Part A
AD9943KCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8286 Stückzahl
- Series
- Sensor- und Detektorschnittstellen
Replacement verdict
Compatible functional replacement candidate
The AD9945KCPZ and AD9943KCPZ 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 pixel clock rate (40 MHz versus 25 MHz for the AD9943KCPZ), making it a viable functional replacement candidate where the higher throughput is acceptable, while the AD9943KCPZ remains suitable for lower-speed designs. Designers should validate timing margins and clock-rate-dependent performance before substituting in either direction.
Package Type
High match
Resolution
High match
Maximum Pixel Clock Rate
Validation required
Supply Voltage
High match
Parts at a glance
Part B
AD9945KCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5858 Stückzahl
- Package
- WFQFN-32
- Series
- Sensor- und Detektorschnittstellen
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 | AD9943KCPZ | Why it matters |
|---|---|---|---|
| Resolution (ADC Bits) | 12 bit | 10 bit | Higher resolution provides finer quantization of the analog pixel signal, improving image detail and dynamic range in imaging applications. |
| Maximum Conversion Rate | 40 MSPS | 25 MSPS | The maximum sampling rate determines the highest pixel throughput and supported sensor resolution/frame rate. |
| Number of ADC Channels | 1 | 1 | Channel count defines how many analog signal paths can be digitized simultaneously; both are single-channel front ends. |
| Input Signal Range (V) | 2 V p-p | 1 V p-p | The input full-scale range must match the sensor output swing to avoid clipping or loss of signal-to-noise performance. |
| Supply Voltage (V) | 3.0 to 3.6 | 3.0 to 3.6 | Operating supply voltage must be compatible with the system power rail; identical here so power design is unchanged. |
| Package | 32-Lead LFCSP | 32-Lead LFCSP | Package and pinout compatibility determine whether the parts are drop-in replacements on an existing PCB. |
| Correlated Double Sampling (CDS) | Yes | Yes | CDS removes reset noise from CCD pixels; both include it, so noise performance architecture is equivalent. |
| Programmable Gain Amplifier (PGA) Range | 6 dB to 42 dB | 6 dB to 42 dB | PGA range sets the ability to amplify weak sensor signals; matching ranges means similar sensitivity tuning capability. |
| Operating Temperature Range | -20 to +85 °C | -20 to +85 °C | Temperature range confirms suitability for the target environment; identical ratings mean no thermal design change. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9943KCPZ | AD9945KCPZ |
|---|---|---|
| Part Status | Discontinued at DigiKey | Active |
| Base Product Number | AD9943 | - |
| Digi Key Programmable | Not Verified | - |
| Type | CCD Signal Processor, 10-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 |
| Packaging | Tray | - |
Frequently asked questions
What are the key differences between the AD9945KCPZ and AD9943KCPZ?
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 AD9943KCPZ supports up to 25 MSPS. The AD9945 also offers a higher pixel gain range and faster serial interface clock, making it suited to higher-speed CCD applications.
Are the AD9945KCPZ and AD9943KCPZ pin-compatible?
Yes. Both devices are offered in the same 32-lead LFCSP (CP-32) package with the same pinout, which allows a common PCB footprint. However, pin compatibility does not guarantee functional equivalence; the system timing and clock rates must be validated against each device's datasheet.
What is the maximum sampling rate of each device?
The AD9945KCPZ is specified for a maximum conversion rate of 40 MSPS, while the AD9943KCPZ is specified for a maximum rate of 25 MSPS. Designs requiring pixel rates above 25 MSPS should use the AD9945KCPZ.
Do both parts include a correlated double sampler and programmable gain amplifier?
Yes. Both the AD9945KCPZ and AD9943KCPZ integrate a correlated double sampler (CDS), a programmable gain amplifier (PGA), and a 12-bit ADC, along with black level clamping and on-chip timing generation, making them complete analog front ends for CCD signal processing.
What is the difference in pixel gain range between the two devices?
The AD9945KCPZ provides a PGA gain range of 6 dB to 42 dB, whereas the AD9943KCPZ provides a gain range of 6 dB to 40 dB. The wider range of the AD9945KCPZ offers additional flexibility for low-light CCD applications.
Can the AD9943KCPZ be used as a drop-in replacement for the AD9945KCPZ?
Not unconditionally. Although the package and pinout match, the AD9943KCPZ has a lower maximum sampling rate (25 MSPS vs. 40 MSPS) and a narrower gain range. It can only be substituted if the system's pixel rate and gain requirements fall within the AD9943KCPZ specifications and the design is revalidated against its datasheet.
What supply voltage do these CCD signal processors require?
Both the AD9945KCPZ and AD9943KCPZ operate from a single 3.0 V to 3.6 V analog supply, with a separate digital supply in the same range, and include an on-chip reference and internal timing generation to simplify system design.