HI3-674AKN-5

Analog To Digital Converters (ADC) Overview

The HI3-674AKN-5 is a complete 12-bit Analog-to-Digital Converter (ADC) manufactured by Renesas Electronics Corporation. It utilizes a Successive Approximation Register (SAR) architecture housed in a 28-lead Plastic Dual In-Line Package (PDIP). The device integrates a +10V reference, clock oscillator, and three-state digital outputs for direct microprocessor interfacing. It supports full 8-bit, 12-bit, or 16-bit bus interfaces with a maximum bus access time of 150ns. The component operates on supply voltages of +5V logic and ±12V to ±15V analog supplies, featuring an operating temperature range of 0°C to +75°C.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit SAR Architecture: Provides high-resolution conversion with guaranteed no missing codes over the operating temperature range.
• Integrated Reference and Clock: Includes a low-noise buried zener reference circuit and a current-controlled clock oscillator for stability.
• Microprocessor Interface: Features three-state outputs and byte enable/short cycle capabilities to eliminate bus contention.
• Dual Input Ranges: Supports standard unipolar (0V to +10V/+20V) and bipolar (-5V to +5V/-10V to +10V) input spans.

Analog To Digital Converters (ADC) Applications

• Military and Industrial Data Acquisition Systems
• Electronic Test and Scientific Instrumentation
• Process Control Systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'KN' indicates the K-grade linearity (±0.5 LSB INL) and N-package (PDIP). Confirm RoHS compliance status as the datasheet notes Pb-free options exist but requires checking the specific ordering code against current manufacturer lists. Ensure the source document matches the FN3096 revision for accurate timing parameters.

Analog To Digital Converters (ADC) Selection Notes

Select the HI3-674AKN-5 when a 12-bit resolution with ±0.5 LSB integral nonlinearity is required for through-hole mounting. Compare conversion times against the HI-574A variant; this model offers faster typical conversion speeds (12µs vs 20µs). Ensure the application can accommodate the ±12V to ±15V analog supply requirements and the specific pinout layout for the 28-lead PDIP package.

Analog To Digital Converters (ADC) Part Context

This component belongs to the HI-X74(A) family of complete A/D converters. It is functionally similar to the HI-574A series but distinguished by its internal clock speed and conversion time specifications. The part number structure identifies the manufacturer prefix (HI), the base model (674), the grade (K for ±0.5 LSB), the package type (N for PDIP), and the temperature/supply suffix (5 for commercial grade).

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet explicitly recommends the ISL263XX and ISL267XX families as possible substitute products. These modern alternatives offer serial interfaces and lower power consumption but require significant schematic redesign due to interface differences.