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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 SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,077
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Product details
Overview
MX7672KN03 from Maxim Integrated is a 12-bit, BiCMOS analog-to-digital converter (ADC) with 3µs conversion time, ±1 LSB integral nonlinearity, and 125ns bus-access time. It operates from +5V and -12V supplies, accepts an external -5V reference, and supports pin-selectable input ranges (0–5V, 0–10V, or ±5V). It is used in high-speed data-acquisition systems for radar signal processing and PC I/O boards.
For engineers reviewing the MX7672KN03 datasheet, MX7672KN03 pinout, MX7672KN03 application, or MX7672KN03 equivalent, key selection criteria include guaranteed 3µs conversion at 4MHz clock, ±1 LSB INL over 0°C to +70°C, PDIP-24 package compatibility, and buffered reference input enabling multi-ADC sharing of a single -5V reference source.
Technical Context
The MX7672KN03 employs successive approximation register (SAR) architecture with internal DAC and comparator, synchronized via external TTL-compatible CLKIN or crystal oscillator between CLKIN/CLKOUT. Conversion initiates on simultaneous falling edges of CS and RD, with BUSY signaling active conversion state.
It features separate analog (AGND) and digital (DGND) ground pins, dual supply rails (+5V VDD, -12V VSS), and three-state parallel digital outputs (D11–D0) compatible with microprocessor buses. Input range selection is implemented via external resistor networks per AIN1/AIN2 configuration, not internal registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise analog measurement |
| Conversion Time | 3.125 µs (synchronous, 12.5 clocks @ 4MHz) - enables 320 kSPS maximum sampling rate |
| Integral Nonlinearity | ±1 LSB (0°C to +70°C) - ensures monotonicity and ≤0.024% full-scale error across operating temperature |
| Data Access Time | 125 ns (CL = 100 pF) - supports direct interface to 80Cxx, Z80, and similar µP buses without wait states in slow-memory mode |
| Supply Voltages | +5V VDD (±5%) and -12V VSS (±10%) - requires dual-rail biasing; no internal voltage regulation |
| Reference Input | -5V external reference (±10 mV tolerance) - buffered input draws only ±3 µA, allowing shared reference among multiple ADCs |
| Analog Input Ranges | PIN-SELECTABLE: 0 to +5V, 0 to +10V, or ±5V - configured externally via resistor network; no software control |
Pinout & Package
MX7672KN03 is housed in a 24-pin plastic dual in-line package (PDIP) with 0.3-inch width, RoHS-compliant (indicated by '+' suffix), and standard through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 15, 22 | N.C. | No connection - unused pins; must remain unconnected per datasheet |
| 2 | AIN1 | Analog input channel 1 - primary signal input; impedance ~5kΩ; referenced to AGND |
| 3 | VREF | External reference input - accepts -5V ±10 mV; buffered to minimize current draw (±3 µA) |
| 4 | AGND | Analog ground - star-ground connection point for all analog circuitry; isolated from DGND |
| 5–11 | D11–D4 | Three-state data outputs (MSB first) - active low CS+RD; D11 = MSB, D4 = bit 4 |
| 12 | DGND | Digital ground - return path for digital I/O; must connect to system digital ground plane |
| 13–16 | D3–D0 | Three-state data outputs (LSB group) - completes 12-bit parallel word; D0 = LSB |
| 17 | CLKIN | External clock input - accepts TTL-level signal; also connects to crystal/resonator for internal oscillator |
| 18 | CLKOUT | Internal oscillator output - inverted CLKIN when external clock used; open when crystal-driven |
| 19 | RD | Active-low read control - initiates conversion with CS; enables three-state drivers during read cycle |
| 20 | CS | Active-low chip select - initiates conversion with RD; enables output drivers and controls bus access |
| 21 | BUSY | Open-drain status indicator - low during conversion; used to synchronize sample-and-hold or µP wait states |
| 22 | VSS | Negative supply - -12V ±10%; absolute max -17V relative to DGND |
| 23 | VDD | Positive supply - +5V ±5%; absolute max +7V relative to DGND |
| 24 | AIN2 | Analog input channel 2 - used in bipolar ±5V mode (with AIN1); tied to +5V for bipolar offset reference |
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 | Draws only ±3 µA - allows one precision -5V reference to drive multiple MX7672KN03 devices with minimal error drift |
| Three selectable input ranges | 0–5V / 0–10V / ±5V - configured externally via resistor networks; no internal register writes required |
| Low power consumption | 110 mW typical (at +5V/-12V) - reduces thermal load in dense data-acquisition modules and embedded instrumentation |
| High-speed digital interface | 125 ns data-access time - eliminates need for glue logic when interfacing to 80C88, Z80, or 68000-based controllers |
Applications
| Telecommunications Baseband Processing | Sonar/Radar Signal Digitization |
|---|---|
Use Scenario: Digitizing IF signals from RF front-ends in cellular base stations and microwave transceivers requiring wide dynamic range and fast settling. IC Role / Device Role / Timing Role: High-speed 12-bit ADC performing real-time sampling of baseband analog waveforms prior to DSP processing. Use Value: 3µs conversion time and 125ns bus-access enable ≥320 kSPS throughput while maintaining ±1 LSB linearity for accurate spectral analysis. |
Use Scenario: Capturing pulsed echo returns in naval sonar arrays and airborne radar receivers where timing jitter and aperture uncertainty must be minimized. IC Role / Device Role / Timing Role: Precision ADC synchronizing acquisition to pulse repetition intervals using BUSY-driven sample-and-hold control. Use Value: Buffered -5V reference input and separate AGND/DGND pins reduce noise coupling, preserving SNR >70dB in high-gain receive chains. |
| Industrial Data-Acquisition Cards | PC-Based Test & Measurement I/O Boards |
Use Scenario: Modular DAQ systems in factory automation requiring multi-channel analog inputs with configurable voltage ranges and deterministic timing. IC Role / Device Role / Timing Role: Standalone ADC on PCIe or ISA carrier cards, accepting user-selected 0–5V, 0–10V, or ±5V inputs via front-panel jumpers. Use Value: Pin-selectable input ranges eliminate need for external gain-switching op-amps, reducing BOM count and board area. |
Use Scenario: Low-cost PC add-in cards for lab-grade voltage logging, sensor monitoring, and educational electronics experiments. IC Role / Device Role / Timing Role: Direct µP-interface ADC on ISA/PCI bus cards, leveraging RD/CS handshaking for simple polled or interrupt-driven reads. Use Value: 24-pin PDIP package and TTL-compatible I/O simplify prototyping and allow use with breadboard-friendly development platforms. |
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 |
|---|---|---|---|
| AD7672BNZ | Same 12-bit SAR architecture, 3µs conversion, but requires internal reference option or external +5V reference; higher typical power (135mW) | Designed for systems where reference sourcing flexibility is lower priority than legacy ADI ecosystem integration | Select AD7672BNZ only if existing designs already use AD7672 layout and reference topology; MX7672KN03 offers superior reference buffering and lower power. |
| MAX1166BCPP+ | 12-bit, 3µs conversion, but uses internal reference and single +5V supply; no negative rail support; smaller 20-pin SSOP package | Targeted at space-constrained, single-supply embedded systems where bipolar input and external reference are unnecessary | Choose MAX1166BCPP+ for compact, low-voltage designs; MX7672KN03 remains preferred for industrial/military applications needing ±5V input and -5V reference stability. |
Compared with AD7672BNZ and MAX1166BCPP+, the MX7672KN03 uniquely combines external -5V reference buffering, dual-supply operation (-12V/+5V), and guaranteed ±1 LSB INL over 0°C to +70°C in a through-hole PDIP package-making it optimal for rugged, high-accuracy data-acquisition upgrades.
Availability
MX7672KN03 is available at Aetrix Electronics and suitable for high-speed data-acquisition systems, radar/sonar signal digitization, and industrial PC I/O boards requiring stable component supply across extended temperature and long 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 precision ADC product line, designed specifically for applications demanding sub-µs conversion times, low power, and robust noise immunity in harsh electromagnetic environments.
FAQ
What is the maximum clock frequency supported by MX7672KN03?
The MX7672KN03 supports a maximum clock frequency of 4MHz for its specified 3µs conversion time. At this rate, conversion completes in exactly 12.5 clock cycles. Exceeding 4MHz violates timing specifications and may cause INL degradation or missed conversions. The device's CLKIN input is TTL-compatible and accepts clean square-wave or crystal-derived clocks.
Does MX7672KN03 require external components for basic operation?
Yes, MX7672KN03 requires several external components: a -5V precision reference connected to VREF, bypass capacitors (0.1µF ceramic + 10µF electrolytic) on VREF and power rails, and pull-up resistors on BUSY if used in open-drain configurations. Additionally, analog input filtering and proper AGND/DGND separation are mandatory per layout guidelines to achieve ±1 LSB performance.
Can MX7672KN03 operate with a single +5V supply?
No, MX7672KN03 cannot operate with only a +5V supply. It requires both +5V (VDD) and -12V (VSS) rails as specified in Absolute Maximum Ratings and Electrical Characteristics. Attempting operation with only +5V will result in functional failure, potential damage, and violation of the -17V minimum rating on VSS-to-DGND.
How is the analog input range selected on MX7672KN03?
The analog input range (0–5V, 0–10V, or ±5V) on MX7672KN03 is selected externally using resistor networks connected to AIN1 and AIN2, as shown in Figure 15 of the datasheet. There are no internal registers or digital commands for range selection - it is purely hardware-configured at board level, ensuring deterministic behavior without firmware dependencies.
Is MX7672KN03 pin-compatible with other MX7672 variants like MX7672KN05?
Yes, MX7672KN03 is fully pin-compatible with MX7672KN05 and MX7672KN10 - all share identical 24-pin PDIP packaging, pinout, and DC/AC electrical interface. The only differences are conversion time (3µs vs. 5µs vs. 10µs) and corresponding maximum clock frequencies (4MHz, 2.5MHz, 1.25MHz), making them direct drop-in replacements within the same temperature grade (0°C to +70°C).
MX7672KN03 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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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