Part A
AD2S1210ASTZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3827 PCS
- Package
- LQFP-48
- Series
- Acquisição de dados - ADCs-DACs - Objetivo Especial
Replacement verdict
Compatible functional replacement candidate
The AD2S1210ASTZ and AD2S1200WST are both resolver-to-digital converters from Analog Devices sharing a common functional architecture and 44-lead LQFP footprint, making the AD2S1210ASTZ a viable functional replacement candidate for the AD2S1200WST in resolver interface applications. However, designers must validate supply voltage configuration, excitation frequency programming, and temperature grade requirements before committing to a drop-in substitution, as these parameters differ between the two devices.
Resolution
High match
Supply Voltage
Validation required
Excitation Frequency
Validation required
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 | AD2S1210ASTZ | AD2S1200WST | Why it matters |
|---|---|---|---|
| Resolution | 10/12/14/16 bits (user selectable) | 12 bits | Higher selectable resolution enables more precise position feedback, which is critical for high-accuracy motor control and servo applications. |
| Input Signal Type | Resolver | Resolver | Both interface with resolvers, so sensor compatibility is maintained when substituting between the two devices. |
| Maximum Tracking Rate | 3125 rps (at 10-bit resolution) | 1000 rps | A higher tracking rate supports faster rotating machinery without losing position lock, affecting suitability for high-speed motor applications. |
| Supply Voltage | 5 V (AVDD/DVDD) | 5 V | Matching supply requirements simplifies power supply design and allows drop-in replacement without voltage rail changes. |
| Output Interface | Parallel and Serial (SPI-compatible) | Parallel and Serial | Interface compatibility determines whether the host controller firmware and PCB routing must be redesigned when swapping parts. |
| Package | 48-Lead LQFP (7x7 mm) | 44-Lead LQFP (10x10 mm) | Different package footprints and pin counts prevent direct PCB drop-in substitution without layout changes. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Identical industrial temperature ranges ensure both parts are suitable for the same harsh-environment applications. |
| Fault Detection / Monitoring | Built-in fault detection (LOS, DOS, LOT) | Built-in fault detection (LOS, DOS, LOT) | On-chip diagnostics improve system reliability and safety by detecting signal loss or degradation in resolver feedback. |
| Excitation Frequency Range | 2 kHz to 20 kHz | 10 kHz to 20 kHz | A wider excitation frequency range offers greater flexibility in matching different resolver types and system noise requirements. |
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 | AD2S1210ASTZ | 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 AD2S1210ASTZ and the AD2S1200WST?
The AD2S1210ASTZ 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 serial interface only. The AD2S1210ASTZ offers higher resolution and a parallel interface option, whereas the AD2S1200WST is limited to 12-bit resolution and serial communication.
Are the AD2S1210ASTZ and AD2S1200WST pin-compatible?
No, they are not pin-compatible. The AD2S1210ASTZ is available in a 48-lead LQFP package, while the AD2S1200WST is available in a 44-lead LQFP package. The different package sizes and pin counts prevent direct PCB footprint compatibility.
Can the AD2S1200WST be used as a drop-in replacement for the AD2S1210ASTZ?
No, the AD2S1200WST cannot be used as a drop-in replacement for the AD2S1210ASTZ due to differences in package size, pin count, resolution, and interface type. A redesign of the PCB and system firmware would be required.
What is the resolution of the AD2S1210ASTZ compared to the AD2S1200WST?
The AD2S1210ASTZ supports selectable resolution from 10 bits to 16 bits, while the AD2S1200WST provides a fixed 12-bit resolution. The AD2S1210ASTZ therefore offers higher maximum resolution for more precise position feedback.
Do both the AD2S1210ASTZ and AD2S1200WST support serial interfaces?
Yes, both devices support a serial interface for configuration and data readback. However, the AD2S1210ASTZ also includes a parallel interface option, while the AD2S1200WST only provides a serial interface.
What are the operating temperature ranges for the AD2S1210ASTZ and AD2S1200WST?
Both the AD2S1210ASTZ and AD2S1200WST are specified for the industrial temperature range of −40°C to +125°C junction temperature, as stated in their respective Analog Devices datasheets.
Which device is more suitable for high-resolution motor control applications?
The AD2S1210ASTZ is more suitable for high-resolution motor control applications because it offers up to 16-bit resolution, whereas the AD2S1200WST is limited to 12-bit resolution. Higher resolution enables finer position and velocity feedback.