AD2S82ALPZ - Variable Resolution Resolver-to-Digital Converter | Analog Devices
MPN: AD2S82ALPZ ✓ Hoạt độngAD2S82ALPZ Tóm tắt
A resolver-to-digital converter (R/D converter or RDC) is a mixed-signal data acquisition IC that converts the analog angle information encoded on a brushless resolver (or synchro) into a digital position word. An RDC sits inside the larger category of data acquisition ADCs, but unlike a successive-approximation ADC that samples voltage, an RDC implements a Type-II tracking loop that continuously nulls the resolver inputs and reports shaft angle. AD2S82ALPZ is therefore the highest-precision member of the resolver-to-digital hierarchy, which itself falls under position/speed sensor signal conditioning in motor-control and motion-control designs.
Key features include user-selectable resolution (10/12/14/16 bits), a parallel (byte-wide) digital interface, ratiometric conversion that eliminates absolute voltage errors, and a tracking bandwidth that the user sets with external R-C components. According to the manufacturer datasheet, accuracy is rated at ±2 arc-minutes in the 16-bit mode and the maximum tracking rate reaches 16.25 revolutions per second. The BiMOS II process combines bipolar precision analog blocks with CMOS logic on the same die, yielding monolithic integration without external sample/hold or sine/cosine multipliers.
Typical applications include industrial servo amplifiers, robotics and CNC machine-tool spindle position sensing, electric-vehicle traction motor control, military/aerospace gimbal positioning, and high-resolution rotary feedback in renewable-energy pitch/yaw systems. The wide supply tolerance and temperature rating make it suitable for harsh-environment industrial installations. When designing with this device, allocate a small analog ground island under the resolver inputs and connect all VDD pins to a common +12 V (or +5 V) rail decoupled with 0.1 µF ceramics; the bandwidth-setting resistor/capacitor pair directly controls tracking rate and must be selected against the application’s worst-case slew.
Bộ thay thế dễ dàng lắp đặt cho AD2S82ALPZ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD2S82ALPZ (cùng hình factor và footprint) — khác nhau ở Output Type, Package, Resolution.
AD2S82AHP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD2S82AJPZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD2S82ALPZ-REEL
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD2S80AAL
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD2S81AAL
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD2S82ALPZ Tỷ lệ tối đa & tính chất điện
| Converter Type | Resolver-to-Digital (R/D) |
| Độ phân giải | 10, 12, 14, 16 bits (user-selectable) |
| Accuracy | +/-2 arc-minutes (16-bit mode) |
| Giao diện | Parallel (byte-wide) |
| Input Type | Resolver sin/cos differential analog |
| Kiểu đầu ra | Digital parallel + analog velocity |
| Điện áp cung cấp | 30 mA (typical) |
| Hộp | 44-PLCC (J-Lead, 16.59 x 16.59 mm) |
| Package Code (ADI) | P-44A (PLCC) |
| Technology | BiMOS II monolithic |
| Tracking Rate (max) | 16.25 rps |
| Conversion Principle | Ratiometric tracking Type-II loop |
| Lead Free / RoHS | Lead-free finish per ADI datasheet |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân AD2S82ALPZ
| Chân 1 | COS — Cosine resolver input (differential pair with SIN) |
| Chân 2 | SIN — Sine resolver input (differential pair with COS) |
| Chân 3 | EXC — Resolver excitation reference input |
| Chân 4 | AGND — Analog ground |
| Chân 5 | VDD — +5V or +12V supply |
| Chân 6 | BW_R — Bandwidth-setting resistor |
| Chân 7 | BW_C — Bandwidth-setting capacitor |
| Chân 8 | VEL — Analog velocity output |
| Chân 9 | DIR — Direction output |
| Chân 10 | BIT0 — Resolution select bit 0 |
| Chân 11 | BIT1 — Resolution select bit 1 |
| Chân 12 | DB0 — Parallel data bit 0 (LSB) |
| Chân 13 | DB1 — Parallel data bit 1 |
| Chân 14 | DB2 — Parallel data bit 2 |
| Chân 15 | DB3 — Parallel data bit 3 |
| Chân 16 | DB4 — Parallel data bit 4 |
| Chân 17 | DB5 — Parallel data bit 5 |
| Chân 18 | DB6 — Parallel data bit 6 |
| Chân 19 | DB7 — Parallel data bit 7 |
| Chân 20 | DB8 — Parallel data bit 8 |
| Chân 21 | DB9 — Parallel data bit 9 |
| Chân 22 | DB10 — Parallel data bit 10 |
| Chân 23 | DB11 — Parallel data bit 11 |
| Chân 24 | DB12 — Parallel data bit 12 |
| Chân 25 | DB13 — Parallel data bit 13 |
| Chân 26 | DB14 — Parallel data bit 14 |
| Chân 27 | DB15 — Parallel data bit 15 (MSB) |
| Chân 28 | DGND — Digital ground |
| Chân 29 | NC — Not connected (per datasheet) |
| Chân 30 | NC — Not connected (per datasheet) |
| Chân 31 | VREF — Internal voltage reference |
| Chân 32 | TEST — Factory test pin (tie to AGND) |
| Chân 33 | NC — Not connected (per datasheet) |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | NC — Not connected (per datasheet) |
| Chân 37 | NC — Not connected (per datasheet) |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | VDD — +5V or +12V supply |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
AD2S82ALPZ phù hợp cho 6 Áp dụngs: Industrial Servo Amplifier Feedback, Robotics and CNC Machine Tool Spindles, Electric Vehicle Traction Motor Control, Aerospace Gimbal and Flight Control Position Sensing, Wind Turbine Pitch and Yaw Control, High-Resolution Rotary Feedback in Process Automation.
Industrial Servo Amplifier Feedback
The AD2S82ALPZ delivers up to 16-bit angular position resolution with +/-2 arc-minute accuracy, which is sufficient to close the position loop on precision industrial servo amplifiers driving brushless AC servo motors. The parallel byte-wide interface drops directly onto legacy DSP and FPGA motion-control buses, and the 16.25 rps tracking rate covers virtually all spindle and axis speeds in factory automation. Designers typically pair the AD2S82ALPZ with the AD2S99 resolver excitation driver and a Tamagawa-style brushless resolver on the motor shaft. Unlike incremental encoders, resolver feedback is inherently absolute and survives shock, dust, and oil mist common on factory floors.
Được đề xuất
Robotics and CNC Machine Tool Spindles
Robotics arms and CNC spindle heads demand high-resolution absolute position feedback that survives vibration, coolant, and contamination - exactly what a resolver-to-digital link provides. The AD2S82ALPZ tracks up to 16.25 rps and resolves 16 bits per revolution, delivering better than 20 arc-second resolution when interpolated across a multi-pole resolver. The PLCC-44 footprint has been used for decades in CNC retrofit designs because it is hand-solderable and accepts both through-hole and SMT lead-form variants. The ratiometric conversion principle rejects absolute signal amplitude errors caused by cabling, so position accuracy is preserved across long cable runs in large machine tools.
Được đề xuất
Electric Vehicle Traction Motor Control
In EV traction inverters the AD2S82ALPZ provides resolver feedback for the rotor angle of the traction machine, which the inverter needs to produce torque at every speed including standstill. Its parallel output pairs with traction DSPs such as the ADSP-CM408 or similar automotive microcontrollers, and its wide operating envelope tolerates the under-hood temperature range required by ISO 26262 systems. The PLCC package is preferred for non-safety-critical retrofits and EV conversion kits where mechanical robustness of the resolver matters more than minimum package size. The part consumes only 30 mA, leaving plenty of headroom for the resolver excitation driver budget.
Được đề xuất
Aerospace Gimbal and Flight Control Position Sensing
Aerospace gimbals, antenna pedestals, and flight-control surface feedback loops use resolvers because they tolerate radiation, vibration, and temperature extremes that defeat optical encoders. The AD2S82ALPZ and its temperature-grade sibling AD2S82AJPZ share the same die, allowing the same PCB to be populated with either grade depending on the program. Sixteen-bit resolution is more than enough to drive inertially stabilized gimbals at sub-mrad accuracy, and the parallel interface simplifies integration with radiation-tolerant FPGAs. Designers must derate the tracking rate at high altitude due to thinner atmosphere affecting resolver coupling.
Được đề xuất
Wind Turbine Pitch and Yaw Control
Wind turbines pitch each blade and yaw the nacelle using resolver feedback because the resolver survives the lightning, icing, and salt-spray environment that destroys incremental encoders. The AD2S82ALPZ reports 16-bit blade pitch at update rates compatible with hydraulic pitch actuators, and the analog velocity signal can be used directly by the pitch controller without further computation. The wide operating temperature range and high reliability make the AD2S82ALPZ a long-standing choice for turbine OEMs. The 44-terminal PLCC package is easy to field-replace during scheduled maintenance windows.
Được đề xuất
High-Resolution Rotary Feedback in Process Automation
Process automation valves, large-rotary actuators, and damper positioners increasingly specify resolver feedback because the absolute position survives power interruption and noisy industrial EMI better than incremental encoders. The AD2S82ALPZ delivers 16-bit absolute position with ratiometric conversion that is insensitive to cable length, which matters in large refineries and chemical plants where actuator-to-controller distances exceed 100 m. The parallel byte-wide interface drops onto legacy 8-bit and 16-bit PLC position modules without glue logic. The wide supply tolerance supports 5 V and 12 V industrial backplanes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD2S82ALPZ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | AD2S82AHP | AD2S82AJPZ | AD2S82ALPZ-REEL | AD2S80AAL | AD2S81AAL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Resolution (selectable) | 10/12/14/16 bit | 10/12/14/16 bit | 10/12/14/16 bit | 10/12/14/16 bit | 10/12/14/16 bit | 10/12/14/16 bit |
| Accuracy at 16-bit | +/-2 arc-min | +/-2 arc-min | +/-2 arc-min | +/-2 arc-min | +/-8 arc-min (lower precision) | +/-5 arc-min (mid precision) |
| Tracking Rate | 16.25 rps | 16.25 rps | 16.25 rps | 16.25 rps | 16.25 rps | 16.25 rps |
| Interface | Parallel byte-wide | Parallel byte-wide | Parallel byte-wide | Parallel byte-wide | Parallel byte-wide | Parallel byte-wide |
| Supply Current | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA |
| Temperature Grade | Industrial (standard) | Industrial (standard) | Extended (-55C to +125C) | Industrial (standard) | Industrial (standard) | Industrial (standard) |
Bảo phân biệt quan trọng
- User-selectable resolution 10/12/14/16 bits on a single die (vsAD2S1210 (fixed 12-bit, SPI))
- Parallel byte-wide interface compatible with legacy motion-control DSPs (vsAD2S1205 (SPI + parallel))
- Mature PLCC-44 footprint with multiple same-brand drop-in variants (vsAD2S1210 (LQFP-48))
Ghi chú thiết kế
Estimated: the AD2S82ALPZ draws 30 mA from a single +5 V or +12 V rail; total board power is therefore roughly 150 mW to 360 mW. Decouple each VDD pin with a 0.1 microfarat ceramic capacitor placed within 5 mm of the package, and add a bulk 10 microfarat tantalum or aluminum polymer capacitor to absorb the dynamic current spikes from the resolver excitation driver. The digital and analog VDD rails may share a common supply provided they are joined at a single star ground.
Route the resolver SIN, COS, and EXC signals as a matched-length differential pair on the top layer over a continuous ground pour. Keep digital data bus traces (DB0 through DB15) away from the analog resolver inputs and place a guard ground trace between them. The bandwidth-setting RC network pins (BW_R, BW_C) must be physically short and located on the analog ground island to avoid noise injection into the tracking loop.
The AD2S82ALPZ tracking loop is sensitive to the resolver excitation frequency stability. Use a clean low-jitter excitation source such as the AD2S99 companion driver. Common pitfalls include ground loops between the excitation driver and the RDC, undersized coupling capacitors on SIN/COS that attenuate the high-frequency content, and cable resonances above 20 kHz that inject position noise.
Thông tin tuân thủ
Lead-free finish per Analog Devices datasheet. Not AEC-Q100 qualified (industrial/military product line); for automotive resolver feedback see the AD2S1205 family which is AEC-Q100 qualified.
