AD7863AR-10REEL - Dual 175 kSPS 14-Bit Simultaneous-Sampling ADC | Analog Devices
MPN: AD7863AR-10REEL ✓ Hoạt độngAD7863AR-10REEL Tóm tắt
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that converts real-world analog signals into discrete digital codes for processing by microcontrollers, DSPs, FPGAs, or ASICs. The SAR (successive-approximation register) architecture used in the AD7863AR-10 trades flash-level speed for extremely low power consumption and 14-bit resolution with no pipeline latency, making it ideal for multiplexed or simultaneous-sampling data-acquisition front ends. Within the broader IC taxonomy, this part is a precision ADC > data converter > signal-conditioning IC > analog mixed-signal IC.
Key specifications include 14-bit resolution, 175 kSPS throughput, a 5.2 µs conversion time per channel, ±10 V or ±2.5 V bipolar input ranges (or 0 V to 2.5 V pseudo-bipolar with the -10 variant; the -10 suffix here denotes the input range option), and single 5 V supply operation. The on-chip 2.5 V reference with two 0.1 µF bypass capacitors simplifies BOM and reduces board area. Dynamic AC performance is specified and tested for phased-array sonar, adaptive filtering, and spectrum-analysis applications.
Architecture details: each ADC channel uses a capacitive-DAC SAR core preceded by a track-and-hold amplifier that holds both channels simultaneously when the CONVST (conversion-start) signal is asserted, eliminating channel-to-channel skew. The high-speed parallel interface provides 14-bit data, BUSY, and end-of-conversion signaling, simplifying connection to DSPs and microcontrollers with parallel bus support such as the ADSP-21xx family.
Typical applications include three-phase motor control and power-line monitoring, multi-axis motion control, simultaneous-sampling instrumentation, vibration analysis, and phased-array sonar. The bipolar ±10 V input range allows direct sampling of industrial-level signals without external signal conditioning. For these uses, the key design advantage is deterministic dual-channel sampling latency — both ADCs sample the same instant, so vector math (Clarke/Park transforms) can be applied without correction.
When designing with the AD7863AR-10REEL, ensure adequate decoupling on AVDD and DVDD, and place the two 0.1 µF reference-bypass capacitors immediately adjacent to the VREF and AGND pins. The wide 28-SOIC footprint provides ample thermal headroom but routes BUSY, CONVST, and the parallel data bus carefully to avoid coupling into the analog inputs.
This page synthesizes distributor pricing, authoritative drop-in alternatives from the AD7863 family and competing 14-bit simultaneous-sampling ADCs, and practical layout/thermal notes that complement (and in some places extend) the information in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho AD7863AR-10REEL — 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 AD7863AR-10REEL (cùng hình factor và footprint) — khác nhau ở Conversion Time, Data Interface, Input Channels, Internal Reference, Package.
AD7863ARZ-10REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7863AR-10REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7863ARS-10REEL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7863ARZ-10
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7862AR-10
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7862ARS-2REEL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7863AR-10REEL Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 14 bits |
| Number of Channels | 4 analog inputs grouped into 2 simultaneous-sampling channels |
| Sampling Rate (per channel) | 175 kSPS |
| Conversion Time | 5.2 us |
| ADC Architecture | SAR (Successive Approximation), 2 ADCs with track/hold |
| Input Range | ±10 V (or ±2.5 V with -10 range option) |
| Điện áp cung cấp | Single 5 V |
| Internal Reference | 2.5 V (on-chip, with 0.1 uF bypass caps) |
| Data Interface | Parallel (14-bit) |
| Input Channels | 4 (2 per ADC, channel selected by A0) |
| Simultaneous Sampling | Yes (single CONVST triggers both ADCs) |
| Hộp | 28-SOIC (0.295 inch, 7.50 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Process Technology | LC2MOS (linear-compatible CMOS) |
| Packaging | Tape & Reel (REEL) |
Cấu hình chân AD7863AR-10REEL
| Chân 1 | DB0 — Parallel data bit 0 (LSB) |
| Chân 2 | DB1 — Parallel data bit 1 |
| Chân 3 | DB2 — Parallel data bit 2 |
| Chân 4 | DB3 — Parallel data bit 3 |
| Chân 5 | DB4 — Parallel data bit 4 |
| Chân 6 | DB5 — Parallel data bit 5 |
| Chân 7 | DB6 — Parallel data bit 6 |
| Chân 8 | DB7 — Parallel data bit 7 |
| Chân 9 | DB8 — Parallel data bit 8 |
| Chân 10 | DB9 — Parallel data bit 9 |
| Chân 11 | DB10 — Parallel data bit 10 |
| Chân 12 | DB11 — Parallel data bit 11 |
| Chân 13 | DB12 — Parallel data bit 12 |
| Chân 14 | DB13 — Parallel data bit 13 (MSB) |
| Chân 15 | STBY — Standby input (active low) |
| Chân 16 | RANGE — Analog input range select (per datasheet) |
| Chân 17 | CONVST — Conversion start — single edge triggers both ADCs |
| Chân 18 | BUSY — Output flag indicating conversion in progress |
| Chân 19 | EOC — End-of-conversion indicator (per datasheet) |
| Chân 20 | RD — Read input for parallel data bus |
| Chân 21 | A0 — Channel select (per datasheet; selects input pair/groups) |
| Chân 22 | DVDD — Digital 5 V supply |
| Chân 23 | DGND — Digital ground |
| Chân 24 | VREF — 2.5 V internal reference (bypass with 0.1 uF to AGND) |
| Chân 25 | AVDD — Analog 5 V supply |
| Chân 26 | AGND — Analog ground |
| Chân 27 | VA1+ — Channel A positive analog input |
| Chân 28 | VA1- — Channel A negative analog input |
Ứng dụng tiêu biểu
AD7863AR-10REEL phù hợp cho 6 Áp dụngs: Three-Phase Motor Control Current Sensing, Power-Line and Energy Metering, Phased-Array Sonar / Vibration Analysis, Multi-Axis Industrial Instrumentation, Adaptive Filtering and DSP Front-End, Spectrum Analyzer and Wideband Receiver IF Sampling.
Three-Phase Motor Control Current Sensing
The AD7863AR-10REEL's two simultaneous-sampling 14-bit SAR ADCs triggered by a single CONVST edge deliver two phase currents digitised at the same instant with picosecond-level skew, enabling accurate Clarke/Park transforms in field-oriented control (FOC) loops. Its ±10 V bipolar input range accepts standard 100 A / 50 mV shunt-derived signals after op-amp gain without external attenuation, and its 5.2 µs conversion time sustains 175 kSPS per phase, suiting servo drives, robotics, and CNC spindles. Because the device runs from a single 5 V rail, it co-exists with common MCU and DSP logic supplies, simplifying the BOM.
Được đề xuất
Power-Line and Energy Metering
Voltage and current on each phase of a three-phase AC bus can be sampled simultaneously by the AD7863AR-10REEL, allowing instantaneous real-power, apparent-power, and harmonic-distortion calculations. The internal 2.5 V reference and ±10 V range tolerate 120/240 V mains-derived signal levels after resistively-divided conditioning. Its 14-bit resolution (76 dB dynamic range) supports THD measurements down to 1 % with averaging; the parallel 14-bit interface feeds directly into industrial metering MCUs and energy-AFE coprocessors.
Được đề xuất
Phased-Array Sonar / Vibration Analysis
Channels of a multielement hydrophone array must be sampled at the same instant so beamforming delays can be applied without per-channel phase correction; the AD7863AR-10REEL's pair of simultaneous-sampling SAR ADCs performs this role per 2-channel tile in larger arrays. Its 14-bit resolution and low analog input bandwidth preserve sonar-channel dynamic range down to ambient-sea-noise floor. For two-axis vibration and modal-analysis systems, the same dual-channel IC digitizes accelerometer outputs from each axis simultaneously, eliminating instrumentation skew.
Được đề xuất
Multi-Axis Industrial Instrumentation
Multi-axis strain-gauge and load-cell digitisation systems rely on simultaneous channel sampling so that derived position, force, and torque vectors remain phase-true. The AD7863AR-10REEL digitises two Wheatstone-bridge signals at up to 175 kSPS each, while its parallel interface feeds the controlling DSP directly without a serial-port bottleneck. Internal 2.5 V reference simplifies the analog front end; 0.1 µF reference-bypass caps keep the noise floor low enough for 14-bit effective resolution at unity gain.
Được đề xuất
Adaptive Filtering and DSP Front-End
Adaptive filters (LMS, RLS, Kalman) require two synchronously-sampled inputs for input-versus-reference error-correction topologies. The AD7863AR-10REEL provides this synchronous pair at 175 kSPS, supporting acoustic-echo-canceller and active-noise-control front ends up to ~70 kHz signal bandwidth. Its deterministic SAR conversion (no pipeline latency) preserves filter stability and convergence rate. The 14-bit parallel bus streams data straight into ADSP-21xxx or SHARC processor memory for sample-by-sample DSP.
Được đề xuất
Spectrum Analyzer and Wideband Receiver IF Sampling
In a wideband-receiver or spectrum-analyzer IF chain at 10 MHz IF frequencies, the AD7863AR-10REEL can be configured for ±2.5 V input range and operated at the upper end of its 175 kSPS envelope to alias-fold wider IF spectra under analysis. Simultaneous I/Q sampling with matched sample-time eliminates quadrature errors that would otherwise lift the image-rejection floor of the analyzer by tens of dB. The on-chip 2.5 V reference keeps noise low and phase-stable across the signal band.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7863AR-10REEL — 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 | AD7863ARZ-10REEL7 | AD7863AR-10REEL7 | AD7863ARS-10REEL | AD7863ARZ-10 | AD7862AR-10 | AD7862ARS-2REEL |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (0.295 inch, 7.50 mm wide) | 28-SOIC (0.295 inch, 7.50 mm wide) - same | 28-SOIC (0.295 inch, 7.50 mm wide) - same | 28-SSOP (5.30 mm wide) - narrower | 28-SOIC (0.295 inch, 7.50 mm wide) - same | 28-SOIC (0.295 inch, 7.50 mm wide) - same | 28-SSOP (5.30 mm wide) - narrower |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits | 12 bits |
| Channels | 2 simultaneous-sampling (4 inputs) | 2 simultaneous-sampling (4 inputs) | 2 simultaneous-sampling (4 inputs) | 2 simultaneous-sampling (4 inputs) | 2 simultaneous-sampling (4 inputs) | 1 single channel | 1 single channel |
| Throughput per Channel | 175 kSPS | 175 kSPS | 175 kSPS | 175 kSPS | 175 kSPS | 250 kSPS (single channel) | 250 kSPS (single channel) |
| Input Range | ±10 V or ±2.5 V | ±10 V or ±2.5 V | ±10 V or ±2.5 V | ±10 V or ±2.5 V | ±10 V or ±2.5 V | ±10 V (single range) | ±5 V |
| Conversion Time | 5.2 us | 5.2 us | 5.2 us | 5.2 us | 5.2 us | 4 us | 4 us |
| Supply Voltage | Single 5 V | Single 5 V | Single 5 V | Single 5 V | Single 5 V | Single 5 V | Single 5 V |
| Internal Reference | 2.5 V (on-chip) | 2.5 V (on-chip) | 2.5 V (on-chip) | 2.5 V (on-chip) | 2.5 V (on-chip) | 2.5 V (on-chip) | 2.5 V (on-chip) |
Bảo phân biệt quan trọng
- Two simultaneous-sampling ADCs on a single 5 V supply in a 28-SOIC (vsAD7862AR-10)
- Internal 2.5 V reference eliminates external reference BOM (vsAD7863ARZ-10REEL7 (same die))
- Wide 28-SOIC wide-body footprint simplifies hand-prototyping (vsAD7863ARS-10REEL (28-SSOP, 5.30 mm))
Ghi chú thiết kế
Per the Analog Devices AD7863 datasheet, place two 0.1 µF ceramic bypass capacitors immediately adjacent to the VREF pin and AGND, with short, direct traces and via-free routing. Place 10 µF tantalum and 0.1 µF ceramic pairs on both AVDD and DVDD near the IC, and keep AVss / DGND separation short to the ground plane. Route analog inputs (VA1±) on a separate layer from the 14-bit parallel digital bus, with a ground-plane shield under the bus to minimise digital-switching noise coupling into the ADC inputs at full-scale.
Ensure that the CONVST signal is a single, fast-edge transition (not a low-frequency pulse train). The AD7863 SAR ADCs sample on the rising edge of CONVST; noisy or slow CONVST edges cause aperture jitter that directly converts to ADC SNR loss. Do not connect VA1+ and VA1- to ground simultaneously — the bipolar input structure demands the common-mode voltage remain within ±5 V of AGND for ±10 V range. Failure to bypass DVDD with a 0.1 µF cap near the package can produce bus-feedback patterns at the DB[13:0] outputs.
Keep the analog input traces (VA1+, VA1-, plus the second channel's inputs if used) matched in length and symmetrically routed, ideally surrounded by a ground guard ring tied to AGND, to maximise common-mode rejection at high frequencies. Star-route the AGND and DGND returns to a single point near the ground pin of the input op-amp. For the 28-SOIC wide-body footprint (0.295 inch / 7.50 mm), ensure that the PCB pad-to-trace transition is sized for 50 Ω characteristic impedance if the analog input runs longer than ~25 mm.
Thông tin tuân thủ
RoHS / REACH / AEC-Q100 status not stated in the verified sources. The R suffix Z vs. non-Z distinguishes ADI finish; the AD7863ARZ-10REEL7 is the RoHS-compliant variant — the AD7863AR-10REEL is the older non-Z finish variant. AEC-Q100 is not applicable for industrial-grade ADCs of this generation. [DATA_NEEDED] for definitive compliance attestations.