AD1671JP

Overview

The AD1671JP is a monolithic 12-bit, 1.25 MSPS analog-to-digital converter manufactured by Analog Devices Inc. It integrates a high-performance sample-and-hold amplifier (SHA) and an internal voltage reference within a 28-pin Plastic Leaded Chip Carrier (PLCC) package. The device utilizes a subranging flash conversion technique with digital error correction to ensure no missing codes over the full operating temperature range of 0°C to +70°C. It operates on ±5 V analog supplies and a +5 V digital supply, consuming 570 mW of power. The ADC supports pin-configurable input ranges including ±5 V, 0–5 V, ±2.5 V, and 0–2.5 V, providing flexibility for various signal conditioning applications.

Feature Summary

• 12-bit resolution with a throughput rate of 1.25 MSPS and conversion time of 800 ns
• Integrated on-chip sample-and-hold amplifier and 2.5 V voltage reference
• Subranging flash architecture with digital error correction for guaranteed linearity
• Pin-strappable input ranges: ±5 V, 0–5 V, ±2.5 V, and 0–2.5 V

Applications

• High-speed modems and digital radio transceivers
• Portable instrumentation requiring low power consumption
• Medical ultrasound equipment
• Software-defined radios and wireless infrastructure

Procurement Notes

Verify the specific suffix JP indicates the 28-PLCC plastic leaded chip carrier package configuration. Confirm that the J grade meets the required integral nonlinearity specifications of ±2.5 LSB for the intended application environment. Ensure compatibility with the specified ±5 V analog and +5 V digital supply rails during system design validation.

Selection Notes

Select the AD1671JP when a monolithic solution is preferred over hybrid implementations to reduce system cost and improve reliability. Choose this model if the application requires a 12-bit resolution at 1.25 MSPS with an integrated SHA and reference. Consider the 28-PLCC package constraints for surface-mount assembly processes and verify that the 0°C to +70°C commercial temperature range aligns with the operational requirements.

Part Context

The AD1671 series represents a family of complete 12-bit A/D converters available in multiple performance grades and packages. The AD1671J grade offers ±2.5 LSB linearity, while the AD1671K grade provides tighter ±2 LSB accuracy. Both are available in ceramic DIP (Q) and plastic PLCC (P) packages. The AD1671JP specifically denotes the J-grade device in the plastic surface-mount package, suitable for commercial volume production.

Replacement Considerations

The AD1671KP serves as the direct package alternative with identical electrical characteristics but higher accuracy (±2 LSB INL). For applications requiring extended temperature ranges, the AD1671AP or AD1671AQ may be considered, though they differ in thermal specifications rather than electrical performance.