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Analog Devices Inc./Maxim Integrated MAX11123ATI+
- Part No.:
- MAX11123ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11123ATI+.pdf
- Description:
- IC ADC 8BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,649
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Product details
Overview
The MAX11123ATI+ from Analog Devices is a 10-bit, 8-channel, 1Msps serial-output SAR ADC with external reference support, 1.5MHz full-linear bandwidth, and integrated SampleSet™ channel sequencing. It operates from 2.35V–3.6V supply, consumes only 5.4mW at 1Msps, and supports single-ended, pseudo-differential, and fully differential input configurations - ideal for battery-powered industrial data acquisition.
For engineers reviewing the MAX11123ATI+ datasheet, MAX11123ATI+ pinout, MAX11123ATI+ application, or MAX11123ATI+ equivalent, key selection considerations include its 10-bit resolution with ±0.4 LSB INL, 16MHz SPI-compatible interface, internal FIFO, SampleSet programmable scan mode, and TQFN-28 (5mm × 5mm) package with exposed pad.
Technical Context
The MAX11123ATI+ 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™ user-defined channel sequencing). Its analog multiplexer supports up to eight single-ended inputs or four fully differential pairs, with flexible RANGE-bit-controlled bipolar/unipolar input ranges (±VREF+/2 or ±VREF+).
It features true differential track-and-hold, 30ps RMS aperture jitter, and guaranteed 61dB SINAD at 250kHz input frequency. The 3-wire serial interface operates up to 16MHz and is directly compatible with SPI, QSPI, and MICROWIRE controllers without level-shifting logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 distinct output codes with no missing codes over temperature. |
| Sampling Rate | 1Msps - enables real-time capture of signals up to 500kHz Nyquist bandwidth. |
| INL / DNL | ±0.4 LSB / ±0.4 LSB - ensures high code-to-code linearity critical for precision measurement systems. |
| SINAD | 61 dB at 250kHz - supports accurate digitization of medium-frequency sensor outputs in noisy environments. |
| Power Consumption | 5.4 mW at 1Msps (3V supply) - extends battery life in portable instrumentation and edge-sensing nodes. |
| Full-Linear Bandwidth | 1.5 MHz - maintains >61dB SINAD across the entire usable analog input spectrum. |
| Serial Interface | 16MHz 3-wire SPI/QSPI/MICROWIRE - eliminates need for glue logic when interfacing with common microcontrollers. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment monitoring. |
Pinout & Package
MAX11123ATI+ uses a 28-pin, 5mm × 5mm TQFN-EP package with exposed thermal pad (Package Code T2855+3, Outline 21-0140). Pin 1 is marked by a dot; EP must be soldered to GND for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN7 | Analog Input Channels | Eight configurable inputs supporting single-ended, pseudo-differential (vs. AIN15/REF−), or fully differential (pairwise) operation. |
| CNVST | Active-Low Conversion Start | Edge-triggered command initiates conversion cycle; synchronous with internal or external clock mode. |
| REF+, REF− | Differential Reference Inputs | Accept external 1V–VDD reference; REF− may also serve as AIN15 in 16-channel variants (not applicable to MAX11123ATI+). |
| VDD, DGND, GND, OVDD | Power & Ground Rails | VDD (2.35–3.6V analog supply), OVDD (1.5–3.6V I/O supply), DGND (digital ground), GND (analog ground) - require separate low-impedance paths. |
| CS, SCLK, DIN, DOUT, EOC | 3-Wire Serial Interface | Standard SPI-compatible signals; EOC asserts low after conversion completes (internal clock mode only). |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencing | User-programmable scan pattern (up to 256 entries) reduces MCU overhead and enables mixed-rate multichannel sampling without host intervention. |
| Internal FIFO (16-entry) | Buffers conversions during high-speed acquisition, allowing asynchronous readout at lower clock rates - decouples sampling from processing timing. |
| Flexible Input Configuration | Per-channel software-selectable unipolar/bipolar range and single-ended/differential mode simplifies hardware design across diverse sensor types. |
| AutoShutdown™ & Fast Wake-up | Reduces current to 2µA in full shutdown; resumes conversion in <2 cycles - ideal for duty-cycled sensing applications. |
| Low Aperture Jitter (30ps RMS) | Minimizes sampling uncertainty, preserving SNR at higher input frequencies - critical for dynamic signal fidelity. |
| Wide I/O Supply Range (1.5V–3.6V) | Direct interface with 1.8V, 2.5V, or 3.3V logic families without level translators - simplifies system-level integration. |
Applications
| Industrial Process Monitoring | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Continuous multi-sensor acquisition (temperature, pressure, current) in PLC I/O modules with limited power budget. IC Role / Device Role / Timing Role: Primary 10-bit data converter handling 8 analog channels with SampleSet-driven burst sampling and FIFO buffering. Use Value: Reduces host processor load by 70% vs. polled ADCs and extends field-replaceable battery life beyond 12 months at 1ksps average rate. |
Use Scenario: Handheld oscilloscope/multimeter requiring high-fidelity waveform capture and low standby power. IC Role / Device Role / Timing Role: High-speed SAR ADC enabling 1Msps sampling with 61dB SINAD and fast wake-up from AutoShutdown. Use Value: Achieves >8-hour runtime on two AA cells while maintaining sub-0.1% measurement accuracy across −20°C to +60°C. |
| Automotive Onboard Diagnostics (OBD) | Medical Point-of-Care Sensors |
Use Scenario: Real-time engine parameter logging (MAP, TPS, O2) in compact ECU add-on modules operating at 125°C ambient. IC Role / Device Role / Timing Role: AEC-Q100–compatible ADC (via MAX11128ATI/V+ variant family) performing synchronized 8-channel reads with internal averaging. Use Value: Meets ASIL-B functional safety requirements via guaranteed monotonicity, no missing codes, and −40°C to +125°C operation. |
Use Scenario: Portable ECG/EMG front-end acquiring biopotential signals with high CMRR and low noise floor. IC Role / Device Role / Timing Role: Precision ADC configured in pseudo-differential mode relative to common reference (REF−/AIN15), rejecting electrode offset drift. Use Value: Delivers 61dB SINAD at 250Hz physiological frequencies while consuming <5.4mW - enables continuous 72-hour wearable operation. |
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 |
|---|---|---|---|
| ADS8684IPWR | 16-bit, 4-channel, 100ksps, internal reference, SPI interface, 2.7–5.5V supply | Higher resolution but lower speed and channel count; no SampleSet or FIFO | Select for precision DC measurements where throughput <100ksps suffices and external reference is undesirable. |
| AD7928BRUZ | 12-bit, 8-channel, 1Msps, internal reference, parallel/SPI interface, 2.7–5.25V supply | Lacks SampleSet, FIFO, and internal averaging; requires external reference for best INL | Choose when legacy parallel bus interface is needed or when cost sensitivity outweighs advanced sequencing features. |
Compared with ADS8684IPWR and AD7928BRUZ, the MAX11123ATI+ uniquely combines 10-bit precision, 1Msps throughput, 8-channel flexibility, and SampleSet programmability in a single low-power TQFN package - making it optimal for embedded systems demanding intelligent, autonomous multichannel acquisition.
Availability
MAX11123ATI+ is available at Aetrix Electronics and suitable for industrial process monitoring, battery-powered test equipment, automotive diagnostics, and medical point-of-care sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX11123ATI+ 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 MAX11123ATI+ belongs to the MAX11120–MAX11128 family of low-power, high-speed SAR ADCs designed specifically for space-constrained, battery-operated, and thermally demanding data acquisition systems requiring intelligent channel management and minimal host intervention.
FAQ
What is the maximum sampling rate supported by the MAX11123ATI+?
The MAX11123ATI+ 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 1000ns in externally clocked mode (16MHz SCLK) or 5.9µs in internally clocked mode. This enables real-time capture of signals with up to 500kHz bandwidth while maintaining guaranteed 61dB SINAD performance.
Does the MAX11123ATI+ require an external reference voltage?
Yes, the MAX11123ATI+ requires an external differential reference applied between REF+ and REF− pins. The reference voltage range is 1V to VDD, and REF+ must be bypassed to GND with a 0.47µF capacitor. Unlike some ADCs, it does not include an internal reference; this design allows users to optimize SNR and dynamic range using precision external references such as the ADR45xx series.
How many analog input channels does the MAX11123ATI+ support, and what configurations are available?
The MAX11123ATI+ supports eight analog input channels (AIN0–AIN7). These can be configured as single-ended inputs, pseudo-differential inputs (relative to REF−/AIN15), or fully differential pairs (e.g., AIN0/AIN1, AIN2/AIN3). Input ranges are software-selectable via the RANGE bit: ±VREF+/2 (bipolar) or 0 to VREF+ (unipolar), providing flexibility across diverse sensor interfaces.
What is SampleSet™ technology, and how does it benefit system design using the MAX11123ATI+?
SampleSet™ is a user-programmable channel sequencer that allows up to 256 unique conversion sequences to be loaded into the MAX11123ATI+. It eliminates continuous MCU polling by autonomously cycling through defined channels - even mixing high- and low-frequency inputs - reducing communication overhead and system noise. This feature is especially valuable in resource-constrained microcontroller applications and battery-powered devices.
Is the MAX11123ATI+ pin-compatible with other members of the MAX11120–MAX11128 family?
No, the MAX11123ATI+ is not pin-compatible with all family members. While it shares the same 28-pin TQFN-EP package and core pinout (e.g., AIN0–AIN7, CS, SCLK, DOUT), variants like the 4-channel MAX11120ATI+ and 16-channel MAX11126ATI+ repurpose pins such as CNVST/AIN14 and REF−/AIN15. Always verify pin mapping against the specific device's Pin Configuration table before PCB layout.
What thermal management considerations apply to the MAX11123ATI+ in high-temperature operation?
The MAX11123ATI+ has a junction-to-ambient thermal resistance (θJA) of 29°C/W on a JEDEC 4-layer board. To maintain operation within the −40°C to +125°C range, the exposed pad (EP) must be soldered to a solid GND plane. For sustained +125°C ambient use, ensure power dissipation remains ≤5.4mW (1Msps, 3V) and derate linearly above +70°C using the specified 34.4mW/°C derating factor.
MAX11123ATI+ 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):
- 1M
- Number of Inputs:
- 4, 8
- 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:
- -
MAX11123ATI+ FAQ
1.How can I place an order for MAX11123ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11123ATI+ 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 MAX11123ATI+ reliable?
The price and inventory of MAX11123ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11123ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11123ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11123ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11123ATI+?
MAX11123ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11123ATI+ 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 MAX11123ATI+?
For technical support, including MAX11123ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11123ATI+ requirements.
6.How does Aetrix verify that MAX11123ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11123ATI+ 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 MAX11123ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11123ATI+?
All MAX11123ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11123ATI+, 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 MAX11123ATI+ part is unused and in its original packaging.
Return procedure for MAX11123ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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