AD7724ASTZ-REEL

ADCs/DACs - Special Purpose Overview

The AD7724ASTZ-REEL is a dual-channel, seventh-order sigma-delta modulator from Analog Devices Inc., housed in a 48-lead LQFP package. It operates with a master clock frequency up to 13 MHz and accepts differential analog inputs within a 0 V to +2.5 V or ±1.25 V range. The device features an on-chip 2.5 V reference and supports both unipolar and bipolar modes. Key static performance metrics include a typical integral nonlinearity of ±0.003% FSR and a gain error of ±0.6% FSR. Dynamic specifications provide a typical signal-to-(noise + distortion) ratio of 90 dB in bipolar mode. Power supplies require AVDD and DVDD at 5 V ± 5%, with DVDD1 supporting 3 V or 5 V logic compatibility.

ADCs/DACs - Special Purpose Feature Summary

• Dual seventh-order sigma-delta modulators with single-bit output streams
• On-chip 2.5 V voltage reference with external buffer capability
• Differential input ranges: 0 V to +2.5 V (unipolar) or ±1.25 V (bipolar)
• Master clock frequency up to 13 MHz for high-speed data conversion

ADCs/DACs - Special Purpose Applications

• High-resolution data acquisition systems requiring continuous sampling
• Industrial process control applications utilizing differential signal inputs
• Precision measurement equipment needing low noise and high dynamic range

ADCs/DACs - Special Purpose Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging when sourcing this specific variant. Confirm that the A version meets the required -40 °C to +85 °C operating temperature range. Ensure the design accommodates the 48-lead LQFP footprint and handles ESD precautions during assembly due to the device's sensitivity.

ADCs/DACs - Special Purpose Selection Notes

Select this component when dual independent modulators are required within a single package. The internal 2.5 V reference simplifies design if system accuracy tolerates its drift characteristics; otherwise, use REF1/REF2 pins for external references. Ensure the driving amplifier can settle within half the MCLK cycle to maintain specified linearity and gain accuracy.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7724 series of dual CMOS sigma-delta modulators. It is functionally similar to the AD7722 but provides two independent channels instead of one. The ASTZ designation specifies the industrial temperature range and lead-free construction within the standard LQFP-48 form factor used by Analog Devices for precision analog front-end components.

ADCs/DACs - Special Purpose Replacement Considerations

The AD7722 serves as a single-channel equivalent within the same family. For direct pin-compatible replacements, verify availability of other AD7724 variants such as the AD7724ARMZ. Cross-model substitution requires careful review of pin configurations and electrical specifications to ensure compatibility.