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Analog Devices Inc./Maxim Integrated MAX11045ETN+
- Part No.:
- MAX11045ETN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 56-WFQFN Exposed Pad
- Datasheet:
-
MAX11045ETN+.pdf
- Description:
- IC ADC 16BIT SAR 56TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,701
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Product details
Overview
MAX11045ETN+ from Maxim Integrated is a 6-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 across –40°C to +85°C for precision power-grid protection and multiphase motor control.
For engineers reviewing the MAX11045ETN+ datasheet, MAX11045ETN+ pinout, MAX11045ETN+ application, or MAX11045ETN+ equivalent, this page provides verified electrical specifications, functional pin definitions, real-world use cases in synchronized acquisition systems, and validated alternative parts for design continuity and supply resilience.
Technical Context
The MAX11045ETN+ implements SAR architecture with dedicated track-and-hold circuitry per input channel, enabling true simultaneous sampling without inter-channel skew. Its internal 4.096V reference supports ±5V full-scale input, 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 control signals. Conversion is initiated by CONVST rising edge, with EOC signaling completion; aperture delay is fixed at 10ns and matched to ±100ps across all six channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - Provides 65,536 distinct output codes for high-fidelity waveform capture in vibration analysis and power quality monitoring. |
| Sampling Rate | 250ksps per channel - Enables real-time capture of 50/60Hz harmonics up to 40th order with oversampling margin. |
| Input Range | ±5V - Matches standard industrial sensor outputs and isolation amplifier interfaces without external scaling. |
| SNR | 92.3dB (typ) - Delivers >15 effective bits (ENOB ≈ 15.1) at 10kHz input, critical for accurate RMS and THD calculations. |
| Channel Matching | ±0.01% FSR gain error matching - Ensures consistent amplitude response across all 6 channels in multiphase current/voltage measurement. |
| Supply Voltages | AVDD = 4.75–5.25V; DVDD = 2.7–5.25V - Allows direct interfacing with 3.3V or 5V host processors without level shifters. |
| Operating Temp | –40°C to +85°C - Qualified for deployment in outdoor substations, factory-floor motor drives, and industrial ATE environments. |
Pinout & Package
MAX11045ETN+ is housed in a 56-pin, 8mm × 8mm TQFN-EP package with exposed pad thermally connected to AGND. Pin functions are defined per the MAX11045-specific TQFN configuration (not shared with MAX11044 or MAX11046).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH5 | Analog Input Channels | Six independent ±5V differential-capable inputs with internal ±20mA clamps; each has dedicated track-and-hold. |
| DB0–DB15 | Parallel Data Bus | 16-bit bidirectional bus: outputs conversion results (MSB-first), accepts configuration register writes via CR0–CR3. |
| CONVST | Conversion Start | Rising-edge-triggered; initiates simultaneous sample-and-hold across all six channels and starts conversion sequence. |
| EOC | End-of-Conversion | Active-low open-drain signal indicating data validity on DBx bus; used for interrupt-driven host read timing. |
| RDC | Reference Decoupling | Must be tied together and bypassed to AGND with ≥80μF total capacitance to stabilize internal reference buffer. |
| REFIO | Reference I/O | Outputs 4.096V internal reference; accepts external 3.0–4.25V reference when externally driven. |
| SHDN | Shutdown Control | Active-high; reduces total supply current to ≤10μA while preserving configuration register contents. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sampling | True concurrent acquisition across all 6 channels with 100ps T/H matching-eliminates phase-induced errors in vector measurements. |
| High-Z Inputs | ≥1GΩ input impedance minimizes loading on high-impedance sensors and voltage dividers in metering applications. |
| Overrange Protection | Internal ±20mA clamps on each CHx pin enable robust operation with simple series resistor-no external TVS required. |
| Flexible Reference | Switchable between precision 4.096V internal reference (±5ppm/°C) and user-supplied 3.0–4.25V external source for system-level calibration. |
| Low Aperture Jitter | 50ps RMS jitter ensures <0.001% SNR degradation at 10kHz-critical for high-resolution spectral analysis. |
Applications
| Power-Grid Protection | Multiphase Motor Control |
|---|---|
|
Use Scenario: Real-time monitoring of three-phase voltage and current waveforms in digital relays and fault recorders. IC Role / Device Role / Timing Role: Simultaneous 6-channel acquisition captures synchronized voltage/current samples for sequence component calculation and harmonic distortion analysis. Use Value: 100ps channel matching enables sub-degree phase angle accuracy; ±5V input directly interfaces with CT/VT signal conditioning stages. |
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase PMSM/induction motors using dual current sensing per phase. IC Role / Device Role / Timing Role: Simultaneous sampling of all six current/voltage feedback signals eliminates cross-phase timing skew in torque estimation. Use Value: 250ksps per channel supports >10kHz PWM carrier synchronization; 92.3dB SNR ensures precise current ripple detection. |
| Vibration Analysis | Automatic Test Equipment |
|
Use Scenario: Multi-sensor acquisition in predictive maintenance systems measuring bearing vibration across rotating equipment. IC Role / Device Role / Timing Role: Simultaneous capture of accelerometer outputs from orthogonal axes for FFT-based frequency-domain diagnostics. Use Value: 16-bit resolution and 92.3dB SNR resolve low-amplitude harmonics (<–100dB) buried in noise floor; ±5V range accommodates MEMS and piezoelectric sensors. |
Use Scenario: High-speed parametric testing of analog components requiring synchronized multi-point voltage/current measurements. IC Role / Device Role / Timing Role: Parallel 6-channel digitization of DUT stimulus and response signals under programmable timing control. Use Value: 20MHz parallel interface enables burst-mode data transfer at >3MB/s; internal clock eliminates external timing generator dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11045ECB+ | Same 6-channel, 16-bit performance but in 64-pin TQFP-EP package (10mm × 10mm); higher thermal resistance (43.5mW/°C derating above +70°C). | Better PCB routing flexibility for dense layouts; less suitable for space-constrained designs where 8mm × 8mm TQFN is preferred. | Select MAX11045ECB+ when board layout requires larger pitch or improved heat dissipation via extended copper pour on top layer. |
| AD7656ASTZ | 6-channel, 16-bit SAR ADC with 250ksps/channel, but uses serial SPI interface (not parallel), lacks internal reference, and requires external ±5V reference for same input range. | Lower pin count (64LQFP vs. 56TQFN), but demands additional reference IC and FPGA/microcontroller SPI handling overhead. | Choose AD7656ASTZ only if system already uses SPI infrastructure and external reference is available; not drop-in compatible due to interface and reference architecture differences. |
Compared with MAX11045ETN+, MAX11045ECB+ offers identical electrical performance in a larger, more routable package, while AD7656ASTZ trades parallel simplicity for serial interface flexibility-requiring redesign of both hardware interface and firmware data capture logic.
Availability
MAX11045ETN+ is available at Aetrix Electronics and suitable for power-grid protection, multiphase motor control, and vibration analysis applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX11045ETN+ 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, integration, and reliability.
The MAX11045ETN+ belongs to Maxim's simultaneous-sampling ADC family targeting high-accuracy, multi-channel data acquisition in electric utility, motor drive, and test instrumentation systems.
FAQ
What is the maximum sampling rate per channel for the MAX11045ETN+?
The MAX11045ETN+ achieves 250ksps (kilo-samples per second) per channel with true simultaneous sampling across all six analog inputs. This rate is maintained over the full –40°C to +85°C operating temperature range and does not degrade with channel count, as each channel has its own dedicated track-and-hold and SAR circuitry.
Does the MAX11045ETN+ require an external reference voltage?
No-the MAX11045ETN+ includes a low-drift, accurate 4.096V internal reference that supports ±5V input range operation. However, it also accepts an external reference voltage from 3.0V to 4.25V on the REFIO pin, enabling system-level calibration or custom full-scale ranges (±4.0V to ±5.2V) when needed.
How is channel-to-channel timing skew managed in the MAX11045ETN+?
The MAX11045ETN+ guarantees 100ps maximum channel-to-channel track-and-hold matching, achieved through matched on-chip capacitor arrays and low-jitter internal clock distribution. This specification is tested and guaranteed over temperature and supply voltage, ensuring phase coherence essential for vector math and power quality calculations.
What are the power supply requirements for the MAX11045ETN+?
The MAX11045ETN+ requires two supplies: AVDD = 4.75V to 5.25V (analog) and DVDD = 2.7V to 5.25V (digital). At VAVDD = 5V and VDVDD = 3.3V, typical analog supply current is 39mA and digital supply current is 6.5mA during conversion. Shutdown current drops to ≤10μA with SHDN high.
Can the MAX11045ETN+ interface directly with a 3.3V microcontroller?
Yes-the MAX11045ETN+ supports DVDD down to 2.7V, allowing direct connection to 3.3V logic without level shifters. Its digital I/Os (RD, WR, CS, DB0–DB15) meet 3.3V-compatible voltage thresholds: VIH ≥ 2.0V and VIL ≤ 0.8V, with VOH ≥ DVDD – 0.4V and VOL ≤ 0.4V at specified load conditions.
MAX11045ETN+ 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:
- 6
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 6
- 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:
- -
MAX11045ETN+ FAQ
1.How can I place an order for MAX11045ETN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11045ETN+ 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 MAX11045ETN+ reliable?
The price and inventory of MAX11045ETN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11045ETN+ is usually 5 days.
3.What payment methods are accepted for MAX11045ETN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11045ETN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11045ETN+?
MAX11045ETN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11045ETN+ 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 MAX11045ETN+?
For technical support, including MAX11045ETN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11045ETN+ requirements.
6.How does Aetrix verify that MAX11045ETN+ is sourced from the original manufacturer or authorized distributors?
All MAX11045ETN+ 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 MAX11045ETN+ meets industry standards.
7.What is the process for return or replacement of MAX11045ETN+?
All MAX11045ETN+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11045ETN+, 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 MAX11045ETN+ part is unused and in its original packaging.
Return procedure for MAX11045ETN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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