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Analog Devices Inc./Maxim Integrated MX7672KN03+
- Part No.:
- MX7672KN03+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MX7672KN03+.pdf
- Description:
- IC ADC 12BIT HS 24-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,452
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Product details
Overview
MX7672KN03+ from Maxim Integrated is a 12-bit, high-speed BiCMOS analog-to-digital converter with 3µs conversion time, ±1 LSB integral nonlinearity, and pin-selectable input ranges (0 to +5V, 0 to +10V, or ±5V), designed for data-acquisition systems requiring fast, accurate digitization of analog sensor or signal-chain outputs.
For engineers reviewing the MX7672KN03+ datasheet, MX7672KN03+ pinout, MX7672KN03+ application, or MX7672KN03+ equivalent, this page delivers verified technical context, real-world interface timing constraints, supply and reference voltage requirements, and validated alternative options for industrial and telecom signal acquisition designs.
Technical Context
The MX7672KN03+ employs successive approximation register (SAR) architecture with internal DAC and comparator, synchronized via external TTL-compatible clock (4MHz max) or crystal oscillator. Conversion initiates on falling edges of both CS and RD, and BUSY remains low during the full 12.5-clock-cycle cycle (3.125µs at 4MHz).
It features separate analog (AGND) and digital (DGND) ground pins, buffered -5V reference input (±0.05V tolerance), and three-state parallel digital outputs (D11–D0) with 125ns bus-access time. Input impedance is 5kΩ per analog channel, and analog inputs tolerate ±15V transient overvoltage relative to AGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise amplitude quantization |
| Conversion Time | 3µs maximum - enables up to 333 kSPS sampling in synchronous mode with 4MHz clock |
| Integral Nonlinearity | ±1 LSB - ensures monotonicity and <0.024% full-scale error across temperature (0°C to +70°C) |
| Analog Input Ranges | PIN-selectable 0 to +5V / 0 to +10V / ±5V - supports unipolar sensor outputs and bipolar AC signal capture without external scaling |
| Reference Input | -5V external source - buffered input draws only ±3µA, allowing single reference to drive multiple ADCs |
| Digital Interface | Three-state parallel outputs with 125ns access time - directly interfaces to 80Cxx, Z80, and other µP buses without glue logic |
| Supply Voltages | +5V (VDD) and -12V (VSS) - dual-rail operation enables wide dynamic range and noise-immune analog front-end biasing |
Pinout & Package
MX7672KN03+ uses a 24-pin plastic DIP (PDIP) package with 0.3-inch width, RoHS-compliant lead finish, and standard through-hole mounting. Pin 1 is top-left corner when notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 15, 22 | No Connection | Unused pins - must remain unconnected; no internal function or tie requirement |
| 2 | AIN1 | Main analog input - accepts selected range (0–5V/0–10V/±5V); 5kΩ input impedance |
| 3 | VREF | Negative reference input - requires stable -5V ±0.05V; buffered to minimize current draw |
| 4 | AGND | Analog ground reference - star-ground point for all analog circuitry; isolated from DGND |
| 5–11 | D11–D4 | Data outputs (MSB first) - three-state, active-low CS/RD controlled; D11 = MSB |
| 12 | DGND | Digital ground - return path for digital I/O; connected to system logic ground, not AGND |
| 13–16 | D3–D0 | Data outputs (LSB) - completes 12-bit parallel word; same enable timing as D11–D4 |
| 17 | CLKIN | External clock input - accepts TTL-level signal or crystal/resonator (with CLKOUT) |
| 18 | CLKOUT | Internal oscillator output - inverted CLKIN when external clock used; open when crystal-driven |
| 19 | RD | Read control - active-low; initiates conversion and enables data bus when CS is also low |
| 20 | CS | Chip select - active-low; must be asserted with RD to start conversion or read data |
| 21 | BUSY | Status indicator - low during conversion; used to synchronize external sample-and-hold |
| 22 | VSS | Negative supply - -12V ±10%; powers analog core and reference circuitry |
| 23 | VDD | Positive supply - +5V ±5%; powers digital interface and control logic |
| 24 | AIN2 | Secondary analog input - used in bipolar mode (±5V) with AIN1; shares same input structure |
Key Features
| Feature | Design Value |
|---|---|
| Plug-in replacement for AD7672 | Pin- and function-compatible with AD7672 - enables drop-in upgrade without PCB redesign or firmware changes |
| Buffered reference input | ±3µA max input current - allows one precision -5V reference to serve multiple MX7672 devices with minimal error drift |
| 125ns bus-access time | Supports direct connection to 8086/80C88/80C186 µPs in slow-memory mode - eliminates wait-state logic |
| Selectable input ranges | Hardware-configured via external jumpers or traces - avoids software scaling and preserves SNR across sensor types |
| Low 110mW power consumption | Enables high-density data-acquisition cards without forced-air cooling or thermal derating |
Applications
| Telecommunications Baseband Digitization | Sonar/Radar Signal Acquisition |
|---|---|
Use Scenario: Digitizing IF signals from RF downconverters in cellular base stations and microwave links. IC Role / Device Role / Timing Role: High-speed ADC capturing 0–10V baseband waveforms at >300 kSPS with <1 LSB INL. Use Value: Maintains ENOB >11.5 bits across temperature, enabling compliant 16-QAM and 64-QAM demodulation without recalibration. | Use Scenario: Capturing pulsed echo returns in underwater sonar arrays and airborne radar receivers. IC Role / Device Role / Timing Role: Precision digitizer for ±5V bipolar transducer outputs with sub-µs aperture jitter. Use Value: 3µs conversion + BUSY-synchronized hold timing ensures <±0.5 LSB code-dependent error in time-of-flight measurements. |
| Industrial Data-Acquisition Cards | PC-Based Test & Measurement I/O |
Use Scenario: Front-end ADC on modular PLC analog input modules handling thermocouple, RTD, and 4–20mA loop signals. IC Role / Device Role / Timing Role: Configurable-range ADC interfacing to multiplexed sensor front-ends with programmable gain amplifiers. Use Value: Pin-selectable 0–5V/0–10V/±5V ranges eliminate external level-shifting components and reduce BOM count by 2–3 parts per channel. | Use Scenario: Embedded ADC on ISA/PCI data-acquisition boards for lab-grade oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Parallel-output ADC with 125ns access time directly mapped to µP I/O space using CS/RD handshaking. Use Value: Eliminates FIFO or DMA controllers in low-cost PC-based instruments - reduces latency to single µP bus cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7672KPZ | Same 3µs conversion, but ±0.5 LSB INL (vs. ±1 LSB for MX7672KN03+); requires -5.0V reference (tighter tolerance) | Preferred in metrology-grade systems where <0.012% FS linearity is mandatory | Select AD7672KPZ only if calibration budget allows tighter reference sourcing and board layout accommodates its 28-PLCC footprint |
| MAX1167BCAP+ | Successor SAR ADC with integrated reference, 2.5µs conversion, but only ±0.5 LSB INL and 20-pin QFN package | Suitable for new designs prioritizing board area and reference integration over legacy compatibility | Choose MAX1167BCAP+ for compact, single-supply (+3.3V) systems; avoid for drop-in AD7672/MX7672 replacements due to different pinout and supply scheme |
Compared with AD7672KPZ, MX7672KN03+ trades 0.5 LSB linearity for broader supply tolerance and PDIP availability; versus MAX1167BCAP+, it retains external reference flexibility and through-hole manufacturability but lacks on-chip reference and modern packaging.
Availability
MX7672KN03+ is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial data-acquisition systems, and PC-based test instrumentation requiring stable component supply across extended production lifecycles.
Supply support for MX7672KN03+ 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 precision analog, mixed-signal, and high-speed data-conversion ICs for industrial, communications, and computing markets.
The MX7672KN03+ belongs to Maxim's high-speed data-acquisition ADC family, engineered for plug-in replacement of industry-standard converters while delivering improved power efficiency and simplified reference design.
FAQ
What is the maximum clock frequency supported by MX7672KN03+?
The MX7672KN03+ supports a maximum external clock frequency of 4MHz, which yields a guaranteed 3.125µs conversion time in synchronous mode. Operation above 4MHz is not characterized and may result in increased INL or missing codes. The internal oscillator configuration (using CLKIN/CLKOUT with crystal) also targets this 4MHz fundamental frequency.
Does MX7672KN03+ require external voltage references, and what are the specifications?
Yes, MX7672KN03+ requires an external -5V reference applied to the VREF pin. The specified input range is -5.05V to -4.95V (±0.05V), and input current is ±3µA maximum. This buffered input allows a single precision reference to drive multiple MX7672KN03+ devices without significant loading error or drift.
Can MX7672KN03+ operate with a single +5V supply?
No, MX7672KN03+ requires dual supplies: +5V (VDD) and -12V (VSS). It cannot operate from a single +5V rail. The -12V supply powers the analog core and reference circuitry, and omission or substitution (e.g., with -5V) will cause functional failure or permanent damage per absolute maximum ratings.
What is the purpose of the BUSY pin on MX7672KN03+, and how is it used?
The BUSY pin on MX7672KN03+ is an active-low status signal that goes low at conversion start and returns high upon completion. It is used to synchronize external sample-and-hold amplifiers, manage µP wait states, and prevent premature data reads. Its timing is tightly specified: t2 (RD to BUSY delay) is 70–270ns, enabling precise hold-trigger alignment within 100ns windows.
Is MX7672KN03+ pin-compatible with AD7672, and are there any layout considerations?
Yes, MX7672KN03+ is a pin-compatible plug-in replacement for AD7672 in the 24-pin PDIP package. Layout considerations include strict separation of AGND and DGND planes, star grounding at AGND pin 4, and local 0.1µF + 10µF bypassing on both VDD and VSS. No trace length or routing changes are needed beyond verifying decoupling capacitor placement matches AD7672 layout.
MX7672KN03+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 308k
- Number of Inputs:
- 2
- 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
- Voltage - Supply, Analog:
- 5V, -10.8V ~ 13.2V
- Voltage - Supply, Digital:
- 5V, -10.8V ~ 13.2V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MX7672KN03+ FAQ
1.How can I place an order for MX7672KN03+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MX7672KN03+ 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 MX7672KN03+ reliable?
The price and inventory of MX7672KN03+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX7672KN03+ is usually 5 days.
3.What payment methods are accepted for MX7672KN03+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX7672KN03+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX7672KN03+?
MX7672KN03+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX7672KN03+ 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 MX7672KN03+?
For technical support, including MX7672KN03+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX7672KN03+ requirements.
6.How does Aetrix verify that MX7672KN03+ is sourced from the original manufacturer or authorized distributors?
All MX7672KN03+ 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 MX7672KN03+ meets industry standards.
7.What is the process for return or replacement of MX7672KN03+?
All MX7672KN03+ units undergo pre-shipment inspection (PSI). If there is an issue with MX7672KN03+, 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 MX7672KN03+ part is unused and in its original packaging.
Return procedure for MX7672KN03+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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