Analog Devices Inc./Maxim Integrated MX7672KN10+

Overview

MX7672KN10+ from Maxim Integrated is a 12-bit, high-speed BiCMOS analog-to-digital converter with 10µs maximum conversion time, ±1 LSB integral nonlinearity (INL), and 125ns bus-access time. It operates from +5V and -12V supplies, accepts an external -5V reference, and supports pin-selectable input ranges of 0 to +5V, 0 to +10V, or ±5V. It is used in high-speed data-acquisition systems requiring precise timing and low power (110mW).

For engineers reviewing the MX7672KN10+ datasheet, MX7672KN10+ pinout, MX7672KN10+ application, or MX7672KN10+ equivalent, key selection considerations include its 10µs conversion speed grade, PDIP-24 package, ±1 LSB INL over 0°C to +70°C, buffered reference input for multi-ADC sharing, and compatibility with microprocessor-based I/O boards using slow-memory or ROM interface modes.

Technical Context

The MX7672KN10+ employs successive approximation register (SAR) architecture with internal DAC and comparator, initiating conversion on the falling edge of CS and RD. Its clock can be driven externally at 1.25MHz or generated internally via crystal between CLKIN/CLKOUT.

It features separate analog (AGND) and digital (DGND) grounds, buffered VREF input minimizing current draw (<±3µA), and three-state parallel digital outputs (D11–D0) compatible with TTL-level microprocessors. Conversion timing is fixed at 12.5 clock cycles when RD is synchronized to CLKIN rising edge.

Key Specifications

Pinout & Package

MX7672KN10+ is housed in a 24-pin plastic dual in-line package (PDIP) with 0.3-inch body width and through-hole mounting. Pin 1 is marked with a notch or dot; pin numbering follows standard counter-clockwise convention from top view.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed 12-bit ADC applications.

Compared with AD7672KPZ, MX7672KN10+ reduces reference current by >97% and eliminates ±15V rails, lowering system power and complexity; versus MAX1167BCAP+, it retains critical external reference and bipolar input capabilities essential for calibrated industrial instrumentation.

Availability

MX7672KN10+ is available at Aetrix Electronics and suitable for high-speed data-acquisition systems, telecommunications baseband processing, and PC-based test & measurement I/O requiring stable component supply and long-term obsolescence management.

Supply support for MX7672KN10+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The MX7672KN10+ belongs to Maxim's high-speed precision ADC product line, designed specifically for applications demanding sub-10µs conversion latency, low power, and flexible analog input configurations in harsh or space-constrained environments.

FAQ

What is the maximum clock frequency supported by MX7672KN10+?

The MX7672KN10+ supports a maximum clock frequency of 1.25MHz, corresponding to its 10µs conversion time grade. This clock may be supplied externally to CLKIN or generated internally using a crystal/resonator between CLKIN and CLKOUT. Operation above 1.25MHz violates timing specifications and risks non-monotonic output or missing codes.

Does MX7672KN10+ require external components for stable operation?

Yes, MX7672KN10+ requires external bypass capacitors: 0.1µF and 10µF ceramic/electrolytic pairs from VDD and VSS to AGND, plus 10µF + 0.1µF on VREF. A crystal or external clock source is needed for CLKIN, and a precision -5V reference must be provided. These are mandatory for achieving ±1 LSB INL and 110mW power consumption.

Can MX7672KN10+ operate in bipolar (±5V) input mode without additional op-amps?

Yes, MX7672KN10+ supports true bipolar ±5V input mode natively using AIN1 for signal and AIN2 for +5V reference, with VREF set to -5V. No external op-amps are required for range selection - only proper biasing of AIN2 and VREF. However, offset/gain trimming circuits (e.g., Figure 19) are recommended for production calibration.

Is MX7672KN10+ pin-compatible with other MX7672 speed grades?

Yes, MX7672KN10+ is fully pin-compatible with all other MX7672 variants in the 24-pin PDIP package (e.g., MX7672KN03+, MX7672KN05+). The only differences are conversion time (3µs/5µs/10µs), INL grade (±1/±½/±¾ LSB), and temperature range - all share identical pinout, electrical interface, and timing protocol.

How does the BUSY signal function during conversion in MX7672KN10+?

In MX7672KN10+, the BUSY signal goes low at the falling edge of CS and RD, remains low for the full 10µs conversion period (12.5 clock cycles at 1.25MHz), then returns high to indicate result readiness. BUSY is open-drain and must be pulled up externally; it can directly control external sample-and-hold TRACK/HOLD or generate µP wait states in slow-memory mode.