My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX11135ATI+
- Part No.:
- MAX11135ATI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX11135ATI+.pdf
- Description:
- IC ADC 12BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,109
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX11135ATI+ from Maxim Integrated is a 12-bit, 4-channel, 500ksps successive-approximation register (SAR) ADC with external reference support, 1.5MHz full-linear bandwidth, ±1 LSB INL/DNL, and 70dB SINAD at 250kHz input - deployed in high-speed closed-loop control and portable medical instrumentation.
For engineers reviewing the MAX11135ATI+ datasheet, MAX11135ATI+ pinout, MAX11135ATI+ application, or MAX11135ATI+ equivalent, this page delivers verified electrical specs, TQFN-28 package mapping, internal/external clock mode behavior, SampleSet sequencer capability, and real-world design implications for battery-powered data acquisition systems.
Technical Context
The MAX11135ATI+ implements a SAR architecture with dual clock modes: internally clocked (with integrated 16-entry FIFO and programmable averaging) and externally clocked (enabling SampleSet-based channel sequencing up to 256 entries). It supports single-ended, pseudo-differential, and fully differential analog inputs across all four channels.
Its analog front-end features true differential track-and-hold, bipolar/unipolar input range selection via RANGE bit, and 30ps RMS aperture jitter. The 3-wire SPI/QSPI/MICROWIRE-compatible serial interface operates up to 8MHz with no pipeline delay and full shutdown current of 2µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 500ksps - enables real-time capture of signals up to 250kHz while maintaining ≥70dB SINAD per specification. |
| INL / DNL | ±1 LSB - ensures accurate amplitude fidelity and linearity critical for closed-loop feedback and sensor calibration. |
| Full-Linear Bandwidth | 1.5MHz - supports undersampling of RF or transient signals without harmonic distortion degradation. |
| Power Dissipation | 4.2mW at 3V/500ksps - enables >10-hour operation on a 200mAh Li-ion cell in continuous acquisition mode. |
| Supply Range | VDD = 2.35V–3.6V, OVDD = 1.5V–3.6V - allows direct interfacing with 1.8V/2.5V/3.3V logic without level shifters. |
| Shutdown Current | 2µA - reduces standby power by >99.9% versus active mode, essential for wake-on-event architectures. |
Pinout & Package
MAX11135ATI+ is housed in a 28-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed pad (EP), rated for -40°C to +125°C operation. Pin functions are validated per Maxim's official pin configuration diagram for the 4-channel variant (MAX11135).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN3 | Analog Input Channels | Four configurable inputs supporting single-ended, pseudo-differential (vs. REF−/AIN15), or fully differential pairs. |
| CNVST | Active-Low Conversion Start | Edge-triggered command initiating conversion sequence; compatible with microcontroller GPIO or timer outputs. |
| REF+, REF− | Differential Reference Inputs | Accept external 1V–VDD reference; REF− may double as AIN15 in 16-channel variants but is dedicated REF− in MAX11135ATI+. |
| SCLK, DIN, DOUT, CS | 3-Wire Serial Interface | Full-duplex SPI-compatible interface; DOUT valid on SCLK falling edge; CS enables three-state output control. |
| EOC | End-of-Conversion Flag | Active-low pulse signaling data readiness only in internal clock mode; not used in external clock mode. |
| VDD, OVDD, DGND, GND | Power & Ground Rails | VDD powers analog core (2.35–3.6V); OVDD powers digital I/O (1.5–3.6V); separate DGND/GND reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet Channel Sequencer | User-programmable 256-step analog input sequence reduces MCU polling overhead and enables mixed-rate sampling (e.g., fast temp + slow pressure). |
| Internal FIFO (16-entry) | Buffers conversions during high-speed acquisition, allowing asynchronous readout at lower SCLK rates - decouples sampling from host timing constraints. |
| Configurable Input Topology | All four channels support unipolar/bipolar ranges and single-ended/pseudo-differential/fully differential configurations - eliminates need for external signal conditioning circuitry. |
| AutoShutdown with Fast Wake-up | Enters 2µA shutdown automatically after conversion; wakes in <1µs - ideal for event-driven sensing in IoT edge nodes. |
| 1.5MHz Full-Linear Bandwidth | Preserves signal integrity for transients and harmonics beyond Nyquist, enabling accurate undersampling of 1–2MHz sensor outputs. |
Applications
| Industrial Process Monitoring | Portable ECG Front-End |
|---|---|
|
Use Scenario: Real-time monitoring of 4-channel thermocouple and pressure sensor array in compact PLC module. IC Role / Device Role / Timing Role: Simultaneous 12-bit digitization of isolated analog inputs with synchronized CNVST triggering and FIFO buffering for burst-mode logging. Use Value: Eliminates external multiplexer and sample-hold ICs; 4.2mW power enables fanless enclosure design with 5-year battery life in maintenance-free deployments. |
Use Scenario: Low-noise, battery-operated 4-lead ECG acquisition with lead-off detection and motion artifact rejection. IC Role / Device Role / Timing Role: Pseudo-differential input configuration referenced to Wilson central terminal; internal averaging improves SNR for sub-mV cardiac signals. Use Value: ±1 LSB INL ensures accurate ST-segment measurement; 1.5MHz bandwidth captures QRS complex fidelity without aliasing from muscle noise. |
| Automotive Cabin Air Quality Sensor Hub | Smart Grid Fault Detection Node |
|
Use Scenario: Multi-gas sensor interface (CO, NO₂, VOC) with temperature-compensated analog outputs in automotive HVAC control unit. IC Role / Device Role / Timing Role: Single-shot or scan-mode conversion triggered by microcontroller; SampleSet sequences sensors at optimal intervals (e.g., 100ms CO, 500ms VOC). Use Value: Reduces host CPU load by >70% vs. polled SPI reads; 2.35V minimum VDD supports operation during cold-crank battery dips. |
Use Scenario: Distributed fault-current monitor on medium-voltage distribution lines using Rogowski coil outputs. IC Role / Device Role / Timing Role: High-speed acquisition of transient overcurrent events (>100kHz spectral content) with precise timestamping via EOC pulse. Use Value: 30ps aperture jitter enables sub-degree phase accuracy for directional overcurrent protection; 70dB SINAD validates harmonic analysis up to 5th order. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 16-channel, 1MSPS, SPI interface; requires external reference; no internal FIFO or SampleSet sequencer. | Better channel count and speed, but lacks autonomous sequencing and FIFO - increases host firmware complexity. | Select when higher channel density and throughput outweigh autonomous operation needs. |
| AD7476ARTZ-REEL7 | 12-bit, single-channel, 1MSPS, no FIFO, no sequencer, 3.6V max VDD, 3.5mW typical power. | Lower integration - requires external MUX and timing control for multi-channel use; simpler for point-measurement designs. | Select for cost-sensitive, single-sensor applications where system-level sequencing is handled externally. |
Compared with ADS7953IRHBT and AD7476ARTZ-REEL7, the MAX11135ATI+ uniquely combines 4-channel flexibility, on-chip FIFO, and SampleSet sequencing - reducing host processing burden and PCB area in space-constrained, multi-sensor embedded systems.
Availability
MAX11135ATI+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, automotive cabin air quality sensing, and smart grid fault detection requiring stable component supply and guaranteed long-term manufacturability.
Supply support for MAX11135ATI+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX11135–MAX11143 family was designed for ultra-low-power, high-accuracy multichannel data acquisition in battery-operated and thermally constrained environments - emphasizing integration, autonomous operation, and wide supply voltage tolerance.
FAQ
What is the maximum sampling rate supported by MAX11135ATI+?
The MAX11135ATI+ supports a maximum sampling rate of 500ksps in both internal and external clock modes. At this rate, it achieves 70dB SINAD at 250kHz input frequency and consumes 4.2mW with a 3V supply. Conversion time is 5.9µs in internal clock mode and 2000ns in external clock mode with 8MHz SCLK.
Does MAX11135ATI+ support differential input configurations?
Yes, MAX11135ATI+ supports fully differential, pseudo-differential, and single-ended analog input configurations across all four channels. In pseudo-differential mode, inputs are referenced to REF− (pin 13), and in fully differential mode, AIN0–AIN3 can be paired as AIN0/AIN1 and AIN2/AIN3 with programmable polarity and range selection.
How does the SampleSet feature work in MAX11135ATI+?
The SampleSet feature in MAX11135ATI+ is a user-programmable channel sequencer that accepts up to 256 entries defining acquisition order, repetition, and channel enable/disable states. It operates autonomously in external clock mode, freeing the host MCU from managing individual conversions and reducing system-level noise and power consumption.
What is the purpose of the EOC pin on MAX11135ATI+?
The EOC (End of Conversion) pin on MAX11135ATI+ is an active-low output that pulses low to indicate valid conversion data in internal clock mode only. In external clock mode, data validity is determined by SCLK timing and DOUT edge alignment - EOC remains inactive and should be left unconnected or ignored.
Can MAX11135ATI+ operate with a 1.8V I/O supply?
Yes, MAX11135ATI+ supports OVDD from 1.5V to 3.6V, making it fully compatible with 1.8V digital systems. Its digital inputs accept VIH ≥ 0.75×OVDD and VIL ≤ 0.25×OVDD, and DOUT drives VOH ≥ 0.85×OVDD and VOL ≤ 0.15×OVDD - eliminating need for level-shifting circuitry when interfacing with 1.8V FPGAs or microcontrollers.
MAX11135ATI+ 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):
- 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:
- -
MAX11135ATI+ FAQ
1.How can I place an order for MAX11135ATI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11135ATI+ 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 MAX11135ATI+ reliable?
The price and inventory of MAX11135ATI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11135ATI+ is usually 5 days.
3.What payment methods are accepted for MAX11135ATI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11135ATI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11135ATI+?
MAX11135ATI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11135ATI+ 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 MAX11135ATI+?
For technical support, including MAX11135ATI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11135ATI+ requirements.
6.How does Aetrix verify that MAX11135ATI+ is sourced from the original manufacturer or authorized distributors?
All MAX11135ATI+ 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 MAX11135ATI+ meets industry standards.
7.What is the process for return or replacement of MAX11135ATI+?
All MAX11135ATI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11135ATI+, 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 MAX11135ATI+ part is unused and in its original packaging.
Return procedure for MAX11135ATI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX11135ATI+ 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…
