AD7689ACPZ vs AD7689BCPZRL7

Both parts are 16-bit, 8-channel, 250 kSPS PulSAR analog-to-digital converters from Analog Devices in a 20-lead LFCSP package. The primary difference is the ordering format: AD7689BCPZRL7 is supplied in tape-and-reel packaging (7-inch reel, 1,500 units per reel) for automated assembly, while AD7689ACPZ is supplied in tray packaging. The "B" and "A" in the part numbers denote the same silicon die; the suffix differences reflect packaging and shipment format rather than electrical specification changes.

Yes. Both devices share the same datasheet specifications: 16-bit resolution, 8-channel multiplexer, 250 kSPS throughput, SPI-compatible serial interface, internal 4.096 V reference, and selectable input ranges (0 V to VREF, 0 V to 2×VREF, or ±VREF). The AD7689BCPZRL7 and AD7689ACPZ differ only in packaging format (tape-and-reel vs. tray), so their electrical, timing, and functional characteristics are the same.

Yes, from a footprint and electrical standpoint. Both are the same 20-lead LFCSP (CP-20) package with identical pinout and land pattern, and both meet the same datasheet specifications. The only practical consideration is the supply format: the AD7689BCPZRL7 is tape-and-reel, which suits automated pick-and-place lines, while the AD7689ACPZ is tray-packed. Design validation against the AD7689 datasheet is recommended before substitution.

Both devices are offered in a 20-lead LFCSP (lead frame chip scale package), designated CP-20 in Analog Devices documentation. The package measures 4 mm × 4 mm with a 0.5 mm pitch. Pin functions, including the analog inputs, reference, SPI interface, and power pins, are identical between the two orderable part numbers.

Both parts provide 16-bit resolution with no missing codes and a maximum throughput of 250 kSPS. They feature an 8-channel multiplexer with selectable single-ended or differential input configurations, making them suitable for multichannel data acquisition systems.

Yes. Both devices integrate an internal 4.096 V reference with selectable temperature coefficient options, and they also support the use of an external reference. The internal reference can be configured for the full-scale input range, and the devices offer selectable input spans of 0 V to VREF, 0 V to 2×VREF, or ±VREF.

Both devices use an SPI-compatible serial interface supporting clock rates up to 50 MHz, with a separate digital supply (VIO) that allows operation from 1.8 V to 5 V logic levels. The interface supports daisy-chain and busy-indicator modes, enabling multiple devices to share a single host controller.

Both orderable part numbers are specified over the industrial temperature range of −40 °C to +85 °C, consistent with the AD7689 datasheet. The "B" and "A" designators in the part numbers do not indicate different temperature grades; both are industrial-grade devices.