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Analog Devices Inc./Maxim Integrated MAX11128ATI+
- Part No.:
- MAX11128ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11128ATI+.pdf
- Description:
- IC ADC 12BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:563
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Product details
Overview
MAX11128ATI+ from Analog Devices is a 12-bit, 16-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 to 3.6V, consumes 5.4mW at 1Msps, and features ±1 LSB INL/DNL over –40°C to +125°C - enabling high-accuracy data acquisition in battery-powered industrial sensors.
For engineers reviewing the MAX11128ATI+ datasheet, MAX11128ATI+ pinout, MAX11128ATI+ application, or MAX11128ATI+ equivalent, this page delivers verified electrical specs, TQFN-28 package layout, real-world use cases in closed-loop control and medical instrumentation, and two validated alternative ADCs with documented functional trade-offs.
Technical Context
The MAX11128ATI+ implements a successive-approximation register (SAR) architecture with dual clock modes: internal clock (enabling FIFO buffering and on-chip averaging for SNR improvement) and external clock (supporting SampleSet™ programmable channel sequencing up to 256 entries). Its analog front-end supports single-ended, pseudo-differential, and true differential input configurations across all 16 channels.
It integrates a 16-entry FIFO, AutoShutdown™ with 2μA full-shutdown current, and a 16MHz 3-wire SPI-/QSPI-/MICROWIRE-compatible serial interface. Input voltage ranges are software-selectable bipolar (±VREF+/2 or ±VREF+) or unipolar (0 to VREF+), with absolute input limits of –0.1V to VREF+ + 0.1V relative to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision measurement systems. |
| Sampling Rate | 1Msps - enables real-time capture of fast transients in motor control feedback loops and ultrasound front-ends. |
| Full-Linear Bandwidth | 1.5MHz - maintains SINAD > 70dB up to 1.5MHz, supporting accurate digitization of wideband sensor outputs. |
| INL / DNL | ±1 LSB / ±1 LSB - ensures monotonicity and minimal code-width variation across temperature, critical for closed-loop stability. |
| Power Dissipation | 5.4mW at 1Msps (VDD = 3V) - allows continuous high-speed sampling in thermally constrained portable instruments. |
| Supply Range | VDD: 2.35V–3.6V; OVVDD: 1.5V–3.6V - supports direct interfacing with 1.8V/2.5V/3.3V logic without level shifters. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and downhole sensing environments. |
Pinout & Package
MAX11128ATI+ is housed in a 28-pin, 5mm × 5mm TQFN-EP package (Package Code T2855+3, Outline 21-0140) with exposed pad connected to GND for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN13 | Analog Input Channels | 14 dedicated single-ended inputs; configurable as fully differential (8 pairs) or pseudo-differential (15 vs. common AIN15). |
| CNVST/AIN14 | Conversion Start / Analog Input 14 | Active-low hardware trigger for conversion; doubles as 15th analog input when not used as CNVST. |
| REF-/AIN15 | Reference Negative / Analog Input 15 | Differential reference return; also serves as 16th analog input in single-ended mode. |
| REF+ | Positive Reference Input | Accepts external reference from 1V to VDD; requires 0.47µF bypass capacitor for noise immunity. |
| VDD, OVDD, DGND, GND | Power & Ground Rails | VDD powers core analog circuitry; OVDD powers digital I/O; separate DGND/GND reduces digital noise coupling. |
| SCLK, CS, DIN, DOUT, EOC | 3-Wire Serial Interface | 16MHz SPI-compatible interface; EOC asserts low only in internal-clock mode to signal valid data ready. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencing | User-programmable 256-step sequence eliminates microcontroller polling overhead in multichannel monitoring. |
| 16-Entry FIFO Buffer | Enables burst sampling at 1Msps while allowing slower host readout - decouples acquisition and processing timing. |
| Internal Averaging Mode | Improves SNR by averaging multiple conversions per sample - effective for suppressing low-frequency noise in sensor signals. |
| Flexible Input Configuration | Per-channel selection of single-ended, pseudo-differential, or true differential input - simplifies mixed-signal system design. |
| AutoShutdown™ with 2μA Current | Reduces standby power to sub-microwatt levels between conversions - extends battery life in intermittent-sampling applications. |
Applications
| Industrial Motor Control | Portable Medical Ultrasound |
|---|---|
Use Scenario: Real-time phase current and bus voltage sampling in servo drives with field-oriented control. IC Role / Device Role / Timing Role: 16-channel simultaneous sampling ADC providing synchronized current/voltage feedback at 1Msps for PWM update cycles. Use Value: 1.5MHz full-linear bandwidth preserves harmonic content of distorted current waveforms; ±1 LSB INL prevents torque ripple from quantization error. |
Use Scenario: Digitizing RF echo signals from multi-element transducer arrays in handheld ultrasound probes. IC Role / Device Role / Timing Role: High-SNR, low-latency ADC capturing 250kHz–1MHz analog beamformed outputs before digital beamforming. Use Value: 70dB SINAD at 250kHz ensures diagnostic image clarity; 5.4mW power enables >2-hour battery operation per charge. |
| Automotive Battery Management | High-Speed Data Loggers |
Use Scenario: Monitoring cell voltages, temperatures, and pack currents in EV traction battery packs operating at –40°C to +125°C. IC Role / Device Role / Timing Role: Precision 12-bit ADC with AEC-Q100 qualified variant (MAX11128ATI/V+) performing periodic cell scanning. Use Value: Guaranteed ±1 LSB INL over full temperature range ensures SOC estimation accuracy; 2μA shutdown current minimizes parasitic drain. |
Use Scenario: Capturing transient vibration, pressure, and strain data from rotating machinery during predictive maintenance audits. IC Role / Device Role / Timing Role: Standalone ADC logging bursts of 1Msps data into local SRAM before wireless upload. Use Value: Integrated FIFO buffers 16 samples without host intervention; SampleSet™ sequences 12 sensor channels automatically. |
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™ or FIFO; SPI interface with busy indicator. | Better resolution but lacks programmable sequencing and low-power shutdown - suited for static calibration, not dynamic channel scanning. | Select when absolute accuracy > sequencing flexibility; verify external reference compatibility is unnecessary. |
| AD7961BCPZ | 16-bit, 5Msps, 8-channel, no FIFO, no internal averaging; requires external sequencer; higher power (45mW). | Higher speed/resolution but demands more host resources and PCB area; no integrated low-power modes. | Choose for ultra-high-fidelity capture where power and integration are secondary to raw performance. |
Compared with ADS8688IPWR and AD7961BCPZ, the MAX11128ATI+ uniquely balances 12-bit precision, 16-channel flexibility, 1Msps throughput, and ultra-low power - making it optimal for embedded systems requiring autonomous multichannel acquisition with minimal MCU involvement.
Availability
MAX11128ATI+ is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, automotive battery monitoring, and high-speed data logging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11128ATI+ 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-channel-count data acquisition in space-constrained, battery-operated, and thermally demanding applications - emphasizing integration, configurability, and guaranteed performance across –40°C to +125°C.
FAQ
What is the maximum sampling rate supported by the MAX11128ATI+?
The MAX11128ATI+ supports a maximum sampling rate of 1 million samples per second (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), and power dissipation is 5.4mW with a 3V supply. This rate is maintained across the full –40°C to +125°C operating temperature range.
Does the MAX11128ATI+ require an external reference voltage?
Yes, the MAX11128ATI+ requires an external differential reference: REF+ must be supplied between 1V and VDD, and REF−/AIN15 serves as the reference return. The device does not include an internal reference; however, it supports user-configurable bipolar (±VREF+/2 or ±VREF+) and unipolar (0 to VREF+) input ranges based on the RANGE bit setting.
How many analog input channels does the MAX11128ATI+ support, and how are they configured?
The MAX11128ATI+ supports up to 16 analog input channels (AIN0–AIN13, CNVST/AIN14, REF−/AIN15). These can be configured as 16 single-ended inputs, 8 fully differential pairs, or 15 pseudo-differential inputs relative to a common channel. Configuration is controlled via register settings and does not require external hardware changes.
What is the purpose of the SampleSet™ feature in the MAX11128ATI+?
SampleSet™ is a user-programmable channel sequencer that allows up to 256 unique analog input sequences to be loaded into the MAX11128ATI+. It operates autonomously in external clock mode, eliminating continuous MCU polling and reducing system-level communication overhead - especially valuable in multichannel, mixed-rate sensor monitoring applications.
Is the MAX11128ATI+ pin-compatible with other devices in the MAX11120–MAX11128 family?
No - the MAX11128ATI+ is not pin-compatible with lower-channel variants (e.g., MAX11122ATI+, MAX11125ATI+) despite sharing the same 28-pin TQFN package. Pin functions differ significantly: AIN14 and AIN15 are repurposed as CNVST/AIN14 and REF−/AIN15 on MAX11128ATI+, whereas those pins are grounded or unused on 4- and 8-channel versions.
MAX11128ATI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- 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:
- -
MAX11128ATI+ FAQ
1.How can I place an order for MAX11128ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11128ATI+ 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 MAX11128ATI+ reliable?
The price and inventory of MAX11128ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11128ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11128ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11128ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11128ATI+?
MAX11128ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11128ATI+ 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 MAX11128ATI+?
For technical support, including MAX11128ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11128ATI+ requirements.
6.How does Aetrix verify that MAX11128ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11128ATI+ 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 MAX11128ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11128ATI+?
All MAX11128ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11128ATI+, 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 MAX11128ATI+ part is unused and in its original packaging.
Return procedure for MAX11128ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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