Part A
AD2S1210BSTZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4477 PCS
- Package
- LQFP-48
- Series
- Acquisição de dados - ADCs-DACs - Objetivo Especial
Replacement verdict
Compatible functional replacement candidate
The AD2S1210BSTZ and AD2S1200WST are both resolver-to-digital converters from Analog Devices sharing a common functional architecture and 44-lead LQFP footprint, making the AD2S1210BSTZ a viable functional replacement candidate for the AD2S1200WST in many resolver interface designs. However, designers must validate key differences in resolution, excitation frequency, and operating temperature range before committing to a drop-in substitution.
Resolution
Validation required
Excitation Frequency
Validation required
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
AD2S1200WST
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4926 PCS
- Package
- LQFP-44
- 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 | AD2S1210BSTZ | AD2S1200WST | Why it matters |
|---|---|---|---|
| Resolution | 10/12/14/16 bit (user selectable) | 12 bit | Higher selectable resolution improves angular accuracy and allows the part to serve applications requiring finer position feedback. |
| Input Signal Type | Resolver | Resolver | Both interface to resolvers, so sensor compatibility is preserved for direct substitution. |
| Supply Voltage | 5 V analog, 5 V digital (with 2.5 V to 5 V logic interface) | 5 V | Supply requirements affect board-level power design and whether the part can drop into an existing rail configuration. |
| Interface | SPI | Parallel and serial (SPI-compatible) | Interface differences determine host MCU/DSP compatibility and required firmware or glue logic changes. |
| Package | 48-lead LQFP (7x7 mm) | 44-lead LQFP | Different package footprints and pin counts prevent direct drop-in replacement without PCB redesign. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Industrial temperature range ensures reliability in harsh environments for both parts. |
| Max Tracking Rate | 3125 rps (at 10-bit resolution) | 1000 rps | Higher tracking rate supports faster rotating machinery and higher-speed control loops. |
| Fault Detection | Built-in fault detection (LOS, DOS, LOT) | Built-in fault detection (LOS, DOS, LOT) | Integrated diagnostics improve system safety and reduce external monitoring circuitry. |
| Excitation Frequency | 10 kHz to 20 kHz | 10 kHz to 20 kHz | Matching excitation range ensures compatibility with common resolver transducers. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD2S1210BSTZ | AD2S1200WST |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | R/D Converter | R/D Converter |
| Number of Channels | 2 | 2 |
| Resolution(Bits) | 10, 12, 14, 16 b | 12 b |
| Data Interface | Serial, Parallel | Serial, Parallel |
| Voltage Supply Source | Analog and Digital | Analog and Digital |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD2S1210BSTZ and the AD2S1200WST?
The AD2S1210BSTZ is a 10-bit to 16-bit resolvable-to-digital converter with a parallel and serial interface, while the AD2S1200WST is a 12-bit resolvable-to-digital converter with a parallel interface only. The AD2S1210BSTZ offers higher resolution and additional serial interface capability, whereas the AD2S1200WST is a lower-resolution, parallel-only device.
Are the AD2S1210BSTZ and AD2S1200WST pin-compatible?
No. The AD2S1210BSTZ is supplied in a 48-lead LQFP package, while the AD2S1200WST is supplied in a 44-lead LQFP package. The different package sizes and pin counts mean they are not pin-compatible and cannot be used as drop-in replacements without PCB redesign.
What is the resolution of each device?
The AD2S1210BSTZ supports selectable resolution of 10, 12, 14, or 16 bits. The AD2S1200WST provides a fixed 12-bit resolution. The AD2S1210BSTZ therefore offers higher maximum resolution and greater flexibility for applications requiring finer position feedback.
Do both devices support serial communication?
No. The AD2S1210BSTZ supports both parallel and serial interfaces for data readback and configuration. The AD2S1200WST supports only a parallel interface. If serial communication is required, only the AD2S1210BSTZ is suitable.
What is the operating temperature range for these devices?
Both the AD2S1210BSTZ and the AD2S1200WST are specified for the industrial temperature range of −40°C to +85°C. This makes both devices suitable for industrial and automotive applications within that range.
Can the AD2S1200WST be used as a substitute for the AD2S1210BSTZ in an existing design?
No, not directly. The AD2S1200WST has a lower maximum resolution (12 bits vs. 16 bits), lacks a serial interface, and uses a different package (44-lead LQFP vs. 48-lead LQFP). A direct substitution would require hardware and software redesign and validation against the target application requirements.
What is the maximum tracking rate of each converter?
The AD2S1210BSTZ has a maximum tracking rate that depends on the selected resolution, with higher resolutions yielding lower maximum tracking rates. The AD2S1200WST has a specified maximum tracking rate of 1,000 rps. For exact tracking rate values at each resolution setting, refer to the respective manufacturer datasheets.
Are both devices available in automotive-qualified versions?
The AD2S1200WST is an automotive-qualified version, as indicated by the "W" in the part number, and is qualified to AEC-Q100 standards. The AD2S1210BSTZ is an industrial-grade device and is not automotive-qualified. For automotive applications requiring AEC-Q100 qualification, the AD2S1200WST is the appropriate choice.