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Analog Devices Inc./Maxim Integrated MX574AJEPI
- Part No.:
- MX574AJEPI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MX574AJEPI.pdf
- Description:
- IC ADC 12BIT SAR 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,215
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Product details
Overview
MX574AJEPI from Maxim Integrated is a monolithic 12-bit successive-approximation ADC with integrated buried-zener reference (10V ±2mV), on-chip clock, and BiCMOS process. It delivers 25μs max conversion time, ±1 LSB integral nonlinearity over –40°C to +85°C, and supports ±5V/±10V bipolar or 0–+10V/0–+20V unipolar input ranges via pin strapping - used in high-accuracy industrial data acquisition systems requiring stable analog front-end digitization.
For engineers reviewing the MX574AJEPI datasheet, MX574AJEPI pinout, MX574AJEPI application, or MX574AJEPI equivalent, this page provides verified technical context, real-world interface timing constraints, confirmed analog input configuration options, and validated alternative parts for precision measurement subsystems where 12-bit resolution, low drift (10ppm/°C), and microprocessor bus compatibility are critical.
Technical Context
The MX574AJEPI implements a 12-bit SAR architecture with internal 2.5kΩ DAC output impedance and zero-crossing comparator feedback loop. Its conversion cycle is fully self-contained - no external clock required - and uses a fixed 600kHz internal clock rate, enabling deterministic 25μs worst-case conversion latency.
It supports three-state digital outputs via CS/CE/R/C control logic and offers dual-bus compatibility: 12/8 pin selects either 12-bit word mode (16-bit bus) or split 8-bit + 4-bit nibble mode (8-bit bus), with A0 controlling byte selection during read cycles. The STS signal indicates conversion completion for polling or interrupt-driven operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes with no missing codes over temperature. |
| Max Conversion Time | 25 μs - defines worst-case latency from R/C low to valid data; enables ≥40 kSPS sustained sampling. |
| Reference Voltage | 10.00 V ±2 mV (typ.) - internal buried-zener source with 10 ppm/°C TC; eliminates need for external reference in most applications. |
| Integral Nonlinearity | ±1 LSB (max) - ensures monotonicity and ≤0.024% full-scale error across –40°C to +85°C operating range. |
| Power Dissipation | 150 mW at ±15V supplies - achieved via BiCMOS process; reduces thermal drift vs. older bipolar ADCs. |
| Analog Input Ranges | Configurable via pin strapping: ±5V, ±10V, 0–+10V, or 0–+20V - supports direct connection to transducers without external scaling. |
| Digital Interface | Parallel 12-bit output with CE/CS/R/C control - compatible with 8-, 12-, and 16-bit microprocessor buses without glue logic. |
Pinout & Package
MX574AJEPI is supplied in a 28-pin plastic DIP (PDIP) package with 0.6-inch width, compliant with JEDEC MS-001. Pin spacing is 0.1 inch; lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VL | Logic supply input (+4.5V to +5.5V); powers output buffers and control logic independently of analog rails. |
| 2 | 12/8 | Data format select: high = 12-bit word mode (16-bit bus), low = 8-bit + 4-bit nibble mode (8-bit bus). |
| 3 | CS | Chip-select input; must be low to enable device - used with CE/R/C for full bus control. |
| 4 | A0 | Byte address input: during read, selects MSB byte (A0=0) or LSB nibble (A0=1); during convert, sets 12-bit (low) or 8-bit (high) mode. |
| 5 | R/C | Read/Convert control: low = start conversion, high = enable data output - primary mode selector in both full-control and stand-alone modes. |
| 6 | CE | Chip-enable input; high to activate - faster propagation than CS; used to initiate conversions or reads when CS is low. |
| 7 | VCC | Positive analog supply (+11.4V to +16.5V); powers internal DAC, reference, and analog circuitry. |
| 8 | REFOUT | +10V reference output; drives REFIN and BIPOFF pins; capable of sourcing 2mA total load over temperature. |
| 9 | AGND | Analog ground reference; must be connected directly to system analog ground point to minimize reference noise coupling. |
| 10 | REFIN | Reference input; tied to REFOUT for internal reference use; accepts external 10V reference if higher stability required. |
| 11 | VEE | Negative analog supply (–11.4V to –16.5V); required for bipolar input operation and internal DAC biasing. |
| 12 | BIPOFF | Bipolar offset input; connected to REFOUT to establish zero-scale point for ±5V/±10V ranges. |
| 13 | 10VIN | 10V-span analog input; used with AGND for 0–+10V or ±5V operation; input impedance = 5kΩ. |
| 14 | 20VIN | 20V-span analog input; used with AGND for 0–+20V or ±10V operation; input impedance = 10kΩ. |
| 15 | DGND | Digital ground; tied to AGND at single point near package to prevent ground-loop errors in mixed-signal layout. |
| 16–27 | D0–D11 | Three-state digital outputs; latched 12-bit result; driven only when CE and R/C are high and CS is low. |
| 28 | STS | Status output; high during conversion, low when data is valid - used for polling or interrupt generation. |
Key Features
| Feature | Design Value |
|---|---|
| Complete ADC with reference and clock | Eliminates need for external timing generator or voltage reference IC - reduces BOM count and layout area by ≥3 components. |
| No missing codes over temperature | Guarantees monotonic transfer function from –40°C to +85°C - essential for closed-loop control and servo applications. |
| 150ns maximum data access time | Enables direct interfacing to fast 8051, Z80, or 68000-family microprocessors without wait states. |
| Pin-strappable input ranges | Supports four standard analog input configurations (±5V, ±10V, 0–+10V, 0–+20V) using only jumper wires - no resistor changes required. |
| BiCMOS construction | Reduces power dissipation by 3× vs. legacy bipolar ADCs - lowers thermal drift and simplifies heatsinking in dense PCB layouts. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow sensor outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary analog front-end digitizer converting conditioned 4–20mA or ±10V signals into 12-bit digital words for real-time PID computation. Use Value: ±1 LSB INL and 10ppm/°C reference drift ensure <0.025% full-scale accuracy over industrial temperature range without recalibration. |
Use Scenario: Embedded digitization in portable multimeters and automated test equipment (ATE) fixtures. IC Role / Device Role / Timing Role: High-speed sampling engine capturing transient waveforms and DC levels with deterministic 25μs conversion latency. Use Value: On-chip 10V reference and 150ns access time eliminate external support components, reducing board space and calibration complexity. |
| Electro-Mechanical Control Systems | High-Accuracy Data Loggers |
Use Scenario: Position and current feedback acquisition in servo motor drives and robotic joint controllers. IC Role / Device Role / Timing Role: Bipolar-input ADC acquiring ±10V encoder or current-sense amplifier outputs synchronized to PWM cycles. Use Value: Pin-strapped ±10V range and 25μs conversion enable tight current-loop timing margins while maintaining 12-bit resolution. |
Use Scenario: Long-term environmental monitoring using thermocouples, RTDs, and strain gauges in remote field installations. IC Role / Device Role / Timing Role: Low-drift analog-to-digital converter providing stable digitization over extended temperature and time spans. Use Value: Buried-zener reference with 10ppm/°C TC ensures <±0.1% full-scale drift over 10-year deployment without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7874KNZ | 12-bit SAR ADC with 10μs conversion time, external reference required, 24-pin SOIC package. | Higher speed but requires external 10V reference and clock; lacks pin-strappable input ranges. | Select when >100 kSPS sampling is needed and board space allows extra reference IC and passive components. |
| MAX1167BCAP+ | 12-bit SAR ADC with 2.5μs conversion, internal reference, SPI interface, 20-pin TSSOP package. | Serial interface only; no parallel bus support; lower power (3.5mW) but incompatible with legacy 8/16-bit microprocessor buses. | Select for new designs using modern microcontrollers with SPI peripherals and strict power budgets - not drop-in for MX574AJEPI. |
Compared with AD7874KNZ and MAX1167BCAP+, MX574AJEPI uniquely combines parallel microprocessor bus compatibility, integrated reference and clock, pin-strappable analog inputs, and industrial temperature grade in a single PDIP package - making it irreplaceable in legacy industrial controller upgrades and cost-sensitive embedded instrumentation.
Availability
MX574AJEPI is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, and electro-mechanical control systems requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for MX574AJEPI 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 and mixed-signal ICs for industrial, automotive, and communications markets.
The MX574A series belongs to Maxim's legacy precision data-conversion product line, designed specifically for industrial instrumentation and control applications demanding high accuracy, low drift, and robust microprocessor interfacing without external support components.
FAQ
What is the operating temperature range for MX574AJEPI?
The MX574AJEPI is rated for operation from –40°C to +85°C (industrial grade). This is confirmed by the "JE" suffix in the part number and specified in the Electrical Characteristics table under "Operating Temperature Ranges" for MX_74AJE/KE/LE variants. The device maintains ±1 LSB integral nonlinearity and 10ppm/°C reference drift across this full range.
Does MX574AJEPI require an external clock source?
No, MX574AJEPI does not require an external clock source. It contains a fully integrated oscillator circuit that generates a ~600kHz internal clock, enabling autonomous 25μs max conversion cycles. This eliminates timing synchronization overhead and external component dependencies - a key differentiator from many competing 12-bit ADCs.
How do I configure MX574AJEPI for ±10V bipolar input?
To configure MX574AJEPI for ±10V input, connect 20VIN to the analog signal source, AGND to system analog ground, BIPOFF to REFOUT, and REFIN to REFOUT. This setup leverages the internal 10V reference to establish symmetric ±10V full-scale range with offset binary coding - verified in Table 3 and Figure 15 of the datasheet.
What is the meaning of the 'EPI' suffix in MX574AJEPI?
The 'EPI' suffix in MX574AJEPI denotes a 28-pin plastic DIP (PDIP) package with industrial temperature range (–40°C to +85°C) and matte tin lead finish. The 'J' indicates the accuracy grade (±1 LSB INL), 'E' specifies the temperature grade, and 'PI' confirms the PDIP packaging - consistent with Maxim's standard ordering nomenclature.
Can MX574AJEPI interface directly with an 8-bit microprocessor bus?
Yes, MX574AJEPI supports direct 8-bit bus interfacing via its 12/8 and A0 pins. With 12/8 low, it outputs the 8 MSBs on D7–D0 when A0=0 (even address), and the 4 LSBs + 4 trailing zeros when A0=1 (odd address). No external latches or buffers are needed - confirmed in Table 2 and "Hardwiring for 8-Bit Data Buses" section of the datasheet.
MX574AJEPI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- External, Internal
- Voltage - Supply, Analog:
- ±11.4V ~ 16.5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MX574AJEPI FAQ
1.How can I place an order for MX574AJEPI through Aetrix?
Please submit a Request for Quotation (RFQ) for MX574AJEPI 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 MX574AJEPI reliable?
The price and inventory of MX574AJEPI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX574AJEPI is usually 5 days.
3.What payment methods are accepted for MX574AJEPI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX574AJEPI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX574AJEPI?
MX574AJEPI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX574AJEPI 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 MX574AJEPI?
For technical support, including MX574AJEPI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX574AJEPI requirements.
6.How does Aetrix verify that MX574AJEPI is sourced from the original manufacturer or authorized distributors?
All MX574AJEPI 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 MX574AJEPI meets industry standards.
7.What is the process for return or replacement of MX574AJEPI?
All MX574AJEPI units undergo pre-shipment inspection (PSI). If there is an issue with MX574AJEPI, 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 MX574AJEPI part is unused and in its original packaging.
Return procedure for MX574AJEPI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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