AD2S99APZ

Programmable Timers And Oscillators Overview

The AD2S99APZ is a programmable sinusoidal oscillator designed to provide excitation for resolvers and AC transducers. It integrates sine wave generation, synchronous reference synthesis, and loss-of-signal detection in a 20-pin PLCC package. The device operates on dual ±5 V supplies with a quiescent current of 8 mA. Output frequencies are selectable at 2 kHz, 5 kHz, 10 kHz, or 20 kHz via SEL pins, with intermediate frequencies adjustable using an external resistor on the FBIAS pin. The SYNREF output provides a phase-locked square wave reference.

Programmable Timers And Oscillators Feature Summary

• Programmable output frequency: 2 kHz, 5 kHz, 10 kHz, or 20 kHz
• Synthesized synchronous reference output (SYNREF) phase-locked to SIN/COS inputs
• Loss-of-signal (LOS) detection indicator
• Dynamic phase compensation for transducer variations

Programmable Timers And Oscillators Applications

• Excitation source for resolvers
• Excitation source for synchros
• Excitation source for LVDTs and RVDTs
• Reference for resolver-to-digital converters (e.g., AD2S80A, AD2S90)

Programmable Timers And Oscillators Procurement Notes

Verify component authenticity through authorized Analog Devices distributors. Confirm the P-20A PLCC package type and AP grade temperature range (-40°C to +85°C). Check for ESD sensitivity precautions during handling. Ensure power supply polarity matches the ±5 V requirement to prevent device damage.

Programmable Timers And Oscillators Selection Notes

Select the AD2S99APZ when a compact solution for resolver excitation and synchronous reference generation is required. Choose this part if dynamic phase compensation is needed to eliminate external preset circuits. Verify that the required operating frequency aligns with the standard 2–20 kHz range or can be achieved via the FBIAS pin adjustment.

Programmable Timers And Oscillators Part Context

The AD2S99 belongs to the AD2S99 series, which includes the AD2S99BP variant. Both share the same P-20A PLCC package and -40°C to +85°C operating temperature range. The 'AP' suffix denotes the specific grade within this family.

Programmable Timers And Oscillators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.