Analog Devices Inc. AD9943KCPZRL

Overview

AD9943KCPZRL from Analog Devices is a complete 10-bit, 25 MSPS CCD signal processor IC integrating correlated double sampling (CDS), 6 dB to 40 dB digitally controlled VGA, optical black clamp, and 3-wire serial interface - all in a single 32-lead 5 mm × 5 mm LFCSP package. It conditions analog outputs from interlaced/progressive scan CCD arrays for digital still cameras and portable imaging systems.

For engineers reviewing the AD9943KCPZRL datasheet, AD9943KCPZRL pinout, AD9943KCPZRL application, or AD9943KCPZRL equivalent, key selection criteria include guaranteed no-missing-codes 10-bit ADC performance, 0.3 LSB_rms total output noise at 6 dB gain, ±1 dB gain accuracy across full VGA range, and compatibility with 3 V single-supply operation in space-constrained imaging front ends.

Technical Context

The AD9943KCPZRL implements a single-channel CCD signal chain with CDS sampling on SHP/SHD rising edges (3 ns internal delay), followed by VGA gain control via 1024-step resolution register (0–1023 codes), then optical black clamping synchronized to CLPOB pulses during shielded pixel intervals. Its pipelined 10-bit ADC uses a 2.0 V full-scale input range with straight binary coding.

Internal registers-including VGA gain, clamp level (0–255 steps), power-down mode, and clock polarity-are configured via a 3-wire serial interface (SL/SCK/SDATA) supporting up to 10 MHz SCK frequency. The device operates across −20°C to +85°C with 79 mW typical power dissipation and supports preblanking (PBLK) for zero-output blanking during horizontal retrace.

Key Specifications

Pinout & Package

AD9943KCPZRL is housed in a 32-lead lead-frame chip-scale package (LFCSP) with an exposed thermal pad soldered to PCB ground. Pin 1 is located at top-left per standard JEDEC orientation; the exposed pad (EPAD) must be connected to system ground for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CCD signal processing applications.

Compared with AD9944KCPZRL, the AD9943KCPZRL trades 2 bits of resolution for lower power (79 mW vs. 85 mW typ), smaller data bus, and reduced FPGA/ASIC interface complexity. Versus TDA9943HN/C1, it delivers superior noise performance (0.3 vs. ~1.2 LSB_rms) and integrated clamping - but mandates 3 V design and new layout.

Availability

AD9943KCPZRL is available at Aetrix Electronics and suitable for digital still cameras, portable CCD imaging devices, and PC cameras requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for AD9943KCPZRL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD9943KCPZRL belongs to Analog Devices' CCD signal processor product line, designed specifically for high-fidelity analog front-end conditioning of interlaced and progressive scan CCD sensor outputs in consumer and industrial imaging systems.

FAQ

What is the ADC resolution and linearity performance of the AD9943KCPZRL?

The AD9943KCPZRL features a true 10-bit analog-to-digital converter with guaranteed no missing codes across its full operating range. Its differential nonlinearity (DNL) is specified at ±0.3 LSB, ensuring monotonic behavior and accurate grayscale representation. This performance is validated under standard conditions: AVDD = DVDD = DRVDD = 3 V, fSAMP = 25 MSPS, and 6 dB VGA gain. The AD9943KCPZRL maintains this specification across −20°C to +85°C ambient temperature.

Does the AD9943KCPZRL support optical black clamping, and how is it configured?

Yes, the AD9943KCPZRL includes a fully integrated optical black clamp loop that corrects residual DC offsets using the CLPOB input signal during shielded pixel intervals. Clamp level is programmable via an 8-bit register (0–255 steps), mapping to 0–63.75 LSB at the ADC output. Configuration is performed through the 3-wire serial interface (SL/SCK/SDATA); Bit D3 in the operation register can disable the loop if external digital clamping is preferred. The AD9943KCPZRL requires CLPOB pulse widths ≥20 pixels for optimal noise performance.

What are the power supply requirements and typical consumption of the AD9943KCPZRL?

The AD9943KCPZRL operates from a single 3 V supply with allowable range 2.7 V to 3.6 V across AVDD, DVDD, and DRVDD rails. Typical power consumption is 79 mW in normal operation and drops to 150 µW in power-down mode. Each supply rail requires local decoupling: 0.1 µF ceramic capacitor close to the pin plus a 10 µF bulk capacitor. The exposed thermal pad must be soldered to PCB ground to maintain θ_JA = 27.7°C/W and ensure thermal stability under continuous 25 MSPS operation.

How does the correlated double sampling (CDS) function work in the AD9943KCPZRL?

The AD9943KCPZRL implements CDS using two precisely timed sampling clocks: SHP (for CCD reference level) and SHD (for CCD data level), both edge-triggered on rising transitions. The internal circuit subtracts the reference sample from the data sample to cancel kTC noise, reset pedestal, and low-frequency drift. An internal 3 ns aperture delay applies to both clocks, and timing alignment between SHP and SHD (tS1 = 10 ns, tS2 = 16–20 ns) is critical for optimal noise rejection. The AD9943KCPZRL supports input signals up to 1.0 V p-p before saturation and tolerates 500 mV reset transients.

Can the AD9943KCPZRL be used with 12-bit CCD sensors, and what is its maximum input signal range?

The AD9943KCPZRL is optimized for 10-bit system resolution and accepts CCD analog inputs up to 1.0 V p-p before saturation, with tolerance for 500 mV reset transients and 100 mV optical black pixel amplitude. While it can interface with 12-bit CCDs, its 10-bit ADC limits effective resolution to 10 bits; for full 12-bit capture, the pin-compatible AD9944KCPZRL (12-bit ADC) is required. The AD9943KCPZRL's 2.0 V full-scale ADC input range and straight binary coding ensure compatibility with downstream 10-bit image processors without scaling loss.