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Analog Devices Inc./Maxim Integrated MAX11044BETN+T
- Part No.:
- MAX11044BETN+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 56-WFQFN Exposed Pad
- Datasheet:
-
MAX11044BETN+T.pdf
- Description:
- IC ADC 16BIT SAR 56TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,021
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Product details
Overview
MAX11044BETN+T 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, 100ps channel-to-channel T/H matching, and operates over –40°C to +85°C for precision power-grid protection systems.
For engineers reviewing the MAX11044BETN+T datasheet, MAX11044BETN+T pinout, MAX11044BETN+T application, or MAX11044BETN+T equivalent, this page provides verified specifications, functional pin mapping, real-world use cases in multiphase motor control and vibration analysis, and validated alternative options for design continuity.
Technical Context
The MAX11044BETN+T implements SAR architecture with dedicated track-and-hold circuits per input channel, enabling true simultaneous sampling across all four analog inputs. Its internal 4.096V reference supports ±5V full-scale operation, while the 20MHz bidirectional parallel interface allows direct host microcontroller connection without level shifting.
It features dual-supply operation: 4.75V–5.25V analog supply (AVDD) and flexible 2.7V–5.25V digital supply (DVDD), decoupled via on-chip RDC sense and external 80μF bulk capacitance. Input clamps provide ±20mA overrange protection with external resistor limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes for high-fidelity waveform digitization |
| Sampling Rate | 250ksps per channel - enables real-time capture of 10kHz signals with >5× Nyquist margin |
| Input Range | ±5V - matches standard industrial sensor outputs and isolation amplifier ranges |
| SNR | 92.3dB (typ) - supports >15-bit effective resolution in noise-critical applications |
| Channel Matching | 100ps T/H aperture delay matching - ensures sub-0.01° phase error at 50Hz for synchronized multi-channel measurements |
| Reference | 4.096V internal reference (±5ppm/°C) - eliminates external reference component and layout complexity |
| Supply Range | AVDD: 4.75–5.25V; DVDD: 2.7–5.25V - permits direct interfacing with 3.3V or 5V logic without level shifters |
Pinout & Package
MAX11044BETN+T is housed in a 56-pin TQFN-EP (8mm × 8mm) package with exposed thermal pad internally connected to AGND. Pin functions are defined per the MAX11044/MAX11044B TQFN pinout table below.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–6, 9–16, 55–56 | DB13–DB0 / DB15–DB14 | 16-bit parallel data bus - outputs conversion results or accepts configuration bits (DB0–DB3 double as CR0–CR3) |
| 17 | EOC | Active-low end-of-conversion flag - synchronizes host read timing without polling overhead |
| 18 | CONVST | Rising-edge-triggered sample-start - initiates simultaneous acquisition across all 4 channels |
| 19 | SHDN | Hardware shutdown control - reduces total current to 10μA while preserving register state |
| 32, 34, 37, 39 | CH0–CH3 | Analog input terminals - each with ±20mA clamp protection and 15pF input capacitance |
| 22, 28, 35, 43, 49 | RDC | Reference decoupling node - requires ≥80μF total capacitance to AGND for stable 4.096V reference |
| 23, 27, 33, 38, 44, 48 | AGNDS | Signal ground reference - must be tied to AGND on PCB to minimize offset drift and crosstalk |
| 24, 30, 41, 47 | AVDD | Analog supply input - requires local 0.1μF bypass per pin to suppress switching noise coupling into ADC core |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling | Four independent track-and-hold circuits eliminate inter-channel skew, enabling accurate phase-angle measurement in 3-phase power systems |
| High-impedance inputs | 1GΩ input impedance minimizes loading on precision signal conditioning stages and passive filters |
| Fast conversion time | 3μs conversion latency allows tight control-loop timing in real-time motor drives |
| Internal reference accuracy | ±0.4LSB INL and ±0.015%FSR gain error ensure calibrated measurements without factory trimming |
| Overrange protection | ±20mA input clamps with external resistor limit allow safe operation during transient surges up to ±7.5V |
| Flexible digital interface | Bidirectional 16-bit parallel bus supports both read (RD) and write (WR) operations with CS/CONVST/EOC handshaking |
Applications
| Power-Grid Protection | Multiphase Motor Control |
|---|---|
|
Use Scenario: Real-time monitoring of voltage and current waveforms across three phases plus neutral in substation relay systems. IC Role / Device Role / Timing Role: Simultaneous 4-channel sampling captures synchronized voltage/current snapshots for fault detection algorithms. Use Value: 100ps channel-to-channel T/H matching ensures <0.01° phase error at 50Hz, critical for directional overcurrent and distance protection. |
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase PMSM/induction motors using current feedback from shunt resistors. IC Role / Device Role / Timing Role: Simultaneous sampling of two phase currents and DC-link voltage enables precise torque and flux estimation. Use Value: 250ksps per channel supports >10kHz PWM carrier frequencies with sufficient samples per switching cycle for observer-based control. |
| Vibration Analysis | Automatic Test Equipment |
|
Use Scenario: Multi-sensor acquisition of acceleration, velocity, and temperature in rotating machinery health monitoring systems. IC Role / Device Role / Timing Role: Simultaneous sampling across 4 analog inputs preserves phase coherence between vibration modes. Use Value: 92.3dB SNR and 92dB SINAD enable detection of low-amplitude harmonics (<–80dB) buried in broadband noise. |
Use Scenario: High-speed parametric testing of analog components (op-amps, filters, sensors) requiring correlated multi-channel stimulus/response capture. IC Role / Device Role / Timing Role: Synchronized digitization of DUT output and reference signals under programmable test conditions. Use Value: Internal clock and 3μs conversion time reduce system timing jitter, improving test repeatability and measurement throughput. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11044ETN+ | A-grade variant with ±0.4LSB INL (vs. B-grade ±3LSB); identical pinout, package, and timing | Better linearity for metrology-grade calibration; same thermal and layout requirements | Select MAX11044ETN+ when absolute accuracy dominates over cost; MAX11044BETN+T suits industrial control where matched channel performance is prioritized |
| AD7606C-24 | 8-channel, 24-bit, 1MSPS, but uses serial SPI interface and requires external reference; no internal ±20mA clamps | Higher resolution and channel count, but demands more complex digital interface and external protection circuitry | Choose AD7606C-24 for ultra-high-resolution applications needing >16-bit ENOB; MAX11044BETN+T offers simpler parallel interface and integrated protection for rugged industrial environments |
Compared with MAX11044ETN+, the MAX11044BETN+T trades minor INL degradation for tighter channel matching and lower cost-ideal for phase-coherent applications like motor control. Against AD7606C-24, it sacrifices resolution and channel count for plug-and-play parallel interfacing, built-in clamping, and reduced BOM count.
Availability
MAX11044BETN+T is available at Aetrix Electronics and suitable for power-grid protection, multiphase motor control, and vibration analysis systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX11044BETN+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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications.
The MAX11044 family targets precision data acquisition in electric utility, motor drive, and test equipment markets-emphasizing simultaneous sampling, robust input protection, and simplified system integration.
FAQ
What is the maximum sampling rate per channel for the MAX11044BETN+T?
The MAX11044BETN+T achieves 250ksps per channel with simultaneous sampling across all four inputs. This rate is guaranteed over the full –40°C to +85°C operating temperature range and with internal reference enabled. Conversion time remains fixed at 3μs regardless of input frequency or supply voltage variation.
Does the MAX11044BETN+T require an external reference voltage?
No-the MAX11044BETN+T includes a precision 4.096V internal reference with ±5ppm/°C temperature coefficient, supporting ±5V full-scale input range without external components. An external reference (3.0V–4.25V) may be used via REFIO pin for custom scaling, but is not required for standard operation.
How does the MAX11044BETN+T handle overvoltage conditions on its analog inputs?
The MAX11044BETN+T integrates ±20mA input clamps on each CH0–CH3 pin. When paired with an external series resistor (e.g., 250Ω), these clamps safely limit input current during transients up to ±7.5V, protecting the internal SAR core without external TVS diodes or op-amp saturation recovery delays.
Can the MAX11044BETN+T interface directly with a 3.3V microcontroller?
Yes-the MAX11044BETN+T supports DVDD from 2.7V to 5.25V, allowing direct connection to 3.3V logic. Its parallel interface outputs (DB0–DB15, EOC) meet 3.3V VOH/VOL specs, and inputs (RD, WR, CS, CONVST) accept 3.3V-compatible VIH/VIL thresholds, eliminating level-shifter components.
What is the purpose of the RDC pins on the MAX11044BETN+T?
The RDC pins (pins 22, 28, 35, 43, 49) connect to the internal reference buffer's decoupling node. They must be tied together and bypassed to AGND with ≥80μF total capacitance (e.g., four 33μF tantalum caps) to stabilize the 4.096V reference under dynamic load, preventing gain drift and increased THD during high-throughput operation.
MAX11044BETN+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 56-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
MAX11044BETN+T FAQ
1.How can I place an order for MAX11044BETN+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11044BETN+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 MAX11044BETN+T reliable?
The price and inventory of MAX11044BETN+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11044BETN+T is usually 5 days.
3.What payment methods are accepted for MAX11044BETN+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11044BETN+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11044BETN+T?
MAX11044BETN+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11044BETN+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 MAX11044BETN+T?
For technical support, including MAX11044BETN+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11044BETN+T requirements.
6.How does Aetrix verify that MAX11044BETN+T is sourced from the original manufacturer or authorized distributors?
All MAX11044BETN+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 MAX11044BETN+T meets industry standards.
7.What is the process for return or replacement of MAX11044BETN+T?
All MAX11044BETN+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11044BETN+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 MAX11044BETN+T part is unused and in its original packaging.
Return procedure for MAX11044BETN+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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