AD1674JNZ

Overview

The AD1674JNZ is a complete monolithic 12-bit analog-to-digital converter manufactured by Analog Devices Inc. It integrates an onboard sample-and-hold amplifier (SHA), a 10 V reference, clock circuitry, and three-state output buffers for microprocessor interfacing. The device operates with +5 V logic supply and ±12 V or ±15 V analog supplies. Key electrical specifications include a sampling rate of 100 kSPS, a full-power bandwidth of 1 MHz, and integral nonlinearity of ±1 LSB. It supports unipolar input ranges of 0 V to +10 V and 0 V to +20 V, as well as bipolar ranges of ±5 V and ±10 V.

Feature Summary

• Integrated SHA supporting full Nyquist bandwidth without requiring wait-states
• Industry standard pinout compatible with AD574A and AD674A
• Flexible digital interface with 8- and 12-bit parallel data output options
• On-chip 10 V reference with external reference capability

Applications

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

Procurement Notes

Verify the specific temperature grade and package configuration when ordering. The 'J' suffix indicates operation from 0 °C to +70 °C. Confirm that the DIP-28 plastic package matches the design requirements. Ensure power supply rails are within the specified operating voltages of +11.4 V to +16.5 V for VCC and -16.5 V to -11.4 V for VEE.

Selection Notes

Select the AD1674JNZ for applications requiring 12-bit resolution at 100 kSPS with integrated signal conditioning. Choose this model over other grades if the operating environment stays within the commercial temperature range of 0 °C to +70 °C. Consider the K-grade variant if tighter integral nonlinearity specifications of ±1/2 LSB are required.

Part Context

The AD1674 belongs to the AD1674 series of 12-bit ADCs. The JNZ designation specifically refers to the J-grade device in a Plastic DIP-28 package. Other variants include the KNZ (K-grade, Plastic DIP) and JR/R-series (SOIC packages). The device is implemented using BiMOS II process technology.

Replacement Considerations

The AD1674 is pin-compatible with the AD574A and AD674A. When replacing legacy components, verify that the system timing accommodates the AD1674's conversion characteristics. No direct cross-manufacturer substitutes are listed in the provided documentation.