Part A
AD2S1210CSTZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2414 PCS
- Package
- LQFP-48
- Series
- Acquisition de données - ADC DAC - dédié
Replacement verdict
Compatible functional replacement candidate
The AD2S1210CSTZ and AD2S1200WST are both resolver-to-digital converters from Analog Devices sharing a common functional core, but they differ in resolution, excitation frequency capability, and package footprint. The AD2S1210CSTZ offers higher resolution and a wider excitation frequency range, making it a viable functional upgrade in many designs, though pinout and external component differences require careful validation before direct substitution.
Resolution
Validation required
Excitation Frequency
Validation required
Input Signal Type
High match
Package Type
Not compatible
Parts at a glance
Part B
AD2S1200WST
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4926 PCS
- Package
- LQFP-44
- Series
- Acquisition de données - ADC DAC - dédié
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD2S1210CSTZ | AD2S1200WST | Why it matters |
|---|---|---|---|
| Resolution | 10, 12, 14, or 16 bits (user selectable) | 12 bits | Higher selectable resolution allows finer angular position measurement, which directly affects control loop accuracy in motor commutation and position feedback. |
| Input Signal Type | Sine/cosine differential (programmable excitation) | Sine/cosine differential | Both accept resolver sin/cos inputs, but the AD2S1210 offers programmable excitation frequency and amplitude, enabling broader resolver compatibility. |
| Excitation Frequency | Programmable, 2 kHz to 20 kHz | 10 kHz or 20 kHz (selectable) | Flexible excitation frequency supports a wider range of resolver types and helps optimize noise immunity and signal integrity. |
| Max Tracking Rate | Up to 3125 rps (at 10-bit resolution) | Up to 1000 rps | Higher tracking rate enables use in high-speed motor applications without losing position lock. |
| Supply Voltage | 5 V analog, 5 V digital (with 2.3 V to 5 V logic I/O) | 5 V analog, 5 V digital | The AD2S1210 supports lower-voltage logic interfaces, simplifying connection to modern 3.3 V or 2.5 V microcontrollers without level shifting. |
| Output Interface | Parallel and serial (SPI-compatible) | Parallel and serial | Interface options determine how easily the converter integrates with the host processor and whether additional glue logic is required. |
| Operating Temperature Range | -40°C to +125°C (CSTZ grade) | -40°C to +125°C (WST grade) | Both parts are rated for industrial temperature ranges, making them suitable for harsh-environment motor control applications. |
| Package | 48-lead LQFP (7 mm x 7 mm) | 44-lead LQFP (10 mm x 10 mm) | Different package footprints and pin counts mean the two devices are not drop-in replacements; PCB layout must be redesigned. |
| Fault Detection / Diagnostics | Built-in fault detection (loss of signal, tracking error, etc.) | Limited fault detection | Enhanced diagnostics improve system reliability and safety by allowing early detection of resolver or signal faults. |
| Velocity Output | Yes, digital velocity output available | Yes, digital velocity output available | Velocity output is essential for closed-loop speed control and eliminates the need for separate tachometer processing. |
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 | AD2S1210CSTZ | 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 ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD2S1210CSTZ and the AD2S1200WST?
The AD2S1210CSTZ 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 AD2S1210CSTZ offers higher resolution and additional serial communication capability, whereas the AD2S1200WST is limited to 12-bit resolution and parallel data output.
Are the AD2S1210CSTZ and AD2S1200WST pin-compatible?
No. The AD2S1210CSTZ 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 maximum resolution of each device?
The AD2S1210CSTZ supports selectable resolution from 10 bits to 16 bits. The AD2S1200WST provides a fixed 12-bit resolution. Therefore, the AD2S1210CSTZ can achieve finer angular resolution than the AD2S1200WST.
Do both devices support serial communication interfaces?
No. The AD2S1210CSTZ includes both a parallel interface and a serial interface for data readback and configuration. The AD2S1200WST provides only a parallel interface. If serial communication is required, only the AD2S1210CSTZ is suitable.
What are the operating temperature ranges for these two converters?
Both the AD2S1210CSTZ and the AD2S1200WST are specified for the industrial temperature range of −40°C to +85°C. They are not rated for automotive or extended temperature ranges beyond this specification.
Can the AD2S1200WST be used as a substitute for the AD2S1210CSTZ 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). Substitution would require verification of resolution requirements, interface compatibility, and PCB layout changes.
What types of resolvers are these devices designed to interface with?
Both the AD2S1210CSTZ and the AD2S1200WST are designed to interface with variable reluctance (VR) resolvers. They provide excitation signals and process the sine and cosine feedback signals from the resolver to produce digital angle and velocity outputs.
Do both devices provide velocity output in addition to position data?
Yes. Both the AD2S1210CSTZ and the AD2S1200WST provide digital velocity output along with digital position (angle) output. The velocity output is derived from the resolver signals and is available through their respective parallel interfaces.