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Analog Devices Inc./Maxim Integrated MAX11125ATI+
- Part No.:
- MAX11125ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11125ATI+.pdf
- Description:
- IC ADC 12BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:208
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Product details
Overview
MAX11125ATI+ from Analog Devices is a 10-bit, 8-channel, 1Msps SAR ADC with external reference support, 1.5MHz full-linear bandwidth, and 70dB SINAD at 250kHz - designed for high-speed data acquisition in industrial control and battery-powered instrumentation.
For engineers reviewing the MAX11125ATI+ datasheet, MAX11125ATI+ pinout, MAX11125ATI+ application, or MAX11125ATI+ equivalent, key selection criteria include its 10-bit resolution with ±0.4 LSB INL, SampleSet™ programmable channel sequencing, internal FIFO, and 5.4mW power consumption at 1Msps with 3V supply.
Technical Context
The MAX11125ATI+ operates in two clock modes: internal (with integrated 16-entry FIFO and averaging) and external (enabling SampleSet™ user-defined channel sequencing up to 256 steps). It supports flexible analog input configurations - single-ended, fully differential, or pseudo-differential - across all 8 channels using a true differential track/hold architecture.
Its 3-wire SPI-compatible serial interface runs up to 16MHz and directly interfaces with 1.8V/2.5V/3.3V digital systems via independent OVDD (1.5V–3.6V), while analog supply VDD ranges from 2.35V to 3.6V. The device guarantees ±0.4 LSB INL and ±0.4 LSB DNL over –40°C to +125°C with no missing codes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 distinct output codes with monotonic transfer function and no missing codes. |
| Sampling Rate | 1Msps - enables real-time capture of signals up to 500kHz Nyquist frequency without pipeline delay. |
| Full-Linear Bandwidth | 1.5MHz - maintains SINAD > 70dB across full input frequency range for accurate wideband signal digitization. |
| INL / DNL | ±0.4 LSB / ±0.4 LSB - ensures high code-to-code linearity critical for closed-loop control and precision measurement. |
| Power Dissipation | 5.4mW at 1Msps (3V) - enables extended battery life in portable instruments without thermal derating. |
| Reference Input | External differential (REF+/REF−) - supports 1V to VDD range, enabling flexible gain scaling and ratiometric sensing. |
| Serial Interface | 16MHz 3-wire SPI/QSPI/MICROWIRE - eliminates level-shifting logic when interfacing with common microcontrollers. |
Pinout & Package
The MAX11125ATI+ is housed in a 28-pin, 5mm × 5mm TQFN-EP package with exposed pad (Package Code T2855+3), optimized for thermal performance (θJA = 29°C/W) and PCB space efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN7 | Analog Input Channels | Eight configurable inputs supporting single-ended, pseudo-differential, or fully differential acquisition relative to REF− or common input. |
| CNVST/AIN14 | Conversion Start Input | Active-low trigger initiating conversion; also serves as analog input AIN14 in 16-channel variants (not used in MAX11125ATI+). |
| REF+/REF− | Differential Reference Inputs | Accept external reference voltage (1V to VDD); REF− may be tied to GND or used as AIN15 in 16-channel variants (not used here). |
| SCLK, DIN, DOUT, CS | 3-Wire Serial Interface | Standard SPI timing with DOUT valid on SCLK falling edge; CS enables three-state output and interface synchronization. |
| EOC | End-of-Conversion Flag | Pulls low after conversion completes in internal clock mode; not active in external clock mode. |
| VDD, OVDD, DGND, GND | Power & Ground Rails | VDD (2.35–3.6V) powers analog core; OVDD (1.5–3.6V) powers digital I/O; separate DGND/GND reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Channel Sequencing | User-programmable sequence of up to 256 conversions across 8 channels - reduces MCU overhead and enables mixed-rate sampling without host intervention. |
| 16-Entry Internal FIFO | Buffers consecutive conversions at 1Msps, allowing readout at slower clock rates - decouples sampling from processing and simplifies timing-critical firmware. |
| Flexible Input Configuration | All 8 channels support single-ended, pseudo-differential (vs. common input), or fully differential modes - accommodates diverse sensor topologies without external multiplexers. |
| Bipolar Input Ranges | Software-selectable ±VREF+/2 or ±VREF+ - enables direct digitization of AC-coupled or bipolar industrial signals without external op-amp level shifting. |
| AutoShutdown™ Mode | Reduces supply current to 2µA during idle periods - extends battery life in intermittent-sampling applications like condition monitoring. |
Applications
| Industrial Process Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Real-time acquisition of temperature, pressure, and flow sensor outputs in PLC I/O modules with tight loop timing. IC Role / Device Role / Timing Role: 10-bit SAR ADC performing synchronized 1Msps sampling across 8 analog inputs using SampleSet™ sequencing. Use Value: Eliminates need for external sequencer or FPGA glue logic; ±0.4 LSB INL ensures <0.04% measurement error in 4–20mA loop calibration. | Use Scenario: Battery-powered ECG or pulse oximeter front-end acquiring multi-lead biopotential signals with low noise and minimal power draw. IC Role / Device Role / Timing Role: Low-power 10-bit ADC digitizing differential electrode pairs with internal averaging to boost SNR in noisy environments. Use Value: 5.4mW at 1Msps and 2µA shutdown current enable >72-hour operation on a single CR2032 cell. |
| Automotive Diagnostic Tools | High-Speed Closed-Loop Control |
Use Scenario: Handheld OBD-II scanner capturing engine sensor waveforms (MAP, TPS, knock) for real-time diagnostics and waveform playback. IC Role / Device Role / Timing Role: 1Msps ADC with 1.5MHz linear bandwidth capturing transient events like fuel injector pulses or misfire signatures. Use Value: 70dB SINAD at 250kHz ensures clean digitization of fast-rising edges without harmonic distortion masking fault patterns. | Use Scenario: Servo motor position feedback loop requiring sub-microsecond latency and deterministic sampling for PID execution at 50kHz update rate. IC Role / Device Role / Timing Role: Deterministic 10-bit ADC with no pipeline delay and 1000ns conversion time in external clock mode. Use Value: Enables jitter-free sampling aligned to PWM cycles; internal FIFO allows burst capture during interrupt latency windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit, 500ksps, internal reference only; no SampleSet™ or FIFO; SPI interface with busy flag instead of EOC. | Higher resolution but lower speed; suited for precision DC measurements, not high-speed transient capture. | Select MAX11125ATI+ when 1Msps, programmable sequencing, and low power are prioritized over raw resolution. |
| AD7476ARTZ-REEL7 | 12-bit, single-channel, 1Msps, no FIFO, no channel sequencing, no differential reference support. | Requires external multiplexer and reference circuitry for multichannel use; lacks SampleSet™ flexibility. | Choose MAX11125ATI+ for integrated 8-channel operation with minimal external components and reduced firmware complexity. |
Compared with ADS8684IPWR and AD7476ARTZ-REEL7, the MAX11125ATI+ uniquely combines 10-bit accuracy, 8-channel integration, SampleSet™ sequencing, and 5.4mW power at 1Msps - making it optimal for compact, multichannel, battery-aware systems where speed and configurability outweigh pure resolution demands.
Availability
MAX11125ATI+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical sensors, automotive diagnostic tools, and high-speed closed-loop control systems requiring stable component supply across extended temperature ranges.
Supply support for MAX11125ATI+ 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 MAX11120–MAX11128 family was engineered for low-power, high-speed multichannel data acquisition in space-constrained, battery-operated, and harsh-environment applications - emphasizing integration, configurability, and guaranteed performance from –40°C to +125°C.
FAQ
What is the maximum sampling rate supported by the MAX11125ATI+?
The MAX11125ATI+ supports a maximum sampling rate of 1Msps in both internal and external clock modes. In external clock mode with fSCLK = 16MHz, conversion time is 1000ns per sample; in internal clock mode, it is 5.9µs. This enables full-bandwidth digitization of signals up to 500kHz without aliasing.
Does the MAX11125ATI+ support differential input configurations?
Yes, the MAX11125ATI+ supports fully differential input pairs across its 8 analog channels. Each pair uses true differential track-and-hold, with operational input voltage difference ranging from –VREF+/2 to +VREF+/2 or –VREF+ to +VREF+, depending on RANGE bit setting - ideal for noise-rejecting sensor interfaces.
How does the SampleSet™ feature work in the MAX11125ATI+?
The SampleSet™ feature in the MAX11125ATI+ allows users to define and load a custom channel sequence of up to 256 steps into internal memory. Once loaded, the ADC autonomously cycles through the programmed order without MCU intervention - reducing communication overhead and enabling mixed-rate sampling in multichannel systems.
What power supply requirements does the MAX11125ATI+ have?
The MAX11125ATI+ requires two supplies: VDD (2.35V–3.6V) for the analog core and OVDD (1.5V–3.6V) for digital I/O. This dual-supply architecture allows direct interfacing with 1.8V, 2.5V, or 3.3V controllers. At 3V VDD and 1Msps, it consumes 5.4mW; in full shutdown, current drops to 2µA.
Is the MAX11125ATI+ pin-compatible with other devices in the MAX11120–MAX11128 family?
Yes, the MAX11125ATI+ shares the same 28-pin TQFN package and pinout as MAX11122ATI+ (4-channel) and MAX11128ATI+ (16-channel), enabling layout reuse across resolution/channel-count variants. All share identical power, reference, and serial interface pin assignments - simplifying hardware design scalability.
MAX11125ATI+ 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:
- 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:
- -
MAX11125ATI+ FAQ
1.How can I place an order for MAX11125ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11125ATI+ 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 MAX11125ATI+ reliable?
The price and inventory of MAX11125ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11125ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11125ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11125ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11125ATI+?
MAX11125ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11125ATI+ 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 MAX11125ATI+?
For technical support, including MAX11125ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11125ATI+ requirements.
6.How does Aetrix verify that MAX11125ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11125ATI+ 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 MAX11125ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11125ATI+?
All MAX11125ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11125ATI+, 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 MAX11125ATI+ part is unused and in its original packaging.
Return procedure for MAX11125ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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