Part A
AD9945KCPZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5858 PCS
- Package
- WFQFN-32
- Series
- Interface - interface pour capteurs et détecteurs
Replacement verdict
Compatible functional replacement candidate
The AD9945KCPZ and AD9943KCP are both complete 12-bit CCD signal processors from Analog Devices in the same 32-lead LFCSP package, sharing core architecture, supply requirements, and serial interface. The AD9945KCPZ offers a higher maximum pixel clock rate, making it the more capable variant, while the AD9943KCP remains a viable functional substitute where the lower clock ceiling is acceptable. Pin-level and timing verification against the target design is recommended before substitution.
Package Type
High match
Resolution
High match
Maximum Pixel Clock Rate
Validation required
Supply Voltage
High match
Parts at a glance
Part B
AD9943KCP
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2332 PCS
- Package
- WFQFN-32
- Series
- Interface - interface pour capteurs et détecteurs
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 | AD9943KCP | Why it matters |
|---|---|---|---|
| Resolution (ADC Bits) | 12 bit | 10 bit | Higher bit depth provides greater dynamic range and finer quantization, directly affecting image quality and low-light performance. |
| Maximum Conversion Rate | 40 MSPS | 25 MSPS | Determines the maximum pixel throughput and thus the highest supported sensor resolution/frame rate. |
| Number of ADC Channels | 1 | 1 | Single-channel architecture defines the signal path topology and how many sensor outputs can be processed simultaneously. |
| Supply Voltage (Analog/Digital) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Confirms power-rail compatibility so the part can drop into the same board supply without redesign. |
| Package Type | 32-Lead LFCSP | 32-Lead LFCSP | Identical package and footprint enable direct PCB drop-in replacement without layout changes. |
| Operating Temperature Range | -20°C to +85°C | -20°C to +85°C | Matching temperature ratings ensure equivalent environmental robustness for the target application. |
| Integrated Correlated Double Sampler (CDS) | Yes | Yes | CDS removes reset noise from CCD pixels; both having it means equivalent noise-reduction capability. |
| Programmable Gain Amplifier (PGA) Range | 6 dB to 42 dB | 6 dB to 42 dB | Gain range sets the ability to normalize varying illumination levels before digitization. |
| Output Interface | Parallel CMOS | Parallel CMOS | Same digital output format allows direct connection to the same downstream image processor or DSP. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9945KCPZ | AD9943KCP |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | CCD Signal Processor, 12-Bit | CCD Signal Processor, 10-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 the AD9943KCP?
The AD9945KCPZ is a complete 12-bit, 40 MSPS analog front end (AFE) for CCD imaging applications, while the AD9943KCP is a 10-bit, 25 MSPS AFE in the same family. The AD9945 offers higher resolution and a faster conversion rate, making it suitable for higher-performance imaging systems, whereas the AD9943 targets lower-cost, lower-speed applications.
Are the AD9945KCPZ and AD9943KCP pin-compatible?
Both devices are offered in a 32-lead LFCSP package, but pin compatibility must be confirmed against the respective manufacturer datasheets before substitution. The AD9945KCPZ and AD9943KCP share the same package footprint, yet differences in pin functions or external component requirements may exist and should be verified.
What is the maximum sampling rate of each device?
The AD9945KCPZ supports a maximum conversion rate of 40 MSPS, while the AD9943KCP supports up to 25 MSPS. The higher throughput of the AD9945KCPZ makes it better suited for high-speed CCD imaging applications.
What resolution does each AFE provide?
The AD9945KCPZ provides 12-bit analog-to-digital conversion, whereas the AD9943KCP provides 10-bit conversion. The 12-bit resolution of the AD9945KCPZ offers greater dynamic range and finer quantization for demanding imaging applications.
Do both parts include a correlated double sampler (CDS) and programmable gain amplifier (PGA)?
Yes, both the AD9945KCPZ and AD9943KCP integrate a correlated double sampler, a programmable gain amplifier, and a black level clamp, which are standard building blocks for CCD signal processing. These integrated functions reduce external component count in imaging designs.
What supply voltage do the AD9945KCPZ and AD9943KCP require?
Both devices operate from a single 3 V analog supply, with separate digital supply pins for interfacing. Designers should consult the official datasheets for the exact recommended supply ranges and decoupling requirements.
Can the AD9943KCP be used as a drop-in replacement for the AD9945KCPZ?
No, the AD9943KCP should not be treated as a drop-in replacement for the AD9945KCPZ. The lower 10-bit resolution and 25 MSPS maximum rate of the AD9943KCP may not meet the performance requirements of a design built around the 12-bit, 40 MSPS AD9945KCPZ, and register maps or timing may differ.
What are the typical applications for these AFEs?
Both the AD9945KCPZ and AD9943KCP are intended for CCD imaging signal chains, including digital still cameras, camcorders, and industrial or medical imaging systems. The AD9945KCPZ is preferred where higher resolution and speed are required, while the AD9943KCP suits cost-sensitive, lower-speed designs.