microwatt levels during idle intervals. |
| Serial Interface | 16MHz 3-wire SPI/QSPI/MICROWIRE - eliminates level-shifter requirements when connecting to modern microcontrollers. |
Pinout & Package
MAX11126ATI+T is housed in a 28-pin, 5mm × 5mm TQFN-EP package with exposed pad (Package Code T2855+3, Outline 21-0140), optimized for thermal performance (θJA = 29°C/W) and PCB space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN13 | Analog Input Channels | 14 dedicated single-ended inputs; configurable as 8 fully differential pairs or 15 pseudo-differential channels relative to AIN15/REF−. |
| CNVST/AIN14 | Conversion Start / Analog Input 14 | Active-low hardware trigger for conversion initiation; doubles as 15th analog input when not used as CNVST. |
| REF−/AIN15 | Reference Negative / Analog Input 15 | Differential reference return node; also serves as 16th analog input in single-ended mode. |
| REF+ | Positive Reference Input | Accepts 1V to VDD; requires 0.47µF bypass capacitor to GND for stable reference coupling. |
| VDD, DGND, GND, EP | Analog & Digital Power/Ground | VDD powers analog core; DGND isolates digital I/O noise; EP must be soldered to solid GND plane for thermal and EMI integrity. |
| OVDD | Digital I/O Supply | Independent 1.5V–3.6V rail decouples logic interface from analog supply, enabling mixed-voltage system integration. |
| SCLK, DIN, DOUT, CS, EOC | 3-Wire Serial Interface | Standard SPI timing (16MHz max); EOC asserts low only in internal-clock mode to signal data readiness. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencing | User-programmable 256-step sequence reduces MCU polling overhead and enables deterministic multichannel sampling without firmware intervention. |
| 16-Entry FIFO Buffer | Allows burst sampling at 1Msps while permitting slower host readout-eliminates timing-critical interrupt servicing in resource-limited microcontrollers. |
| Internal Averaging Mode | Improves SNR by up to 3dB for noisy industrial sensor signals without external filtering or post-processing. |
| Flexible Input Configuration | Single-ended, fully differential, and pseudo-differential modes per channel simplify front-end design across diverse transducer types (RTDs, strain gauges, current shunts). |
| Bipolar Input Ranges | Software-selectable ±VREF+/2 or ±VREF+ supports AC-coupled sensors and bidirectional measurement without external level-shifting circuitry. |
Applications
| High-Speed Data Acquisition Systems | Industrial Control Systems |
|---|---|
Use Scenario: Simultaneous monitoring of 16 pressure, temperature, and flow sensors in a PLC rack with 1ms cycle time. IC Role / Device Role / Timing Role: Primary 12-bit digitizer handling all analog inputs via SampleSet™-driven round-robin sequencing; EOC synchronizes DMA transfers. Use Value: Eliminates need for multiple ADCs or external mux controllers-reduces BOM count and layout complexity while maintaining 1Msps aggregate throughput. | Use Scenario: Closed-loop motor current sensing and position feedback in servo drives operating at 20kHz PWM frequency. IC Role / Device Role / Timing Role: High-fidelity current/voltage sampling with <8ns aperture jitter and 1.5MHz linear bandwidth ensures accurate field-oriented control calculations. Use Value: Enables precise torque ripple suppression and dynamic response within ±0.1% current regulation tolerance across temperature. |
| Medical Instrumentation | Battery-Powered Instruments |
Use Scenario: Portable ECG monitor acquiring 12-lead biopotential signals with baseline drift correction and motion artifact rejection. IC Role / Device Role / Timing Role: Low-noise 12-bit ADC with internal averaging and differential input configuration rejects common-mode interference from 50/60Hz mains. Use Value: Achieves diagnostic-grade 70dB SINAD at 250Hz without external op-amp filtering-extends usable battery life by minimizing active component count. | Use Scenario: Handheld multimeter performing simultaneous voltage, current, and resistance measurements with auto-ranging. IC Role / Device Role / Timing Role: Single-chip solution providing 16-channel flexibility for internal calibration references, sensor biasing, and measurement inputs. Use Value: 2µA shutdown current and 5.4mW active power enable >500 hours of standby time on two AA cells-meeting IEC 61010 portability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 8-channel, 16-bit, 1Msps, integrated reference; no SampleSet™ or FIFO; SPI-only interface. | Lacks multichannel sequencing flexibility; better suited for precision single-sensor systems requiring higher resolution over speed. | Select when absolute accuracy >12-bit and integrated reference simplify design-trade channel count and sequencing capability for resolution. |
| AD7960BCPZ | 18-bit, 5Msps, 8-channel, external reference; LVDS interface; no internal FIFO or averaging. | Higher resolution and speed but demands complex digital interface and power delivery; unsuitable for low-power portable use. | Choose for high-end test equipment where 18-bit fidelity and 5Msps throughput justify added layout and FPGA resource cost. |
Compared with ADS8688IPWR and AD7960BCPZ, MAX11126ATI+T uniquely balances 16-channel count, SampleSet™ programmability, and sub-6mW power-making it optimal for embedded systems needing deterministic multichannel acquisition without FPGA-level complexity or premium resolution cost.
Availability
MAX11126ATI+T is available at Aetrix Electronics and suitable for high-speed data acquisition systems, industrial control systems, medical instrumentation, and battery-powered instruments requiring stable component supply and long-term production continuity.
Supply support for MAX11126ATI+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX11120–MAX11128 family was designed specifically for low-power, high-channel-count data acquisition in space- and energy-constrained environments-emphasizing integrated intelligence (SampleSet™, FIFO, averaging) over raw resolution.
FAQ
What is the maximum sample rate supported by the MAX11126ATI+T?
The MAX11126ATI+T supports a maximum conversion rate of 1Msps in both internal and external clock modes. At this rate, conversion time is 5.9µs (internal clock) or 1000ns (external clock with 16MHz SCLK), with acquisition time fixed at 156ns-enabling reliable sampling of signals up to 500kHz under Nyquist criteria.
Does the MAX11126ATI+T require an external reference voltage?
Yes, the MAX11126ATI+T requires an external reference. REF+ accepts 1V to VDD, and REF−/AIN15 accepts −0.3V to +1V. The device does not include an internal reference; using VDD as REF+ is permitted but limits full-scale range to the supply voltage, affecting SNR if VDD is noisy.
How many analog input channels does the MAX11126ATI+T support?
The MAX11126ATI+T supports 16 analog input channels: AIN0–AIN13 (14 pins), plus CNVST/AIN14 and REF−/AIN15, which double as AIN14 and AIN15 in single-ended mode-enabling full 16-channel operation without external multiplexing.
What package type is used for the MAX11126ATI+T?
The MAX11126ATI+T uses a 28-pin, 5mm × 5mm TQFN-EP package (Package Code T2855+3, Outline 21-0140) with exposed thermal pad. This package provides θJA = 29°C/W and requires soldering the EP directly to a solid GND plane for optimal thermal performance and EMI suppression.
Is the MAX11126ATI+T compatible with standard SPI interfaces?
Yes, the MAX11126ATI+T features a 3-wire SPI-compatible serial interface operating up to 16MHz. It connects directly to SPI, QSPI™, and MICROWIRE® controllers without external logic-supporting standard CPOL=0, CPHA=0 timing with CS, SCLK, DIN, and DOUT signals.
MAX11126ATI+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:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8, 15, 16
- 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:
- -
MAX11126ATI+T FAQ
1.How can I place an order for MAX11126ATI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11126ATI+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 MAX11126ATI+T reliable?
The price and inventory of MAX11126ATI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11126ATI+T is usually 5 days.
3.What payment methods are accepted for MAX11126ATI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11126ATI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11126ATI+T?
MAX11126ATI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11126ATI+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 MAX11126ATI+T?
For technical support, including MAX11126ATI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11126ATI+T requirements.
6.How does Aetrix verify that MAX11126ATI+T is sourced from the original manufacturer or authorized distributors?
All MAX11126ATI+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 MAX11126ATI+T meets industry standards.
7.What is the process for return or replacement of MAX11126ATI+T?
All MAX11126ATI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11126ATI+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 MAX11126ATI+T part is unused and in its original packaging.
Return procedure for MAX11126ATI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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