Fixed-point DSP core — what the 10.24 MHz clock buys you
The ADSP-2103BS-40 is a 16-bit fixed-point digital signal processor from Analog Devices, running at a 10.24 MHz clock rate. Fixed-point arithmetic means the core handles integer and fractional data natively — no floating-point unit — so the programmer manages scaling and overflow in software. For audio filtering, motor control loops, or sensor fusion at this clock speed, the throughput is sufficient for real-time sample rates up to roughly 20 kHz with moderate filter tap counts. The 3 kB on-chip RAM holds program data and coefficients; for larger buffers or non-volatile storage, an external memory device is required because the part has no internal non-volatile memory. The synchronous serial port (SSP) connects directly to codecs, ADCs, or serial DACs — the typical front-end for a DSP-based signal chain.
Supply rails and temperature grade — single-rail simplicity with industrial range
Both the core and I/O operate at 3.30 V, which simplifies the power supply to a single rail. No separate 1.8 V core or 5 V I/O supply is needed, but legacy 5 V peripherals will require level translation. The supplier device package is 80-MQFP (14x14), matching the 80-BQFP case code.
Lifecycle and compliance — active but RoHS non-compliant
This is a legacy component; EU RoHS exemptions (e.g., exemption 7(a) for high-lead solder in certain applications) may apply, but for new designs targeting full RoHS compliance, a lead-free alternative from the ADSP-21xx family should be evaluated.