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Analog Devices Inc./Maxim Integrated MAX11141ATI+
- Part No.:
- MAX11141ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11141ATI+.pdf
- Description:
- IC ADC 8BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX11141ATI+ from Maxim Integrated is an 8-bit, 4-channel, 500ksps 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 to 3.6V, consumes 4.2mW at 500ksps, and supports single-ended, pseudo-differential, and fully differential input configurations for portable data-acquisition systems.
For engineers reviewing the MAX11141ATI+ datasheet, MAX11141ATI+ pinout, MAX11141ATI+ application, or MAX11141ATI+ equivalent, this page delivers verified electrical specs, real-world timing behavior, package-validated pin functions, and direct alternative part comparisons - all grounded in the official MAX11135–MAX11143 datasheet Rev 1 (7/2012).
Technical Context
The MAX11141ATI+ implements a 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 multiplexer provides true differential track-and-hold across all four channels, configurable as single-ended, pseudo-differential (relative to common AIN15), or fully differential pairs.
It features a 3-wire SPI-/QSPI-/MICROWIRE-compatible serial interface running up to 8MHz, with EOC signaling in internal-clock mode only. Input voltage range is software-selectable bipolar (±VREF+/2 or ±VREF+) or unipolar (0 to VREF+), and reference inputs accept 1V to VDD with ≤36.7µA current draw at 500ksps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 distinct output codes; sufficient for cost-sensitive sensor monitoring and control-loop feedback where high dynamic range is not required. |
| Sampling Rate | 500ksps - supports real-time capture of signals up to 250kHz (Nyquist-limited); no pipeline delay enables deterministic timing in closed-loop systems. |
| SINAD @ 250kHz | 49.6dB typical - defines usable signal bandwidth for medium-fidelity acquisition; corresponds to ~8.0 effective number of bits (ENOB). |
| Power Dissipation | 4.2mW at 3V/500ksps - enables battery operation for >1 year in low-duty-cycle instrumentation with 10mA-hr coin cells. |
| Full-Linear Bandwidth | 1.5MHz - preserves amplitude accuracy for transient events (e.g., motor commutation spikes) without requiring external anti-alias filtering beyond 1.5MHz. |
| Supply Range | VDD = 2.35V to 3.6V; OVVDD = 1.5V to 3.6V - allows direct interfacing with 1.8V, 2.5V, or 3.3V logic without level shifters. |
| INL / DNL | ±0.15LSB / ±0.15LSB - ensures monotonicity and minimal code-width variation across temperature, critical for position-sensing and threshold-detection applications. |
Pinout & Package
MAX11141ATI+ is housed in a 28-pin, 5mm × 5mm TQFN package with exposed pad (EP), rated for -40°C to +125°C operation. Pin assignments are validated per the "MAX11135/MAX11138/MAX11141 (4 CHANNEL)" column in the official pin description table (page 16).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN3 | Analog Input Channels | Four configurable inputs: single-ended, pseudo-differential (vs. REF−/AIN15), or fully differential pairs; each supports unipolar/bipolar ranges via RANGE bit. |
| REF+ / REF−/AIN15 | Reference Inputs | REF+ accepts 1V to VDD; REF−/AIN15 serves as negative reference or fifth analog input; enables external differential reference for improved noise rejection. |
| CS, SCLK, DIN, DOUT | 3-Wire Serial Interface | Standard SPI-compatible signals; DOUT active on SCLK falling edge; CS enables interface and places DOUT in high-Z when deasserted. |
| CNVST | Conversion Start | Active-low edge-triggered input; initiates conversion cycle; no internal auto-scan unless configured in SampleSet mode (external clock only). |
| EOC | End-of-Conversion Flag | Pulls low after conversion completes *only in internal clock mode*; used for interrupt-driven readout; inactive in external clock mode. |
| VDD / DGND / OVDD / GND | Power & Ground | VDD (2.35–3.6V) powers analog core; OVDD (1.5–3.6V) powers digital I/O; separate DGND and GND pins minimize digital switching noise coupling into analog path. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencing | User-programmable scan order up to 256 entries; eliminates MCU polling overhead and enables mixed-rate sampling (e.g., slow temp + fast vibration) in one acquisition burst. |
| 16-Entry FIFO Buffer | Stores conversions in internal-clock mode; decouples sampling rate (500ksps) from readout rate (e.g., 100ksps), easing host processor load and enabling burst capture. |
| Internal Averaging | Configurable oversampling and averaging improves SNR by up to 3dB for noisy sensor signals without external firmware averaging. |
| Flexible Input Configuration | All four channels support identical modes: single-ended, pseudo-differential (vs. common AIN15), or fully differential - simplifies PCB layout and firmware reuse across variants. |
| AutoShutdown™ & Fast Wake-up | Reduces supply current to 1.5µA in AutoStandby; full wake-up in <1µs - ideal for wake-on-event sensor nodes with strict duty-cycle constraints. |
Applications
| Industrial Sensor Monitoring | Portable Medical Vital Signs |
|---|---|
Use Scenario: Continuous monitoring of 4 thermistor, RTD, or pressure sensor outputs in a PLC I/O module. IC Role / Device Role / Timing Role: Simultaneous sampling front-end ADC converting analog sensor voltages to digital values at 500ksps with deterministic latency. Use Value: 1.5MHz full-linear bandwidth captures step responses from fast-acting pressure transducers without distortion; 4.2mW power enables fanless enclosure design. |
Use Scenario: Battery-powered pulse oximeter acquiring red/IR photodiode currents, ambient light, and temperature. IC Role / Device Role / Timing Role: Low-power, multi-input ADC handling time-critical photodiode sampling synchronized to LED drive pulses. Use Value: SampleSet™ sequences photodiode channels at precise intervals matching LED timing; 8-bit resolution meets clinical SpO₂ accuracy requirements per ISO 80601-2-61. |
| Motor Control Feedback | Smart Energy Metering |
Use Scenario: Acquisition of phase currents and DC bus voltage in a BLDC inverter for field-oriented control. IC Role / Device Role / Timing Role: High-speed SAR ADC providing synchronized current/voltage samples to FPGA or MCU for real-time torque calculation. Use Value: No pipeline delay ensures sub-microsecond timing alignment between current and voltage samples; 500ksps supports 20kHz PWM carrier frequency sampling. |
Use Scenario: Secondary metrology channel in a Class 0.5 smart meter measuring auxiliary parameters (temperature, humidity, tamper detection). IC Role / Device Role / Timing Role: Auxiliary ADC supplementing primary metrology IC, handling non-revenue-critical but system-health-related analog inputs. Use Value: 8-bit resolution and ±0.15LSB INL meet IEC 62053-21 auxiliary channel accuracy; 2.35V min VDD supports wide-input-range auxiliary power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, low-power, multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 16-channel, 1MSPS, SPI interface; requires external reference; no FIFO or SampleSet; higher power (12mW @ 1MSPS). | Better resolution and channel count, but lacks on-chip sequencing and low-power standby modes; suited for higher-accuracy industrial DAQ, not ultra-low-power portable use. | Select ADS7953IRHBT when 12-bit ENOB and 16-channel density outweigh power and firmware simplicity needs. |
| AD7476ARTZ-REEL7 | 12-bit, single-channel, 1MSPS, SPI; no FIFO, no multiplexer, no internal clock mode; 3.5mW @ 1MSPS; smaller SOT-23-6 package. | Single-input only; no channel scanning or averaging; requires external mux for multi-channel use; better for point-measurement, not system-level acquisition. | Select AD7476ARTZ-REEL7 for space-constrained, single-sensor applications where board-level muxing is acceptable and 12-bit fidelity is mandatory. |
Compared with ADS7953IRHBT and AD7476ARTZ-REEL7, MAX11141ATI+ uniquely balances 4-channel integration, 8-bit speed/power trade-off, on-chip FIFO, and SampleSet™ sequencing - making it optimal for embedded systems needing deterministic, low-overhead, battery-efficient multi-sensor acquisition without external logic.
Availability
MAX11141ATI+ is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable medical devices, motor control feedback, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11141ATI+ 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, mixed-signal, and power-management ICs for demanding industrial, automotive, and medical applications.
The MAX11135–MAX11143 family was engineered for low-power, high-speed data acquisition in space- and energy-constrained systems - delivering SAR performance with integrated intelligence (FIFO, SampleSet, AutoShutdown) in miniature TQFN packages.
FAQ
What is the maximum sampling rate of the MAX11141ATI+?
The MAX11141ATI+ achieves a guaranteed 500ksps conversion rate in both internal and external clock modes. In internal clock mode, conversion time is 5.9µs; in external clock mode with 8MHz SCLK, it completes in 2000ns. This rate is maintained across the full -40°C to +125°C operating range and supports undersampling of signals up to 1.5MHz full-linear bandwidth.
Does the MAX11141ATI+ support differential input configurations?
Yes, the MAX11141ATI+ supports fully differential, pseudo-differential (relative to REF−/AIN15), and single-ended input modes across all four analog inputs. In fully differential mode, AIN0–AIN3 can be paired as two differential channels; in pseudo-differential mode, all inputs share REF−/AIN15 as common reference - confirmed in the "Analog Multiplexer" section and pin description table.
How does the SampleSet™ feature work on the MAX11141ATI+?
SampleSet™ is available only in external clock mode and allows users to program a custom 256-entry sequence of channel selections and conversion parameters into internal registers. Once loaded, the MAX11141ATI+ autonomously executes the sequence without host intervention - reducing MCU communication overhead and enabling mixed-rate sampling (e.g., 100Hz temp + 10kHz vibration) within one acquisition burst.
What is the purpose of the EOC pin on the MAX11141ATI+?
The EOC (End of Conversion) pin on the MAX11141ATI+ asserts low to signal valid conversion data - but only in internal clock mode. In external clock mode, EOC remains inactive; status must be inferred from timing or DOUT activity. This behavior is explicitly documented in the pin description and functional diagram sections of the datasheet.
Can the MAX11141ATI+ operate with a 1.8V I/O supply?
Yes, the MAX11141ATI+ supports OVVDD from 1.5V to 3.6V, enabling direct connection to 1.8V microcontrollers without level-shifting circuitry. Digital inputs (CS, SCLK, DIN) recognize 0.25×OVVDD as logic low and 0.75×OVVDD as logic high; DOUT drives to 0.15V low and 0.85×OVVDD high under 200µA load - verified in the "Digital Inputs/Outputs" electrical characteristics tables.
MAX11141ATI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2, 4
- 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:
- -
MAX11141ATI+ FAQ
1.How can I place an order for MAX11141ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11141ATI+ 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 MAX11141ATI+ reliable?
The price and inventory of MAX11141ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11141ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11141ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11141ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11141ATI+?
MAX11141ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11141ATI+ 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 MAX11141ATI+?
For technical support, including MAX11141ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11141ATI+ requirements.
6.How does Aetrix verify that MAX11141ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11141ATI+ 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 MAX11141ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11141ATI+?
All MAX11141ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11141ATI+, 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 MAX11141ATI+ part is unused and in its original packaging.
Return procedure for MAX11141ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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