AD4170-4BCPZ

Analog To Digital Converters (ADC) Overview

The AD4170-4BCPZ is a 24-bit Sigma-Delta analog-to-digital converter (ADC) with a DC to 50 kHz input bandwidth. It features four differential or eight single-ended/pseudodifferential inputs, an integrated low-noise programmable gain amplifier (PGA) with gains from 0.5 to 128, and output data rates ranging from 7.6 SPS to 500 kSPS. The device includes an internal bandgap reference, excitation current sources, and a low-side power switch. It operates on analog supplies of 4.75 V to 5.25 V or ±2.5 V, and digital supplies of 1.7 V to 5.25 V. The component is housed in a 32-lead 4 mm × 6 mm LFCSP package.

Analog To Digital Converters (ADC) Feature Summary

• High precision AC/DC performance: Noise RTI 5.5 nV/√Hz at gain 128, INL ±0.5 ppm FSR, SNR 110 dB typical.
• Integrated signal chain: Includes PGA (0.5–128), internal reference (5 ppm/°C drift), excitation currents, and low-side power switches.
• Flexible digital filtering: Supports FIR filters with ±0.005 dB passband ripple, sinc filters, and simultaneous 50 Hz/60 Hz rejection.
• Advanced diagnostics: Features sensor burnout detection, signal chain checks, CRC protection, and overvoltage/undervoltage tolerant inputs.

Analog To Digital Converters (ADC) Applications

• Industrial process control modules (PLC/DCS)
• Temperature and pressure measurement systems
• High accuracy medical and scientific instrumentation
• Chromatography and seismic exploration equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging type and availability. Confirm that the required supply voltages match the specified ranges for both analog and digital domains. Ensure proper decoupling capacitors are used near the AVDD and IOVDD pins as detailed in the datasheet layout guidelines.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high channel count multiplexing with minimal external components. The integrated excitation currents and bridge power-down switches simplify RTD and strain gauge interfaces. Consider the available digital filter options if strict 50 Hz/60 Hz line frequency rejection is required without additional analog filtering stages.

Analog To Digital Converters (ADC) Part Context

The AD4170-4BCPZ belongs to the AD4170 family of precision analog front ends. It is designed to replace discrete solutions involving separate amplifiers, references, and ADCs, thereby reducing board space and design complexity. The 'BCPZ' suffix typically denotes the specific lead-free tape and reel or tray packaging variant within the LFCSP-32 form factor.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include other variants of the AD4170 series. Verify functional equivalence regarding input configuration and digital interface compatibility before substitution.

Analog To Digital Converters (ADC) FAQ

What is the maximum output data rate supported by the AD4170-4?

The device supports output data rates up to 500 kSPS when using the Sinc5 filter.

Can the AD4170-4 handle overvoltage conditions on inactive channels?

Yes, inactive analog inputs are tolerant to overvoltage and undervoltage conditions, allowing adjacent active channels to continue functioning correctly.

What types of digital filters are integrated into the ADC?

The device integrates low ripple FIR filters, user-programmable FIR filters, low latency sinc filters, and post-filters for simultaneous 50 Hz/60 Hz rejection.