Part A
AD2S90APZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3754 ПКС
- Package
- PLCC-20
- Series
- Сбор данных - ADC-DAC - Специальное назначение
Replacement verdict
Not a drop-in replacement
The AD2S99BPZ and AD2S90APZ are not functionally interchangeable. The AD2S99BPZ is a sinusoidal oscillator designed to generate excitation signals for resolver-based position sensing systems, while the AD2S90APZ is a complete resolver-to-digital converter that performs the demodulation and conversion function. They serve complementary but distinct roles within a resolver signal chain and cannot substitute for one another in a direct replacement scenario.
Different device function
Different signal path role
Different input/output architecture
Different application stage
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD2S99BPZ | AD2S90APZ | Why it matters |
|---|---|---|---|
| Function | Programmable sinusoidal oscillator | Resolver-to-digital converter | These are fundamentally different device types, so they are not functionally substitutable in a design. |
| Package / Case | 20-Lead PLCC (P-LCC-20) | 20-Lead PLCC (P-LCC-20) | Package compatibility determines whether a part can be dropped onto an existing PCB footprint. |
| Supply Voltage | ±5 V (dual supply) | 5 V (single supply) | Supply requirements must match the board's power rails for the device to operate correctly. |
| Output Signal Type | Sinusoidal excitation output | Digital position/velocity data | The output interface determines what downstream circuitry or processor can accept the signal. |
| Frequency Range | Programmable, up to 20 kHz | Not applicable (converter) | Excitation frequency must match the resolver's specified operating frequency for accurate position sensing. |
| Resolution | Not applicable (oscillator) | 12-bit | Resolution defines the angular precision achievable in position measurement applications. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | The temperature range must cover the application's environmental conditions for reliable operation. |
| Typical Application | Resolver excitation source | Resolver signal decoding | Understanding the intended application clarifies whether the part fits the system's signal chain role. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD2S90APZ | AD2S99BPZ |
|---|---|---|
| Part Status | Active | Active |
| Type | R/D Converter | Oscillator, Sinusoidal |
| Number of Channels | 2 | - |
| Resolution(Bits) | 12 b | - |
| Data Interface | Serial | - |
| Voltage Supply Source | Dual ± | - |
| Voltage - Supply | ±4.75V ~ 5.25V | ±4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | - |
| Frequency | - | 2kHz ~ 20kHz |
| Supply Current | - | 8 mA |
Frequently asked questions
What are the primary functions of the AD2S99BPZ and AD2S90APZ?
The AD2S99BPZ is a sinusoidal oscillator that provides excitation signals for resolver-based position sensing systems. The AD2S90APZ is a resolver-to-digital converter (RDC) that converts resolver sine and cosine signals into digital position and velocity data. They serve complementary roles: the AD2S99BPZ generates the carrier excitation, while the AD2S90APZ processes the resolver feedback.
Can the AD2S99BPZ and AD2S90APZ be used together in a single resolver system?
Yes. The AD2S99BPZ is designed to supply the sinusoidal carrier excitation to a resolver, and the AD2S90APZ is designed to accept the resolver's sine and cosine outputs and convert them to digital angle and velocity data. Using them together is a typical signal-chain configuration for resolver-based motion control.
Do the AD2S99BPZ and AD2S90APZ have the same package and pinout?
No. The AD2S99BPZ is supplied in a 20-lead plastic DIP (PDIP) package, while the AD2S90APZ is supplied in a 20-lead plastic leaded chip carrier (PLCC) package. Their pinouts and PCB land patterns differ, so they are not pin-to-pin or footprint compatible.
What are the key supply voltage requirements for the AD2S99BPZ and AD2S90APZ?
The AD2S99BPZ operates from dual ±5 V supplies. The AD2S90APZ operates from a single +5 V supply. These differing supply requirements must be considered when designing or modifying a system that uses either device.
What is the maximum resolver input frequency or excitation frequency supported by each device?
The AD2S99BPZ is a programmable sinusoidal oscillator whose output frequency is set by external components; its excitation frequency range is specified in the manufacturer datasheet. The AD2S90APZ is specified for resolver input signals within a defined carrier frequency range, also detailed in its datasheet. The two devices must be configured so that the excitation frequency from the AD2S99BPZ falls within the AD2S90APZ's specified input frequency range for proper operation.
Are the AD2S99BPZ and AD2S90APZ drop-in replacements for each other?
No. They perform different functions, use different packages, and have different supply and signal requirements. The AD2S99BPZ is an oscillator, and the AD2S90APZ is a resolver-to-digital converter. Neither can directly replace the other in a circuit.
What output format does the AD2S90APZ provide, and does the AD2S99BPZ provide a similar output?
The AD2S90APZ provides digital output data representing resolver angle and velocity, typically via a serial interface. The AD2S99BPZ provides an analog sinusoidal excitation output and does not produce digital position or velocity data. Their output types are fundamentally different.
Are the AD2S99BPZ and AD2S90APZ still recommended for new designs?
Both devices are legacy Analog Devices components. Designers should verify current lifecycle status, availability, and any recommended replacements directly with Analog Devices or authorized distributors before specifying them in new designs.