AD1674KR

Overview

The AD1674KR is a monolithic 12-bit analog-to-digital converter manufactured by Analog Devices Inc. It operates within the commercial temperature range of 0°C to +70°C and utilizes a plastic SOIC-28 package. The device integrates a user-transparent sample-and-hold amplifier (SHA), an internal 10V reference, clock circuitry, and three-state output buffers. Designed for microprocessor interfaces, it supports both 8-bit and 16-bit data formats with parallel output. Key electrical specifications include a sampling rate of 100 kSPS, a full-power bandwidth of 1 MHz, and an integral nonlinearity (INL) of ±1/2 LSB. Power consumption ranges from 385 mW to 575 mW depending on supply conditions.

Feature Summary

• Integrated Sample-and-Hold Amplifier supporting full Nyquist bandwidth without additional wait-states
• Industry standard pinout compatible with AD574A and AD674A
• Flexible digital interface supporting 8-bit and 12-bit data formats via three-state buffers
• Calibrated input ranges including ±5 V, ±10 V, 0–10 V, and 0–20 V

Applications

• Signal processing systems requiring AC and DC specifications
• Traditional DC measurement applications
• Microprocessor-based data acquisition systems

Procurement Notes

Verify the specific suffix 'KR' corresponds to the Plastic SOIC R-28 package and the 0°C to +70°C temperature grade as defined in the ordering guide. Confirm that the required INL specification matches the ±1/2 LSB typical value associated with this grade. Ensure power supply rails align with the specified operating voltages of VCC (+11.4 V to +16.5 V) and VEE (-16.5 V to -11.4 V).

Selection Notes

Select the AD1674KR when a 12-bit resolution with 100 kSPS throughput is required in a surface-mount format. This model is suitable for designs needing direct compatibility with legacy AD574A/AD674A footprints while offering improved conversion speed due to the onboard SHA. Consider the ±1/2 LSB INL performance for precision applications within the commercial temperature range.

Part Context

The AD1674 series comprises multiple temperature grades and package options. The 'K' designation indicates the commercial grade (0°C to +70°C) with ±1/2 LSB INL. The 'R' suffix denotes the plastic SOIC package. Other variants include the 'J' grade (±1 LSB INL), 'A/B' grades (-40°C to +85°C), and 'T' grade (-55°C to +125°C) in ceramic DIP packages.

Replacement Considerations

The AD1674KR is pin-compatible with the AD574A and AD674A. For equivalent performance within the same family, the AD1674KNZ offers the same K-grade specifications in a PDIP package.