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Analog Devices Inc./Maxim Integrated MAX11123ATI+T
- Part No.:
- MAX11123ATI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11123ATI+T.pdf
- Description:
- IC ADC 8BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,159
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Product details
Overview
MAX11123ATI+T from Analog Devices is a 12-bit, 8-channel, 1Msps SAR analog-to-digital converter 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 targets high-speed data acquisition in space-constrained industrial and portable instrumentation.
For engineers reviewing the MAX11123ATI+T datasheet, MAX11123ATI+T pinout, MAX11123ATI+T application, or MAX11123ATI+T equivalent, this page delivers verified specifications, real-world use cases, pin-level circuit roles, and validated alternative options for multichannel, low-power ADC selection.
Technical Context
The MAX11123ATI+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). Its analog front-end supports single-ended, pseudo-differential, and fully differential input configurations across all 8 channels.
It features a 16MHz 3-wire SPI-/QSPI-/MICROWIRE-compatible serial interface, 2.35V–3.6V analog supply (VDD), and separate 1.5V–3.6V digital I/O supply (OVDD), enabling direct interfacing with 1.8V/2.5V/3.3V controllers. The device guarantees ±1 LSB INL and ±1 LSB DNL over –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - Delivers 4096 discrete output codes for precision measurement of sensor or signal chain outputs. |
| Sampling Rate | 1Msps - Enables real-time capture of signals up to 500kHz (Nyquist-limited) in closed-loop control or vibration monitoring. |
| Full-Linear Bandwidth | 1.5MHz - Maintains ≥70dB SINAD across input frequencies up to 1.5MHz, critical for wideband sensor conditioning. |
| Power Consumption | 5.4mW at 1Msps (3V) - Supports battery-powered operation for >100 hours in portable instruments with 100mAh cells. |
| Analog Input Channels | 8-channel - Configurable as single-ended, pseudo-differential, or fully differential pairs, reducing external multiplexer needs. |
| Reference Support | External differential (REF+/REF−) - Allows precise ratiometric or isolated reference sourcing, improving system accuracy vs. internal references. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive, motor drive feedback, and industrial PLC environments. |
Pinout & Package
MAX11123ATI+T is housed in a 28-pin, 5mm × 5mm TQFN-EP package with exposed thermal pad (Package Code T2855+3). Pin functions are validated per Analog Devices' official pin configuration diagram for the 8-channel variant (MAX11123/MAX11124/MAX11125).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN7 | Analog Input Channels | Eight configurable inputs supporting single-ended, pseudo-differential (vs. AIN15/REF−), or fully differential pairs (e.g., AIN0/AIN1). |
| CNVST | Active-Low Conversion Start | Edge-triggered command initiating conversion sequence; compatible with microcontroller GPIO or timer outputs. |
| REF+/REF− | Differential Reference Inputs | Accept external 1V–VDD reference pair; REF+ requires 0.47µF bypass to GND for noise immunity. |
| SCLK, DIN, DOUT, CS | 3-Wire SPI Interface | 16MHz-compatible serial bus; DOUT active on SCLK falling edge; CS enables three-state output during idle. |
| VDD / OVDD / DGND / GND | Power & Ground Rails | VDD (2.35–3.6V) powers analog core; OVDD (1.5–3.6V) powers digital I/O; separate DGND/GND reduces digital noise coupling. |
| EOC | End-of-Conversion Indicator | Open-drain output pulled low after conversion completes in internal clock mode-used for interrupt-driven readout. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencing | User-programmable 256-step sequence eliminates MCU polling overhead and enables mixed-rate sampling (e.g., slow temp + fast vibration). |
| Internal FIFO (16-entry) | Buffers conversions at 1Msps while allowing slower host readout-decouples sampling rate from processor bandwidth. |
| Internal Averaging Mode | Improves SNR by up to 3dB for noisy DC or low-frequency signals without external firmware averaging. |
| AutoShutdown™ & Fast Wake-up | Reduces current to 2µA in full shutdown; resumes conversion in <2 cycles-ideal for duty-cycled sensor nodes. |
| Bipolar Input Ranges | Software-selectable ±VREF+/2 or ±VREF+ ranges simplify AC-coupled signal digitization (e.g., audio, vibration). |
Applications
| Industrial Motor Control | Portable Medical Monitor |
|---|---|
Use Scenario: Real-time acquisition of phase currents and bus voltage in BLDC inverter drives. IC Role / Device Role / Timing Role: 8-channel simultaneous-sampling-capable ADC capturing synchronized analog feedback for FOC algorithms. Use Value: 1.5MHz linear bandwidth ensures accurate representation of PWM-edge-induced transients; 12-bit resolution resolves <0.025% torque ripple. |
Use Scenario: Battery-powered ECG/SpO₂ monitor requiring multi-sensor analog digitization. IC Role / Device Role / Timing Role: Central ADC managing electrode inputs, temperature, and ambient light sensors with minimal power budget. Use Value: 5.4mW at 1Msps extends runtime; SampleSet™ sequences ECG (1ksps) and SpO₂ LED drivers (100ksps) autonomously. |
| Automotive Battery Management | High-Speed Test Equipment |
Use Scenario: Cell voltage and temperature monitoring in 12S BMS modules operating at 125°C under hood. IC Role / Device Role / Timing Role: High-accuracy, high-temp ADC interfacing with isolated voltage dividers and thermistors. Use Value: ±1 LSB INL over –40°C to +125°C ensures <1mV cell voltage error; REF+ input supports ratiometric sensing. |
Use Scenario: Modular DAQ card for automated test systems requiring flexible channel routing and timing. IC Role / Device Role / Timing Role: Reconfigurable front-end ADC supporting user-defined scan patterns and burst-mode acquisition. Use Value: 256-step SampleSet™ replaces FPGA-based sequencers; 16MHz SPI enables >1MB/s data streaming to host. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 8-channel, 16-bit, 1Msps, internal reference only; no SampleSet™; SPI interface with busy indicator instead of EOC. | Higher resolution but lacks programmable sequencing; better for static precision measurements than dynamic mixed-rate acquisition. | Select when absolute accuracy >12-bit and external reference is not required; avoid if autonomous channel sequencing is critical. |
| AD7928BRUZ | 8-channel, 12-bit, 1Msps, external reference supported; no FIFO, no SampleSet™; uses standard SPI with CNV pin. | No internal sequencing logic-requires continuous MCU intervention for channel selection; higher software overhead. | Choose for cost-sensitive designs where firmware handles sequencing; unsuitable for low-CPU-load or ultra-low-power wake-on-event use cases. |
Compared with ADS8688IPWR and AD7928BRUZ, the MAX11123ATI+T uniquely combines 12-bit accuracy, external reference flexibility, hardware-accelerated SampleSet™ sequencing, and 16-entry FIFO-enabling lower system latency and reduced processor load in multichannel real-time systems.
Availability
MAX11123ATI+T is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, and automotive battery management requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for MAX11123ATI+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 technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX11120–MAX11128 family was designed specifically for low-power, high-speed multichannel data acquisition in space- and energy-constrained systems-emphasizing hardware offload (SampleSet™, FIFO), wide supply range, and AEC-Q100 readiness.
FAQ
What is the maximum sample rate of the MAX11123ATI+T?
The MAX11123ATI+T achieves a guaranteed 1Msps (1 million samples per second) conversion rate in both internal and external clock modes. At 16MHz SCLK, externally clocked conversion completes in 1000ns per sample, with no pipeline delay-ensuring deterministic timing for real-time control loops.
Does the MAX11123ATI+T support differential input configurations?
Yes, the MAX11123ATI+T supports fully differential input pairs (e.g., AIN0/AIN1), pseudo-differential inputs referenced to AIN15/REF−, and single-ended inputs. Each analog input pair maintains true differential track-and-hold, preserving common-mode rejection and enabling noise-immune signal acquisition.
How does SampleSet™ reduce microcontroller overhead in the MAX11123ATI+T?
SampleSet™ allows users to predefine a 256-step channel sequence stored in on-chip memory. Once loaded, the MAX11123ATI+T autonomously cycles through the pattern-eliminating repeated SPI commands or GPIO toggling. This frees the MCU for computation or sleep, lowering system power and jitter.
What power supply requirements does the MAX11123ATI+T have?
The MAX11123ATI+T requires two independent supplies: VDD (2.35V–3.6V) for the analog core and OVDD (1.5V–3.6V) for digital I/O. Separating these rails allows direct interfacing with 1.8V/2.5V/3.3V processors while maintaining analog performance-no level shifters needed.
Is the MAX11123ATI+T qualified for automotive applications?
The MAX11123ATI+T operates across –40°C to +125°C and shares the same die and qualification flow as the AEC-Q100 Grade 1 qualified MAX11128ATI/V+. While MAX11123ATI+T itself is not AEC-Q100 certified, its design, process, and characterization align with automotive reliability standards-making it suitable for non-safety-critical under-hood subsystems.
MAX11123ATI+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:
- 4, 8
- 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:
- -
MAX11123ATI+T FAQ
1.How can I place an order for MAX11123ATI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11123ATI+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 MAX11123ATI+T reliable?
The price and inventory of MAX11123ATI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11123ATI+T is usually 5 days.
3.What payment methods are accepted for MAX11123ATI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11123ATI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11123ATI+T?
MAX11123ATI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11123ATI+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 MAX11123ATI+T?
For technical support, including MAX11123ATI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11123ATI+T requirements.
6.How does Aetrix verify that MAX11123ATI+T is sourced from the original manufacturer or authorized distributors?
All MAX11123ATI+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 MAX11123ATI+T meets industry standards.
7.What is the process for return or replacement of MAX11123ATI+T?
All MAX11123ATI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11123ATI+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 MAX11123ATI+T part is unused and in its original packaging.
Return procedure for MAX11123ATI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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