AD9852ASTZ

Overview

The AD9852ASTZ is a complete Direct Digital Synthesis (DDS) digital synthesizer manufactured by Analog Devices Inc. It features a 300 MHz internal clock rate and dual integrated 12-bit D/A converters. The device supports FSK, BPSK, PSK, chirp, and AM operations with an ultrahigh speed comparator exhibiting 3 ps rms jitter. It provides excellent dynamic performance, achieving 80 dB SFDR at 100 MHz output. Key specifications include a 4× to 20× programmable reference clock multiplier, dual 48-bit programmable frequency registers, and dual 14-bit programmable phase offset registers. It operates on a single 3.3 V supply within the -40°C to +85°C temperature range.

Feature Summary

• Supports multiple modulation modes including FSK, BPSK, PSK, chirp, and AM via dedicated interfaces.
• Integrates dual 12-bit DACs and a high-speed comparator for agile clock generation and signal synthesis.
• Features a programmable reference clock multiplier allowing system clock generation from lower frequency inputs.
• Includes advanced functions such as automatic bidirectional frequency sweeping and sin(x)/x correction.

Applications

• Agile local oscillator frequency synthesis
• Programmable clock generator
• FM chirp source for radar and scanning systems
• Test and measurement equipment
• Commercial and amateur RF exciter

Procurement Notes

Verify the specific suffix ASTZ confirms the 200 MHz maximum clock frequency variant, distinct from the ASVZ 300 MHz version. Confirm package type matches LQFP-80 requirements. Ensure thermal management guidelines are followed due to exposed pad design. Check RoHS compliance status against current manufacturing revisions.

Selection Notes

Select this component when a 200 MHz maximum system clock is sufficient for the application. Compare against AD9852ASVZ if higher frequency operation up to 300 MHz is required. Consider the 80-lead LQFP package constraints and thermal dissipation needs. Verify interface compatibility with serial or parallel programming requirements.

Part Context

The AD9852ASTZ belongs to the AD9852 series of DDS synthesizers. It is pin-for-pin compatible with the AD9854 single-tone synthesizer. The ASTZ suffix denotes the industrial temperature grade (-40°C to +85°C) and the 200 MHz maximum clock frequency specification. It utilizes 0.35 μm CMOS technology.

Replacement Considerations

AD9852ASVZ offers identical functionality but supports a higher maximum clock frequency of 300 MHz. AD9854 is pin-compatible but designed as a single-tone synthesizer without the dual-channel capabilities of the AD9852.

FAQ

What is the difference between AD9852ASTZ and AD9852ASVZ?

The primary difference is the maximum internal system clock frequency. The AD9852ASTZ is rated for a maximum of 200 MHz, while the AD9852ASVZ supports up to 300 MHz. Both share the same package and pinout.

How is the system clock generated in the AD9852ASTZ?

The device includes a programmable 4× to 20× REFCLK multiplier that can generate the internal system clock from a lower frequency external reference clock. Direct 300 MHz clocking is also supported via single-ended or differential inputs.

What modulation formats does the AD9852ASTZ support?

It supports FSK, BPSK, PSK, chirp, and AM operations. Single-pin interfaces are provided for FSK and BPSK data, while PSK capability is available via the I/O interface.