My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX11143ATI+
- Part No.:
- MAX11143ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11143ATI+.pdf
- Description:
- IC ADC 8BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX11143ATI+ from Maxim Integrated is a 8-bit, 16-channel, 500ksps successive-approximation register (SAR) analog-to-digital converter with external differential reference support, 1.5MHz full-linear bandwidth, and integrated SampleSet channel sequencer. It operates from 2.35V–3.6V, consumes 4.2mW at 500ksps, and features 3-wire SPI/QSPI/MICROWIRE-compatible serial interface - ideal for battery-powered multichannel data acquisition in industrial sensors and portable instrumentation.
For engineers reviewing the MAX11143ATI+ datasheet, MAX11143ATI+ pinout, MAX11143ATI+ application, or MAX11143ATI+ equivalent, key selection criteria include its 16-channel analog multiplexer with true differential track/hold, user-programmable SampleSet sequencing (up to 256 entries), internal FIFO for burst sampling, ±0.02 LSB INL over temperature, and 28-pin 5mm × 5mm TQFN package with exposed pad.
Technical Context
The MAX11143ATI+ implements a SAR architecture with dual clock modes: internal clock (enabling FIFO buffering and on-chip averaging) and external clock (enabling SampleSet-based programmable channel sequencing). Its analog front-end supports single-ended, fully differential, and pseudo-differential input configurations across all 16 channels, with software-selectable bipolar ranges (±VREF+/2 or ±VREF+).
It integrates a 16-entry FIFO for high-speed acquisition decoupled from serial readout timing, and uses a true differential track-and-hold amplifier with 1.5MHz full-linear bandwidth - ensuring accurate digitization of fast transients without aliasing artifacts in undersampling applications up to 7.5MHz (-0.1dB point).
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 - enables real-time capture of signals up to 250kHz (Nyquist-limited), suitable for motor current sensing and vibration monitoring. |
| INL / DNL | ±0.02 LSB / ±0.02 LSB - ensures monotonicity and minimal code-width variation, critical for closed-loop control accuracy and calibration stability. |
| Full-Linear Bandwidth | 1.5MHz - preserves signal integrity for transient events and harmonic-rich waveforms without gain/phase distortion in the digitized band. |
| Power Dissipation | 4.2mW at 3V/500ksps - extends battery life in portable instruments; drops to 2.1µW in full shutdown mode. |
| Reference Input | External differential (REF+/REF−), 1V to VDD - allows precision ratiometric measurements using stable external references or system-supply-referenced sensing. |
| Serial Interface | 3-wire SPI/QSPI/MICROWIRE-compatible - connects directly to microcontrollers without level shifters or glue logic, supporting 1.5V–3.6V I/O voltage (OVDD). |
Pinout & Package
MAX11143ATI+ is housed in a 28-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed thermal pad (EP), rated for -40°C to +125°C operation. The package supports efficient heat dissipation and low-inductance grounding via direct EP-to-GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN13 | Analog Input Channels | 14 dedicated single-ended/differential inputs; configurable as 16-channel mux (with CNVST/AIN14 and REF-/AIN15 repurposable as AIN14/AIN15). |
| CNVST/AIN14 | Active-Low Conversion Start / Analog Input 14 | Hardware-triggered conversion start; when not used as trigger, functions as 15th analog input channel. |
| REF-/AIN15 | External Reference Negative / Analog Input 15 | Differential reference return; doubles as 16th analog input when reference is internally derived or unneeded. |
| REF+ | External Positive Reference Input | Accepts 1V to VDD reference voltage; bypassed with 0.47µF capacitor to GND for noise immunity. |
| VDD, DGND, GND, EP | Power and Ground Terminals | VDD (2.35–3.6V analog supply); DGND (digital I/O ground); GND (analog ground); EP must be soldered to PCB GND plane for thermal and noise performance. |
| OVDD | Digital I/O Supply | Independent 1.5–3.6V supply for serial interface - enables direct interfacing with 1.8V/2.5V/3.3V controllers without level translation. |
| CS, SCLK, DIN, DOUT, EOC | 3-Wire Serial Interface | Standard SPI-like protocol: CS enables interface; SCLK clocks data; DIN loads commands; DOUT outputs conversion results; EOC asserts low upon completion (internal clock mode only). |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet Channel Sequencer | User-programmable sequence of up to 256 conversions across any enabled channels - eliminates MCU polling overhead and enables autonomous multi-rate sampling (e.g., slow temp + fast current). |
| 16-Entry FIFO Buffer | Stores conversions at full 500ksps rate while host reads at lower speed - resolves timing mismatch between high-speed acquisition and slower processor bus. |
| Flexible Input Configuration | All 16 channels support single-ended, fully differential, or pseudo-differential modes with software-selectable bipolar ranges - simplifies mixed-signal front-end design without external op-amps. |
| AutoShutdown & Fast Wake-up | Reduces supply current to ≤6µA in full shutdown; wakes in <1µs - ideal for duty-cycled sensor nodes requiring rapid response to event triggers. |
| High-Accuracy DC Performance | ±0.02 LSB INL/DNL, ±0.7 LSB offset error, ±0.3 LSB gain error over -40°C to +125°C - enables factory calibration with minimal drift compensation. |
Applications
| Industrial Sensor Hub | Battery-Powered Data Logger |
|---|---|
Use Scenario: Simultaneous monitoring of 12 temperature, pressure, and current sensors in a PLC edge module. IC Role / Device Role / Timing Role: 16-channel SAR ADC performing hardware-sequenced conversions via SampleSet, delivering timestamp-coherent samples to an ARM Cortex-M4. Use Value: Eliminates need for external multiplexer and timing controller; reduces BOM count by 3 components and cuts firmware development time for channel management. | Use Scenario: Portable environmental monitor logging CO₂, humidity, and ambient light every 10 seconds using coin-cell battery. IC Role / Device Role / Timing Role: Low-power ADC entering AutoShutdown between readings, waking on timer interrupt to acquire 8-channel snapshot in <12µs. Use Value: Achieves >2-year battery life at 10s interval due to 2.1µW shutdown power and 4.2mW active power - 3× longer than comparable 12-bit parts. |
| Motor Control Feedback Unit | Medical Patient Monitor Front-End |
Use Scenario: Real-time sampling of phase currents and DC-link voltage in a 3-phase inverter for field-oriented control. IC Role / Device Role / Timing Role: 8-bit ADC capturing synchronized current/voltage pairs at 500ksps with 1.5MHz linear bandwidth to preserve PWM edge fidelity. Use Value: Enables accurate current reconstruction without external anti-aliasing filters; supports 20kHz PWM switching with <0.5% gain error over temperature. | Use Scenario: Multi-parameter vital sign acquisition (ECG lead I/II/III, SpO₂ photodiode, respiration impedance) in handheld diagnostic device. IC Role / Device Role / Timing Role: Configured for pseudo-differential inputs relative to common electrode; uses internal averaging to suppress 50/60Hz interference without notch filters. Use Value: Delivers 49.6dB SINAD at 250kHz input while operating from 3.0V supply - meets IEC 60601-2-27 ECG accuracy requirements with minimal external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit resolution, 16-channel, SPI interface, 1MSPS max rate; requires external reference; no SampleSet or FIFO. | Higher resolution but higher power (12mW @ 1MSPS); lacks autonomous sequencing - demands continuous MCU supervision. | Select for precision measurement where 12-bit linearity outweighs autonomy and power savings. |
| AD7476AWYRMZ-REEL7 | Single-channel, 12-bit, 1MSPS, no internal FIFO or sequencer; 6-lead SOT-23 package. | Not multichannel; requires external multiplexer and timing logic; unsuitable for simultaneous multi-sensor acquisition. | Select only for space-constrained single-signal applications where channel count is irrelevant. |
Compared with ADS7953IRHBT and AD7476AWYRMZ-REEL7, MAX11143ATI+ uniquely combines 16-channel integration, SampleSet programmability, and sub-5mW power - making it the only choice for autonomous, low-power, multichannel edge sensing without MCU intervention.
Availability
MAX11143ATI+ is available at Aetrix Electronics and suitable for industrial sensor hubs, battery-powered data loggers, and motor control feedback units requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +125°C operation.
Supply support for MAX11143ATI+ 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, medical, and automotive applications.
The MAX11135–MAX11143 family was engineered for ultra-low-power, high-channel-count data acquisition in space- and energy-constrained systems - emphasizing autonomous operation, flexible input routing, and seamless microcontroller integration via standard serial protocols.
FAQ
What is the maximum sampling rate supported by MAX11143ATI+?
The MAX11143ATI+ supports a maximum sampling rate of 500ksps in both internal and external clock modes. At this rate, conversion time is 2000ns in externally clocked mode (fSCLK = 8MHz) and 5.9µs in internally clocked mode. This rate is fixed per device variant and cannot be increased beyond datasheet-specified limits without violating timing or accuracy guarantees.
Does MAX11143ATI+ support differential input configurations?
Yes, MAX11143ATI+ supports fully differential, pseudo-differential, and single-ended analog input configurations across all 16 channels. In fully differential mode, it accepts true differential pairs (e.g., AIN0+/AIN0−) with operational input voltage difference ranging from -VREF+ to +VREF+, and each input referenced to GND from -0.1V to VREF+ + 0.1V.
How does the SampleSet feature work in MAX11143ATI+?
The SampleSet feature in MAX11143ATI+ is a user-programmable channel sequencer that stores up to 256 conversion commands in nonvolatile memory. Once loaded, it autonomously cycles through defined channels at programmable intervals - enabling mixed-rate sampling (e.g., 100Hz temp + 10kHz current) without CPU involvement or serial interface traffic during acquisition.
What is the purpose of the OVDD pin on MAX11143ATI+?
The OVDD pin on MAX11143ATI+ supplies power to the digital I/O circuitry (CS, SCLK, DIN, DOUT, EOC) independently from the analog VDD rail. It accepts 1.5V–3.6V, allowing direct interface with 1.8V, 2.5V, or 3.3V microcontrollers without level-shifting components - reducing board complexity and signal integrity risks.
Can MAX11143ATI+ operate with an internal reference?
No, MAX11143ATI+ requires an external differential reference applied to REF+ and REF− pins. It does not include an internal reference voltage source. The reference voltage must be between 1V and VDD, and REF+ must be bypassed to GND with a 0.47µF capacitor to ensure stable, low-noise operation as specified in the datasheet.
MAX11143ATI+ 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:
- 8
- Sampling Rate (Per Second):
- 500k
- 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:
- -
MAX11143ATI+ FAQ
1.How can I place an order for MAX11143ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11143ATI+ 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 MAX11143ATI+ reliable?
The price and inventory of MAX11143ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11143ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11143ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11143ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11143ATI+?
MAX11143ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11143ATI+ 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 MAX11143ATI+?
For technical support, including MAX11143ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11143ATI+ requirements.
6.How does Aetrix verify that MAX11143ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11143ATI+ 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 MAX11143ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11143ATI+?
All MAX11143ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11143ATI+, 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 MAX11143ATI+ part is unused and in its original packaging.
Return procedure for MAX11143ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX11143ATI+ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
