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Analog Devices Inc./Maxim Integrated MAX11044ETN+
- Part No.:
- MAX11044ETN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 56-WFQFN Exposed Pad
- Datasheet:
-
MAX11044ETN+.pdf
- Description:
- IC ADC 16BIT SAR 56TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,032
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Product details
Overview
MAX11044ETN+ from Maxim Integrated is a 4-channel, 16-bit simultaneous-sampling analog-to-digital converter with independent track-and-hold per channel, 250ksps throughput per channel, ±5V input range, and 56-pin TQFN-EP package. It delivers 92.3dB SNR and 100ps channel-to-channel T/H matching for precision power-grid protection and multiphase motor control systems.
For engineers reviewing the MAX11044ETN+ datasheet, MAX11044ETN+ pinout, MAX11044ETN+ application, or MAX11044ETN+ equivalent, this page provides verified electrical specifications, functional pin definitions, real-world use cases in automatic test equipment and vibration analysis, and validated alternative parts for design flexibility.
Technical Context
The MAX11044ETN+ implements SAR architecture with dedicated T/H circuitry per input channel, enabling true simultaneous sampling across all four analog inputs without inter-channel skew. Its internal 4.096V reference supports ±5V full-scale operation, while external reference support (3.0V–4.25V) allows configurable input ranges from ±4.0V to ±5.2V.
Digital interface uses a 20MHz bidirectional parallel bus (DB0–DB15) with active-low RD/WR/CS/CONVST controls and EOC signaling. Analog and digital supplies are fully decoupled: AVDD = 4.75V–5.25V, DVDD = 2.7V–5.25V, enabling direct interfacing with 3.3V or 5V host systems without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees 1 part-in-65,536 quantization resolution for high-fidelity waveform capture |
| Sampling Rate | 250ksps per channel - enables real-time monitoring of 50/60Hz power systems with >4000 samples/cycle |
| Input Range | ±5V - matches standard industrial sensor outputs and isolator interfaces without external scaling |
| SNR | 92.3dB (typ) - supports >15 effective bits (ENOB ≈ 15.1) at 10kHz input, critical for harmonic analysis |
| Channel Matching | 100ps T/H aperture delay matching - ensures sub-0.01° phase error at 50Hz for synchronized multi-sensor acquisition |
| Reference | 4.096V internal reference (±5ppm/°C) - eliminates external reference component cost and layout complexity |
| Supply Voltages | AVDD: 4.75–5.25V; DVDD: 2.7–5.25V - allows mixed-voltage system integration without level translation |
Pinout & Package
Package: 56-pin TQFN-EP (8mm × 8mm, exposed pad), RoHS-compliant, rated for -40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog Input Channels | Four independent ±5V differential-capable inputs with ±20mA internal clamps; each has dedicated T/H |
| DB0–DB15 | Parallel Data Bus | 16-bit bidirectional bus: outputs conversion results, accepts configuration register writes (CR0–CR3 on DB0–DB3) |
| CONVST | Convert Start | Rising-edge-triggered sample-and-hold initiation; defines precise simultaneous sampling instant across all channels |
| EOC | End-of-Conversion | Active-low open-drain signal indicating completion of conversion cycle; used for interrupt-driven host reads |
| RDC | Reference Decoupling | Reference buffer output requiring ≥80μF total capacitance to AGND; critical for low-noise reference stability |
| REFIO | Reference I/O | Internal 4.096V reference output or external reference input (3.0–4.25V); bypass with 0.1μF to AGND |
| SHDN | Shutdown Control | Active-high input reducing total supply current to ≤10μA; retains configuration register contents during sleep |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sampling | Four independent T/H circuits eliminate inter-channel timing skew-essential for vector measurements in power systems |
| High Input Impedance | ≥1GΩ input resistance enables direct connection to high-impedance sensors without loading or buffering |
| Overrange Protection | Integrated ±20mA input clamps allow robust operation with simple series resistors-no external TVS required |
| Flexible Reference | Switchable between precision internal 4.096V reference or user-supplied 3.0–4.25V source for custom full-scale ranges |
| Low Aperture Jitter | 50ps RMS jitter ensures <0.001% SNR degradation at 10kHz-critical for spectral purity in waveform analysis |
Applications
| Power-Grid Protection | Multiphase Motor Control |
|---|---|
|
Use Scenario: Real-time fault detection in medium-voltage substations using voltage and current transformer outputs. IC Role / Device Role / Timing Role: Simultaneous acquisition of 4 CT/VT signals for sequence component calculation and relay tripping logic. Use Value: 100ps channel matching ensures <0.01° phase error at 50Hz, enabling accurate zero-sequence detection within 1ms response window. |
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase PMSM drives with DC-link and phase current sensing. IC Role / Device Role / Timing Role: Synchronized sampling of DC-link voltage, U/V/W phase currents for instantaneous torque estimation. Use Value: 250ksps per channel supports >10x oversampling at 10kHz PWM frequency, improving current reconstruction fidelity. |
| Automatic Test Equipment | Vibration and Waveform Analysis |
|
Use Scenario: Production-line functional testing of power supplies and inverters requiring multi-point voltage/current validation. IC Role / Device Role / Timing Role: High-speed digitization of transient waveforms (inrush, turn-on, fault recovery) across 4 test points. Use Value: 3µs conversion time and parallel interface enable <100ns timestamp resolution between sampled events for pass/fail margining. |
Use Scenario: Structural health monitoring using piezoelectric sensor arrays on rotating machinery or bridges. IC Role / Device Role / Timing Role: Simultaneous capture of acceleration, strain, and temperature signals for modal analysis and FFT-based defect identification. Use Value: 92.3dB SNR and 14-bit ENOB preserve low-amplitude harmonics (<−100dB) essential for early bearing fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11044ECB+ | Same 4-channel, 16-bit specs but in 64-pin TQFP-EP package (10mm × 10mm); identical electrical performance and pin-compatible functionality | Preferred for through-hole prototyping or legacy PCBs with larger pad layouts; higher thermal mass suits extended industrial ambient conditions | Select when board space permits larger footprint or when TQFP reflow compatibility is required in existing assembly lines |
| AD7606C-16 | 8-channel, 16-bit SAR ADC with 1MSPS aggregate rate (125ksps/channel), ±10V input range, and integrated analog front-end (PGA, anti-alias filter) | Better suited for higher channel count or wider dynamic range needs; lacks 100ps T/H matching and simultaneous 4-channel 250ksps capability | Choose when expanding beyond 4 channels or requiring programmable gain; avoid when sub-0.01° phase coherence across all channels is mandatory |
Compared with MAX11044ECB+, the MAX11044ETN+ offers superior thermal performance in compact layouts due to its smaller TQFN footprint and exposed pad; compared with AD7606C-16, it delivers tighter channel synchronization at full speed but requires external signal conditioning for ranges beyond ±5V.
Availability
MAX11044ETN+ is available at Aetrix Electronics and suitable for power-grid protection, multiphase motor control, and automatic test equipment requiring stable component supply, long-term production continuity, and guaranteed RoHS-compliant sourcing.
Supply support for MAX11044ETN+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on precision data conversion and power management.
The MAX11044 family targets high-fidelity, multi-channel acquisition in electric utility infrastructure and industrial automation-designed specifically for simultaneous sampling accuracy, robust overvoltage tolerance, and seamless integration into real-time control loops.
FAQ
What is the maximum sampling rate per channel for the MAX11044ETN+?
The MAX11044ETN+ achieves 250ksps per channel under simultaneous sampling mode. This rate is maintained across all four channels concurrently, supported by independent track-and-hold circuitry and a 20MHz parallel interface. Conversion time is fixed at 3µs, and acquisition time is specified at 1000µs, ensuring deterministic timing for real-time control applications.
Does the MAX11044ETN+ require an external reference voltage?
No, the MAX11044ETN+ includes a low-drift 4.096V internal reference with ±5ppm/°C temperature coefficient, enabling immediate ±5V full-scale operation without external components. However, REFIO also accepts an external reference from 3.0V to 4.25V, allowing customization of input range (e.g., ±4.0V to ±5.2V) when higher accuracy or different scaling is needed.
How does the MAX11044ETN+ handle overvoltage conditions on analog inputs?
The MAX11044ETN+ integrates ±20mA input clamps on each CH0–CH3 pin, providing robust overrange protection. When paired with a simple external series resistor (e.g., 250Ω), these clamps limit input current to safe levels during ±7.5V transients. This eliminates the need for discrete TVS diodes or op-amp buffers in most industrial sensor interfacing scenarios.
What is the significance of the RDC pin on the MAX11044ETN+?
The RDC pin is the output of the internal reference buffer, requiring ≥80μF total capacitance to AGND for stability. It must be connected to all other RDC pins (pins 22, 28, 35, 43, 49) and bypassed directly to AGND. Proper RDC decoupling is essential to maintain reference noise below 10µV RMS-failure to meet this requirement degrades SNR and increases INL beyond specification.
Can the MAX11044ETN+ operate with a 3.3V digital supply?
Yes, the MAX11044ETN+ supports DVDD from 2.7V to 5.25V, making it fully compatible with 3.3V host systems. Digital supply current is 5.5mA (typ) at 3.3V and 250ksps, and all digital I/O thresholds (VIH = 2V, VIL = 0.8V) are compatible with standard 3.3V CMOS logic-no level-shifting circuitry is required for interfacing with FPGA or microcontroller peripherals.
MAX11044ETN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 56-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 4
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 56-TQFN (8x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11044ETN+ FAQ
1.How can I place an order for MAX11044ETN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11044ETN+ 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 MAX11044ETN+ reliable?
The price and inventory of MAX11044ETN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11044ETN+ is usually 5 days.
3.What payment methods are accepted for MAX11044ETN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11044ETN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11044ETN+?
MAX11044ETN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11044ETN+ 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 MAX11044ETN+?
For technical support, including MAX11044ETN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11044ETN+ requirements.
6.How does Aetrix verify that MAX11044ETN+ is sourced from the original manufacturer or authorized distributors?
All MAX11044ETN+ 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 MAX11044ETN+ meets industry standards.
7.What is the process for return or replacement of MAX11044ETN+?
All MAX11044ETN+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11044ETN+, 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 MAX11044ETN+ part is unused and in its original packaging.
Return procedure for MAX11044ETN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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