Analog Devices Inc. AD7341JP

The AD7341 filters the output of a separate voiceband DAC before the modem line interface. The manufacturer's historical data sheet pairs it with the AD7371 receive antialiasing filter, a separate ADC/DAC and a DSP in V.32/V.33-era modem architectures. The AD7341 itself is the transmit reconstruction filter; it does not contain the DAC, ADC, receive filter or complete modem.

The original Analog Devices ordering guide lists AD7341JP as a 28-pin plastic leaded chip carrier, package option P-28A. LCDChip records 28-LCC (J-Lead), and its package registry maps this to 28-LCC.jpg. The J-lead PLCC construction is consistent with the catalog's broad LCC wording, but the exact mechanical footprint must be checked against the manufacturer outline.

Mechanical checks

• Match package option P-28A and the manufacturer's top-view pin orientation.
• Check J-lead pad geometry before using an existing PLCC footprint.
• Verify board clearance and soldering requirements for repair work.

The expected catalog JPG is absent locally and returns HTTP 404 on the production site. Do not treat this missing image as a verified footprint drawing.

The following groups follow the manufacturer's AD7341 pin diagram and specification table. Consult that diagram for exact numbered pins and the JP top view.

The scanned Rev. A specification table uses defined supply, clock, load and ambient conditions. Verify all timing and analog limits directly in the full original data sheet before circuit changes.

AD7371 is the companion receive filter, not a substitute for AD7341. A transmit-path replacement must be checked for low-pass response, attenuation code, clock ratios, synchronization timing, analog levels, supply rails, 28-pin pinout and package geometry. Obsolete lifecycle adds sourcing and qualification constraints.

No internal alternative-product link is asserted without an exact LCDChip catalog match and engineering validation.

Analog Devices' AD7341 product page marks the family obsolete. Its original AD7341/AD7371 LC²MOS Voiceband Reconstruction and Antialiasing Filter Set data sheet, revision A, explicitly lists AD7341JP as the transmit-filter option in P-28A PLCC for 0 °C to +70 °C operation.

For this obsolete part, confirm the exact AD7341JP marking, date/lot traceability, package option and electrical test evidence. Compare any acquired device with the original Analog Devices drawing. The missing catalog JPG cannot establish authenticity or mechanical compatibility.

Verify the converter and switched-capacitor clock relationship, attenuation control, input/output swing, positive and negative supplies, analog/digital grounding and package orientation against the complete original circuit. Restore the production package JPG and finish footprint review before publication.