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Analog Devices Inc./Maxim Integrated MX674AJN+
- Part No.:
- MX674AJN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MX674AJN+.pdf
- Description:
- IC ADC 12BIT SAR 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,594
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Product details
Overview
MX674AJN+ from Maxim Integrated is a monolithic 12-bit successive-approximation ADC with integrated buried-zener reference (10V ±20mV), internal clock, and BiCMOS process. It delivers 15μs max conversion time, 150mW power dissipation at ±15V supplies, and supports ±5V/±10V bipolar or 0–10V/0–20V unipolar input ranges via pin strapping-used in high-speed data acquisition systems requiring stable on-chip timing and low-drift reference.
For engineers reviewing the MX674AJN+ datasheet, MX674AJN+ pinout, MX674AJN+ application, or MX674AJN+ equivalent, key selection factors include its 12-bit no-missing-codes performance over temperature, 15μs conversion time, ±1 LSB INL (at +25°C), 10ppm/°C reference TC, and compatibility with 8-/12-/16-bit microprocessor buses via CS/CE/R/C control logic.
Technical Context
The MX674AJN+ employs a successive approximation register (SAR) architecture with a 2.5kΩ-output DAC and zero-crossing comparator. Its internal 600kHz clock drives conversion cycles, and analog input settling is managed through external resistor networks (5kΩ for 10V span, 10kΩ for 20V span) tied to 10VIN/20VIN pins.
It operates in two primary interface modes: full-control mode (using CS, CE, R/C, A0, and 12/8) for microprocessor bus integration, and stand-alone mode (R/C pulse-triggered, CS/A0 grounded, CE/12/8 high) for dedicated analog subsystems-both supporting 12-bit or 8-bit partial-word readout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees 4096 discrete output codes with no missing codes over full temperature range. |
| Max Conversion Time | 15 μs - enables up to 66.7 kSPS sustained sampling in 12-bit mode, critical for real-time signal capture. |
| Reference Voltage | 10.00 V ±20 mV - low-drift buried-zener source providing ±1 LSB unipolar offset stability over temperature. |
| Integral Nonlinearity | ±1 LSB (TA = +25°C), ±1 LSB (TA = TMIN to TMAX) - ensures monotonicity and end-point accuracy in precision measurement. |
| Power Dissipation | 150 mW at ±15V - BiCMOS construction reduces thermal load vs. bipolar predecessors, easing heatsinking in dense layouts. |
| Analog Input Ranges | Configurable via pin strapping: ±5V / ±10V (bipolar) or 0–10V / 0–20V (unipolar) - eliminates need for external level-shifting circuitry. |
| Digital Interface | Three-state outputs with CS/CE/R/C control - supports direct connection to 8-bit (byte-split), 12-bit, or 16-bit buses without glue logic. |
Pinout & Package
MX674AJN+ 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; body dimensions are 1.375 × 0.600 × 0.230 inches.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VL | Logic supply input (+4.5V to +5.5V) - powers digital core and output buffers; decoupling required near pin. |
| 2 | 12/8 | Data format select - low = 8-bit bus mode (MSB/LSB split), high = 12-bit word output; determines software masking needs. |
| 3 | CS | Chip-select input - must be low to enable device; used with CE/R/C for full bus control timing. |
| 4 | A0 | Byte address/short-cycle input - sets conversion length (low = 12-bit, high = 8-bit) and selects output byte during reads. |
| 5 | R/C | Read/Convert control - low = initiate conversion, high = enable data read; also serves as trigger in stand-alone mode. |
| 6 | CE | Chip-enable input - high to activate; faster propagation than CS, preferred for conversion start timing. |
| 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 - drives REFIN and BIPOFF; can source 2mA total load when using ±15V supplies. |
| 9 | AGND | Analog ground reference - star-point connection for REFOUT, REFIN, BIPOFF, and analog inputs; must tie to system analog ground. |
| 10 | REFIN | Reference input - accepts internal REFOUT or external reference; connected via 50Ω resistor for bipolar offset calibration. |
| 11 | VEE | Negative analog supply (−16.5V to −11.4V) - powers comparator and analog front-end; decouple to AGND. |
| 12 | BIPOFF | Bipolar offset input - tied to REFOUT for ±5V/±10V operation; adjustable via external trimmer for zero-scale calibration. |
| 13 | 10VIN | 10V-span analog input - 5kΩ input impedance; used with AGND for 0–10V or ±5V ranges; leave open if using 20VIN. |
| 14 | 20VIN | 20V-span analog input - 10kΩ input impedance; used with AGND for 0–20V or ±10V ranges; dominant input when both present. |
| 15 | DGND | Digital ground - connects to VL and digital logic; joined to AGND at single point under IC for noise isolation. |
| 16–27 | D0–D11 | Three-state data outputs - latched 12-bit result; output format depends on 12/8 and A0 states; require pull-up if floating. |
| 28 | STS | Status output - high during conversion, low when data valid; used for polling or interrupt generation in microprocessor interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 10V buried-zener reference | 10ppm/°C tempco and <20mV initial tolerance eliminate external reference ICs and reduce board area/cost. |
| Pin-strappable input ranges | Single-component configuration of ±5V, ±10V, 0–10V, or 0–20V via jumper/resistor selection-no firmware or hardware redesign needed. |
| BiCMOS process technology | Reduces power by 3× vs. legacy bipolar ADCs (150mW vs. ~450mW), enabling higher channel density in thermally constrained systems. |
| Microprocessor-compatible interface | Native support for 8-/12-/16-bit buses via CS/CE/R/C logic avoids FIFOs or parallel-to-serial converters in embedded controllers. |
| No missing codes over temperature | Guaranteed monotonicity from −40°C to +85°C ensures reliable threshold detection and closed-loop control in industrial environments. |
Applications
| High-Speed Data Acquisition | Digital Signal Processing Front-End |
|---|---|
|
Use Scenario: Real-time waveform capture in oscilloscopes and automated test equipment sampling at 66.7 kSPS. IC Role / Device Role / Timing Role: Primary 12-bit analog-to-digital converter with internal clock and reference, synchronizing sample timing to system trigger. Use Value: Eliminates external clock generator and reference IC, reducing BOM count and layout complexity while maintaining ±1 LSB linearity. |
Use Scenario: Digitizing sensor outputs (e.g., vibration, acoustic, strain) prior to FFT or filtering in edge-processing nodes. IC Role / Device Role / Timing Role: High-fidelity signal digitizer interfacing directly to DSP's EMIF or DMA controller via 8-bit bus split mode. Use Value: 15μs conversion enables sub-15μs latency between analog event and first processed sample, critical for feedback loop responsiveness. |
| Industrial Process Monitoring | Electro-Mechanical Control Systems |
|
Use Scenario: Continuous monitoring of 4–20mA transducer outputs in PLC analog input modules operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Precision ADC with guaranteed no-missing-codes performance and low-drift reference for long-term calibration stability. Use Value: ±1 LSB INL and 10ppm/°C reference TC ensure <0.025% FS error drift over industrial temperature range-meets SIL-2 functional safety margins. |
Use Scenario: Closed-loop position/speed sensing in servo drives using resolver or LVDT analog feedback signals. IC Role / Device Role / Timing Role: Bipolar-input ADC configured for ±10V range, converting differential analog feedback into digital error signal for PID computation. Use Value: Direct ±10V support avoids op-amp level-shifting stages, improving SNR and reducing component-induced offset drift in motion control loops. |
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, external reference required, no on-chip clock, CMOS process (200mW). | Requires external 10V reference and clock generator; better suited for ultra-low-noise lab-grade instruments where reference flexibility is prioritized. | Select AD7874KNZ only if external reference calibration or custom clock frequency is mandatory; MX674AJN+ reduces component count in cost-sensitive industrial designs. |
| MAX1167BCAP+ | 16-bit SAR ADC, 10μs conversion, internal reference (2.048V), SPI interface, single +5V supply, 18mW typical power. | Higher resolution but incompatible voltage ranges (0–2.048V only); requires level-shifting for ±10V inputs and lacks bipolar offset pin. | Choose MAX1167BCAP+ for low-power, high-resolution applications with unipolar sensors; MX674AJN+ remains optimal for direct ±10V/0–20V interfacing without signal conditioning. |
Compared with AD7874KNZ and MAX1167BCAP+, the MX674AJN+ uniquely integrates 10V reference, clock, and bipolar offset control in a single PDIP package-enabling drop-in replacement in legacy industrial DAQ systems while reducing bill-of-materials and layout risk.
Availability
MX674AJN+ is available at Aetrix Electronics and suitable for high-speed data acquisition, industrial process monitoring, and electro-mechanical control systems requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for MX674AJN+ 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 MX674AJN+ belongs to Maxim's industry-standard complete ADC family, designed to replace multi-component discrete ADC solutions with monolithic, pin-compatible alternatives that simplify system design and improve long-term reliability in harsh environments.
FAQ
What is the maximum conversion time specification for MX674AJN+?
The MX674AJN+ has a maximum conversion time of 15 μs at +25°C, with typical performance of 12 μs and a worst-case of 15 μs across the full operating temperature range (−40°C to +85°C). This value is confirmed in the Electrical Characteristics table for MX674A under "CONVERSION TIME" with conditions VL = +5V, VCC = ±15V, VEE = ∓15V.
Does MX674AJN+ include an internal voltage reference?
Yes, the MX674AJN+ integrates a precision buried-zener voltage reference delivering 10.00 V ±20 mV at the REFOUT pin. Its temperature coefficient is 10 ppm/°C, and it can source up to 2 mA total load (including REFIN and BIPOFF) when operated with ±15V supplies-eliminating the need for external reference ICs in most applications.
What analog input voltage ranges does MX674AJN+ support?
The MX674AJN+ supports four pin-strappable input ranges: 0 to +10V, 0 to +20V (unipolar), and ±5V, ±10V (bipolar). Selection is achieved by connecting 10VIN or 20VIN to the analog source and tying BIPOFF to REFOUT for bipolar modes-no external resistors or op-amps are required for basic configuration.
Is MX674AJN+ compatible with 8-bit microprocessor buses?
Yes, the MX674AJN+ natively supports 8-bit bus interfacing via its 12/8 and A0 pins. When 12/8 = low, the 12-bit result is split into a high byte (D8–D11 + D4–D7) and low byte (D0–D3 + trailing zeros), allowing direct connection to 8-bit data buses without external latches or buffers.
What is the operating temperature range for MX674AJN+?
The MX674AJN+ is rated for operation from −40°C to +85°C (industrial grade), as indicated by the "J" suffix in its part number per Maxim's ordering guide. This range is validated across all electrical specifications including INL, DNL, conversion time, and reference stability-ensuring reliable performance in demanding industrial environments.
MX674AJN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 66k
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MX674AJN+ FAQ
1.How can I place an order for MX674AJN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MX674AJN+ 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 MX674AJN+ reliable?
The price and inventory of MX674AJN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX674AJN+ is usually 5 days.
3.What payment methods are accepted for MX674AJN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX674AJN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX674AJN+?
MX674AJN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX674AJN+ 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 MX674AJN+?
For technical support, including MX674AJN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX674AJN+ requirements.
6.How does Aetrix verify that MX674AJN+ is sourced from the original manufacturer or authorized distributors?
All MX674AJN+ 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 MX674AJN+ meets industry standards.
7.What is the process for return or replacement of MX674AJN+?
All MX674AJN+ units undergo pre-shipment inspection (PSI). If there is an issue with MX674AJN+, 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 MX674AJN+ part is unused and in its original packaging.
Return procedure for MX674AJN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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