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Analog Devices Inc./Maxim Integrated MAX11129ATI+
- Part No.:
- MAX11129ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11129ATI+.pdf
- Description:
- IC ADC 10BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,055
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Product details
Overview
MAX11129ATI+ from Maxim Integrated is a 12-bit, 16-channel, 3Msps successive approximation register (SAR) analog-to-digital converter with external reference support, 1.5MHz full-linear bandwidth, and integrated FIFO. It operates from 2.35V–3.6V, consumes 15.2mW at 3Msps, and supports single-ended, fully differential, and pseudo-differential input configurations for high-accuracy data acquisition in portable instrumentation.
For engineers reviewing the MAX11129ATI+ datasheet, MAX11129ATI+ pinout, MAX11129ATI+ application, or MAX11129ATI+ equivalent, this page delivers verified specifications, validated pin functions, confirmed multichannel sequencing capability (SampleSet), real-world SNR performance (70dB SINAD @ 500kHz), and precise thermal and timing behavior across –40°C to +125°C.
Technical Context
The MAX11129ATI+ implements a SAR architecture with dual clock modes: internal clock mode enables 16-entry FIFO buffering and on-chip averaging to improve SNR, while external clock mode supports SampleSet programmable channel sequencing up to 256 entries. Its analog multiplexer features true differential track/hold with configurable input topology per channel.
It delivers no missing codes, ±1 LSB INL/DNL over temperature, and guaranteed 70dB SINAD at 500kHz input frequency. The 48MHz 3-wire SPI/QSPI/MICROWIRE-compatible interface operates with CPOL=CPHA=1 and supports channel ID embedding in output data when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes with 1 LSB = VREF+/4096 for precision measurement systems. |
| Sampling Rate | 3Msps - enables real-time capture of signals up to 1.5MHz full-linear bandwidth without pipeline delay. |
| SINAD | 70dB @ 500kHz - ensures high-fidelity digitization of medium-frequency sensor or control-loop signals. |
| Power Dissipation | 15.2mW @ 3V/3Msps - supports battery-powered operation with <2µA full shutdown current. |
| Input Configuration | 16 single-ended / 8 fully differential / 15 pseudo-differential - allows flexible signal routing without external mux or level-shifting. |
| Reference Support | External differential (REF+/REF−) - enables ratiometric accuracy and rejection of common-mode noise in noisy environments. |
| Serial Interface | 48MHz 3-wire SPI/QSPI/MICROWIRE - connects directly to microcontrollers without glue logic; supports CHAN_ID flag for unambiguous channel identification. |
Pinout & Package
MAX11129ATI+ is housed in a 28-pin, 5mm × 5mm TQFN package with exposed pad (EP), optimized for thermal performance (θJA = 29°C/W) and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN13 | Analog Input Channels | 14 dedicated single-ended inputs; configurable as 8 differential pairs or 15 pseudo-differential inputs referenced to REF−/AIN15. |
| CNVST/AIN14 | Active-Low Conversion Start / Analog Input 14 | Hardware-triggered sampling initiation; doubles as 15th analog input when not used for conversion control. |
| REF+/REF−/AIN15 | External Reference Positive / Negative / Analog Input 15 | REF+ sets full-scale range; REF− enables true differential referencing; AIN15 serves as common pseudo-differential reference point. |
| CS, SCLK, DIN, DOUT, EOC | 3-Wire Serial Interface + End-of-Conversion Flag | CS enables serial communication; SCLK clocks data at up to 48MHz; DOUT outputs 16-bit frame (4-bit channel ID + 12-bit result); EOC asserts low only in internal clock mode. |
| VDD, OVDD, DGND, GND | Power and Ground Rails | VDD powers analog core (2.35–3.6V); OVDD powers I/O (1.5–3.6V); separate DGND/GND reduce digital noise coupling into analog domain. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet Channel Sequencer | User-programmable 256-step sequence reduces MCU overhead and enables mixed-rate sampling (e.g., slow temperature + fast vibration channels). |
| 16-Entry FIFO Buffer | Allows burst sampling at 3Msps while host reads data at lower rate-eliminates timing-critical interrupt servicing during high-speed acquisition. |
| Configurable Input Topology | Per-channel selection of single-ended, fully differential, or pseudo-differential mode via register control-no hardware rework needed for signal type changes. |
| Internal Averaging | Improves effective resolution and SNR for low-level or noisy signals without external filtering or post-processing. |
| AutoShutdown & Fast Wake-up | Reduces idle power to 1.7µW (typical) with <2µs wake-up time-ideal for duty-cycled sensor nodes and portable diagnostics. |
Applications
| High-Speed Data Acquisition | Industrial Process Monitoring |
|---|---|
|
Use Scenario: Simultaneous sampling of 16 sensor channels (e.g., strain gauges, thermocouples, accelerometers) in automated test equipment. IC Role / Device Role / Timing Role: Primary SAR ADC performing synchronized conversions with SampleSet sequencing and FIFO buffering to decouple sampling from host readout. Use Value: Eliminates need for external FIFO or FPGA-based data aggregation; maintains 3Msps throughput with deterministic latency under microcontroller control. |
Use Scenario: Real-time monitoring of motor phase currents, voltage rails, and temperature in PLC-controlled factory machinery. IC Role / Device Role / Timing Role: High-accuracy, multi-channel front-end ADC interfacing directly to isolation amplifiers and shunt resistors in safety-critical control loops. Use Value: ±1 LSB INL/DNL and 70dB SINAD ensure compliance with IEC 61000-4-30 Class A power quality standards for harmonic analysis. |
| Battery-Powered Medical Devices | Portable Test & Measurement |
|
Use Scenario: Portable ECG or EEG recorder acquiring biopotential signals with low-noise, low-power, and compact form factor requirements. IC Role / Device Role / Timing Role: Low-voltage (2.35V), low-power ADC supporting pseudo-differential inputs referenced to body-driven right-leg drive (RLD) node. Use Value: 15.2mW active power and <2µA shutdown current extend battery life; 1.5MHz full-linear bandwidth captures QRS complex fidelity without aliasing. |
Use Scenario: Handheld oscilloscope or spectrum analyzer requiring high dynamic range and multichannel flexibility in field-deployable units. IC Role / Device Role / Timing Role: Dual-role ADC providing both time-domain sampling (3Msps) and frequency-domain analysis (via undersampling up to 50MHz -3dB BW). Use Value: External differential reference support enables ratiometric accuracy against calibrated reference sources; 48MHz SPI interface simplifies FPGA or ARM Cortex-M4 integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit, 500ksps, SPI interface, internal reference, no FIFO or SampleSet | Higher resolution but lower speed; lacks programmable sequencing and FIFO-requires host CPU coordination for multichannel reads | Select when absolute resolution > speed, and system has sufficient processing headroom for channel management. |
| AD7960BCPZ | 18-bit, 5Msps, LVDS interface, external reference, no integrated sequencer or FIFO | Higher speed/resolution but requires LVDS receiver and higher power (45mW); no native channel sequencing or low-power shutdown modes | Select for ultra-high-fidelity applications where SNR >75dB is mandatory and board space allows LVDS layout complexity. |
Compared with ADS8688IPWR and AD7960BCPZ, MAX11129ATI+ uniquely balances 12-bit precision, 3Msps throughput, integrated FIFO, SampleSet sequencing, and sub-16mW power-making it optimal for embedded systems needing autonomous multichannel acquisition without host intervention.
Availability
MAX11129ATI+ is available at Aetrix Electronics and suitable for high-speed data acquisition systems, industrial process monitoring, and battery-powered medical devices requiring stable component supply, extended temperature operation (–40°C to +125°C), and long-term production continuity.
Supply support for MAX11129ATI+ 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, medical, and automotive applications-with emphasis on low power, small size, and high reliability.
The MAX11129–MAX11132 family was engineered for portable and space-constrained data-acquisition systems requiring multichannel flexibility, low power, and seamless microcontroller integration via standard serial interfaces.
FAQ
What is the maximum sampling rate supported by MAX11129ATI+?
The MAX11129ATI+ supports a maximum sampling rate of 3Msps in both internal and external clock modes. At this rate, conversion time is 333ns (external clock, 48MHz SCLK) or 2.1µs (internal clock), with guaranteed 70dB SINAD performance at 500kHz input frequency and no pipeline delay-enabling true real-time acquisition for closed-loop control and transient capture.
Does MAX11129ATI+ support differential input configurations?
Yes, MAX11129ATI+ supports fully differential, pseudo-differential, and single-ended input modes. In fully differential mode, it accepts inputs across AINn+/AINn− pairs with bipolar ranges of ±VREF+/2 or ±VREF+, selectable via the RANGE register. Pseudo-differential mode uses REF−/AIN15 as common reference for up to 15 channels, enabling noise-rejecting measurements without matched differential drivers.
How does the SampleSet feature work in MAX11129ATI+?
The SampleSet feature in MAX11129ATI+ is a user-programmable channel sequencer allowing up to 256 unique conversion steps. It operates in external clock mode and offloads channel selection from the host controller-enabling mixed-rate sampling (e.g., temperature every 100ms, vibration every 100µs) without CPU intervention. Sequence definitions are loaded via SPI before acquisition begins.
What power-saving modes does MAX11129ATI+ offer?
MAX11129ATI+ provides AutoShutdown, full shutdown, and AutoStandby modes. Full shutdown draws just 1.3µA (typical), AutoStandby reduces power to 4.35mW at 2.35V/3Msps, and AutoShutdown dynamically enters low-power state between conversions. All modes retain register settings and support fast wake-up (<2µs), making MAX11129ATI+ ideal for energy-harvesting and battery-operated edge sensors.
Is MAX11129ATI+ compatible with standard SPI microcontrollers?
Yes, MAX11129ATI+ is fully compatible with standard SPI master interfaces operating at CPOL=CPHA=1 (SCLK idle high, data sampled on falling edge). It supports 48MHz SCLK, 3-wire operation (CS/SCLK/DIN/DOUT), and optional 4-bit channel ID embedding. No level shifters are needed-OVDD supports 1.5V–3.6V I/O, matching modern low-voltage MCUs like STM32L4 or nRF52840.
MAX11129ATI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 3M
- 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:
- -
MAX11129ATI+ FAQ
1.How can I place an order for MAX11129ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11129ATI+ 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 MAX11129ATI+ reliable?
The price and inventory of MAX11129ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11129ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11129ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11129ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11129ATI+?
MAX11129ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11129ATI+ 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 MAX11129ATI+?
For technical support, including MAX11129ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11129ATI+ requirements.
6.How does Aetrix verify that MAX11129ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11129ATI+ 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 MAX11129ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11129ATI+?
All MAX11129ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11129ATI+, 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 MAX11129ATI+ part is unused and in its original packaging.
Return procedure for MAX11129ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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