Part A
AD9945KCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5858 Stückzahl
- Package
- WFQFN-32
- Series
- Sensor- und Detektorschnittstellen
Replacement verdict
Compatible functional replacement candidate
The AD9945KCPZ and AD9944KCPRL are both complete 12-bit CCD signal processors from Analog Devices sharing the same 32-lead LFCSP footprint and core architecture, making the AD9945KCPZ a viable functional replacement candidate for the AD9944KCPRL in most imaging designs. Designers should validate the higher maximum clock rate and the correlated double sampling timing against their specific CCD timing budget before committing to production.
Resolution and Output Type
High match
Package and Pinout
High match
Maximum Clock Rate
Validation required
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD9944KCPRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5960 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 | AD9944KCPRL | Why it matters |
|---|---|---|---|
| Resolution (ADC bits) | 12 bit | 12 bit | Bit depth determines the dynamic range and quantization precision of the digitized signal; both are 12-bit so this is not a differentiator. |
| Maximum Conversion Rate | 40 MSPS | 40 MSPS | Sample rate sets the maximum pixel throughput; identical rates mean both can support the same sensor timing. |
| Number of ADC Channels | 1 | 1 | Channel count determines how many analog inputs can be digitized; both are single-channel AFE devices. |
| Input Signal Range | 1.0 V p-p | 1.0 V p-p | Input range must match the sensor output swing to avoid clipping or loss of sensitivity; both accept 1.0 V p-p. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Supply voltage compatibility ensures the part can drop into the same rail design; both operate from a 3.3 V nominal supply. |
| Package | 32-Lead LFCSP | 32-Lead LFCSP | Package and pinout must match for board-level substitutability; both use the same 32-lead LFCSP footprint. |
| Correlated Double Sampling (CDS) | Yes | Yes | CDS removes reset noise from CCD pixels; both integrate CDS, so both suit CCD sensor front ends. |
| Programmable Gain Amplifier (PGA) | Yes | Yes | An on-chip PGA allows gain adjustment to match sensor output; both include a PGA for signal scaling. |
| Operating Temperature Range | -20°C to +85°C | -20°C to +85°C | Temperature range defines the environments where the part is guaranteed to meet spec; both share the same commercial range. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9945KCPZ | AD9944KCPRL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| 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 AD9944KCPRL?
The AD9945KCPZ is a 12-bit CCD signal processor with a 40 MHz maximum conversion rate, while the AD9944KCPRL is a 12-bit CCD signal processor with a 25 MHz maximum conversion rate. Both are specified for operation over the 0°C to +70°C temperature range and are housed in 32-lead LFCSP packages, but the AD9945KCPZ supports higher pixel throughput for faster CCD readout applications.
Are the AD9945KCPZ and AD9944KCPRL pin-compatible?
Both devices are offered in a 32-lead LFCSP package with the same pin count, and their pin functions are largely equivalent per the respective Analog Devices datasheets. However, designers should verify the exact pin assignments and exposed pad connections against both datasheets before considering a layout-compatible substitution.
What is the maximum pixel conversion rate of each device?
The AD9945KCPZ supports a maximum conversion rate of 40 MHz, while the AD9944KCPRL supports a maximum conversion rate of 25 MHz. The higher rate of the AD9945KCPZ makes it suitable for higher-resolution or faster-frame-rate CCD imaging systems.
Do both parts include a correlated double sampler and programmable gain amplifier?
Yes. Both the AD9945KCPZ and AD9944KCPRL integrate a correlated double sampler (CDS), a programmable gain amplifier (PGA), and a 12-bit analog-to-digital converter, providing a complete analog front end for CCD signal processing per Analog Devices datasheets.
What is the difference in power consumption between the two devices?
Because the AD9945KCPZ operates at a higher maximum conversion rate (40 MHz) than the AD9944KCPRL (25 MHz), its typical power consumption at full speed is higher. Designers should consult the respective Analog Devices datasheets for the exact typical and maximum supply current specifications at the intended operating frequency.
Can the AD9944KCPRL be used as a drop-in replacement for the AD9945KCPZ?
Not as a direct drop-in replacement in all designs. Although both are 12-bit CCD signal processors in 32-lead LFCSP packages, the AD9944KCPRL has a lower maximum conversion rate (25 MHz versus 40 MHz). A replacement is only appropriate if the system's pixel rate does not exceed 25 MHz and all timing, register, and interface differences are validated against both datasheets.
What supply voltage do the AD9945KCPZ and AD9944KCPRL require?
Both devices operate from a single 3.0 V to 3.6 V analog and digital supply, with a separate supply for the output drivers, as specified in the Analog Devices datasheets. Designers should confirm the exact recommended supply ranges and decoupling requirements in the respective datasheets.