Analog Devices Inc. AD9941BSTZ

The AD9941 accepts a differential CCD-related analog input, conditions it with a variable-gain path and black-level control, then digitizes it at up to 56 MSPS. A three-wire serial interface configures device functions. It is an imaging analog front end, not a standalone image sensor or complete camera processor.

• Combines analog imaging conditioning and 14-bit conversion in one IC.
• Supports sampling rates up to 56 MSPS.
• Provides variable gain and optical-black clamping for CCD signal paths.
• Uses a compact 7 x 7 mm, 48-lead LQFP body.
• Operates from 3 V-class analog, digital and output-driver supplies.

The signal path includes differential VIN+ and VIN- inputs, a 0 or 6 dB input gain selection, variable gain, optical-black level processing, and a 14-bit ADC. Timing pins include ADCLK, PBLK and CLPOB. SDATA, SCK and SL form the serial control interface. Reference connections REFT and REFB require the external network and decoupling prescribed in the manufacturer data sheet.

The manufacturer ordering guide identifies AD9941BSTZ as a Pb-free 48-lead LQFP, package code ST-48, with a 7 x 7 mm body and 0.5 mm lead pitch. The database registers the matching 48-LQFP package, but its expected local JPG is missing; verify the board land pattern against the manufacturer's mechanical drawing.

Assembly checks

• Confirm 7 x 7 mm body and 0.5 mm pitch.
• Check pin-one orientation and lead coplanarity.
• Use the official ST-48 drawing for the land pattern.

This draft must remain unpublished until the registered package JPG is present and validated.

VIN+ is pin 30 and VIN- is pin 31. ADCLK is pin 16, PBLK pin 19 and CLPOB pin 20. Serial controls are SDATA pin 44, SCK pin 45 and SL pin 46; RESET is pin 43. REFT and REFB are pins 38 and 39. The 14-bit output spans D0 and D1 on pins 47 and 48, and D2 through D13 on pins 1 through 12. Consult the manufacturer pin table for all power, ground, reference and unused-pin requirements.

Typical figures are not guaranteed limits. Verify the full manufacturer electrical and timing tables for design sign-off.

No database-verified drop-in alternative is linked. A candidate must match the 14-bit 56 MSPS signal path, CCD timing and clamp controls, serial register behavior, supply domains, reference network, output interface, temperature grade and 48-lead LQFP footprint. Similar part numbers alone do not establish interchangeability.

Analog Devices publishes the AD9941 product page and manufacturer data sheet, including the exact AD9941BSTZ ordering entry and ST-48 package drawing. Its current product page marks the family NRND. Use the latest manufacturer revision and errata for final engineering decisions.

• Existing CCD camera analog front ends.
• Industrial and scientific imaging signal chains designed for the AD9941.
• Maintenance of legacy imaging boards using the exact ST-48 footprint.

Confirm full AD9941BSTZ marking, Pb-free finish, lot traceability, moisture handling and package dimensions against the purchase specification. The catalog stock and price have not been independently matched to a live authorized-distributor USD tier ladder; request a current quotation and availability confirmation before ordering.

Check analog input amplitude, clock timing, optical-black clamp sequence, serial settings, supply decoupling, reference circuitry and footprint before use. The missing local package JPG and unverified live distributor inventory and tier prices block publication of this draft.