AD7863ARSZ-10REEL - 14-Bit 175kSPS Dual Simultaneous-Sampling ADC | ADI
MPN： AD7863ARSZ-10REEL ✗ 停產AD7863ARSZ-10REEL 概覽
A successive-approximation register (SAR) ADC is a binary-search converter that compares the sampled input against an internal DAC, resolving one bit per clock cycle. SAR ADCs are prized for their deterministic latency, intrinsic anti-alias filtering (no switching ripple), and excellent DC linearity - characteristics that make the AD7863 particularly well suited to digitising sinusoidal signals, transducer outputs, and motor-control feedback. Within the broader taxonomy, the AD7863 sits at: ADC -> SAR ADC -> data converter -> signal-chain IC -> semiconductor.
Key differentiating features include the simultaneous-sampling dual-channel topology, integrated 2.5 V reference (eliminating an external reference in many designs), low 50 mW typical power consumption from a single 5 V supply, and a high-speed parallel bus that simplifies connection to DSPs, FPGAs, and microcontrollers. The -10 speed grade is the 175 kSPS through-rate variant and is specified across the -40C to +85C industrial temperature range.
Typical applications include three-phase motor control and power-line monitoring, instrumentation and data acquisition systems, multi-axis inertial measurement, industrial process control, and medical patient monitoring where synchronised channel capture is required. The internal reference plus parallel bus keeps the BOM small while preserving measurement integrity.
直接替換替代品，適用於 AD7863ARSZ-10REEL — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD7863ARSZ-10REEL （相同外形與佔位） — 差異在於 Conversion Time, Input Type, Internal Reference, Number of Channels, Package.
AD7863ARSZ-10REEL7
✅ 直接替換📋 參考替代品（不在目錄中）
AD7863ARSZ-10
✅ 直接替換📋 參考替代品（不在目錄中）
AD7863ARSZ-2REEL
✅ 直接替換📋 參考替代品（不在目錄中）
AD7863ARSZ-3
✅ 直接替換📋 參考替代品（不在目錄中）
AD7863ARSZ-10REEL 最大額定值與電氣特性
| 解析度 | 14 bit |
| Sample Rate | 175 kSPS per channel |
| Number of Channels | 2 (simultaneous sampling) / 4 inputs (2:1 mux) |
| ADC Architecture | SAR (Successive Approximation) |
| Conversion Time | 5.2 us per channel |
| Input Type | Single-ended, 4 analog inputs via A0 selection |
| 供應電壓 | 5 V single supply |
| Power Consumption | 50 mW typical |
| Internal Reference | 2.5 V (integrated) |
| 介面 | High-speed parallel |
| Track/Hold Amplifiers | 2 (integrated, matched) |
| 工作溫度 | -40C to +85C |
| 封裝 | 28-pin SSOP (5.30 mm body) |
| 安裝類型 | Surface Mount |
| Lead Free / RoHS | Yes (LEAD FREE per datasheet) |
| Conversion Start | Single CONVST signal latches both channels |
| BUSY Indicator | Yes |
| Process Technology | LC2MOS (linear-compatible CMOS) |
AD7863ARSZ-10REEL 腳位配置
| 腳位 1 | VA1 — Analog input A, channel 1 |
| 腳位 2 | VA2 — Analog input A, channel 2 |
| 腳位 3 | VB1 — Analog input B, channel 1 |
| 腳位 4 | VB2 — Analog input B, channel 2 |
| 腳位 5 | AGND — Analog ground |
| 腳位 6 | REFIN/REFOUT — Internal 2.5 V reference input/output |
| 腳位 7 | A0 — Channel select input (logic low = ch1, high = ch2) |
| 腳位 8 | CONVST — Conversion start (active edge initiates both ADCs) |
| 腳位 9 | BUSY — Conversion in progress indicator (active high) |
| 腳位 10 | CS — Chip select (active low) |
| 腳位 11 | RD — Read enable (active low) |
| 腳位 12 | DB13 — Data bit 13 (MSB) |
| 腳位 13 | DB12 — Data bit 12 |
| 腳位 14 | DB11 — Data bit 11 |
| 腳位 15 | DB10 — Data bit 10 |
| 腳位 16 | DB9 — Data bit 9 |
| 腳位 17 | DB8 — Data bit 8 |
| 腳位 18 | DB7 — Data bit 7 |
| 腳位 19 | DB6 — Data bit 6 |
| 腳位 20 | DB5 — Data bit 5 |
| 腳位 21 | DB4 — Data bit 4 |
| 腳位 22 | DB3 — Data bit 3 |
| 腳位 23 | DB2 — Data bit 2 |
| 腳位 24 | DB1 — Data bit 1 |
| 腳位 25 | DB0 — Data bit 0 (LSB) |
| 腳位 26 | DGND — Digital ground |
| 腳位 27 | VDD — Digital 5 V supply |
| 腳位 28 | VCC — Analog 5 V supply |
典型應用
AD7863ARSZ-10REEL 適用於 6 應用s: Three-Phase Motor Control & Power-Line Monitoring, Multi-Axis Inertial Measurement & IMU Front-Ends, Industrial Data Acquisition & Process Control, Medical Patient Monitoring (ECG, EEG Front-End), Test & Measurement Instrumentation, Uninterruptible Power Supply (UPS) Monitoring.
Three-Phase Motor Control & Power-Line Monitoring
The AD7863ARSZ-10REEL's dual simultaneous-sampling SAR channels capture two phase currents or voltages at the exact same instant, preserving phase relationship for accurate power calculations. With 14-bit resolution, 175 kSPS per channel, and 5.2 us conversion time, the device comfortably digitises PWM-modulated waveforms above 50 kHz. Its single 5 V supply simplifies board design, while the parallel interface streams samples directly into a DSP or MCU running a Clarke/Park transform.
推薦
Multi-Axis Inertial Measurement & IMU Front-Ends
Inertial measurement requires simultaneous capture of two or more sensor axes to avoid skew error. The AD7863ARSZ-10REEL samples two accelerometer/gyroscope outputs in lockstep on a single CONVST edge, eliminating inter-axis timing distortion. Its integrated 2.5 V reference removes drift uncertainty, and 14-bit resolution provides sufficient dynamic range for vibration analysis on MEMS accelerometers producing 0-2.5 V outputs.
推薦
Industrial Data Acquisition & Process Control
Factory automation systems digitise multiple 4-20 mA or 0-10 V transducer signals at hundreds of Hz. The AD7863ARSZ-10REEL handles four analog inputs (two channels of two mux'd inputs) at 175 kSPS - far above typical industrial loop rates - leaving headroom for oversampling and digital filtering. The parallel bus interfaces cleanly to FPGAs/ASICs implementing channel aggregation, and the SSOP-28 footprint suits compact PLC analog input cards.
推薦
Medical Patient Monitoring (ECG, EEG Front-End)
Medical instrumentation demands simultaneous capture of multiple biopotential channels to preserve waveform phase and timing relationships critical for diagnostic algorithms. The AD7863ARSZ-10REEL's two-channel simultaneous sampling, 14-bit resolution, and 5.2 us conversion time suit ECG/EEG front-ends digitising signals in the 0.05 Hz to 1 kHz band. The low 50 mW power dissipation helps manage thermal load in bedside monitors.
推薦
Test & Measurement Instrumentation
Bench-top instruments such as oscilloscope front-ends and power analysers need synchronised dual-channel acquisition. The AD7863ARSZ-10REEL delivers two matched 14-bit samples per CONVST cycle, with the integrated 2.5 V reference reducing calibration burden. The parallel bus streams data directly to a display controller FPGA. Operating across -40C to +85C, the part is suitable for laboratory and field-portable test equipment.
推薦
Uninterruptible Power Supply (UPS) Monitoring
UPS and inverter systems monitor AC mains voltage and current to compute true RMS power and detect faults. The AD7863ARSZ-10REEL samples voltage and current waveforms simultaneously at 175 kSPS, allowing reconstruction of the full 50/60 Hz waveform plus harmonics up to the kHz range. The single 5 V supply matches the digital logic rails common in UPS controllers, simplifying power architecture.
推薦
推薦產品摘要
工程參考資料，適用於 AD7863ARSZ-10REEL — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD7863ARSZ-10REEL7 | AD7863ARSZ-10 | AD7863ARSZ-2REEL | AD7863ARSZ-3 |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Channels (simultaneous sampling) | 2 | 2 | 2 | 2 | 2 |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Supply Voltage | 5 V single | 5 V single | 5 V single | 5 V single | 5 V single |
| Reel/Packaging | 13-inch T&R | 7-inch T&R | Tube | 13-inch T&R | Tube |
主要差異化特點
- True simultaneous dual-channel sampling on a single CONVST edge (對比Generic dual-channel ADCs that channel-multiplex in series)
- Integrated 2.5 V reference and matched track/hold amplifiers (對比Discrete ADC + external reference designs)
- 14-bit parallel bus with simple MCU/FPGA handshake (對比Serial-interface SAR ADCs (e.g., SPI-driven parts))
設計說明
Power the AD7863ARSZ-10REEL from a single 5 V supply; use separate analog (VCC) and digital (VDD) pins that should be tied to filtered, decoupled rails. Place 100 nF ceramic bypass capacitors close to each supply pin and a 10 uF tantalum or ceramic bulk cap near the IC. Estimated: at 5 V and 50 mW typical, total supply current is approximately 10 mA - ensure the 5 V regulator has at least 50 mA headroom for transient load steps on VDD during parallel bus activity.
Route analog inputs and reference pins on the inner PCB layers with a continuous ground pour directly beneath the SSOP-28 footprint. Separate AGND and DGND and join them at a single point near the IC's analog ground pin. Keep parallel digital data bus traces (DB0-DB13) away from analog input traces to avoid digital-to-analog coupling; the high-speed parallel bus edges are the primary noise source.
Do not apply analog input voltages outside the AD7863's input common-mode range before the track/hold settles; damage can occur at overvoltage. Always drive CONVST with a clean digital edge - a slow edge can cause inconsistent sampling times between channels and defeat the simultaneous-sampling benefit. Decouple the REFIN/REFOUT pin with at least 100 nF when using the internal reference to filter noise.
合規資訊
LEAD FREE per digchips datasheet snippet. RoHS compliance indicated by ADI product status. AEC-Q100 not applicable (industrial-grade ADC).
