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 AD9943KCPZRL are both complete 12-bit CCD signal processors from Analog Devices in the same 32-lead LFCSP package, sharing identical core architecture, supply requirements, and serial interface. The AD9945KCPZ offers a higher maximum sampling rate (40 MSPS versus 25 MSPS) and proportionally higher power consumption, making it a viable functional substitute for the AD9943KCPZRL in most designs provided the system timing and thermal budget accommodate the faster device. Designers should validate the timing margins and power dissipation at the target operating frequency before committing to the substitution.
Package Type
High match
Resolution
High match
Maximum Sampling Rate
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
AD9943KCPZRL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5204 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 | AD9943KCPZRL | Why it matters |
|---|---|---|---|
| Resolution (ADC Bits) | 12 bit | 10 bit | Higher bit depth provides greater dynamic range and finer quantization, which directly affects image quality and cannot be substituted without changing system performance. |
| Maximum Conversion Rate | 40 MSPS | 25 MSPS | The sample rate limits the maximum pixel throughput; a slower converter may not support the same sensor resolution or frame rate. |
| Number of ADC Channels | 1 | 1 | Channel count determines how many analog signal paths can be digitized simultaneously; both are single-channel, so this aspect is compatible. |
| Supply Voltage (Analog/Digital) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Matching supply rails ensures the parts can be used in the same power domain without level shifting or regulator changes. |
| Package Type | 32-Lead LFCSP | 32-Lead LFCSP | Identical package and footprint allow drop-in board replacement without layout changes. |
| Operating Temperature Range | -20°C to +85°C | -20°C to +85°C | Equivalent temperature ratings confirm both parts suit the same environmental conditions. |
| Integrated Correlated Double Sampler (CDS) | Yes | Yes | On-chip CDS is essential for CCD sensor signal conditioning; both include it, supporting functional interchangeability. |
| Programmable Gain Amplifier (PGA) Range | 6 dB to 42 dB | 6 dB to 42 dB | Matching gain range ensures the same signal amplitude scaling can be achieved in the analog front end. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9945KCPZ | AD9943KCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Active |
| 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 AD9945KCPZ and AD9943KCPZRL?
The AD9945KCPZ and AD9943KCPZRL are complete 12-bit, 40 MSPS analog front ends (AFEs) for CCD imaging applications from Analog Devices. Both integrate a correlated double sampler (CDS), a programmable gain amplifier (PGA), and a 12-bit ADC in a 32-lead LFCSP package.
What is the main difference between the AD9945KCPZ and AD9943KCPZRL?
The primary difference is the maximum sampling rate. The AD9945KCPZ is specified for 40 MSPS operation, while the AD9943KCPZRL is specified for 25 MSPS operation. Both are otherwise similar 12-bit CCD signal processors in the same 32-lead LFCSP package.
Are the AD9945KCPZ and AD9943KCPZRL pin-compatible?
Yes. Both devices are offered in the same 32-lead LFCSP (CP-32) package with the same pinout, allowing a common PCB footprint. However, the AD9945KCPZ supports a higher maximum clock rate, so the board design must be validated for the target sample rate.
What is the resolution and ADC architecture of these AFEs?
Both the AD9945KCPZ and AD9943KCPZRL incorporate a 12-bit analog-to-digital converter. The devices provide 12-bit digitized output of the CCD signal after correlated double sampling and programmable gain amplification.
What supply voltages do the AD9945KCPZ and AD9943KCPZRL 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 a separate driver supply (DRVDD) for the output interface. Designers should confirm exact rail tolerances against the respective datasheets.
Can the AD9943KCPZRL be used as a drop-in replacement for the AD9945KCPZ?
Because both share the same package and pinout, the AD9943KCPZRL can physically fit the same footprint, but it is limited to 25 MSPS versus 40 MSPS for the AD9945KCPZ. A replacement is only valid if the system's pixel clock and timing requirements do not exceed the AD9943KCPZRL's 25 MSPS limit.
What is the role of the CDS and PGA in these devices?
The correlated double sampler (CDS) removes reset noise and low-frequency noise from the CCD output by sampling the reset level and the signal level. The programmable gain amplifier (PGA) then scales the signal before 12-bit digitization, allowing adaptation to varying CCD output amplitudes.
What package and operating temperature range do these devices use?
Both the AD9945KCPZ and AD9943KCPZRL are supplied in a 32-lead LFCSP package. The "K" grade in the part number denotes the commercial temperature range of 0°C to 70°C. Designers should verify the exact grade and temperature specification in the manufacturer datasheet for their application.