AD1674JN

Overview

The AD1674JN is a monolithic 12-bit analog-to-digital converter (ADC) featuring an onboard sample-and-hold amplifier (SHA), internal reference, and three-state output buffers. It operates with +5 V logic supply and ±12 V or ±15 V analog supplies. The device supports unipolar (0–10 V, 0–20 V) and bipolar (±5 V, ±10 V) input ranges via calibrated scaling resistors. Key specifications include a 100 kSPS sampling rate, 1 MHz full-power bandwidth, and ±1 LSB integral nonlinearity. It utilizes a parallel interface compatible with industry-standard pinouts.

Feature Summary

• Integrated SHA supporting full Nyquist bandwidth without additional wait-states
• Industry standard pinout compatible with AD574A and AD674A
• Calibrated input ranges: 0–10 V, 0–20 V, ±5 V, and ±10 V
• Parallel digital interface with three-state output buffers

Applications

• Signal processing systems requiring AC and DC specifications
• Traditional DC measurement applications
• Industrial control systems with dedicated input ports

Procurement Notes

Verify the specific suffix 'N' indicates the plastic DIP-28 package. Confirm the temperature grade 'J' corresponds to the commercial range of 0°C to +70°C. Ensure power supply requirements match the specified ±12 V/±15 V analog and +5 V logic rails for proper operation within the stated performance parameters.

Selection Notes

Select the AD1674JN when a 12-bit resolution at 100 kSPS is required with integrated signal conditioning. The device is suitable for designs needing direct microprocessor interfacing via its parallel bus. Consider the thermal dissipation limits (385 mW typical) and ensure adequate heat sinking if operating near maximum power ratings in enclosed environments.

Part Context

The AD1674 series includes multiple temperature grades and packages. The J grade is specified for commercial temperatures (0°C to +70°C). The N suffix denotes the 28-lead plastic DIP package. Other variants include the K grade for higher linearity, A/B grades for industrial temperatures, and T grade for military temperatures, available in ceramic DIP or SOIC packages.

Replacement Considerations

The AD1674 is pin-compatible with the AD574A and AD674A. When substituting, verify that the replacement device supports the required 12-bit resolution and 100 kSPS speed. Ensure the new component accommodates the same ±12 V/±15 V analog supply voltages and +5 V logic levels.