Part A
AD9852ASVZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5594 Stückzahl
- Package
- TQFP-80
- Series
- Schnittstelle für digitale Synthese (DDS)
Replacement verdict
Compatible functional replacement candidate
The AD9854ASVZ and AD9852ASVZ are both complete direct digital synthesizers in the same 80-lead LQFP package with identical supply and temperature ratings, making the AD9854ASVZ a viable functional upgrade candidate for AD9852ASVZ designs. The primary distinction is the AD9854ASVZ's higher maximum clock rate and dual integrated 12-bit DACs versus the AD9852ASVZ's single DAC, so firmware, output filtering, and board-level signal routing must be validated before substitution.
Package Type
High match
Supply Voltage
High match
Maximum Clock Frequency
Validation required
DAC Channel Count
Not compatible
Parts at a glance
Part B
AD9854ASVZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2038 Stückzahl
- Package
- TQFP-80
- Series
- Schnittstelle für digitale Synthese (DDS)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9854ASVZ | AD9852ASVZ | Why it matters |
|---|---|---|---|
| Resolution (DAC Bits) | 12 bit | 12 bit | Both use 12-bit DACs, so output spectral purity and quantization noise performance are comparable. |
| Maximum Clock Frequency | 300 MHz | 300 MHz | System clock sets the maximum synthesizable output frequency and update rate; identical clocks mean similar frequency range. |
| Number of Synchronized Outputs | Dual (I and Q) outputs | Dual (I and Q) outputs | Both provide quadrature outputs, enabling I/Q modulation and complex signal generation in either part. |
| On-Chip Comparator | Yes (integrated high-speed comparator) | Yes (integrated high-speed comparator) | An integrated comparator allows square-wave/clock generation without external circuitry in both devices. |
| On-Chip PLL Multiplier | 4x to 20x REFCLK multiplier | 4x to 20x REFCLK multiplier | The PLL multiplier lets a lower-frequency reference clock drive the high-speed core; identical ranges mean the same reference clocking options. |
| Supply Voltage | 3.3 V | 3.3 V | Matching supply voltage means the same power rail design and level compatibility for both parts. |
| Package | 80-lead TQFP (SV) | 80-lead TQFP (SV) | Identical package and pin count allow a common PCB footprint and potentially drop-in layout compatibility. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Same industrial temperature range means equivalent environmental suitability for both devices. |
| Interface | Parallel (8-bit) and serial (SPI-compatible) control | Parallel (8-bit) and serial (SPI-compatible) control | Identical control interfaces allow the same host microcontroller and firmware protocol to drive either part. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9852ASVZ | AD9854ASVZ |
|---|---|---|
| Part Status | Active | Active |
| Resolution(Bits) | 12 b | 12 b |
| Masterfclk | 300 MHz | 300 MHz |
| Tuning Word Width(Bits) | 48 b | 48 b |
| Voltage - Supply | 3.14V ~ 3.47V | 3.14V ~ 3.47V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD9854ASVZ and AD9852ASVZ DDS ICs?
Both are direct digital synthesizers in 80-lead TQFP packages (SVZ suffix) from Analog Devices. The AD9854ASVZ provides two integrated 12-bit DACs with a maximum update rate of 300 MSPS, while the AD9852ASVZ provides two 12-bit DACs with a maximum update rate of 300 MSPS as well but differs in on-chip features: the AD9854 includes a 300 MSPS quadrature DAC pair supporting I/Q outputs and a 48-bit frequency tuning word, whereas the AD9852 offers a 48-bit frequency tuning word with dual integrated DACs but without the same I/Q quadrature output architecture. Designers should consult the respective datasheets for exact register maps and feature sets.
Are the AD9854ASVZ and AD9852ASVZ pin-compatible?
Both devices are offered in the same 80-lead TQFP (SVZ) package, but pin compatibility cannot be assumed solely from package similarity. Pin functions and register interfaces differ between the AD9854 and AD9852 families, so a direct drop-in replacement is not supported without verifying pin assignments against both datasheets.
What is the maximum DAC update rate for each device?
The AD9854ASVZ supports a maximum DAC update rate of 300 MSPS. The AD9852ASVZ also supports a maximum DAC update rate of 300 MSPS. Both use integrated 12-bit DACs, but the AD9854 adds quadrature (I/Q) output capability that the AD9852 does not provide in the same configuration.
Do both parts support I/Q quadrature outputs?
The AD9854ASVZ includes dual 12-bit DACs configured to provide quadrature I/Q outputs, making it suitable for applications requiring complex signal generation. The AD9852ASVZ provides dual DACs but is not specified with the same quadrature I/Q output architecture. Verify the output configuration in the respective datasheets before selecting for I/Q applications.
What frequency tuning word resolution do these DDS devices offer?
Both the AD9854ASVZ and AD9852ASVZ use a 48-bit frequency tuning word, providing fine frequency resolution at their respective system clock rates. The exact resolution in Hz depends on the applied system clock, so designers should calculate resolution as fCLK / 2^48 for each implementation.
Can the AD9852ASVZ be used as a substitute for the AD9854ASVZ?
Substitution is not recommended without full validation. Although both are 80-lead TQFP DDS devices with 300 MSPS 12-bit DACs and 48-bit tuning words, the AD9854ASVZ offers quadrature I/Q output capability and a different feature set. Register maps, output architecture, and pin functions must be compared against both datasheets, and the target design must be revalidated before any substitution.
What package do the AD9854ASVZ and AD9852ASVZ use?
Both devices are supplied in an 80-lead TQFP (Thin Quad Flat Pack) package, indicated by the SVZ suffix in the part number. The SVZ suffix also denotes the RoHS-compliant lead-free version per Analog Devices ordering conventions. PCB land patterns should be verified against the manufacturer datasheet for each part.