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Analog Devices Inc./Maxim Integrated MX574AJCWI+
- Part No.:
- MX574AJCWI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MX574AJCWI+.pdf
- Description:
- IC ADC 12BIT SAR 28SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,813
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Product details
Overview
MX574AJCWI+ from Maxim Integrated is a monolithic 12-bit successive-approximation ADC with on-chip buried-zener reference (10V ±2mV), internal clock, and BiCMOS construction. It delivers 25μs max conversion time, ±1/2 LSB integral nonlinearity at +25°C, and supports ±5V/±10V bipolar or 0–+10V/0–+20V unipolar input ranges via pin strapping. It is used in high-accuracy process control systems requiring stable analog-to-digital conversion under industrial temperature conditions.
For engineers reviewing the MX574AJCWI+ datasheet, MX574AJCWI+ pinout, MX574AJCWI+ application, or MX574AJCWI+ equivalent, this page provides verified technical context, real-world interface timing, package-specific layout guidance, and validated alternative options for embedded data acquisition and DSP subsystems.
Technical Context
The MX574AJCWI+ employs a successive approximation register (SAR) architecture with a 2.5kΩ-output DAC and zero-crossing comparator. Its internal 10V reference exhibits 10ppm/°C drift and supplies up to 2mA for external REFIN/BIPOFF loads when operated from ±15V supplies.
It supports three operational modes: full microprocessor interface (using CS, CE, R/C, A0, 12/8), 8-bit bus interleave (left-justified, MSB/LSB split), and stand-alone mode (R/C-controlled). Conversion start and data read are decoupled, with STS indicating busy status and enabling interrupt-driven polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with no missing codes over temperature. |
| Max Conversion Time | 25μs - defines minimum sampling interval for continuous acquisition at ≤40kSPS. |
| Integral Nonlinearity | ±1/2 LSB (TA = +25°C, K/L/T/U grade) - ensures monotonicity and <0.012% full-scale linearity error. |
| Reference Output | 10.00V ±2mV (no load) - precision low-drift source enabling self-contained calibration without external voltage references. |
| Power Dissipation | 150mW (VCC = +15V, VEE = –15V) - enables operation in thermally constrained industrial enclosures without forced cooling. |
| Analog Input Range | Selectable ±5V or ±10V bipolar / 0–+10V or 0–+20V unipolar - accommodates standard sensor outputs and industrial signal levels without external scaling. |
| Digital Interface | Three-state parallel outputs (D0–D11), 12/8 and A0 configurable for 8-bit bus interleave or 12-bit word - eliminates need for external latches or glue logic in 8-bit microcontroller systems. |
Pinout & Package
MX574AJCWI+ is housed in a 28-pin wide-body SOIC (SOIC-W) package with 0.300" body width and standard JEDEC MO-013AC footprint. Pin spacing is 0.050", lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VL | Logic supply input (+4.5V to +5.5V) - powers digital core and output buffers; must be decoupled locally to DGND. |
| 2 | 12/8 | Data format select - low enables 8-bit bus interleave (MSB byte at even address, LSB nibble + zeros at odd); high enables 12-bit word output. |
| 3 | CS | Chip-select input - active-low enable; must be asserted with CE and R/C for valid control sequencing. |
| 4 | A0 | Byte address/short-cycle input - low initiates 12-bit conversion; high initiates 8-bit conversion; also selects MSB/LSB byte during read. |
| 5 | R/C | Read/Convert control - low starts conversion; high enables data read; determines mode (full control vs. stand-alone). |
| 6 | CE | Chip-enable input - active-high; faster propagation than CS; primary signal for initiating conversions and reads. |
| 7 | VCC | Positive analog supply (+11.4V to +16.5V) - powers SAR, DAC, and reference; requires 4.7μF + 0.1μF decoupling to AGND. |
| 8 | REFOUT | +10V reference output - low-noise, low-drift zener source; drives REFIN and BIPOFF; can supply 2mA total load. |
| 9 | AGND | Analog ground - reference point for REFOUT, REFIN, BIPOFF, and analog inputs; must be tied to system analog star ground. |
| 10 | REFIN | Reference input - accepts external reference or connects to REFOUT for internal reference use; 50Ω resistor required for bipolar offset calibration. |
| 11 | VEE | Negative analog supply (–11.4V to –16.5V) - powers analog circuitry; requires same decoupling as VCC to AGND. |
| 12 | BIPOFF | Bipolar offset input - connects to REFOUT for ±5V/±10V operation; enables offset trimming via external 50Ω resistor. |
| 13 | 10VIN | 10V-span analog input - 5kΩ input impedance; used with AGND for 0–+10V or ±5V ranges. |
| 14 | 20VIN | 20V-span analog input - 10kΩ input impedance; used with AGND for 0–+20V or ±10V ranges; requires minimal capacitance on 10VIN. |
| 15 | DGND | Digital ground - reference for VL, D0–D11, and logic inputs; connected to AGND at single point near package. |
| 16–27 | D0–D11 | Three-state data outputs - CMOS-compatible, 150ns max access time; driven only when CE and R/C are high and CS is low. |
| 28 | STS | Status output - open-drain, active-high during conversion; used for polling or interrupt generation; transitions low at conversion completion. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 10V buried-zener reference | 10ppm/°C tempco and ±2mV initial accuracy eliminate need for external reference ICs and reduce BOM count by one component. |
| Pin-strappable input ranges | Hardware-selectable ±5V, ±10V, 0–+10V, or 0–+20V operation avoids firmware configuration overhead and ensures deterministic analog interface behavior. |
| BiCMOS process technology | Reduces power dissipation to 150mW - 3× lower than comparable bipolar ADCs - enabling higher channel density in space-constrained PLC modules. |
| 8-bit bus interleave mode | Native left-justified 12-bit output split across two 8-bit cycles (MSB byte, then LSB nibble + zeros) removes requirement for external data latches in 8051/AVR-based designs. |
| Stand-alone R/C control mode | Enables direct microcontroller GPIO connection without address decoding logic - simplifies integration into FPGA- or CPLD-based data loggers. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous monitoring of 4–20mA current loops converted to voltage via precision shunt resistors in chemical plant control cabinets. IC Role / Device Role / Timing Role: Primary 12-bit ADC digitizing analog sensor outputs with ±5V range and 25μs conversion cycle for 40kSPS sampling. Use Value: Internal reference and no-missing-codes guarantee repeatability across 0°C to +70°C operating range without recalibration. |
Use Scenario: High-speed digitization of DUT output waveforms during functional testing on production floor test racks. IC Role / Device Role / Timing Role: Stand-alone mode ADC triggered by R/C pulse from test controller; STS signals completion to synchronize capture logic. Use Value: 150ns data access time and three-state outputs allow direct connection to 8-bit test bus without wait states or bus contention. |
| Motor Drive Current Sensing | Medical Instrumentation Signal Chain |
|
Use Scenario: Isolated phase current measurement using Hall-effect sensors feeding ±10V outputs into servo drive feedback PCBs. IC Role / Device Role / Timing Role: Bipolar-input ADC configured for ±10V range; REFIN/BIPOFF pins calibrated with 50Ω resistors for offset nulling. Use Value: ±1/2 LSB INL and 10ppm/°C reference stability ensure torque command fidelity within ±0.1% full-scale error over motor thermal cycling. |
Use Scenario: Digitizing ECG amplifier outputs in portable diagnostic devices where size and power budget constrain external components. IC Role / Device Role / Timing Role: Unipolar 0–+10V ADC accepting conditioned biopotential signals; internal reference replaces discrete 10V IC to save board area. Use Value: 150mW total power and SOIC-W package enable integration into compact battery-powered handheld units with minimal thermal impact. |
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 |
|---|---|---|---|
| AD7892BRZ-1 | 2µs conversion time, 5V-only supply, no internal reference - requires external 10V ref and level-shifting for ±15V analog front-end. | Optimized for low-voltage, high-speed portable systems; lacks bipolar input support and industrial temp range. | Select when speed >25μs is critical and system already uses 5V analog rails and external reference infrastructure. |
| ADS7800U | 10μs conversion, ±12V analog supply compatible, internal 2.5V ref - needs external gain/level-shift for ±10V inputs; no buried-zener stability. | Targets precision data logging with lower power (100mW), but requires external op-amps for full-scale range adaptation. | Select when cost-sensitive industrial designs prioritize lower power and accept added analog conditioning complexity. |
Compared with MX574AJCWI+, AD7892BRZ-1 offers faster throughput but demands redesign of reference and supply architecture, while ADS7800U reduces power at the expense of input flexibility and long-term drift performance - making MX574AJCWI+ optimal for drop-in replacement in legacy ±15V industrial systems requiring proven 10ppm/°C stability.
Availability
MX574AJCWI+ is available at Aetrix Electronics and suitable for industrial process control, automated test equipment, motor drive feedback, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MX574AJCWI+ 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 applications.
The MX574A series belongs to Maxim's legacy precision data converter product line, designed specifically for industrial-grade, self-contained 12-bit ADC applications where integrated reference, robust bipolar/unipolar input flexibility, and wide temperature operation are mandatory.
FAQ
What is the maximum operating temperature range for the MX574AJCWI+?
The MX574AJCWI+ is rated for operation from 0°C to +70°C (commercial grade). This is confirmed by the "J" suffix in the part number per Maxim's ordering guide, which maps to the 0°C to +70°C temperature range. The device maintains specified INL, conversion time, and reference accuracy across this full range.
Does the MX574AJCWI+ require external clock circuitry?
No, the MX574AJCWI+ does not require external clock circuitry. It integrates a complete clock generator internally, enabling autonomous conversion operation. The typical internal clock frequency is approximately 600kHz, supporting the specified 25μs maximum conversion time without any external timing components.
Can the MX574AJCWI+ interface directly with an 8-bit microcontroller bus?
Yes, the MX574AJCWI+ supports direct 8-bit bus interfacing via its 12/8 and A0 pins. When 12/8 is low, it outputs the 8 MSBs on the first read cycle (A0 = 0) and the 4 LSBs followed by four zeros on the second (A0 = 1), eliminating the need for external latches or data alignment logic in 8051 or PIC-based systems.
What analog input ranges does the MX574AJCWI+ support, and how are they selected?
The MX574AJCWI+ supports ±5V, ±10V, 0–+10V, and 0–+20V input ranges. Selection is achieved via pin strapping: connecting BIPOFF to REFOUT enables bipolar mode; choosing 10VIN or 20VIN as the signal input terminal sets the span. No software configuration is needed - the range is determined solely by external connections.
Is the internal reference of the MX574AJCWI+ suitable for driving external circuitry?
Yes, the internal 10V reference (REFOUT) of the MX574AJCWI+ can supply up to 2mA total current for external loads, including the REFIN and BIPOFF inputs. However, this capability is guaranteed only when operating from ±15V supplies; with ±12V supplies, REFOUT can drive only REFIN and BIPOFF, not additional external circuitry.
MX574AJCWI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MX574AJCWI+ FAQ
1.How can I place an order for MX574AJCWI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MX574AJCWI+ 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 MX574AJCWI+ reliable?
The price and inventory of MX574AJCWI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX574AJCWI+ is usually 5 days.
3.What payment methods are accepted for MX574AJCWI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX574AJCWI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX574AJCWI+?
MX574AJCWI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX574AJCWI+ 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 MX574AJCWI+?
For technical support, including MX574AJCWI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX574AJCWI+ requirements.
6.How does Aetrix verify that MX574AJCWI+ is sourced from the original manufacturer or authorized distributors?
All MX574AJCWI+ 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 MX574AJCWI+ meets industry standards.
7.What is the process for return or replacement of MX574AJCWI+?
All MX574AJCWI+ units undergo pre-shipment inspection (PSI). If there is an issue with MX574AJCWI+, 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 MX574AJCWI+ part is unused and in its original packaging.
Return procedure for MX574AJCWI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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