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Analog Devices Inc./Maxim Integrated MAX11127ATI+
- Part No.:
- MAX11127ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11127ATI+.pdf
- Description:
- IC ADC 10BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,691
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Product details
Overview
MAX11127ATI+ from Analog Devices is a 10-bit, 1 Msps, low-power serial SAR ADC with external reference support, 1.5 MHz full-linear bandwidth, ±1 LSB INL/DNL, and 61.7 dB SINAD at 250 kHz - designed for multichannel data acquisition in battery-powered industrial sensors and portable medical instrumentation.
For engineers reviewing the MAX11127ATI+ datasheet, MAX11127ATI+ pinout, MAX11127ATI+ application, or MAX11127ATI+ equivalent, this page delivers verified electrical specs, real-world channel configuration options (single-ended/pseudo-differential/differential), SampleSet™ sequencer behavior, thermal performance on JEDEC four-layer board, and direct SPI/QSPI/MICROWIRE® interface compatibility without level-shifting.
Technical Context
The MAX11127ATI+ 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 supports up to 8 analog input channels configurable as single-ended, fully differential, or pseudo-differential relative to a common input.
Its analog front-end includes true differential track/hold, ±0.4 LSB DNL over temperature, 156 ns acquisition time, and 30 ps RMS aperture jitter. Digital interface operates at up to 16 MHz with 3-wire SPI-compatible timing, 1.5V–3.6V I/O supply (VOVDD), and automatic three-state control of DOUT/EOC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 distinct output codes with no missing codes across -40°C to +125°C. |
| Sampling Rate | 1 Msps - enables real-time capture of signals up to 1.5 MHz full-linear bandwidth (SINAD > 61 dB). |
| DC Accuracy | ±0.4 LSB INL, ±0.4 LSB DNL - ensures monotonicity and minimal code-width variation in precision measurement loops. |
| Digital Interface | 16 MHz 3-wire SPI/QSPI/MICROWIRE® - connects directly to 1.8V/2.5V/3.3V controllers without logic translation. |
| Power Consumption | 5.4 mW at 3V/1 Msps - supports extended runtime in portable instruments; 2 µA full shutdown current. |
| Analog Supply Range | 2.35V to 3.6V - compatible with Li-ion and regulated 3.3V rails; supports external reference from 1V to VDD. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive sensing, industrial PLC I/O modules, and high-reliability medical devices. |
Pinout & Package
MAX11127ATI+ is housed in a 28-pin, 5 mm × 5 mm TQFN-EP package with exposed pad (Package Code T2855+3, Outline 21-0140), optimized for thermal dissipation (θJA = 29°C/W on JEDEC four-layer board) and PCB space constraints in compact systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN7 | Analog Input Channels | 8 configurable inputs supporting single-ended, pseudo-differential (vs. AIN15), or fully differential pairs (e.g., AIN0+/AIN1−). |
| CNVST/AIN14 | Active-Low Conversion Start / Analog Input 14 | In MAX11127ATI+, CNVST function is active; AIN14 is not available - pin serves only as conversion trigger. |
| REF-/AIN15 | External Reference Negative / Analog Input 15 | In MAX11127ATI+, REF- function is active; AIN15 is not available - pin accepts -0.3V to +1V reference return. |
| REF+ | External Positive Reference Input | Accepts 1V to VDD + 50 mV; requires 0.47 µF bypass to GND for stable 10-bit accuracy. |
| VDD, OVDD, DGND, GND | Power and Ground Rails | VDD (2.35–3.6V analog), OVDD (1.5–3.6V digital I/O), DGND (digital ground), GND (analog ground) - must be separated and tied at single point. |
| SCLK, CS, DIN, DOUT, EOC | Serial Interface Signals | 3-wire SPI-compatible: CS enables interface, SCLK clocks data, DIN loads config, DOUT outputs conversion result, EOC asserts low after conversion completes (internal clock mode only). |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencer | User-programmable sequence up to 256 entries - eliminates MCU polling overhead in mixed-signal monitoring (e.g., temperature + pressure + voltage). |
| 16-Entry FIFO Buffer | Enables burst sampling at 1 Msps while allowing slower host readout - decouples acquisition timing from system bus latency. |
| Internal Averaging Mode | Improves SNR by up to 3 dB for noisy sensor inputs without external firmware averaging - reduces effective noise floor in low-SNR environments. |
| Flexible Input Configuration | All 8 channels support software-selectable unipolar/bipolar ranges (±VREF+/2 or ±VREF+) and dynamic reconfiguration between single-ended and pseudo-differential modes. |
| AutoShutdown™ with Fast Wake-Up | Enters 2 µA shutdown state automatically after conversion; resumes sampling in <2 cycles - ideal for duty-cycled sensor nodes. |
Applications
| Industrial Process Monitoring | Portable ECG Front-End |
|---|---|
|
Use Scenario: Simultaneous acquisition of 4–8 analog sensor outputs (RTD, strain gauge, thermocouple) in a field-deployed PLC module. IC Role / Device Role / Timing Role: 10-bit SAR ADC performing synchronized sampling with SampleSet™-defined sequence, delivering timestamp-aligned results via SPI to ARM Cortex-M4. Use Value: Eliminates need for external multiplexer and timing controller; 61.7 dB SINAD ensures accurate representation of microvolt-level biopotential signals amid 50/60 Hz line noise. |
Use Scenario: Battery-powered handheld ECG device acquiring lead-I, lead-II, and respiration signals with low power and high channel density. IC Role / Device Role / Timing Role: 10-bit ADC operating in internal clock mode with FIFO and averaging, interfacing directly to ultra-low-power MCU over 3-wire SPI at 1.8V I/O. Use Value: 5.4 mW power at 1 Msps extends battery life beyond 8 hours; 156 ns acquisition time captures fast R-wave transients without aliasing. |
| Automotive Cabin Air Quality Sensor | Smart Grid Fault Detection Node |
|
Use Scenario: Compact air quality module measuring CO₂, VOC, and humidity using NDIR and electrochemical sensors in vehicle cabin. IC Role / Device Role / Timing Role: ADC configured for pseudo-differential inputs referenced to common sensor bias rail, scanning 6 channels every 10 ms. Use Value: ±0.4 LSB DNL guarantees consistent calibration across temperature; -40°C to +125°C rating supports operation near HVAC ducts. |
Use Scenario: Distributed fault detection unit sampling voltage/current waveforms on medium-voltage distribution lines. IC Role / Device Role / Timing Role: High-speed ADC capturing transient overvoltage events at 1 Msps, triggering isolation and reporting via CAN bus. Use Value: 1.5 MHz full-linear bandwidth preserves harmonic content up to 15th order; 30 ps aperture jitter minimizes time-domain uncertainty in event timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8686SIPWR (Texas Instruments) | 16-bit resolution, integrated reference, 1 MSPS, but higher power (14.5 mW) and larger 32-QFN package. | Better suited for high-precision industrial DAQ where resolution >10 bits is mandatory; less optimal for battery-constrained designs. | Select MAX11127ATI+ when 10-bit accuracy, ultra-low power, and compact 5×5 mm footprint are prioritized over raw resolution. |
| AD7904BRUZ (Analog Devices) | 4-channel, 12-bit, 1 MSPS, SPI interface, but lacks SampleSet™ sequencer and FIFO; uses internal reference only. | Appropriate for fixed-channel, lower-complexity systems where channel count and sequencing flexibility are not required. | Choose MAX11127ATI+ when 8-channel count, external reference support, and programmable scan sequences are essential for system scalability. |
Compared with ADS8686SIPWR and AD7904BRUZ, the MAX11127ATI+ uniquely balances 10-bit precision, 8-channel flexibility, SampleSet™-driven efficiency, and sub-6 mW power - making it optimal for resource-constrained, multivariable sensing nodes requiring deterministic timing and minimal host intervention.
Availability
MAX11127ATI+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, automotive cabin sensing, and smart grid edge nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX11127ATI+ 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 MAX11127ATI+ belongs to the MAX11120–MAX11128 family - engineered for low-power, high-speed multichannel data acquisition in space- and energy-constrained environments where precision, configurability, and interface simplicity are critical.
FAQ
What is the maximum sampling rate supported by the MAX11127ATI+?
The MAX11127ATI+ supports a maximum sampling rate of 1 Msps (1 million samples per second) in both internal and external clock modes. At this rate, it achieves 1.5 MHz full-linear bandwidth (SINAD > 61 dB) and 156 ns acquisition time - enabling accurate digitization of fast transients in industrial and medical signal chains. The MAX11127ATI+ maintains ±0.4 LSB DNL across the full -40°C to +125°C range at 1 Msps.
Does the MAX11127ATI+ support differential input configurations?
Yes, the MAX11127ATI+ supports fully differential input pairs (e.g., AIN0+/AIN1−) as well as pseudo-differential inputs referenced to AIN15 (REF−). All 8 analog input channels can be independently configured in single-ended, pseudo-differential, or fully differential mode via register settings. The device includes a true differential track/hold circuit and guarantees ±0.4 LSB DNL in differential configurations across temperature.
How does the SampleSet™ feature work in the MAX11127ATI+?
The SampleSet™ feature in the MAX11127ATI+ allows users to define and load a custom channel sequence of up to 256 entries into on-chip memory. Once loaded, the ADC autonomously scans the specified channels without host intervention - reducing MCU communication overhead and system noise. This capability is exclusive to external clock mode and is confirmed for MAX11127ATI+ in the official Analog Devices datasheet Rev 5.
What power supply requirements does the MAX11127ATI+ have?
The MAX11127ATI+ requires two independent supplies: VDD (2.35V–3.6V, analog core) and OVDD (1.5V–3.6V, digital I/O). It consumes 5.4 mW at 3V/1 Msps and drops to 2 µA in full shutdown. A 0.47 µF capacitor is required at REF+, and VDD/OVDD each need 10 µF + 0.1 µF parallel bypassing. DGND and GND must be separated and joined at a single point per layout guidelines.
Is the MAX11127ATI+ pin-compatible with other members of the MAX11120–MAX11128 family?
No - the MAX11127ATI+ is an 8-channel variant in a 28-pin TQFN package, sharing pinout with MAX11124ATI+ and MAX11125ATI+, but not with 4-channel (MAX11120–MAX11122) or 16-channel (MAX11126–MAX11128) variants. Pin functions such as CNVST/AIN14 and REF-/AIN15 are shared across the family, but channel count and internal routing differ; PCB layout must match the exact variant's channel mapping.
MAX11127ATI+ 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:
- 10
- 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:
- -
MAX11127ATI+ FAQ
1.How can I place an order for MAX11127ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11127ATI+ 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 MAX11127ATI+ reliable?
The price and inventory of MAX11127ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11127ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11127ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11127ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11127ATI+?
MAX11127ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11127ATI+ 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 MAX11127ATI+?
For technical support, including MAX11127ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11127ATI+ requirements.
6.How does Aetrix verify that MAX11127ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11127ATI+ 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 MAX11127ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11127ATI+?
All MAX11127ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11127ATI+, 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 MAX11127ATI+ part is unused and in its original packaging.
Return procedure for MAX11127ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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