Overview
The AD2S99APZ, produced by Analog Devices Inc., is a programmable sinusoidal oscillator designed to provide sine wave excitation for resolvers and a wide variety of AC transducers. This component integrates the transducer excitation, synchronous reference, and loss of signal detection functions into a small, cost-effective package. It is particularly useful in applications requiring precise phase locking and compensation for temperature and cabling-dependent phase shifts.
Key Specifications
| Parameter | Min | Typ | Max | Units | Test Conditions |
|---|---|---|---|---|---|
| Frequency Output Range | 2 kHz | - | 20 kHz | Hz | SEL1 and SEL2 pin configurations |
| Accuracy | - | - | - | - | Dependent on frequency selection |
| Quiescent Current (IDD, ISS) | ±8 mA | - | ±15 mA | mA | No Load |
| Operating Temperature Range | -40°C | - | +85°C | °C | - |
| Storage Temperature Range | -65°C | - | +150°C | °C | - |
| Package Type | - | - | - | 20-Pin PLCC | - |
Key Features
- Programmable Sinusoidal Oscillator: The AD2S99APZ allows for programmable excitation frequencies of 2 kHz, 5 kHz, 10 kHz, and 20 kHz using the frequency select pins. Intermediate frequencies can be achieved by adding an external resistor.
- Synchronous Reference Output: Provides a 3 V p-p square wave output that is phase locked to the SIN and COS inputs, compensating for temperature and cabling-dependent phase shifts.
- Loss of Signal Detection: The “LOS” output pin indicates if both the transducer secondary winding connections become disconnected from the SIN and COS inputs.
- Low Cost and Compact Package: Integrated into a 20-pin PLCC package, making it a cost-effective solution.
Applications
- Excitation Source for Resolvers: Suitable for use with resolvers and resolver-to-digital converters such as AD2S80A, AD2S82A, AD2S83, and AD2S90.
- Excitation Source for Synchros, LVDTs, RVDTs, Pressure Transducers, Load Cells, and AC Bridges: Versatile in various AC transducer applications.
Q & A
- What is the primary function of the AD2S99APZ?
The AD2S99APZ is a programmable sinusoidal oscillator that provides sine wave excitation for resolvers and various AC transducers.
- How is the output frequency of the AD2S99APZ programmed?
The output frequency can be programmed to 2 kHz, 5 kHz, 10 kHz, or 20 kHz using the frequency select pins. Intermediate frequencies can be achieved by adding an external resistor.
- What is the purpose of the synchronous reference output?
The synchronous reference output is a 3 V p-p square wave that is phase locked to the SIN and COS inputs, compensating for temperature and cabling-dependent phase shifts.
- How does the AD2S99APZ detect signal loss?
The “LOS” output pin indicates if both the transducer secondary winding connections become disconnected from the SIN and COS inputs.
- What is the operating temperature range of the AD2S99APZ?
The operating temperature range is from -40°C to +85°C.
- What type of package does the AD2S99APZ come in?
The AD2S99APZ is packaged in a 20-pin PLCC.
- Can the AD2S99APZ be used with resolver-to-digital converters?
- What other types of transducers can the AD2S99APZ be used with?
- What are the recommended decoupling capacitors for the AD2S99APZ?
- Why is it important to connect the power supplies correctly?
