Part A
AD2S99BPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4512 PCS
- Package
- PLCC-20
- Series
- Horário - Horários e Oscilladores Programáveis
Replacement verdict
Not a drop-in replacement
The AD2S99BPZ and AD2S90APZ-RL7 are not functionally interchangeable. The AD2S99BPZ is a sinusoidal oscillator designed to generate excitation signals for resolver-based position sensing systems, while the AD2S90APZ-RL7 is a complete resolver-to-digital converter that integrates an oscillator, sine/cosine demodulator, and digital tracking loop. Their core functions, pin configurations, and system roles differ fundamentally, making direct substitution impossible without complete circuit redesign.
Different device function
Different output type
Different pin configuration
Different system role
Parts at a glance
Part B
AD2S90APZ-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6523 PCS
- Package
- LCC-20
- Series
- Acquisição de dados - ADCs-DACs - Objetivo Especial
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-RL7 | Why it matters |
|---|---|---|---|
| Function | Programmable sinusoidal oscillator (reference signal generator) | Variable resolution resolver-to-digital converter | These devices perform fundamentally different functions, so they are not direct substitutes in a signal chain. |
| Package / Case | 20-Lead PLCC (P-LCC-20) | 20-Lead PLCC (P-LCC-20) | Matching footprints allow drop-in board placement, but identical packages do not imply functional equivalence. |
| Supply Voltage | ±5 V (dual supply) | 5 V (single supply) | Different supply requirements affect power rail design and compatibility with existing circuitry. |
| Output Signal Type | Sinusoidal carrier output (programmable frequency) | Digital position/velocity data (serial) | One provides an analog excitation signal while the other provides digital position data, so they serve different roles. |
| Frequency Range | Programmable, typically 2 kHz to 20 kHz | Not applicable (converter input tracking) | The oscillator's programmable frequency must match the resolver excitation requirements, which the converter does not generate. |
| Resolution | Not applicable (analog oscillator) | 10-bit or 12-bit selectable | Resolution determines angular measurement precision in position feedback systems. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range ensures reliable operation in harsh environments. |
| Interface Type | Analog output | Serial digital interface | Interface compatibility determines how the device connects to the host controller or DSP. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD2S99BPZ | AD2S90APZ-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Type | Oscillator, Sinusoidal | R/D Converter |
| 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 AD2S99BPZ and AD2S90APZ-RL7?
The AD2S99BPZ is an Analog Devices programmable sinusoidal oscillator (also called a reference oscillator) used to generate the excitation carrier for resolver-to-digital (R/D) converter systems. The AD2S90APZ-RL7 is an Analog Devices monolithic resolver-to-digital converter that converts resolver sine/cosine signals into digital angle and velocity data. They are complementary devices: the AD2S99BPZ typically provides the carrier excitation, while the AD2S90APZ-RL7 performs the conversion.
Can the AD2S99BPZ and AD2S90APZ-RL7 be used together in a resolver system?
Yes. The AD2S99BPZ is designed to supply the sinusoidal carrier excitation required by resolvers, and the AD2S90APZ-RL7 is designed to accept resolver sine/cosine inputs and output digital angle and velocity. Using them together is a typical architecture for a complete resolver interface, provided the oscillator frequency and signal levels are compatible with the resolver and the AD2S90APZ-RL7 input requirements.
What is the primary function of the AD2S99BPZ?
The AD2S99BPZ is a programmable sinusoidal oscillator that generates a stable sine-wave carrier for resolver excitation. Its output frequency is set by external components, and it is intended to drive the primary winding of a resolver in R/D conversion systems.
What is the primary function of the AD2S90APZ-RL7?
The AD2S90APZ-RL7 is a resolver-to-digital converter that takes the sine and cosine signals from a resolver and converts them into digital angle and velocity outputs. It is a monolithic integrated circuit intended for motion-control and position-sensing applications.
Are the AD2S99BPZ and AD2S90APZ-RL7 direct substitutes for each other?
No. They are functionally different devices. The AD2S99BPZ is an oscillator/excitation source, while the AD2S90APZ-RL7 is a resolver-to-digital converter. They are not pin-for-pin or function-for-function replacements and cannot be substituted directly in a design.
Do the AD2S99BPZ and AD2S90APZ-RL7 use the same package type?
Both devices are offered in plastic DIP packages, but the specific package designations and pin counts must be verified from the respective Analog Devices datasheets. The AD2S99BPZ is commonly supplied in a 20-lead plastic DIP, and the AD2S90APZ-RL7 is commonly supplied in a 20-lead plastic DIP as well. Always confirm the exact package and pinout from the official datasheet before layout or replacement.
What key parameters should be verified before designing with the AD2S99BPZ and AD2S90APZ-RL7?
For the AD2S99BPZ, verify the oscillator output frequency range, output amplitude, supply voltage, and external component requirements. For the AD2S90APZ-RL7, verify the input signal range, resolution, accuracy, reference frequency range, supply voltage, and digital interface timing. These parameters must be checked against the official Analog Devices datasheets to ensure compatibility with the resolver and system requirements.
Are the AD2S99BPZ and AD2S90APZ-RL7 RoHS compliant?
RoHS compliance depends on the specific ordering part number and manufacturing date. The "Z" suffix in AD2S99BPZ and AD2S90APZ-RL7 typically indicates a RoHS-compliant, lead-free package per Analog Devices nomenclature. Confirm compliance status from the manufacturer's product page or the official datasheet for the exact orderable part number.