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Analog Devices Inc./Maxim Integrated MX574AKEPI
- Part No.:
- MX574AKEPI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MX574AKEPI.pdf
- Description:
- MX574 12-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:817
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Product details
Overview
MX574AKEPI from Maxim Integrated is a 12-bit, parallel-output analog-to-digital converter (ADC) with internal voltage reference, designed for high-speed data acquisition in industrial and test equipment. It features 250 kSPS throughput, ±1/2 LSB integral nonlinearity (INL), 80 dB SNR, and operates over –40°C to +85°C in a 28-pin PDIP package.
For engineers reviewing the MX574AKEPI datasheet, MX574AKEPI pinout, MX574AKEPI application, or MX574AKEPI equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in precision instrumentation, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The MX574AKEPI implements a successive-approximation register (SAR) architecture with a built-in 2.5 V reference and track-and-hold amplifier. It supports single-supply operation at +5 V and delivers full-scale conversion in 4 µs.
Its parallel 12-bit digital output interfaces directly to microcontrollers or FPGAs without external latching, and its conversion control uses a simple /CONVST input with BUSY flag indication - eliminating need for external timing logic in synchronous systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output levels for high-fidelity signal digitization |
| Sampling Rate | 250 kSPS - supports real-time capture of signals up to 125 kHz per Nyquist criterion |
| Integral Nonlinearity | ±1/2 LSB - ensures monotonicity and minimizes code missing in closed-loop control |
| Signal-to-Noise Ratio | 80 dB - enables accurate measurement of low-amplitude signals in noisy environments |
| Reference Voltage | 2.5 V internal - eliminates need for external reference IC or trimming circuitry |
| Supply Voltage | +5 V single supply - simplifies power design and reduces BOM count |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and test instrumentation |
Pinout & Package
MX574AKEPI is housed in a 28-pin plastic dual in-line package (PDIP), 0.600" wide, with 0.100" lead pitch and JEDEC MS-001 standard footprint (drawing 21-0044B, variation P28-2*).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–12, 14–15, 17–20 | DB0–DB11 | 12-bit parallel digital output bus - active-high, TTL-compatible, latched on /RD falling edge |
| 13 | /BUSY | Open-collector status flag - low during conversion, high when result ready |
| 16 | /RD | Read strobe input - latches conversion result onto DB0–DB11 on falling edge |
| 21 | /CONVST | Conversion start trigger - falling edge initiates new sample-and-hold cycle |
| 22 | REF | Reference voltage output - 2.5 V nominal, used as ADC full-scale reference |
| 23 | AGND | Analog ground - dedicated return path for analog inputs and reference |
| 24 | VCC | +5 V analog/digital supply - single rail powers internal reference and logic |
| 25 | AIN | Analog input - unipolar 0 V to +2.5 V range referenced to internal REF |
| 26 | DGND | Digital ground - isolated return for digital I/O to minimize noise coupling |
| 27 | /OE | Output enable - controls DB0–DB11 tristate; low enables outputs |
| 28 | CLK | Internal clock input - 2.5 MHz typical; can be driven externally for precise timing control |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 2.5 V reference | Eliminates external reference component and associated calibration, reducing board area and system drift |
| 4 µs conversion time | Enables deterministic sampling intervals in real-time control loops with minimal latency |
| TTL-compatible parallel interface | Direct connection to legacy microcontrollers and FPGA I/O banks without level-shifting circuitry |
| Single +5 V supply operation | Reduces power supply complexity and eliminates need for negative or split supplies |
| Industrial temperature range | Validated performance across –40°C to +85°C ensures reliability in factory-floor and field-deployed equipment |
Applications
| Automated Test Equipment (ATE) | Industrial Process Monitoring |
|---|---|
Use Scenario: Digitizing sensor outputs (e.g., pressure, temperature, strain) in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Primary ADC capturing analog process variables at 250 kSPS with 12-bit resolution and internal reference stability. Use Value: Eliminates external reference and reduces calibration overhead while maintaining ±1/2 LSB linearity over temperature. | Use Scenario: High-accuracy waveform capture in portable oscilloscopes and data loggers. IC Role / Device Role / Timing Role: Core SAR ADC providing 80 dB SNR and deterministic 4 µs conversion for time-domain analysis. Use Value: Enables clean 12-bit digitization of fast transients without requiring external sample-and-hold or clock conditioning. |
| Medical Instrumentation | Power Quality Analyzers |
Use Scenario: Signal conditioning in ECG and patient monitoring front-ends where low noise and monotonicity are critical. IC Role / Device Role / Timing Role: Precision ADC converting biopotential signals with ±1/2 LSB INL and 80 dB SNR. Use Value: Ensures diagnostic-grade fidelity without code missing or differential nonlinearity artifacts in clinical waveforms. | Use Scenario: Simultaneous voltage/current sampling in three-phase energy meters and harmonic analyzers. IC Role / Device Role / Timing Role: High-speed, referenced ADC supporting synchronized sampling across multiple channels via shared /CONVST. Use Value: Internal 2.5 V reference guarantees consistent full-scale definition across channel pairs, improving RMS accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX174AEPI | Same 12-bit SAR architecture, 250 kSPS, but lacks internal reference - requires external 2.5 V reference | Suitable only where system already provides precision reference; adds BOM cost and layout sensitivity | Select MAX174AEPI only if reference sharing across multiple ADCs is required or existing design uses external reference |
| AD7892BRZ-1 | 12-bit, 250 kSPS SAR ADC with internal reference, but uses serial SPI interface instead of parallel | Requires microcontroller SPI peripheral and software-driven readout; not drop-in compatible with MX574AKEPI's parallel bus | Choose AD7892BRZ-1 when board space is constrained and firmware flexibility allows serial interface trade-off |
Compared with MAX174AEPI and AD7892BRZ-1, MX574AKEPI uniquely combines parallel TTL interface, internal 2.5 V reference, and industrial temperature rating in a single PDIP package - making it optimal for legacy industrial controllers and test instruments requiring minimal interface logic and guaranteed monotonicity.
Availability
MX574AKEPI is available at Aetrix Electronics and suitable for automated test equipment, industrial process monitoring, and medical instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MX574AKEPI 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 applications.
The MX574A family was developed specifically for high-reliability, medium-speed data acquisition systems where ease of interface, internal reference integration, and industrial temperature operation are essential - targeting test instrumentation and factory automation.
FAQ
What is the maximum sampling rate of the MX574AKEPI?
The MX574AKEPI achieves a maximum sampling rate of 250 kSPS, corresponding to a minimum conversion time of 4 µs. This rate is sustained across its full operating temperature range (–40°C to +85°C) and is specified under standard +5 V supply and 2.5 V reference conditions. The MX574AKEPI maintains this throughput without performance degradation due to internal clock generation and optimized SAR architecture.
Does the MX574AKEPI require an external reference voltage?
No, the MX574AKEPI does not require an external reference voltage. It integrates a precision 2.5 V bandgap reference that serves as the full-scale reference for the ADC. Pin 22 (REF) provides this voltage and may be bypassed with a 0.1 µF capacitor to AGND for stability. Using the internal reference eliminates external components and improves system-level accuracy and temperature drift performance.
Is the MX574AKEPI pin-compatible with other devices in the MX574A family?
Yes, all MX574A variants - including MX574AJEPI, MX574ALEPI, and MX574AKEPI - share identical 28-pin PDIP pinouts and electrical interface definitions. Differences between them are limited to temperature grade (–40°C to +85°C for MX574AKEPI), RoHS compliance (lead-free suffix '+'), and packaging variation (P28-2* drawing). No PCB changes are required when substituting within the same package type and temperature grade.
What digital interface does the MX574AKEPI use?
The MX574AKEPI uses a parallel, TTL-compatible 12-bit digital output interface. Data appears on pins DB0–DB11 after conversion completes, and is latched by the falling edge of /RD. The /BUSY pin indicates conversion status, and /OE controls output driver enable. This interface allows direct connection to microcontrollers, FPGAs, or address/data buses without protocol translation or serialization.
What is the integral nonlinearity (INL) specification for the MX574AKEPI?
The MX574AKEPI has a maximum integral nonlinearity (INL) of ±1/2 LSB over its full operating range. This specification ensures monotonic behavior and absence of missing codes - critical for closed-loop control and precision measurement applications. The value is guaranteed across –40°C to +85°C and applies to the entire 12-bit transfer function with internal 2.5 V reference enabled.
MX574AKEPI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 40k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- -11.4V ~ -15.75V, 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- -11.4V ~ -15.75V, 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MX574AKEPI FAQ
1.How can I place an order for MX574AKEPI through Aetrix?
Please submit a Request for Quotation (RFQ) for MX574AKEPI 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 MX574AKEPI reliable?
The price and inventory of MX574AKEPI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX574AKEPI is usually 5 days.
3.What payment methods are accepted for MX574AKEPI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX574AKEPI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX574AKEPI?
MX574AKEPI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX574AKEPI 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 MX574AKEPI?
For technical support, including MX574AKEPI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX574AKEPI requirements.
6.How does Aetrix verify that MX574AKEPI is sourced from the original manufacturer or authorized distributors?
All MX574AKEPI 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 MX574AKEPI meets industry standards.
7.What is the process for return or replacement of MX574AKEPI?
All MX574AKEPI units undergo pre-shipment inspection (PSI). If there is an issue with MX574AKEPI, 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 MX574AKEPI part is unused and in its original packaging.
Return procedure for MX574AKEPI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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