Analog Devices Inc. AD9869BCPZ

The AD9869 is a mixed-signal front end for half- or full-duplex broadband modem designs. It integrates transmit and receive signal chains with a flexible digital interface, SPI configuration and an on-chip clock synthesizer. Analog Devices marks the product obsolete; confirm authorized sourcing and device condition for maintenance applications.

• 12-bit transmit DAC with 2× or 4× interpolation and up to 200 MSPS update rate.
• 12-bit receive ADC with up to 80 MSPS sampling.
• Integrated receive PGA and programmable low-pass filter.
• Integrated transmit line driver and digital gain control.
• Half- and full-duplex data paths with power-down options.

The transmit path includes interpolation filtering, a 12-bit TxDAC and a current-output line-driver path. The receive chain includes an RxPGA adjustable from −12 dB to +48 dB, a programmable third-order low-pass filter and a 12-bit ADC. An internal PLL clock multiplier, two auxiliary programmable clock outputs and a serial programming port support system integration. The part supports both half- and full-duplex digital transfers and selective power reduction.

The manufacturer ordering guide maps AD9869BCPZ to the 64-lead LFCSP_VQ, CP-64-3. Its drawing shows a 9 x 9 mm body with exposed pad and 0.50 mm lead pitch. The catalog's generic "64-VFQFN Exposed Pad, CSP" classification is broadly consistent but not the controlled package designation. The CP-64-3 registration and local package JPG have not been verified.

Assembly checks

• Use the CP-64-3 outline and exposed-pad guidance in the ADI datasheet.
• Verify lead pitch, pin-one orientation and stencil design.
• Connect and thermally manage the exposed pad as specified.

The ADI pin table identifies differential Rx inputs, Tx current outputs, digital data ports, SPI control, clock inputs and outputs, reference connections, several 3.3 V supply domains and ground. Do not infer exact pin numbers from generic 64-QFN artwork; use the AD9869 Rev. A pin configuration and package drawing.

Performance values depend on the datasheet test conditions and programmed operating mode.

The database contains AD9866BCPZ and AD9867BCPZ as family comparison candidates. Analog Devices describes AD9869 as pin-compatible with AD9866 but notes reduced functionality and a different PLL VCO range. Neither part is an approved drop-in substitute without digital interface, analog performance, firmware, package and supply validation. AD9867 has different converter specifications.

The Analog Devices AD9869 Rev. A datasheet is the primary technical source for architecture, electrical limits, pinout, CP-64-3 drawing and exact ordering code. The manufacturer product page identifies the lifecycle as obsolete. Its overview contains an inconsistent package sentence; the exact ordering guide and mechanical drawing govern the 64-lead package identification.

• Broadband wireline modem transceivers.
• Half- or full-duplex legacy communications equipment.
• Maintenance of validated AD9869-based signal-chain boards.

Verify markings, date code, provenance, moisture handling and exposed-pad condition for this obsolete device. The local catalog lists 4,416 units at USD 25.04, minimum quantity 12, with no tier prices. An indexed Rochester listing reports 5,730 units and USD 23.42 at 100, USD 20.95 at 1,000 and USD 19.72 at 10,000; another distributor page lists 2,096 units at USD 22.56. These are external claims, not authenticated current availability, and do not validate the catalog's 4,416-unit quantity or its 12-unit price tier. Preserve catalog pricing pending procurement review.

Check the exact CP-64-3 land pattern, exposed-pad connection, supply decoupling, clock plan, SPI registers and mode-dependent analog limits. Missing local package JPG/registration and unverified commercial values prevent publication. Keep this detail in manual review with noindex until all checks pass.