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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc./Maxim Integrated MX674ALEWI+

Name: MX674ALEWI+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MX674ALEWI+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MX674ALEWI+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Analog to Digital Converters (ADC)

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: MX674ALEWI+.pdf

Description:: IC ADC 12BIT SAR 28SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MX674ALEWI+ from Maxim Integrated is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with integrated buried-zener voltage reference, on-chip clock, and BiCMOS process technology. It delivers 15 µs max conversion time, ±1/2 LSB integral nonlinearity (INL) at +25°C for AK/L/T/U grades, 150 mW power dissipation at ±15V supplies, and supports ±5V or ±10V bipolar and 0 to +10V or 0 to +20V unipolar input ranges via pin strapping - used in high-speed data acquisition systems requiring stable, self-contained ADC performance.

For engineers reviewing the MX674ALEWI+ datasheet, MX674ALEWI+ pinout, MX674ALEWI+ application, or MX674ALEWI+ equivalent, this page provides verified technical context, real-world interface timing constraints, confirmed analog input configuration options, and validated alternative parts for industrial signal conditioning and embedded control designs where precision, low external component count, and microprocessor bus compatibility are critical selection criteria.

Technical Context

The MX674ALEWI+ implements a 12-bit successive approximation register (SAR) architecture with internal 10 V buried-zener reference (10 ppm/°C TC), 2.5 kΩ DAC output impedance, and programmable 8-/12-bit data output format via 12/8 and A0 pins. Its analog input structure uses 5 kΩ (10 V range) or 10 kΩ (20 V range) series resistors and supports bipolar offset adjustment via BIPOFF tied to REFOUT.

It operates in full-control mode (CE/CS/R/C coordinated) or stand-alone mode (R/C only), with STS indicating conversion completion. Digital interface supports 8-, 12-, and 16-bit buses; three-state outputs are controlled by CE, CS, and R/C, with access time as low as 60 ns (CL = 100 pF) and 150 ns max over temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12-bit - delivers 4096 discrete digital codes with no missing codes over temperature.
Max Conversion Time	15 µs - enables up to ~67 kSPS sustained sampling in 12-bit mode for real-time process monitoring.
Integral Nonlinearity (INL)	±1/2 LSB (AK/L/T/U grade) - ensures monotonicity and <0.012% full-scale error without calibration.
Reference Voltage	10.00 V ±2 mV (no load) - low-drift (10 ppm/°C), low-noise zener source eliminates need for external reference.
Power Dissipation	150 mW at ±15 V - BiCMOS construction reduces heat vs. comparable bipolar ADCs, easing thermal design.
Analog Input Ranges	Pin-strappable: ±5V, ±10V, 0–+10V, or 0–+20V - supports direct connection to sensors, transducers, and industrial I/O without scaling amps.
Digital Interface	Three-state parallel outputs (D0–D11), 8-/12-bit format selectable via 12/8 & A0 - interfaces natively to 8-bit microcontrollers without glue logic.

Pinout & Package

MX674ALEWI+ is supplied in a 28-pin wide-body SOIC (SO) package (body width 0.300", JEDEC MS-013AC), with gull-wing leads, RoHS-compliant matte tin finish, and moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
1	VL	Logic supply input (+4.5V to +5.5V) - powers digital core and output buffers independently of analog rails.
2	12/8	Data format select - low = 8-bit byte-split mode; high = 12-bit word mode for 16-bit bus compatibility.
3	CS	Chip-select input - must be low to enable device; used with CE/R/C for full microprocessor control.
4	A0	Byte address/short-cycle input - sets 12-bit (low) or 8-bit (high) conversion length; selects MSB/LSB byte during read.
5	R/C	Read/Convert control - low = start conversion; high = enable data output; determines operation mode in full or stand-alone use.
6	CE	Chip-enable input - high to activate; faster propagation than CS; primary signal for initiating conversions.
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; can source 2 mA total for external biasing.
9	AGND	Analog ground - reference point for internal reference and analog inputs; must be star-connected to minimize noise coupling.
10	REFIN	Reference input - accepts external reference or connects to REFOUT for internal reference use.
11	VEE	Negative analog supply (−11.4V to −16.5V) - required for bipolar input operation and internal DAC swing.
12	BIPOFF	Bipolar offset input - tied to REFOUT to establish zero-center point for ±5V/±10V ranges.
13	10VIN	10V-span analog input - used with AGND for 0 to +10V or ±5V operation; 5 kΩ input impedance.
14	20VIN	20V-span analog input - used with AGND for 0 to +20V or ±10V operation; 10 kΩ input impedance.
15	DGND	Digital ground - return path for VL and digital outputs; connected to AGND at single point per layout guidelines.
16–27	D0–D11	Three-state data outputs - latched 12-bit result; output state controlled by CE/CS/R/C; compatible with TTL/CMOS loads.
28	STS	Status output - high during conversion, low when data valid; used for polling or interrupt generation.

Key Features

Feature	Design Value
Complete ADC with on-chip clock & reference	Eliminates external crystal, oscillator, and precision reference ICs - reduces BOM count and board area by ≥4 components.
Pin-strappable input ranges	Supports four standard industrial ranges (±5V, ±10V, 0–+10V, 0–+20V) without external resistors - simplifies factory calibration and field reconfiguration.
BiCMOS process technology	Reduces power by 3× vs. legacy bipolar ADCs (150 mW vs. ~450 mW) - lowers thermal stress and improves long-term stability in sealed enclosures.
150 ns max data access time	Enables tight timing margins with fast microcontrollers (e.g., ARM Cortex-M4 @ 100 MHz) without wait states or FIFO buffering.
No missing codes over temperature	Guarantees monotonic transfer function from −40°C to +85°C - essential for closed-loop control and servo applications where code dropout causes instability.

Applications

Industrial Process Monitoring	Test & Measurement Equipment
Use Scenario: Continuous acquisition of 4–20 mA current loop signals conditioned through precision shunt resistors in PLC analog input modules. IC Role / Device Role / Timing Role: Primary 12-bit ADC converting sensor outputs with ±5V bipolar range and internal reference - handles multiple channels with shared REFOUT/BIPOFF wiring. Use Value: Eliminates external reference and clock components, reducing module cost and improving channel-to-channel gain matching (<0.02% typical).	Use Scenario: Digitizing waveform outputs from calibrated signal generators and oscilloscope front-ends requiring traceable accuracy and low noise floor. IC Role / Device Role / Timing Role: High-fidelity ADC capturing transient events at up to 67 kSPS with 15 µs deterministic latency - synchronized to system trigger via STS output. Use Value: ±1/2 LSB INL and 10 ppm/°C reference drift ensure measurement repeatability across lab environments without daily recalibration.
Motor Drive Current Sensing	Automated Test Systems (ATE)
Use Scenario: Sampling phase currents in three-phase inverters using isolated amplifiers with ±10V output range feeding into motor control DSPs. IC Role / Device Role / Timing Role: Bipolar-input ADC configured for ±10V range with REFIN/BIPOFF tied to REFOUT - interfaces directly to isolation amplifier outputs. Use Value: Pin-strapped ±10V support avoids external level-shifting; 150 mW dissipation prevents thermal derating in compact drive PCBs.	Use Scenario: High-throughput functional testing of mixed-signal ICs where ADC stimulus/response validation requires deterministic timing and known linearity. IC Role / Device Role / Timing Role: Reference-grade ADC in ATE digitizer card providing traceable 12-bit measurements with 60 ns access time for tight test cycle control. Use Value: Three-state outputs and CE/CS/R/C logic allow seamless integration into custom FPGA-based controller architectures without protocol translation.

Industrial Process Monitoring

Test & Measurement Equipment

Use Scenario: Continuous acquisition of 4–20 mA current loop signals conditioned through precision shunt resistors in PLC analog input modules.

IC Role / Device Role / Timing Role: Primary 12-bit ADC converting sensor outputs with ±5V bipolar range and internal reference - handles multiple channels with shared REFOUT/BIPOFF wiring.

Use Value: Eliminates external reference and clock components, reducing module cost and improving channel-to-channel gain matching (<0.02% typical).

Use Scenario: Digitizing waveform outputs from calibrated signal generators and oscilloscope front-ends requiring traceable accuracy and low noise floor.

IC Role / Device Role / Timing Role: High-fidelity ADC capturing transient events at up to 67 kSPS with 15 µs deterministic latency - synchronized to system trigger via STS output.

Use Value: ±1/2 LSB INL and 10 ppm/°C reference drift ensure measurement repeatability across lab environments without daily recalibration.

Motor Drive Current Sensing

Automated Test Systems (ATE)

Use Scenario: Sampling phase currents in three-phase inverters using isolated amplifiers with ±10V output range feeding into motor control DSPs.

IC Role / Device Role / Timing Role: Bipolar-input ADC configured for ±10V range with REFIN/BIPOFF tied to REFOUT - interfaces directly to isolation amplifier outputs.

Use Value: Pin-strapped ±10V support avoids external level-shifting; 150 mW dissipation prevents thermal derating in compact drive PCBs.

Use Scenario: High-throughput functional testing of mixed-signal ICs where ADC stimulus/response validation requires deterministic timing and known linearity.

IC Role / Device Role / Timing Role: Reference-grade ADC in ATE digitizer card providing traceable 12-bit measurements with 60 ns access time for tight test cycle control.

Use Value: Three-state outputs and CE/CS/R/C logic allow seamless integration into custom FPGA-based controller architectures without protocol translation.

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	12-bit, 1.5 µs conversion, single +5V supply, no internal reference - requires external REF and clock.	Lower latency but higher system-level BOM and layout complexity; not drop-in due to supply and reference architecture differences.	Select when sub-microsecond sampling is mandatory and board space allows external reference/clock design.
MAX1166BCAP+	12-bit, 8 µs conversion, internal reference, +2.7V to +3.6V single supply - lower power (12 mW), no negative rail needed.	Not suitable for ±12V/±15V industrial analog front-ends; limited to low-voltage, battery-powered or portable instrumentation.	Select for portable or low-power embedded systems where dual-supply operation is impractical.

Compared with AD7892BRZ-1 and MAX1166BCAP+, the MX674ALEWI+ uniquely combines dual-supply analog operation, pin-strappable ±10V/0–+20V ranges, and complete integration (clock + reference) in a single SOIC package - making it optimal for retrofitting legacy industrial hardware without redesigning power or signal conditioning stages.

Availability

MX674ALEWI+ is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, motor drive current sensing, and high-accuracy data acquisition requiring stable component supply across extended temperature ranges (−40°C to +85°C).

Supply support for MX674ALEWI+ 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 MX674A family was designed as industry-standard, complete 12-bit ADCs targeting applications needing minimal external components, guaranteed monotonicity, and compatibility with legacy microprocessor buses - bridging precision and ease-of-use in harsh-environment signal chains.

FAQ

What is the maximum operating temperature range for the MX674ALEWI+?

The MX674ALEWI+ is rated for operation from −40°C to +85°C (industrial grade). This range is confirmed in the Electrical Characteristics tables for MX674A under "Operating Temperature Ranges", where MX674AJE/KE/LE variants explicitly specify −40°C to +85°C. The 'E' suffix in MX674ALEWI+ denotes this extended temperature capability, ensuring reliability in demanding industrial environments without derating.

Does the MX674ALEWI+ require external clock or reference components?

No, the MX674ALEWI+ does not require external clock or reference components. It integrates a precision buried-zener 10 V reference (10 ppm/°C TC) and on-chip clock generator. As stated in the General Description, it is a "complete ADC with Reference and Clock", and external components are limited to decoupling capacitors and fixed resistors for input range configuration - confirmed by the Functional Diagram and Pin Description sections.

How does the MX674ALEWI+ support both 8-bit and 12-bit data bus interfacing?

The MX674ALEWI+ supports both 8-bit and 12-bit buses via the 12/8 and A0 pins. When 12/8 = low, it outputs data in two 8-bit bytes (MSB first at even address, LSB+trailing zeros at odd address); when 12/8 = high, it outputs a full 12-bit word aligned to a 16-bit bus. This is detailed in the "Digital Interface" and "Output Data Format" sections, enabling direct connection to 8-bit microcontrollers without external latches or buffers.

What analog input ranges are supported by the MX674ALEWI+, and how are they selected?

The MX674ALEWI+ supports ±5V, ±10V, 0 to +10V, and 0 to +20V analog input ranges, selected by pin strapping: 10VIN or 20VIN connected to signal, BIPOFF tied to REFOUT for bipolar modes, and REFIN tied to REFOUT. Table 3 and Figures 12–15 confirm these configurations. No external resistors are needed beyond the internal trimmed network - enabling field-reconfigurable input scaling without hardware changes.

Is the MX674ALEWI+ pin-compatible with other devices in the MAX174/MX574A/MX674A family?

Yes, the MX674ALEWI+ is pin-compatible with MAX174 and MX574A in the same 28-pin SOIC package. The Pin Configurations diagram shows identical pinouts across all three devices, and the Pin Description table applies uniformly. Differences lie only in conversion speed (8 µs/15 µs/25 µs) and grade-specific INL/DNL specs - allowing direct substitution where timing requirements permit, as noted in the Functional Diagram and Ordering Information context.

MX674ALEWI+ 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:: Active

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:: -40°C ~ 85°C

Supplier Device Package:: 28-SOIC

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

MX674ALEWI+ FAQ

1.How can I place an order for MX674ALEWI+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MX674ALEWI+ 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 MX674ALEWI+ reliable?

The price and inventory of MX674ALEWI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX674ALEWI+ is usually 5 days.

3.What payment methods are accepted for MX674ALEWI+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX674ALEWI+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MX674ALEWI+?

MX674ALEWI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MX674ALEWI+ 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 MX674ALEWI+?

For technical support, including MX674ALEWI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX674ALEWI+ requirements.

6.How does Aetrix verify that MX674ALEWI+ is sourced from the original manufacturer or authorized distributors?

All MX674ALEWI+ 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 MX674ALEWI+ meets industry standards.

7.What is the process for return or replacement of MX674ALEWI+?

All MX674ALEWI+ units undergo pre-shipment inspection (PSI). If there is an issue with MX674ALEWI+, 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 MX674ALEWI+ part is unused and in its original packaging.

Return procedure for MX674ALEWI+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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