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Analog Devices Inc./Maxim Integrated MAX11338ATJ+
- Part No.:
- MAX11338ATJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX11338ATJ+.pdf
- Description:
- IC ADC 10BIT SAR 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:220
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Product details
Overview
The MAX11338ATJ+ from Analog Devices is a 10-bit, 4-channel SAR analog-to-digital converter with external reference support, 500ksps conversion rate, ±0.4 LSB INL, 61.5dB SINAD at 100kHz, and operation from 2.35V to 3.6V supply - used in high-speed industrial control and portable instrumentation for multichannel voltage monitoring with post-mux signal conditioning access.
For engineers reviewing the MAX11338ATJ+ datasheet, MAX11338ATJ+ pinout, MAX11338ATJ+ application, or MAX11338ATJ+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-ready availability details - all grounded in the official MAX11335–MAX11340 family datasheet (Rev 2, June 2021).
Technical Context
The MAX11338ATJ+ implements a successive approximation register (SAR) architecture with dual clock modes: internal clock mode featuring integrated FIFO and programmable averaging to improve SNR, and external clock mode using SampleSet™ technology for user-defined channel sequencing up to 256 entries. It supports single-ended, fully differential, and pseudo-differential input configurations per channel.
It provides external access to multiplexer outputs (AOP/AON) and ADC inputs (AIP/AIN), enabling external signal conditioning between stages. The device uses a 3-wire SPI/QSPI/MICROWIRE-compatible interface with CS, SCLK, DIN, and DOUT, operating at up to 8MHz SCLK and supporting channel ID embedding in output data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for moderate-precision measurement applications requiring compact size and low power. |
| Conversion Rate | 500ksps - enables real-time sampling of fast transients in closed-loop control systems without pipeline delay. |
| INL / DNL | ±0.4 LSB / No missing codes - ensures monotonicity and accurate representation of linear sensor outputs across full scale. |
| SINAD @ 100kHz | 61.5dB typical - supports accurate digitization of medium-bandwidth signals such as motor current feedback or vibration sensing. |
| Supply Voltage | 2.35V to 3.6V - compatible with modern low-voltage microcontrollers and battery-powered systems including Li-ion and coin-cell designs. |
| Power Dissipation | 4.2mW at 500ksps (3V) - extends runtime in portable instruments while maintaining high-speed acquisition capability. |
| Input Configuration | 4-channel single-ended - matches compact sensor arrays or multi-point voltage monitoring where space and channel count are constrained. |
Pinout & Package
Package: 32-pin, 5mm × 5mm TQFN with exposed pad (EP), rated for -40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–10, 17, 19 | GND | Analog ground reference plane; multiple pins reduce impedance and improve noise immunity in mixed-signal layouts. |
| 11 | AOP | Multiplexer positive output - allows external filtering or gain stage before ADC input AIP, critical for differential signal integrity. |
| 12 | AON | Multiplexer negative output - paired with AOP to enable true differential signal conditioning prior to AIP/AIN. |
| 13 | AIP | ADC positive input - directly accepts conditioned signal from AOP or external source; input capacitance 7.5pF (bipolar mode). |
| 14 | AIN | ADC negative input - complements AIP for fully differential acquisition; supports common-mode rejection when driven differentially. |
| 15 | CNVST | Active-low conversion start - initiates sampling on falling edge; also serves as analog input AIN14 in higher-channel variants (not used in MAX11338). |
| 16 | REF- | External differential reference negative input - sets lower bound of input range; valid from -0.3V to +1V. |
| 18 | REF+ | External positive reference input - accepts 1V to VDD+50mV; requires 0.47µF bypass capacitor to GND for stability. |
| 20, 21 | VDD | Analog power supply - 2.35V–3.6V; must be decoupled with 10µF + 0.1µF capacitors per pin to suppress switching noise. |
| 22 | SCLK | Serial clock input - clocks data on rising edge (DIN) and falling edge (DOUT); max 8MHz, 40–60% duty cycle. |
| 23 | CS | Active-low chip select - enables serial interface when low; places DOUT in high-impedance state when high. |
| 24 | DIN | Serial data input - carries configuration bits (e.g., mode control, channel selection) latched on SCLK rising edge. |
| 25 | DGND | Digital I/O ground - isolated from analog GND to minimize digital noise coupling into sensitive analog paths. |
| 26 | OVDD | Digital I/O supply - 1.5V–3.6V; powers serial interface logic; bypassed with 10µF + 0.1µF capacitors. |
| 27 | DOUT | Serial data output - delivers 16-bit frame (4-bit channel ID + 12-bit result) on SCLK falling edge; three-state when CS high. |
| 28 | EOC | End-of-conversion output - active-low pulse indicates data validity in internal clock mode only; not functional in external clock mode. |
| 29–32 | AIN0–AIN3 | Analog input channels - 4 dedicated single-ended inputs; configurable as pseudo-differential pairs relative to common input. |
| EP | Exposed Pad | Thermal and electrical ground connection - must be soldered directly to PCB GND plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| SampleSet™ Technology | User-programmable 256-entry channel sequencer reduces microcontroller overhead in multichannel polling, enabling autonomous acquisition patterns. |
| Post-Mux Signal Access (AOP/AON → AIP/AIN) | Enables external PGA, filter, or isolation stage between multiplexer and ADC core - essential for high-accuracy differential measurements. |
| Internal FIFO + Averaging | 16-entry FIFO buffers high-speed samples for later readout; internal averaging improves effective SNR by suppressing uncorrelated noise. |
| Bipolar Input Ranges | Software-selectable ±VREF+/2 or ±VREF+ ranges simplify interfacing with bipolar sensors (e.g., accelerometers, current shunts) without external level-shifting. |
| Low-Power AutoShutdown™ | 2µA full-shutdown current extends battery life in intermittent-sampling applications like condition monitoring or data loggers. |
Applications
| Industrial Process Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Real-time monitoring of temperature, pressure, and flow sensor outputs in PLC-based control cabinets with limited board space. IC Role / Device Role / Timing Role: 4-channel voltage digitizer with external reference and post-mux conditioning for sensor signal chain flexibility. Use Value: Eliminates need for external multiplexers and op-amp buffers, reducing BOM count and layout area while maintaining ±0.4 LSB linearity. |
Use Scenario: Battery-powered handheld ECG or pulse oximeter acquiring analog biopotential signals from multiple electrodes. IC Role / Device Role / Timing Role: Low-power 10-bit ADC with bipolar input support and 500ksps rate for oversampled bio-signal capture. Use Value: 4.2mW power at full speed enables >24-hour operation on a single CR2032 cell while meeting clinical-grade SNR requirements. |
| Automotive Diagnostic Tools | Energy Metering Subsystems |
Use Scenario: OBD-II scan tools measuring battery voltage, coolant temp, and throttle position across multiple analog inputs. IC Role / Device Role / Timing Role: Compact 4-channel ADC with wide supply range (2.35V–3.6V) tolerant of automotive battery fluctuations. Use Value: Internal clock mode with FIFO allows burst sampling during ignition events, then low-speed readout to conserve MCU resources. |
Use Scenario: Smart meter auxiliary channels monitoring auxiliary voltages, tamper detection signals, or transformer health indicators. IC Role / Device Role / Timing Role: Precision ADC with external reference input for calibrated voltage measurement independent of supply rail variations. Use Value: ±0.4 LSB INL and 61.5dB SINAD ensure metrology-grade accuracy over temperature (-40°C to +125°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8664IPWR | 12-bit resolution, 500ksps, SPI interface, internal reference only; no post-mux access or SampleSet™ sequencing. | Requires external reference buffer if external VREF needed; lacks AOP/AON pins for external conditioning. | Select when higher resolution is prioritized over flexible signal chain architecture and external reference support. |
| AD7957BCPZ-RL7 | 14-bit, 1MSPS, pseudo-differential 8-channel; no internal FIFO, no SampleSet™, no AOP/AON pins. | Higher speed/resolution but no provision for external signal conditioning between mux and ADC core. | Select for high-fidelity transient capture where post-mux flexibility is unnecessary and internal reference suffices. |
Compared with ADS8664IPWR and AD7957BCPZ-RL7, the MAX11338ATJ+ uniquely combines 4-channel single-ended acquisition, external reference support, post-mux signal access, and SampleSet™ programmable sequencing - making it optimal for space-constrained, low-power systems requiring adaptable analog front-end integration.
Availability
The MAX11338ATJ+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical sensors, automotive diagnostic tools, and energy metering subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11338ATJ+ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX11335–MAX11340 family was designed for high-speed, low-power, multichannel data acquisition in space- and power-constrained environments - emphasizing flexible input configuration, external signal conditioning access, and intelligent sequencing to reduce host processor load.
FAQ
What is the maximum sampling rate of the MAX11338ATJ+?
The MAX11338ATJ+ achieves a guaranteed 500ksps conversion rate in both internal and external clock modes. This rate is maintained across the full operating temperature range (-40°C to +125°C) and supply voltage range (2.35V to 3.6V), with no pipeline delay - enabling deterministic timing for closed-loop control applications. The MAX11338ATJ+ does not support oversampling beyond this rate without firmware-level decimation.
Does the MAX11338ATJ+ support differential input configurations?
Yes, the MAX11338ATJ+ supports fully differential, pseudo-differential, and single-ended input modes via software configuration. Although it is a 4-channel device, its AIP/AIN inputs accept true differential pairs, and AOP/AON pins provide external access to the multiplexer outputs - allowing designers to implement external differential drivers or filters. The MAX11338ATJ+ datasheet confirms full-differential operation with 61.5dB SINAD at 100kHz under these conditions.
What reference voltage options does the MAX11338ATJ+ support?
The MAX11338ATJ+ requires an external differential reference: REF+ accepts 1V to VDD+50mV, and REF- accepts -0.3V to +1V. It does not include an internal reference. The device supports two bipolar input ranges (±VREF+/2 or ±VREF+) selected via the RANGE bit, enabling direct interfacing with bipolar sensors. Reference current draw is 36.7µA at 500ksps with VREF+ = 2.5V - a value explicitly specified for the MAX11338ATJ+ in the datasheet.
How does the SampleSet™ feature work on the MAX11338ATJ+?
SampleSet™ is a user-programmable channel sequencer that stores up to 256 entries defining acquisition order, input configuration (single/diff/pseudo-diff), and range selection per channel. Loaded via the SPI interface, it operates autonomously - freeing the host MCU from polling overhead. For the MAX11338ATJ+, this enables efficient scanning of its 4 analog inputs with mixed configurations, confirmed in the MAX11335–MAX11340 family datasheet as functional across all variants including MAX11338ATJ+.
What is the purpose of the AOP and AON pins on the MAX11338ATJ+?
AOP and AON are the positive and negative outputs of the internal analog multiplexer - exposed externally to allow signal conditioning (e.g., filtering, amplification, isolation) between the mux and ADC core. This architecture lets designers place a single external PGA or anti-alias filter ahead of AIP/AIN, improving SNR and THD. The MAX11338ATJ+ datasheet explicitly states this capability applies to all members of the MAX11335–MAX11340 family, including MAX11338ATJ+.
MAX11338ATJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 500k
- 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:
- -
MAX11338ATJ+ FAQ
1.How can I place an order for MAX11338ATJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11338ATJ+ 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 MAX11338ATJ+ reliable?
The price and inventory of MAX11338ATJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11338ATJ+ is usually 5 days.
3.What payment methods are accepted for MAX11338ATJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11338ATJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11338ATJ+?
MAX11338ATJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11338ATJ+ 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 MAX11338ATJ+?
For technical support, including MAX11338ATJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11338ATJ+ requirements.
6.How does Aetrix verify that MAX11338ATJ+ is sourced from the original manufacturer or authorized distributors?
All MAX11338ATJ+ 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 MAX11338ATJ+ meets industry standards.
7.What is the process for return or replacement of MAX11338ATJ+?
All MAX11338ATJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11338ATJ+, 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 MAX11338ATJ+ part is unused and in its original packaging.
Return procedure for MAX11338ATJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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