AD7886JP

Overview

The AD7886JP is a 12-bit triple-pass flash Analog-to-Digital Converter (ADC) fabricated in LC2MOS technology. It operates from ±5 V power supplies and achieves throughput rates of 750 kHz or 1 MHz with conversion times of 1 μs or 750 ns, respectively. The device features pin-strappable analog input ranges: 0 V to 5 V, 0 V to 10 V, and ±5 V. It includes an on-chip clock oscillator, eliminating the need for external timing signals. Dynamic performance specifications include a Signal-to-Noise Ratio (SNR) of 65 dB minimum at a 100 kHz input frequency and a sampling rate of 750 kHz. The part utilizes standard microprocessor control signals (CS, RD, CONVST) and provides three-state data outputs.

Feature Summary

• Triple-pass flash architecture utilizing 15 comparators and a 4-bit flash technique to achieve 12-bit accuracy without missing codes over temperature.
• On-chip clock oscillator generates internal timing for all three conversion stages, removing the requirement for external clocks.
• Pin-strappable configuration allows selection among three distinct analog input voltage ranges using only a single +5 V supply.
• Fast bus access time enables direct interfacing with modern microprocessors and DSP systems via standard control signals.

Applications

• Digital Signal Processing
• Speech Recognition and Synthesis
• Spectrum Analysis
• DSP Servo Control

Procurement Notes

Verify the specific suffix 'JP' corresponds to the Plastic Leaded Chip Carrier package option when sourcing. Confirm the required operating temperature range matches the J version specifications (0 °C to +70 °C). Ensure that the design accommodates the dual ±5 V power supply requirements and the specific -3.5 V reference voltage configuration detailed in the datasheet.

Selection Notes

Select the AD7886JP for applications requiring high-speed 12-bit conversion with low power dissipation. Consider the 750 kHz or 1 MHz throughput based on system bandwidth needs. Verify compatibility with existing microprocessor interfaces due to the fast 57 ns data access time. Ensure the application can support the necessary ±5 V power rails and external reference circuitry.

Part Context

The AD7886 is part of Analog Devices' high-performance ADC portfolio, designed for demanding signal processing tasks. The JP variant specifically denotes the plastic leaded chip carrier package within the commercial temperature grade lineup. This component bridges the gap between speed and power efficiency, leveraging LC2MOS technology to combine precision bipolar circuits with low-power CMOS logic.

Replacement Considerations

The AD7886KD serves as a parameter-equivalent alternative offering improved SNR (67 dB) in the same D-28 ceramic DIP package. For package variations, the AD7886JD provides the same electrical characteristics as the JP but in a ceramic DIP format. Check availability for industrial (AD7886BD) and extended temperature (AD7886TD) grades if environmental conditions exceed the commercial range.