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Analog Devices Inc./Maxim Integrated MX574ALEPI
- Part No.:
- MX574ALEPI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MX574ALEPI.pdf
- Description:
- MX574 12-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:4,669
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Product details
Overview
MX574ALEPI from Maxim Integrated is a 12-bit, successive-approximation analog-to-digital converter (ADC) with internal voltage reference, designed for precision data acquisition in industrial and instrumentation systems. It delivers 100 kSPS throughput, ±1/2 LSB integral nonlinearity (INL), and operates over –40°C to +85°C with ±5 V analog supply and +5 V digital supply.
For engineers reviewing the MX574ALEPI datasheet, MX574ALEPI pinout, MX574ALEPI application, or MX574ALEPI equivalent, this device serves as an industry-standard replacement for AD574A-compatible systems requiring stable DC accuracy, low power consumption, and minimal external components in embedded control and test equipment.
Technical Context
The MX574ALEPI implements a fully integrated 12-bit SAR architecture with on-chip 10 V reference, track/hold amplifier, and three-state data bus interface. It supports both 12-bit parallel output and 8-bit byte-mode readback via CE, R/C̅, and RD̅ control signals.
Its conversion cycle is self-timed and requires no external clock; completion is signaled by the BUSY output going low. The device features differential analog inputs (IN+ and IN–), unipolar/bipolar input range selection via RANGE pin, and TTL/CMOS-compatible digital I/O.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 part in 4096 quantization granularity for high-fidelity signal digitization. |
| Sampling Rate | 100 kSPS - supports real-time capture of signals up to ~40 kHz without aliasing under Nyquist criterion. |
| Integral Nonlinearity | ±1/2 LSB - ensures monotonicity and <0.012% full-scale error for calibration-critical measurements. |
| Reference Voltage | Internal 10 V - eliminates need for external reference IC or trimming, reducing BOM and layout complexity. |
| Supply Voltages | ±5 V analog, +5 V digital - compatible with standard dual-rail op-amp signal chains and 5 V logic systems. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and motor control cabinets. |
| Power Dissipation | 120 mW typical - enables use in thermally constrained enclosures without forced cooling. |
Pinout & Package
MX574ALEPI is housed in a 28-pin plastic DIP (PDIP) package with 0.600-inch width, footprint per drawing 21-0044B, pkgcode P28-2*, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 | Data Output (D0–D11), Status (DB12, DB13) | 12-bit parallel data bus + two status bits; outputs valid after BUSY goes low; TTL/CMOS compatible. |
| 15 | CE (Chip Enable) | Active-high enable for data bus; must be high during conversion and read cycles to avoid bus contention. |
| 16 | R/C̅ (Read/Convert) | Low pulse initiates conversion; high enables data readback - controls mode transition without external timing logic. |
| 17 | RD̅ (Read) | Active-low strobe to latch conversion result onto data bus; synchronizes host microcontroller read timing. |
| 18 | BUSY | Open-collector output active high during conversion; signals host when result is ready for read. |
| 19 | IN+ | Noninverting analog input - accepts single-ended or differential signals depending on RANGE and IN– configuration. |
| 20 | IN– | Inverting analog input - used with IN+ for differential mode or grounded for single-ended unipolar operation. |
| 21 | RANGE | Logic input selecting input range: high = ±10 V bipolar, low = 0 to +10 V unipolar - configures internal scaling network. |
| 22 | REF OUT | 10 V reference output - can drive external circuitry or serve as precision gain-setting node for front-end amplifiers. |
| 23 | VCC | +5 V digital supply - powers logic interface and internal control circuitry; decoupling required near pin. |
| 24 | GND | Analog ground - dedicated return path for reference and analog input circuitry; must be star-connected to minimize noise coupling. |
| 25 | VEE | –5 V analog supply - powers internal comparator and track/hold; critical for maintaining linearity at full scale. |
| 26 | VCC | +5 V analog supply - powers internal reference and analog front-end; separate from digital VCC for PSRR improvement. |
| 27 | CLK | No-connect - internal clock generator eliminates need for external crystal or oscillator component. |
| 28 | AGND | Analog ground - isolated ground pin for analog section; must be tied to system analog ground at single point. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 10 V reference | Eliminates external reference IC, reduces calibration drift, and simplifies layout for metrology-grade accuracy. |
| Self-timed conversion | Removes dependency on external clock source or timing controller, enabling direct interfacing with microcontrollers lacking precise timing peripherals. |
| Dual-supply analog section (±5 V) | Supports true bipolar input ranges and maintains linearity across full dynamic range without rail-to-rail limitations. |
| Three-state parallel output bus | Allows direct connection to 8-bit or 16-bit microprocessor data buses without glue logic or bus transceivers. |
| Byte-mode read capability | Enables 8-bit microcontrollers to read 12-bit result in two consecutive cycles, preserving firmware compatibility with legacy AD574A designs. |
| Industrial temperature grade (–40°C to +85°C) | Validated for continuous operation in harsh environments such as PLC I/O modules and motor drive feedback circuits. |
Applications
| Programmable Logic Controller (PLC) Analog Input Module | Industrial Data Logger |
|---|---|
Use Scenario: Digitizing 4–20 mA current loop signals and ±10 V sensor outputs from pressure, temperature, and flow transmitters. IC Role / Device Role / Timing Role: Primary ADC performing high-accuracy, low-drift conversion with integrated reference and bipolar support. Use Value: Reduces external component count by eliminating discrete reference and level-shifting circuitry while maintaining ±1/2 LSB INL over temperature. |
Use Scenario: Capturing slow-varying environmental parameters (e.g., soil moisture, ambient humidity) over extended periods using battery-powered nodes. IC Role / Device Role / Timing Role: Low-power, self-timed ADC minimizing CPU wake-up frequency and system-level energy consumption. Use Value: 120 mW typical dissipation and no external clock requirement extend battery life and simplify power management design. |
| Automated Test Equipment (ATE) Front-End | Motor Drive Current Sensing Interface |
Use Scenario: High-repeatability voltage measurement in benchtop multimeters and calibration standards where traceability and linearity are critical. IC Role / Device Role / Timing Role: Precision ADC with guaranteed ±1/2 LSB INL and monotonic transfer function for metrological confidence. Use Value: Internal 10 V reference stability (±25 ppm/°C) and low thermal hysteresis ensure measurement repeatability across thermal cycles. |
Use Scenario: Sampling shunt-based phase current feedback in three-phase inverters for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Fast 100 kSPS ADC capturing transient current peaks during commutation events with minimal latency. Use Value: BUSY signal provides deterministic timing for interrupt-driven sampling, enabling tight synchronization with PWM dead-time intervals. |
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 |
|---|---|---|---|
| AD574AJPZ-REEL | Same 12-bit SAR architecture, but requires external 10 V reference and external clock; ±1/2 LSB INL spec identical. | Higher BOM cost and board area due to external reference and timing components; less suitable for space-constrained designs. | Select when legacy AD574A footprint compatibility is mandatory and external reference already exists in system. |
| MAX1167BCAP+ | 16-bit SAR ADC with internal reference, 250 kSPS, SPI interface, and 3.3 V operation - no pin compatibility. | Higher resolution and serial interface reduce wiring complexity but require firmware redesign and level-shifting for 5 V systems. | Select when resolution >12-bit is required and system supports SPI communication and lower supply voltages. |
Compared with AD574AJPZ-REEL, MX574ALEPI reduces external component count and simplifies timing; compared with MAX1167BCAP+, it retains parallel bus compatibility and 5 V operation but trades resolution for drop-in replaceability in legacy industrial hardware.
Availability
MX574ALEPI is available at Aetrix Electronics and suitable for industrial automation, test equipment, and motor control applications requiring stable component supply, long-term obsolescence mitigation, and RoHS-compliant manufacturing.
Supply support for MX574ALEPI 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MX574A family was developed to provide pin- and function-compatible upgrades to the AD574A, targeting industrial data acquisition systems needing integrated reference, simplified timing, and extended temperature operation.
FAQ
What is the maximum sampling rate of the MX574ALEPI?
The MX574ALEPI achieves a maximum sampling rate of 100 kSPS. This rate is internally determined by its self-timed conversion architecture and remains consistent across the full operating temperature range (–40°C to +85°C) and supply conditions. Each conversion completes in ≤10 µs, and the BUSY signal transitions low to indicate result readiness for readback.
Does the MX574ALEPI require an external clock source?
No, the MX574ALEPI does not require an external clock source. It contains a fully integrated timing generator that autonomously controls conversion initiation, sampling, and hold release. The only required timing signals are CE, R/C̅, and RD̅ from the host system - all of which are asynchronous and level-sensitive.
Can the MX574ALEPI operate with a single +5 V supply?
No, the MX574ALEPI requires three independent supplies: +5 V for digital logic (VCC), +5 V for analog circuitry (VCC), and –5 V for the analog section (VEE). This dual-polarity analog supply enables true bipolar input operation and maintains specified linearity and offset performance. Operation with only +5 V will result in functional failure.
How is the input range configured on the MX574ALEPI?
The MX574ALEPI uses the RANGE pin (Pin 21) to select input range: logic high configures ±10 V bipolar mode (IN+ to IN–), and logic low configures 0 to +10 V unipolar mode (IN+ referenced to IN–, which must be grounded). This selection determines internal resistor network scaling and affects full-scale code mapping.
Is the MX574ALEPI pin-compatible with the AD574A?
Yes, the MX574ALEPI is functionally and pin-compatible with the AD574A in 28-pin PDIP packages, including identical pin assignments for data bus, control signals (CE, R/C̅, RD̅, BUSY), analog inputs (IN+, IN–), and supplies. However, MX574ALEPI integrates the 10 V reference and eliminates the need for external clock, offering a direct upgrade path without PCB changes.
MX574ALEPI 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:
- -
MX574ALEPI FAQ
1.How can I place an order for MX574ALEPI through Aetrix?
Please submit a Request for Quotation (RFQ) for MX574ALEPI 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 MX574ALEPI reliable?
The price and inventory of MX574ALEPI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX574ALEPI is usually 5 days.
3.What payment methods are accepted for MX574ALEPI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX574ALEPI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX574ALEPI?
MX574ALEPI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX574ALEPI 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 MX574ALEPI?
For technical support, including MX574ALEPI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX574ALEPI requirements.
6.How does Aetrix verify that MX574ALEPI is sourced from the original manufacturer or authorized distributors?
All MX574ALEPI 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 MX574ALEPI meets industry standards.
7.What is the process for return or replacement of MX574ALEPI?
All MX574ALEPI units undergo pre-shipment inspection (PSI). If there is an issue with MX574ALEPI, 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 MX574ALEPI part is unused and in its original packaging.
Return procedure for MX574ALEPI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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