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Analog Devices Inc./Maxim Integrated MAX1305ECM+T
- Part No.:
- MAX1305ECM+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
MAX1305ECM+T.pdf
- Description:
- IC ADC 12BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,615
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Product details
Overview
MAX1305ECM+T from Maxim Integrated is a 4-channel, 12-bit simultaneous-sampling analog-to-digital converter with 0 to +5V unipolar input range, ±6V fault-tolerant inputs, 0.9μs two-channel conversion time, and 20MHz T/H bandwidth. It operates from +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies, consuming 57mA total supply current, and targets multiphase motor control and power-grid synchronization systems requiring precise phase-aligned acquisition.
For engineers reviewing the MAX1305ECM+T datasheet, MAX1305ECM+T pinout, MAX1305ECM+T application, or MAX1305ECM+T equivalent, this page delivers verified specifications including channel count, fault tolerance, throughput per channel (456ksps at 8-channel mode), internal/external reference support (+2.5V or +2.0V to +3.0V), and LQFP-48 package compatibility for industrial signal acquisition designs.
Technical Context
The MAX1305ECM+T integrates independent track-and-hold circuitry per channel to enable true simultaneous sampling across all four analog inputs, with 100ps channel-to-channel T/H match and 8ns aperture delay. Its architecture supports both internal clock (15MHz) and external clock (up to 20MHz) operation, delivering deterministic timing for synchronized multi-sensor data capture.
It features a 12-bit parallel interface (D0–D11) with active-low RD/WR/CS controls, EOC/EOLC status outputs, and configurable reference topology-supporting either internal +2.5V reference or external +2.0V to +3.0V reference via REF/REFMS pins-while maintaining ±1 LSB INL and 71dB SINAD at 500kHz input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity waveform digitization in motor phase current sensing. |
| Input Range | 0 to +5V unipolar - matches standard industrial sensor outputs and PLC analog input stages without level-shifting. |
| Channel Count | 4 independent channels - enables concurrent sampling of voltage, current, temperature, and auxiliary signals in compact motor drives. |
| Conversion Time | 0.9μs for two channels - ensures sub-microsecond phase alignment critical for real-time field-oriented control (FOC). |
| Throughput Rate | 456ksps per channel (8-channel mode) - sustains >3.6MSPS aggregate rate for high-speed vibration analysis with oversampling capability. |
| Analog Supply | +4.75V to +5.25V - compatible with standard 5V rail systems and tolerant of industrial power rail variation. |
| Digital Supply | +2.7V to +5.25V - supports direct interfacing with 3.3V or 5V microcontrollers and FPGAs without level translation. |
| INL / DNL | ±1 LSB / ±0.9 LSB max - guarantees monotonicity and accurate amplitude measurement in closed-loop feedback paths. |
Pinout & Package
MAX1305ECM+T is housed in a 48-pin 7mm × 7mm lead(Pb)-free RoHS-compliant LQFP package with exposed thermal pad (EP), optimized for thermal dissipation in high-density industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog Input Channels | Four dedicated unipolar analog inputs (0 to +5V); each fault-tolerant to ±6V for robustness against transients in motor drive environments. |
| AVDD / AGND | Analog Power & Ground | Multiple AVDD (pins 1,15,17) and AGND (pins 2,3,14,16,23) pins reduce ground bounce and improve PSRR in noisy industrial settings. |
| D0–D11 | 12-Bit Parallel Data Bus | Bidirectional 12-bit bus with tri-state outputs; enables fast register readback and channel selection via WR/CS/RD handshaking. |
| EOC / EOLC | Conversion Status Outputs | EOC signals end-of-conversion for any channel; EOLC asserts only after final channel completes-essential for synchronized multi-channel interrupt handling. |
| REF / REFMS | Reference Input/Bypass | Supports internal +2.5V reference or external +2.0V to +3.0V reference; REFMS configures midscale bias for unipolar operation. |
| INTCLK/EXTCLK | Internal/External Clock Select | Logic-level input (tied to AVDD or AGND) selects between internal 15MHz oscillator or external clock up to 20MHz for system-level timing coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sampling | Four independent T/H circuits guarantee phase-coherent acquisition across all channels-critical for vector control accuracy in servo drives. |
| Fault-Tolerant Inputs | ±6V input tolerance on CH0–CH3 protects against inductive kickback and ESD events in motor control I/O stages without external clamping. |
| Internal Reference | +2.5V ±0.025V (2.475V–2.525V) internal reference eliminates need for external precision reference ICs in cost-sensitive industrial modules. |
| Power-Saving Modes | Shutdown current <10µA enables low-power standby during idle cycles in battery-backed or energy-conscious embedded systems. |
| High-Speed Parallel Interface | 20MHz 12-bit bidirectional bus reduces CPU overhead versus SPI/I²C alternatives-ideal for FPGA-based real-time processing pipelines. |
Applications
| SIN/COS Position Encoder | Multiphase Motor Control |
|---|---|
Use Scenario: High-resolution angular position detection using resolver or encoder feedback in servo motors. IC Role / Device Role / Timing Role: Simultaneously samples sine and cosine analog outputs to compute absolute angle with sub-arcminute resolution. Use Value: 100ps channel-to-channel T/H match preserves phase relationship between SIN/COS pairs, enabling <0.01° angle error at 10kHz update rates. | Use Scenario: Real-time acquisition of three-phase voltage and current for field-oriented control (FOC) in inverters. IC Role / Device Role / Timing Role: Captures Va, Vb, Vc, and Ia simultaneously to eliminate sampling skew-induced torque ripple. Use Value: 0.9μs two-channel conversion time allows full 4-sample cycle within <4μs-meeting IEC 61800-3 timing constraints for Class A drives. |
| Multiphase Power Monitoring | Power-Grid Synchronization |
Use Scenario: Continuous monitoring of voltage, current, and neutral current in 3-phase distribution panels. IC Role / Device Role / Timing Role: Digitizes four analog inputs representing line-to-line voltages and neutral current for RMS, THD, and power factor calculation. Use Value: ±1 LSB INL ensures <0.05% measurement error over temperature, meeting ANSI C12.20 Class 0.2 metering accuracy requirements. | Use Scenario: Phase-locked loop (PLL) reference generation for grid-tied inverters and synchrophasor measurement units (PMUs). IC Role / Device Role / Timing Role: Samples grid voltage zero-crossings and harmonic content with deterministic latency for adaptive PLL tuning. Use Value: 8ns aperture delay and 50psRMS jitter minimize phase estimation uncertainty-enabling <10μs timestamp resolution per IEEE C37.118.1a. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7357BCPZ | 2-channel, 14-bit, serial LVDS interface; no internal reference; requires external clock and reference. | Targeted at high-resolution oscilloscope front-ends-not optimized for 4-channel industrial motor control. | Select when higher resolution (14-bit) and lower power (25mW) outweigh need for 4-channel simultaneity and integrated reference. |
| ADS8588HIPMR | 8-channel, 16-bit, parallel interface; ±10V input range; 1.25μs conversion time; no fault tolerance. | Designed for test equipment and high-end DAQ-lacks ±6V fault protection required in motor drive I/O stages. | Choose for ultra-high-precision applications where 16-bit resolution and 8-channel count justify added complexity and cost. |
Compared with AD7357BCPZ and ADS8588HIPMR, the MAX1305ECM+T uniquely balances 4-channel simultaneity, integrated +2.5V reference, ±6V fault tolerance, and 0.9μs conversion-making it optimal for space-constrained industrial motor controllers needing robust, deterministic acquisition without external support components.
Availability
MAX1305ECM+T is available at Aetrix Electronics and suitable for multiphase motor control, power-grid synchronization, and SIN/COS position encoder applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant manufacturing.
Supply support for MAX1305ECM+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 industrial, automotive, and communications markets.
The MAX1304–MAX1314 family was engineered specifically for high-fidelity, phase-coherent data acquisition in demanding industrial automation systems-emphasizing simultaneous sampling, fault tolerance, and seamless integration with real-time control processors.
FAQ
What is the maximum analog input voltage range supported by the MAX1305ECM+T?
The MAX1305ECM+T supports a 0 to +5V unipolar analog input range. Its inputs are fault-tolerant to ±6V relative to AGND, protecting the device from transient overvoltage events common in motor control and industrial I/O environments. This range is fixed for the MAX1305ECM+T variant and cannot be reconfigured for bipolar operation.
Does the MAX1305ECM+T include an internal voltage reference, and what is its accuracy?
Yes, the MAX1305ECM+T includes an internal +2.5V voltage reference with a typical output of 2.500V and a guaranteed range of 2.475V to 2.525V (±1%). Its temperature drift is specified at 30ppm/°C, and it can be bypassed with a ≥0.01µF capacitor on the REF and REFMS pins. External reference operation from +2.0V to +3.0V is also supported.
How many analog input channels does the MAX1305ECM+T have, and are they truly simultaneous?
The MAX1305ECM+T has four independent analog input channels (CH0–CH3). Each channel features its own dedicated track-and-hold circuit, enabling true simultaneous sampling with 100ps channel-to-channel matching and 8ns aperture delay-ensuring phase coherence essential for vector control and power quality analysis.
What package type and pin count does the MAX1305ECM+T use?
The MAX1305ECM+T is supplied in a 48-pin LQFP package measuring 7mm × 7mm with an exposed thermal pad (EP). It is lead(Pb)-free and RoHS-compliant. Pin assignments-including AVDD/AGND distribution, 12-bit parallel bus (D0–D11), and dedicated control signals (EOC, EOLC, CONVST)-are fully documented in the Maxim Integrated datasheet Rev 6.
Can the MAX1305ECM+T operate with both internal and external clock sources?
Yes, the MAX1305ECM+T supports dual clock modes. The INTCLK/EXTCLK pin selects between an internal 15MHz oscillator (when tied to AVDD) or an external clock source (0.1MHz to 20MHz, when tied to AGND). External clock operation provides system-level timing synchronization, while the internal clock simplifies design by eliminating external crystal requirements.
MAX1305ECM+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 680k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 4:1
- Number of A/D Converters:
- 1
- 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:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1305ECM+T FAQ
1.How can I place an order for MAX1305ECM+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1305ECM+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 MAX1305ECM+T reliable?
The price and inventory of MAX1305ECM+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1305ECM+T is usually 5 days.
3.What payment methods are accepted for MAX1305ECM+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1305ECM+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1305ECM+T?
MAX1305ECM+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1305ECM+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 MAX1305ECM+T?
For technical support, including MAX1305ECM+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1305ECM+T requirements.
6.How does Aetrix verify that MAX1305ECM+T is sourced from the original manufacturer or authorized distributors?
All MAX1305ECM+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 MAX1305ECM+T meets industry standards.
7.What is the process for return or replacement of MAX1305ECM+T?
All MAX1305ECM+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1305ECM+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 MAX1305ECM+T part is unused and in its original packaging.
Return procedure for MAX1305ECM+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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