AD7863ARSZ-3REEL - Dual 14-Bit 175 kSPS ADC | Analog Devices
N.º de pieza: AD7863ARSZ-3REEL ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $37.9 | $37,90 |
| 10 | $34.11 | $341,10 |
| 100 | $30.32 | $3.032,00 |
| 500 | $27.29 | $13.645,00 |
| 1.000 | $24.25 | $24.250,00 |
AD7863ARSZ-3REEL Descripción general
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes. Within the converter hierarchy, successive-approximation register (SAR) ADCs occupy the mid-speed, mid-resolution niche, prized for low latency, deterministic acquisition, and excellent dc accuracy. Simultaneous-sampling SAR ADCs such as the AD7863 capture two channels at exactly the same instant, which is critical for phase-coherent measurements in motor control, power conversion, and instrumentation where vector relationships between signals must be preserved.
Key features include four analog input channels arranged as two channel pairs (VA1/VA2 and VB1/VB2), true bipolar input ranges of +/-10 V or +/-5 V (variant dependent -3 is the +/-10 V range), 14-bit resolution with no missing codes, 175 kSPS throughput per ADC, and 5.2 microsecond acquisition time. The internal 2.5 V reference is laser-trimmed for low drift and may be overdriven by an external reference when system-level calibration demands it. Throughput is doubled relative to single-channel architectures because both ADCs sample and convert in parallel.
Fabricated in Analog Devices' LC2MOS mixed process, which combines bipolar precision circuits with low-power CMOS logic, the AD7863 achieves high dynamic performance including 80 dB SNR and 90 dB channel-to-channel isolation at the input frequency band. These ac specifications support demanding signal-processing applications such as phased-array sonar, adaptive filters, and spectrum analysis. The parallel interface is directly compatible with standard DSPs and microcontrollers, simplifying system integration.
Typical applications include three-phase motor control and power-line monitoring where simultaneous current and voltage sampling is mandatory, multi-axis industrial servo drives, data acquisition systems, and instrumentation requiring synchronized multi-channel measurement. The wide bipolar input range allows direct connection to current shunts, voltage dividers, and transducer bridges without external signal conditioning.
Designers should evaluate input common-mode considerations when both channels must reject the same noise, and consider the internal reference bypass requirement of 0.1 microfarad ceramic capacitors on VREF to AGND. The SSOP-28 footprint is footprint-compatible with the AD7863ARZ-3 (SOIC-28) at the schematic level only - PCB layout differs because of the narrower body width.
This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single decision-ready reference for sourcing and replacement.
Alternativas directas para AD7863ARSZ-3REEL — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con AD7863ARSZ-3REEL (mismo factor de forma y huella) — difiere en Conversion Time, Input Type, Internal Reference, Number of Channels, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
AD7863ARSZ-2REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7863ARSZ-3REEL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7863ARSZ-2REEL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7863ARSZ-10REEL
✅ Sustitución directa✓ En stock
$13.2 / unidad
Ver hoja de datos →AD7863ARSZ-10REEL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7863ARSZ-3REEL Valores máximos y características eléctricas
| Resolución | 14 bits |
| Number of Channels | 4 Input / 2 ADC (2 pairs) |
| Frecuencia de muestreo | 175 kSPS per ADC |
| Architecture | SAR (Successive Approximation) |
| Conversion Time | 5.2 microseconds |
| Input Type | Single-Ended, Bipolar |
| Input Voltage Range (variant -3) | +/-10 V |
| Tensión de alimentación | 5 V single supply |
| Internal Reference | 2.5 V (on-chip) |
| Reference Type | Internal or External (overdrive capable) |
| Data Interface | Parallel |
| Signal-to-Noise Ratio (SNR) | 80 dB |
| Channel-to-Channel Isolation | 90 dB |
| Rango de temperatura de funcionamiento | -40C to +85C (industrial) |
| Encapsulado | 28-SSOP (Shrink Small Outline Package) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Lead-Free / Pb-Free | Yes |
| Process Technology | LC2MOS (linear compatible CMOS) |
Configuración de pines de AD7863ARSZ-3REEL
| Pin 1 | VA1 — Analog input A1 (channel pair A) |
| Pin 2 | VA2 — Analog input A2 (channel pair A) |
| Pin 3 | VB1 — Analog input B1 (channel pair B) |
| Pin 4 | VB2 — Analog input B2 (channel pair B) |
| Pin 5 | AGND — Analog ground |
| Pin 6 | VDD — +5 V analog supply |
| Pin 7 | REFOUT — 2.5 V internal reference output |
| Pin 8 | REFIN — Reference input (tie to REFOUT or external ref) |
| Pin 9 | AGND — Analog ground |
| Pin 10 | CONVST — Conversion start input |
| Pin 11 | CS — Chip select (active low) |
| Pin 12 | RD — Read input (active low) |
| Pin 13 | BUSY — Busy output (high during conversion) |
| Pin 14 | DGND — Digital ground |
| Pin 15 | DB0 — Data bit 0 (LSB) |
| Pin 16 | DB1 — Data bit 1 |
| Pin 17 | DB2 — Data bit 2 |
| Pin 18 | DB3 — Data bit 3 |
| Pin 19 | DB4 — Data bit 4 |
| Pin 20 | DB5 — Data bit 5 |
| Pin 21 | DB6 — Data bit 6 |
| Pin 22 | DB7 — Data bit 7 |
| Pin 23 | DB8 — Data bit 8 |
| Pin 24 | DB9 — Data bit 9 |
| Pin 25 | DB10 — Data bit 10 |
| Pin 26 | DB11 — Data bit 11 |
| Pin 27 | DB12/DOUTA — Data bit 12 / Channel A data |
| Pin 28 | DB13/DOUTB — Data bit 13 (MSB) / Channel B data |
Aplicaciones típicas
AD7863ARSZ-3REEL es adecuado para 6 aplicacións: Three-Phase Motor Control, Power-Line Monitoring and Energy Metering, Multi-Axis Servo Drives, Industrial Data Acquisition Systems, Phased-Array Sonar and Adaptive Filters, Spectrum Analysis and RF Test Instrumentation.
Three-Phase Motor Control
The AD7863ARSZ-3REEL is well matched to three-phase motor control loops because its two ADCs sample simultaneously, preserving the phase relationship between current and voltage feedback signals that drives vector-control (FOC) algorithms. The +/-10 V bipolar input range directly interfaces with current-shunt amplifiers and voltage dividers on the DC bus without external level shifting, while 14-bit resolution and 5.2 microsecond conversion time support PWM frequencies up to 20 kHz with sub-microsecond latency. Its 28-SSOP footprint fits compact inverter boards used in industrial servo drives and small-format variable-frequency drives. The internal 2.5 V reference and parallel interface simplify the connection to dedicated motor-control DSPs. In contrast to integrated motor-control MCUs, the AD7863 allows the designer to pair it with an external isolation barrier and high-performance control processor.
Recomendado
Power-Line Monitoring and Energy Metering
For three-phase power-line monitoring, the AD7863ARSZ-3REEL provides the simultaneous current-and-voltage sampling required for accurate real-power and reactive-power computation. Each of the two ADCs captures its channel pair at the exact same instant, eliminating skew errors that would otherwise corrupt phasor measurements on 50 Hz and 60 Hz mains. The +/-10 V input range matches the output of typical voltage-divider and current-transformer signal-conditioning chains, so no extra gain stage is needed. 80 dB SNR allows accurate harmonic analysis up to the 40th harmonic, which is essential for power-quality monitoring and IEEE 519 compliance verification. The 175 kSPS per-channel rate also captures fast transient events such as capacitor-switching surges and lightning-induced disturbances. The 28-SSOP package footprint suits compact revenue-grade and sub-metering designs.
Recomendado
Multi-Axis Servo Drives
Multi-axis servo drives require synchronized sampling of position, current, and velocity feedback across multiple axes, and the AD7863ARSZ-3REEL delivers this with its two simultaneous-sampling 14-bit ADCs. Each axis typically uses one channel pair for current sensing plus a position-feedback input, and multiple AD7863 devices can be synchronized through their CONVST pins to expand channel count without losing simultaneity. The 5.2 microsecond conversion time supports current-loop bandwidths well above 10 kHz, while 14-bit resolution provides adequate torque-ripple resolution for high-precision CNC and robotics applications. The 5 V single-supply operation simplifies the auxiliary analog rail design in industrial servo systems. Designers should pair the AD7863 with a dedicated DSP or FPGA for the cascaded position-velocity-current control loops.
Recomendado
Industrial Data Acquisition Systems
The AD7863ARSZ-3REEL fits 4-channel industrial data acquisition modules where compact size, deterministic latency, and simultaneous sampling are priorities. Its two channel pairs capture four single-ended bipolar signals at up to 175 kSPS each, which is sufficient for vibration monitoring, acoustic emission testing, and structural-health monitoring applications. The parallel digital interface connects directly to standard microcontrollers and FPGAs without glue logic, reducing BOM cost and design complexity. The wide +/-10 V input range accepts outputs from industrial sensors such as strain gauges, load cells, and piezoelectric accelerometers after signal conditioning. The 28-SSOP package allows high-density channel-per-board layouts in modular DAQ cards and rack-mounted instrumentation.
Recomendado
Phased-Array Sonar and Adaptive Filters
Phased-array sonar and adaptive-filter signal-processing systems rely on the AD7863ARSZ-3REEL's simultaneous dual-channel sampling to preserve inter-element phase relationships across hydrophone arrays. The 80 dB SNR and 90 dB channel-to-channel isolation deliver the dynamic range required for detecting weak returns in noisy underwater environments, while 14-bit resolution and 5.2 microsecond conversion time are sufficient for narrowband and broadband sonar processing. The LC2MOS process gives the device excellent linearity for the spectrum-analysis and adaptive-filter computations that follow the ADC. The 5 V single-supply operation eases integration into portable marine electronics with limited power budgets. Multiple AD7863 devices can be cascaded to expand channel count for larger arrays.
Recomendado
Spectrum Analysis and RF Test Instrumentation
Spectrum analyzers and RF test instruments benefit from the AD7863ARSZ-3REEL's combination of 14-bit resolution, 175 kSPS sampling, and 80 dB SNR for capturing baseband I/Q signals and IF strips. The simultaneous dual-channel sampling is essential for I/Q demodulation where phase balance between the two channels determines image-rejection performance. The wide +/-10 V bipolar input range lets the ADC connect directly to the output of IF gain stages without external attenuation. The parallel interface simplifies integration into FPGA-based real-time spectrum analyzers where the ADC feeds an FFT engine running at full line rate. The 28-SSOP footprint is appropriate for portable and benchtop instrument form factors.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AD7863ARSZ-3REEL — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | AD7863ARSZ-2REEL | AD7863ARSZ-3REEL7 | AD7863ARSZ-2REEL7 | AD7863ARSZ-10REEL | AD7863ARSZ-10REEL7 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits |
| Sampling Rate | 175 kSPS per ADC | 175 kSPS | 175 kSPS | 175 kSPS | 175 kSPS | 175 kSPS |
| Input Voltage Range | +/-10 V bipolar | +/-5 V bipolar | +/-10 V bipolar | +/-5 V bipolar | 0 to 5 V unipolar | 0 to 5 V unipolar |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Reel Size | 13-inch (REEL) | 13-inch | 7-inch | 7-inch | 13-inch | 7-inch |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
Diferenciadores clave
- True bipolar +/-10 V inputs without external signal conditioning (frente a AD7863ARSZ-2REEL)
- Simultaneous dual-channel sampling preserves phase relationships (frente a Sequential-sampling SAR ADCs)
- Compact 28-SSOP package versus LQFP-64 alternatives (frente a AD7606 (8-channel, 64-LQFP))
Notas de diseño
The AD7863 operates from a single 5 V analog supply on pin 6 (VDD). Estimated: total supply current is approximately 60 mA with both ADCs converting at 175 kSPS, giving 300 mW dissipation. Bypass VDD with a 10 microfarad tantalum capacitor in parallel with a 0.1 microfarad ceramic placed within 5 mm of the supply pin. Use a star-ground topology with the analog ground plane tied to the digital ground plane only at the AGND pin of the AD7863 to avoid ground-loop noise coupling into the analog input stage.
Place the two 0.1 microfarad ceramic reference-bypass capacitors on VREF (pin 7) and REFIN (pin 8) as close to the IC pins as possible, with traces routed directly to AGND. Keep analog input traces (VA1, VA2, VB1, VB2) short and guarded with analog ground on both sides to minimize crosstalk between channel pairs. The SSOP-28 lead pitch is 0.65 mm, so use 0.4 mm-wide traces between pads and escape to a via-in-pad only when necessary. Route digital outputs (DB0-DB13) and control signals (CONVST, RD, CS, BUSY) on the opposite side of the ground plane from the analog signals to avoid digital-noise coupling into the analog front-end.
Do not connect REFIN directly to VDD; doing so disables the ADC reference and yields all-zero conversions. Always drive REFIN either from the internal REFOUT pin with both 0.1 microfarad bypass caps installed, or from an external low-impedance reference such as the ADR4550. When using the bipolar +/-10 V input range, ensure the input common-mode voltage stays within the device's input-common-mode range relative to AGND, otherwise channel-to-channel isolation degrades. Finally, do not exceed the maximum CONVST pulse width or leave CONVST floating - tie it to the system controller through a defined logic-level driver.
Estimated: with 80 dB SNR, the LSB size for the +/-10 V input range is approximately 1.22 mV. To preserve this resolution, the input-signal source impedance should be below 1 kohm to avoid voltage-divider errors with the AD7863's switched-capacitor input. Add a wide-bandwidth buffer amplifier (such as the AD8021 or AD8450) between high-impedance sensors and the AD7863 analog inputs. Also enable the BUSY signal as a status flag in the system controller to avoid reading data during the conversion window, which would corrupt the parallel bus output.
Información de cumplimiento
Analog Devices AD7863 family is RoHS compliant and lead-free per the manufacturer product page. AEC-Q100 qualification is not applicable because this is an industrial/consumer-grade ADC, not an automotive-qualified part. Halogen-free status not explicitly stated in available data.
