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Analog Devices Inc./Maxim Integrated MAX11328ATJ+T
- Part No.:
- MAX11328ATJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX11328ATJ+T.pdf
- Description:
- IC ADC 12BIT SAR 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,390
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Product details
Overview
MAX11328ATJ+T from Maxim Integrated is a 12-bit, 16-channel SAR analog-to-digital converter with post-mux external signal conditioning access, 1Msps conversion rate, ±1 LSB INL/DNL, 70dB SINAD at 100kHz, and operation from 2.35V–3.6V supply. It supports single-ended, fully differential, and pseudo-differential inputs and is used in high-speed industrial control and portable medical instrumentation.
For engineers reviewing the MAX11328ATJ+T datasheet, MAX11328ATJ+T pinout, MAX11328ATJ+T application, or MAX11328ATJ+T equivalent, this page delivers verified specifications, real-world interface behavior, validated alternative options, and design-critical timing and signal conditioning guidance for multichannel data acquisition systems.
Technical Context
The MAX11328ATJ+T implements a successive approximation register (SAR) architecture with integrated 16-channel analog multiplexer and external-accessible mux output (AOP/AON) and ADC input (AIP/AIN), enabling external PGA/filter placement between stages. It supports both internal clock mode (with 16-entry FIFO and programmable averaging) and external clock mode (with SampleSet™ channel sequencing up to 256 entries).
Its analog front-end allows per-channel configuration of input type (single-ended/differential/pseudo-differential) and bipolar range selection (±VREF+/2 or ±VREF+), while the 48MHz 3-wire SPI/QSPI/MICROWIRE-compatible serial interface operates with CPOL=CPHA=1 and delivers 16-bit frames containing channel ID and 12-bit result when CHAN_ID=1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-precision measurement of sensor or transducer outputs. |
| Conversion Rate | 1Msps - supports real-time sampling of fast transient signals without pipeline delay, critical for closed-loop control. |
| SINAD | 70dB at 100kHz - ensures accurate digitization of medium-bandwidth signals such as motor current or ECG waveforms. |
| INL / DNL | ±1 LSB - guarantees monotonicity and no missing codes, essential for calibration-sensitive instrumentation. |
| Supply Voltage | 2.35V to 3.6V - enables direct integration into modern low-voltage battery-powered systems without level-shifting. |
| Power Dissipation | 5.4mW at 1Msps (3V) - extends runtime in portable instruments while maintaining full-speed performance. |
| Input Configuration | 16 single-ended / 12 fully differential / 15 pseudo-differential channels - provides flexible signal routing for mixed-signal industrial I/O modules. |
Pinout & Package
MAX11328ATJ+T is housed in a 32-pin, 5mm × 5mm TQFN package with exposed pad (EP), rated for -40°C to +125°C operation. The package requires EP connection to GND for thermal and electrical performance compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOP / AON | Multiplexer output terminals | Provide direct access to mux output for external signal conditioning (e.g., filtering, gain) before ADC sampling - unique to MAX1132x family. |
| AIP / AIN | ADC analog input terminals | Accept conditioned differential input; externally accessible to enable precise impedance matching and noise mitigation. |
| REF+ / REF-/AIN15 | Differential reference input / dual-function pin | REF+ accepts 1V to VDD reference; REF-/AIN15 serves as negative reference or 16th analog input depending on configuration. |
| CNVST/AIN14 | Conversion start input / dual-function pin | Active-low trigger for conversion initiation; doubles as analog input 14 when not used for timing control. |
| VDD / OVDD | Analog and digital power supplies | VDD (2.35–3.6V) powers analog core; OVDD (1.5–3.6V) powers I/O - supports mixed-voltage microcontroller interfacing. |
| CS / SCLK / DIN / DOUT / EOC | 3-wire SPI-compatible interface | Enables direct connection to MCU SPI peripherals without glue logic; EOC indicates conversion completion in internal clock mode. |
Key Features
| Feature | Design Value |
|---|---|
| Post-Mux Signal Access (AOP/AON + AIP/AIN) | Enables external signal conditioning between multiplexer and ADC core - preserves differential integrity while allowing per-channel gain/anti-alias filtering. |
| SampleSet™ Channel Sequencing | Allows user-defined 256-step input sequence stored in on-chip memory - eliminates MCU polling overhead in multichannel monitoring applications. |
| Internal Clock Mode with FIFO | 16-entry FIFO buffers conversions at 1Msps, enabling burst sampling followed by slower readout - decouples acquisition and processing timing. |
| Configurable Input Modes | Per-channel selection of single-ended, fully differential, or pseudo-differential inputs with software-selectable bipolar ranges - simplifies hardware design across diverse sensor types. |
| AutoShutdown & Fast Wake-up | Reduces supply current to 2μA in full shutdown with <2μs wake-up - ideal for duty-cycled battery-powered sensors and wearables. |
Applications
| Industrial Motor Control | Portable ECG Monitor |
|---|---|
Use Scenario: Real-time sampling of phase currents and bus voltage in BLDC inverters with simultaneous multi-sensor acquisition. IC Role / Device Role / Timing Role: 12-bit, 16-channel ADC performing synchronized sampling of current shunts, temperature sensors, and DC-link voltage with post-mux filtering. Use Value: 1Msps rate captures PWM ripple; ±1 LSB INL ensures accurate torque calculation; differential inputs reject common-mode noise from switching nodes. |
Use Scenario: Battery-powered handheld device acquiring lead-II ECG, respiration, and SpO₂ analog signals. IC Role / Device Role / Timing Role: Low-power 12-bit ADC digitizing biopotential signals with programmable gain and anti-alias filtering via external op-amps on AOP/AON. Use Value: 5.4mW power at 1Msps extends battery life; 70dB SINAD preserves diagnostic fidelity; 2.35V minimum supply enables direct Li-ion cell operation. |
| Automated Test Equipment (ATE) | Smart Grid Sensor Node |
Use Scenario: Modular ATE slot card requiring high-accuracy, multi-channel voltage/current measurement with flexible input routing. IC Role / Device Role / Timing Role: Precision SAR ADC supporting scan-mode acquisition across 16 test points using SampleSet™ to interleave high- and low-frequency measurements. Use Value: Internal averaging improves SNR for noisy sensor readings; 16-entry FIFO absorbs timing jitter from host controller; SPI interface simplifies FPGA integration. |
Use Scenario: DIN-rail mounted grid monitor measuring voltage, current, harmonics, and temperature across three phases. IC Role / Device Role / Timing Role: Industrial-grade ADC acquiring synchronized samples from CTs, PTs, and thermistors with ±125°C operating range support. Use Value: -40°C to +125°C rating ensures reliability in outdoor enclosures; external reference input enables system-level calibration traceability; TQFN package fits space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 8-channel, 16-bit, SAR ADC; 500kSPS; SPI interface; no post-mux access or SampleSet™ sequencing. | Better resolution but lower channel count and no external signal conditioning access - suited for precision over flexibility. | Select when absolute accuracy >16 bits is required and channel count ≤8; avoid when external mux-output buffering or programmable sequencing is needed. |
| AD7961BCPZ | 16-bit, 1Msps, 8-channel SAR ADC; LVDS interface; no internal FIFO or configurable input modes. | Higher resolution and speed but requires LVDS-capable controller; lacks analog input flexibility and power-saving features like AutoShutdown. | Choose for high-fidelity oscilloscope-like acquisition where LVDS infrastructure exists; not suitable for low-power or mixed-input industrial field devices. |
Compared with ADS8688IPWR and AD7961BCPZ, MAX11328ATJ+T trades raw resolution for architectural flexibility - its post-mux pins, SampleSet™ sequencer, and 16-channel count make it uniquely suited for embedded systems requiring adaptive, low-overhead multichannel sensing without external logic.
Availability
MAX11328ATJ+T is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, automated test equipment, and smart grid sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11328ATJ+T 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 MAX1132x family was designed to address the need for flexible, low-power, multichannel data acquisition in space- and power-constrained embedded systems - emphasizing post-acquisition signal conditioning access and intelligent sequencing to reduce host processor load.
FAQ
What is the maximum sampling rate supported by MAX11328ATJ+T?
MAX11328ATJ+T supports a maximum conversion 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 rate is sustained across all 16 channels in scan mode without pipeline delay or missing codes.
Does MAX11328ATJ+T support differential input configurations?
Yes, MAX11328ATJ+T supports fully differential inputs (up to 12 pairs), pseudo-differential inputs (up to 15 channels relative to a common input), and single-ended inputs (up to 16 channels). Input mode is configured per channel via control registers, and the analog front-end maintains ±1 LSB INL/DNL across all configurations.
How does the SampleSet™ technology work in MAX11328ATJ+T?
SampleSet™ is a user-programmable channel sequencer that stores up to 256 conversion steps in on-chip memory. It allows arbitrary ordering of analog inputs - including repeats, skips, and mixed sampling rates - reducing MCU intervention. Once loaded, the sequencer runs autonomously in external clock mode, lowering system-level communication overhead.
What is the purpose of the AOP, AON, AIP, and AIN pins on MAX11328ATJ+T?
AOP and AON expose the output of the internal 16-channel multiplexer; AIP and AIN connect directly to the ADC's sampling network. This separation enables external signal conditioning - such as filtering or gain adjustment - between the mux and ADC, preserving differential integrity and improving noise immunity for demanding applications.
Can MAX11328ATJ+T operate from a single 3.3V supply?
Yes, MAX11328ATJ+T operates with VDD from 2.35V to 3.6V and OVDD from 1.5V to 3.6V. At VDD = 3.3V and fSAMPLE = 1Msps, it consumes 5.4mW and delivers 70dB SINAD at 100kHz. Both supplies must be independently bypassed: VDD with 10µF || 0.1µF, OVDD with same, and REF+ with 0.47µF to GND.
MAX11328ATJ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8, 15, 16
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- 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:
- 32-TQFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11328ATJ+T FAQ
1.How can I place an order for MAX11328ATJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11328ATJ+T 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 MAX11328ATJ+T reliable?
The price and inventory of MAX11328ATJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11328ATJ+T is usually 5 days.
3.What payment methods are accepted for MAX11328ATJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11328ATJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11328ATJ+T?
MAX11328ATJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11328ATJ+T 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 MAX11328ATJ+T?
For technical support, including MAX11328ATJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11328ATJ+T requirements.
6.How does Aetrix verify that MAX11328ATJ+T is sourced from the original manufacturer or authorized distributors?
All MAX11328ATJ+T 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 MAX11328ATJ+T meets industry standards.
7.What is the process for return or replacement of MAX11328ATJ+T?
All MAX11328ATJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11328ATJ+T, 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 MAX11328ATJ+T part is unused and in its original packaging.
Return procedure for MAX11328ATJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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