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Analog Devices Inc./Maxim Integrated MAX11322ATJ+T
- Part No.:
- MAX11322ATJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX11322ATJ+T.pdf
- Description:
- IC ADC 12BIT SAR 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,933
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Product details
Overview
MAX11322ATJ+T from Maxim Integrated is a 12-bit, 4-channel SAR analog-to-digital converter with post-mux external signal conditioning access, 1Msps conversion rate, ±1 LSB INL/DNL, and 70dB SINAD at 100kHz. It operates from 2.35V–3.6V, consumes 5.4mW at full speed, and supports single-ended, pseudo-differential, and fully differential input configurations for high-precision data acquisition in portable instrumentation.
For engineers reviewing the MAX11322ATJ+T datasheet, MAX11322ATJ+T pinout, MAX11322ATJ+T application, or MAX11322ATJ+T equivalent, key selection criteria include its SampleSet™ programmable channel sequencing, external multiplexer output access (AOP/AON), internal FIFO for burst sampling, ±VREF+/2 or ±VREF+ bipolar input ranges, and 32-pin 5mm × 5mm TQFN package with -40°C to +125°C operation.
Technical Context
The MAX11322ATJ+T implements a successive approximation register (SAR) architecture with integrated analog multiplexer and external-accessible mux outputs (AOP/AON) and ADC inputs (AIP/AIN), enabling external signal conditioning between stages-even for differential signals. It supports both internal clock mode (with 16-entry FIFO and configurable averaging) and external clock mode (with SampleSet™ sequencer supporting up to 256-channel sequences).
Its analog front-end allows per-channel configuration of input type (single-ended, pseudo-differential, or fully differential) and bipolar range selection via RANGE bit. The 3-wire SPI/QSPI/MICROWIRE-compatible interface runs at up to 16MHz SCLK, with CS-active frame-based communication delivering 16-bit words containing channel ID and 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-resolution measurement of sensor or transducer outputs. |
| Conversion Rate | 1Msps - supports real-time sampling of fast transient events without pipeline delay or latency accumulation. |
| INL / DNL | ±1 LSB - ensures monotonicity and accurate end-point linearity critical for closed-loop control feedback paths. |
| SINAD | 70 dB at 100kHz - enables clean digitization of medium-bandwidth signals such as motor current sensing or audio pre-processing. |
| Supply Range | 2.35V–3.6V - compatible with modern low-voltage microcontrollers and battery-powered systems down to single-cell Li-ion. |
| Power Dissipation | 5.4 mW at 1Msps (3V) - extends runtime in portable instruments while maintaining high-speed performance. |
| Input Configuration | Single-ended / pseudo-differential / fully differential - provides flexibility to match diverse sensor interfaces without external mux reconfiguration. |
Pinout & Package
MAX11322ATJ+T is housed in a 32-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 (MAX11322).
| 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 input-enabling signal conditioning even in differential mode. |
| AIP / AIN | ADC analog input terminals | Accept conditioned signal; support fully differential tracking/hold with 500MHz small-signal bandwidth for high-fidelity sampling. |
| REF+ / REF- | Differential reference inputs | Accept external 1V–VDD reference; enable precise ratiometric or absolute measurements independent of supply variation. |
| CS / SCLK / DIN / DOUT | 3-wire serial interface | Enable SPI/QSPI/MICROWIRE-compatible communication at up to 16MHz; DOUT delivers 16-bit frames with channel ID and 12-bit result. |
| CNVST | Active-low conversion start | Triggers sampling on falling edge; supports hardware-synchronized acquisition across multiple sensors or time-critical control loops. |
| VDD / OVDD / DGND / GND | Power and ground domains | Separate analog (VDD/GND) and digital I/O (OVDD/DGND) supplies reduce noise coupling and improve SNR in mixed-signal systems. |
Key Features
| Feature | Design Value |
|---|---|
| Post-Mux Signal Access | External pins AOP/AON and AIP/AIN allow insertion of external PGA, filter, or isolation stage between mux and ADC-preserving differential integrity while adding system-level flexibility. |
| SampleSet™ Sequencing | User-programmable 256-step channel sequence reduces MCU overhead in multichannel monitoring, enabling autonomous scanning of mixed slow/fast inputs (e.g., temperature + vibration). |
| Internal FIFO & Averaging | 16-entry FIFO buffers high-speed samples for later readout; internal averaging improves SNR by up to 3dB for noisy industrial sensor signals without firmware intervention. |
| Bipolar Input Ranges | Software-selectable ±VREF+/2 or ±VREF+ ranges simplify interfacing with bipolar transducers (e.g., strain gauges, accelerometers) without external level-shifting circuitry. |
| Low-Power Shutdown | 2μA full shutdown current and AutoShutdown™ mode minimize quiescent power in battery-operated devices during idle periods while retaining fast wake-up capability. |
Applications
| Industrial Sensor Hub | Portable Medical Monitor |
|---|---|
Use Scenario: Simultaneous acquisition of 4 pressure, temperature, and flow sensors in a compact PLC module with limited PCB area and thermal budget. IC Role / Device Role / Timing Role: 4-channel SAR ADC performing synchronized sampling with external anti-alias filtering and programmable channel sequencing via SampleSet™. Use Value: Eliminates need for external mux and timing controller; 5.4mW power enables fanless enclosure design while maintaining 1Msps throughput for responsive control loop updates. | Use Scenario: Battery-powered ECG front-end acquiring lead-I, II, III, and respiration signals with clinical-grade linearity and low noise. IC Role / Device Role / Timing Role: Precision ADC providing 12-bit resolution, ±1 LSB INL, and 70dB SINAD at 100kHz for diagnostic-quality waveform capture. Use Value: Bipolar input ranges directly accept differential ECG signals; post-mux access allows integration of ultra-low-noise instrumentation amplifier before AIP/AIN without sacrificing layout simplicity. |
| Motor Control Feedback Unit | High-Speed Data Logger |
Use Scenario: Real-time current and voltage sampling in a 3-phase inverter for field-oriented control, requiring sub-microsecond timing consistency and minimal latency. IC Role / Device Role / Timing Role: Low-latency SAR ADC with 1000ns conversion time (external clock mode) and CNVST-triggered acquisition aligned to PWM edges. Use Value: No pipeline delay ensures deterministic sampling timing; internal FIFO decouples sampling rate from processor bus speed, simplifying real-time firmware architecture. | Use Scenario: Compact environmental logger recording temperature, humidity, and acoustic emission from machinery over weeks on a single coin cell. IC Role / Device Role / Timing Role: Ultra-low-power ADC operating in AutoShutdown™ mode, waking only for scheduled 10s-interval measurements with internal averaging. Use Value: 2μA shutdown current and 1.5V–3.6V OVDD support extend battery life beyond 12 months; TQFN package enables conformal coating for harsh deployment environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit resolution, 500ksps max, integrated reference, no post-mux access, SPI-only interface | Better resolution for precision DC measurements; lacks SampleSet™ and external signal conditioning flexibility | Select when absolute accuracy > speed or external conditioning is unnecessary; not drop-in due to different pinout and feature set |
| AD7957BCPZ | 14-bit, 1.5Msps, no internal FIFO, no SampleSet™, requires external reference, 4-channel with shared S/H | Higher speed and resolution but no programmable sequencing or mux-output access for external conditioning | Choose for higher throughput where external signal chain is fixed; requires additional logic for channel management |
Compared with ADS8684IPWR and AD7957BCPZ, the MAX11322ATJ+T uniquely combines 12-bit/1Msps performance with post-mux signal access and SampleSet™ sequencing-enabling adaptive multichannel acquisition with minimal host intervention and external component count.
Availability
MAX11322ATJ+T is available at Aetrix Electronics and suitable for industrial sensor hubs, portable medical monitors, motor control feedback units, and high-speed data loggers requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for MAX11322ATJ+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 MAX1132x family targets high-speed, low-power data acquisition systems requiring flexible input configuration, external signal conditioning access, and intelligent channel sequencing-optimized for space-constrained, battery-sensitive, and thermally challenging deployments.
FAQ
What is the maximum sampling rate of the MAX11322ATJ+T?
The MAX11322ATJ+T achieves a maximum conversion rate of 1 million samples per second (1Msps) in both internal and external clock modes. At 1Msps with 3V supply, it consumes 5.4mW and maintains ±1 LSB INL/DNL and 70dB SINAD at 100kHz. Conversion time is 5.9µs (internal clock) or 1000ns (external clock with 16MHz SCLK), with no pipeline delay-making MAX11322ATJ+T suitable for real-time control and transient capture.
Does the MAX11322ATJ+T support differential input signals?
Yes, the MAX11322ATJ+T supports fully differential, pseudo-differential, and single-ended analog inputs. In fully differential mode, it accepts signals across AIP–AIN with operational input voltage difference ranging from –VREF+/2 to +VREF+/2 (or –VREF+ to +VREF+ when RANGE bit = 1). Its 500MHz full-linear bandwidth and external access to AOP/AON and AIP/AIN allow differential signal conditioning before digitization-preserving common-mode rejection and noise immunity in MAX11322ATJ+T implementations.
How does the SampleSet™ technology work in the MAX11322ATJ+T?
SampleSet™ is a user-programmable channel sequencer in the MAX11322ATJ+T that allows defining custom acquisition orders of up to 256 steps. It operates in external clock mode and offloads sequencing logic from the host MCU-reducing communication overhead and system noise. Each step specifies channel, input configuration, and range. This enables efficient sampling of heterogeneous inputs (e.g., slow temperature + fast vibration) without CPU polling, making MAX11322ATJ+T ideal for autonomous data loggers and distributed sensor networks.
What package type and thermal specifications apply to the MAX11322ATJ+T?
The MAX11322ATJ+T uses a 32-pin, 5mm × 5mm, 0.5mm pitch TQFN package with exposed pad (EP), rated for operation from –40°C to +125°C. Its junction-to-ambient thermal resistance (θJA) is 29°C/W on a four-layer board. The EP must be soldered directly to the PCB ground plane for guaranteed performance and thermal reliability. This compact, thermally robust package supports high-density layouts in industrial and automotive modules where MAX11322ATJ+T is deployed.
Can the MAX11322ATJ+T operate with a 1.8V I/O supply?
Yes, the MAX11322ATJ+T supports digital I/O voltage (OVDD) from 1.5V to 3.6V, making it compatible with 1.8V microcontrollers and FPGAs. Its digital inputs (CS, SCLK, DIN) accept VIH ≥ 0.75×OVDD and VIL ≤ 0.25×OVDD, while DOUT drives VOH ≥ 0.85×OVDD and VOL ≤ 0.15×OVDD at 200µA load. This allows seamless interfacing with low-voltage logic without level shifters-critical for power-sensitive MAX11322ATJ+T designs in portable and IoT edge devices.
MAX11322ATJ+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:
- 2, 4
- 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:
- -
MAX11322ATJ+T FAQ
1.How can I place an order for MAX11322ATJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11322ATJ+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 MAX11322ATJ+T reliable?
The price and inventory of MAX11322ATJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11322ATJ+T is usually 5 days.
3.What payment methods are accepted for MAX11322ATJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11322ATJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11322ATJ+T?
MAX11322ATJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11322ATJ+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 MAX11322ATJ+T?
For technical support, including MAX11322ATJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11322ATJ+T requirements.
6.How does Aetrix verify that MAX11322ATJ+T is sourced from the original manufacturer or authorized distributors?
All MAX11322ATJ+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 MAX11322ATJ+T meets industry standards.
7.What is the process for return or replacement of MAX11322ATJ+T?
All MAX11322ATJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11322ATJ+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 MAX11322ATJ+T part is unused and in its original packaging.
Return procedure for MAX11322ATJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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