AD9945KCPZ vs AD9944KCPZ

Cette comparaison détaillée des composants AD9945KCPZ et AD9944KCPZ vous offre un aperçu précieux de leurs spécifications et caractéristiques clés. Nous abordons en détail les facteurs importants, notamment la conformité RoHS, le statut REACH, la série, le mode de montage, le type de boîtier et d'autres caractéristiques pertinentes. La présentation côte à côte des différences simplifie la sélection des composants et vous permet de choisir plus facilement la meilleure option pour votre application spécifique.

Technical review by ETEI Component Engineering Source: manufacturer documentation

Replacement verdict

Compatible functional replacement candidate

The AD9945KCPZ and AD9944KCPZ are closely related analog front-end (AFE) signal processors from the same Analog Devices family, sharing a common 32-lead LFCSP footprint and core architecture. The AD9945KCPZ offers a higher maximum pixel conversion rate, making it a viable functional upgrade candidate for the AD9944KCPZ in most imaging designs, provided the system timing and clock budget are validated against the higher throughput specification.

Package Type High match
Supply Voltage High match
Maximum Pixel Conversion Rate Validation required
Operating Temperature Range High match

Review the critical differences →

Parts at a glance

Key differences

Rows are prioritized by design impact. Highlighted values require attention during substitution.

Key electrical and mechanical differences between the two devices

Parameter AD9945KCPZ AD9944KCPZ Why it matters
Resolution (ADC bits) 12 bit 12 bit Both are 12-bit ADCs, so quantization precision is equivalent for imaging signal chains.
Maximum Conversion Rate 40 MSPS 25 MSPS Higher sample rate supports faster pixel clocks and higher-resolution or higher-frame-rate sensors.
Number of ADC Channels 1 1 Single-channel architecture determines how many sensor outputs can be digitized simultaneously.
Input Signal Range 2 V p-p (typical) 2 V p-p (typical) Matching input range ensures comparable sensor signal swing compatibility.
Supply Voltage 3.0 V to 3.6 V (analog/digital) 3.0 V to 3.6 V (analog/digital) Same supply requirements allow drop-in power design reuse.
Package 32-Lead LFCSP 32-Lead LFCSP Identical package and pinout enable board-level interchangeability.
On-chip Correlated Double Sampling (CDS) Yes Yes CDS reduces reset noise and is essential for CCD/CMOS sensor signal conditioning.
Programmable Gain Amplifier (PGA) Range 6 dB to 42 dB 6 dB to 42 dB Gain range affects ability to match sensor output to ADC full scale under varying illumination.
Operating Temperature Range -20°C to +85°C -20°C to +85°C Same temperature range supports equivalent environmental robustness in imaging systems.

Need help validating a replacement?

Send your BOM and application constraints for technical and sourcing review.

Demande de devis Contact technical support

Full specification comparison

Use manufacturer datasheets as the final authority.

Specification AD9945KCPZ AD9944KCPZ
Supplier - Rochester Electronics, LLC,Analog Devices Inc.
Part Status Active Active
Type CCD Signal Processor, 12-Bit CCD Signal Processor, 12-Bit
Input Type Logic Logic
Output Type Logic Logic
Operating Temperature -20°C ~ 85°C -20°C ~ 85°C
Mounting Type Surface Mount Surface Mount

Frequently asked questions

What are the key differences between the AD9945KCPZ and AD9944KCPZ?

Both are complete 12-bit CCD signal processors from Analog Devices in a 32-lead LFCSP package. The primary difference is their maximum sampling rate: the AD9945KCPZ supports up to 40 MSPS, while the AD9944KCPZ supports up to 25 MSPS. The AD9945 also offers a higher pixel gain range and faster internal timing, making it suitable for higher-speed CCD applications.

Are the AD9945KCPZ and AD9944KCPZ pin-compatible?

Yes. Both devices are offered in the same 32-lead LFCSP (CP-32) package with identical pin functions, allowing the AD9945KCPZ to be used as a drop-in replacement for the AD9944KCPZ in existing layouts, provided the higher sampling rate and timing are acceptable for the design.

What is the maximum sampling rate of each device?

The AD9945KCPZ is specified for a maximum clock rate of 40 MSPS, while the AD9944KCPZ is specified for a maximum clock rate of 25 MSPS. Designs requiring pixel rates above 25 MSPS must use the AD9945KCPZ.

Do both parts provide the same ADC resolution and analog front-end features?

Yes. Both integrate a 12-bit ADC, a correlated double sampler (CDS), a programmable gain amplifier (PGA), and a black level clamp. Both also include an on-chip timing generator and support 3-wire serial interface control, so the core signal-processing architecture is identical.

What supply voltages do the AD9945KCPZ and AD9944KCPZ require?

Both devices operate from a single 3.0 V to 3.6 V analog supply (AVDD) and a 2.7 V to 3.6 V digital supply (DVDD), with separate supplies for the analog and digital sections to reduce noise coupling. The I/O supply (DRVDD) is also nominally 3.0 V to 3.6 V.

Can the AD9944KCPZ be replaced by the AD9945KCPZ without firmware changes?

In most cases yes, because both share the same register map and 3-wire serial interface. However, the system clock and timing registers must be re-validated, since the AD9945KCPZ supports higher clock rates and its internal timing parameters differ. Always confirm register settings against the respective datasheets.

Which part is better suited for high-resolution CCD imaging?

The AD9945KCPZ is better suited for high-resolution or high-frame-rate CCD imaging because its 40 MSPS maximum rate supports higher pixel throughput. The AD9944KCPZ at 25 MSPS is adequate for lower-speed CCD sensors and standard-resolution applications.

What is the operating temperature range for both devices?

Both the AD9945KCPZ and AD9944KCPZ are specified over the industrial temperature range of −40°C to +85°C, making them suitable for industrial and commercial imaging equipment.

Compare Demande de devis