AD4170-4BCPZ-RL7

Overview

The AD4170-4BCPZ-RL7 is a 24-bit, low-noise precision Sigma-Delta analog-to-digital converter (ADC) from Analog Devices Inc. It features an input bandwidth of DC to 50 kHz and supports output data rates ranging from 7.6 SPS to 500 kSPS. The device integrates a programmable gain amplifier (PGA) with gains from 0.5 to 128, allowing direct connection of small amplitude signals. It offers four differential or eight pseudo-differential inputs within a 32-pin LFCSP package. Power requirements include 4.75 V to 5.25 V for analog supplies and 1.7 V to 5.25 V for digital supplies.

Feature Summary

• High precision AC/DC performance with RTI noise of 5.5 nV/√Hz at gain 128 and typical SNR of 110 dB
• Integrated low-noise PGA with gain range 0.5 to 128 and flexible digital filters including sinc and FIR options
• Configurable as four differential or eight pseudo-differential inputs with cross-point multiplexing
• Supports SPI, QSPI, Microwire, DSP, and TDM interfaces via 3-wire or 4-wire serial communication

Applications

• Industrial process control modules such as PLC and DCS systems
• Precision temperature and pressure measurement applications
• Multi-channel data acquisition systems requiring high resolution and low noise

Procurement Notes

Verify the specific suffix RL7 indicates tape and reel packaging when ordering. Confirm the BC sub-model designation matches the required pinout and electrical specifications against the official AD4170-4 datasheet. Ensure compatibility with the 32-LFCSP(4x6) footprint during PCB layout review.

Selection Notes

Select this component for applications requiring high accuracy with input frequencies up to 50 kHz. Consider the integrated PGA if signal conditioning amplification is needed before conversion. Verify that the system power rails align with the specified 4.75–5.25 V analog and 1.7–5.25 V digital supply ranges.

Part Context

This part belongs to the AD4170 family of precision ADCs designed for industrial sensing. The AD4170-4 variant specifically provides four differential channels. The BCZ suffix denotes the lead-free 32-LFCSP package, while RL7 specifies the reel quantity and packaging format for automated assembly.

Replacement Considerations

Consult the AD4170-4 datasheet for officially listed compatible replacements or updated revisions. Verify pin compatibility and register mapping if substituting with other members of the AD4170 series or similar high-resolution sigma-delta ADCs.