AD4684BCPZ-RL7

Analog To Digital Converters (ADC) Overview

The AD4684BCPZ-RL7 is a 16-bit, dual, simultaneous sampling successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices. It features four single-ended analog input channels with integrated 2:1 multiplexers and operates at a throughput rate of 1 MSPS. The device utilizes a standard SPI-compatible serial interface and supports logic voltages from 1.65 V to 3.6 V. Key performance metrics include a typical signal-to-noise ratio (SNR) of 87.5 dB with an external 3.3 V reference and an integral nonlinearity (INL) of ±1.5 LSB. It incorporates an on-chip 2.5 V internal reference and an oversampling block for dynamic range enhancement. The component is housed in a 16-lead, 3 mm × 3 mm LFCSP package and is rated for operation between −40°C and +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Dual simultaneous sampling architecture with 4 single-ended channels and 2:1 multiplexers
• High-speed data conversion at 1 MSPS throughput with 16-bit resolution
• Integrated oversampling block and channel sequencer for improved dynamic range
• On-chip buffered 2.5 V reference or support for external references up to 3.3 V

Analog To Digital Converters (ADC) Applications

• Motor control position feedback
• Motor control current sense
• Sonar systems
• Power quality monitoring
• Data acquisition systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix RL7 corresponds to the reel packaging configuration as specified in the manufacturer's documentation. Confirm that the specific variant matches the required throughput rate, as the AD4685 variant operates at 500 kSPS. Ensure compatibility with the system's power supply rails and logic voltage levels before integration.

Analog To Digital Converters (ADC) Selection Notes

Select this component when dual-channel simultaneous sampling is required for high-speed applications. The AD4684 provides 1 MSPS throughput, whereas the AD4685 offers 500 kSPS. Consider the internal 2.5 V reference if external precision references are not available, noting that external references up to 3.3 V can be used for higher dynamic range. The LFCSP-16 package is suitable for space-constrained designs.

Analog To Digital Converters (ADC) Part Context

The AD4684BCPZ-RL7 belongs to the AD4684/AD4684 family of high-performance SAR ADCs. It is pin-compatible with the AD4685, which shares the same package and interface but operates at a lower maximum sampling rate. This family is designed for applications requiring precise, simultaneous multi-channel data acquisition with low latency and high linearity.

Analog To Digital Converters (ADC) Replacement Considerations

The AD4685 is a pin-compatible alternative within the same family, offering identical functionality but with a reduced throughput rate of 500 kSPS compared to the 1 MSPS of the AD4684.