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Analog Devices Inc./Maxim Integrated MAX11325ATJ+T
- Part No.:
- MAX11325ATJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX11325ATJ+T.pdf
- Description:
- IC ADC 12BIT SAR 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
MAX11325ATJ+T from Maxim Integrated is a 12-bit, 8-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 enables flexible multichannel acquisition in battery-powered medical instrumentation and industrial control systems.
For engineers reviewing the MAX11325ATJ+T datasheet, MAX11325ATJ+T pinout, MAX11325ATJ+T application, or MAX11325ATJ+T equivalent, key selection criteria include external mux output access (AOP/AON), ADC input access (AIP/AIN), SampleSet™ programmable sequencing, internal FIFO, and 3-wire SPI-compatible interface with channel ID reporting.
Technical Context
The MAX11325ATJ+T implements a successive approximation register (SAR) architecture with integrated analog multiplexer and dual-clock mode support-internal oscillator for autonomous sampling with FIFO buffering and averaging, or external clock for SampleSet™-driven channel sequencing. Its post-mux signal access allows external conditioning between multiplexer outputs (AOP/AON) and ADC inputs (AIP/AIN).
It supports single-ended, fully differential, and pseudo-differential input configurations per channel, with software-selectable bipolar ranges (±VREF+/2 or ±VREF+) and external differential reference (1V to VDD). The 3-wire serial interface operates up to 16MHz with CPOL=CPHA=1, delivering 16-bit frames containing 4-bit channel ID + 12-bit result when CHAN_ID=1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 distinct digital codes for high-fidelity signal digitization |
| Conversion Rate | 1Msps - supports real-time sampling of fast transients without pipeline delay |
| INL / DNL | ±1 LSB - ensures monotonicity and no missing codes across full scale |
| SINAD | 70 dB at 100kHz - enables accurate measurement of low-distortion signals in noisy environments |
| Supply Voltage | 2.35V–3.6V - compatible with modern low-voltage microcontrollers and battery rails |
| Power Dissipation | 5.4 mW at 1Msps (3V) - extends runtime in portable instruments and sensor nodes |
| Input Configuration | 8-channel single-ended or 4-channel fully differential - configurable per application via control registers |
Pinout & Package
MAX11325ATJ+T is housed in a 32-pin, 5mm × 5mm 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 8-channel variant (MAX11324/MAX11325).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOP / AON | Multiplexer output terminals | Provide direct access to mux output for external filtering, gain, or isolation before ADC sampling |
| AIP / AIN | ADC analog input terminals | Accept conditioned signal; support differential, pseudo-differential, or single-ended topologies |
| REF+ / REF- | Differential reference inputs | Enable precise ratiometric measurement with external 1V–VDD reference source |
| CS / SCLK / DIN / DOUT | 3-wire SPI-compatible interface | Allow direct connection to MCU SPI peripherals without level shifters or glue logic |
| CNVST | Active-low conversion start | Triggers sampling on falling edge; supports hardware-synchronized acquisition |
| EOC | End-of-conversion indicator | Signals data validity in internal clock mode; enables interrupt-driven readout |
Key Features
| Feature | Design Value |
|---|---|
| Post-Mux Signal Access | Enables external signal conditioning (e.g., anti-alias filtering, PGA gain) between multiplexer and ADC core without degrading differential integrity |
| SampleSet™ Technology | Allows user-defined 256-entry channel sequence with per-channel input configuration, reducing host MCU polling overhead |
| Internal FIFO (16-entry) | Buffers conversions during high-speed acquisition, enabling burst sampling followed by slower host readout |
| Internal Averaging Mode | Improves SNR for noisy inputs by averaging multiple samples per channel in internal clock mode |
| Flexible Input Topology | Per-channel selection of single-ended, fully differential, or pseudo-differential with software-configurable bipolar range |
Applications
| Medical Instrumentation | Industrial Control Systems |
|---|---|
Use Scenario: Portable ECG monitor acquiring 8-lead biopotential signals with simultaneous noise rejection and gain staging. IC Role / Device Role / Timing Role: 12-bit SAR ADC performing synchronized 1Msps sampling across 8 channels with post-mux filtering and differential input support. Use Value: Enables high-resolution waveform capture while maintaining low power (5.4mW) and compact PCB layout via TQFN package. | Use Scenario: PLC analog input module measuring temperature, pressure, and current sensors across multiple field devices. IC Role / Device Role / Timing Role: Multichannel ADC with programmable SampleSet™ sequencing to handle mixed-signal sources at varying update rates. Use Value: Reduces host processor load by autonomously managing channel order and input configuration without firmware intervention. |
| Battery-Powered Instruments | High-Speed Data Acquisition |
Use Scenario: Handheld oscilloscope capturing transient events using undersampling techniques beyond Nyquist limit. IC Role / Device Role / Timing Role: ADC with 500MHz full-linear bandwidth supporting alias-free high-frequency signal analysis. Use Value: Delivers 70dB SINAD at 100kHz while consuming only 2μA in full shutdown-extending battery life between measurements. | Use Scenario: Closed-loop motor control system requiring deterministic timing for position, current, and voltage feedback. IC Role / Device Role / Timing Role: Low-latency SAR ADC with CNVST-triggered acquisition and EOC-synchronized readout. Use Value: Achieves sub-6µs conversion time with no pipeline delay, enabling tight control loop cycles at >100kHz update rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit resolution, 500ksps, integrated reference, no post-mux access | Higher precision but lower speed and no external signal conditioning path | Select when absolute accuracy > resolution trumps flexibility and speed |
| AD7928BRUZ | 12-bit, 8-channel, 1Msps, SPI interface, no SampleSet™ or FIFO | Lacks programmable sequencing and internal buffer-requires continuous host polling | Select when simpler control flow and legacy compatibility outweigh advanced features |
Compared with ADS8688IPWR and AD7928BRUZ, the MAX11325ATJ+T uniquely combines 1Msps speed, post-mux signal access, SampleSet™ sequencing, and internal FIFO-making it optimal for resource-constrained, high-flexibility multichannel acquisition where external conditioning and autonomous operation are critical.
Availability
MAX11325ATJ+T is available at Aetrix Electronics and suitable for medical instrumentation, industrial control systems, and battery-powered instruments requiring stable component supply, extended temperature operation (–40°C to +125°C), and long-term production continuity.
Supply support for MAX11325ATJ+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and automotive applications.
The MAX11321–MAX11328 product line was engineered to solve multichannel data acquisition challenges in space- and power-constrained systems-emphasizing flexibility (post-mux access), intelligence (SampleSet™), and efficiency (low-power SAR with FIFO).
FAQ
What is the maximum sampling rate supported by the MAX11325ATJ+T?
The MAX11325ATJ+T supports a maximum conversion rate of 1Msps in both internal and external clock modes. In external clock mode, this requires an SCLK frequency of up to 16MHz with 16 clock cycles per conversion. The device achieves this rate with no pipeline delay, making it suitable for real-time closed-loop control and transient capture applications where deterministic latency is essential.
Does the MAX11325ATJ+T support differential input configurations?
Yes, the MAX11325ATJ+T supports fully differential, pseudo-differential, and single-ended input configurations per channel. It provides dedicated AOP/AON (multiplexer outputs) and AIP/AIN (ADC inputs) pins to maintain signal integrity in differential mode. Input ranges are software-selectable: ±VREF+/2 or ±VREF+, and the device guarantees ±1 LSB INL/DNL across all topologies when operated within specified conditions.
How does the SampleSet™ feature improve system-level design with the MAX11325ATJ+T?
The SampleSet™ feature in the MAX11325ATJ+T allows users to define and load a custom 256-entry channel sequence with per-channel input configuration (e.g., gain, polarity, topology). This eliminates continuous host MCU polling, reduces communication overhead, and enables mixed-rate acquisition-such as sampling temperature sensors at 10Hz while capturing motor current at 100kHz-all autonomously within the ADC.
What reference voltage options are supported by the MAX11325ATJ+T?
The MAX11325ATJ+T accepts an external differential reference via REF+ (1V to VDD) and REF– (–0.3V to +1V). It does not include an internal reference. The reference input current is 36.7µA at 1Msps (VREF+ = 2.5V), and the device supports unipolar (0 to VREF+) and bipolar (±VREF+/2 or ±VREF+) input ranges depending on the RANGE bit setting in the mode register.
Is the MAX11325ATJ+T pin-compatible with other members of the MAX11321–MAX11328 family?
Yes, the MAX11325ATJ+T shares identical pinout and package (32-pin TQFN) with MAX11324 (8-channel, 10-bit), MAX11322 (4-channel, 12-bit), and MAX11328 (16-channel, 12-bit). All variants use the same footprint and electrical interface, allowing hardware reuse across resolution and channel-count variants-though register maps and performance specs differ per part number.
MAX11325ATJ+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:
- 4, 8
- 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:
- -
MAX11325ATJ+T FAQ
1.How can I place an order for MAX11325ATJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11325ATJ+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 MAX11325ATJ+T reliable?
The price and inventory of MAX11325ATJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11325ATJ+T is usually 5 days.
3.What payment methods are accepted for MAX11325ATJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11325ATJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11325ATJ+T?
MAX11325ATJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11325ATJ+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 MAX11325ATJ+T?
For technical support, including MAX11325ATJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11325ATJ+T requirements.
6.How does Aetrix verify that MAX11325ATJ+T is sourced from the original manufacturer or authorized distributors?
All MAX11325ATJ+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 MAX11325ATJ+T meets industry standards.
7.What is the process for return or replacement of MAX11325ATJ+T?
All MAX11325ATJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11325ATJ+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 MAX11325ATJ+T part is unused and in its original packaging.
Return procedure for MAX11325ATJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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